1// Copyright (C) 2019 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QQUICKFLICKABLE_P_H
5#define QQUICKFLICKABLE_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include "qquickitem.h"
19#include <private/qtquickglobal_p.h>
20
21QT_BEGIN_NAMESPACE
22
23class QQuickFlickablePrivate;
24class QQuickFlickableVisibleArea;
25class Q_QUICK_EXPORT QQuickFlickable : public QQuickItem
26{
27 Q_OBJECT
28
29 Q_PROPERTY(qreal contentWidth READ contentWidth WRITE setContentWidth NOTIFY contentWidthChanged)
30 Q_PROPERTY(qreal contentHeight READ contentHeight WRITE setContentHeight NOTIFY contentHeightChanged)
31 Q_PROPERTY(qreal contentX READ contentX WRITE setContentX NOTIFY contentXChanged)
32 Q_PROPERTY(qreal contentY READ contentY WRITE setContentY NOTIFY contentYChanged)
33 Q_PROPERTY(QQuickItem *contentItem READ contentItem CONSTANT)
34
35 Q_PROPERTY(qreal topMargin READ topMargin WRITE setTopMargin NOTIFY topMarginChanged)
36 Q_PROPERTY(qreal bottomMargin READ bottomMargin WRITE setBottomMargin NOTIFY bottomMarginChanged)
37 Q_PROPERTY(qreal originY READ originY NOTIFY originYChanged)
38
39 Q_PROPERTY(qreal leftMargin READ leftMargin WRITE setLeftMargin NOTIFY leftMarginChanged)
40 Q_PROPERTY(qreal rightMargin READ rightMargin WRITE setRightMargin NOTIFY rightMarginChanged)
41 Q_PROPERTY(qreal originX READ originX NOTIFY originXChanged)
42
43 Q_PROPERTY(qreal horizontalVelocity READ horizontalVelocity NOTIFY horizontalVelocityChanged)
44 Q_PROPERTY(qreal verticalVelocity READ verticalVelocity NOTIFY verticalVelocityChanged)
45
46 Q_PROPERTY(BoundsBehavior boundsBehavior READ boundsBehavior WRITE setBoundsBehavior NOTIFY boundsBehaviorChanged)
47 Q_PROPERTY(BoundsMovement boundsMovement READ boundsMovement WRITE setBoundsMovement NOTIFY boundsMovementChanged REVISION(2, 10))
48 Q_PROPERTY(QQuickTransition *rebound READ rebound WRITE setRebound NOTIFY reboundChanged)
49 Q_PROPERTY(qreal maximumFlickVelocity READ maximumFlickVelocity WRITE setMaximumFlickVelocity NOTIFY maximumFlickVelocityChanged)
50 Q_PROPERTY(qreal flickDeceleration READ flickDeceleration WRITE setFlickDeceleration NOTIFY flickDecelerationChanged)
51 Q_PROPERTY(bool moving READ isMoving NOTIFY movingChanged)
52 Q_PROPERTY(bool movingHorizontally READ isMovingHorizontally NOTIFY movingHorizontallyChanged)
53 Q_PROPERTY(bool movingVertically READ isMovingVertically NOTIFY movingVerticallyChanged)
54 Q_PROPERTY(bool flicking READ isFlicking NOTIFY flickingChanged)
55 Q_PROPERTY(bool flickingHorizontally READ isFlickingHorizontally NOTIFY flickingHorizontallyChanged)
56 Q_PROPERTY(bool flickingVertically READ isFlickingVertically NOTIFY flickingVerticallyChanged)
57 Q_PROPERTY(bool dragging READ isDragging NOTIFY draggingChanged)
58 Q_PROPERTY(bool draggingHorizontally READ isDraggingHorizontally NOTIFY draggingHorizontallyChanged)
59 Q_PROPERTY(bool draggingVertically READ isDraggingVertically NOTIFY draggingVerticallyChanged)
60 Q_PROPERTY(FlickableDirection flickableDirection READ flickableDirection WRITE setFlickableDirection NOTIFY flickableDirectionChanged)
61
62 Q_PROPERTY(bool interactive READ isInteractive WRITE setInteractive NOTIFY interactiveChanged)
63 Q_PROPERTY(int pressDelay READ pressDelay WRITE setPressDelay NOTIFY pressDelayChanged)
64
65 Q_PROPERTY(bool atXEnd READ isAtXEnd NOTIFY atXEndChanged)
66 Q_PROPERTY(bool atYEnd READ isAtYEnd NOTIFY atYEndChanged)
67 Q_PROPERTY(bool atXBeginning READ isAtXBeginning NOTIFY atXBeginningChanged)
68 Q_PROPERTY(bool atYBeginning READ isAtYBeginning NOTIFY atYBeginningChanged)
69
70 Q_PROPERTY(QQuickFlickableVisibleArea *visibleArea READ visibleArea CONSTANT)
71
72 Q_PROPERTY(bool pixelAligned READ pixelAligned WRITE setPixelAligned NOTIFY pixelAlignedChanged)
73 Q_PROPERTY(bool synchronousDrag READ synchronousDrag WRITE setSynchronousDrag NOTIFY synchronousDragChanged REVISION(2, 12))
74
75 Q_PROPERTY(qreal horizontalOvershoot READ horizontalOvershoot NOTIFY horizontalOvershootChanged REVISION(2, 9))
76 Q_PROPERTY(qreal verticalOvershoot READ verticalOvershoot NOTIFY verticalOvershootChanged REVISION(2, 9))
77
78 Q_PROPERTY(QQmlListProperty<QObject> flickableData READ flickableData)
79 Q_PROPERTY(QQmlListProperty<QQuickItem> flickableChildren READ flickableChildren)
80 Q_CLASSINFO("DefaultProperty", "flickableData")
81 QML_NAMED_ELEMENT(Flickable)
82 QML_ADDED_IN_VERSION(2, 0)
83
84public:
85 QQuickFlickable(QQuickItem *parent=nullptr);
86 ~QQuickFlickable() override;
87
88 QQmlListProperty<QObject> flickableData();
89 QQmlListProperty<QQuickItem> flickableChildren();
90
91 enum BoundsBehaviorFlag {
92 StopAtBounds = 0x0,
93 DragOverBounds = 0x1,
94 OvershootBounds = 0x2,
95 DragAndOvershootBounds = DragOverBounds | OvershootBounds
96 };
97 Q_DECLARE_FLAGS(BoundsBehavior, BoundsBehaviorFlag)
98 Q_FLAG(BoundsBehavior)
99
100 BoundsBehavior boundsBehavior() const;
101 void setBoundsBehavior(BoundsBehavior);
102
103 enum BoundsMovement {
104 // StopAtBounds = 0x0,
105 FollowBoundsBehavior = 0x1
106 };
107 Q_ENUM(BoundsMovement)
108
109 BoundsMovement boundsMovement() const;
110 void setBoundsMovement(BoundsMovement movement);
111
112 QQuickTransition *rebound() const;
113 void setRebound(QQuickTransition *transition);
114
115 qreal contentWidth() const;
116 void setContentWidth(qreal);
117
118 qreal contentHeight() const;
119 void setContentHeight(qreal);
120
121 qreal contentX() const;
122 virtual void setContentX(qreal pos);
123
124 qreal contentY() const;
125 virtual void setContentY(qreal pos);
126
127 qreal topMargin() const;
128 void setTopMargin(qreal m);
129
130 qreal bottomMargin() const;
131 void setBottomMargin(qreal m);
132
133 qreal leftMargin() const;
134 void setLeftMargin(qreal m);
135
136 qreal rightMargin() const;
137 void setRightMargin(qreal m);
138
139 virtual qreal originY() const;
140 virtual qreal originX() const;
141
142 bool isMoving() const;
143 bool isMovingHorizontally() const;
144 bool isMovingVertically() const;
145 bool isFlicking() const;
146 bool isFlickingHorizontally() const;
147 bool isFlickingVertically() const;
148 bool isDragging() const;
149 bool isDraggingHorizontally() const;
150 bool isDraggingVertically() const;
151
152 int pressDelay() const;
153 void setPressDelay(int delay);
154
155 qreal maximumFlickVelocity() const;
156 void setMaximumFlickVelocity(qreal);
157
158 qreal flickDeceleration() const;
159 void setFlickDeceleration(qreal);
160
161 bool isInteractive() const;
162 void setInteractive(bool);
163
164 qreal horizontalVelocity() const;
165 qreal verticalVelocity() const;
166
167 bool isAtXEnd() const;
168 bool isAtXBeginning() const;
169 bool isAtYEnd() const;
170 bool isAtYBeginning() const;
171
172 QQuickItem *contentItem() const;
173
174 enum FlickableDirection { AutoFlickDirection=0x0, HorizontalFlick=0x1, VerticalFlick=0x2, HorizontalAndVerticalFlick=0x3,
175 AutoFlickIfNeeded=0xc };
176 Q_ENUM(FlickableDirection)
177 FlickableDirection flickableDirection() const;
178 void setFlickableDirection(FlickableDirection);
179
180 bool pixelAligned() const;
181 void setPixelAligned(bool align);
182
183 bool synchronousDrag() const;
184 void setSynchronousDrag(bool v);
185
186 qreal horizontalOvershoot() const;
187 qreal verticalOvershoot() const;
188
189 Q_INVOKABLE void resizeContent(qreal w, qreal h, QPointF center);
190 Q_INVOKABLE void returnToBounds();
191 Q_INVOKABLE void flick(qreal xVelocity, qreal yVelocity);
192 Q_INVOKABLE void cancelFlick();
193
194Q_SIGNALS:
195 void contentWidthChanged();
196 void contentHeightChanged();
197 void contentXChanged();
198 void contentYChanged();
199 void topMarginChanged();
200 void bottomMarginChanged();
201 void leftMarginChanged();
202 void rightMarginChanged();
203 void originYChanged();
204 void originXChanged();
205 void movingChanged();
206 void movingHorizontallyChanged();
207 void movingVerticallyChanged();
208 void flickingChanged();
209 void flickingHorizontallyChanged();
210 void flickingVerticallyChanged();
211 void draggingChanged();
212 void draggingHorizontallyChanged();
213 void draggingVerticallyChanged();
214 void horizontalVelocityChanged();
215 void verticalVelocityChanged();
216 void isAtBoundaryChanged();
217 void flickableDirectionChanged();
218 void interactiveChanged();
219 void boundsBehaviorChanged();
220 Q_REVISION(2, 10) void boundsMovementChanged();
221 void reboundChanged();
222 void maximumFlickVelocityChanged();
223 void flickDecelerationChanged();
224 void pressDelayChanged();
225 void movementStarted();
226 void movementEnded();
227 void flickStarted();
228 void flickEnded();
229 void dragStarted();
230 void dragEnded();
231 void pixelAlignedChanged();
232 Q_REVISION(2, 12) void synchronousDragChanged();
233 Q_REVISION(2, 9) void horizontalOvershootChanged();
234 Q_REVISION(2, 9) void verticalOvershootChanged();
235
236 // The next four signals should be marked as Q_REVISION(2, 12). See QTBUG-71243
237 void atXEndChanged();
238 void atYEndChanged();
239 void atXBeginningChanged();
240 void atYBeginningChanged();
241
242protected:
243 bool childMouseEventFilter(QQuickItem *, QEvent *) override;
244 void mousePressEvent(QMouseEvent *event) override;
245 void mouseMoveEvent(QMouseEvent *event) override;
246 void mouseReleaseEvent(QMouseEvent *event) override;
247 void touchEvent(QTouchEvent *event) override;
248#if QT_CONFIG(wheelevent)
249 void wheelEvent(QWheelEvent *event) override;
250#endif
251 void timerEvent(QTimerEvent *event) override;
252
253 QQuickFlickableVisibleArea *visibleArea();
254
255protected Q_SLOTS:
256 void movementStarting();
257 void movementEnding();
258 void movementEnding(bool hMovementEnding, bool vMovementEnding);
259 void velocityTimelineCompleted();
260 void timelineCompleted();
261
262protected:
263 virtual qreal minXExtent() const;
264 virtual qreal minYExtent() const;
265 virtual qreal maxXExtent() const;
266 virtual qreal maxYExtent() const;
267 qreal vWidth() const;
268 qreal vHeight() const;
269 void componentComplete() override;
270 virtual void viewportMoved(Qt::Orientations orient);
271 void geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry) override;
272 void mouseUngrabEvent() override;
273 bool filterPointerEvent(QQuickItem *receiver, QPointerEvent *event);
274
275 bool xflick() const;
276 bool yflick() const;
277
278protected:
279 QQuickFlickable(QQuickFlickablePrivate &dd, QQuickItem *parent);
280
281private:
282 Q_DISABLE_COPY(QQuickFlickable)
283 Q_DECLARE_PRIVATE(QQuickFlickable)
284 friend class QQuickFlickableVisibleArea;
285 friend class QQuickFlickableReboundTransition;
286};
287
288QT_END_NAMESPACE
289
290#endif // QQUICKFLICKABLE_P_H
291

source code of qtdeclarative/src/quick/items/qquickflickable_p.h