1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the demonstration applications of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50
51#ifndef SCENE_H
52#define SCENE_H
53
54#include "glbuffers.h"
55#include "glextensions.h"
56#include "gltrianglemesh.h"
57#include "qtbox.h"
58#include "roundedbox.h"
59#include "trackball.h"
60
61QT_BEGIN_NAMESPACE
62class QMatrix4x4;
63QT_END_NAMESPACE
64
65class ParameterEdit : public QWidget
66{
67public:
68 virtual void emitChange() = 0;
69};
70
71class ColorEdit : public ParameterEdit
72{
73 Q_OBJECT
74public:
75 ColorEdit(QRgb initialColor, int id);
76 QRgb color() const {return m_color;}
77 void emitChange() override { emit colorChanged(color: m_color, id: m_id); }
78public slots:
79 void editDone();
80signals:
81 void colorChanged(QRgb color, int id);
82protected:
83 void mousePressEvent(QMouseEvent *event) override;
84 void setColor(QRgb color); // also emits colorChanged()
85private:
86 QGraphicsScene *m_dialogParentScene;
87 QLineEdit *m_lineEdit;
88 QFrame *m_button;
89 QRgb m_color;
90 int m_id;
91};
92
93class FloatEdit : public ParameterEdit
94{
95 Q_OBJECT
96public:
97 FloatEdit(float initialValue, int id);
98 float value() const {return m_value;}
99 void emitChange() override { emit valueChanged(value: m_value, id: m_id); }
100public slots:
101 void editDone();
102signals:
103 void valueChanged(float value, int id);
104private:
105 QGraphicsScene *m_dialogParentScene;
106 QLineEdit *m_lineEdit;
107 float m_value;
108 int m_id;
109};
110
111class GraphicsWidget : public QGraphicsProxyWidget
112{
113public:
114 GraphicsWidget() : QGraphicsProxyWidget(nullptr, Qt::Window) {}
115protected:
116 QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
117 void resizeEvent(QGraphicsSceneResizeEvent *event) override;
118 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
119};
120
121class TwoSidedGraphicsWidget : public QObject
122{
123 Q_OBJECT
124public:
125 using QObject::QObject;
126 void setWidget(int index, QWidget *widget);
127 QWidget *widget(int index);
128public slots:
129 void flip();
130protected slots:
131 void animateFlip();
132private:
133 GraphicsWidget *m_proxyWidgets[2] = {nullptr, nullptr};
134 int m_current = 0;
135 int m_angle = 0; // angle in degrees
136 int m_delta = 0;
137};
138
139class RenderOptionsDialog : public QDialog
140{
141 Q_OBJECT
142public:
143 RenderOptionsDialog();
144 int addTexture(const QString &name);
145 int addShader(const QString &name);
146 void emitParameterChanged();
147protected slots:
148 void setColorParameter(QRgb color, int id);
149 void setFloatParameter(float value, int id);
150signals:
151 void dynamicCubemapToggled(int);
152 void colorParameterChanged(const QString &, QRgb);
153 void floatParameterChanged(const QString &, float);
154 void textureChanged(int);
155 void shaderChanged(int);
156 void doubleClicked();
157protected:
158 void mouseDoubleClickEvent(QMouseEvent *event) override;
159
160 QVector<QByteArray> m_parameterNames;
161 QComboBox *m_textureCombo;
162 QComboBox *m_shaderCombo;
163 QVector<ParameterEdit *> m_parameterEdits;
164};
165
166class ItemDialog : public QDialog
167{
168 Q_OBJECT
169public:
170 enum ItemType {
171 QtBoxItem,
172 CircleItem,
173 SquareItem,
174 };
175
176 ItemDialog();
177public slots:
178 void triggerNewQtBox();
179 void triggerNewCircleItem();
180 void triggerNewSquareItem();
181signals:
182 void doubleClicked();
183 void newItemTriggered(ItemDialog::ItemType type);
184protected:
185 void mouseDoubleClickEvent(QMouseEvent *event) override;
186};
187
188class Scene : public QGraphicsScene
189{
190 Q_OBJECT
191public:
192 Scene(int width, int height, int maxTextureSize);
193 ~Scene();
194 void drawBackground(QPainter *painter, const QRectF &rect) override;
195
196public slots:
197 void setShader(int index);
198 void setTexture(int index);
199 void toggleDynamicCubemap(int state);
200 void setColorParameter(const QString &name, QRgb color);
201 void setFloatParameter(const QString &name, float value);
202 void newItem(ItemDialog::ItemType type);
203protected:
204 void renderBoxes(const QMatrix4x4 &view, int excludeBox = -2);
205 void setStates();
206 void setLights();
207 void defaultStates();
208 void renderCubemaps();
209
210 void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
211 void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
212 void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
213 void wheelEvent(QGraphicsSceneWheelEvent * event) override;
214private:
215 void initGL();
216 QPointF pixelPosToViewPos(const QPointF& p);
217
218 int m_lastTime;
219 int m_mouseEventTime;
220 int m_distExp;
221 int m_frame;
222 int m_maxTextureSize;
223
224 int m_currentShader;
225 int m_currentTexture;
226 bool m_dynamicCubemap;
227 bool m_updateAllCubemaps;
228
229 RenderOptionsDialog *m_renderOptions;
230 ItemDialog *m_itemDialog;
231 QTimer *m_timer;
232 GLRoundedBox *m_box;
233 TrackBall m_trackBalls[3];
234 QVector<GLTexture *> m_textures;
235 GLTextureCube *m_environment;
236 GLTexture3D *m_noise;
237 GLRenderTargetCube *m_mainCubemap;
238 QVector<GLRenderTargetCube *> m_cubemaps;
239 QVector<QGLShaderProgram *> m_programs;
240 QGLShader *m_vertexShader;
241 QVector<QGLShader *> m_fragmentShaders;
242 QGLShader *m_environmentShader;
243 QGLShaderProgram *m_environmentProgram;
244};
245
246#endif
247

source code of qtbase/examples/widgets/graphicsview/boxes/scene.h