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Re: PlotIconRefInContext doesn't work

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Re: PlotIconRefInContext doesn't work

Subject: Re: PlotIconRefInContext doesn't work
From: Mike <email@hidden>
Date: Sat, 17 May 2008 13:16:56 -0700

Michael Babin wrote:

On May 17, 2008, at 10:06 AM, Michael Vannorsdel wrote:
I'm thinking the window might be redrawing itself right after your own drawing and erasing it. You could try disabling the window's auto displaying and flush the window buffer after your draw to determine if this is the case.

I don't know where you're doing the drawing to know if it's safe from being erased or not.
On May 17, 2008, at 12:37 AM, Mike wrote:
It's a local NSRect which I assume is interchangeable with CGRect as they are the same.

I fill in the rect at the top of the method with the Rect of the item in the window from IB and then I hide the item before drawing to prevent my stuff from being drawn over.

CGContextFillRect doesn't do anything either. Just a blank space as with PlotIconRefInContext.
If that were indeed the problem (some other drawing taking place after his own and erasing it), an easier way to check for it would be to use Quartz Debug, turn on "Autoflush drawing", set a breakpoint at the CGContextFillRect call, and step over it to see if the rect is indeed filled as expected.

I tried adding a -display message at the end of the method which forces a flush, but nothing changed. This is for an about box window. One question I have is: do I need to subclass NSWindow and then override the drawing and updating methods in order to get this to work? I will give Quartz Debug a try. Here is the entire method:

/////////////////////////////////////////////////////////////////////
// Display the About box and fill it with version and system info.
/////////////////////////////////////////////////////////////////////

- (IBAction)about:(id)sender
{
unsigned		len = 0;
NSRect			iconRectNS = { 0, 0, 0, 0 };

CGContextRef		windowContext = NULL;
RGBColor		inLabelColor = { 1, 1, 1 };

IconRef icon = NULL; NSGraphicsContext *a = nil; NSString *aboutNameString = nil; NSString *bundleGetInfoString = nil; NSString *aboutFinalString = nil; NSString *tempHardwareInfoString = nil; NSFont *newFont = nil; NSRange theActualTextUpperStorageRange; NSTextStorage *theActualTextUpperStorage = nil; NSMutableAttributedString *theActualTextUpperStorageAsString = nil; NSRange theActualTextLowerStorageRange; NSTextStorage *theActualTextLowerStorage = nil; NSMutableAttributedString *theActualTextLowerStorageAsString = nil; OSStatus err = noErr; if( aboutWindow && mainWindow && model && helpMenu && aboutWindowLowerTextView && aboutWindowUpperTextView ) { // Center the about window... [ aboutWindow center ]; [ aboutWindow useOptimizedDrawing:YES ]; // Make font newFont = [ NSFont fontWithName:kHelveticaFontName size:kAboutBoxFontSize ]; //////////////////////////////////////////////////// // Make usable text for the about box upper pane... //////////////////////////////////////////////////// // Get about name string... aboutNameString = [ [ NSBundle mainBundle ] localizedStringForKey:kWSAppAboutNameStringKey value:nil table:nil ]; // Append CFBundleGetInfoString string... bundleGetInfoString = [ [ NSBundle mainBundle ] objectForInfoDictionaryKey:(NSString*)kCFBundleGetInfoCFStringKey ]; // Make final string for upper pane... aboutFinalString = [ aboutNameString stringByAppendingString:bundleGetInfoString ]; if( aboutFinalString ) { //////////////////////////////////////////////// // Set the text in the about box upper pane... //////////////////////////////////////////////// // Get refs to text view's NSTextStorage's... theActualTextUpperStorage = [ aboutWindowUpperTextView textStorage ]; if( theActualTextUpperStorage ) { // Get text storage's text... theActualTextUpperStorageAsString = (NSMutableAttributedString*)[ theActualTextUpperStorage mutableString ]; if( theActualTextUpperStorageAsString ) { // Make range for old text... memset( &theActualTextUpperStorageRange, kMemsetBufferFillValue, sizeof( theActualTextUpperStorageRange ) );

len = [ theActualTextUpperStorageAsString length ]; theActualTextUpperStorageRange = NSMakeRange( 0, len ); // Replace upper text! [ theActualTextUpperStorage replaceCharactersInRange:theActualTextUpperStorageRange withString:aboutFinalString ]; } // Set font... [ theActualTextUpperStorage setFont:newFont ]; } // Force data model to reload hardware info... [ model loadHardwareInfo ]; ///////////////////////////////////////////// // Make usable text for the bottom pane... ///////////////////////////////////////////// theActualTextLowerStorage = [ aboutWindowLowerTextView textStorage ]; if( theActualTextLowerStorage ) { // Get text storage's text... theActualTextLowerStorageAsString = (NSMutableAttributedString*)[ theActualTextLowerStorage mutableString ]; if( theActualTextLowerStorageAsString ) { // Make range for old text... memset( &theActualTextLowerStorageRange, kMemsetBufferFillValue, sizeof( theActualTextLowerStorageRange ) );

len = [ theActualTextLowerStorageAsString length ]; theActualTextLowerStorageRange = NSMakeRange( 0, len ); // Replace lower text! tempHardwareInfoString = [ model hardwareInfoString ]; [ theActualTextLowerStorage replaceCharactersInRange:theActualTextLowerStorageRange withString:tempHardwareInfoString ]; } // Set font... [ theActualTextLowerStorage setFont:newFont ]; }

// Order main window to back... [ mainWindow orderBack:self ]; // Make sure the about window's level is in front of the shielding window level... [ aboutWindow setLevel:( CGShieldingWindowLevel() + 1 ) ]; // Make about window frontmost... [ aboutWindow makeKeyAndOrderFront:self ]; // Plot the machine icon, if available... if( model && aboutWindowMachineIcon ) { // Copy the rect to a new NSRect to modify... iconRectNS = [ aboutWindowMachineIcon frame ]; [ aboutWindowMachineIcon setHidden:YES ]; [ aboutWindowMachineIcon setNeedsDisplay:NO ];

// Set context...

a = [ NSGraphicsContext graphicsContextWithWindow:aboutWindow ];
if( a )
{
	[ NSGraphicsContext setCurrentContext:a ];

	// Get window's context...

	windowContext = [ [ NSGraphicsContext currentContext ] graphicsPort ];
	if( windowContext )
	{
		// Plot!

		GetIconRef( kOnSystemDisk, kSystemIconsCreator, kFinderIcon, &icon );

		err = PlotIconRefInContext(	windowContext,
													(CGRect*)&iconRectNS,
													kAlignAbsoluteCenter,
													kTransformNone,
													&inLabelColor,
													kPlotIconRefNormalFlags,
													icon	);
	}
}
}

// Last, force the selected menu item on the About menu to be "Help"...

[ helpMenu selectItemAtIndex:0 ];

[ helpMenu setNeedsDisplay:YES ];

// Force update in about window...

[ aboutWindow display ];
		}
	}
}
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Re: [SOLVED] PlotIconRefInContext doesn't work
From: Mike <email@hidden>


References:  
  >Re: PlotIconRefInContext doesn't work (From: Michael Vannorsdel <email@hidden>)
  >Re: PlotIconRefInContext doesn't work (From: Michael Babin <email@hidden>)




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