/*

     File: Controller.m 

 Abstract: The primary window controller of this application. 

  Version: 1.1 

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 redistribute this Apple software. 

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 license, under Apple's copyrights in this original Apple software (the 

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 be used to endorse or promote products derived from the Apple Software 

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 expressly stated in this notice, no other rights or licenses, express or 

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION 

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 */

#import "Controller.h"

#import "ControllerBrowsing.h"

@implementation Controller

- (void)updateScreenOptions:(NSScreen *)screen

{

    if (screen != nil)

    {

        NSDictionary *screenOptions =

            [[NSWorkspace sharedWorkspace] desktopImageOptionsForScreen:curScreen];

        // the value is an NSNumber containing an NSImageScaling (scaling factor)

        NSNumber *scalingFactor = [screenOptions objectForKey:NSWorkspaceDesktopImageScalingKey];

        // select the proper menu item that matches it's representedObject value

        for (NSMenuItem *item in [scalingPopup itemArray])

        {

            if ([[item representedObject] integerValue] == [scalingFactor integerValue])

            {

                [scalingPopup selectItem:item];

                break;

            }

        }

        // the value is an NSNumber containing a BOOL (allow clipping)

        NSNumber *allowClipping = [screenOptions objectForKey:NSWorkspaceDesktopImageAllowClippingKey];

        [[clippingCheckbox cell] setState:[allowClipping boolValue]];

        // the value is an NSColor (fill color)

        NSColor *fillColorValue = [screenOptions objectForKey:NSWorkspaceDesktopImageFillColorKey];

        if (fillColorValue)

            [fillColor setColor:fillColorValue];

    }

}

- (void)awakeFromNib

{

    [self setupBrowsing];   // setup our image browser and initially point it to: /Library/Desktop Pictures/

    // build the screens popup menu

    NSMenu *screensMenu = [[NSMenu alloc] initWithTitle:@"screens"];

    NSArray *screens = [NSScreen screens];

    // apply represented object values to each menu item the scaling popup button

    //

    // here are the values used in the popupButton's menu items:

    //

    // NSImageScaleAxesIndependently -

    //      scale each dimension to exactly fit destination. Do not preserve aspect ratio.

    // NSImageScaleNone -

    //      Do not scale

    // NSImageScaleProportionallyUpOrDown -

    //      scale image to maximum possible dimensions while (1) staying within destination

    //      area (2) preserving aspect ratio

    //

    NSInteger value = NSImageScaleAxesIndependently;

    NSArray *menuItems = [scalingPopup itemArray];

    for (NSMenuItem *item in menuItems)

    {

        [item setRepresentedObject:[NSNumber numberWithInteger:value++]];

    }

    NSScreen *iterScreen;

    NSUInteger screenIndex = 1;

    for (iterScreen in screens)

    {

        NSMenuItem *item;

        NSString *menuTitle;

        if (iterScreen == [NSScreen mainScreen])

        {

            menuTitle = @"Main Screen";

        }

        else

        {

            menuTitle = [NSString stringWithFormat:@"Screen %ld", (long)screenIndex];

        }

        item = [[NSMenuItem alloc] initWithTitle:menuTitle

                                          action:@selector(screensMenuAction:)

                                   keyEquivalent:@""];

        [item setRepresentedObject:iterScreen];

        [screensMenu addItem:item];

        if (iterScreen == [NSScreen mainScreen])

        {

            // select and remember the main screen at startup

            [screenPopup selectItem:item];

            curScreen = iterScreen;

        }

        [item release];

        screenIndex++;

    }

    [screenPopup setMenu:screensMenu];

    [screensMenu release];

    [self updateScreenOptions:curScreen];

}

- (void)dealloc

{

    [images release];

    [super dealloc];

}

- (IBAction)screensMenuAction:(id)sender

{

    NSMenuItem *chosenItem = (NSMenuItem *)sender;

    NSScreen *screen = [chosenItem representedObject];

    curScreen = screen; // keep track of the current screen selection

    [self updateScreenOptions:screen];

}

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication

{

    // app will quit if our primary window is closed

    return YES;

}

#pragma mark - Actions

- (IBAction)scalingAction:(id)sender

{

    // get the current screen options

    NSMutableDictionary *screenOptions =

        [[[NSWorkspace sharedWorkspace] desktopImageOptionsForScreen:curScreen] mutableCopy];

    // the value is the representedObject of the menu item describing the NSNumber

    // containing an NSImageScaling (scaling factor)

    NSPopUpButton *popupButton = sender;

    NSNumber *scalingFactor = [[popupButton selectedItem] representedObject];

    // replace out the old scaling factor with the new

    [screenOptions setObject:scalingFactor forKey:NSWorkspaceDesktopImageScalingKey];

    NSError *error = nil;

    NSURL *imageURL = [[NSWorkspace sharedWorkspace] desktopImageURLForScreen:curScreen];

    if (![[NSWorkspace sharedWorkspace] setDesktopImageURL:imageURL

                                                 forScreen:curScreen

                                                   options:screenOptions

                                                     error:&error])

    {

        [self presentError:error];

    }

    [screenOptions release];

}

- (IBAction)allowClippingAction:(id)sender

{

    // get the current screen options

    NSMutableDictionary *screenOptions =

        [[[NSWorkspace sharedWorkspace] desktopImageOptionsForScreen:curScreen] mutableCopy];

    // the value is an NSNumber containing a BOOL (allow clipping)

    NSButton *checkbox = sender;

    NSNumber *allowClipping = [NSNumber numberWithBool:[checkbox state]];

    // replace out the old clip value with the new

    [screenOptions setObject:allowClipping forKey:NSWorkspaceDesktopImageAllowClippingKey];

    NSError *error = nil;

    NSURL *imageURL = [[NSWorkspace sharedWorkspace] desktopImageURLForScreen:curScreen];

    if (![[NSWorkspace sharedWorkspace] setDesktopImageURL:imageURL

                                                 forScreen:curScreen

                                                   options:screenOptions

                                                     error:&error])

    {

        [self presentError:error];

    }

    [screenOptions release];

}

- (IBAction)fillColorAction:(id)sender

{

    // get the current screen options

    NSMutableDictionary *screenOptions =

        [[[NSWorkspace sharedWorkspace] desktopImageOptionsForScreen:curScreen] mutableCopy];

    // the value is an NSColor (fill color)

    NSColorWell *colorWell = sender;

    NSColor *fillColorValue = [colorWell color];

    // replace out the old fill color with the new

    [screenOptions setObject:fillColorValue forKey:NSWorkspaceDesktopImageFillColorKey];

    NSError *error = nil;

    NSURL *imageURL = [[NSWorkspace sharedWorkspace] desktopImageURLForScreen:curScreen];

    if (![[NSWorkspace sharedWorkspace] setDesktopImageURL:imageURL

                                                 forScreen:curScreen

                                                   options:screenOptions

                                                     error:&error])

    {

        [self presentError:error];

    }

    [screenOptions release];

}

@end