SidebarDemoAppDelegate.m

/*
     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