QSplitterHandle 類

QSplitterHandle 類為分割器提供手柄功能。 更多...

頭：	#include <QSplitterHandle>
qmake:	QT += widgets
繼承：	QWidget

• 所有成員列錶，包括繼承成員

公共函數

	QSplitterHandle (Qt::Orientation orientation , QSplitter * parent )
virtual	~QSplitterHandle ()
bool	opaqueResize () const
Qt::Orientation	orientation () const
void	setOrientation (Qt::Orientation orientation )
QSplitter *	splitter () const

重實現公共函數

virtual QSize

sizeHint () const override

保護函數

int	closestLegalPosition (int pos )
void	moveSplitter (int pos )

重實現保護函數

virtual bool	event (QEvent * event ) override
virtual void	mouseMoveEvent (QMouseEvent * e ) override
virtual void	mousePressEvent (QMouseEvent * e ) override
virtual void	mouseReleaseEvent (QMouseEvent * e ) override
virtual void	paintEvent ( QPaintEvent * ) override
virtual void	resizeEvent (QResizeEvent * event ) override

詳細描述

QSplitterHandle is typically what people think about when they think about a splitter. It is the handle that is used to resize the widgets.

A typical developer using QSplitter will never have to worry about QSplitterHandle. It is provided for developers who want splitter handles that provide extra features, such as popup menus.

The typical way one would create splitter handles is to subclass QSplitter and then reimplement QSplitter::createHandle () to instantiate the custom splitter handle. For example, a minimum QSplitter subclass might look like this:

class Splitter : public QSplitter
{
public:
    Splitter(Qt::Orientation orientation, QWidget *parent = 0);
protected:
    QSplitterHandle *createHandle() override;
};
					

The createHandle() implementation simply constructs a custom splitter handle, called Splitter in this example:

QSplitterHandle *Splitter::createHandle()
{
    return new SplitterHandle(orientation(), this);
}
					

Information about a given handle can be obtained using functions like orientation () 和 opaqueResize (), and is retrieved from its parent splitter. Details like these can be used to give custom handles different appearances depending on the splitter's orientation.

The complexity of a custom handle subclass depends on the tasks that it needs to perform. A simple subclass might only provide a paintEvent () implementation:

void SplitterHandle::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    if (orientation() == Qt::Horizontal) {
        gradient.setStart(rect().left(), rect().height()/2);
        gradient.setFinalStop(rect().right(), rect().height()/2);
    } else {
        gradient.setStart(rect().width()/2, rect().top());
        gradient.setFinalStop(rect().width()/2, rect().bottom());
    }
    painter.fillRect(event->rect(), QBrush(gradient));
}
					

In this example, a predefined gradient is set up differently depending on the orientation of the handle. QSplitterHandle provides a reasonable size hint for the handle, so the subclass does not need to provide a reimplementation of sizeHint () unless the handle has special size requirements.

另請參閱 QSplitter .

成員函數文檔編製

QSplitterHandle:: QSplitterHandle ( Qt::Orientation orientation , QSplitter * parent )

創建 QSplitter handle with the given orientation and parent .

[虛擬] QSplitterHandle:: ~QSplitterHandle ()

析構函數。

[protected] int QSplitterHandle:: closestLegalPosition ( int pos )

Returns the closest legal position to pos of the splitter handle. The positions are measured from the left or top edge of the splitter, even for right-to-left languages.

另請參閱 QSplitter::closestLegalPosition () 和 moveSplitter ().

[override virtual protected] bool QSplitterHandle:: event ( QEvent * event )

重實現： QWidget::event (QEvent *event).

[override virtual protected] void QSplitterHandle:: mouseMoveEvent ( QMouseEvent * e )

重實現： QWidget::mouseMoveEvent (QMouseEvent *event).

[override virtual protected] void QSplitterHandle:: mousePressEvent ( QMouseEvent * e )

重實現： QWidget::mousePressEvent (QMouseEvent *event).

[override virtual protected] void QSplitterHandle:: mouseReleaseEvent ( QMouseEvent * e )

重實現： QWidget::mouseReleaseEvent (QMouseEvent *event).

[protected] void QSplitterHandle:: moveSplitter ( int pos )

Tells the splitter to move this handle to position pos , which is the distance from the left or top edge of the widget.

注意， pos is also measured from the left (or top) for right-to-left languages. This function will map pos to the appropriate position before calling QSplitter::moveSplitter ().

另請參閱 QSplitter::moveSplitter () 和 closestLegalPosition ().

bool QSplitterHandle:: opaqueResize () const

返迴 true 若動態 (不透明) 重置 Widget 尺寸當交互移動分割器時。否則返迴 false . This value is controlled by the QSplitter .

另請參閱 QSplitter::opaqueResize ().

Qt::Orientation QSplitterHandle:: orientation () const

Returns the handle's orientation. This is usually propagated from the QSplitter .

另請參閱 setOrientation () 和 QSplitter::orientation ().

[override virtual protected] void QSplitterHandle:: paintEvent ( QPaintEvent * )

重實現： QWidget::paintEvent (QPaintEvent *event).

[override virtual protected] void QSplitterHandle:: resizeEvent ( QResizeEvent * event )

重實現： QWidget::resizeEvent (QResizeEvent *event).

void QSplitterHandle:: setOrientation ( Qt::Orientation orientation )

Sets the orientation of the splitter handle to orientation . This is usually propagated from the QSplitter .

另請參閱 orientation () 和 QSplitter::setOrientation ().

[override virtual] QSize QSplitterHandle:: sizeHint () const

重實現訪問函數為特性： QWidget::sizeHint .

QSplitter *QSplitterHandle:: splitter () const

返迴關聯此分割器手柄的分割器。

另請參閱 QSplitter::handle ().

內容

1. 公共函數

2. 重實現公共函數

3. 保護函數

4. 重實現保護函數

5. 詳細描述