QSplitterHandle ¶

概要 ¶

详细描述 ¶

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 createHandle() to instantiate the custom splitter handle. For example, a minimum QSplitter subclass might look like this:

class Splitter(QSplitter):
    def __init__(self, orientation, parent):
        ...
    def createHandle(self):
        ...
}
											

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() and 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.

另请参阅

QSplitter

class QSplitterHandle ( o , parent ) ¶

param parent

QSplitter

param o

取向

创建 QSplitter handle with the given orientation and parent .

PySide2.QtWidgets.QSplitterHandle. closestLegalPosition ( p ) ¶

参数

p – int

返回类型

int

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.

另请参阅

closestLegalPosition() moveSplitter()

PySide2.QtWidgets.QSplitterHandle. moveSplitter ( p ) ¶

参数

p – int

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 moveSplitter() .

另请参阅

moveSplitter() closestLegalPosition()

PySide2.QtWidgets.QSplitterHandle. opaqueResize ( ) ¶

返回类型

bool

返回 true 若动态 (不透明) 重置 Widget 尺寸当交互移动分割器时。否则返回 false . This value is controlled by the QSplitter .

另请参阅

opaqueResize()

PySide2.QtWidgets.QSplitterHandle. orientation ( ) ¶

返回类型

取向

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

另请参阅

setOrientation() orientation()

PySide2.QtWidgets.QSplitterHandle. setOrientation ( o ) ¶

参数

o – 取向

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

另请参阅

orientation() setOrientation()

PySide2.QtWidgets.QSplitterHandle. splitter ( ) ¶

返回类型

QSplitter

返回关联此分割器手柄的分割器。

另请参阅

handle()