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I am creating a simple Image Editing tool to draw a shape on image using Qt. I can load Image to QGraphicsView. I tried sub classing QGraphicsScene and override mouse press event. But don't know how to draw a line on the image where the mouse pressed.

How to draw a line or any text on a Bitmap image using Qt
Posted 17-Jul-12 22:09pm
Amarnath S 18-Jul-12 23:52pm
A quick search for "qt rubber band line" yields these results:

See also:

In the above, they have drawn a rectangle, you need to modify this to draw a line. Also make sure that you're painting the bitmap before drawing the line, so this gives the appearance that the line is drawn on the image. A similar method for drawing text.

To achieve a flicker-free performance, you need to do double-buffering:
Arun Kumar K S 18-Jul-12 23:55pm
Surewly I will check your suggestion.., But I need to save the new image
Amarnath S 19-Jul-12 0:15am
Look at this example:

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