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Solved
Drawing in a window?
Posted on 2000-02-21
Hi there
I would like to display the contents of a matrix in a window.
if I use code like this:
CClientDC dc;
//do drawing
dc.SetPixel(...);
It works of course, but I do not want to draw directly into the window. Instead I would like to draw to a CDC (i guess) and then blt the contents into the window causing all the changes to happen at once instead of one pixel at a time.
I have tried something like this:
CCLientDC dc;
CDC dcMem;
dcMem.CreateCompatibleDC(&
//do drawing
dcMem.SetPixel(...)
dc.BitBlt(0, 0, Width, Height, &dcMem, 0, 0, SRCCOPY);
but it does not work (no change in the window)
How should I do it?
(maybe creating a bitmap - how?)
Jacob
I would like to display the contents of a matrix in a window.
if I use code like this:
CClientDC dc;
//do drawing
dc.SetPixel(...);
It works of course, but I do not want to draw directly into the window. Instead I would like to draw to a CDC (i guess) and then blt the contents into the window causing all the changes to happen at once instead of one pixel at a time.
I have tried something like this:
CCLientDC dc;
CDC dcMem;
dcMem.CreateCompatibleDC(&
//do drawing
dcMem.SetPixel(...)
dc.BitBlt(0, 0, Width, Height, &dcMem, 0, 0, SRCCOPY);
but it does not work (no change in the window)
How should I do it?
(maybe creating a bitmap - how?)
Jacob
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6 Comments
CCLientDC dc;
CDC dcMem;
dcMem.CreateCompatibleDC(&
CBitmap bmp;
bmp.CreateCompatibleBitmap
CBitmap* pOldBmp = dcMem.SelectObject( &bmp );
//do drawing
dcMem.SetPixel(...)
dc.BitBlt(0, 0, Width, Height, &dcMem, 0, 0, SRCCOPY);
dcMem.SelectObject( pOldBmp );
dcMem.DeleteDC();
CDC dcMem;
dcMem.CreateCompatibleDC(&
CBitmap bmp;
bmp.CreateCompatibleBitmap
CBitmap* pOldBmp = dcMem.SelectObject( &bmp );
//do drawing
dcMem.SetPixel(...)
dc.BitBlt(0, 0, Width, Height, &dcMem, 0, 0, SRCCOPY);
dcMem.SelectObject( pOldBmp );
dcMem.DeleteDC();
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