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OrbWorks Community Forum • View topic - draw into buffer, from buffer to screen...

draw into buffer, from buffer to screen...

Discuss and publish sample code and applications written in OrbC (OrbForms Designer or PocketC Architect)

Postby design4use on Sat Jul 13, 2002 7:11 pm

thanks to dewey's help this code is able to draw into a buffer then draw the buffer to the screen (discussion from the Orbworks forum):
// gadget declaration

object myGadget {
// A UIGadget must always be the first member of a gadget
UIGadget gadget;
Draw draw;
// default event handlers
void onopen();
void ondraw();

void testDraw();
};


void myGadget.onopen() {
// attach Draw to gadget
draw.attachGadget(gadget);
}

void myGadget.ondraw() {
// call test function
testDraw();
}

void myGadget.testDraw() {
int prev, i;
Draw dBuffer;//buffer is now local
//create a buffer the size of gadget
dBuffer.copyGadget(gadget);

//draw things into the buffer
dBuffer.begin();
prev = dBuffer.fg(10);
dBuffer.line(clrFG, 10, 10, 50, 50);
dBuffer.frame(clrFG,1,1,gadget.w, gadget.h, 2, 2);
dBuffer.end();

//blast the buffer contents to the screen
draw.begin();
draw.draw(dBuffer, 0,0);
draw.end();
dBuffer.release();
}
design4use
 
Posts: 128
Joined: Fri May 10, 2002 3:31 pm

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