内容

• 公共类型
• 公共函数
• 详细描述

QContextMenuEvent 类

QContextMenuEvent class contains parameters that describe a context menu event. 更多...

头：	#include <QContextMenuEvent>
qmake:	QT += gui
继承：	QInputEvent

• 所有成员列表，包括继承成员

公共类型

enum	Reason { Mouse, Keyboard, Other }

公共函数

	QContextMenuEvent (Reason reason , const QPoint & pos , const QPoint & globalPos , Qt::KeyboardModifiers modifiers )
	QContextMenuEvent (Reason reason , const QPoint & pos , const QPoint & globalPos )
	QContextMenuEvent (Reason reason , const QPoint & pos )
const QPoint &	globalPos () const
int	globalX () const
int	globalY () const
const QPoint &	pos () const
Reason	reason () const
int	x () const
int	y () const

• 2 公共函数继承自 QInputEvent
• 6 公共函数继承自 QEvent

额外继承成员

• 1 特性继承自 QEvent
• 1 静态公共成员继承自 QEvent

详细描述

QContextMenuEvent class contains parameters that describe a context menu event.

Context menu events are sent to widgets when a user performs an action associated with opening a context menu. The actions required to open context menus vary between platforms; for example, on Windows, pressing the menu button or clicking the right mouse button will cause this event to be sent.

当此事件发生时，通常展示 QMenu 带上下文菜单，若这与上下文有关。

Context menu events contain a special accept flag that indicates whether the receiver accepted the event. If the event handler does not accept the event then, if possible, whatever triggered the event will be handled as a regular input event.

成员类型文档编制

enum QContextMenuEvent:: Reason

此枚举描述事件为什么被发送的原因。

常量	值	描述
QContextMenuEvent::Mouse	0	The mouse caused the event to be sent. Normally this means the right mouse button was clicked, but this is platform dependent.
QContextMenuEvent::Keyboard	1	The keyboard caused this event to be sent. On Windows, this means the menu button was pressed.
QContextMenuEvent::Other	2	The event was sent by some other means (i.e. not by the mouse or keyboard).

成员函数文档编制

QContextMenuEvent:: QContextMenuEvent ( Reason reason , const QPoint & pos , const QPoint & globalPos , Qt::KeyboardModifiers modifiers )

Constructs a context menu event object with the accept parameter flag set to false.

reason 参数必须是 QContextMenuEvent::Mouse or QContextMenuEvent::Keyboard .

pos parameter specifies the mouse position relative to the receiving widget. globalPos is the mouse position in absolute coordinates. The modifiers holds the keyboard modifiers.

QContextMenuEvent:: QContextMenuEvent ( Reason reason , const QPoint & pos , const QPoint & globalPos )

Constructs a context menu event object with the accept parameter flag set to false.

reason 参数必须是 QContextMenuEvent::Mouse or QContextMenuEvent::Keyboard .

pos parameter specifies the mouse position relative to the receiving widget. globalPos is the mouse position in absolute coordinates.

QContextMenuEvent:: QContextMenuEvent ( Reason reason , const QPoint & pos )

Constructs a context menu event object with the accept parameter flag set to false.

reason 参数必须是 QContextMenuEvent::Mouse or QContextMenuEvent::Keyboard .

pos parameter specifies the mouse position relative to the receiving widget.

globalPos () 被初始化为 QCursor::pos ()，可能不合适。使用其它构造函数以明确指定全局位置。

const QPoint &QContextMenuEvent:: globalPos () const

Returns the global position of the mouse pointer at the time of the event.

另请参阅 x (), y ()，和 pos ().

int QContextMenuEvent:: globalX () const

返回事件发生时鼠标指针的全局 x 位置。

另请参阅 globalY () 和 globalPos ().

int QContextMenuEvent:: globalY () const

Returns the global y position of the mouse pointer at the time of the event.

另请参阅 globalX () 和 globalPos ().

const QPoint &QContextMenuEvent:: pos () const

Returns the position of the mouse pointer relative to the widget that received the event.

另请参阅 x (), y ()，和 globalPos ().

Reason QContextMenuEvent:: reason () const

Returns the reason for this context event.

int QContextMenuEvent:: x () const

Returns the x position of the mouse pointer, relative to the widget that received the event.

另请参阅 y () 和 pos ().

int QContextMenuEvent:: y () const

Returns the y position of the mouse pointer, relative to the widget that received the event.

另请参阅 x () 和 pos ().