XOR drawing function or some sort of alternative.
I'm working on a program in Cocoa that reads data from a server for a experiment at the University and displays it in graphs, but I'm having trouble with one function. I need a crosshair sort of thing so that you can pinpoint data on the graph with your mouse, but all it is currently is a NSBezier that draws lines to the mouse on the X and Y axes and refreshes the whole view.
This is obviously a terrible performer so I was looking for an alternative. I was thinking of using an XOR function to flip the bits where the crosshairs are, but it is apparent from the documentation for Quartz that XOR is no longer supported. Does anyone here know of a way to use XOR or is there a better alternative? All I really need to do is draw a cursor without redrawing the whole display.
This is obviously a terrible performer so I was looking for an alternative. I was thinking of using an XOR function to flip the bits where the crosshairs are, but it is apparent from the documentation for Quartz that XOR is no longer supported. Does anyone here know of a way to use XOR or is there a better alternative? All I really need to do is draw a cursor without redrawing the whole display.
PowerMac G5, Mac OS X (10.4.10), 2 Gigs of RAM, 22 In. Screen
