qgraphicsitem

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Drawing widgets (such as buttons) over QGraphicsView

How do I draw interactive widgets such as QButtons and Line Edits over a QGraphicsView? For ex, I have selected a region over an image in an image editing app which displays an image with QGraphicsVie[详细]

2023-01-02 06:20 分类：问答
QGraphicsItem repaint

I want to change text color inside a rectangle periodically. Here is my trial: TrainIdBox::TrainIdBox()[详细]

2023-01-01 14:03 分类：问答
QGraphicsItem doesn't receive mouse hover events

I have a class derived from QGraphicsView, which contains QGraphicsItem-derived elements.I want these elements to change color whenever the mouse cursor hovers over them, so I implemented hoverEnterEv[详细]

2023-01-01 08:20 分类：问答
How to draw QGraphicsItem in a MFC view

I\'m starting using Qt in my application. My application is MFC based. I want to draw开发者_开发问答 some QGraphicsItems in my currect MFC view, is it possible?[详细]

2022-12-30 04:56 分类：问答
Container item implementation

I am working in Train Traffic Controller software project. My responsibility in this project is to develop the visual railroad GUI.[详细]

2022-12-29 18:11 分类：问答
Subclassing QGraphicsItemGroup

I have system that has classes derived from Q开发者_StackOverflowGraphicsWidget. I manage derived class objects in layouts on QGraphicsScene. Now I need a compound item that contain two or more QGraph[详细]

2022-12-28 18:09 分类：问答
Qt - invalid conversion to child class

I\'m drawing polygons using the Graphics View framework. I added a polygon to the scene with this: QGraphicsPolygonItem *poly = scene->addPolygon(QPolygonF(vector_of_QPointF));[详细]

2022-12-28 10:49 分类：问答
QGraphicsItem unselect redraw problem

Very simple Qt GUI application: On the scene I have multiple ci开发者_如何学运维rcles implemented as QGraphicsItem[详细]

2022-12-08 17:41 分类：问答