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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
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<!-- BEGIN TITLE -->
<title>BufferedWindows - /main.c</title>
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<script language="JavaScript">
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window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
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<body>
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<center>
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<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/LegacyTechnologies/index.html">Legacy Documents</a> > <a href="../../samplecode/LegacyTechnologies/idxCarbon-date.html">Carbon</a> > <A HREF="javascript:location.replace('index.html');">BufferedWindows</A> >
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<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">BufferedWindows</div></h1></td>
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<td id="scdetails">
<h2>/main.c</h2>
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<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/main.c</option></select>
</p>
</form>
<p><strong><a href="BufferedWindows.zip">Download Sample</a></strong> (“BufferedWindows.zip”, 31.3K)<BR>
<strong><a href="BufferedWindows.dmg">Download Sample</a></strong> (“BufferedWindows.dmg”, 90.4K)</p>
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<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
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<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
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<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">/*
File: main.c
Contains: A sample that demonstrates the use of QDFlushPortBuffer when dealing with
Buffered windows under Mac OS X.
Written by: Karl Groethe
Copyright: Copyright © 2000 by Apple Computer, Inc., All Rights Reserved.
You may incorporate this Apple sample source code into your program(s) without
restriction. This Apple sample source code has been provided "AS IS" and the
responsibility for its operation is yours. You are not permitted to redistribute
this Apple sample source code as "Apple sample source code" after having made
changes. If you're going to re-distribute the source, we require that you make
it clear in the source that the code was descended from Apple sample source
code, but that you've made changes.
Change History (most recent first):
9/00 Created
*/
#include <Carbon/Carbon.h>
#include <pthread.h>
#define kWindowWidth 300
#define kWindowHeight 300
#define kMaxVelocity 5
#define kBallSize 16
void* AnimationThread(void* input);
int main(int argc, char* argv[])
{
IBNibRef nibRef;
pthread_t Animation;
CreateNibReference(CFSTR("main"), &nibRef);
SetMenuBarFromNib(nibRef, CFSTR("MainMenu"));
DisposeNibReference(nibRef);
//start an animation thread for our windows
pthread_create(&Animation,NULL,AnimationThread,NULL);
RunApplicationEventLoop();
pthread_cancel(Animation);//tell thread to stop animating
pthread_join(Animation,NULL);//wait for the thread to stop
return 0;
}
void* AnimationThread(void* input)
{
/*------------------------------------------------------
A thread for doing all our animation
--------------------------------------------------------*/
#pragma unused(input)
const Rect defaultBounds={100,100,100+kWindowHeight,100+kWindowWidth};
const RGBColor kBallColor={0x0,0x0,0xD400};//blue
WindowRef BufferedWindow, BufferedWindowWithFlush;
RgnHandle visibleRgn=NewRgn();
Rect BallRect={kBallSize,kBallSize,2*kBallSize,2*kBallSize};
Point BallVelocity={Random()%kMaxVelocity+1,Random()%kMaxVelocity+1};
CreateNewWindow (kDocumentWindowClass,
kWindowStandardHandlerAttribute,
&defaultBounds,
&BufferedWindow);
SetWindowTitleWithCFString(BufferedWindow,CFSTR("no flush"));
CreateNewWindow (kDocumentWindowClass,
kWindowStandardHandlerAttribute,
&defaultBounds,
&BufferedWindowWithFlush);
SetWindowTitleWithCFString(BufferedWindowWithFlush,CFSTR("Flush"));
ShowWindow(BufferedWindow);
ShowWindow(BufferedWindowWithFlush);
while(TRUE)//loop until thread is canceled
{
Rect animationBounds;
GrafPtr origPort;
GetPort(&origPort);
SetPortWindowPort(BufferedWindow);
GetPortBounds(GetWindowPort(BufferedWindow),&animationBounds);
if(BallRect.top<animationBounds.top||BallRect.bottom>animationBounds.bottom)
BallVelocity.v=-BallVelocity.v;
if(BallRect.left<animationBounds.left || BallRect.right>animationBounds.right)
BallVelocity.h=-BallVelocity.h;
OffsetRect(&BallRect,BallVelocity.h,BallVelocity.v);
//draw in the window we don't flush
EraseRect(&animationBounds);
RGBForeColor(&kBallColor);
PaintOval(&BallRect);
//switch to the window we're going to flush
SetPortWindowPort(BufferedWindowWithFlush);
EraseRect(&animationBounds);
RGBForeColor(&kBallColor);
PaintOval(&BallRect);
//we flush the window buffer by passing the window and its visible region
QDFlushPortBuffer(GetWindowPort(BufferedWindowWithFlush),
GetPortVisibleRegion(GetWindowPort(BufferedWindowWithFlush),visibleRgn));
SetPort(origPort);
pthread_testcancel();//see if we want to quit
usleep(10000);//sleep for a bit
}
}
</pre>
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/BufferedWindows/listing1.html%3Fid%3DDTS10000489-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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