Instance Method

lockFocusIfCanDrawInContext:

Locks the focus to the view atomically if drawing can occur in the specified graphics context.

Declaration

- (BOOL)lockFocusIfCanDrawInContext:(NSGraphicsContext *)context;

Parameters

context: The graphics context in which drawing might occur. See the discussion for the implications of the type of context.

Return Value

YES if successful; otherwise, returns NO.

See Also

Focusing

Locks the focus on the view, so subsequent commands take effect in the view’s window and coordinate system.

Deprecated

- lockFocusIfCanDraw

Locks the focus to the view atomically if the canDraw method returns YES and returns the value of canDraw.

Deprecated

- unlockFocus

Unlocks focus from the current view.

Deprecated

Returns the currently focused NSView object, or nil if there is none.