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Create a window and exit the edge of the screen

I am trying to overwrite the application that I have for Windows in Objective-C for my Mac, and I want to be able to do something like Mac hot corners. If I move the mouse to the left side of the screen, it will make the window visible; if I move it outside the window, the window will disappear again. (the window will be shifted to the left on the screen).

Does anyone know where I can find a demo code (or link) on how to do this, or at least find out where the mouse is, even if the current application is not on top. (not sure how to say it, too accustomed to the Windows world).

thanks

-Brad

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4 answers

. .

   @interface SlidingWindow : NSWindow
    {
        CGRectEdge _slidingEdge;
        NSView *_wrapperView;
    }


    @property (nonatomic, assign) CGRectEdge slidingEdge;
    @property (nonatomic, retain) NSView *wrapperView;

    -(id)initWithContentRect:(NSRect) contentRect 
                   styleMask:(unsigned int) styleMask 
                     backing:(NSBackingStoreType) backingType 
                       defer:(BOOL) flag;

    - (NSView*)wrapperViewWithFrame:(NSRect)bounds;

    - (BOOL)mayOrderOut;

    @end

    @interface SlidingWindow ()

    - (void)adjustWrapperView;

    - (void)setWindowWidth:(NSNumber*)width;
    - (void)setWindowHeight:(NSNumber*)height;

    @end


    @implementation SlidingWindow


@synthesize slidingEdge = _slidingEdge;
@synthesize wrapperView = _wrapperView;


- (id)initWithContentRect:(NSRect) contentRect 
                styleMask:(unsigned int) styleMask 
                  backing:(NSBackingStoreType) backingType 
                    defer:(BOOL) flag
{

    if ((self = [super initWithContentRect:contentRect
                                 styleMask:NSBorderlessWindowMask 
                                   backing:backingType
                                     defer:flag])) {
        /* May want to setup some other options, 
         like transparent background or something */

        [self setSlidingEdge:CGRectMaxYEdge];
        [self setHidesOnDeactivate:YES];
        [self setCollectionBehavior:NSWindowCollectionBehaviorCanJoinAllSpaces];
    }

    return self;
}

- (NSView*)wrapperViewWithFrame:(NSRect)bounds
{
    return [[[NSView alloc] initWithFrame:bounds] autorelease];
}

- (void)adjustWrapperView
{
    if (self.wrapperView == nil) {
        NSRect frame = [self frame];
        NSRect bounds = NSMakeRect(0, 0, frame.size.width, frame.size.height);
        NSView *wrapperView = [self wrapperViewWithFrame:bounds];
        NSArray *subviews =  [[[[self contentView] subviews] copy] autorelease];

        for (NSView *view in subviews) {
            [wrapperView addSubview:view];
        }

        [wrapperView setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];
        [[self contentView] addSubview:wrapperView];

        self.wrapperView = wrapperView;
    }

    switch (self.slidingEdge) {
        case CGRectMaxXEdge:
            [self.wrapperView setAutoresizingMask:(NSViewHeightSizable | NSViewMaxXMargin)];
            break;

        case CGRectMaxYEdge:
            [self.wrapperView setAutoresizingMask:(NSViewWidthSizable | NSViewMaxYMargin)];
            break;

        case CGRectMinXEdge:
            [self.wrapperView setAutoresizingMask:(NSViewHeightSizable | NSViewMinXMargin)];
            break;

        case CGRectMinYEdge:
        default:
            [self.wrapperView setAutoresizingMask:(NSViewWidthSizable | NSViewMinYMargin)];
    }
}

- (void)makeKeyAndOrderFront:(id)sender
{
    [self adjustWrapperView];

    if ([self isVisible]) {
        [super makeKeyAndOrderFront:sender];
    }
    else {
        NSRect screenRect = [[NSScreen menubarScreen] visibleFrame];
        NSRect windowRect = [self frame];

        CGFloat x;
        CGFloat y;
        NSRect startWindowRect;
        NSRect endWindowRect;

        switch (self.slidingEdge) {
            case CGRectMinXEdge:
                x = 0;
                y = (screenRect.size.height - windowRect.size.height) / 2 + screenRect.origin.y;
                startWindowRect = NSMakeRect(x - windowRect.size.width, y, 0, windowRect.size.height);
                break;

            case CGRectMinYEdge:
                x = (screenRect.size.width - windowRect.size.width) / 2 + screenRect.origin.x;
                y = 0;
                startWindowRect = NSMakeRect(x, y - windowRect.size.height, windowRect.size.width, 0);
                break;

            case CGRectMaxXEdge:
                x = screenRect.size.width - windowRect.size.width + screenRect.origin.x;
                y = (screenRect.size.height - windowRect.size.height) / 2 + screenRect.origin.y;
                startWindowRect = NSMakeRect(x + windowRect.size.width, y, 0, windowRect.size.height);
                break;

            case CGRectMaxYEdge:
            default:
                x = (screenRect.size.width - windowRect.size.width) / 2 + screenRect.origin.x;
                y = screenRect.size.height - windowRect.size.height + screenRect.origin.y;
                startWindowRect = NSMakeRect(x, y + windowRect.size.height, windowRect.size.width, 0);
        }

        endWindowRect = NSMakeRect(x, y, windowRect.size.width, windowRect.size.height);

        [self setFrame:startWindowRect display:NO animate:NO];

        [super makeKeyAndOrderFront:sender];

        [self setFrame:endWindowRect display:YES animate:YES];

        [self performSelector:@selector(makeResizable)
                   withObject:nil
                   afterDelay:1];
    }
}

- (void)makeResizable
{
    NSView *wrapperView = self.wrapperView;
    NSRect frame = [self frame];
    NSRect bounds = NSMakeRect(0, 0, frame.size.width, frame.size.height);

    [wrapperView setFrame:bounds];
    [wrapperView setAutoresizingMask:(NSViewWidthSizable | NSViewHeightSizable)];
}

- (void)orderOut:(id)sender
{
    [self adjustWrapperView];

    NSRect startWindowRect = [self frame];
    NSRect endWindowRect;

    switch (self.slidingEdge) {
        case CGRectMinXEdge:
            endWindowRect = NSMakeRect(startWindowRect.origin.x, 
                                       startWindowRect.origin.y,
                                       0,
                                       startWindowRect.size.height);
            break;

        case CGRectMinYEdge:
            endWindowRect = NSMakeRect(startWindowRect.origin.x, 
                                       startWindowRect.origin.y, 
                                       startWindowRect.size.width, 
                                       0);
            break;

        case CGRectMaxXEdge:
            endWindowRect = NSMakeRect(startWindowRect.origin.x + startWindowRect.size.width, 
                                       startWindowRect.origin.y,
                                       0,
                                       startWindowRect.size.height);
            break;

        case CGRectMaxYEdge:
        default:
            endWindowRect = NSMakeRect(startWindowRect.origin.x, 
                                       startWindowRect.origin.y + startWindowRect.size.height, 
                                       startWindowRect.size.width, 
                                       0);
    }

    [self setFrame:endWindowRect display:YES animate:YES];

    switch (self.slidingEdge) {
        case CGRectMaxXEdge:
        case CGRectMinXEdge:
            if (startWindowRect.size.width > 0) {
                [self performSelector:@selector(setWindowWidth:)
                           withObject:[NSNumber numberWithDouble:startWindowRect.size.width]
                           afterDelay:0];
            }
            break;

        case CGRectMaxYEdge:
        case CGRectMinYEdge:
        default:
            if (startWindowRect.size.height > 0) {
                [self performSelector:@selector(setWindowHeight:)
                           withObject:[NSNumber numberWithDouble:startWindowRect.size.height]
                           afterDelay:0];
            }
    }

    [super orderOut:sender];
}

- (void)setWindowWidth:(NSNumber*)width
{
    NSRect startWindowRect = [self frame];
    NSRect endWindowRect = NSMakeRect(startWindowRect.origin.x, 
                                      startWindowRect.origin.y, 
                                      [width doubleValue],
                                      startWindowRect.size.height);

    [self setFrame:endWindowRect display:NO animate:NO];    
}

- (void)setWindowHeight:(NSNumber*)height
{
    NSRect startWindowRect = [self frame];
    NSRect endWindowRect = NSMakeRect(startWindowRect.origin.x, 
                                      startWindowRect.origin.y, 
                                      startWindowRect.size.width, 
                                      [height doubleValue]);

    [self setFrame:endWindowRect display:NO animate:NO];    
}

- (void)resignKeyWindow
{
    [self orderOut:self];

    [super resignKeyWindow];
}

- (BOOL)canBecomeKeyWindow
{
    return YES;
}

- (void)performClose:(id)sender
{
    [self close];
}

- (void)dealloc
{
    [_wrapperView release], _wrapperView = nil;

    [super dealloc];
}

@end


@implementation NSScreen (MenubarScreen)

+ (NSScreen*)menubarScreen
{
    NSArray *screens = [self screens];

    if ([screens count] > 0) {
        return [screens objectAtIndex:0];
    }

    return nil;
}
@end
+1

, . .

, , , :

[self setBackgroundColor:[NSColor clearColor]];
[self setExcludedFromWindowsMenu:YES];
[self setCanHide:NO];
[self setLevel:NSScreenSaverWindowLevel];
[self setAlphaValue:0.0f];
[self setOpaque:NO];
[self orderFrontRegardless];

, ,

[self setAcceptsMouseMovedEvents:YES];

:

- (void)mouseMoved:(NSEvent *)theEvent
{
   NSLog(@"mouse moved into invisible window.");
}

, , .

+2

AutoHidingWindow - SlidingWindow, , . .

@interface ActivationWindow : NSWindow
{
    AutoHidingWindow *_activationDelegate;
    NSTrackingArea *_trackingArea;
}

- (ActivationWindow*)initWithDelegate:(AutoHidingWindow*)activationDelegate;

@property (assign) AutoHidingWindow *activationDelegate;
@property (retain) NSTrackingArea *trackingArea;

- (void)adjustWindowFrame;
- (void)adjustTrackingArea;

@end

@interface AutoHidingWindow ()

- (void)autoShow;
- (void)autoHide;

@end 


@implementation AutoHidingWindow

- (id)initWithContentRect:(NSRect) contentRect 
                styleMask:(unsigned int) styleMask 
                  backing:(NSBackingStoreType) backingType 
                    defer:(BOOL) flag
{

    if ((self = [super initWithContentRect:contentRect
                                 styleMask:NSBorderlessWindowMask 
                                   backing:backingType
                                     defer:flag])) {
        _activationWindow = [[ActivationWindow alloc] initWithDelegate:self];
    }

    return self;
}

@synthesize activationWindow = _activationWindow;

- (void)dealloc
{
    [_activationWindow release], _activationWindow = nil;

    [super dealloc];
}

- (void)makeKeyAndOrderFront:(id)sender
{
    [super makeKeyAndOrderFront:sender];

}

- (void)autoShow
{
    [self makeKeyAndOrderFront:self];

    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(autoHide) object:nil];
    [self performSelector:@selector(autoHide) withObject:nil afterDelay:2];
}

- (void)autoHide
{
    NSPoint mouseLocation = [NSEvent mouseLocation];
    NSRect windowFrame = [self frame];

    if (NSPointInRect(mouseLocation, windowFrame)) {
        [self performSelector:@selector(autoHide) withObject:nil afterDelay:2];
    }
    else {
        [self orderOut:self];
    }
}

@end


@implementation ActivationWindow 

- (ActivationWindow*)initWithDelegate:(AutoHidingWindow*)activationDelegate
{   
    if ((self = [super initWithContentRect:[[NSScreen mainScreen] frame]
                                 styleMask:NSBorderlessWindowMask
                                   backing:NSBackingStoreBuffered
                                     defer:NO]) != nil) {
        _activationDelegate = activationDelegate;

        [self setBackgroundColor:[NSColor clearColor]];
        [self setExcludedFromWindowsMenu:YES];
        [self setCanHide:NO];
        [self setHasShadow:NO];
        [self setLevel:NSScreenSaverWindowLevel];
        [self setAlphaValue:0.0];
        [self setIgnoresMouseEvents:YES];
        [self setOpaque:NO];
        [self orderFrontRegardless];

        [self adjustWindowFrame];
        [self.activationDelegate addObserver:self
                                 forKeyPath:@"slidingEdge"
                                    options:0
                                    context:@"slidingEdge"];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(screenParametersChanged:) 
                                                     name:NSApplicationDidChangeScreenParametersNotification 
                                                   object:nil];     
    }

    return self;
}

@synthesize activationDelegate = _activationDelegate;
@synthesize trackingArea = _trackingArea;

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if ([@"slidingEdge" isEqual:context]) {
        [self adjustTrackingArea];
    }
    else {
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}


- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];

    [self.activationDelegate removeObserver:self forKeyPath:@"slidingEdge"];
    _activationDelegate = nil;

    [_trackingArea release], _trackingArea = nil;

    [super dealloc];
}

- (void)screenParametersChanged:(NSNotification *)notification
{
    [self adjustWindowFrame];
}

- (void)adjustWindowFrame
{
    NSScreen *mainScreen = [NSScreen mainScreen];
    CGFloat menuBarHeight = [NSMenuView menuBarHeight];
    NSRect windowFrame = [mainScreen frame];

    windowFrame.size.height -= menuBarHeight;

    [self setFrame:windowFrame display:NO];
    [self adjustTrackingArea];
}

- (void)adjustTrackingArea
{
    NSView *contentView = [self contentView];
    NSRect trackingRect = contentView.bounds;   
    CGRectEdge slidingEdge = self.activationDelegate.slidingEdge;
    CGFloat trackingRectSize = 2.0;

    switch (slidingEdge) {
        case CGRectMaxXEdge:
            trackingRect.origin.x = trackingRect.origin.x + trackingRect.size.width - trackingRectSize;
            trackingRect.size.width = trackingRectSize;
            break;

        case CGRectMaxYEdge:
            trackingRect.origin.y = trackingRect.origin.y + trackingRect.size.height - trackingRectSize;
            trackingRect.size.height = trackingRectSize;
            break;

        case CGRectMinXEdge:
            trackingRect.origin.x = 0;
            trackingRect.size.width = trackingRectSize;
            break;

        case CGRectMinYEdge:
        default:
            trackingRect.origin.y = 0;
            trackingRect.size.height = trackingRectSize;
    }


    NSTrackingAreaOptions options =
    NSTrackingMouseEnteredAndExited | NSTrackingMouseMoved |
    NSTrackingActiveAlways |
    NSTrackingEnabledDuringMouseDrag;

    NSTrackingArea *trackingArea = self.trackingArea;

    if (trackingArea != nil) {
        [contentView removeTrackingArea:trackingArea];
    }

    trackingArea = [[NSTrackingArea alloc] initWithRect:trackingRect
                                                options:options
                                                  owner:self
                                               userInfo:nil];

    [contentView addTrackingArea:trackingArea];

    self.trackingArea = [trackingArea autorelease];
}

- (void)mouseEntered:(NSEvent *)theEvent
{
    [self.activationDelegate autoShow];
}


- (void)mouseMoved:(NSEvent *)theEvent
{
    [self.activationDelegate autoShow];
}

- (void)mouseExited:(NSEvent *)theEvent
{
}

@end
+2

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