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/*****************************************************************************
 * fspanel.m: MacOS X full screen panel
 *****************************************************************************
 * Copyright (C) 2006 the VideoLAN team
 * $Id$
 *
 * Authors: Jrme Decoodt <djc at videolan dot org>
 *          Felix Khne <fkuehne at videolan dot org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#import "intf.h"
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#import "controls.h"
#import "vout.h"
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#import "fspanel.h"

#define KEEP_VISIBLE_AFTER_ACTION 4 /* time in half-sec until this panel will hide again after an user's action */

/*****************************************************************************
 * VLCFSPanel
 *****************************************************************************/
@implementation VLCFSPanel
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/* We override this initializer so we can set the NSBorderlessWindowMask styleMask, and set a few other important settings */
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- (id)initWithContentRect:(NSRect)contentRect 
                styleMask:(unsigned int)aStyle 
                  backing:(NSBackingStoreType)bufferingType 
                    defer:(BOOL)flag
{
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    id win = [super initWithContentRect:contentRect styleMask:NSTexturedBackgroundWindowMask backing:bufferingType defer:flag];
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    [win setOpaque:NO];
    [win setHasShadow: NO];
    [win setBackgroundColor:[NSColor clearColor]];
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    /* let the window sit on top of everything else and start out completely transparent */
    [win setLevel:NSFloatingWindowLevel];
    [win setAlphaValue:0.0];
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    i_device = 0;

    [win center];
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    return win;
}

- (void)awakeFromNib
{
    [self setContentView:[[VLCFSPanelView alloc] initWithFrame: [self frame]]];
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    BOOL isInside = (NSPointInRect([NSEvent mouseLocation],[self frame]));
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    [[self contentView] addTrackingRect:[[self contentView] bounds] owner:self userData:nil assumeInside:isInside];
    if (isInside)
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        [self mouseEntered:NULL];
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    if (!isInside)
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        [self mouseExited:NULL];
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}

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/* Windows created with NSBorderlessWindowMask normally can't be key, but we want ours to be */
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- (BOOL)canBecomeKeyWindow
{
    return YES;
}

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- (BOOL)mouseDownCanMoveWindow
{
    return YES;
}

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-(void)dealloc
{
    if( hideAgainTimer )
        [hideAgainTimer release];
    [self setFadeTimer:nil];
    [super dealloc];
}

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-(void)center
{
    /* centre the panel in the lower third of the screen */
    NSPoint theCoordinate;
    NSRect theScreensFrame;
    NSRect theWindowsFrame;

    if( i_device < 0 || i_device >= (signed int)[[NSScreen screens] count] )
        /* invalid preferences or none specified, using main screen */
        theScreensFrame = [[NSScreen mainScreen] frame];
    else
        /* user-defined screen */
        theScreensFrame = [[[NSScreen screens] objectAtIndex: i_device] frame];

    theWindowsFrame = [self frame];
    
    theCoordinate.x = (theScreensFrame.size.width - theWindowsFrame.size.width) / 2 + theScreensFrame.origin.x;
    theCoordinate.y = (theScreensFrame.size.height / 3) - theWindowsFrame.size.height + theScreensFrame.origin.y;
    [self setFrameTopLeftPoint: theCoordinate];
}

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- (void)setPlay
{
    [[self contentView] setPlay];
}

- (void)setPause
{
    [[self contentView] setPause];
}

- (void)setStreamTitle:(NSString *)o_title
{
    [[self contentView] setStreamTitle: o_title];
}

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- (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
{
    [[self contentView] setStreamPos:f_pos andTime: o_time];
}

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- (void)setSeekable:(BOOL) b_seekable
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{
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    [[self contentView] setSeekable: b_seekable];
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}

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- (void)setVolumeLevel: (float)f_volumeLevel
{
    [[self contentView] setVolumeLevel: f_volumeLevel];
}

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/* This routine is called repeatedly to fade in the window */
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- (void)focus:(NSTimer *)timer
{
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    /* we need to push ourselves to front if the vout window was closed since our last display */
    if( b_voutWasUpdated )
    {
        [self orderFront: self];
        b_voutWasUpdated = NO;
    }

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    if( [self alphaValue] < 1.0 )
        [self setAlphaValue:[self alphaValue]+0.1];
    if( [self alphaValue] >= 1.0 )
    {
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        b_displayed = YES;
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        [self setAlphaValue: 1.0];
        [self setFadeTimer:nil];
        if( b_fadeQueued )
        {
            b_fadeQueued=NO;
            [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(unfocus:) userInfo:NULL repeats:YES]];
        }
    }
}

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/* This routine is called repeatedly to hide the window */
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- (void)unfocus:(NSTimer *)timer
{
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    if( b_keptVisible )
    {
        b_keptVisible = NO;
        b_fadeQueued = NO;
        [[self fadeTimer] release];
        [self setFadeTimer: NULL];
        [self fadeIn];
        return;
    }
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    if( [self alphaValue] > 0.0 )
        [self setAlphaValue:[self alphaValue]-0.1];
    if( [self alphaValue] <= 0.1 )
    {
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        b_displayed = NO;
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        [self setAlphaValue:0.0];
        [self setFadeTimer:nil];
        if( b_fadeQueued )
        {
            b_fadeQueued=NO;
            [self setFadeTimer:
                [NSTimer scheduledTimerWithTimeInterval:0.1 
                                                 target:self 
                                               selector:@selector(focus:) 
                                               userInfo:NULL 
                                                repeats:YES]];
        }
    }
}

- (void)mouseExited:(NSEvent *)theEvent
{
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    /* give up our focus, so the vout may show us again without letting the user clicking it */
    if( [[[[VLCMain sharedInstance] getControls] getVoutView] isFullscreen] )
        [[[[[VLCMain sharedInstance] getControls] getVoutView] window] makeKeyWindow];
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}

- (void)fadeIn
{
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    /* in case that the user don't want us to appear, just return here */
    if(! config_GetInt( VLCIntf, "macosx-fspanel" ) )
        return;
    
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    if( [self alphaValue] < 1.0 )
    {
        if (![self fadeTimer])
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            [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(focus:) userInfo:[NSNumber numberWithShort:1] repeats:YES]];
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        else if ([[[self fadeTimer] userInfo] shortValue]==0)
            b_fadeQueued=YES;
    }
    [self autoHide];
}

- (void)fadeOut
{
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    if( NSPointInRect([NSEvent mouseLocation],[self frame]))
        return;

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    if( ( [self alphaValue] > 0.0 ) )
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    {
        if (![self fadeTimer])
            [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(unfocus:) userInfo:[NSNumber numberWithShort:0] repeats:YES]];
        else if ([[[self fadeTimer] userInfo] shortValue]==1)
            b_fadeQueued=YES;
    }
}

/* triggers a timer to autoHide us again after some seconds of no activity */
- (void)autoHide
{
    /* this will tell the timer to start over again or to start at all */
    b_keptVisible = YES;
    
    /* get us a valid timer */
    if(! b_alreadyCounting )
    {
        hideAgainTimer = [NSTimer scheduledTimerWithTimeInterval: 0.5
                                                          target: self 
                                                        selector: @selector(keepVisible:)
                                                        userInfo: nil 
                                                         repeats: YES];
        [hideAgainTimer fire];
        [hideAgainTimer retain];
        b_alreadyCounting = YES;
    }
}

- (void)keepVisible:(NSTimer *)timer
{
    /* if the user triggered an action, start over again */
    if( b_keptVisible )
    {
        i_timeToKeepVisibleInSec = KEEP_VISIBLE_AFTER_ACTION;
        b_keptVisible = NO;
    }
    
    /* count down until we hide ourselfes again and do so if necessary */
    i_timeToKeepVisibleInSec -= 1;
    if( i_timeToKeepVisibleInSec < 1 )
    {
        [self fadeOut];
        [timer invalidate];
        [timer release];
        b_alreadyCounting = NO;
        timer = NULL;
    }
}

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/* A getter and setter for our main timer that handles window fading */
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- (NSTimer *)fadeTimer
{
    return fadeTimer;
}

- (void)setFadeTimer:(NSTimer *)timer
{
    [timer retain];
    [fadeTimer invalidate];
    [fadeTimer release];
    fadeTimer=timer;
}

- (void)mouseDown:(NSEvent *)theEvent
{
    mouseClic = [theEvent locationInWindow];
}

- (void)mouseDragged:(NSEvent *)theEvent
{
    NSPoint point = [NSEvent mouseLocation];
    point.x -= mouseClic.x;
    point.y -= mouseClic.y;
    [self setFrameOrigin:point];
}
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- (BOOL)isDisplayed
{
    return b_displayed;
}

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- (void)setVoutWasUpdated: (int)i_newdevice;
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{
    b_voutWasUpdated = YES;
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    if( i_newdevice != i_device )
    {
        i_device = i_newdevice;
        [self center];
    }
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}
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@end

/*****************************************************************************
 * FSPanelView
 *****************************************************************************/
@implementation VLCFSPanelView

#define addButton( o_button, imageOff, imageOn, _x, _y, action )                                \
    s_rc.origin.x = _x;                                                                         \
    s_rc.origin.y = _y;                                                                         \
    o_button = [[NSButton alloc] initWithFrame: s_rc];                                 \
    [o_button setButtonType: NSMomentaryChangeButton];                                          \
    [o_button setBezelStyle: NSRegularSquareBezelStyle];                                        \
    [o_button setBordered: NO];                                                                 \
    [o_button setFont:[NSFont systemFontOfSize:0]];                                             \
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    [o_button setImage:[NSImage imageNamed:imageOff]];                                 \
    [o_button setAlternateImage:[NSImage imageNamed:imageOn]];                         \
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    [o_button sizeToFit];                                                                       \
    [o_button setTarget: self];                                                                 \
    [o_button setAction: @selector(action:)];                                                   \
    [self addSubview:o_button];

#define addTextfield( o_text, align, font, color, size )                                    \
    o_text = [[NSTextField alloc] initWithFrame: s_rc];                            \
    [o_text setDrawsBackground: NO];                                                        \
    [o_text setBordered: NO];                                                               \
    [o_text setEditable: NO];                                                               \
    [o_text setSelectable: NO];                                                             \
    [o_text setStringValue: _NS("(no item is being played)")];                                                    \
    [o_text setAlignment: align];                                                           \
    [o_text setTextColor: [NSColor color]];                                                 \
    [o_text setFont:[NSFont font:[NSFont smallSystemFontSize] - size]];                     \
    [self addSubview:o_text];

- (id)initWithFrame:(NSRect)frameRect
{
    id view = [super initWithFrame:frameRect];
    fillColor = [[NSColor clearColor] retain];
    NSRect s_rc = [self frame];
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    addButton( o_prev, @"fs_skip_previous" , @"fs_skip_previous_highlight", 174, 15, prev );
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    addButton( o_bwd, @"fs_rewind"        , @"fs_rewind_highlight"       , 211, 14, backward );
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    addButton( o_play, @"fs_play"          , @"fs_play_highlight"         , 267, 10, play );
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    addButton( o_fwd, @"fs_forward"       , @"fs_forward_highlight"      , 313, 14, forward );
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    addButton( o_next, @"fs_skip_next"     , @"fs_skip_next_highlight"    , 365, 15, next );
    addButton( o_fullscreen, @"fs_exit_fullscreen", @"fs_exit_fullscreen_hightlight", 507, 13, windowAction );
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/*
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    addButton( o_button, @"image (off state)", @"image (on state)", 38, 51, something );
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 */
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    /* time slider */
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    s_rc = [self frame];
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    s_rc.origin.x = 15;
    s_rc.origin.y = 53;
    s_rc.size.width = 518;
    s_rc.size.height = 9;
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    o_fs_timeSlider = [[VLCFSTimeSlider alloc] initWithFrame: s_rc];
    [o_fs_timeSlider setMinValue:0];
    [o_fs_timeSlider setMaxValue:10000];
    [o_fs_timeSlider setFloatValue: 0];
    [o_fs_timeSlider setContinuous: YES];
    [o_fs_timeSlider setTarget: self];
    [o_fs_timeSlider setAction: @selector(fsTimeSliderUpdate:)];
    [self addSubview: o_fs_timeSlider];
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    /* volume slider */
    s_rc = [self frame];
    s_rc.origin.x = 26;
    s_rc.origin.y = 17.5;
    s_rc.size.width = 95;
    s_rc.size.height = 10;
    o_fs_volumeSlider = [[VLCFSVolumeSlider alloc] initWithFrame: s_rc];
    [o_fs_volumeSlider setMinValue:0];
    [o_fs_volumeSlider setMaxValue:32];
    [o_fs_volumeSlider setFloatValue: 0];
    [o_fs_volumeSlider setContinuous: YES];
    [o_fs_volumeSlider setTarget: self];
    [o_fs_volumeSlider setAction: @selector(fsVolumeSliderUpdate:)];
    [self addSubview: o_fs_volumeSlider];
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    /* time counter and stream title output fields */
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    s_rc = [self frame];
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    s_rc.origin.x = 98;
    s_rc.origin.y = 64;
    s_rc.size.width = 352;
    s_rc.size.height = 14;
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    addTextfield( o_streamTitle_txt, NSCenterTextAlignment, systemFontOfSize, whiteColor, 0 );
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    s_rc.origin.x = 486;
    s_rc.origin.y = 64;
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    s_rc.size.width = 50;
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    addTextfield( o_streamPosition_txt, NSRightTextAlignment, systemFontOfSize, whiteColor, 0 );
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    return view;
}

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- (void)dealloc
{
    [o_fs_timeSlider release];
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    [o_fs_volumeSlider release];
    [o_prev release];
    [o_next release];
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    [o_bwd release];
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    [o_play release];
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    [o_fwd release];
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    [o_fullscreen release];
    [o_streamTitle_txt release];
    [o_streamPosition_txt release];
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    [super dealloc];
}

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- (void)setPlay
{
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    [o_play setImage:[NSImage imageNamed:@"fs_play"]];
    [o_play setAlternateImage: [NSImage imageNamed:@"fs_play_highlight"]];
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}

- (void)setPause
{
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    [o_play setImage: [NSImage imageNamed:@"fs_pause"]];
    [o_play setAlternateImage: [NSImage imageNamed:@"fs_pause_highlight"]];
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}

- (void)setStreamTitle:(NSString *)o_title
{
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    [o_streamTitle_txt setStringValue: o_title];
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}

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- (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
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{
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    [o_streamPosition_txt setStringValue: o_time];
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    [o_fs_timeSlider setFloatValue: f_pos];
}
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- (void)setSeekable:(BOOL)b_seekable
{
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    [o_bwd setEnabled: b_seekable];
    [o_fwd setEnabled: b_seekable];
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    [o_fs_timeSlider setEnabled: b_seekable];
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}

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- (void)setVolumeLevel: (float)f_volumeLevel
{
    [o_fs_volumeSlider setFloatValue: f_volumeLevel];
}

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- (IBAction)play:(id)sender
{
    [[[VLCMain sharedInstance] getControls] play: sender];
}

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- (IBAction)forward:(id)sender
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{
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    [[[VLCMain sharedInstance] getControls] forward: sender];
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}

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- (IBAction)backward:(id)sender
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{
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    [[[VLCMain sharedInstance] getControls] backward: sender];
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}

- (IBAction)prev:(id)sender
{
    [[[VLCMain sharedInstance] getControls] prev: sender];
}

- (IBAction)next:(id)sender
{
    [[[VLCMain sharedInstance] getControls] next: sender];
}

- (IBAction)windowAction:(id)sender
{
    [[[VLCMain sharedInstance] getControls] windowAction: sender];
}

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- (IBAction)fsTimeSliderUpdate:(id)sender
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{
    [[VLCMain sharedInstance] timesliderUpdate: sender];
}

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- (IBAction)fsVolumeSliderUpdate:(id)sender
{
    [[[VLCMain sharedInstance] getControls] volumeSliderUpdated: sender];
}

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#define addImage(image, _x, _y, mode, _width)                                               \
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    img = [NSImage imageNamed:image];                                              \
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    image_rect.size = [img size];                                                           \
    image_rect.origin.x = 0;                                                                \
    image_rect.origin.y = 0;                                                                \
    frame.origin.x = _x;                                                                    \
    frame.origin.y = _y;                                                                    \
    frame.size = [img size];                                                                \
    if( _width ) frame.size.width = _width;                                                 \
    [img drawInRect:frame fromRect:image_rect operation:mode fraction:1];

- (void)drawRect:(NSRect)rect
{
	NSRect frame = [self frame];
    NSRect image_rect;
    NSImage *img;
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    addImage( @"fs_background", 0, 0, NSCompositeCopy, 0 );
    addImage( @"fs_volume_slider_bar", 26, 22, NSCompositeSourceOver, 0 );
    addImage( @"fs_volume_mute", 16, 18, NSCompositeSourceOver, 0 );
    addImage( @"fs_volume_max", 124, 17, NSCompositeSourceOver, 0 );
    addImage( @"fs_time_slider", 15, 53, NSCompositeSourceOver, 0);
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}

@end

/*****************************************************************************
 * VLCFSTimeSlider
 *****************************************************************************/
@implementation VLCFSTimeSlider
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- (void)drawKnobInRect:(NSRect)knobRect
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{
    NSRect image_rect;
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    NSImage *img = [NSImage imageNamed:@"fs_time_slider_knob_highlight"];
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    image_rect.size = [img size];
    image_rect.origin.x = 0;
    image_rect.origin.y = 0;
    knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
    knobRect.size.width = image_rect.size.width;
    knobRect.size.height = image_rect.size.height;
    [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
}

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- (void)drawRect:(NSRect)rect
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{
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    /* Draw default to make sure the slider behaves correctly */
    [[NSGraphicsContext currentContext] saveGraphicsState];
    NSRectClip(NSZeroRect);
    [super drawRect:rect];
    [[NSGraphicsContext currentContext] restoreGraphicsState];
    
    NSRect knobRect = [[self cell] knobRectFlipped:NO];
    knobRect.origin.y+=7.5;
    [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
    [self drawKnobInRect: knobRect];
}

@end

/*****************************************************************************
* VLCFSVolumeSlider
*****************************************************************************/
@implementation VLCFSVolumeSlider
- (void)drawKnobInRect:(NSRect) knobRect
{
    NSRect image_rect;
    NSImage *img = [NSImage imageNamed:@"fs_volume_slider_knob"];
    image_rect.size = [img size];
    image_rect.origin.x = 0;
    image_rect.origin.y = 0;
    knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
    knobRect.size.width = image_rect.size.width;
    knobRect.size.height = image_rect.size.height;
    [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
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}

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- (void)drawRect:(NSRect)rect
{
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    /* Draw default to make sure the slider behaves correctly */
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    [[NSGraphicsContext currentContext] saveGraphicsState];
    NSRectClip(NSZeroRect);
    [super drawRect:rect];
    [[NSGraphicsContext currentContext] restoreGraphicsState];
    
    NSRect knobRect = [[self cell] knobRectFlipped:NO];
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    knobRect.origin.y+=6;
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    [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
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    [self drawKnobInRect: knobRect];
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}

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@end