内容

• 公共函数
• 保护函数
• 重实现保护函数
• 详细描述

Q3Button Class

The Q3Button class is a compatibility base class of button widgets 更多...

头：	#include <Q3Button>
继承：	QAbstractButton

• 所有成员列表，包括继承成员

公共函数

	Q3Button (QWidget * parent = 0, const char * name = 0, Qt::WindowFlags f = 0)
	~Q3Button ()

• 21 公共函数继承自 QAbstractButton
• 220 公共函数继承自 QWidget
• 29 公共函数继承自 QObject
• 12 公共函数继承自 QPaintDevice

保护函数

virtual void	drawButton (QPainter * painter )
virtual void	drawButtonLabel (QPainter * painter )

重实现保护函数

virtual void

paintEvent (QPaintEvent * event )

• 14 保护函数继承自 QAbstractButton
• 37 保护函数继承自 QWidget
• 8 保护函数继承自 QObject
• 1 保护函数继承自 QPaintDevice

额外继承成员

• 11 特性继承自 QAbstractButton
• 58 特性继承自 QWidget
• 1 特性继承自 QObject
• 5 公共槽继承自 QAbstractButton
• 19 公共槽继承自 QWidget
• 1 公共槽继承自 QObject
• 4 信号继承自 QAbstractButton
• 1 信号继承自 QWidget
• 1 信号继承自 QObject
• 4 static public members inherited from QWidget
• 7 静态公共成员继承自 QObject
• 1 保护槽继承自 QWidget

详细描述

The Q3Button class is a compatibility base class of button widgets

In new code, use QAbstractButton .

要子类化 Q3Button ，必须至少重实现 drawButton () (to draw the button's outline) and drawButtonLabel () (to draw its text or pixmap). It is generally advisable to reimplement sizeHint ()，且有时是 hitButton () (to determine whether a button press is within the button).

成员函数文档编制

Q3Button:: Q3Button ( QWidget * parent = 0, const char * name = 0, Qt::WindowFlags f = 0)

Constructs a standard button called name 采用父级 parent , using the widget flags f .

Q3Button:: ~Q3Button ()

销毁按钮。

[virtual protected] void Q3Button:: drawButton ( QPainter * painter )

Draws the button on the given painter . The default implementation does nothing.

This virtual function is reimplemented by subclasses to draw real buttons. At some point, these reimplementations should call drawButtonLabel ().

另请参阅 drawButtonLabel () 和 paintEvent ().

[virtual protected] void Q3Button:: drawButtonLabel ( QPainter * painter )

Draws the button text or pixmap on the given painter .

This virtual function is reimplemented by subclasses to draw real buttons. It is invoked by drawButton ().

另请参阅 drawButton () 和 paintEvent ().

[virtual protected] void Q3Button:: paintEvent ( QPaintEvent * event )

重实现自 QWidget::paintEvent ().

Handles paint events, received in event , for buttons. Small and typically complex buttons are painted double-buffered to reduce flicker. The actually drawing is done in the virtual functions drawButton () 和 drawButtonLabel ().

另请参阅 drawButton () 和 drawButtonLabel ().