WebJan 4, 2024 · You should avoid re-creating the pixmap, once you have it with the correct size, just memcpy the content of the processed frame into place. You should also avoid calling fitInView from that external thread. GUI operation should only happen in the GUI thread. You're lucky it doesn't crash. 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 。
基于Qt 的graphicsView + opencv显示图片_graphicsview opencv…
WebGraphics View는 많은 수의 맞춤형 2D 그래픽 항목을 관리하고 상호 작용할 수있는 표면과 확대 / 축소 및 회전을 지원하여 항목을 시각화하기위한보기 위젯을 제공합니다. 이 프레임 워크에는 장면의 항목에 대한 정확한 배정도 상호 작용 기능을 허용하는 이벤트 ... Web我可以制作简单的动画作品；在下面的代码中，class MyView在调用时将起作用，但是class GraphicsView未设置动画 谁能帮我看看这个问题吗 问题在于Graphicscene类，我认为： import sys from PyQt4 import QtGui, QtCore class MyView(QtGui.QGraphicsView): def … fnb lifestyle trading hours
QT, C++: fast way to draw live image stream from camera on ...
The Graphics View framework consists of 3 main parts QGraphicsView, QGraphicsScene, and QGraphicsItem, each with different responsibilities. The framework can be interpreted using the Model-View paradigm, with the QGraphicsScene as the Model and the QGraphicsView as the View. … See more Let's start by creating a simple scene. The following code creates QGraphicsScene, defining a 400 x 200 scene, and then displays it in a QGraphicsView. If you run this example you'll … See more So far we've been creating items by creating the objects and then adding them to the scene. But you can also create an object in the scene directly by calling one of the helper … See more The QGraphicsView is subclassed from QWidget, meaning it can be placed in layouts just like any other widget. In the followingexample we add the view to a simple interface, with buttons which perform a basic … See more So far we've built a simple scene using the basic QGraphicsRectItem and QGraphicsEllipseItem shapes. Now let's use some other QGraphicsItem objects to build a more complex … See more WebApr 6, 2024 · QGraphicsView* movie_poster = this->findChild ("movie_poster"); QGraphicsScene* scene = new QGraphicsScene (); movie_poster->setScene (scene); QGraphicsPixmapItem* item = new QGraphicsPixmapItem (QPixmap ("C:\Users\Name\Desktop\codes\Qt\MovieDB\titanic.jpg")); scene->addItem (item); … WebJan 29, 2024 · Hi SGaist, Thanks for the warm welcome and the reply. The code that I am using is attached below. #include #include #include #include #include #include class ImageViewerScene : public QGraphicsScene { … fnbli hours