I am using a standard QGraphicsView and QGraphicsScene, but I have subclassed a QGraphicsPixmapItem to my own ImagePixmapItem for the purposes of being able to use the mouse events on the ImagePixmapI
If understood correctly, QGraphicsView is supposed to handle million items efficiently. In my application, I only have some few thousand and the performance is already very bad. When the View is sho
I have a QGraphicsItem that contains several other QGraphicsItems. How can I ensure that those children items are drawn and clipped against parent item\'s rect when moving t开发者_如何学Pythonhem?Us
The easy way to create the long cross line cursor (as long as viewport) is create a cross line graphicsItem, when mouse moved, set the item\'s pos property.
I want to have a QGraphicsView that never scrolls automatically. Similar: Basically, my question is identical to http://developer.qt.nokia.com/forums/viewthread/2220 , but that thread didn\'t receiv
I have two QGraphicView objects (based on the same derived class). Th开发者_如何学Pythoney contain different scenes, but a few (sometimes many) items are the same. Such items have common coordinates.
I\'m trying to use QGraphicsView in order to display a map image and draw some items on top of it. The map boundaries are in a Cartesian coordinate system, for example NE(-500,200) to SW(600,-350). I
I enconutered a problem, when dealing with QGraphicsScene and QPixmap. I am sequentially displaying frames, captured by the camera. QTimer object is calling updateSingleView() function every 100ms. T
I am using Qt to construct an application. My MainWindow con开发者_Go百科sists of an image of a map which I would like to be resized to the fit the window. This means when the window gets smaller the
My QGraphicsView item is a lot bigger than its background image, but I would like that background image to be drawn only once. Now the whole thing is filled with that background image as many times as
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