Tag：Concentric circle
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Use qgraphicsitem to customize item box components such as concentric circles, rotating rectangles, and arrows
1. Background In the process of visual project development, I met the needs of image display and ROI rectangular box or other box display. At the earliest time, I directly pasted the display window of Halcon on the control of QT, In this way, the operation of drawing after image conversion is omitted (Halcon has […]
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Canvas Getting Started Guide (II) – how to use canvas to draw a funny picture
Previously on:Canvas Getting Started Guide Toolset address Final rendering: course Get canvas object Get context object Add a little detail be accomplished Analysis of the above figure shows that they are basically circular arcs. This painting can be done by setting several concentric circles and splicing several arcs. General outline First, set the fill color. […]