Calendar Month Grid: Custom image support#172

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robelkin wants to merge 12 commits intodevinross:masterfrom robelkin:custom-images

+238-42

Commits on Jul 11, 2012

made the monthYear ivar available as a property to make customisation of it possible without subclassing
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added delegate method definitions to get images and image views to customise images for the control
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defined new tiles delegate and had the month view adopt it
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defined the delegate property on the month tiles object, and the optional methods that make up the delegate
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moved the setup of the selected image view to the draw rect, so that the call to self.currentDay would be able to use the delegate
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use the delegate to get the tile
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replace all calls to hard coded image paths with calls to the delegate, which in this case will be the owning month view
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implement the TKCalendarMonthTilesDelegate methods to check if the month view delegate is providing images, or if not we should just provide them ourselves.
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make sure that the tiles always have the delegate set to the month view
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moved all the generation of the views/subview adding to the drawrect, so it only happens when it has to, and so we have a chance to set the delegate method to override images
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check if the delegate exists and if we are getting an image back from it, if we are then use it for our images, fall back to the bundle images
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provided examples of the new delegate methods in the demo
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