/*

     File: SidebarDemoAppDelegate.m 

 Abstract: 

 Basic app delegate/controller for a View Based TableView that implements a standard source list sidebar.

  Version: 1.1 

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*/

#import "SidebarDemoAppDelegate.h"

#import "SidebarTableCellView.h"

@implementation SidebarDemoAppDelegate

@synthesize window = _window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

    // The array determines our order

    _topLevelItems = [[NSArray arrayWithObjects:@"Favorites", @"Content Views", @"Mailboxes", @"A Fourth Group", nil] retain];

    // The data is stored ina  dictionary. The objects are the nib names to load.

    _childrenDictionary = [NSMutableDictionary new];

    [_childrenDictionary setObject:[NSArray arrayWithObjects:@"ContentView1", @"ContentView2", @"ContentView3", nil] forKey:@"Favorites"];

    [_childrenDictionary setObject:[NSArray arrayWithObjects:@"ContentView1", @"ContentView2", @"ContentView3", nil] forKey:@"Content Views"];

    [_childrenDictionary setObject:[NSArray arrayWithObjects:@"ContentView2", nil] forKey:@"Mailboxes"];

    [_childrenDictionary setObject:[NSArray arrayWithObjects:@"ContentView1", @"ContentView1", @"ContentView1", @"ContentView1", @"ContentView2", nil] forKey:@"A Fourth Group"];

    // The basic recipe for a sidebar. Note that the selectionHighlightStyle is set to NSTableViewSelectionHighlightStyleSourceList in the nib

    [_sidebarOutlineView sizeLastColumnToFit];

    [_sidebarOutlineView reloadData];

    [_sidebarOutlineView setFloatsGroupRows:NO];

    // NSTableViewRowSizeStyleDefault should be used, unless the user has picked an explicit size. In that case, it should be stored out and re-used.

    [_sidebarOutlineView setRowSizeStyle:NSTableViewRowSizeStyleDefault];

    // Expand all the root items; disable the expansion animation that normally happens

    [NSAnimationContext beginGrouping];

    [[NSAnimationContext currentContext] setDuration:0];

        [_sidebarOutlineView expandItem:nil expandChildren:YES];

    [NSAnimationContext endGrouping];

}

- (void)dealloc {

    [_currentContentViewController release];

    [_topLevelItems release];

    [_childrenDictionary release];

    [super dealloc];

}

- (void)_setContentViewToName:(NSString *)name {

    if (_currentContentViewController) {

        [[_currentContentViewController view] removeFromSuperview];

        [_currentContentViewController release];

    }

    _currentContentViewController = [[NSViewController alloc] initWithNibName:name bundle:nil]; // Retained

    NSView *view = [_currentContentViewController view];

    view.frame = _mainContentView.bounds;

    [view setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];

    [_mainContentView addSubview:view];

}

- (void)outlineViewSelectionDidChange:(NSNotification *)notification {

    if ([_sidebarOutlineView selectedRow] != -1) {

        NSString *item = [_sidebarOutlineView itemAtRow:[_sidebarOutlineView selectedRow]];

        if ([_sidebarOutlineView parentForItem:item] != nil) {

            // Only change things for non-root items (root items can be selected, but are ignored)

            [self _setContentViewToName:item];

        }        

    }

}

- (NSArray *)_childrenForItem:(id)item {

    NSArray *children;

    if (item == nil) {

        children = _topLevelItems;

    } else {

        children = [_childrenDictionary objectForKey:item];

    }

    return children;    

}

- (id)outlineView:(NSOutlineView *)outlineView child:(NSInteger)index ofItem:(id)item {

    return [[self _childrenForItem:item] objectAtIndex:index];

}

- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {

    if ([outlineView parentForItem:item] == nil) {

        return YES;

    } else {

        return NO;

    }    

}

- (NSInteger) outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {

    return [[self _childrenForItem:item] count];

}

- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item {

    return [_topLevelItems containsObject:item];

}

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldShowOutlineCellForItem:(id)item {

    // As an example, hide the "outline disclosure button" for FAVORITES. This hides the "Show/Hide" button and disables the tracking area for that row.

    if ([item isEqualToString:@"Favorites"]) {

        return NO;

    } else {

        return YES;

    }

}

- (NSView *)outlineView:(NSOutlineView *)outlineView viewForTableColumn:(NSTableColumn *)tableColumn item:(id)item {

    // For the groups, we just return a regular text view. 

    if ([_topLevelItems containsObject:item]) {

        NSTextField *result = [outlineView makeViewWithIdentifier:@"HeaderTextField" owner:self];

        // Uppercase the string value, but don't set anything else. NSOutlineView automatically applies attributes as necessary

        NSString *value = [item uppercaseString];

        [result setStringValue:value];

        return result;

    } else  {

        // The cell is setup in IB. The textField and imageView outlets are properly setup.

        // Special attributes are automatically applied by NSTableView/NSOutlineView for the source list

        SidebarTableCellView *result = [outlineView makeViewWithIdentifier:@"MainCell" owner:self];

        result.textField.stringValue = item;

        // Setup the icon based on our section

        id parent = [outlineView parentForItem:item];

        NSInteger index = [_topLevelItems indexOfObject:parent];

        NSInteger iconOffset = index % 4;

        switch (iconOffset) {

            case 0: {

                result.imageView.image = [NSImage imageNamed:NSImageNameIconViewTemplate];

                break;

            }

            case 1: {

                result.imageView.image = [NSImage imageNamed:NSImageNameHomeTemplate];

                break;

            }

            case 2: {

                result.imageView.image = [NSImage imageNamed:NSImageNameQuickLookTemplate];

                break;

            }

            case 3: {

                result.imageView.image = [NSImage imageNamed:NSImageNameSlideshowTemplate];

                break;

            }

        }

        BOOL hideUnreadIndicator = YES;

        // Setup the unread indicator to show in some cases. Layout is done in SidebarTableCellView's viewWillDraw

        if (index == 0) {

            // First row in the index

            hideUnreadIndicator = NO;

            [result.button setTitle:@"42"];

            [result.button sizeToFit];

            // Make it appear as a normal label and not a button

            [[result.button cell] setHighlightsBy:0];

        } else if (index == 2) {

            // Example for a button

            hideUnreadIndicator = NO;

            result.button.target = self;

            result.button.action = @selector(buttonClicked:);

            [result.button setImage:[NSImage imageNamed:NSImageNameAddTemplate]];

            // Make it appear as a button

           [[result.button cell] setHighlightsBy:NSPushInCellMask|NSChangeBackgroundCellMask];

        }

        [result.button setHidden:hideUnreadIndicator];

        return result;

    }

}

- (void)buttonClicked:(id)sender {

    // Example target action for the button

    NSInteger row = [_sidebarOutlineView rowForView:sender];

    NSLog(@"row: %ld", row);

}

- (IBAction)sidebarMenuDidChange:(id)sender {

    // Allow the user to pick a sidebar style

    NSInteger rowSizeStyle = [sender tag];

    [_sidebarOutlineView setRowSizeStyle:rowSizeStyle];

}

- (void)menuNeedsUpdate:(NSMenu *)menu {

    for (NSInteger i = 0; i < [menu numberOfItems]; i++) {

        NSMenuItem *item = [menu itemAtIndex:i];

        if (![item isSeparatorItem]) {

            // In IB, the tag was set to the appropriate rowSizeStyle. Read in that value.

            NSInteger state = ([item tag] == [_sidebarOutlineView rowSizeStyle]) ? 1 : 0;

            [item setState:state];

        }

    }

}

- (BOOL)splitView:(NSSplitView *)splitView canCollapseSubview:(NSView *)subview {

    return NO;

}

- (CGFloat)splitView:(NSSplitView *)splitView constrainMinCoordinate:(CGFloat)proposedMinimumPosition ofSubviewAt:(NSInteger)dividerIndex {

    if (proposedMinimumPosition < 75) {

        proposedMinimumPosition = 75;

    }

    return proposedMinimumPosition;

}

@end