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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>
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<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/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxHumanInterfaceToolbox-date.html">Human Interface Toolbox</a> > <A HREF="javascript:location.replace('index.html');">WindowFun</A> >
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<td><h1><div id="pagehead">WindowFun</div></h1></td>
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<h2>/WindowFun.c</h2>
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<p><strong><a href="WindowFun.zip">Download Sample</a></strong> (“WindowFun.zip”, 108.0K)<BR>
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<pre class="sourcecodebox">/*
File: WindowFun.c
Contains: This sample demonstrates how to:
Create an arbitrary number of window layers within your application
Display an overlay window which is attached to the main window
A method of drawing transparent lines by drawing to an overlay window
How to display the "Poof" the toolbar uses.
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Copyright © 2003 Apple Computer, Inc., All Rights Reserved
*/
#include <Carbon/Carbon.h>
#include "WindowFun.h"
// Keep a reference to the overlay window available to the "normal" windows
struct WindowStorage
{
WindowRef overlayWindow;
};
typedef struct WindowStorage WindowStorage;
static void DisplaySimpleWindow( void );
static pascal OSStatus AppEventEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData );
static pascal OSStatus SimpleWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData );
void OpenFiles();
void PoofItGood( Point centerPt );
void LineTool( WindowRef window );
static void CreateOverlayWindow( WindowRef window );
static pascal OSStatus OverlayWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData );
GlobalAppInfo g; // Globals
static OSErr InitializeApplication( void )
{
OSErr err;
static const EventTypeSpec sApplicationEvents[] = { { kEventClassCommand, kEventCommandProcess } };
BlockZero( &g, sizeof(g) );
g.mainBundle = CFBundleGetMainBundle();
if ( g.mainBundle == NULL ) { err = -1; goto Bail; }
err = CreateNibReferenceWithCFBundle( g.mainBundle, CFSTR("WindowFun"), &g.mainNib );
if ( err != noErr ) goto Bail;
if ( g.mainNib == NULL ) { err = -1; goto Bail; }
err = SetMenuBarFromNib( g.mainNib, CFSTR("MenuBar") );
if ( err != noErr ) goto Bail;
InstallApplicationEventHandler( NewEventHandlerUPP(AppEventEventHandlerProc), GetEventTypeCount(sApplicationEvents), sApplicationEvents, 0, NULL );
// Force the document group to be created first, so we can position our groups between the floating and document groups
(void) GetWindowGroupOfClass( kDocumentWindowClass );
// Create our default WindowGroups and set their z-order
err = CreateWindowGroup( 0, &g.windowGroups[0] );
err = CreateWindowGroup( 0, &g.windowGroups[1] );
err = CreateWindowGroup( 0, &g.windowGroups[2] );
// Position our groups behind the floating group and in front of the document group
SendWindowGroupBehind( g.windowGroups[2], GetWindowGroupOfClass( kDocumentWindowClass ) );
SendWindowGroupBehind( g.windowGroups[1], g.windowGroups[2] );
SendWindowGroupBehind( g.windowGroups[0], g.windowGroups[1] );
Bail:
return( err );
}
int main( void )
{
OSErr err;
err = InitializeApplication();
if ( err != noErr ) goto Bail;
SendCommandProcessEvent( kHICommandNew ); // Send a kHICommandNew to ourselves to create a default new window
RunApplicationEventLoop();
Bail:
if ( g.mainNib != NULL ) DisposeNibReference( g.mainNib );
if ( g.mainBundle != NULL ) CFRelease( g.mainBundle );
return( noErr );
}
static void DisplaySimpleWindow( void )
{
OSErr err;
WindowRef window;
WindowStorage *windowStorage;
WindowGroupRef windowGroup;
static EventHandlerUPP simpleWindowEventHandlerUPP;
const EventTypeSpec windowEvents[] =
{
{ kEventClassCommand, kEventCommandProcess },
{ kEventClassWindow, kEventWindowClickContentRgn },
{ kEventClassWindow, kEventWindowBoundsChanging },
{ kEventClassWindow, kEventWindowBoundsChanged },
{ kEventClassWindow, kEventWindowClose }
};
err = CreateWindowFromNib( g.mainNib, CFSTR("MainWindow"), &window );
if ( (err != noErr) || (window == NULL) ) goto Bail;
if ( simpleWindowEventHandlerUPP == NULL ) simpleWindowEventHandlerUPP = NewEventHandlerUPP( SimpleWindowEventHandlerProc );
err = InstallWindowEventHandler( window, simpleWindowEventHandlerUPP, GetEventTypeCount(windowEvents), windowEvents, window, NULL );
windowStorage = (WindowStorage*) NewPtrClear( sizeof(WindowStorage) );
SetWRefCon( window, (long) windowStorage );
err = CreateWindowGroup( kWindowGroupAttrMoveTogether | kWindowGroupAttrLayerTogether | kWindowGroupAttrHideOnCollapse, &windowGroup );
if ( err == noErr ) err = SetWindowGroupParent( windowGroup, g.windowGroups[1] ); // Default group
if ( err == noErr ) err = SetWindowGroup( window, windowGroup );
ShowWindow( window );
Bail:
return;
}
static pascal OSStatus SimpleWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData )
{
#pragma unused ( inCallRef )
HICommand command;
Point pt;
SInt16 value;
Rect r;
WindowGroupRef windowGroup;
WindowGroupAttributes windowGroupAttributes;
UInt32 eventKind = GetEventKind( inEvent );
UInt32 eventClass = GetEventClass( inEvent );
WindowRef window = (WindowRef) inUserData;
OSStatus err = eventNotHandledErr;
WindowStorage *windowStorage = (WindowStorage*) GetWRefCon( window );
switch ( eventClass )
{
case kEventClassWindow:
if ( eventKind == kEventWindowClose ) // Dispose extra window storage here
{
if ( windowStorage->overlayWindow != NULL ) SendWindowCloseEvent( windowStorage->overlayWindow );
DisposePtr( (Ptr) windowStorage );
}
else if ( eventKind == kEventWindowClickContentRgn )
{
if ( GetControlValueByID( window, 'Butn', 0 ) == 1 ) // If the "Line Tool" button is depressed
{
LineTool( window );
SetControlValueByID( window, 'Butn', 0, 0 ); // Pop the button back up
err = noErr;
}
}
else if ( (eventKind == kEventWindowBoundsChanging) || (eventKind == kEventWindowBoundsChanged) )
{
if ( windowStorage->overlayWindow != NULL ) // Resize the overlay window as well
{
(void) GetEventParameter( inEvent, kEventParamCurrentBounds, typeQDRectangle, NULL, sizeof(Rect), NULL, &r );
SizeWindow( windowStorage->overlayWindow, r.right-r.left, r.bottom-r.top, false );
}
}
break;
case kEventClassCommand:
if ( eventKind == kEventCommandProcess )
{
GetEventParameter( inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(HICommand), NULL, &command );
if ( command.commandID == kHICommandOK ) // Change the window layering and attributes
{
value = GetControlValueByID( window, 'Rdio', 0 ); // Which group was chosen
windowGroupAttributes = 0; // Now set the attributes for the parent group
if ( GetControlValueByID( window, 'Chek', 0 ) == 1 ) windowGroupAttributes |= kWindowGroupAttrMoveTogether;
ChangeWindowGroupAttributes( g.windowGroups[value-1], windowGroupAttributes, ~windowGroupAttributes );
windowGroupAttributes = kWindowGroupAttrMoveTogether | kWindowGroupAttrLayerTogether | kWindowGroupAttrHideOnCollapse;
err = CreateWindowGroup( windowGroupAttributes, &windowGroup ); // We can only call SetWindowGroupParent() on an empty group, so create a new one
if ( err == noErr ) err = SetWindowGroupParent( windowGroup, g.windowGroups[value-1] ); // Set the new parent
if ( (err == noErr) && (windowStorage->overlayWindow != NULL) )
err = SetWindowGroup( windowStorage->overlayWindow, windowGroup ); // FIRST add the overlay window so that it is on top of the "normal" window
if ( err == noErr )
{
ReleaseWindowGroup( GetWindowGroup(window) ); // Release the old group
err = SetWindowGroup( window, windowGroup ); // Add the window to the new group
}
}
else if ( command.commandID == 'GAtr' ) // Get the window attributes
{
windowGroup = GetWindowGroupParent( GetWindowGroup(window) );
GetWindowGroupAttributes( windowGroup, &windowGroupAttributes );
SetControlValueByID( window, 'Chek', 0, ((windowGroupAttributes & kWindowGroupAttrMoveTogether) != 0) );
if ( windowGroup == g.windowGroups[0] ) SetControlValueByID( window, 'Rdio', 0, 1 );
else if ( windowGroup == g.windowGroups[1] ) SetControlValueByID( window, 'Rdio', 0, 2 );
else SetControlValueByID( window, 'Rdio', 0, 3 );
}
else if ( command.commandID == 'Poof' )
{
SetPortWindowPort( window );
GetMouse( &pt );
LocalToGlobal( &pt );
pt.v -= 50; // Draw the Poof 50 pixels above the mouse
PoofItGood( pt );
}
else if ( command.commandID == 'Over' )
{
if ( windowStorage->overlayWindow == NULL )
{
CreateOverlayWindow( window );
}
else
{
SendWindowCloseEvent( windowStorage->overlayWindow );
}
}
}
break;
}
return( err );
}
// Creates an overlay window which will move with its parent. This technique is typical for doing things like drawing on top of movies,
// creating selection rectangles, drawing on top of GL windows, etc.
static void CreateOverlayWindow( WindowRef window )
{
OSStatus err;
Rect windowRect;
WindowStorage *windowStorage = (WindowStorage*) GetWRefCon( window );
WindowAttributes overlayAttributes = kWindowNoShadowAttribute | kWindowIgnoreClicksAttribute | kWindowNoActivatesAttribute | kWindowStandardHandlerAttribute;
static EventHandlerUPP overlayWindowEventHandlerUPP;
const EventTypeSpec windowEvents[] =
{
{ kEventClassWindow, kEventWindowBoundsChanged },
{ kEventClassWindow, kEventWindowShown },
{ kEventClassWindow, kEventWindowClose }
};
SetPortWindowPort( window );
GetWindowPortBounds( window, &windowRect );
LocalToGlobalRect( &windowRect ); // Window to be size of window it lies on
err = CreateNewWindow( kOverlayWindowClass, overlayAttributes, &windowRect, &windowStorage->overlayWindow );
if ( err != noErr ) goto Bail;
SetWindowGroup( windowStorage->overlayWindow, GetWindowGroup(window) ); // Put them in the same group so that their window layers are consistent
if ( overlayWindowEventHandlerUPP == NULL ) overlayWindowEventHandlerUPP = NewEventHandlerUPP( OverlayWindowEventHandlerProc );
err = InstallWindowEventHandler( windowStorage->overlayWindow, overlayWindowEventHandlerUPP, GetEventTypeCount(windowEvents), windowEvents, windowStorage, NULL );
ShowWindow( windowStorage->overlayWindow );
Bail:
return;
}
static pascal OSStatus OverlayWindowEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData )
{
#pragma unused( inCallRef )
Rect windowRect;
CGRect box;
CGContextRef cgContext;
UInt32 eventKind = GetEventKind( inEvent );
UInt32 eventClass = GetEventClass( inEvent );
OSStatus err = eventNotHandledErr;
WindowStorage *windowStorage = (WindowStorage*) inUserData;
switch ( eventClass )
{
case kEventClassWindow:
if ( eventKind == kEventWindowClose )
{
windowStorage->overlayWindow = NULL; // Let the default handler DisposeWindow() for us, just set our WindowRef to NULL
}
else if ( (eventKind == kEventWindowBoundsChanged) || (eventKind == kEventWindowShown) ) // Draw the overlay window
{
GetWindowPortBounds( windowStorage->overlayWindow, &windowRect );
//box.origin.x = box.origin.y = 0;
//box.size.width = windowRect.right - windowRect.left;
//box.size.height = windowRect.bottom - windowRect.top;
box = CGRectMake( 0, 0, windowRect.right - windowRect.left, windowRect.bottom - windowRect.top );
QDBeginCGContext( GetWindowPort(windowStorage->overlayWindow), &cgContext );
CGContextClearRect( cgContext, box );
// Paint a semi-transparent box in the middle of our window
box.origin.x = (windowRect.right - windowRect.left) / 4;
box.size.width = (windowRect.right - windowRect.left) / 2;
CGContextSetRGBFillColor( cgContext, 0.5, 0.75, 0.75, 0.2 );
CGContextFillRect( cgContext, box );
CGContextFlush( cgContext );
QDEndCGContext( GetWindowPort(windowStorage->overlayWindow), &cgContext );
}
break;
}
return( err );
}
static pascal OSStatus AppEventEventHandlerProc( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData )
{
#pragma unused ( inCallRef, inUserData )
HICommand command;
OSStatus err = eventNotHandledErr;
UInt32 eventClass = GetEventClass( inEvent );
UInt32 eventKind = GetEventKind(inEvent);
switch ( eventClass )
{
case kEventClassCommand:
GetEventParameter( inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(HICommand), NULL, &command );
if ( eventKind == kEventCommandProcess )
{
if ( command.commandID == kHICommandNew )
{
DisplaySimpleWindow();
}
else if ( command.commandID == kHICommandOpen ) // Open... menu choice
{
OpenFiles();
}
}
break;
}
return( err );
}
void OpenFiles()
{
NavReplyRecord reply;
OSErr err;
long i, n;
FSSpec spec;
AEKeyword keyWd;
DescType typeCd;
Size actSz;
NavDialogOptions navDialogOptions;
NavGetDefaultDialogOptions( &navDialogOptions );
navDialogOptions.dialogOptionFlags |= ( kNavDontResolveAliases + kNavSupportPackages );
err = NavChooseFile( NULL, &reply, &navDialogOptions, NULL, NULL, NULL, NULL, NULL );
if ( err != noErr ) goto Bail;
if ( !reply.validRecord ) { err = userCanceledErr; goto Bail; }
err = AECountItems( &reply.selection, &n );
if ( err != noErr ) goto Bail;
for ( i = 1 ; i <= n; i++ )
{
err = AEGetNthPtr( &reply.selection, i, typeFSS, &keyWd, &typeCd, (Ptr) &spec, sizeof(spec), (actSz = sizeof(spec), &actSz) );
if ( err != noErr ) goto Bail;
//XXX Do Something with spec
SysBeep( 0 );
}
Bail:
return;
}
// ================================================================================
// The Line Tool
// ================================================================================
void LineTool( WindowRef window )
{
OSStatus err;
Point endPt;
MouseTrackingResult trackingResult;
Point beginPt;
Rect windowRect;
WindowRef overlayWindow;
CGRect cgRect;
CGContextRef cgContext;
Boolean isStillDown = true;
SetThemeCursor( kThemeCrossCursor );
SetPortWindowPort( window );
GetWindowPortBounds( window, &windowRect );
LocalToGlobalRect( &windowRect );
(void) CreateNewWindow( kOverlayWindowClass, kWindowHideOnSuspendAttribute | kWindowIgnoreClicksAttribute, &windowRect, &overlayWindow );
SetPortWindowPort( overlayWindow );
SetWindowGroup( overlayWindow, GetWindowGroup(window) ); // This assures we draw into the same layer as the window
ShowWindow( overlayWindow );
GetMouse( &beginPt );
cgRect = CGRectMake( 0, 0, windowRect.right - windowRect.left+1, windowRect.bottom - windowRect.top+1 );
CreateCGContextForPort( GetWindowPort(overlayWindow), &cgContext );
CGContextSetLineWidth( cgContext, 3 ); // Line is 3 pixels wide
CGContextSetRGBStrokeColor( cgContext, 1.0, .45, .3, .4 ); // Make it orange with alpha = 0.4
SyncCGContextOriginWithPort( cgContext, GetWindowPort(overlayWindow) );
CGContextTranslateCTM( cgContext, 0, windowRect.bottom - windowRect.top ); // Flip & rotate the context to use QD coordinates
CGContextScaleCTM( cgContext, 1.0, -1.0 );
do
{
err = TrackMouseLocation( GetWindowPort(window), &endPt, &trackingResult );
switch ( trackingResult )
{
case kMouseTrackingMouseDragged:
CGContextClearRect( cgContext, cgRect ); // "Erase" the window
#if ( 1 )
CGContextMoveToPoint( cgContext, beginPt.h, beginPt.v ); // Draw the line
CGContextAddLineToPoint( cgContext, endPt.h, endPt.v );
CGContextStrokePath( cgContext );
#else
MoveTo( beginPt.h, beginPt.v ); // We could use QuickDraw and draw opaque lines
LineTo( endPt.h, endPt.v );
#endif
CGContextFlush( cgContext ); // Flush our drawing to the screen
break;
case kMouseTrackingMouseDown:
break;
case kMouseTrackingMouseUp:
case kMouseTrackingUserCancelled:
isStillDown = false;
break;
}
} while( isStillDown == true );
CGContextRelease( cgContext );
DisposeWindow( overlayWindow );
SetThemeCursor( kThemeArrowCursor );
return;
}
// ================================================================================
// The "Poof" Effect
// ================================================================================
#define POOF_ICON_WIDTH 42.0
#define POOF_ICON_HEIGHT 52.0
#define POOF_ANIMATION_DELAY (1.0 / 15.0)
#define NUMBER_OF_POOF_ANIM_FRAMES 5
//ApplicationServices.framework
//CGImageRef CGImageCreateWithPNGDataProvider(CGDataProviderRef source, const float decode[], bool shouldInterpolate, CGColorRenderingIntent intent);
static CGImageRef GetThePoofImage()
{
CGDataProviderRef provider;
CFStringRef fileName = NULL;
CGImageRef image = NULL;
CFURLRef url = NULL;
CFBundleRef appBundle = CFBundleGetMainBundle();
if ( appBundle == NULL ) goto Bail;
fileName = CFStringCreateWithCString( NULL, "ToolbarPoof.png", kCFStringEncodingASCII ); // ToolbarPoof.png is in our Resources directory within the bundle
if ( fileName == NULL ) goto Bail;
url = CFBundleCopyResourceURL( appBundle, fileName, NULL, NULL );
if ( url == NULL ) goto Bail;
provider = CGDataProviderCreateWithURL( url );
image = CGImageCreateWithPNGDataProvider( provider, NULL, false, kCGRenderingIntentDefault );
CGDataProviderRelease( provider );
Bail:
if ( fileName != NULL ) CFRelease( fileName );
if ( url != NULL ) CFRelease( url );
return( image );
}
void PoofItGood( Point centerPt )
{
CGRect box;
WindowRef window;
Rect bounds;
CGContextRef context;
CGImageRef image;
float windowWidth;
float windowHeight;
int i;
image = GetThePoofImage();
if ( image == NULL ) goto Bail;
windowWidth = CGImageGetWidth( image ) / NUMBER_OF_POOF_ANIM_FRAMES;
windowHeight = CGImageGetHeight( image );
// Start our animation bounds at the first item in the animation strip
box.origin.x = box.origin.y = 0;
box.size.width = CGImageGetWidth( image );
box.size.height = CGImageGetHeight( image );
bounds.top = centerPt.v - (SInt16)(windowHeight / 2);
bounds.left = centerPt.h - (SInt16)(windowWidth / 2);
bounds.bottom = bounds.top + (SInt16)windowHeight;
bounds.right = bounds.left + (SInt16)windowWidth;
CreateNewWindow( kOverlayWindowClass, 0, &bounds, &window );
CreateCGContextForPort( GetWindowPort( window ), &context );
ShowWindow( window );
for ( i = 1; i <= NUMBER_OF_POOF_ANIM_FRAMES; i++ )
{
CGContextClearRect( context, box );
CGContextDrawImage( context, box, image );
CGContextFlush( context );
Delay( EventTimeToTicks( POOF_ANIMATION_DELAY ), NULL );
box.origin.x -= windowWidth;
}
CGContextRelease( context );
CGImageRelease( image );
DisposeWindow( window );
Bail:
return;
}
</pre>
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