Graphicsview centeron
WebOct 28, 2014 · To get the scene's centre position, you can use QGraphicsScene::width () and QGraphicsScene::height (): -. // Assuming pScene is a pointer to the QGraphicsScene line->setPos (pScene->width ()/2, pScene->height ()/2); The QGraphicsView is just a window looking into a scene, so it can be smaller than the scene In this case, the item … WebMay 7, 2011 · 1 Answer. Sorted by: 6. You should map your top left corner (0,0) of your viewport to the scene. Width & height are equal to the viewport's rect width & height. To get the rectangle of the current screen try this,: QRect exposedRect (graphicsView.mapToScene (0,0).toPoint (), graphicsView.viewport ()->rect ().size ()); I …
Graphicsview centeron
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WebJul 20, 2012 · 6. I have a custom class derived from QGraphicsView that implements a slot call scrollHorizontal (int dx), inside the code is simply. void CustomView::scrollHorizontal (int dx) { scrollContentsBy (dx, 0); } My problem is, scrolling like this works but doesn't update the scene properly, instead any pixels found on the edge of the view are ... WebPython QGraphicsScene.addText - 36 examples found. These are the top rated real world Python examples of PyQt5.QtWidgets.QGraphicsScene.addText extracted from open source projects. You can rate examples to help us improve the quality of examples.
Web项目位于其自己的局部坐标系中。它们的坐标通常以中心点 (0, 0) 为中心,这也是所有变换的中心。项目坐标系中的几何基元通常称为项目点、项目线或项目矩形。创建自定义项目时,您只需担心项目坐标;QGraphicsScene 和 QGraphicsView 将为您执行所有转换。这使得实现自定义项变得非常容易。 WebcenterOn() 滚动视区的内容以确保场景坐标位置在视图中居中: dargMode() 拖动模式: ensureVisible() 滚动视区的内容,以便场景矩形矩形可见。如果无法访问指定的矩形,则内容将滚动到最近的有效位置。两个边距的默认值均为 50 像素: fitlnView()
Web我最初在QGraphicsView加載圖像並使用此方法進行基本縮小和放大功能。 但是,我無法使用Graphics_view_zoom類的eventFilter函數中的mapToScene功能檢索實際圖像像素位置。 下面的代碼產生的行為與Windows照片查看器僅縮放選定區域完全相同。 MapToScene()返回與鼠標事件位置相同的Point 。 Webスクロール バーを使用するか、centerOn を呼び出して、シーンの任意の位置に明示的にスクロールできます。ポイントをcenterOn に渡すことにより、QGraphicsView はそのビューポートをスクロールして、ポイントがビューの中央に配置されるようにします。
WebJan 28, 2016 · 3 Answers Sorted by: 1 Moving the view assumes that it's smaller than its scene. If they're the same size, it won't move. QGraphicsView can be set to centerOn any position in scene coordinates. Use a timer to call centerOn to move the view one frame at a time. Here's a working example: -
WebOct 18, 2024 · centerOn(x, y) : 将QGraphicsView窗口中的指定坐标点(x,y)设置为QGraphicsView窗口的中心点。 例如: 如果QGraphicsScene窗口位于QGraphicsView … imdb my life is murder season 2WebPyQt Examples(PyQt各种测试和例子) PyQt4 PyQt5. Contribute to PyQt5/PyQt development by creating an account on GitHub. imdb mutiny on the bountyWeb\ingroup graphicsview-api: QGraphicsView visualizes the contents of a QGraphicsScene in a scrollable: viewport. To create a scene with geometrical items, see QGraphicsScene's: ... scroll bars, or by calling centerOn(). By passing a point to centerOn(), QGraphicsView will scroll its viewport to ensure that the point is: list of medicines not allowed in turkeyWebApr 24, 2012 · ui->graphicsView->centerOn (lnk); Now, I would like the view to scroll smoothly to the location of the item (like google maps for example). Looking-up with google and stackoverflow, I found some solutions but all … imdb my heroWebuse view.setCacheMode (QGraphicsView::CacheNone); but it may reduce performance use invalidate (const QRectF & rect = QRectF (), SceneLayers layers = AllLayers) on your background layer each time you need. Even if the second one is a bit trickier to implement, I would recommend it for sake of performance and CPU laziness. Share Improve this answer imdb my christmas family treeWebThese are the top rated real world Python examples of PyQt5.QtWidgets.QGraphicsView extracted from open source projects. You can rate examples to help us improve the quality of examples. Programming Language: Python. Namespace/Package Name: PyQt5.QtWidgets. Class/Type: QGraphicsView. imdb my foolish heartWeb); QGraphicsView view ( & scene); view. show (); You can explicitly scroll to any position on the scene by using the scroll bars, or by calling centerOn (). By passing a point to centerOn (), QGraphicsView will scroll its viewport to ensure that the point is centered in the view. imdb my life in ruins