內容

• 公共函數
• 保護函數
• 重實現保護函數
• 詳細描述

Q3Button Class

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

頭：	#include <Q3Button>
繼承：	QAbstractButton

• 所有成員列錶，包括繼承成員

公共函數

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

• 21 公共函數繼承自 QAbstractButton
• 220 公共函數繼承自 QWidget
• 29 公共函數繼承自 QObject
• 12 公共函數繼承自 QPaintDevice

保護函數

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

重實現保護函數

virtual void

paintEvent (QPaintEvent * event )

• 14 保護函數繼承自 QAbstractButton
• 37 保護函數繼承自 QWidget
• 8 保護函數繼承自 QObject
• 1 保護函數繼承自 QPaintDevice

額外繼承成員

• 11 特性繼承自 QAbstractButton
• 58 特性繼承自 QWidget
• 1 特性繼承自 QObject
• 5 公共槽繼承自 QAbstractButton
• 19 公共槽繼承自 QWidget
• 1 公共槽繼承自 QObject
• 4 信號繼承自 QAbstractButton
• 1 信號繼承自 QWidget
• 1 信號繼承自 QObject
• 4 static public members inherited from QWidget
• 7 靜態公共成員繼承自 QObject
• 1 保護槽繼承自 QWidget

詳細描述

The Q3Button class is a compatibility base class of button widgets

In new code, use QAbstractButton .

要子類化 Q3Button ，必須至少重實現 drawButton () (to draw the button's outline) and drawButtonLabel () (to draw its text or pixmap). It is generally advisable to reimplement sizeHint ()，且有時是 hitButton () (to determine whether a button press is within the button).

成員函數文檔編製

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

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

Q3Button:: ~Q3Button ()

銷毀按鈕。

[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 ().

另請參閱 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 ().

另請參閱 drawButton () 和 paintEvent ().

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

重實現自 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 ().

另請參閱 drawButton () 和 drawButtonLabel ().