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qquickpointerhandler_p.h
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1// Copyright (C) 2018 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 QQUICKPOINTERHANDLER_H
5#define QQUICKPOINTERHANDLER_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 <QtCore/QObject>
19#include <QtCore/qloggingcategory.h>
20#include <QtCore/qtconfigmacros.h>
21#include <QtGui/qeventpoint.h>
22#include <QtGui/qpointingdevice.h>
23#include <QtQml/QQmlParserStatus>
24#include <QtQml/qqmlregistration.h>
25#include <QtQuick/qtquickglobal.h>
26#include <QtQuick/private/qtquickexports_p.h>
27
28QT_BEGIN_NAMESPACE
29
30Q_DECLARE_LOGGING_CATEGORY(lcPointerHandlerDispatch)
31
32class QQuickItem;
33class QQuickPointerHandlerPrivate;
34class QPointerEvent;
35
36class Q_QUICK_PRIVATE_EXPORT QQuickPointerHandler : public QObject, public QQmlParserStatus
37{
38 Q_OBJECT
39 Q_INTERFACES(QQmlParserStatus)
40
41 Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged FINAL)
42 Q_PROPERTY(bool active READ active NOTIFY activeChanged FINAL)
43 Q_PROPERTY(QQuickItem * target READ target WRITE setTarget NOTIFY targetChanged FINAL)
44 Q_PROPERTY(QQuickItem * parent READ parentItem WRITE setParentItem NOTIFY parentChanged FINAL)
45 Q_PROPERTY(GrabPermissions grabPermissions READ grabPermissions WRITE setGrabPermissions NOTIFY grabPermissionChanged FINAL)
46 Q_PROPERTY(qreal margin READ margin WRITE setMargin NOTIFY marginChanged FINAL)
47 Q_PROPERTY(int dragThreshold READ dragThreshold WRITE setDragThreshold RESET resetDragThreshold NOTIFY dragThresholdChanged REVISION(2, 15) FINAL)
48#if QT_CONFIG(cursor)
49 Q_PROPERTY(Qt::CursorShape cursorShape READ cursorShape WRITE setCursorShape RESET resetCursorShape NOTIFY cursorShapeChanged REVISION(2, 15) FINAL)
50#endif
51
52 Q_CLASSINFO("ParentProperty", "parent")
53 QML_NAMED_ELEMENT(PointerHandler)
54 QML_UNCREATABLE("PointerHandler is an abstract base class.")
55 QML_ADDED_IN_VERSION(2, 12)
56
57public:
58 explicit QQuickPointerHandler(QQuickItem *parent = nullptr);
59 ~QQuickPointerHandler();
60
61 enum GrabPermission {
62 TakeOverForbidden = 0x0,
63 CanTakeOverFromHandlersOfSameType = 0x01,
64 CanTakeOverFromHandlersOfDifferentType= 0x02,
65 CanTakeOverFromItems = 0x04,
66 CanTakeOverFromAnything = 0x0F,
67 ApprovesTakeOverByHandlersOfSameType = 0x10,
68 ApprovesTakeOverByHandlersOfDifferentType= 0x20,
69 ApprovesTakeOverByItems = 0x40,
70 ApprovesCancellation = 0x80,
71 ApprovesTakeOverByAnything = 0xF0
72 };
73 Q_DECLARE_FLAGS(GrabPermissions, GrabPermission)
74 Q_FLAG(GrabPermissions)
75
76public:
77 bool enabled() const;
78 void setEnabled(bool enabled);
79
80 bool active() const;
81
82 QQuickItem *target() const;
83 void setTarget(QQuickItem *target);
84
85 QQuickItem * parentItem() const;
86 void setParentItem(QQuickItem *p);
87
88 void handlePointerEvent(QPointerEvent *event);
89
90 GrabPermissions grabPermissions() const;
91 void setGrabPermissions(GrabPermissions grabPermissions);
92
93 qreal margin() const;
94 void setMargin(qreal pointDistanceThreshold);
95
96 int dragThreshold() const;
97 void setDragThreshold(int t);
98 void resetDragThreshold();
99
100#if QT_CONFIG(cursor)
101 Qt::CursorShape cursorShape() const;
102 void setCursorShape(Qt::CursorShape shape);
103 void resetCursorShape();
104 bool isCursorShapeExplicitlySet() const;
105#endif
106
107Q_SIGNALS:
108 void enabledChanged();
109 void activeChanged();
110 void targetChanged();
111 void marginChanged();
112 Q_REVISION(2, 15) void dragThresholdChanged();
113 void grabChanged(QPointingDevice::GrabTransition transition, QEventPoint point);
114 void grabPermissionChanged();
115 void canceled(QEventPoint point);
116#if QT_CONFIG(cursor)
117 Q_REVISION(2, 15) void cursorShapeChanged();
118#endif
119 Q_REVISION(6, 3) void parentChanged();
120
121protected:
122 QQuickPointerHandler(QQuickPointerHandlerPrivate &dd, QQuickItem *parent);
123
124 void classBegin() override;
125 void componentComplete() override;
126 bool event(QEvent *) override;
127
128 QPointerEvent *currentEvent();
129 virtual bool wantsPointerEvent(QPointerEvent *event);
130 virtual bool wantsEventPoint(const QPointerEvent *event, const QEventPoint &point);
131 virtual void handlePointerEventImpl(QPointerEvent *event);
132 void setActive(bool active);
133 virtual void onTargetChanged(QQuickItem *oldTarget) { Q_UNUSED(oldTarget); }
134 virtual void onActiveChanged() { }
135 virtual void onGrabChanged(QQuickPointerHandler *grabber, QPointingDevice::GrabTransition transition,
136 QPointerEvent *event, QEventPoint &point);
137 virtual bool canGrab(QPointerEvent *event, const QEventPoint &point);
138 virtual bool approveGrabTransition(QPointerEvent *event, const QEventPoint &point, QObject *proposedGrabber);
139 void setPassiveGrab(QPointerEvent *event, const QEventPoint &point, bool grab = true);
140 bool setExclusiveGrab(QPointerEvent *ev, const QEventPoint &point, bool grab = true);
141 void cancelAllGrabs(QPointerEvent *event, QEventPoint &point);
142 QPointF eventPos(const QEventPoint &point) const;
143 bool parentContains(const QEventPoint &point) const;
144 bool parentContains(const QPointF &scenePosition) const;
145
146 friend class QQuickDeliveryAgentPrivate;
147 friend class QQuickItemPrivate;
148 friend class QQuickWindowPrivate;
149
150 Q_DECLARE_PRIVATE(QQuickPointerHandler)
151};
152
153Q_DECLARE_OPERATORS_FOR_FLAGS(QQuickPointerHandler::GrabPermissions)
154
155QT_END_NAMESPACE
156
157#endif // QQUICKPOINTERHANDLER_H
QEventPoint
The QEventPoint class provides information about a point in a QPointerEvent.
Definition qeventpoint.h:20
QEvent
\inmodule QtCore
Definition qcoreevent.h:45
QObject
\inmodule QtCore
Definition qobject.h:90
QPointF
\inmodule QtCore\reentrant
Definition qpoint.h:214
QPointerEvent
A base class for pointer events.
Definition qevent.h:73
QPointingDevice
The QPointingDevice class describes a device from which mouse, touch or tablet events originate.
Definition qpointingdevice.h:51
QPointingDevice::GrabTransition
GrabTransition
This enum represents a transition of exclusive or passive grab from one object (possibly nullptr) to ...
Definition qpointingdevice.h:72
QQmlParserStatus
The QQmlParserStatus class provides updates on the QML parser state.
Definition qqmlparserstatus.h:14
QQuickItem
The QQuickItem class provides the most basic of all visual items in \l {Qt Quick}.
Definition qquickitem.h:64
QQuickPointerHandler::Q_REVISION
Q_REVISION(2, 15) void dragThresholdChanged()
QQuickPointerHandler::Q_REVISION
Q_REVISION(6, 3) void parentChanged()
QT_BEGIN_NAMESPACE
Combined button and popup list for selecting options.
Definition qstandardpaths_haiku.cpp:21
QT_END_NAMESPACE
Definition qsharedpointer.cpp:1545
Qt::CursorShape
CursorShape
Definition qnamespace.h:1150
void
DBusConnection const char DBusError DBusBusType DBusError return DBusConnection DBusHandleMessageFunction void DBusFreeFunction return DBusConnection return DBusConnection return const char DBusError return DBusConnection DBusMessage dbus_uint32_t return DBusConnection dbus_bool_t DBusConnection DBusAddWatchFunction DBusRemoveWatchFunction DBusWatchToggledFunction void DBusFreeFunction return DBusConnection DBusDispatchStatusFunction void DBusFreeFunction DBusTimeout return DBusTimeout return DBusWatch return DBusWatch unsigned int return DBusError const DBusError return const DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessageIter int const void return DBusMessageIter DBusMessageIter return DBusMessageIter void DBusMessageIter void int return DBusMessage DBusMessageIter return DBusMessageIter return DBusMessageIter DBusMessageIter const char const char const char const char return DBusMessage return DBusMessage const char return DBusMessage dbus_bool_t return DBusMessage dbus_uint32_t return DBusMessage void
Definition qdbus_symbols_p.h:401
Q_DECLARE_FLAGS
#define Q_DECLARE_FLAGS(Flags, Enum)
Definition qflags.h:174
Q_DECLARE_OPERATORS_FOR_FLAGS
#define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)
Definition qflags.h:194
Q_DECLARE_LOGGING_CATEGORY
#define Q_DECLARE_LOGGING_CATEGORY(name)
Definition qloggingcategory.h:106
enabled
GLenum GLenum GLsizei const GLuint GLboolean enabled
Definition qopengles2ext.h:150
target
GLenum target
Definition qopengles2ext.h:751
event
struct _cl_event * event
Definition qopenglext.h:2998
t
GLdouble GLdouble t
Definition qopenglext.h:243
p
GLfloat GLfloat p
[1]
Definition qopenglext.h:12698
QML_UNCREATABLE
#define QML_UNCREATABLE(REASON)
Definition qqmlintegration.h:55
QML_NAMED_ELEMENT
#define QML_NAMED_ELEMENT(NAME)
Definition qqmlintegration.h:52
QML_ADDED_IN_VERSION
#define QML_ADDED_IN_VERSION(MAJOR, MINOR)
Definition qqmlintegration.h:86
Q_PROPERTY
#define Q_PROPERTY(...)
Definition qtmetamacros.h:56
Q_OBJECT
#define Q_OBJECT
Definition qtmetamacros.h:117
Q_REVISION
#define Q_REVISION(...)
Definition qtmetamacros.h:59
Q_CLASSINFO
#define Q_CLASSINFO(name, value)
Definition qtmetamacros.h:52
Q_FLAG
#define Q_FLAG(x)
Definition qtmetamacros.h:69
Q_INTERFACES
#define Q_INTERFACES(x)
Definition qtmetamacros.h:55
Q_SIGNALS
#define Q_SIGNALS
Definition qtmetamacros.h:45
Q_UNUSED
#define Q_UNUSED(x)
Definition qtpreprocessorsupport.h:20
qreal
double qreal
Definition qtypes.h:92
enabled
#define enabled
Definition qopenglext.h:3098
parent
IUIAutomationTreeWalker __RPC__deref_out_opt IUIAutomationElement ** parent
Definition uiaclientinterfaces_p.h:209