The QAbstractTextDocumentLayout::PaintContext 类是定义使用参数的方便类，当描绘文档布局时。 更多...
| 头： | #include <PaintContext> |
| qmake: | QT += gui |
| QRectF | clip |
| int | cursorPosition |
| QPalette | palette |
| QVector<QAbstractTextDocumentLayout::Selection> | selections |
The QAbstractTextDocumentLayout::PaintContext 类是定义使用参数的方便类，当描绘文档布局时。
A paint context is used when rendering custom layouts for QTextDocuments with the QAbstractTextDocumentLayout::draw () function. It is specified by a cursor position , default text color , clip rectangle and a collection of selections .
另请参阅 QAbstractTextDocumentLayout .
This variable holds a hint to the layout specifying the area around paragraphs, frames or text require painting.
Everything outside of this rectangle does not need to be painted.
Specifying a clip rectangle can speed up drawing of large documents significantly. Note that the clip rectangle is in document coordinates (not in viewport coordinates). It is not a substitute for a clip region set on the painter but merely a hint.
The default value is a null rectangle indicating everything needs to be painted.
This variable holds the position within the document, where the cursor line should be drawn.
默认值为 -1。
This variable holds the default color that is used for the text, when no color is specified.
默认值为应用程序的默认调色板。
This variable holds the collection of selections that will be rendered when passing this paint context to QAbstractTextDocumentLayout 's draw () 函数。
The default value is an empty vector indicating no selection.
