1	// dear imgui, v1.66b
2	// (internal structures/api)
3
4	// You may use this file to debug, understand or extend ImGui features but we don't provide any guarantee of forward compatibility!
5	// Set:
6	// #define IMGUI_DEFINE_MATH_OPERATORS
7	// To implement maths operators for ImVec2 (disabled by default to not collide with using IM_VEC2_CLASS_EXTRA along with your own math types+operators)
8
9	#pragma once
10
11	#ifndef IMGUI_VERSION
12	#error Must include imgui.h before imgui_internal.h
13	#endif
14
15	#include <stdio.h> // FILE*
16	#include <stdlib.h> // NULL, malloc, free, qsort, atoi, atof
17	#include <math.h> // sqrtf, fabsf, fmodf, powf, floorf, ceilf, cosf, sinf
18	#include <limits.h> // INT_MIN, INT_MAX
19
20	#ifdef _MSC_VER
21	#pragma warning (push)
22	#pragma warning (disable: 4251) // class 'xxx' needs to have dll-interface to be used by clients of struct 'xxx' // when IMGUI_API is set to__declspec(dllexport)
23	#endif
24
25	#ifdef __clang__
26	#pragma clang diagnostic push
27	#pragma clang diagnostic ignored "-Wunused-function" // for stb_textedit.h
28	#pragma clang diagnostic ignored "-Wmissing-prototypes" // for stb_textedit.h
29	#pragma clang diagnostic ignored "-Wold-style-cast"
30	#endif
31
32	//-----------------------------------------------------------------------------
33	// Forward Declarations
34	//-----------------------------------------------------------------------------
35
36	struct ImRect; // An axis-aligned rectangle (2 points)
37	struct ImDrawDataBuilder; // Helper to build a ImDrawData instance
38	struct ImDrawListSharedData; // Data shared between all ImDrawList instances
39	struct ImGuiColorMod; // Stacked color modifier, backup of modified data so we can restore it
40	struct ImGuiColumnData; // Storage data for a single column
41	struct ImGuiColumnsSet; // Storage data for a columns set
42	struct ImGuiContext; // Main imgui context
43	struct ImGuiGroupData; // Stacked storage data for BeginGroup()/EndGroup()
44	struct ImGuiInputTextState; // Internal state of the currently focused/edited text input box
45	struct ImGuiItemHoveredDataBackup; // Backup and restore IsItemHovered() internal data
46	struct ImGuiMenuColumns; // Simple column measurement, currently used for MenuItem() only
47	struct ImGuiNavMoveResult; // Result of a directional navigation move query result
48	struct ImGuiNextWindowData; // Storage for SetNexWindow** functions
49	struct ImGuiPopupRef; // Storage for current popup stack
50	struct ImGuiSettingsHandler; // Storage for one type registered in the .ini file
51	struct ImGuiStyleMod; // Stacked style modifier, backup of modified data so we can restore it
52	struct ImGuiWindow; // Storage for one window
53	struct ImGuiWindowTempData; // Temporary storage for one window (that's the data which in theory we could ditch at the end of the frame)
54	struct ImGuiWindowSettings; // Storage for window settings stored in .ini file (we keep one of those even if the actual window wasn't instanced during this session)
55
56	// Use your programming IDE "Go to definition" facility on the names of the center columns to find the actual flags/enum lists.
57	typedef int ImGuiLayoutType; // -> enum ImGuiLayoutType_ // Enum: Horizontal or vertical
58	typedef int ImGuiButtonFlags; // -> enum ImGuiButtonFlags_ // Flags: for ButtonEx(), ButtonBehavior()
59	typedef int ImGuiItemFlags; // -> enum ImGuiItemFlags_ // Flags: for PushItemFlag()
60	typedef int ImGuiItemStatusFlags; // -> enum ImGuiItemStatusFlags_ // Flags: for DC.LastItemStatusFlags
61	typedef int ImGuiNavHighlightFlags; // -> enum ImGuiNavHighlightFlags_ // Flags: for RenderNavHighlight()
62	typedef int ImGuiNavDirSourceFlags; // -> enum ImGuiNavDirSourceFlags_ // Flags: for GetNavInputAmount2d()
63	typedef int ImGuiNavMoveFlags; // -> enum ImGuiNavMoveFlags_ // Flags: for navigation requests
64	typedef int ImGuiSeparatorFlags; // -> enum ImGuiSeparatorFlags_ // Flags: for Separator() - internal
65	typedef int ImGuiSliderFlags; // -> enum ImGuiSliderFlags_ // Flags: for SliderBehavior()
66	typedef int ImGuiDragFlags; // -> enum ImGuiDragFlags_ // Flags: for DragBehavior()
67
68	//-------------------------------------------------------------------------
69	// STB libraries
70	//-------------------------------------------------------------------------
71
72	namespace ImGuiStb
73	{
74
75	#undef STB_TEXTEDIT_STRING
76	#undef STB_TEXTEDIT_CHARTYPE
77	#define STB_TEXTEDIT_STRING ImGuiInputTextState
78	#define STB_TEXTEDIT_CHARTYPE ImWchar
79	#define STB_TEXTEDIT_GETWIDTH_NEWLINE -1.0f
80	#include "imstb_textedit.h"
81
82	} // namespace ImGuiStb
83
84	//-----------------------------------------------------------------------------
85	// Context
86	//-----------------------------------------------------------------------------
87
88	#ifndef GImGui
89	extern IMGUI_API ImGuiContext* GImGui; // Current implicit ImGui context pointer
90	#endif
91
92	//-----------------------------------------------------------------------------
93	// Helpers
94	//-----------------------------------------------------------------------------
95
96	#define IM_PI 3.14159265358979323846f
97	#ifdef _WIN32
98	#define IM_NEWLINE "\r\n" // Play it nice with Windows users (2018/05 news: Microsoft announced that Notepad will finally display Unix-style carriage returns!)
99	#else
100	#define IM_NEWLINE "\n"
101	#endif
102	#define IM_STATIC_ASSERT(_COND) typedef char static_assertion_##__line__[(_COND)?1:-1]
103	#define IM_F32_TO_INT8_UNBOUND(_VAL) ((int)((_VAL) * 255.0f + ((_VAL)>=0 ? 0.5f : -0.5f))) // Unsaturated, for display purpose
104	#define IM_F32_TO_INT8_SAT(_VAL) ((int)(ImSaturate(_VAL) * 255.0f + 0.5f)) // Saturated, always output 0..255
105
106	// Enforce cdecl calling convention for functions called by the standard library, in case compilation settings changed the default to e.g. __vectorcall
107	#ifdef _MSC_VER
108	#define IMGUI_CDECL __cdecl
109	#else
110	#define IMGUI_CDECL
111	#endif
112
113	// Helpers: UTF-8 <> wchar
114	IMGUI_API int ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end); // return output UTF-8 bytes count
115	IMGUI_API int ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end); // read one character. return input UTF-8 bytes count
116	IMGUI_API int ImTextStrFromUtf8(ImWchar* buf, int buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL); // return input UTF-8 bytes count
117	IMGUI_API int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end); // return number of UTF-8 code-points (NOT bytes count)
118	IMGUI_API int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end); // return number of bytes to express one char in UTF-8
119	IMGUI_API int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end); // return number of bytes to express string in UTF-8
120
121	// Helpers: Misc
122	IMGUI_API ImU32 ImHash(const void* data, int data_size, ImU32 seed = 0); // Pass data_size==0 for zero-terminated strings
123	IMGUI_API void* ImFileLoadToMemory(const char* filename, const char* file_open_mode, size_t* out_file_size = NULL, int padding_bytes = 0);
124	IMGUI_API FILE* ImFileOpen(const char* filename, const char* file_open_mode);
125	static inline bool ImCharIsBlankA(char c) { return c == ' ' || c == '\t'; }
126	static inline bool ImCharIsBlankW(unsigned int c) { return c == ' ' || c == '\t' || c == 0x3000; }
127	static inline bool ImIsPowerOfTwo(int v) { return v != 0 && (v & (v - 1)) == 0; }
128	static inline int ImUpperPowerOfTwo(int v) { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; }
129	#define ImQsort qsort
130
131	// Helpers: Geometry
132	IMGUI_API ImVec2 ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& p);
133	IMGUI_API bool ImTriangleContainsPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
134	IMGUI_API ImVec2 ImTriangleClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
135	IMGUI_API void ImTriangleBarycentricCoords(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p, float& out_u, float& out_v, float& out_w);
136	IMGUI_API ImGuiDir ImGetDirQuadrantFromDelta(float dx, float dy);
137
138	// Helpers: String
139	IMGUI_API int ImStricmp(const char* str1, const char* str2);
140	IMGUI_API int ImStrnicmp(const char* str1, const char* str2, size_t count);
141	IMGUI_API void ImStrncpy(char* dst, const char* src, size_t count);
142	IMGUI_API char* ImStrdup(const char* str);
143	IMGUI_API const char* ImStrchrRange(const char* str_begin, const char* str_end, char c);
144	IMGUI_API int ImStrlenW(const ImWchar* str);
145	IMGUI_API const char* ImStreolRange(const char* str, const char* str_end); // End end-of-line
146	IMGUI_API const ImWchar*ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin); // Find beginning-of-line
147	IMGUI_API const char* ImStristr(const char* haystack, const char* haystack_end, const char* needle, const char* needle_end);
148	IMGUI_API void ImStrTrimBlanks(char* str);
149	IMGUI_API int ImFormatString(char* buf, size_t buf_size, const char* fmt, ...) IM_FMTARGS(3);
150	IMGUI_API int ImFormatStringV(char* buf, size_t buf_size, const char* fmt, va_list args) IM_FMTLIST(3);
151	IMGUI_API const char* ImParseFormatFindStart(const char* format);
152	IMGUI_API const char* ImParseFormatFindEnd(const char* format);
153	IMGUI_API const char* ImParseFormatTrimDecorations(const char* format, char* buf, int buf_size);
154	IMGUI_API int ImParseFormatPrecision(const char* format, int default_value);
155
156	// Helpers: ImVec2/ImVec4 operators
157	// We are keeping those disabled by default so they don't leak in user space, to allow user enabling implicit cast operators between ImVec2 and their own types (using IM_VEC2_CLASS_EXTRA etc.)
158	// We unfortunately don't have a unary- operator for ImVec2 because this would needs to be defined inside the class itself.
159	#ifdef IMGUI_DEFINE_MATH_OPERATORS
160	static inline ImVec2 operator*(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x*rhs, lhs.y*rhs); }
161	static inline ImVec2 operator/(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x/rhs, lhs.y/rhs); }
162	static inline ImVec2 operator+(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x+rhs.x, lhs.y+rhs.y); }
163	static inline ImVec2 operator-(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x-rhs.x, lhs.y-rhs.y); }
164	static inline ImVec2 operator*(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x*rhs.x, lhs.y*rhs.y); }
165	static inline ImVec2 operator/(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x/rhs.x, lhs.y/rhs.y); }
166	static inline ImVec2& operator+=(ImVec2& lhs, const ImVec2& rhs) { lhs.x += rhs.x; lhs.y += rhs.y; return lhs; }
167	static inline ImVec2& operator-=(ImVec2& lhs, const ImVec2& rhs) { lhs.x -= rhs.x; lhs.y -= rhs.y; return lhs; }
168	static inline ImVec2& operator*=(ImVec2& lhs, const float rhs) { lhs.x *= rhs; lhs.y *= rhs; return lhs; }
169	static inline ImVec2& operator/=(ImVec2& lhs, const float rhs) { lhs.x /= rhs; lhs.y /= rhs; return lhs; }
170	static inline ImVec4 operator+(const ImVec4& lhs, const ImVec4& rhs) { return ImVec4(lhs.x+rhs.x, lhs.y+rhs.y, lhs.z+rhs.z, lhs.w+rhs.w); }
171	static inline ImVec4 operator-(const ImVec4& lhs, const ImVec4& rhs) { return ImVec4(lhs.x-rhs.x, lhs.y-rhs.y, lhs.z-rhs.z, lhs.w-rhs.w); }
172	static inline ImVec4 operator*(const ImVec4& lhs, const ImVec4& rhs) { return ImVec4(lhs.x*rhs.x, lhs.y*rhs.y, lhs.z*rhs.z, lhs.w*rhs.w); }
173	#endif
174
175	// Helpers: Maths
176	// - Wrapper for standard libs functions. (Note that imgui_demo.cpp does _not_ use them to keep the code easy to copy)
177	#ifndef IMGUI_DISABLE_MATH_FUNCTIONS
178	static inline float ImFabs(float x) { return fabsf(x: x); }
179	static inline float ImSqrt(float x) { return sqrtf(x: x); }
180	static inline float ImPow(float x, float y) { return powf(x: x, y: y); }
181	static inline double ImPow(double x, double y) { return pow(x: x, y: y); }
182	static inline float ImFmod(float x, float y) { return fmodf(x: x, y: y); }
183	static inline double ImFmod(double x, double y) { return fmod(x: x, y: y); }
184	static inline float ImCos(float x) { return cosf(x: x); }
185	static inline float ImSin(float x) { return sinf(x: x); }
186	static inline float ImAcos(float x) { return acosf(x: x); }
187	static inline float ImAtan2(float y, float x) { return atan2f(y: y, x: x); }
188	static inline double ImAtof(const char* s) { return atof(nptr: s); }
189	static inline float ImFloorStd(float x) { return floorf(x: x); } // we already uses our own ImFloor() { return (float)(int)v } internally so the standard one wrapper is named differently (it's used by stb_truetype)
190	static inline float ImCeil(float x) { return ceilf(x: x); }
191	#endif
192	// - ImMin/ImMax/ImClamp/ImLerp/ImSwap are used by widgets which support for variety of types: signed/unsigned int/long long float/double, using templates here but we could also redefine them 6 times
193	template<typename T> static inline T ImMin(T lhs, T rhs) { return lhs < rhs ? lhs : rhs; }
194	template<typename T> static inline T ImMax(T lhs, T rhs) { return lhs >= rhs ? lhs : rhs; }
195	template<typename T> static inline T ImClamp(T v, T mn, T mx) { return (v < mn) ? mn : (v > mx) ? mx : v; }
196	template<typename T> static inline T ImLerp(T a, T b, float t) { return (T)(a + (b - a) * t); }
197	template<typename T> static inline void ImSwap(T& a, T& b) { T tmp = a; a = b; b = tmp; }
198	// - Misc maths helpers
199	static inline ImVec2 ImMin(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x < rhs.x ? lhs.x : rhs.x, lhs.y < rhs.y ? lhs.y : rhs.y); }
200	static inline ImVec2 ImMax(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x >= rhs.x ? lhs.x : rhs.x, lhs.y >= rhs.y ? lhs.y : rhs.y); }
201	static inline ImVec2 ImClamp(const ImVec2& v, const ImVec2& mn, ImVec2 mx) { return ImVec2((v.x < mn.x) ? mn.x : (v.x > mx.x) ? mx.x : v.x, (v.y < mn.y) ? mn.y : (v.y > mx.y) ? mx.y : v.y); }
202	static inline ImVec2 ImLerp(const ImVec2& a, const ImVec2& b, float t) { return ImVec2(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t); }
203	static inline ImVec2 ImLerp(const ImVec2& a, const ImVec2& b, const ImVec2& t) { return ImVec2(a.x + (b.x - a.x) * t.x, a.y + (b.y - a.y) * t.y); }
204	static inline ImVec4 ImLerp(const ImVec4& a, const ImVec4& b, float t) { return ImVec4(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t, a.z + (b.z - a.z) * t, a.w + (b.w - a.w) * t); }
205	static inline float ImSaturate(float f) { return (f < 0.0f) ? 0.0f : (f > 1.0f) ? 1.0f : f; }
206	static inline float ImLengthSqr(const ImVec2& lhs) { return lhs.x*lhs.x + lhs.y*lhs.y; }
207	static inline float ImLengthSqr(const ImVec4& lhs) { return lhs.x*lhs.x + lhs.y*lhs.y + lhs.z*lhs.z + lhs.w*lhs.w; }
208	static inline float ImInvLength(const ImVec2& lhs, float fail_value) { float d = lhs.x*lhs.x + lhs.y*lhs.y; if (d > 0.0f) return 1.0f / ImSqrt(x: d); return fail_value; }
209	static inline float ImFloor(float f) { return (float)(int)f; }
210	static inline ImVec2 ImFloor(const ImVec2& v) { return ImVec2((float)(int)v.x, (float)(int)v.y); }
211	static inline float ImDot(const ImVec2& a, const ImVec2& b) { return a.x * b.x + a.y * b.y; }
212	static inline ImVec2 ImRotate(const ImVec2& v, float cos_a, float sin_a) { return ImVec2(v.x * cos_a - v.y * sin_a, v.x * sin_a + v.y * cos_a); }
213	static inline float ImLinearSweep(float current, float target, float speed) { if (current < target) return ImMin(lhs: current + speed, rhs: target); if (current > target) return ImMax(lhs: current - speed, rhs: target); return current; }
214	static inline ImVec2 ImMul(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x * rhs.x, lhs.y * rhs.y); }
215
216	// Helper: ImPool<>. Basic keyed storage for contiguous instances, slow/amortized insertion, O(1) indexable, O(Log N) queries by ID over a dense/hot buffer,
217	// Honor constructor/destructor. Add/remove invalidate all pointers. Indexes have the same lifetime as the associated object.
218	typedef int ImPoolIdx;
219	template<typename T>
220	struct IMGUI_API ImPool
221	{
222	ImVector<T> Data; // Contiguous data
223	ImGuiStorage Map; // ID->Index
224	ImPoolIdx FreeIdx; // Next free idx to use
225
226	ImPool() { FreeIdx = 0; }
227	~ImPool() { Clear(); }
228	T* GetByKey(ImGuiID key) { int idx = Map.GetInt(key, default_val: -1); return (idx != -1) ? &Data[idx] : NULL; }
229	T* GetByIndex(ImPoolIdx n) { return &Data[n]; }
230	ImPoolIdx GetIndex(const T* p) const { IM_ASSERT(p >= Data.Data && p < Data.Data + Data.Size); return (ImPoolIdx)(p - Data.Data); }
231	T* GetOrAddByKey(ImGuiID key) { int* p_idx = Map.GetIntRef(key, default_val: -1); if (*p_idx != -1) return &Data[*p_idx]; *p_idx = FreeIdx; return Add(); }
232	void Clear() { for (int n = 0; n < Map.Data.Size; n++) { int idx = Map.Data[n].val_i; if (idx != -1) Data[idx].~T(); } Map.Clear(); Data.clear(); FreeIdx = 0; }
233	T* Add() { int idx = FreeIdx; if (idx == Data.Size) { Data.resize(Data.Size + 1); FreeIdx++; } else { FreeIdx = *(int*)&Data[idx]; } IM_PLACEMENT_NEW(&Data[idx]) T(); return &Data[idx]; }
234	void Remove(ImGuiID key, const T* p) { Remove(key, GetIndex(p)); }
235	void Remove(ImGuiID key, ImPoolIdx idx) { Data[idx].~T(); *(int*)&Data[idx] = FreeIdx; FreeIdx = idx; Map.SetInt(key, val: -1); }
236	void Reserve(int capacity) { Data.reserve(capacity); Map.Data.reserve(new_capacity: capacity); }
237	int GetSize() const { return Data.Size; }
238	};
239
240	//-----------------------------------------------------------------------------
241	// Types
242	//-----------------------------------------------------------------------------
243
244	// 1D vector (this odd construct is used to facilitate the transition between 1D and 2D and maintenance of some patches)
245	struct ImVec1
246	{
247	float x;
248	ImVec1() { x = 0.0f; }
249	ImVec1(float _x) { x = _x; }
250	};
251
252	enum ImGuiButtonFlags_
253	{
254	ImGuiButtonFlags_None = 0,
255	ImGuiButtonFlags_Repeat = 1 << 0, // hold to repeat
256	ImGuiButtonFlags_PressedOnClickRelease = 1 << 1, // return true on click + release on same item [DEFAULT if no PressedOn* flag is set]
257	ImGuiButtonFlags_PressedOnClick = 1 << 2, // return true on click (default requires click+release)
258	ImGuiButtonFlags_PressedOnRelease = 1 << 3, // return true on release (default requires click+release)
259	ImGuiButtonFlags_PressedOnDoubleClick = 1 << 4, // return true on double-click (default requires click+release)
260	ImGuiButtonFlags_FlattenChildren = 1 << 5, // allow interactions even if a child window is overlapping
261	ImGuiButtonFlags_AllowItemOverlap = 1 << 6, // require previous frame HoveredId to either match id or be null before being usable, use along with SetItemAllowOverlap()
262	ImGuiButtonFlags_DontClosePopups = 1 << 7, // disable automatically closing parent popup on press // [UNUSED]
263	ImGuiButtonFlags_Disabled = 1 << 8, // disable interactions
264	ImGuiButtonFlags_AlignTextBaseLine = 1 << 9, // vertically align button to match text baseline - ButtonEx() only // FIXME: Should be removed and handled by SmallButton(), not possible currently because of DC.CursorPosPrevLine
265	ImGuiButtonFlags_NoKeyModifiers = 1 << 10, // disable interaction if a key modifier is held
266	ImGuiButtonFlags_NoHoldingActiveID = 1 << 11, // don't set ActiveId while holding the mouse (ImGuiButtonFlags_PressedOnClick only)
267	ImGuiButtonFlags_PressedOnDragDropHold = 1 << 12, // press when held into while we are drag and dropping another item (used by e.g. tree nodes, collapsing headers)
268	ImGuiButtonFlags_NoNavFocus = 1 << 13 // don't override navigation focus when activated
269	};
270
271	enum ImGuiSliderFlags_
272	{
273	ImGuiSliderFlags_None = 0,
274	ImGuiSliderFlags_Vertical = 1 << 0
275	};
276
277	enum ImGuiDragFlags_
278	{
279	ImGuiDragFlags_None = 0,
280	ImGuiDragFlags_Vertical = 1 << 0
281	};
282
283	enum ImGuiColumnsFlags_
284	{
285	// Default: 0
286	ImGuiColumnsFlags_None = 0,
287	ImGuiColumnsFlags_NoBorder = 1 << 0, // Disable column dividers
288	ImGuiColumnsFlags_NoResize = 1 << 1, // Disable resizing columns when clicking on the dividers
289	ImGuiColumnsFlags_NoPreserveWidths = 1 << 2, // Disable column width preservation when adjusting columns
290	ImGuiColumnsFlags_NoForceWithinWindow = 1 << 3, // Disable forcing columns to fit within window
291	ImGuiColumnsFlags_GrowParentContentsSize= 1 << 4 // (WIP) Restore pre-1.51 behavior of extending the parent window contents size but _without affecting the columns width at all_. Will eventually remove.
292	};
293
294	enum ImGuiSelectableFlagsPrivate_
295	{
296	// NB: need to be in sync with last value of ImGuiSelectableFlags_
297	ImGuiSelectableFlags_NoHoldingActiveID = 1 << 10,
298	ImGuiSelectableFlags_PressedOnClick = 1 << 11,
299	ImGuiSelectableFlags_PressedOnRelease = 1 << 12,
300	ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 13
301	};
302
303	enum ImGuiSeparatorFlags_
304	{
305	ImGuiSeparatorFlags_None = 0,
306	ImGuiSeparatorFlags_Horizontal = 1 << 0, // Axis default to current layout type, so generally Horizontal unless e.g. in a menu bar
307	ImGuiSeparatorFlags_Vertical = 1 << 1
308	};
309
310	// Storage for LastItem data
311	enum ImGuiItemStatusFlags_
312	{
313	ImGuiItemStatusFlags_None = 0,
314	ImGuiItemStatusFlags_HoveredRect = 1 << 0,
315	ImGuiItemStatusFlags_HasDisplayRect = 1 << 1,
316	ImGuiItemStatusFlags_Edited = 1 << 2 // Value exposed by item was edited in the current frame (should match the bool return value of most widgets)
317	};
318
319	// FIXME: this is in development, not exposed/functional as a generic feature yet.
320	enum ImGuiLayoutType_
321	{
322	ImGuiLayoutType_Vertical,
323	ImGuiLayoutType_Horizontal
324	};
325
326	enum ImGuiAxis
327	{
328	ImGuiAxis_None = -1,
329	ImGuiAxis_X = 0,
330	ImGuiAxis_Y = 1
331	};
332
333	enum ImGuiPlotType
334	{
335	ImGuiPlotType_Lines,
336	ImGuiPlotType_Histogram
337	};
338
339	enum ImGuiInputSource
340	{
341	ImGuiInputSource_None = 0,
342	ImGuiInputSource_Mouse,
343	ImGuiInputSource_Nav,
344	ImGuiInputSource_NavKeyboard, // Only used occasionally for storage, not tested/handled by most code
345	ImGuiInputSource_NavGamepad, // "
346	ImGuiInputSource_COUNT
347	};
348
349	// FIXME-NAV: Clarify/expose various repeat delay/rate
350	enum ImGuiInputReadMode
351	{
352	ImGuiInputReadMode_Down,
353	ImGuiInputReadMode_Pressed,
354	ImGuiInputReadMode_Released,
355	ImGuiInputReadMode_Repeat,
356	ImGuiInputReadMode_RepeatSlow,
357	ImGuiInputReadMode_RepeatFast
358	};
359
360	enum ImGuiNavHighlightFlags_
361	{
362	ImGuiNavHighlightFlags_None = 0,
363	ImGuiNavHighlightFlags_TypeDefault = 1 << 0,
364	ImGuiNavHighlightFlags_TypeThin = 1 << 1,
365	ImGuiNavHighlightFlags_AlwaysDraw = 1 << 2,
366	ImGuiNavHighlightFlags_NoRounding = 1 << 3
367	};
368
369	enum ImGuiNavDirSourceFlags_
370	{
371	ImGuiNavDirSourceFlags_None = 0,
372	ImGuiNavDirSourceFlags_Keyboard = 1 << 0,
373	ImGuiNavDirSourceFlags_PadDPad = 1 << 1,
374	ImGuiNavDirSourceFlags_PadLStick = 1 << 2
375	};
376
377	enum ImGuiNavMoveFlags_
378	{
379	ImGuiNavMoveFlags_None = 0,
380	ImGuiNavMoveFlags_LoopX = 1 << 0, // On failed request, restart from opposite side
381	ImGuiNavMoveFlags_LoopY = 1 << 1,
382	ImGuiNavMoveFlags_WrapX = 1 << 2, // On failed request, request from opposite side one line down (when NavDir==right) or one line up (when NavDir==left)
383	ImGuiNavMoveFlags_WrapY = 1 << 3, // This is not super useful for provided for completeness
384	ImGuiNavMoveFlags_AllowCurrentNavId = 1 << 4, // Allow scoring and considering the current NavId as a move target candidate. This is used when the move source is offset (e.g. pressing PageDown actually needs to send a Up move request, if we are pressing PageDown from the bottom-most item we need to stay in place)
385	ImGuiNavMoveFlags_AlsoScoreVisibleSet = 1 << 5 // Store alternate result in NavMoveResultLocalVisibleSet that only comprise elements that are already fully visible.
386	};
387
388	enum ImGuiNavForward
389	{
390	ImGuiNavForward_None,
391	ImGuiNavForward_ForwardQueued,
392	ImGuiNavForward_ForwardActive
393	};
394
395	enum ImGuiPopupPositionPolicy
396	{
397	ImGuiPopupPositionPolicy_Default,
398	ImGuiPopupPositionPolicy_ComboBox
399	};
400
401	// 2D axis aligned bounding-box
402	// NB: we can't rely on ImVec2 math operators being available here
403	struct IMGUI_API ImRect
404	{
405	ImVec2 Min; // Upper-left
406	ImVec2 Max; // Lower-right
407
408	ImRect() : Min(FLT_MAX,FLT_MAX), Max(-FLT_MAX,-FLT_MAX) {}
409	ImRect(const ImVec2& min, const ImVec2& max) : Min(min), Max(max) {}
410	ImRect(const ImVec4& v) : Min(v.x, v.y), Max(v.z, v.w) {}
411	ImRect(float x1, float y1, float x2, float y2) : Min(x1, y1), Max(x2, y2) {}
412
413	ImVec2 GetCenter() const { return ImVec2((Min.x + Max.x) * 0.5f, (Min.y + Max.y) * 0.5f); }
414	ImVec2 GetSize() const { return ImVec2(Max.x - Min.x, Max.y - Min.y); }
415	float GetWidth() const { return Max.x - Min.x; }
416	float GetHeight() const { return Max.y - Min.y; }
417	ImVec2 GetTL() const { return Min; } // Top-left
418	ImVec2 GetTR() const { return ImVec2(Max.x, Min.y); } // Top-right
419	ImVec2 GetBL() const { return ImVec2(Min.x, Max.y); } // Bottom-left
420	ImVec2 GetBR() const { return Max; } // Bottom-right
421	bool Contains(const ImVec2& p) const { return p.x >= Min.x && p.y >= Min.y && p.x < Max.x && p.y < Max.y; }
422	bool Contains(const ImRect& r) const { return r.Min.x >= Min.x && r.Min.y >= Min.y && r.Max.x <= Max.x && r.Max.y <= Max.y; }
423	bool Overlaps(const ImRect& r) const { return r.Min.y < Max.y && r.Max.y > Min.y && r.Min.x < Max.x && r.Max.x > Min.x; }
424	void Add(const ImVec2& p) { if (Min.x > p.x) Min.x = p.x; if (Min.y > p.y) Min.y = p.y; if (Max.x < p.x) Max.x = p.x; if (Max.y < p.y) Max.y = p.y; }
425	void Add(const ImRect& r) { if (Min.x > r.Min.x) Min.x = r.Min.x; if (Min.y > r.Min.y) Min.y = r.Min.y; if (Max.x < r.Max.x) Max.x = r.Max.x; if (Max.y < r.Max.y) Max.y = r.Max.y; }
426	void Expand(const float amount) { Min.x -= amount; Min.y -= amount; Max.x += amount; Max.y += amount; }
427	void Expand(const ImVec2& amount) { Min.x -= amount.x; Min.y -= amount.y; Max.x += amount.x; Max.y += amount.y; }
428	void Translate(const ImVec2& d) { Min.x += d.x; Min.y += d.y; Max.x += d.x; Max.y += d.y; }
429	void TranslateX(float dx) { Min.x += dx; Max.x += dx; }
430	void TranslateY(float dy) { Min.y += dy; Max.y += dy; }
431	void ClipWith(const ImRect& r) { Min = ImMax(lhs: Min, rhs: r.Min); Max = ImMin(lhs: Max, rhs: r.Max); } // Simple version, may lead to an inverted rectangle, which is fine for Contains/Overlaps test but not for display.
432	void ClipWithFull(const ImRect& r) { Min = ImClamp(v: Min, mn: r.Min, mx: r.Max); Max = ImClamp(v: Max, mn: r.Min, mx: r.Max); } // Full version, ensure both points are fully clipped.
433	void Floor() { Min.x = (float)(int)Min.x; Min.y = (float)(int)Min.y; Max.x = (float)(int)Max.x; Max.y = (float)(int)Max.y; }
434	bool IsInverted() const { return Min.x > Max.x || Min.y > Max.y; }
435	};
436
437	// Stacked color modifier, backup of modified data so we can restore it
438	struct ImGuiColorMod
439	{
440	ImGuiCol Col;
441	ImVec4 BackupValue;
442	};
443
444	// Stacked style modifier, backup of modified data so we can restore it. Data type inferred from the variable.
445	struct ImGuiStyleMod
446	{
447	ImGuiStyleVar VarIdx;
448	union { int BackupInt[2]; float BackupFloat[2]; };
449	ImGuiStyleMod(ImGuiStyleVar idx, int v) { VarIdx = idx; BackupInt[0] = v; }
450	ImGuiStyleMod(ImGuiStyleVar idx, float v) { VarIdx = idx; BackupFloat[0] = v; }
451	ImGuiStyleMod(ImGuiStyleVar idx, ImVec2 v) { VarIdx = idx; BackupFloat[0] = v.x; BackupFloat[1] = v.y; }
452	};
453
454	// Stacked storage data for BeginGroup()/EndGroup()
455	struct ImGuiGroupData
456	{
457	ImVec2 BackupCursorPos;
458	ImVec2 BackupCursorMaxPos;
459	ImVec1 BackupIndent;
460	ImVec1 BackupGroupOffset;
461	ImVec2 BackupCurrentLineSize;
462	float BackupCurrentLineTextBaseOffset;
463	float BackupLogLinePosY;
464	ImGuiID BackupActiveIdIsAlive;
465	bool BackupActiveIdPreviousFrameIsAlive;
466	bool AdvanceCursor;
467	};
468
469	// Simple column measurement, currently used for MenuItem() only.. This is very short-sighted/throw-away code and NOT a generic helper.
470	struct IMGUI_API ImGuiMenuColumns
471	{
472	int Count;
473	float Spacing;
474	float Width, NextWidth;
475	float Pos[4], NextWidths[4];
476
477	ImGuiMenuColumns();
478	void Update(int count, float spacing, bool clear);
479	float DeclColumns(float w0, float w1, float w2);
480	float CalcExtraSpace(float avail_w);
481	};
482
483	// Internal state of the currently focused/edited text input box
484	struct IMGUI_API ImGuiInputTextState
485	{
486	ImGuiID ID; // widget id owning the text state
487	ImVector<ImWchar> TextW; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
488	ImVector<char> InitialText; // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
489	ImVector<char> TempBuffer; // temporary buffer for callback and other other operations. size=capacity.
490	int CurLenA, CurLenW; // we need to maintain our buffer length in both UTF-8 and wchar format.
491	int BufCapacityA; // end-user buffer capacity
492	float ScrollX;
493	ImGuiStb::STB_TexteditState StbState;
494	float CursorAnim;
495	bool CursorFollow;
496	bool SelectedAllMouseLock;
497
498	// Temporarily set when active
499	ImGuiInputTextFlags UserFlags;
500	ImGuiInputTextCallback UserCallback;
501	void* UserCallbackData;
502
503	ImGuiInputTextState() { memset(s: this, c: 0, n: sizeof(*this)); }
504	void CursorAnimReset() { CursorAnim = -0.30f; } // After a user-input the cursor stays on for a while without blinking
505	void CursorClamp() { StbState.cursor = ImMin(lhs: StbState.cursor, rhs: CurLenW); StbState.select_start = ImMin(lhs: StbState.select_start, rhs: CurLenW); StbState.select_end = ImMin(lhs: StbState.select_end, rhs: CurLenW); }
506	bool HasSelection() const { return StbState.select_start != StbState.select_end; }
507	void ClearSelection() { StbState.select_start = StbState.select_end = StbState.cursor; }
508	void SelectAll() { StbState.select_start = 0; StbState.cursor = StbState.select_end = CurLenW; StbState.has_preferred_x = false; }
509	void OnKeyPressed(int key); // Cannot be inline because we call in code in stb_textedit.h implementation
510	};
511
512	// Windows data saved in imgui.ini file
513	struct ImGuiWindowSettings
514	{
515	char* Name;
516	ImGuiID ID;
517	ImVec2 Pos;
518	ImVec2 Size;
519	bool Collapsed;
520
521	ImGuiWindowSettings() { Name = NULL; ID = 0; Pos = Size = ImVec2(0,0); Collapsed = false; }
522	};
523
524	struct ImGuiSettingsHandler
525	{
526	const char* TypeName; // Short description stored in .ini file. Disallowed characters: '[' ']'
527	ImGuiID TypeHash; // == ImHash(TypeName, 0, 0)
528	void* (*ReadOpenFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, const char* name); // Read: Called when entering into a new ini entry e.g. "[Window][Name]"
529	void (*ReadLineFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, void* entry, const char* line); // Read: Called for every line of text within an ini entry
530	void (*WriteAllFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, ImGuiTextBuffer* out_buf); // Write: Output every entries into 'out_buf'
531	void* UserData;
532
533	ImGuiSettingsHandler() { memset(s: this, c: 0, n: sizeof(*this)); }
534	};
535
536	// Storage for current popup stack
537	struct ImGuiPopupRef
538	{
539	ImGuiID PopupId; // Set on OpenPopup()
540	ImGuiWindow* Window; // Resolved on BeginPopup() - may stay unresolved if user never calls OpenPopup()
541	ImGuiWindow* ParentWindow; // Set on OpenPopup()
542	int OpenFrameCount; // Set on OpenPopup()
543	ImGuiID OpenParentId; // Set on OpenPopup(), we need this to differenciate multiple menu sets from each others (e.g. inside menu bar vs loose menu items)
544	ImVec2 OpenPopupPos; // Set on OpenPopup(), preferred popup position (typically == OpenMousePos when using mouse)
545	ImVec2 OpenMousePos; // Set on OpenPopup(), copy of mouse position at the time of opening popup
546	};
547
548	struct ImGuiColumnData
549	{
550	float OffsetNorm; // Column start offset, normalized 0.0 (far left) -> 1.0 (far right)
551	float OffsetNormBeforeResize;
552	ImGuiColumnsFlags Flags; // Not exposed
553	ImRect ClipRect;
554
555	ImGuiColumnData() { OffsetNorm = OffsetNormBeforeResize = 0.0f; Flags = 0; }
556	};
557
558	struct ImGuiColumnsSet
559	{
560	ImGuiID ID;
561	ImGuiColumnsFlags Flags;
562	bool IsFirstFrame;
563	bool IsBeingResized;
564	int Current;
565	int Count;
566	float MinX, MaxX;
567	float LineMinY, LineMaxY;
568	float StartPosY; // Copy of CursorPos
569	float StartMaxPosX; // Copy of CursorMaxPos
570	ImVector<ImGuiColumnData> Columns;
571
572	ImGuiColumnsSet() { Clear(); }
573	void Clear()
574	{
575	ID = 0;
576	Flags = 0;
577	IsFirstFrame = false;
578	IsBeingResized = false;
579	Current = 0;
580	Count = 1;
581	MinX = MaxX = 0.0f;
582	LineMinY = LineMaxY = 0.0f;
583	StartPosY = 0.0f;
584	StartMaxPosX = 0.0f;
585	Columns.clear();
586	}
587	};
588
589	// Data shared between all ImDrawList instances
590	struct IMGUI_API ImDrawListSharedData
591	{
592	ImVec2 TexUvWhitePixel; // UV of white pixel in the atlas
593	ImFont* Font; // Current/default font (optional, for simplified AddText overload)
594	float FontSize; // Current/default font size (optional, for simplified AddText overload)
595	float CurveTessellationTol;
596	ImVec4 ClipRectFullscreen; // Value for PushClipRectFullscreen()
597
598	// Const data
599	// FIXME: Bake rounded corners fill/borders in atlas
600	ImVec2 CircleVtx12[12];
601
602	ImDrawListSharedData();
603	};
604
605	struct ImDrawDataBuilder
606	{
607	ImVector<ImDrawList*> Layers[2]; // Global layers for: regular, tooltip
608
609	void Clear() { for (int n = 0; n < IM_ARRAYSIZE(Layers); n++) Layers[n].resize(new_size: 0); }
610	void ClearFreeMemory() { for (int n = 0; n < IM_ARRAYSIZE(Layers); n++) Layers[n].clear(); }
611	IMGUI_API void FlattenIntoSingleLayer();
612	};
613
614	struct ImGuiNavMoveResult
615	{
616	ImGuiID ID; // Best candidate
617	ImGuiWindow* Window; // Best candidate window
618	float DistBox; // Best candidate box distance to current NavId
619	float DistCenter; // Best candidate center distance to current NavId
620	float DistAxial;
621	ImRect RectRel; // Best candidate bounding box in window relative space
622
623	ImGuiNavMoveResult() { Clear(); }
624	void Clear() { ID = 0; Window = NULL; DistBox = DistCenter = DistAxial = FLT_MAX; RectRel = ImRect(); }
625	};
626
627	// Storage for SetNexWindow** functions
628	struct ImGuiNextWindowData
629	{
630	ImGuiCond PosCond;
631	ImGuiCond SizeCond;
632	ImGuiCond ContentSizeCond;
633	ImGuiCond CollapsedCond;
634	ImGuiCond SizeConstraintCond;
635	ImGuiCond FocusCond;
636	ImGuiCond BgAlphaCond;
637	ImVec2 PosVal;
638	ImVec2 PosPivotVal;
639	ImVec2 SizeVal;
640	ImVec2 ContentSizeVal;
641	bool CollapsedVal;
642	ImRect SizeConstraintRect;
643	ImGuiSizeCallback SizeCallback;
644	void* SizeCallbackUserData;
645	float BgAlphaVal;
646	ImVec2 MenuBarOffsetMinVal; // This is not exposed publicly, so we don't clear it.
647
648	ImGuiNextWindowData()
649	{
650	PosCond = SizeCond = ContentSizeCond = CollapsedCond = SizeConstraintCond = FocusCond = BgAlphaCond = 0;
651	PosVal = PosPivotVal = SizeVal = ImVec2(0.0f, 0.0f);
652	ContentSizeVal = ImVec2(0.0f, 0.0f);
653	CollapsedVal = false;
654	SizeConstraintRect = ImRect();
655	SizeCallback = NULL;
656	SizeCallbackUserData = NULL;
657	BgAlphaVal = FLT_MAX;
658	MenuBarOffsetMinVal = ImVec2(0.0f, 0.0f);
659	}
660
661	void Clear()
662	{
663	PosCond = SizeCond = ContentSizeCond = CollapsedCond = SizeConstraintCond = FocusCond = BgAlphaCond = 0;
664	}
665	};
666
667	// Main imgui context
668	struct ImGuiContext
669	{
670	bool Initialized;
671	bool FrameScopeActive; // Set by NewFrame(), cleared by EndFrame()/Render()
672	bool FontAtlasOwnedByContext; // Io.Fonts-> is owned by the ImGuiContext and will be destructed along with it.
673	ImGuiIO IO;
674	ImGuiStyle Style;
675	ImFont* Font; // (Shortcut) == FontStack.empty() ? IO.Font : FontStack.back()
676	float FontSize; // (Shortcut) == FontBaseSize * g.CurrentWindow->FontWindowScale == window->FontSize(). Text height for current window.
677	float FontBaseSize; // (Shortcut) == IO.FontGlobalScale * Font->Scale * Font->FontSize. Base text height.
678	ImDrawListSharedData DrawListSharedData;
679
680	double Time;
681	int FrameCount;
682	int FrameCountEnded;
683	int FrameCountRendered;
684	ImVector<ImGuiWindow*> Windows; // Windows, sorted in display order, back to front
685	ImVector<ImGuiWindow*> WindowsFocusOrder; // Windows, sorted in focus order, back to front
686	ImVector<ImGuiWindow*> WindowsSortBuffer;
687	ImVector<ImGuiWindow*> CurrentWindowStack;
688	ImGuiStorage WindowsById;
689	int WindowsActiveCount;
690	ImGuiWindow* CurrentWindow; // Being drawn into
691	ImGuiWindow* HoveredWindow; // Will catch mouse inputs
692	ImGuiWindow* HoveredRootWindow; // Will catch mouse inputs (for focus/move only)
693	ImGuiID HoveredId; // Hovered widget
694	bool HoveredIdAllowOverlap;
695	ImGuiID HoveredIdPreviousFrame;
696	float HoveredIdTimer; // Measure contiguous hovering time
697	float HoveredIdNotActiveTimer; // Measure contiguous hovering time where the item has not been active
698	ImGuiID ActiveId; // Active widget
699	ImGuiID ActiveIdPreviousFrame;
700	ImGuiID ActiveIdIsAlive; // Active widget has been seen this frame (we can't use a bool as the ActiveId may change within the frame)
701	float ActiveIdTimer;
702	bool ActiveIdIsJustActivated; // Set at the time of activation for one frame
703	bool ActiveIdAllowOverlap; // Active widget allows another widget to steal active id (generally for overlapping widgets, but not always)
704	bool ActiveIdHasBeenEdited; // Was the value associated to the widget Edited over the course of the Active state.
705	bool ActiveIdPreviousFrameIsAlive;
706	bool ActiveIdPreviousFrameHasBeenEdited;
707	int ActiveIdAllowNavDirFlags; // Active widget allows using directional navigation (e.g. can activate a button and move away from it)
708	ImVec2 ActiveIdClickOffset; // Clicked offset from upper-left corner, if applicable (currently only set by ButtonBehavior)
709	ImGuiWindow* ActiveIdWindow;
710	ImGuiWindow* ActiveIdPreviousFrameWindow;
711	ImGuiInputSource ActiveIdSource; // Activating with mouse or nav (gamepad/keyboard)
712	ImGuiID LastActiveId; // Store the last non-zero ActiveId, useful for animation.
713	float LastActiveIdTimer; // Store the last non-zero ActiveId timer since the beginning of activation, useful for animation.
714	ImVec2 LastValidMousePos;
715	ImGuiWindow* MovingWindow; // Track the window we clicked on (in order to preserve focus). The actually window that is moved is generally MovingWindow->RootWindow.
716	ImVector<ImGuiColorMod> ColorModifiers; // Stack for PushStyleColor()/PopStyleColor()
717	ImVector<ImGuiStyleMod> StyleModifiers; // Stack for PushStyleVar()/PopStyleVar()
718	ImVector<ImFont*> FontStack; // Stack for PushFont()/PopFont()
719	ImVector<ImGuiPopupRef> OpenPopupStack; // Which popups are open (persistent)
720	ImVector<ImGuiPopupRef> CurrentPopupStack; // Which level of BeginPopup() we are in (reset every frame)
721	ImGuiNextWindowData NextWindowData; // Storage for SetNextWindow** functions
722	bool NextTreeNodeOpenVal; // Storage for SetNextTreeNode** functions
723	ImGuiCond NextTreeNodeOpenCond;
724
725	// Navigation data (for gamepad/keyboard)
726	ImGuiWindow* NavWindow; // Focused window for navigation. Could be called 'FocusWindow'
727	ImGuiID NavId; // Focused item for navigation
728	ImGuiID NavActivateId; // ~~ (g.ActiveId == 0) && IsNavInputPressed(ImGuiNavInput_Activate) ? NavId : 0, also set when calling ActivateItem()
729	ImGuiID NavActivateDownId; // ~~ IsNavInputDown(ImGuiNavInput_Activate) ? NavId : 0
730	ImGuiID NavActivatePressedId; // ~~ IsNavInputPressed(ImGuiNavInput_Activate) ? NavId : 0
731	ImGuiID NavInputId; // ~~ IsNavInputPressed(ImGuiNavInput_Input) ? NavId : 0
732	ImGuiID NavJustTabbedId; // Just tabbed to this id.
733	ImGuiID NavJustMovedToId; // Just navigated to this id (result of a successfully MoveRequest)
734	ImGuiID NavNextActivateId; // Set by ActivateItem(), queued until next frame
735	ImGuiInputSource NavInputSource; // Keyboard or Gamepad mode? THIS WILL ONLY BE None or NavGamepad or NavKeyboard.
736	ImRect NavScoringRectScreen; // Rectangle used for scoring, in screen space. Based of window->DC.NavRefRectRel[], modified for directional navigation scoring.
737	int NavScoringCount; // Metrics for debugging
738	ImGuiWindow* NavWindowingTarget; // When selecting a window (holding Menu+FocusPrev/Next, or equivalent of CTRL-TAB) this window is temporarily displayed front-most.
739	ImGuiWindow* NavWindowingTargetAnim; // Record of last valid NavWindowingTarget until DimBgRatio and NavWindowingHighlightAlpha becomes 0.0f
740	ImGuiWindow* NavWindowingList;
741	float NavWindowingTimer;
742	float NavWindowingHighlightAlpha;
743	bool NavWindowingToggleLayer;
744	int NavLayer; // Layer we are navigating on. For now the system is hard-coded for 0=main contents and 1=menu/title bar, may expose layers later.
745	int NavIdTabCounter; // == NavWindow->DC.FocusIdxTabCounter at time of NavId processing
746	bool NavIdIsAlive; // Nav widget has been seen this frame ~~ NavRefRectRel is valid
747	bool NavMousePosDirty; // When set we will update mouse position if (io.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos) if set (NB: this not enabled by default)
748	bool NavDisableHighlight; // When user starts using mouse, we hide gamepad/keyboard highlight (NB: but they are still available, which is why NavDisableHighlight isn't always != NavDisableMouseHover)
749	bool NavDisableMouseHover; // When user starts using gamepad/keyboard, we hide mouse hovering highlight until mouse is touched again.
750	bool NavAnyRequest; // ~~ NavMoveRequest || NavInitRequest
751	bool NavInitRequest; // Init request for appearing window to select first item
752	bool NavInitRequestFromMove;
753	ImGuiID NavInitResultId;
754	ImRect NavInitResultRectRel;
755	bool NavMoveFromClampedRefRect; // Set by manual scrolling, if we scroll to a point where NavId isn't visible we reset navigation from visible items
756	bool NavMoveRequest; // Move request for this frame
757	ImGuiNavMoveFlags NavMoveRequestFlags;
758	ImGuiNavForward NavMoveRequestForward; // None / ForwardQueued / ForwardActive (this is used to navigate sibling parent menus from a child menu)
759	ImGuiDir NavMoveDir, NavMoveDirLast; // Direction of the move request (left/right/up/down), direction of the previous move request
760	ImGuiDir NavMoveClipDir;
761	ImGuiNavMoveResult NavMoveResultLocal; // Best move request candidate within NavWindow
762	ImGuiNavMoveResult NavMoveResultLocalVisibleSet; // Best move request candidate within NavWindow that are mostly visible (when using ImGuiNavMoveFlags_AlsoScoreVisibleSet flag)
763	ImGuiNavMoveResult NavMoveResultOther; // Best move request candidate within NavWindow's flattened hierarchy (when using ImGuiWindowFlags_NavFlattened flag)
764
765	// Render
766	ImDrawData DrawData; // Main ImDrawData instance to pass render information to the user
767	ImDrawDataBuilder DrawDataBuilder;
768	float DimBgRatio; // 0.0..1.0 animation when fading in a dimming background (for modal window and CTRL+TAB list)
769	ImDrawList OverlayDrawList; // Optional software render of mouse cursors, if io.MouseDrawCursor is set + a few debug overlays
770	ImGuiMouseCursor MouseCursor;
771
772	// Drag and Drop
773	bool DragDropActive;
774	bool DragDropWithinSourceOrTarget;
775	ImGuiDragDropFlags DragDropSourceFlags;
776	int DragDropSourceFrameCount;
777	int DragDropMouseButton;
778	ImGuiPayload DragDropPayload;
779	ImRect DragDropTargetRect;
780	ImGuiID DragDropTargetId;
781	ImGuiDragDropFlags DragDropAcceptFlags;
782	float DragDropAcceptIdCurrRectSurface; // Target item surface (we resolve overlapping targets by prioritizing the smaller surface)
783	ImGuiID DragDropAcceptIdCurr; // Target item id (set at the time of accepting the payload)
784	ImGuiID DragDropAcceptIdPrev; // Target item id from previous frame (we need to store this to allow for overlapping drag and drop targets)
785	int DragDropAcceptFrameCount; // Last time a target expressed a desire to accept the source
786	ImVector<unsigned char> DragDropPayloadBufHeap; // We don't expose the ImVector<> directly
787	unsigned char DragDropPayloadBufLocal[8]; // Local buffer for small payloads
788
789	// Widget state
790	ImGuiInputTextState InputTextState;
791	ImFont InputTextPasswordFont;
792	ImGuiID ScalarAsInputTextId; // Temporary text input when CTRL+clicking on a slider, etc.
793	ImGuiColorEditFlags ColorEditOptions; // Store user options for color edit widgets
794	ImVec4 ColorPickerRef;
795	bool DragCurrentAccumDirty;
796	float DragCurrentAccum; // Accumulator for dragging modification. Always high-precision, not rounded by end-user precision settings
797	float DragSpeedDefaultRatio; // If speed == 0.0f, uses (max-min) * DragSpeedDefaultRatio
798	ImVec2 ScrollbarClickDeltaToGrabCenter; // Distance between mouse and center of grab box, normalized in parent space. Use storage?
799	int TooltipOverrideCount;
800	ImVector<char> PrivateClipboard; // If no custom clipboard handler is defined
801	ImVec2 PlatformImePos, PlatformImeLastPos; // Cursor position request & last passed to the OS Input Method Editor
802
803	// Settings
804	bool SettingsLoaded;
805	float SettingsDirtyTimer; // Save .ini Settings to memory when time reaches zero
806	ImGuiTextBuffer SettingsIniData; // In memory .ini settings
807	ImVector<ImGuiSettingsHandler> SettingsHandlers; // List of .ini settings handlers
808	ImVector<ImGuiWindowSettings> SettingsWindows; // ImGuiWindow .ini settings entries (parsed from the last loaded .ini file and maintained on saving)
809
810	// Logging
811	bool LogEnabled;
812	FILE* LogFile; // If != NULL log to stdout/ file
813	ImGuiTextBuffer LogClipboard; // Accumulation buffer when log to clipboard. This is pointer so our GImGui static constructor doesn't call heap allocators.
814	int LogStartDepth;
815	int LogAutoExpandMaxDepth;
816
817	// Misc
818	float FramerateSecPerFrame[120]; // Calculate estimate of framerate for user over the last 2 seconds.
819	int FramerateSecPerFrameIdx;
820	float FramerateSecPerFrameAccum;
821	int WantCaptureMouseNextFrame; // Explicit capture via CaptureKeyboardFromApp()/CaptureMouseFromApp() sets those flags
822	int WantCaptureKeyboardNextFrame;
823	int WantTextInputNextFrame;
824	char TempBuffer[1024*3+1]; // Temporary text buffer
825
826	ImGuiContext(ImFontAtlas* shared_font_atlas) : OverlayDrawList(NULL)
827	{
828	Initialized = false;
829	FrameScopeActive = false;
830	Font = NULL;
831	FontSize = FontBaseSize = 0.0f;
832	FontAtlasOwnedByContext = shared_font_atlas ? false : true;
833	IO.Fonts = shared_font_atlas ? shared_font_atlas : IM_NEW(ImFontAtlas)();
834
835	Time = 0.0f;
836	FrameCount = 0;
837	FrameCountEnded = FrameCountRendered = -1;
838	WindowsActiveCount = 0;
839	CurrentWindow = NULL;
840	HoveredWindow = NULL;
841	HoveredRootWindow = NULL;
842	HoveredId = 0;
843	HoveredIdAllowOverlap = false;
844	HoveredIdPreviousFrame = 0;
845	HoveredIdTimer = HoveredIdNotActiveTimer = 0.0f;
846	ActiveId = 0;
847	ActiveIdPreviousFrame = 0;
848	ActiveIdIsAlive = 0;
849	ActiveIdTimer = 0.0f;
850	ActiveIdIsJustActivated = false;
851	ActiveIdAllowOverlap = false;
852	ActiveIdHasBeenEdited = false;
853	ActiveIdPreviousFrameIsAlive = false;
854	ActiveIdPreviousFrameHasBeenEdited = false;
855	ActiveIdAllowNavDirFlags = 0;
856	ActiveIdClickOffset = ImVec2(-1,-1);
857	ActiveIdWindow = ActiveIdPreviousFrameWindow = NULL;
858	ActiveIdSource = ImGuiInputSource_None;
859	LastActiveId = 0;
860	LastActiveIdTimer = 0.0f;
861	LastValidMousePos = ImVec2(0.0f, 0.0f);
862	MovingWindow = NULL;
863	NextTreeNodeOpenVal = false;
864	NextTreeNodeOpenCond = 0;
865
866	NavWindow = NULL;
867	NavId = NavActivateId = NavActivateDownId = NavActivatePressedId = NavInputId = 0;
868	NavJustTabbedId = NavJustMovedToId = NavNextActivateId = 0;
869	NavInputSource = ImGuiInputSource_None;
870	NavScoringRectScreen = ImRect();
871	NavScoringCount = 0;
872	NavWindowingTarget = NavWindowingTargetAnim = NavWindowingList = NULL;
873	NavWindowingTimer = NavWindowingHighlightAlpha = 0.0f;
874	NavWindowingToggleLayer = false;
875	NavLayer = 0;
876	NavIdTabCounter = INT_MAX;
877	NavIdIsAlive = false;
878	NavMousePosDirty = false;
879	NavDisableHighlight = true;
880	NavDisableMouseHover = false;
881	NavAnyRequest = false;
882	NavInitRequest = false;
883	NavInitRequestFromMove = false;
884	NavInitResultId = 0;
885	NavMoveFromClampedRefRect = false;
886	NavMoveRequest = false;
887	NavMoveRequestFlags = 0;
888	NavMoveRequestForward = ImGuiNavForward_None;
889	NavMoveDir = NavMoveDirLast = NavMoveClipDir = ImGuiDir_None;
890
891	DimBgRatio = 0.0f;
892	OverlayDrawList._Data = &DrawListSharedData;
893	OverlayDrawList._OwnerName = "##Overlay"; // Give it a name for debugging
894	MouseCursor = ImGuiMouseCursor_Arrow;
895
896	DragDropActive = DragDropWithinSourceOrTarget = false;
897	DragDropSourceFlags = 0;
898	DragDropSourceFrameCount = -1;
899	DragDropMouseButton = -1;
900	DragDropTargetId = 0;
901	DragDropAcceptFlags = 0;
902	DragDropAcceptIdCurrRectSurface = 0.0f;
903	DragDropAcceptIdPrev = DragDropAcceptIdCurr = 0;
904	DragDropAcceptFrameCount = -1;
905	memset(s: DragDropPayloadBufLocal, c: 0, n: sizeof(DragDropPayloadBufLocal));
906
907	ScalarAsInputTextId = 0;
908	ColorEditOptions = ImGuiColorEditFlags__OptionsDefault;
909	DragCurrentAccumDirty = false;
910	DragCurrentAccum = 0.0f;
911	DragSpeedDefaultRatio = 1.0f / 100.0f;
912	ScrollbarClickDeltaToGrabCenter = ImVec2(0.0f, 0.0f);
913	TooltipOverrideCount = 0;
914	PlatformImePos = PlatformImeLastPos = ImVec2(FLT_MAX, FLT_MAX);
915
916	SettingsLoaded = false;
917	SettingsDirtyTimer = 0.0f;
918
919	LogEnabled = false;
920	LogFile = NULL;
921	LogStartDepth = 0;
922	LogAutoExpandMaxDepth = 2;
923
924	memset(s: FramerateSecPerFrame, c: 0, n: sizeof(FramerateSecPerFrame));
925	FramerateSecPerFrameIdx = 0;
926	FramerateSecPerFrameAccum = 0.0f;
927	WantCaptureMouseNextFrame = WantCaptureKeyboardNextFrame = WantTextInputNextFrame = -1;
928	memset(s: TempBuffer, c: 0, n: sizeof(TempBuffer));
929	}
930	};
931
932	// Transient per-window flags, reset at the beginning of the frame. For child window, inherited from parent on first Begin().
933	// This is going to be exposed in imgui.h when stabilized enough.
934	enum ImGuiItemFlags_
935	{
936	ImGuiItemFlags_NoTabStop = 1 << 0, // false
937	ImGuiItemFlags_ButtonRepeat = 1 << 1, // false // Button() will return true multiple times based on io.KeyRepeatDelay and io.KeyRepeatRate settings.
938	ImGuiItemFlags_Disabled = 1 << 2, // false // [BETA] Disable interactions but doesn't affect visuals yet. See github.com/ocornut/imgui/issues/211
939	ImGuiItemFlags_NoNav = 1 << 3, // false
940	ImGuiItemFlags_NoNavDefaultFocus = 1 << 4, // false
941	ImGuiItemFlags_SelectableDontClosePopup = 1 << 5, // false // MenuItem/Selectable() automatically closes current Popup window
942	ImGuiItemFlags_Default_ = 0
943	};
944
945	// Transient per-window data, reset at the beginning of the frame. This used to be called ImGuiDrawContext, hence the DC variable name in ImGuiWindow.
946	// FIXME: That's theory, in practice the delimitation between ImGuiWindow and ImGuiWindowTempData is quite tenuous and could be reconsidered.
947	struct IMGUI_API ImGuiWindowTempData
948	{
949	ImVec2 CursorPos;
950	ImVec2 CursorPosPrevLine;
951	ImVec2 CursorStartPos; // Initial position in client area with padding
952	ImVec2 CursorMaxPos; // Used to implicitly calculate the size of our contents, always growing during the frame. Turned into window->SizeContents at the beginning of next frame
953	ImVec2 CurrentLineSize;
954	float CurrentLineTextBaseOffset;
955	ImVec2 PrevLineSize;
956	float PrevLineTextBaseOffset;
957	float LogLinePosY;
958	int TreeDepth;
959	ImU32 TreeDepthMayJumpToParentOnPop; // Store a copy of !g.NavIdIsAlive for TreeDepth 0..31
960	ImGuiID LastItemId;
961	ImGuiItemStatusFlags LastItemStatusFlags;
962	ImRect LastItemRect; // Interaction rect
963	ImRect LastItemDisplayRect; // End-user display rect (only valid if LastItemStatusFlags & ImGuiItemStatusFlags_HasDisplayRect)
964	bool NavHideHighlightOneFrame;
965	bool NavHasScroll; // Set when scrolling can be used (ScrollMax > 0.0f)
966	int NavLayerCurrent; // Current layer, 0..31 (we currently only use 0..1)
967	int NavLayerCurrentMask; // = (1 << NavLayerCurrent) used by ItemAdd prior to clipping.
968	int NavLayerActiveMask; // Which layer have been written to (result from previous frame)
969	int NavLayerActiveMaskNext; // Which layer have been written to (buffer for current frame)
970	bool MenuBarAppending; // FIXME: Remove this
971	ImVec2 MenuBarOffset; // MenuBarOffset.x is sort of equivalent of a per-layer CursorPos.x, saved/restored as we switch to the menu bar. The only situation when MenuBarOffset.y is > 0 if when (SafeAreaPadding.y > FramePadding.y), often used on TVs.
972	ImVector<ImGuiWindow*> ChildWindows;
973	ImGuiStorage* StateStorage;
974	ImGuiLayoutType LayoutType;
975	ImGuiLayoutType ParentLayoutType; // Layout type of parent window at the time of Begin()
976
977	// We store the current settings outside of the vectors to increase memory locality (reduce cache misses). The vectors are rarely modified. Also it allows us to not heap allocate for short-lived windows which are not using those settings.
978	ImGuiItemFlags ItemFlags; // == ItemFlagsStack.back() [empty == ImGuiItemFlags_Default]
979	float ItemWidth; // == ItemWidthStack.back(). 0.0: default, >0.0: width in pixels, <0.0: align xx pixels to the right of window
980	float TextWrapPos; // == TextWrapPosStack.back() [empty == -1.0f]
981	ImVector<ImGuiItemFlags>ItemFlagsStack;
982	ImVector<float> ItemWidthStack;
983	ImVector<float> TextWrapPosStack;
984	ImVector<ImGuiGroupData>GroupStack;
985	int StackSizesBackup[6]; // Store size of various stacks for asserting
986
987	ImVec1 Indent; // Indentation / start position from left of window (increased by TreePush/TreePop, etc.)
988	ImVec1 GroupOffset;
989	ImVec1 ColumnsOffset; // Offset to the current column (if ColumnsCurrent > 0). FIXME: This and the above should be a stack to allow use cases like Tree->Column->Tree. Need revamp columns API.
990	ImGuiColumnsSet* ColumnsSet; // Current columns set
991
992	ImGuiWindowTempData()
993	{
994	CursorPos = CursorPosPrevLine = CursorStartPos = CursorMaxPos = ImVec2(0.0f, 0.0f);
995	CurrentLineSize = PrevLineSize = ImVec2(0.0f, 0.0f);
996	CurrentLineTextBaseOffset = PrevLineTextBaseOffset = 0.0f;
997	LogLinePosY = -1.0f;
998	TreeDepth = 0;
999	TreeDepthMayJumpToParentOnPop = 0x00;
1000	LastItemId = 0;
1001	LastItemStatusFlags = 0;
1002	LastItemRect = LastItemDisplayRect = ImRect();
1003	NavHideHighlightOneFrame = false;
1004	NavHasScroll = false;
1005	NavLayerActiveMask = NavLayerActiveMaskNext = 0x00;
1006	NavLayerCurrent = 0;
1007	NavLayerCurrentMask = 1 << 0;
1008	MenuBarAppending = false;
1009	MenuBarOffset = ImVec2(0.0f, 0.0f);
1010	StateStorage = NULL;
1011	LayoutType = ParentLayoutType = ImGuiLayoutType_Vertical;
1012	ItemWidth = 0.0f;
1013	ItemFlags = ImGuiItemFlags_Default_;
1014	TextWrapPos = -1.0f;
1015	memset(s: StackSizesBackup, c: 0, n: sizeof(StackSizesBackup));
1016
1017	Indent = ImVec1(0.0f);
1018	GroupOffset = ImVec1(0.0f);
1019	ColumnsOffset = ImVec1(0.0f);
1020	ColumnsSet = NULL;
1021	}
1022	};
1023
1024	// Storage for one window
1025	struct IMGUI_API ImGuiWindow
1026	{
1027	char* Name;
1028	ImGuiID ID; // == ImHash(Name)
1029	ImGuiWindowFlags Flags; // See enum ImGuiWindowFlags_
1030	ImVec2 Pos; // Position (always rounded-up to nearest pixel)
1031	ImVec2 Size; // Current size (==SizeFull or collapsed title bar size)
1032	ImVec2 SizeFull; // Size when non collapsed
1033	ImVec2 SizeFullAtLastBegin; // Copy of SizeFull at the end of Begin. This is the reference value we'll use on the next frame to decide if we need scrollbars.
1034	ImVec2 SizeContents; // Size of contents (== extents reach of the drawing cursor) from previous frame. Include decoration, window title, border, menu, etc.
1035	ImVec2 SizeContentsExplicit; // Size of contents explicitly set by the user via SetNextWindowContentSize()
1036	ImVec2 WindowPadding; // Window padding at the time of begin.
1037	float WindowRounding; // Window rounding at the time of begin.
1038	float WindowBorderSize; // Window border size at the time of begin.
1039	ImGuiID MoveId; // == window->GetID("#MOVE")
1040	ImGuiID ChildId; // ID of corresponding item in parent window (for navigation to return from child window to parent window)
1041	ImVec2 Scroll;
1042	ImVec2 ScrollTarget; // target scroll position. stored as cursor position with scrolling canceled out, so the highest point is always 0.0f. (FLT_MAX for no change)
1043	ImVec2 ScrollTargetCenterRatio; // 0.0f = scroll so that target position is at top, 0.5f = scroll so that target position is centered
1044	ImVec2 ScrollbarSizes; // Size taken by scrollbars on each axis
1045	bool ScrollbarX, ScrollbarY;
1046	bool Active; // Set to true on Begin(), unless Collapsed
1047	bool WasActive;
1048	bool WriteAccessed; // Set to true when any widget access the current window
1049	bool Collapsed; // Set when collapsing window to become only title-bar
1050	bool WantCollapseToggle;
1051	bool SkipItems; // Set when items can safely be all clipped (e.g. window not visible or collapsed)
1052	bool Appearing; // Set during the frame where the window is appearing (or re-appearing)
1053	bool Hidden; // Do not display (== (HiddenFramesForResize > 0) ||
1054	bool HasCloseButton; // Set when the window has a close button (p_open != NULL)
1055	int BeginCount; // Number of Begin() during the current frame (generally 0 or 1, 1+ if appending via multiple Begin/End pairs)
1056	int BeginOrderWithinParent; // Order within immediate parent window, if we are a child window. Otherwise 0.
1057	int BeginOrderWithinContext; // Order within entire imgui context. This is mostly used for debugging submission order related issues.
1058	ImGuiID PopupId; // ID in the popup stack when this window is used as a popup/menu (because we use generic Name/ID for recycling)
1059	int AutoFitFramesX, AutoFitFramesY;
1060	bool AutoFitOnlyGrows;
1061	int AutoFitChildAxises;
1062	ImGuiDir AutoPosLastDirection;
1063	int HiddenFramesRegular; // Hide the window for N frames
1064	int HiddenFramesForResize; // Hide the window for N frames while allowing items to be submitted so we can measure their size
1065	ImGuiCond SetWindowPosAllowFlags; // store acceptable condition flags for SetNextWindowPos() use.
1066	ImGuiCond SetWindowSizeAllowFlags; // store acceptable condition flags for SetNextWindowSize() use.
1067	ImGuiCond SetWindowCollapsedAllowFlags; // store acceptable condition flags for SetNextWindowCollapsed() use.
1068	ImVec2 SetWindowPosVal; // store window position when using a non-zero Pivot (position set needs to be processed when we know the window size)
1069	ImVec2 SetWindowPosPivot; // store window pivot for positioning. ImVec2(0,0) when positioning from top-left corner; ImVec2(0.5f,0.5f) for centering; ImVec2(1,1) for bottom right.
1070
1071	ImGuiWindowTempData DC; // Temporary per-window data, reset at the beginning of the frame. This used to be called ImGuiDrawContext, hence the "DC" variable name.
1072	ImVector<ImGuiID> IDStack; // ID stack. ID are hashes seeded with the value at the top of the stack
1073	ImRect ClipRect; // Current clipping rectangle. = DrawList->clip_rect_stack.back(). Scissoring / clipping rectangle. x1, y1, x2, y2.
1074	ImRect OuterRectClipped; // = WindowRect just after setup in Begin(). == window->Rect() for root window.
1075	ImRect InnerMainRect, InnerClipRect;
1076	ImRect ContentsRegionRect; // FIXME: This is currently confusing/misleading. Maximum visible content position ~~ Pos + (SizeContentsExplicit ? SizeContentsExplicit : Size - ScrollbarSizes) - CursorStartPos, per axis
1077	int LastFrameActive; // Last frame number the window was Active.
1078	float ItemWidthDefault;
1079	ImGuiMenuColumns MenuColumns; // Simplified columns storage for menu items
1080	ImGuiStorage StateStorage;
1081	ImVector<ImGuiColumnsSet> ColumnsStorage;
1082	float FontWindowScale; // User scale multiplier per-window
1083	int SettingsIdx; // Index into SettingsWindow[] (indices are always valid as we only grow the array from the back)
1084
1085	ImDrawList* DrawList; // == &DrawListInst (for backward compatibility reason with code using imgui_internal.h we keep this a pointer)
1086	ImDrawList DrawListInst;
1087	ImGuiWindow* ParentWindow; // If we are a child _or_ popup window, this is pointing to our parent. Otherwise NULL.
1088	ImGuiWindow* RootWindow; // Point to ourself or first ancestor that is not a child window.
1089	ImGuiWindow* RootWindowForTitleBarHighlight; // Point to ourself or first ancestor which will display TitleBgActive color when this window is active.
1090	ImGuiWindow* RootWindowForNav; // Point to ourself or first ancestor which doesn't have the NavFlattened flag.
1091
1092	ImGuiWindow* NavLastChildNavWindow; // When going to the menu bar, we remember the child window we came from. (This could probably be made implicit if we kept g.Windows sorted by last focused including child window.)
1093	ImGuiID NavLastIds[2]; // Last known NavId for this window, per layer (0/1)
1094	ImRect NavRectRel[2]; // Reference rectangle, in window relative space
1095
1096	// Navigation / Focus
1097	// FIXME-NAV: Merge all this with the new Nav system, at least the request variables should be moved to ImGuiContext
1098	int FocusIdxAllCounter; // Start at -1 and increase as assigned via FocusItemRegister()
1099	int FocusIdxTabCounter; // (same, but only count widgets which you can Tab through)
1100	int FocusIdxAllRequestCurrent; // Item being requested for focus
1101	int FocusIdxTabRequestCurrent; // Tab-able item being requested for focus
1102	int FocusIdxAllRequestNext; // Item being requested for focus, for next update (relies on layout to be stable between the frame pressing TAB and the next frame)
1103	int FocusIdxTabRequestNext; // "
1104
1105	public:
1106	ImGuiWindow(ImGuiContext* context, const char* name);
1107	~ImGuiWindow();
1108
1109	ImGuiID GetID(const char* str, const char* str_end = NULL);
1110	ImGuiID GetID(const void* ptr);
1111	ImGuiID GetIDNoKeepAlive(const char* str, const char* str_end = NULL);
1112	ImGuiID GetIDNoKeepAlive(const void* ptr);
1113	ImGuiID GetIDFromRectangle(const ImRect& r_abs);
1114
1115	// We don't use g.FontSize because the window may be != g.CurrentWidow.
1116	ImRect Rect() const { return ImRect(Pos.x, Pos.y, Pos.x+Size.x, Pos.y+Size.y); }
1117	float CalcFontSize() const { return GImGui->FontBaseSize * FontWindowScale; }
1118	float TitleBarHeight() const { return (Flags & ImGuiWindowFlags_NoTitleBar) ? 0.0f : CalcFontSize() + GImGui->Style.FramePadding.y * 2.0f; }
1119	ImRect TitleBarRect() const { return ImRect(Pos, ImVec2(Pos.x + SizeFull.x, Pos.y + TitleBarHeight())); }
1120	float MenuBarHeight() const { return (Flags & ImGuiWindowFlags_MenuBar) ? DC.MenuBarOffset.y + CalcFontSize() + GImGui->Style.FramePadding.y * 2.0f : 0.0f; }
1121	ImRect MenuBarRect() const { float y1 = Pos.y + TitleBarHeight(); return ImRect(Pos.x, y1, Pos.x + SizeFull.x, y1 + MenuBarHeight()); }
1122	};
1123
1124	// Backup and restore just enough data to be able to use IsItemHovered() on item A after another B in the same window has overwritten the data.
1125	struct ImGuiItemHoveredDataBackup
1126	{
1127	ImGuiID LastItemId;
1128	ImGuiItemStatusFlags LastItemStatusFlags;
1129	ImRect LastItemRect;
1130	ImRect LastItemDisplayRect;
1131
1132	ImGuiItemHoveredDataBackup() { Backup(); }
1133	void Backup() { ImGuiWindow* window = GImGui->CurrentWindow; LastItemId = window->DC.LastItemId; LastItemStatusFlags = window->DC.LastItemStatusFlags; LastItemRect = window->DC.LastItemRect; LastItemDisplayRect = window->DC.LastItemDisplayRect; }
1134	void Restore() const { ImGuiWindow* window = GImGui->CurrentWindow; window->DC.LastItemId = LastItemId; window->DC.LastItemStatusFlags = LastItemStatusFlags; window->DC.LastItemRect = LastItemRect; window->DC.LastItemDisplayRect = LastItemDisplayRect; }
1135	};
1136
1137	//-----------------------------------------------------------------------------
1138	// Internal API
1139	// No guarantee of forward compatibility here.
1140	//-----------------------------------------------------------------------------
1141
1142	namespace ImGui
1143	{
1144	// We should always have a CurrentWindow in the stack (there is an implicit "Debug" window)
1145	// If this ever crash because g.CurrentWindow is NULL it means that either
1146	// - ImGui::NewFrame() has never been called, which is illegal.
1147	// - You are calling ImGui functions after ImGui::EndFrame()/ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
1148	inline ImGuiWindow* GetCurrentWindowRead() { ImGuiContext& g = *GImGui; return g.CurrentWindow; }
1149	inline ImGuiWindow* GetCurrentWindow() { ImGuiContext& g = *GImGui; g.CurrentWindow->WriteAccessed = true; return g.CurrentWindow; }
1150	IMGUI_API ImGuiWindow* FindWindowByID(ImGuiID id);
1151	IMGUI_API ImGuiWindow* FindWindowByName(const char* name);
1152	IMGUI_API void FocusWindow(ImGuiWindow* window);
1153	IMGUI_API void FocusPreviousWindowIgnoringOne(ImGuiWindow* ignore_window);
1154	IMGUI_API void BringWindowToFocusFront(ImGuiWindow* window);
1155	IMGUI_API void BringWindowToDisplayFront(ImGuiWindow* window);
1156	IMGUI_API void BringWindowToDisplayBack(ImGuiWindow* window);
1157	IMGUI_API void UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags flags, ImGuiWindow* parent_window);
1158	IMGUI_API ImVec2 CalcWindowExpectedSize(ImGuiWindow* window);
1159	IMGUI_API bool IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent);
1160	IMGUI_API bool IsWindowNavFocusable(ImGuiWindow* window);
1161	IMGUI_API void SetWindowScrollX(ImGuiWindow* window, float new_scroll_x);
1162	IMGUI_API void SetWindowScrollY(ImGuiWindow* window, float new_scroll_y);
1163	IMGUI_API float GetWindowScrollMaxX(ImGuiWindow* window);
1164	IMGUI_API float GetWindowScrollMaxY(ImGuiWindow* window);
1165	IMGUI_API ImRect GetWindowAllowedExtentRect(ImGuiWindow* window);
1166	IMGUI_API void SetCurrentFont(ImFont* font);
1167	inline ImFont* GetDefaultFont() { ImGuiContext& g = *GImGui; return g.IO.FontDefault ? g.IO.FontDefault : g.IO.Fonts->Fonts[0]; }
1168
1169	// Init
1170	IMGUI_API void Initialize(ImGuiContext* context);
1171	IMGUI_API void Shutdown(ImGuiContext* context); // Since 1.60 this is a _private_ function. You can call DestroyContext() to destroy the context created by CreateContext().
1172
1173	// NewFrame
1174	IMGUI_API void UpdateHoveredWindowAndCaptureFlags();
1175	IMGUI_API void StartMouseMovingWindow(ImGuiWindow* window);
1176	IMGUI_API void UpdateMouseMovingWindow();
1177
1178	// Settings
1179	IMGUI_API void MarkIniSettingsDirty();
1180	IMGUI_API void MarkIniSettingsDirty(ImGuiWindow* window);
1181	IMGUI_API ImGuiWindowSettings* CreateNewWindowSettings(const char* name);
1182	IMGUI_API ImGuiWindowSettings* FindWindowSettings(ImGuiID id);
1183	IMGUI_API ImGuiSettingsHandler* FindSettingsHandler(const char* type_name);
1184
1185	// Basic Accessors
1186	inline ImGuiID GetItemID() { ImGuiContext& g = *GImGui; return g.CurrentWindow->DC.LastItemId; }
1187	inline ImGuiID GetActiveID() { ImGuiContext& g = *GImGui; return g.ActiveId; }
1188	inline ImGuiID GetFocusID() { ImGuiContext& g = *GImGui; return g.NavId; }
1189	IMGUI_API void SetActiveID(ImGuiID id, ImGuiWindow* window);
1190	IMGUI_API void SetFocusID(ImGuiID id, ImGuiWindow* window);
1191	IMGUI_API void ClearActiveID();
1192	IMGUI_API ImGuiID GetHoveredID();
1193	IMGUI_API void SetHoveredID(ImGuiID id);
1194	IMGUI_API void KeepAliveID(ImGuiID id);
1195	IMGUI_API void MarkItemEdited(ImGuiID id);
1196
1197	// Basic Helpers for widget code
1198	IMGUI_API void ItemSize(const ImVec2& size, float text_offset_y = 0.0f);
1199	IMGUI_API void ItemSize(const ImRect& bb, float text_offset_y = 0.0f);
1200	IMGUI_API bool ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb = NULL);
1201	IMGUI_API bool ItemHoverable(const ImRect& bb, ImGuiID id);
1202	IMGUI_API bool IsClippedEx(const ImRect& bb, ImGuiID id, bool clip_even_when_logged);
1203	IMGUI_API bool FocusableItemRegister(ImGuiWindow* window, ImGuiID id, bool tab_stop = true); // Return true if focus is requested
1204	IMGUI_API void FocusableItemUnregister(ImGuiWindow* window);
1205	IMGUI_API ImVec2 CalcItemSize(ImVec2 size, float default_x, float default_y);
1206	IMGUI_API float CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x);
1207	IMGUI_API void PushMultiItemsWidths(int components, float width_full = 0.0f);
1208	IMGUI_API void PushItemFlag(ImGuiItemFlags option, bool enabled);
1209	IMGUI_API void PopItemFlag();
1210
1211	// Popups, Modals, Tooltips
1212	IMGUI_API void OpenPopupEx(ImGuiID id);
1213	IMGUI_API void ClosePopup(ImGuiID id);
1214	IMGUI_API void ClosePopupToLevel(int remaining);
1215	IMGUI_API void ClosePopupsOverWindow(ImGuiWindow* ref_window);
1216	IMGUI_API bool IsPopupOpen(ImGuiID id);
1217	IMGUI_API bool BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_flags);
1218	IMGUI_API void BeginTooltipEx(ImGuiWindowFlags extra_flags, bool override_previous_tooltip = true);
1219	IMGUI_API ImGuiWindow* GetFrontMostPopupModal();
1220	IMGUI_API ImVec2 FindBestWindowPosForPopup(ImGuiWindow* window);
1221	IMGUI_API ImVec2 FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy = ImGuiPopupPositionPolicy_Default);
1222
1223	// Navigation
1224	IMGUI_API void NavInitWindow(ImGuiWindow* window, bool force_reinit);
1225	IMGUI_API bool NavMoveRequestButNoResultYet();
1226	IMGUI_API void NavMoveRequestCancel();
1227	IMGUI_API void NavMoveRequestForward(ImGuiDir move_dir, ImGuiDir clip_dir, const ImRect& bb_rel, ImGuiNavMoveFlags move_flags);
1228	IMGUI_API void NavMoveRequestTryWrapping(ImGuiWindow* window, ImGuiNavMoveFlags move_flags);
1229	IMGUI_API float GetNavInputAmount(ImGuiNavInput n, ImGuiInputReadMode mode);
1230	IMGUI_API ImVec2 GetNavInputAmount2d(ImGuiNavDirSourceFlags dir_sources, ImGuiInputReadMode mode, float slow_factor = 0.0f, float fast_factor = 0.0f);
1231	IMGUI_API int CalcTypematicPressedRepeatAmount(float t, float t_prev, float repeat_delay, float repeat_rate);
1232	IMGUI_API void ActivateItem(ImGuiID id); // Remotely activate a button, checkbox, tree node etc. given its unique ID. activation is queued and processed on the next frame when the item is encountered again.
1233	IMGUI_API void SetNavID(ImGuiID id, int nav_layer);
1234	IMGUI_API void SetNavIDWithRectRel(ImGuiID id, int nav_layer, const ImRect& rect_rel);
1235
1236	// Inputs
1237	inline bool IsKeyPressedMap(ImGuiKey key, bool repeat = true) { const int key_index = GImGui->IO.KeyMap[key]; return (key_index >= 0) ? IsKeyPressed(user_key_index: key_index, repeat) : false; }
1238	inline bool IsNavInputDown(ImGuiNavInput n) { return GImGui->IO.NavInputs[n] > 0.0f; }
1239	inline bool IsNavInputPressed(ImGuiNavInput n, ImGuiInputReadMode mode) { return GetNavInputAmount(n, mode) > 0.0f; }
1240	inline bool IsNavInputPressedAnyOfTwo(ImGuiNavInput n1, ImGuiNavInput n2, ImGuiInputReadMode mode) { return (GetNavInputAmount(n: n1, mode) + GetNavInputAmount(n: n2, mode)) > 0.0f; }
1241
1242	// Drag and Drop
1243	IMGUI_API bool BeginDragDropTargetCustom(const ImRect& bb, ImGuiID id);
1244	IMGUI_API void ClearDragDrop();
1245	IMGUI_API bool IsDragDropPayloadBeingAccepted();
1246
1247	// New Columns API (FIXME-WIP)
1248	IMGUI_API void BeginColumns(const char* str_id, int count, ImGuiColumnsFlags flags = 0); // setup number of columns. use an identifier to distinguish multiple column sets. close with EndColumns().
1249	IMGUI_API void EndColumns(); // close columns
1250	IMGUI_API void PushColumnClipRect(int column_index = -1);
1251
1252	// Render helpers
1253	// AVOID USING OUTSIDE OF IMGUI.CPP! NOT FOR PUBLIC CONSUMPTION. THOSE FUNCTIONS ARE A MESS. THEIR SIGNATURE AND BEHAVIOR WILL CHANGE, THEY NEED TO BE REFACTORED INTO SOMETHING DECENT.
1254	// NB: All position are in absolute pixels coordinates (we are never using window coordinates internally)
1255	IMGUI_API void RenderText(ImVec2 pos, const char* text, const char* text_end = NULL, bool hide_text_after_hash = true);
1256	IMGUI_API void RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width);
1257	IMGUI_API void RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0,0), const ImRect* clip_rect = NULL);
1258	IMGUI_API void RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border = true, float rounding = 0.0f);
1259	IMGUI_API void RenderFrameBorder(ImVec2 p_min, ImVec2 p_max, float rounding = 0.0f);
1260	IMGUI_API void RenderColorRectWithAlphaCheckerboard(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, float grid_step, ImVec2 grid_off, float rounding = 0.0f, int rounding_corners_flags = ~0);
1261	IMGUI_API void RenderArrow(ImVec2 pos, ImGuiDir dir, float scale = 1.0f);
1262	IMGUI_API void RenderBullet(ImVec2 pos);
1263	IMGUI_API void RenderCheckMark(ImVec2 pos, ImU32 col, float sz);
1264	IMGUI_API void RenderNavHighlight(const ImRect& bb, ImGuiID id, ImGuiNavHighlightFlags flags = ImGuiNavHighlightFlags_TypeDefault); // Navigation highlight
1265	IMGUI_API const char* FindRenderedTextEnd(const char* text, const char* text_end = NULL); // Find the optional ## from which we stop displaying text.
1266	IMGUI_API void LogRenderedText(const ImVec2* ref_pos, const char* text, const char* text_end = NULL);
1267
1268	// Render helpers (those functions don't access any ImGui state!)
1269	IMGUI_API void RenderMouseCursor(ImDrawList* draw_list, ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor = ImGuiMouseCursor_Arrow);
1270	IMGUI_API void RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col);
1271	IMGUI_API void RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
1272
1273	// Widgets
1274	IMGUI_API bool ButtonEx(const char* label, const ImVec2& size_arg = ImVec2(0,0), ImGuiButtonFlags flags = 0);
1275	IMGUI_API bool CloseButton(ImGuiID id, const ImVec2& pos, float radius);
1276	IMGUI_API bool CollapseButton(ImGuiID id, const ImVec2& pos);
1277	IMGUI_API bool ArrowButtonEx(const char* str_id, ImGuiDir dir, ImVec2 size_arg, ImGuiButtonFlags flags);
1278	IMGUI_API void Scrollbar(ImGuiLayoutType direction);
1279	IMGUI_API void VerticalSeparator(); // Vertical separator, for menu bars (use current line height). Not exposed because it is misleading and it doesn't have an effect on regular layout.
1280
1281	// Widgets low-level behaviors
1282	IMGUI_API bool ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
1283	IMGUI_API bool DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power, ImGuiDragFlags flags);
1284	IMGUI_API bool SliderBehavior(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, void* v, const void* v_min, const void* v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
1285	IMGUI_API bool SplitterBehavior(const ImRect& bb, ImGuiID id, ImGuiAxis axis, float* size1, float* size2, float min_size1, float min_size2, float hover_extend = 0.0f, float hover_visibility_delay = 0.0f);
1286	IMGUI_API bool TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* label, const char* label_end = NULL);
1287	IMGUI_API bool TreeNodeBehaviorIsOpen(ImGuiID id, ImGuiTreeNodeFlags flags = 0); // Consume previous SetNextTreeNodeOpened() data, if any. May return true when logging
1288	IMGUI_API void TreePushRawID(ImGuiID id);
1289
1290	// Template functions are instantiated in imgui_widgets.cpp for a finite number of types.
1291	// To use them externally (for custom widget) you may need an "extern template" statement in your code in order to link to existing instances and silence Clang warnings (see #2036).
1292	// e.g. " extern template IMGUI_API float RoundScalarWithFormatT<float, float>(const char* format, ImGuiDataType data_type, float v); "
1293	template<typename T, typename SIGNED_T, typename FLOAT_T> IMGUI_API bool DragBehaviorT(ImGuiDataType data_type, T* v, float v_speed, const T v_min, const T v_max, const char* format, float power, ImGuiDragFlags flags);
1294	template<typename T, typename SIGNED_T, typename FLOAT_T> IMGUI_API bool SliderBehaviorT(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, T* v, const T v_min, const T v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
1295	template<typename T, typename FLOAT_T> IMGUI_API float SliderCalcRatioFromValueT(ImGuiDataType data_type, T v, T v_min, T v_max, float power, float linear_zero_pos);
1296	template<typename T, typename SIGNED_T> IMGUI_API T RoundScalarWithFormatT(const char* format, ImGuiDataType data_type, T v);
1297
1298	// InputText
1299	IMGUI_API bool InputTextEx(const char* label, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
1300	IMGUI_API bool InputScalarAsWidgetReplacement(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* data_ptr, const char* format);
1301
1302	// Color
1303	IMGUI_API void ColorTooltip(const char* text, const float* col, ImGuiColorEditFlags flags);
1304	IMGUI_API void ColorEditOptionsPopup(const float* col, ImGuiColorEditFlags flags);
1305	IMGUI_API void ColorPickerOptionsPopup(const float* ref_col, ImGuiColorEditFlags flags);
1306
1307	// Plot
1308	IMGUI_API void PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 graph_size);
1309
1310	// Shade functions (write over already created vertices)
1311	IMGUI_API void ShadeVertsLinearColorGradientKeepAlpha(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);
1312	IMGUI_API void ShadeVertsLinearUV(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp);
1313
1314	} // namespace ImGui
1315
1316	// ImFontAtlas internals
1317	IMGUI_API bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas);
1318	IMGUI_API void ImFontAtlasBuildRegisterDefaultCustomRects(ImFontAtlas* atlas);
1319	IMGUI_API void ImFontAtlasBuildSetupFont(ImFontAtlas* atlas, ImFont* font, ImFontConfig* font_config, float ascent, float descent);
1320	IMGUI_API void ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* spc);
1321	IMGUI_API void ImFontAtlasBuildFinish(ImFontAtlas* atlas);
1322	IMGUI_API void ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_multiply_factor);
1323	IMGUI_API void ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table[256], unsigned char* pixels, int x, int y, int w, int h, int stride);
1324
1325	#ifdef __clang__
1326	#pragma clang diagnostic pop
1327	#endif
1328
1329	#ifdef _MSC_VER
1330	#pragma warning (pop)
1331	#endif
1332