Quartz-2D HIView Scrolling PROBLEM 1

// now find the root HIView window

HRContentRoot = HIViewGetRoot(myWindow);

// find the HIView content window from the nib

OSErr = HIViewFindByID(HRContentRoot,HRContentViewID,&HRContentView);

// get the state we need - MANUAL VERSION

layoutInfo.version = kHILayoutInfoVersionZero;

OSErr = HIViewGetLayoutInfo(HRContentView,&layoutInfo);

OSErr = HIViewGetFrame(HRContentView,&theRect);

// create the scroll view MANUALLY

OSErr = HIScrollViewCreate(kHIScrollViewOptionsVertScroll | kHIScrollViewOptionsHorizScroll,

&HRScrollView);

// put the scrolls in the view's parent

OSErr = HIViewAddSubview(HIViewGetSuperview(HRContentView),HRScrollView);

// set the frame to match what we originally wanted

OSErr = HIViewSetFrame(HRScrollView,&theRect);

// set the layout to what we originally wanted

OSErr = HIViewSetLayoutInfo(HRScrollView,&layoutInfo);

// remove the content view from its current owner and add it into the scroll view

OSErr = HIViewRemoveFromSuperview(HRContentView);

OSErr = HIViewAddSubview(HRScrollView,HRContentView);

// Note - this code DOES correctly set the bounds of the embedded HIView. This can

// be detected by checking the bounds of the event contexts.

theRect.origin.x = 0.0;

theRect.origin.y = 0.0;

theRect.size.width = BITMAPWIDTH+1;

theRect.size.height = BITMAPHEIGHT+1;

OSErr = HIViewSetFrame(HRContentView,&theRect);

// request an update or the screen remains blank

HIViewSetVisible(HRScrollView,true);

HIViewSetNeedsDisplay(HRContentView,true);

// now add an event handler to handle drawing into this window

OSErr = InstallEventHandler(GetControlEventTarget(HRContentView),

NewEventHandlerUPP(myDrawEventHandler),

GetEventTypeCount(HRContentEvents),

HRContentEvents,

(void *)HRContentView,

NULL );

// now add an event handler to handle scrolling

OSErr = InstallEventHandler(GetControlEventTarget(HRScrollView),

NewEventHandlerUPP(myScrollEventHandler),

GetEventTypeCount(HRScrollEvents),

HRScrollEvents,

(void *)HRScrollView,

NULL );

// Now we've changed the size of the content window, we need to send a kEventScrollableInfoChanged event

// to the scroll bars. We'll do that after we've installed the event handler.

HIViewRef parentView = HIViewGetSuperview(HRContentView);

if(parentView)

{

EventRef theEvent;

OSErr = CreateEvent(NULL,kEventClassScrollable,kEventScrollableInfoChanged,GetCurrentEventTime(),

kEventAttributeUserEvent,&theEvent);

OSErr = SendEventToEventTarget(theEvent,GetControlEventTarget(parentView));

ReleaseEvent(theEvent);

}

Many thanks,

Greg