Question

How can I draw a rectangle on an my wx.StaticBitmap image called “bitmap_1” using a dc.Rectangle? I have co-ordinates((754, 483)) on where the rectangle must be drawn.

dc.DrawRectangle(10, 10, 200, 200)` this gives an error

Traceback (most recent call last):
  File "C:\Users\Foster\Documents\Roland\ims project\newtagging2.py", line 129, in OnImageMouseOver
NameError: global name 'dc' is not defined

Answer 1

The error is because you haven’t defined what dc is.

You want to take a look at wxMemoryDC.

MemoryDC creates a DC that can be used to draw to bitmaps in memory (as opposed to the display)

You’ll want to draw on bitmap_1 before passing it to StaticBitmap like this:

dc= wx.MemoryDC(bitmap_1)
dc.DrawRectangle(10,10,200,200)
dc.SelectObject(wx.NullBitmap) #This de-selects the bitmap

This article should help you using DCs as well.