Board index » cppbuilder » Cross over Image

2005-06-03 08:47:37 PM
cppbuilder96
Hi all,
I have an Image in a TPaintBox and I want draw a rectangle that move on
MouseMove
my source code:
PB1->Canvas->Pen->Color = clBlack;
PB1->Canvas->Pen->Style = psDot;
PB1->Canvas->Pen->Width = 2;
PB1->Canvas->Pen->Mode = pmNotXor;
PB1->Canvas->Brush->Style = bsClear;
// Cancel previous
PB1->Canvas->Brush->Color = clMedGray;
PB1->Canvas->FillRect(Rect(0,0,maxX,maxY));
//Redesign
DrawRectangle ......
but on Mouse move the image is not clear and the redesign is slow. The
cancel routine is slow?
There is another system to render the image to fast?
Thanks,
Antonio Cava
 

Antonio Cava wrote:
do not mean a TImage. So you have a drawing in a TPaintBox
and you draw a rectangle while moving the mouse ?
Why ? If you move around a rectangle you only
should draw again those four lines. That does not take
time.
the image.
image not clear ?
cancel routine ?
Hans.