WebApr 14, 2024 · 在QT编程中,QGraphicsView是怎么显示出图片的. 1、在窗体中添加一个label和三个按钮,label用来显示 图片 ,存储base64按钮:将图片编码为base64字符串。. 2、在构造 函数 中读取图片,然后显示在label上,显示效果如下图。. 3、将图片保存为base64,主要用到了QPixmap的 ... WebApr 15, 2024 · QGraphicsView提供了一个可滚动的视图窗口,可以在其中显示QGraphicsScene中的图形项。您可以使用QGraphicsView来缩放、平移和旋转图形项,以及捕获鼠标和键盘事件。要使用QGraphicsView,您需要创建一个QGraphicsScene,并将其设置为QGraphicsView的场景。
QGrahicsView "translate" has no effect Qt Forum
WebQGraphicsItem supports projective transformations in addition to its base position, pos (). There are several ways to change an item's transformation. For simple transformations, … WebQGraphicsView supports the same affine transformations as QPainter does through QGraphicsView::setMatrix (). By applying a transformation to the view, you can easily add support for common navigation features such as zooming and rotating. Here is an example of how to implement zoom and rotate slots in a subclass of QGraphicsView: the only shopify dropshipping guide
Obsolete Members for QGraphicsView Qt Widgets 6.5.0
WebQTransform is the recommended transformation class in Qt. A QTransform object can be built using the setMatrix (), scale (), rotate (), translate () and shear () functions. Alternatively, it can be built by applying basic matrix operations. WebThe issue seems to be that the QGraphicsView 's transform has nothing to do with its scroll position, so the behavior of QGraphicsView::mapToScene (const QPoint&) const depends on both the scroll position and the transform. I had to look at the source for mapToScene to understand this. WebFeb 28, 2024 · setTransform ()函数可对 QGraphicsView 视图或者 QGraphicsItem 进行缩放,第二个参数传入true时目标将以等百分比进行缩放。 函数 void QGraphicsView :: … the only sea without a coastline