I wish I would find an answer for this. I have searched and searched and couldn't the right answer. Here is my situation:
In a Mac OS Cocoa Application, I want to draw a pixel (actually a few pixels) onto a dedicated area on my application window. I figured, it would be nicer to have a NSImageView placed there (I did so with IB and connected the outlet to my app delegate) and draw on that instead of my NSWindow.
How in the world can I do that? Mac OS seems to offer NSBezierPath as the most basic drawing tool — is that true? This is completely shocking to me. I come from a long history of Windows programming and drawing a pixel onto a canvas is the most simple thing, typically.
I do not want to use OpenGL and I am not sure to what extent Quartz is involved in this.
All I want is some help on how I can pull off this pseudocode in real Objective-C/Cocoa:
imageObj.drawPixel(10,10,blackColor);
I would love to hear your answers on this and I am sure this will help a lot of people starting with Cocoa.
Thanks!
NSBezierPath is the only tool available in Cocoa for drawing most primitive shapes, and for many complex shapes. Detail description you can find here: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CocoaDrawingGuide/Paths/Paths.html%23//apple_ref/doc/uid/TP40003290-CH206-BBCHFJJG http://en.wikibooks.org/wiki/Programming_Mac_OS_X_with_Cocoa_for_Beginners/Graphics_-_Drawing_with_Quartz