/*
File: HIEmbedder.cp
Contains: Demonstrates creating a simple embedder using the HIView APIs.
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 © 2003 Apple Computer, Inc., All Rights Reserved
*/
#include <Carbon/Carbon.h>
#include "HIEmbedder.h"
#include "ShadeRect.h"
#define kEmbedderDefaultHeight 1600.0
// structure in which we hold our custom push button's data
typedef struct
{
HIViewRef view; // the HIViewRef for our list
HIPoint originPoint;
}
EmbedderData;
pascal OSStatus ViewHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon);
CFStringRef GetEmbedderClass();
/*
* HICreateEmbedder()
*
* Summary:
* Creates a simple embedder control.
*
* Parameters:
*
* outEmbedder:
* On exit, contains the new control.
*
* Availability:
* Mac OS X: in version 10.2 and later since it needs the HIView APIs
* CarbonLib: not available
* Non-Carbon CFM: not available
*/
extern OSStatus
HICreateEmbedder(HIViewRef * outEmbedder)
{
*outEmbedder = NULL;
HIObjectRef hiObject;
OSStatus status = HIObjectCreate(GetEmbedderClass(), 0, &hiObject);
if (status != noErr) goto exitCreate;
HIViewSetVisible((HIViewRef)hiObject, true);
*outEmbedder = (HIViewRef)hiObject;
exitCreate:
return status;
}
UInt32 GetHIToolboxVersion()
{
CFBundleRef bundle;
CFStringRef versionStr = NULL;
static UInt32 version = 0;
if (version != 0) return version;
bundle = CFBundleGetBundleWithIdentifier( CFSTR("com.apple.HIToolbox") );
if ( bundle != NULL )
versionStr = (CFStringRef) CFBundleGetValueForInfoDictionaryKey( bundle, CFSTR("CFBundleShortVersionString") );
if ( versionStr != NULL && CFGetTypeID( versionStr ) == CFStringGetTypeID() )
{
int major = 0, minor = 0, bugfix = 0;
char sz[20];
CFStringGetCString( versionStr, sz, sizeof( sz ), kCFStringEncodingUTF8 );
sscanf( sz, "%d.%d.%d", &major, &minor, &bugfix );
version = ( major << 8 ) + ( minor << 4 ) + bugfix;
}
return version;
}
OSStatus EmbedderViewDrawing(CGContextRef context, const HIRect * bounds, const EmbedderData * myData)
{
HIRect FullBounds = { {0.0, 0.0}, {1000.0, kEmbedderDefaultHeight}};
// Alpha shading working only in Panther
CGRGB inStartColor = {1.0, 0.0, 0.0, 0.8}, inEndColor = {0.0, 0.0, 1.0, 0.8};
ShadeRectColor(&inStartColor, &inEndColor, &FullBounds, context);
return noErr;
}
/*----------------------------------------------------------------------------------------------------------*/
// * GetEmbedderClass
// Registers and returns an HIObject class for a simple embedder control.
/*----------------------------------------------------------------------------------------------------------*/
CFStringRef GetEmbedderClass()
{
// following code is pretty much boiler plate.
static HIObjectClassRef theClass;
if (theClass == NULL)
{
static EventTypeSpec kFactoryEvents[] =
{
// the next 3 messages are boiler plate
{ kEventClassHIObject, kEventHIObjectConstruct },
{ kEventClassHIObject, kEventHIObjectInitialize },
{ kEventClassHIObject, kEventHIObjectDestruct },
// the next 2 messages are Scroll specific
{ kEventClassScrollable, kEventScrollableGetInfo },
{ kEventClassScrollable, kEventScrollableScrollTo },
// the next message is Control specific
{ kEventClassControl, kEventControlInitialize },
{ kEventClassControl, kEventControlDraw }
};
HIObjectRegisterSubclass(kEmbedderClassID, kHIViewClassID, 0, ViewHandler,
GetEventTypeCount(kFactoryEvents), kFactoryEvents, 0, &theClass);
}
return kEmbedderClassID;
}
/*----------------------------------------------------------------------------------------------------------*/
// * ViewHandler
// Event handler that implements our simple embedder control.
/*----------------------------------------------------------------------------------------------------------*/
pascal OSStatus ViewHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)
{
OSStatus result = eventNotHandledErr;
EmbedderData* myData = (EmbedderData*)inRefcon;
switch (GetEventClass(inEvent))
{
case kEventClassHIObject:
switch (GetEventKind(inEvent))
{
case kEventHIObjectConstruct:
{
// allocate some instance data
myData = (EmbedderData*) calloc(1, sizeof(EmbedderData));
// get our superclass instance
HIViewRef epView;
GetEventParameter(inEvent, kEventParamHIObjectInstance, typeHIObjectRef, NULL, sizeof(epView), NULL, &epView);
// remember our superclass in our instance data and initialize other fields
myData->view = epView;
// set the control ID so that we can find it later with HIViewFindByID
result = SetControlID(myData->view, &kEmbedderViewID);
if (result != noErr) DebugStr("\pSetControlID failed!");
// store our instance data into the event
result = SetEventParameter(inEvent, kEventParamHIObjectInstance, typeVoidPtr, sizeof(myData), &myData);
break;
}
case kEventHIObjectDestruct:
{
free(myData);
result = noErr;
break;
}
case kEventHIObjectInitialize:
{
// always begin kEventHIObjectInitialize by calling through to the previous handler
result = CallNextEventHandler(inCaller, inEvent);
// if that succeeded, do our own initialization
if (result == noErr)
{
Rect itemRect = {20, 20, 40, 220 };
ControlRef outControl;
result = CreatePushButtonControl(NULL, &itemRect, CFSTR("First Button"), &outControl);
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, 40, 200);
result = CreatePushButtonControl(NULL, &itemRect, CFSTR("Second Button"), &outControl);
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, 40, 200);
result = CreateSliderControl(NULL, &itemRect, 50, 0, 300, kControlSliderPointsDownOrRight, 0, true, NULL, &outControl);
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, -40, 200);
result = CreateProgressBarControl(NULL, &itemRect, 0, 0, 100, true, &outControl);
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, -40, 200); itemRect.right += 100; itemRect.bottom -= 5;
result = CreateEditUnicodeTextControl(NULL, &itemRect, CFSTR("This is an Unicode Edit Text control"), false, NULL, &outControl);
itemRect.right -= 100;
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, 40, 200);
result = CreateScrollBarControl(NULL, &itemRect, 50, 0, 300, 0, true, NULL, &outControl);
itemRect.bottom += 5;
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, 40, 200);
result = CreateCheckBoxControl(NULL, &itemRect, CFSTR("Check Box"), 0, true, &outControl);
HIViewAddSubview(myData->view, outControl);
OffsetRect(&itemRect, -80, 200); itemRect.right += 100;
result = CreatePopupButtonControl(NULL, &itemRect, CFSTR("Popup Button"), 129, false, 120, teJustRight, normal, &outControl);
HIViewAddSubview(myData->view, outControl);
}
break;
}
default:
break;
}
break;
case kEventClassScrollable:
switch (GetEventKind(inEvent))
{
case kEventScrollableGetInfo:
{
// we're being asked to return information about the scrolled view that we set as Event Parameters
HISize imageSize = {50.0, kEmbedderDefaultHeight};
SetEventParameter(inEvent, kEventParamImageSize, typeHISize, sizeof(imageSize), &imageSize);
HISize lineSize = {50.0, 20.0};
SetEventParameter(inEvent, kEventParamLineSize, typeHISize, sizeof(lineSize), &lineSize);
HIRect bounds;
HIViewGetBounds(myData->view, &bounds);
SetEventParameter(inEvent, kEventParamViewSize, typeHISize, sizeof(bounds.size), &bounds.size);
SetEventParameter(inEvent, kEventParamOrigin, typeHIPoint, sizeof(myData->originPoint), &myData->originPoint);
result = noErr;
break;
}
case kEventScrollableScrollTo:
{
// we're being asked to scroll, we just do a sanity check and ask for a redraw
HIPoint where;
GetEventParameter(inEvent, kEventParamOrigin, typeHIPoint, NULL, sizeof(where), NULL, &where);
HIViewSetNeedsDisplay(myData->view, true);
myData->originPoint.y = (where.y < 0.0)?0.0:where.y;
HIViewSetBoundsOrigin(myData->view, 0, myData->originPoint.y);
// the "revealed" children won't be visible unless we hide/show the embedder itself
// this is a Jaguar bug (#3126953) fixed in Panther
if (GetHIToolboxVersion() < 0x130)
{
HIViewSetVisible(myData->view, false);
HIViewSetVisible(myData->view, true);
}
// some of the embedded controls (UnicodeText & ScrollBar) don't update correctly when scrolled
// this is a Panther bug not fixed yet so unfortunately we have to maintained the following Hide/Show workaround
if (GetHIToolboxVersion() >= 0x130)
{
UInt16 i, numChildren;
CountSubControls(myData->view, &numChildren);
for (i=0; i<numChildren; i++)
{
ControlRef subControl;
GetIndexedSubControl(myData->view, i, &subControl);
ControlKind controlKind;
GetControlKind(subControl, &controlKind);
if ( (controlKind.kind == kControlKindScrollBar) || (controlKind.kind == kControlKindEditUnicodeText) )
{
HIViewSetVisible(subControl, false);
HIViewSetVisible(subControl, true);
}
}
}
break;
}
default:
break;
}
break;
case kEventClassControl:
switch (GetEventKind(inEvent))
{
// sets the feature of the view.
case kEventControlInitialize:
{
result = CallNextEventHandler(inCaller, inEvent);
if (result != noErr) break;
UInt32 features = 0;
result = GetEventParameter(inEvent, kEventParamControlFeatures, typeUInt32, NULL, sizeof(features), NULL, &features);
if (result == noErr)
features |= kControlSupportsEmbedding;
else
features = kControlSupportsEmbedding;
result = SetEventParameter(inEvent, kEventParamControlFeatures, typeUInt32, sizeof features, &features);
break;
}
// Draw the view.
case kEventControlDraw:
{
CGContextRef context;
result = GetEventParameter(inEvent, kEventParamCGContextRef, typeCGContextRef, NULL, sizeof(context), NULL, &context);
if (result != noErr) {DebugStr("\pGetEventParameter failed for kEventControlDraw"); break;}
HIRect bounds;
HIViewGetBounds(myData->view, &bounds);
CGContextSaveGState(context);
CGAffineTransform transform = CGAffineTransformIdentity;
// adjust the transform so the text doesn't draw upside down
transform = CGAffineTransformScale(transform, 1, -1);
CGContextSetTextMatrix(context, transform);
// now that the proper parameters and configurations have been dealt with, let's draw
EmbedderViewDrawing(context, &bounds, myData);
CGContextRestoreGState(context);
result = noErr;
break;
}
default:
break;
}
break;
default:
break;
}
return result;
}
|
