UKDockProgressIndicator.m

//
//  UKDockProgressIndicator.m
//  Doublette
//	LICENSE: MIT License
//
//  Created by Uli Kusterer on 30.04.05.
//  Copyright 2005 M. Uli Kusterer. All rights reserved.
//

// -----------------------------------------------------------------------------
//	Headers:
// -----------------------------------------------------------------------------

#import "UKDockProgressIndicator.h"


@implementation UKDockProgressIndicator

@synthesize progress;
@synthesize max;
@synthesize min;
@synthesize current;

- (void)dealloc
{
	self.progress = nil;
	[super dealloc];
}

// -----------------------------------------------------------------------------
//	NSProgressIndicator-like methods:
// -----------------------------------------------------------------------------

-(void)setMinValue:(double)mn
{
    min = mn;
    [progress setMinValue: mn];		// Call through to associated view if user wants us to.

    [self updateDockTile];
}

-(double)minValue
{
    return min;
}

-(void)setMaxValue:(double)mn
{
    max = mn;
    [progress setMaxValue: mn];		// Call through to associated view if user wants us to.

    [self updateDockTile];
}

-(double)maxValue
{
    return max;
}

-(void)setDoubleValue:(double)mn
{
    current = mn;
    [progress setDoubleValue: mn];		// Call through to associated view if user wants us to.
	
    [self updateDockTile];
}

-(double)doubleValue
{
    return current;
}

-(void)setNeedsDisplay:(BOOL)mn
{
    [progress setNeedsDisplay: mn];		// Call through to associated view if user wants us to.
}

-(void)display
{
    [progress display];					// Call through to associated view if user wants us to.
}

-(void)setHidden:(BOOL)flag
{
    [progress setHidden: flag];			// Call through to associated view if user wants us to.
    if(flag) // Progress indicator is being hidden? Reset dock tile to regular icon again:
        [NSApp setApplicationIconImage: [NSImage imageNamed: @"NSApplicationIcon"]];
}

-(BOOL)isHidden
{
    return [progress isHidden];
}


// -----------------------------------------------------------------------------
//	updateDockTile:
//		Main drawing bottleneck. This takes our min, max and current values and
//		draws them onto the dock tile. If the MiniProgressGradient.png image is
//		present, this stretches that image to draw the progress bar.
//
//		If no image is present this falls back on the knob color.
// -----------------------------------------------------------------------------

-(void)updateDockTile
{
    NSImage * dockIcon = [[[NSImage alloc] initWithSize: NSMakeSize(128,128)] autorelease];
    
	[dockIcon lockFocus];
    NSRect box = { {4, 4}, {120, 16} };
        
    // App icon:
    [[NSImage imageNamed: @"NSApplicationIcon"] dissolveToPoint: NSZeroPoint fraction: 1.0];
        
    // Track & Outline:
    [[NSColor whiteColor] set];
    [NSBezierPath fillRect: box];
       
    [[NSColor blackColor] set];
    [NSBezierPath strokeRect: box];
        
    // State fill:
    box = NSInsetRect( box, 1, 1 );
    [[NSColor knobColor] set];
       
    box.size.width = (box.size.width / (max -min)) * (current -min);
       
    NSImage * prImg = [NSImage imageNamed: @"MiniProgressGradient"];
    NSRect picBox = { { 0,0 }, { 0,0 } };
		
	if(prImg)
	{
		picBox.size = [prImg size];
		[prImg drawInRect: box fromRect: picBox operation: NSCompositeCopy fraction: 1.0];
	}
	else NSRectFill(box);
    
	[dockIcon unlockFocus];
    [NSApp setApplicationIconImage: dockIcon];
}

@end