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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/">
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<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
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<title>ImageMapView - /ImageMapView/ImageMapView.cp</title>
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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/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxAccessibility-date.html">Accessibility</a> > <A HREF="javascript:location.replace('index.html');">ImageMapView</A> >
</td>
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<!-- START MAIN CONTENT -->
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<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">ImageMapView</div></h1></td>
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<td id="scdetails">
<h2>/ImageMapView/ImageMapView.cp</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<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">/HIFramework/HIFramework.h</option>
<option value="listing2.html">/HIFramework/TCarbonEvent.cp</option>
<option value="listing3.html">/HIFramework/TCarbonEvent.h</option>
<option value="listing4.html">/HIFramework/TEventHandler.cp</option>
<option value="listing5.html">/HIFramework/TEventHandler.h</option>
<option value="listing6.html">/HIFramework/TObject.cp</option>
<option value="listing7.html">/HIFramework/TObject.h</option>
<option value="listing8.html">/HIFramework/TRect.cp</option>
<option value="listing9.html">/HIFramework/TRect.h</option>
<option value="listing10.html">/HIFramework/TView.cp</option>
<option value="listing11.html">/HIFramework/TView.h</option>
<option value="listing12.html">/ImageMapView/FoodPyramid.html</option>
<option value="listing13.html">/ImageMapView/ImageMap.cp</option>
<option value="listing14.html">/ImageMapView/ImageMap.h</option>
<option value="listing15.html">/ImageMapView/ImageMapView.cp</option>
<option value="listing16.html">/ImageMapView/ImageMapView.h</option>
<option value="listing17.html">/ImageMapView/main.cp</option>
<option value="listing18.html">/ImageMapView/Shapes.html</option></select>
</p>
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<p><strong><a href="ImageMapView.zip">Download Sample</a></strong> (“ImageMapView.zip”, 277.8K)<BR>
<strong><a href="ImageMapView.dmg">Download Sample</a></strong> (“ImageMapView.dmg”, 354.8K)</p>
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<!--googleon: index -->
<pre class="sourcecodebox">/*
File: ImageMapView.cp
Project: ImageMapView
Abstract: ImageMapView custom HIView subclass for displaying HTML-like Image Maps,
using the map areas as view parts.
Version: 1.0
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 © 2005 Apple Computer, Inc., All Rights Reserved
*/
#include <Carbon/Carbon.h>
#include "TView.h"
#include "ImageMapView.h"
#include "ImageMap.h"
// -----------------------------------------------------------------------------
// constants
// -----------------------------------------------------------------------------
//
const CFStringRef kImageMapViewClassID = CFSTR( "com.apple.hitoolbox.sample.imagemapview" );
// -----------------------------------------------------------------------------
// TImageMapView declaration
// -----------------------------------------------------------------------------
//
class TImageMapView
: public TView
{
public:
static OSStatus Create(
HIViewRef* outView );
static void RegisterClass();
CFStringRef GetMapName() const
{ return fImageMap->GetMapName(); }
CFStringRef GetSelectedName()
{ return fImageMap->GetName( GetValue() - 1 ); }
OSStatus SetHotSpots(
ImageMapHotSpots inHotSpots );
protected:
// Constructor/Destructor
TImageMapView(
HIViewRef inView );
virtual ~TImageMapView();
virtual OSStatus ControlHit(
ControlPartCode inPart,
UInt32 inModifiers );
virtual void Draw(
RgnHandle inLimitRgn,
CGContextRef inContext );
virtual ControlKind GetKind();
virtual OSStatus GetRegion(
ControlPartCode inPart,
RgnHandle outRgn );
virtual ControlPartCode HitTest(
const HIPoint& inWhere );
virtual OSStatus Initialize(
TCarbonEvent& inEvent );
virtual OSStatus GetOptimalSizeSelf(
HISize* outSize,
float* outBaseLine );
virtual OSStatus HandleEvent(
EventHandlerCallRef inCallRef,
TCarbonEvent& inEvent );
virtual OSStatus SetFocusPart(
ControlPartCode inDesiredFocus,
Boolean inFocusEverything,
ControlPartCode* outActualFocus );
virtual OSStatus TextInput(
TCarbonEvent& inEvent );
// *** These are the method declarations for overriding the accessibility
// methods.
virtual OSStatus GetAccessibleAttributeNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames );
virtual OSStatus GetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute );
virtual OSStatus IsAccessibleNamedAttributeSettable(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName,
Boolean* outIsSettable );
virtual OSStatus SetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute );
virtual OSStatus CopyAccessibleChildAtPoint(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
const HIPoint& inWhere,
CFTypeRef* outChild );
virtual OSStatus GetAccessibleActionNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames );
virtual OSStatus CopyAccessibleNamedActionDescription(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName,
CFStringRef* outDescription );
virtual OSStatus PerformAccessibleNamedAction(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName );
private:
static OSStatus Construct(
HIObjectRef inObjectRef,
TObject** outObject );
CGColorRef GetHiliteFill();
CGColorRef GetRolloverFill();
CGImageRef GetImage() const
{ return fImageMap->GetImage(); }
CFIndex GetPartCount() const
{ return fImageMap->GetCount(); }
CGRect GetPartBounds(
CFIndex inIndex ) const
{ return fImageMap->GetPathBounds( inIndex ); }
CFStringRef GetPartName(
CFIndex inIndex ) const
{ return fImageMap->GetName( inIndex ); }
CGPathRef GetPartPath(
CFIndex inIndex ) const
{ return fImageMap->GetPath( inIndex ); }
ImageMapHotSpots fHotSpots;
CFIndex fCurrentHotSpot;
ImageMap *fImageMap;
};
// -----------------------------------------------------------------------------
// TImageMapView constructor
// -----------------------------------------------------------------------------
//
TImageMapView::TImageMapView(
HIViewRef inView )
: TView( inView )
{
ChangeAutoInvalidateFlags( kAutoInvalidateOnValueChange
| kAutoInvalidateOnHilite
| kAutoInvalidateOnActivate, 0 );
fImageMap = NULL;
fHotSpots = kImageMapHotSpotsInvisible;
fCurrentHotSpot = 0;
}
// -----------------------------------------------------------------------------
// TImageMapView destructor
// -----------------------------------------------------------------------------
//
TImageMapView::~TImageMapView()
{
delete fImageMap;
}
// -----------------------------------------------------------------------------
// Construct
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::Construct(
HIObjectRef inObject,
TObject** outObject )
{
*outObject = new TImageMapView( (HIViewRef) inObject );
return noErr;
}
// -----------------------------------------------------------------------------
// ControlHit
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::ControlHit(
ControlPartCode inPart,
UInt32 inModifiers )
{
SetValue( inPart );
return eventNotHandledErr;
}
// -----------------------------------------------------------------------------
// Create
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::Create(
HIViewRef* outView )
{
OSStatus err;
EventRef event = CreateInitializationEvent();
// Register this class
RegisterClass();
// Make a new instantiation of this class
err = ::HIObjectCreate( kImageMapViewClassID, event, (HIObjectRef*) outView );
ReleaseEvent( event );
return err;
}
// -----------------------------------------------------------------------------
// Draw
// -----------------------------------------------------------------------------
// Here's the fun stuff.
//
void
TImageMapView::Draw(
RgnHandle inLimitRgn,
CGContextRef inContext )
{
TRect bounds = Bounds();
ControlPartCode focusedPart;
CFIndex i;
CGColorRef fillColor;
// This code assumes that the size of the view and the size of the image are the same.
::HIViewDrawCGImage( inContext, bounds, GetImage() );
::HIViewGetFocusPart( GetViewRef(), &focusedPart );
for ( i = 0; i < GetPartCount(); i++ )
{
// Draw hilite, rollover and normal differently
if ( (CFIndex) GetHilite() == i + 1 )
fillColor = GetHiliteFill();
else if ( fHotSpots == kImageMapHotSpotsVisible
|| ( fHotSpots == kImageMapHotSpotsRollover && fCurrentHotSpot == i + 1 ) )
fillColor = GetRolloverFill();
else
fillColor = NULL;
if ( fillColor != NULL )
{
::CGContextSetFillColorWithColor( inContext, fillColor );
::CGContextAddPath( inContext, GetPartPath( i ) );
::CGContextFillPath( inContext );
}
// Draw the focus if the part if focused and the view is active
if ( (CFIndex) focusedPart == i + 1 && IsActive() )
{
HIRect partBounds = GetPartBounds( i );
::HIThemeDrawFocusRect( &partBounds, true, inContext, kHIThemeOrientationNormal );
}
}
}
// -----------------------------------------------------------------------------
// GetKind
// -----------------------------------------------------------------------------
//
ControlKind
TImageMapView::GetKind()
{
const ControlKind kMyKind = { 'IMap', 'IMap' };
return kMyKind;
}
// -----------------------------------------------------------------------------
// GetHiliteFill
// -----------------------------------------------------------------------------
//
CGColorRef
TImageMapView::GetHiliteFill()
{
static CGColorRef sHiliteFill = NULL;
if ( sHiliteFill == NULL )
{
CGColorSpaceRef colorSpace = ::CGColorSpaceCreateDeviceRGB();
float hiliteComponents[] = { 1, 1, 1, 0.75 };
sHiliteFill = ::CGColorCreate( colorSpace, hiliteComponents );
::CFRelease( colorSpace );
}
return sHiliteFill;
}
// -----------------------------------------------------------------------------
// GetRolloverFill
// -----------------------------------------------------------------------------
//
CGColorRef
TImageMapView::GetRolloverFill()
{
static CGColorRef sRolloverFill = NULL;
if ( sRolloverFill == NULL )
{
CGColorSpaceRef colorSpace = ::CGColorSpaceCreateDeviceRGB();
float rolloverComponents[] = { 1, 1, 1, 0.25 };
sRolloverFill = ::CGColorCreate( colorSpace, rolloverComponents );
::CFRelease( colorSpace );
}
return sRolloverFill;
}
// -----------------------------------------------------------------------------
// GetRegion
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::GetRegion(
ControlPartCode inPart,
RgnHandle outRgn )
{
OSStatus err = noErr;
TRect bounds;
Rect qdBounds;
if ( inPart == kControlContentMetaPart
|| inPart == kControlStructureMetaPart
/* || inPart == kControlOpaqueRegionMetaPart */ )
{
bounds = Bounds();
qdBounds = bounds;
// Leave room for focus drawing
::InsetRect( &qdBounds, -3, -3 );
::RectRgn( outRgn, &qdBounds );
}
return err;
}
// -----------------------------------------------------------------------------
// GetOptimalSizeSelf
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::GetOptimalSizeSelf(
HISize* outSize,
float* outBaseLine )
{
#pragma unused( outBaseLine )
if ( outSize )
*outSize = CGSizeMake( ::CGImageGetWidth( GetImage() ), ::CGImageGetHeight( GetImage() ) );
return noErr;
}
// -----------------------------------------------------------------------------
// HandleEvent
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::HandleEvent(
EventHandlerCallRef inCallRef,
TCarbonEvent& inEvent )
{
#pragma unused( inCallRef )
OSStatus err = eventNotHandledErr;
if ( inEvent.GetClass() == kEventClassControl )
{
HIPoint where;
HIViewTrackingAreaRef trackingArea;
HIViewTrackingAreaID id;
switch ( inEvent.GetKind() )
{
case kEventControlTrackingAreaEntered:
inEvent.GetParameter<HIViewTrackingAreaRef>( kEventParamHIViewTrackingArea, typeHIViewTrackingAreaRef, &trackingArea );
inEvent.GetParameter<HIPoint>( kEventParamMouseLocation, typeHIPoint, &where );
verify_noerr( ::HIViewGetTrackingAreaID( trackingArea, &id ) );
fCurrentHotSpot = id;
Invalidate();
break;
case kEventControlTrackingAreaExited:
inEvent.GetParameter<HIViewTrackingAreaRef>( kEventParamHIViewTrackingArea, typeHIViewTrackingAreaRef, &trackingArea );
inEvent.GetParameter<HIPoint>( kEventParamMouseLocation, typeHIPoint, &where );
verify_noerr( ::HIViewGetTrackingAreaID( trackingArea, &id ) );
if ( fCurrentHotSpot == (CFIndex) id )
fCurrentHotSpot = 0;
Invalidate();
break;
}
}
// Not handled, let the parent class have a go at the event
if ( err == eventNotHandledErr )
err = TView::HandleEvent( inCallRef, inEvent );
return err;
}
// -----------------------------------------------------------------------------
// HitTest
// -----------------------------------------------------------------------------
// Check to see if a point hits the view
//
ControlPartCode
TImageMapView::HitTest(
const HIPoint& inWhere )
{
ControlPartCode part = kControlNoPart;
TRect bounds( Bounds() );
if ( bounds.Contains( inWhere ) )
{
HIRect frame = Frame();
CFIndex i;
for ( i = 0; part == kControlNoPart && i < GetPartCount(); i++ )
{
if ( ::CGPathContainsPoint( GetPartPath( i ), NULL, inWhere, true ) )
part = i + 1;
}
}
return part;
}
// -----------------------------------------------------------------------------
// Initialize
// -----------------------------------------------------------------------------
// The control is set up. Do the last minute stuff that needs to be done like
// setting up the images.
//
OSStatus
TImageMapView::Initialize(
TCarbonEvent& inEvent )
{
OSStatus err;
CFStringRef imageName, imageMapName;
CFURLRef imageUrl, mapUrl;
const EventTypeSpec kMouseTrackingEvents[] = {
{ kEventClassControl, kEventControlTrackingAreaEntered },
{ kEventClassControl, kEventControlTrackingAreaExited },
};
CFIndex i;
err = TView::Initialize( inEvent );
require_noerr( err, CantInitializeParent );
// Extract the image and image map names
inEvent.GetParameter( kEventParamImageMapImageName, typeCFStringRef, &imageName );
inEvent.GetParameter( kEventParamImageMapMapName, typeCFStringRef, &imageMapName );
// Make them into resource URLs
imageUrl = ::CFBundleCopyResourceURL( CFBundleGetMainBundle(), imageName, NULL, NULL );
check( imageUrl != NULL );
mapUrl = ::CFBundleCopyResourceURL( CFBundleGetMainBundle(), imageMapName, NULL, NULL );
check( imageUrl != NULL );
// Make a new image map object with those URLs
fImageMap = new ImageMap( imageUrl, mapUrl );
::CFRelease( imageUrl );
::CFRelease( mapUrl );
// Do view-specific initialization here
SetMaximum( GetPartCount() );
// Set up the hot spot tracking areas
for ( i = 0; i < GetPartCount(); i++ )
{
HIRect pathBounds = GetPartBounds( i );
HIShapeRef shape;
HIViewTrackingAreaRef trackingArea;
shape = ::HIShapeCreateWithRect( &pathBounds );
verify_noerr( ::HIViewNewTrackingArea( GetViewRef(), shape, i + 1, &trackingArea ) );
::CFRelease( shape );
}
// Start listening to mouse tracking events
verify_noerr( AddEventTypesToHandler( GetEventHandler(), GetEventTypeCount( kMouseTrackingEvents ),
kMouseTrackingEvents ) );
ActivateInterface( kKeyboardFocus );
// *** Let HIFramework know that we are interested in having the accessibility
// methods called.
ActivateInterface( kAccessibility );
CantInitializeParent:
return err;
}
// -----------------------------------------------------------------------------
// RegisterClass
// -----------------------------------------------------------------------------
// Register this class with the HIObject registry.
//
// This API can be called multiple times, but will only register once.
//
void
TImageMapView::RegisterClass()
{
static bool sRegistered;
if ( !sRegistered )
{
TView::RegisterSubclass( kImageMapViewClassID, Construct );
sRegistered = true;
}
}
// -----------------------------------------------------------------------------
// SetHotSpots
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::SetHotSpots(
ImageMapHotSpots inHotSpots )
{
fHotSpots = inHotSpots;
Invalidate();
return noErr;
}
// -----------------------------------------------------------------------------
// SetFocusPart
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::SetFocusPart(
ControlPartCode inDesiredFocus,
Boolean inFocusEverything,
ControlPartCode* outActualFocus )
{
ControlPartCode currentFocus;
OSStatus err = noErr;
HIViewGetFocusPart( GetViewRef(), &currentFocus );
if ( inFocusEverything )
{
switch ( inDesiredFocus )
{
case kControlFocusNextPart:
if ( currentFocus == kControlNoPart )
inDesiredFocus = 1;
else if ( (CFIndex) currentFocus == GetPartCount() )
inDesiredFocus = kControlNoPart;
else
inDesiredFocus = currentFocus + 1;
break;
case kControlFocusPrevPart:
if ( currentFocus == kControlNoPart )
inDesiredFocus = GetPartCount();
else if ( currentFocus == 1 )
inDesiredFocus = kControlNoPart;
else
inDesiredFocus = currentFocus - 1;
break;
// default:
// Focus part is being set manually
}
// if the focus changes, make sure we redraw
if ( currentFocus != inDesiredFocus )
Invalidate();
*outActualFocus = inDesiredFocus;
}
return err;
}
// -----------------------------------------------------------------------------
// TextInput
// -----------------------------------------------------------------------------
//
OSStatus
TImageMapView::TextInput(
TCarbonEvent& inEvent )
{
OSStatus err = eventNotHandledErr;
if ( inEvent.GetKind() == kEventTextInputUnicodeForKeyEvent )
{
UniChar uch = 0;
inEvent.GetParameter<UniChar>( kEventParamTextInputSendText, typeUnicodeText, &uch );
if ( uch == kSpaceCharCode )
{
ControlPartCode currentFocus;
::HIViewGetFocusPart( GetViewRef(), &currentFocus );
::HIViewSimulateClick( GetViewRef(), currentFocus, 0, NULL );
err = noErr;
}
}
return err;
}
// *** The implementations of the overridden accessibility methods.
// (please note that there is limited error checking in the code to simplify it)
// -----------------------------------------------------------------------------
// GetAccessibleAttributeNames
// -----------------------------------------------------------------------------
// Read about kEventAccessibleGetAllAttributeNames in CarbonEvents.h to
// understand what the appended values mean for this implementation.
//
OSStatus
TImageMapView::GetAccessibleAttributeNames(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFMutableArrayRef outNames )
{
OSStatus err = eventNotHandledErr;
if ( inIdentifier == 0 )
{
// Identifier 0 means "the whole view".
CallNextEventHandler( inCallRef, inEvent );
// Let accessibility know that this view has children and can
// return a list of them.
CFArrayAppendValue( outNames, kAXChildrenAttribute );
err = noErr;
}
else if ( (CFIndex) inIdentifier <= GetPartCount() )
{
// Identifier > 0 means "sub elements of the view" -- in this case, parts.
CallNextEventHandler( inCallRef, inEvent );
// Let accessibility know that this view's children can return description,
// size, position, parent window, top level element and isFocused attributes.
CFArrayAppendValue( outNames, kAXDescriptionAttribute );
CFArrayAppendValue( outNames, kAXSizeAttribute );
CFArrayAppendValue( outNames, kAXPositionAttribute );
CFArrayAppendValue( outNames, kAXWindowAttribute );
CFArrayAppendValue( outNames, kAXTopLevelUIElementAttribute );
CFArrayAppendValue( outNames, kAXFocusedAttribute );
err = noErr;
}
return err;
}
// -----------------------------------------------------------------------------
// GetAccessibleNamedAttribute
// -----------------------------------------------------------------------------
// Read about kEventAccessibleGetNamedAttribute in CarbonEvents.h to
// understand what the output event parameters mean for this implementation.
//
OSStatus
TImageMapView::GetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute )
{
OSStatus err = eventNotHandledErr;
if ( inIdentifier == 0 )
{
// String compare the incoming attribute name and return the appropriate accessibility
// information as an event parameter.
if ( CFStringCompare( inAttribute, kAXChildrenAttribute, 0 ) == kCFCompareEqualTo )
{
// Create and return an array of AXUIElements describing the children of this view.
CFMutableArrayRef children;
AXUIElementRef child;
CFIndex i;
children = CFArrayCreateMutable( kCFAllocatorDefault, GetPartCount(), &kCFTypeArrayCallBacks );
for ( i = 0; i < GetPartCount(); i++ )
{
child = AXUIElementCreateWithHIObjectAndIdentifier( GetObjectRef(), i + 1 );
CFArrayAppendValue( children, child );
CFRelease( child );
}
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( children ), &children );
CFRelease( children );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXRoleAttribute, 0 ) == kCFCompareEqualTo )
{
// Return a string indicating the role of this view. Use the system group role.
CFStringRef role = kAXGroupRole;
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( role ), &role );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXRoleDescriptionAttribute, 0 ) == kCFCompareEqualTo )
{
// Return a string describing the role of this view. Use the system group role description.
CFStringRef roleDesc = HICopyAccessibilityRoleDescription( kAXGroupRole, NULL );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( roleDesc ), &roleDesc );
CFRelease( roleDesc );
err = noErr;
}
}
else if ( (CFIndex) inIdentifier <= GetPartCount() )
{
if ( CFStringCompare( inAttribute, kAXDescriptionAttribute, 0 ) == kCFCompareEqualTo )
{
// Return a string describing this part of the view. Use the part name retrieved from the image map.
CFStringRef description = GetPartName( inIdentifier - 1 );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( description ), &description );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXParentAttribute, 0 ) == kCFCompareEqualTo )
{
// Return the parent of this part. It's always the view.
AXUIElementRef parent;
parent = AXUIElementCreateWithHIObjectAndIdentifier( GetObjectRef(), 0 );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( parent ), &parent );
CFRelease( parent );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXRoleAttribute, 0 ) == kCFCompareEqualTo )
{
// Return a string indicating the role of this part. The parts of the view behave like
// buttons, so use that system role.
CFStringRef role = kAXButtonRole;
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( role ), &role );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXRoleDescriptionAttribute, 0 ) == kCFCompareEqualTo )
{
// Return a string describing the role of this part. Use the system description.
CFStringRef roleDesc = HICopyAccessibilityRoleDescription( kAXButtonRole, NULL );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( roleDesc ), &roleDesc );
CFRelease( roleDesc );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXSizeAttribute, 0 ) == kCFCompareEqualTo )
{
// Return the size of this part as an HISize.
HIRect partBounds = GetPartBounds( inIdentifier - 1 );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeHISize, sizeof( partBounds.size ), &partBounds.size );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXPositionAttribute, 0 ) == kCFCompareEqualTo )
{
// Return the position of this part as an HIPoint.
HIRect partBounds = GetPartBounds( inIdentifier - 1 );
HIPointConvert( &partBounds.origin, kHICoordSpaceView, GetViewRef(), kHICoordSpace72DPIGlobal, NULL );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeHIPoint, sizeof( partBounds.origin ), &partBounds.origin );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXWindowAttribute, 0 ) == kCFCompareEqualTo
|| CFStringCompare( inAttribute, kAXTopLevelUIElementAttribute, 0 ) == kCFCompareEqualTo )
{
// Return the window or top level ui element for this part. They are both the same so re-use the code.
AXUIElementRef windOrTopUI;
windOrTopUI = AXUIElementCreateWithHIObjectAndIdentifier( (HIObjectRef) GetOwner(), 0 );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeCFTypeRef, sizeof( windOrTopUI ), &windOrTopUI );
CFRelease( windOrTopUI );
err = noErr;
}
else if ( CFStringCompare( inAttribute, kAXFocusedAttribute, 0 ) == kCFCompareEqualTo )
{
// Return whether or not this part is focused.
ControlPartCode focusedPart;
Boolean focused;
HIViewGetFocusPart( GetViewRef(), &focusedPart );
focused = ( focusedPart == (ControlPartCode) inIdentifier );
SetEventParameter( inEvent, kEventParamAccessibleAttributeValue, typeBoolean, sizeof( focused ), &focused );
err = noErr;
}
}
return err;
}
// -----------------------------------------------------------------------------
// IsAccessibleNamedAttributeSettable
// -----------------------------------------------------------------------------
// Read about kEventAccessibleIsNamedAttributeSettable in CarbonEvents.h to
// understand what return values mean for this implementation.
//
OSStatus
TImageMapView::IsAccessibleNamedAttributeSettable(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inName,
Boolean* outIsSettable )
{
OSStatus err = eventNotHandledErr;
// The focused attribute is the only settable attribute for this view,
// and it can only be set on part (or subelements), not the whole view.
if ( inIdentifier > 0 && (CFIndex) inIdentifier <= GetPartCount() )
{
if ( CFStringCompare( inName, kAXFocusedAttribute, 0 ) == kCFCompareEqualTo )
{
*outIsSettable = true;
err = noErr;
}
}
return err;
}
// -----------------------------------------------------------------------------
// SetAccessibleNamedAttribute
// -----------------------------------------------------------------------------
// Read about kEventAccessibleSetNamedAttribute in CarbonEvents.h to understand
// what this implementation should do.
//
OSStatus
TImageMapView::SetAccessibleNamedAttribute(
EventHandlerCallRef inCallRef,
EventRef inEvent,
AXUIElementRef inElement,
UInt64 inIdentifier,
CFStringRef inAttribute )
{
OSStatus err = eventNotHandledErr;
if ( inIdentifier > 0 && (CFIndex) inIdentifier <= GetPartCount() )
{
if ( CFStringCompare( inAttribute, kAXFocusedAttribute, 0 ) == kCFCompareEqualTo )