/*

 File:      ImageBrowserCell.m

 Abstract:  IKImageBrowserView is a view that can display and browse a 

 large amount of images and movies. This sample code demonstrates 

 how to use the view in a Cocoa Application.

 Version:   1.1

 Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple

 Inc. ("Apple") in consideration of your agreement to the

 following terms, and your use, installation, modification or

 redistribution of this Apple software constitutes acceptance of these

 terms.  If you do not agree with these terms, please do not use,

 install, modify or redistribute this Apple software.

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 subject to these terms, Apple grants you a personal, non-exclusive

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

 "Apple Software"), to use, reproduce, modify and redistribute the Apple

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 without modifications, you must retain this notice and the following

 text and disclaimers in all such redistributions of the Apple Software. 

 Neither the name, trademarks, service marks or logos of Apple Inc.

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

 Software without specific prior written permission from Apple.  Except

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

 or implied, are granted by Apple herein, including but not limited to

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 other works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

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 Copyright © 2008-2009 Apple Inc. All Rights Reserved

 */

#import "ImageBrowserCell.h"

#import "Utilities.h"

//---------------------------------------------------------------------------------

// glossyImage

//

// utilty function that creates, caches and returns the image named glossy.png

//---------------------------------------------------------------------------------

static CGImageRef glossyImage()

{

    static CGImageRef image = NULL;

    if(image == NULL)

        image = createImageWithName(@"glossy.png");

    return image;

}

//---------------------------------------------------------------------------------

// pinImage

//

// utilty function that creates, caches and returns the image named pin.tiff

//---------------------------------------------------------------------------------

static CGImageRef pinImage()

{

    static CGImageRef image = NULL;

    if(image == NULL)

        image = createImageWithName(@"pin.tiff");

    return image;

}

@implementation ImageBrowserCell

- (NSRect) myBackgroundFrame

{

    NSRect imgFrame = [self imageFrame];

    NSRect frame = [self frame];

    imgFrame.size.height += 28;

    imgFrame.origin.y -= 20;

    imgFrame.size.width = frame.size.width;

    imgFrame.origin.x = frame.origin.x;

    return imgFrame;

}

//---------------------------------------------------------------------------------

// layerForType:

//

// provides the layers for the given types

//---------------------------------------------------------------------------------

- (CALayer *) layerForType:(NSString*) type

{

    CGColorRef color;

    //retrieve some usefull rects

    NSRect frame = [self frame];

    NSRect imageFrame = [self imageFrame];

    NSRect relativeImageFrame = NSMakeRect(imageFrame.origin.x - frame.origin.x, imageFrame.origin.y - frame.origin.y, imageFrame.size.width, imageFrame.size.height);

    /* place holder layer */

    if(type == IKImageBrowserCellPlaceHolderLayer){

        //create a place holder layer

        CALayer *layer = [CALayer layer];

        layer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);

        CALayer *placeHolderLayer = [CALayer layer];

        placeHolderLayer.frame = *(CGRect*) &relativeImageFrame;

        float fillComponents[4] = {1.0, 1.0, 1.0, 0.3};

        float strokeComponents[4] = {1.0, 1.0, 1.0, 0.9};

        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

        //set a background color

        color = CGColorCreate(colorSpace, fillComponents);

        [placeHolderLayer setBackgroundColor:color];

        CFRelease(color);

        //set a stroke color

        color = CGColorCreate(colorSpace, strokeComponents);

        [placeHolderLayer setBorderColor:color];

        CFRelease(color);

        [placeHolderLayer setBorderWidth:2.0];

        ////[placeHolderLayer setCornerRadius:10];

        CFRelease(colorSpace);

        [layer addSublayer:placeHolderLayer];

        return layer;

    }

    /* foreground layer */

    if(type == IKImageBrowserCellForegroundLayer){

        //no foreground layer on place holders

        if([self cellState] != IKImageStateReady)

            return nil;

        //create a foreground layer that will contain several childs layer

        CALayer *layer = [CALayer layer];

        layer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);

        NSRect imageContainerFrame = [self myBackgroundFrame];

        NSRect relativeImageContainerFrame = NSMakeRect(imageContainerFrame.origin.x - frame.origin.x, imageContainerFrame.origin.y - frame.origin.y, imageContainerFrame.size.width, imageContainerFrame.size.height);

        //add a glossy overlay

        CALayer *glossyLayer = [CALayer layer];

        glossyLayer.frame = *(CGRect*) &relativeImageContainerFrame;

        [glossyLayer setContents:(id)glossyImage()];

        [layer addSublayer:glossyLayer];

        //add a pin icon

        CALayer *pinLayer = [CALayer layer];

        [pinLayer setContents:(id)pinImage()];

        pinLayer.frame = CGRectMake((frame.size.width/2)-5, frame.size.height - 17, 24, 30);

        [layer addSublayer:pinLayer];

        return layer;

    }

    /* selection layer */

    if(type == IKImageBrowserCellSelectionLayer){

        //create a selection layer

        CALayer *selectionLayer = [CALayer layer];

        frame = [self myBackgroundFrame];

        selectionLayer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);

        float fillComponents[4] = {1.0, 0, 0.5, 0.3};

        float strokeComponents[4] = {1.0, 0.0, 0.5, 1.0};

        //set a background color

        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

        color = CGColorCreate(colorSpace, fillComponents);

        [selectionLayer setBackgroundColor:color];

        CFRelease(color);

        //set a border color

        color = CGColorCreate(colorSpace, strokeComponents);

        [selectionLayer setBorderColor:color];

        CFRelease(color);

        [selectionLayer setBorderWidth:2.0];

        ////[selectionLayer setCornerRadius:5];

        return selectionLayer;

    }

    /* background layer */

    if(type == IKImageBrowserCellBackgroundLayer){

        //no background layer on place holders

        if([self cellState] != IKImageStateReady)

            return nil;

        CALayer *layer = [CALayer layer];

        layer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height);

        NSRect bgFrame  = [self myBackgroundFrame];

        NSRect backgroundRect = NSMakeRect(bgFrame.origin.x - frame.origin.x, bgFrame.origin.y - frame.origin.y, bgFrame.size.width, bgFrame.size.height);      

        CALayer *photoBackgroundLayer = [CALayer layer];

        photoBackgroundLayer.frame = *(CGRect*) &backgroundRect;

        float fillComponents[4] = {0.95, 0.95, 0.95, 1.0};

        float strokeComponents[4] = {0.2, 0.2, 0.2, 0.5};

        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

        color = CGColorCreate(colorSpace, fillComponents);

        [photoBackgroundLayer setBackgroundColor:color];

        CFRelease(color);

        color = CGColorCreate(colorSpace, strokeComponents);

        [photoBackgroundLayer setBorderColor:color];

        CFRelease(color);

        [photoBackgroundLayer setBorderWidth:1.0];

        [photoBackgroundLayer setShadowOpacity:0.5];

        ////[photoBackgroundLayer setCornerRadius:3];

        CFRelease(colorSpace);

        [layer addSublayer:photoBackgroundLayer];

        return layer;

    }

    return nil;

}

//---------------------------------------------------------------------------------

// imageFrame

//

// define where the image should be drawn

//---------------------------------------------------------------------------------

- (NSRect) imageFrame

{

    //get default imageFrame and aspect ratio

    NSRect imageFrame = [super imageFrame];

    if(imageFrame.size.height == 0 || imageFrame.size.width == 0) return NSZeroRect;

    float aspectRatio =  imageFrame.size.width / imageFrame.size.height;

    // compute the rectangle included in container with a margin of at least 10 pixel at the bottom, 5 pixel at the top and keep a correct  aspect ratio

    NSRect container = [self imageContainerFrame];

    container = NSInsetRect(container, 8, 8);

    if(container.size.height <= 0) return NSZeroRect;

    float containerAspectRatio = container.size.width / container.size.height;

    if(containerAspectRatio > aspectRatio){

        imageFrame.size.height = container.size.height;

        imageFrame.origin.y = container.origin.y;

        imageFrame.size.width = imageFrame.size.height * aspectRatio;

        imageFrame.origin.x = container.origin.x + (container.size.width - imageFrame.size.width)*0.5;

    }

    else{

        imageFrame.size.width = container.size.width;

        imageFrame.origin.x = container.origin.x;       

        imageFrame.size.height = imageFrame.size.width / aspectRatio;

        imageFrame.origin.y = container.origin.y + container.size.height - imageFrame.size.height;

    }

    //round it

    imageFrame.origin.x = floorf(imageFrame.origin.x);

    imageFrame.origin.y = floorf(imageFrame.origin.y);

    imageFrame.size.width = ceilf(imageFrame.size.width);

    imageFrame.size.height = ceilf(imageFrame.size.height);

    return imageFrame;

}

//---------------------------------------------------------------------------------

// imageContainerFrame

//

// override the default image container frame

//---------------------------------------------------------------------------------

- (NSRect) imageContainerFrame

{

    NSRect container = [super frame];

    //make the image container 15 pixels up

    container.origin.y += 15;

    container.size.height -= 15;

    return container;

}

//---------------------------------------------------------------------------------

// titleFrame

//

// override the default frame for the title

//---------------------------------------------------------------------------------

- (NSRect) titleFrame

{

    //get the default frame for the title

    NSRect titleFrame = [super titleFrame];

    //move the title inside the 'photo' background image

    NSRect container = [self myBackgroundFrame];

    titleFrame.origin.y = container.origin.y + 3;

    //make sure the title has a 7px margin with the left/right borders

    float margin = titleFrame.origin.x - (container.origin.x + 7);

    if(margin < 0)

        titleFrame = NSInsetRect(titleFrame, -margin, 0);

    return titleFrame;

}

//---------------------------------------------------------------------------------

// selectionFrame

//

// make the selection frame a little bit larger than the default one

//---------------------------------------------------------------------------------

- (NSRect) selectionFrame

{

    return NSInsetRect([self myBackgroundFrame], -5, -5);

}

@end