Board index » cppbuilder » How to use SelectClipRgn

2003-09-30 02:00:22 PM
cppbuilder71
Hi, everyone. -o)
I have this simple question about rectangles. What if i have a canvas and i keep on printing on it but i have to cut the image off which is beyond certain margins (the margins are indicated by a rectangle). How do I use SelectClipRgn to do it?
Thanks in advance!
 

OOps ... I think I asked the wrong question. Anyway, now I'm using CopyRect to do it.
"Jean Grey" < XXXX@XXXXX.COM >wrote:

"Jean Grey" < XXXX@XXXXX.COM >wrote in message
certain margins (the margins are indicated by a rectangle). How do I use
SelectClipRgn to do it?
void __fastcall TForm1::Button1Click(TObject *Sender)
{
Graphics::TBitmap* bmp = new Graphics::TBitmap;
bmp->LoadFromFile("C:\\Program Files\\Common Files\\Borland
Shared\\Images\\Splash\\256Color\\Chemical.bmp");
//the dimensions of this file are 240x180
//lets say you want to do a 100x150 region
//with an offset of 20 on the x and 10 on the y
int xOff = 20;
int yOff = 10;
int widthOfRegion = 100;
int heightOfRegion = 150;
//also lets say you want to draw the bmp on the
//mainform with dimensions of 80x90
//with an offest of 60 on the x and 70 on the y of the mainform
int xOff2 = 60;
int yOff2 = 70;
int widthOfRegion2 = 80;
int heightOfRegion2 = 90;
Canvas->CopyRect(
//first rect is destination
TRect(xOff2, yOff2, xOff2 + widthOfRegion2, yOff2 + heightOfRegion2)
//second is canvas of source
,bmp->Canvas
//third is rect of source that you want to copy
,TRect(xOff, yOff, xOff + widthOfRegion, yOff + heightOfRegion)
);
}
 

{smallsort}