/*

     File: MainWindowController.m 

 Abstract: Class for the sample's main window controller. 

  Version: 1.1 

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 */

#import "MainWindowController.h"

@implementation MainWindowController

-(id)init {

    self = [super initWithWindowNibName:@"MainWindow"];

    return self;

}

// NOTE: One key to having the contained view resize correctly is to have its autoresizing set correctly in IB.

//Based on the new content view frame, calculate the window's new frame

-(NSRect)newFrameForNewContentView:(NSView *)view {

    NSWindow *window = [self window];

    NSRect newFrameRect = [window frameRectForContentRect:[view frame]];

    NSRect oldFrameRect = [window frame];

    NSSize newSize = newFrameRect.size;

    NSSize oldSize = oldFrameRect.size;

    NSRect frame = [window frame];

    frame.size = newSize;

    frame.origin.y -= (newSize.height - oldSize.height);

    return frame;

}

-(NSView *)viewForTag:(int)tag {

    NSView *view = nil;

    switch(tag) {

    case 0: view = smallView; break;

    case 1: view = mediumView; break;

    case 2: default: view = largeView; break;

    }

    return view;

}

-(BOOL)validateToolbarItem:(NSToolbarItem *)item {

    if ([item tag] == currentViewTag) return NO;

    else return YES;

}

// We need to be layer-backed to have subview transitions.

-(void)awakeFromNib {

    [[self window] setContentSize:[smallView frame].size];

    [[[self window] contentView] addSubview:smallView];

    [[[self window] contentView] setWantsLayer:YES];

}

-(IBAction)switchView:(id)sender {

    // Figure out the new view, the old view, and the new size of the window

    int tag = [sender tag];

    NSView *view = [self viewForTag:tag];

    NSView *previousView = [self viewForTag: currentViewTag];

    currentViewTag = tag;

    NSRect newFrame = [self newFrameForNewContentView:view];

    // Using an animation grouping because we may be changing the duration

    [NSAnimationContext beginGrouping];

    // With the shift key down, do slow-mo animation

    if ([[NSApp currentEvent] modifierFlags] & NSShiftKeyMask)

        [[NSAnimationContext currentContext] setDuration:1.0];

    // Call the animator instead of the view / window directly

    [[[[self window] contentView] animator] replaceSubview:previousView with:view];

    [[[self window] animator] setFrame:newFrame display:YES];

    [NSAnimationContext endGrouping];

}

// In this case, just moving an image view back and forth.

// Note the use of the animator.

-(IBAction)moveView:(id)sender {

    NSPoint newPoint = didMoveView ? NSMakePoint(17.0, 87.0) : NSMakePoint(339.0, 87.0);

    [[imageView animator] setFrameOrigin: newPoint];

    didMoveView = !didMoveView;

}

// Moving all subviews except the button that triggers the action.

// Note the use of the animator, and that there is an implied transaction

// All of the animations start simultaneously.

-(IBAction)moveAllViews:(id)sender {

    float deltaY = didMoveAllViews ? 222.0 : -222.0;

    for (NSView *subview in [mediumView subviews]) {

    if ([subview tag] != -12) {

        NSRect frame = [subview frame];

        frame.origin.y += deltaY;

        [[subview animator] setFrame: frame];

    }

    }

    didMoveAllViews = !didMoveAllViews;

}

@end