Xcode 4.6.3, OS X Lion 10.7.5, my Document app for OS X
Here are quotes from the View Programming Guide 2013-08-08
"By default, the graphics environment origin (0.0,0.0) is located in the lower
left,…." page 11
"The frame rectangle defines the view's location and size in the superview
using the superview’s coordinate system.
The bounds rectangle defines the interior coordinate system that is used when
drawing the contents of the view, including the origin and scaling." page 12
"The content view acts as the root of the visible view hierarchy in a window."
Page 17
I understand the above.
My code: (N.B. I need to create the Matrix programatically because of the
prototype Cell).
- (void)windowControllerDidLoadNib:(NSWindowController *)aController {
[super windowControllerDidLoadNib:aController];
// Add any code here that needs to be executed once the windowController
has loaded the document's window.
// Get the initial content view size so as to
// (a)compute where to place the matrix and
// (b)what size to make the matrix cells
// Local vars for this method
NSWindow *theWindow = [aController window];
NSView *theContentView = theWindow.contentView;
NSRect theContentFrame = theContentView.frame;
NSRect theMatrixFrame = NSInsetRect(theContentFrame, 40.0, 40.);
Cell *protoCell = Cell new];
// Instance vars
_theMatrix = [[Matrix alloc]initWithFrame:theMatrixFrame
mode:NSListModeMatrix prototype:protoCell
numberOfRows:3 numberOfColumns:3];
[theContentView addSubview:_theMatrix];
}
My questions:
(0) Given the above documentation why is the matrix drawn at top left (indented
of course)?
The default location is stated to be lower left.
(1) Is the contentView's superView the screen?
And thus the contentView uses the screen's origin co-ordinates which are top
left?
TIA
Peter
PS: If my memory is correct, from the beginning of Mac OS up till OS X the
origin was top left.
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