project_files/HedgewarsMobile/MGSplitViewController.h
author koda
Thu, 09 Feb 2012 18:59:46 +0100
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//
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//  MGSplitViewController.h
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//  MGSplitView
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//
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//  Created by Matt Gemmell on 26/07/2010.
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//  Copyright 2010 Instinctive Code.
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//
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#import <UIKit/UIKit.h>
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typedef enum _MGSplitViewDividerStyle {
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	// These names have been chosen to be conceptually similar to those of NSSplitView on Mac OS X.
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	MGSplitViewDividerStyleThin			= 0, // Thin divider, like UISplitViewController (default).
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	MGSplitViewDividerStylePaneSplitter	= 1  // Thick divider, drawn with a grey gradient and a grab-strip.
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} MGSplitViewDividerStyle;
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@class MGSplitDividerView;
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@protocol MGSplitViewControllerDelegate;
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@interface MGSplitViewController : UIViewController <UIPopoverControllerDelegate> {
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	BOOL _showsMasterInPortrait;
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	BOOL _showsMasterInLandscape;
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	float _splitWidth;
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	id _delegate;
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	BOOL _vertical;
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	BOOL _masterBeforeDetail;
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	NSMutableArray *_viewControllers;
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	UIBarButtonItem *_barButtonItem; // To be compliant with wacky UISplitViewController behaviour.
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    UIPopoverController *_hiddenPopoverController; // Popover used to hold the master view if it's not always visible.
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	MGSplitDividerView *_dividerView; // View that draws the divider between the master and detail views.
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	NSArray *_cornerViews; // Views to draw the inner rounded corners between master and detail views.
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	float _splitPosition;
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	BOOL _reconfigurePopup;
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	MGSplitViewDividerStyle _dividerStyle; // Meta-setting which configures several aspects of appearance and behaviour.
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}
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@property (nonatomic, assign) IBOutlet id <MGSplitViewControllerDelegate> delegate;
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@property (nonatomic, assign) BOOL showsMasterInPortrait; // applies to both portrait orientations (default NO)
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@property (nonatomic, assign) BOOL showsMasterInLandscape; // applies to both landscape orientations (default YES)
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@property (nonatomic, assign, getter=isVertical) BOOL vertical; // if NO, split is horizontal, i.e. master above detail (default YES)
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@property (nonatomic, assign, getter=isMasterBeforeDetail) BOOL masterBeforeDetail; // if NO, master view is below/right of detail (default YES)
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@property (nonatomic, assign) float splitPosition; // starting position of split in pixels, relative to top/left (depending on .isVertical setting) if masterBeforeDetail is YES, else relative to bottom/right.
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@property (nonatomic, assign) float splitWidth; // width of split in pixels.
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@property (nonatomic, assign) BOOL allowsDraggingDivider; // whether to let the user drag the divider to alter the split position (default NO).
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@property (nonatomic, copy) NSArray *viewControllers; // array of UIViewControllers; master is at index 0, detail is at index 1.
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@property (nonatomic, retain) IBOutlet UIViewController *masterViewController; // convenience.
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@property (nonatomic, retain) IBOutlet UIViewController *detailViewController; // convenience.
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@property (nonatomic, retain) MGSplitDividerView *dividerView; // the view which draws the divider/split between master and detail.
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@property (nonatomic, assign) MGSplitViewDividerStyle dividerStyle; // style (and behaviour) of the divider between master and detail.
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@property (nonatomic, readonly, getter=isLandscape) BOOL landscape; // returns YES if this view controller is in either of the two Landscape orientations, else NO.
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// Actions
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- (IBAction)toggleSplitOrientation:(id)sender; // toggles split axis between vertical (left/right; default) and horizontal (top/bottom).
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- (IBAction)toggleMasterBeforeDetail:(id)sender; // toggles position of master view relative to detail view.
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- (IBAction)toggleMasterView:(id)sender; // toggles display of the master view in the current orientation.
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- (IBAction)showMasterPopover:(id)sender; // shows the master view in a popover spawned from the provided barButtonItem, if it's currently hidden.
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- (void)notePopoverDismissed; // should rarely be needed, because you should not change the popover's delegate. If you must, then call this when it's dismissed.
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// Conveniences for you, because I care.
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- (BOOL)isShowingMaster;
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- (void)setSplitPosition:(float)posn animated:(BOOL)animate; // Allows for animation of splitPosition changes. The property's regular setter is not animated.
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/* Note:	splitPosition is the width (in a left/right split, or height in a top/bottom split) of the master view.
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			It is relative to the appropriate side of the splitView, which can be any of the four sides depending on the values in isMasterBeforeDetail and isVertical:
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				isVertical = YES, isMasterBeforeDetail = YES: splitPosition is relative to the LEFT edge. (Default)
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				isVertical = YES, isMasterBeforeDetail = NO: splitPosition is relative to the RIGHT edge.
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 				isVertical = NO, isMasterBeforeDetail = YES: splitPosition is relative to the TOP edge.
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 				isVertical = NO, isMasterBeforeDetail = NO: splitPosition is relative to the BOTTOM edge.
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			This implementation was chosen so you don't need to recalculate equivalent splitPositions if the user toggles masterBeforeDetail themselves.
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 */
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- (void)setDividerStyle:(MGSplitViewDividerStyle)newStyle animated:(BOOL)animate; // Allows for animation of dividerStyle changes. The property's regular setter is not animated.
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- (NSArray *)cornerViews;
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/*
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 -cornerViews returns an NSArray of two MGSplitCornersView objects, used to draw the inner corners.
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 The first view is the "leading" corners (top edge of screen for left/right split, left edge of screen for top/bottom split).
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 The second view is the "trailing" corners (bottom edge of screen for left/right split, right edge of screen for top/bottom split).
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 Do NOT modify them, except to:
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	1. Change their .cornerBackgroundColor
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	2. Change their .cornerRadius
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 */
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@end
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@protocol MGSplitViewControllerDelegate
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@optional
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// Called when a button should be added to a toolbar for a hidden view controller.
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- (void)splitViewController:(MGSplitViewController*)svc 
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	 willHideViewController:(UIViewController *)aViewController 
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		  withBarButtonItem:(UIBarButtonItem*)barButtonItem 
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	   forPopoverController: (UIPopoverController*)pc;
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// Called when the master view is shown again in the split view, invalidating the button and popover controller.
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- (void)splitViewController:(MGSplitViewController*)svc 
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	 willShowViewController:(UIViewController *)aViewController 
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  invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem;
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// Called when the master view is shown in a popover, so the delegate can take action like hiding other popovers.
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- (void)splitViewController:(MGSplitViewController*)svc 
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		  popoverController:(UIPopoverController*)pc 
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  willPresentViewController:(UIViewController *)aViewController;
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// Called when the split orientation will change (from vertical to horizontal, or vice versa).
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- (void)splitViewController:(MGSplitViewController*)svc willChangeSplitOrientationToVertical:(BOOL)isVertical;
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// Called when split position will change to the given pixel value (relative to left if split is vertical, or to top if horizontal).
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- (void)splitViewController:(MGSplitViewController*)svc willMoveSplitToPosition:(float)position;
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// Called before split position is changed to the given pixel value (relative to left if split is vertical, or to top if horizontal).
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// Note that viewSize is the current size of the entire split-view; i.e. the area enclosing the master, divider and detail views.
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- (float)splitViewController:(MGSplitViewController *)svc constrainSplitPosition:(float)proposedPosition splitViewSize:(CGSize)viewSize;
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@end