/*

 File:BordersTitlesView.m

 Abstract: A custom view that draws an image with a border and title strings

 Version: 1.0

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 */

#import "BordersTitlesView.h"

#import "PluginController.h"

@interface BordersTitlesView (Private)

- (NSRect)_imageRect;

@end

@implementation BordersTitlesView

- (void)awakeFromNib

{

    [self setBorderColor:[NSColor whiteColor]];

    [self setBorderWidth:10];

    [self setFullImageSize:NSZeroSize];

}

- (void)dealloc

{

    [_image release];

    [_borderColor release];

    [super dealloc];

}

#pragma mark -

#pragma mark - Accessors

- (NSImage*)image

{

    return _image;

}

- (void)setImage:(NSImage*)image

{

    if ([_image isEqual:image])

        return;

    [_image release];

    _image = [image retain];

    [self setNeedsDisplay:YES];

}

- (NSColor*)borderColor

{

    return _borderColor;

}

- (void)setBorderColor:(NSColor*)color

{

    if ([_borderColor isEqual:color])

        return;

    [_borderColor release];

    _borderColor = [color retain];

    [self setNeedsDisplay:YES];

}

- (float)borderWidth

{

    return _borderWidth;

}

- (void)setBorderWidth:(float)width

{

    if (_borderWidth == width)

        return;

    _borderWidth = width;

    [self setNeedsDisplay:YES];

}

- (NSSize)fullImageSize

{

    return _fullImageSize;

}

- (void)setFullImageSize:(NSSize)size

{

    if (NSEqualSizes(_fullImageSize, size))

        return;

    _fullImageSize = size;

    [self setNeedsDisplay:YES];

}

#pragma mark -

#pragma mark - Drawing

- (NSRect)_imageRectForFrame:(NSRect)frame

{

    NSSize imageSize = [[self image] alignmentRect].size;

    //  Scale the image size to fit the frame

    if (imageSize.width > frame.size.width || imageSize.height > frame.size.height) {

        float xMag, yMag, mag;

        xMag = frame.size.width / imageSize.width;

        yMag = frame.size.height / imageSize.height;

        mag = MIN(xMag, yMag);

        imageSize.width = ceil(imageSize.width * mag);

        imageSize.height = ceil(imageSize.height * mag);

    }

    //  Center the image rect in the frame

    NSPoint drawOrigin;

    drawOrigin.x = frame.origin.x + (frame.size.width - imageSize.width) / 2;

    drawOrigin.y = frame.origin.y + (frame.size.height - imageSize.height) / 2;

    drawOrigin.x = floor(drawOrigin.x);

    drawOrigin.y = floor(drawOrigin.y);

    return NSMakeRect(drawOrigin.x, drawOrigin.y, imageSize.width, imageSize.height);

}

- (void)drawRect:(NSRect)rect

{

    //  Draw the background

    [[NSColor colorWithCalibratedWhite:0.18 alpha:1.0] set];

    NSRectFill(rect);

    //  Clip the rest of the drawing to fit inside the image

    NSRect imageRect = [self _imageRectForFrame:[self bounds]];

    NSRectClip(imageRect);

    //  Draw the scaled image

    [[self image] drawInRect:imageRect fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0];

    [self compositeBordersAndTitlesInRect:imageRect];

}

- (void)compositeBordersAndTitlesInRect:(NSRect)imageRect

{

    //  Draw the border

    float scale = (NSWidth(imageRect) / [self fullImageSize].width);

    float borderWidth = [self borderWidth] * scale;

    NSBezierPath *path = [NSBezierPath bezierPathWithRect:NSInsetRect(imageRect, borderWidth / 2, borderWidth / 2)];

    [path setLineWidth:borderWidth];

    [[self borderColor] set];

    [path stroke];

    //  Draw each title

    NSArray *stringsArray = [_stringsController content];

    unsigned int stringIndex, numStrings = [stringsArray count];

    for (stringIndex = 0; stringIndex < numStrings; stringIndex++)

    {

        NSMutableDictionary *stringDict = [stringsArray objectAtIndex:stringIndex];

        NSAttributedString *attributedString = [stringDict objectForKey:@"attributedString"];

        float stringScale = [[stringDict objectForKey:@"scale"] floatValue];

        NSSize stringSize = [attributedString size];

        stringSize.width *= scale * stringScale;

        stringSize.height *= scale * stringScale;

        if (stringSize.width == 0 || stringSize.height == 0)

            continue;

        NSPoint position = [[stringDict objectForKey:@"position"] pointValue];

        //  Convert position from percent to pixels

        position.x = NSMinX(imageRect) + position.x * NSWidth(imageRect);

        position.y = NSMinY(imageRect) + position.y * NSHeight(imageRect);

        //  Center the string

        position.x = floor(position.x - (stringSize.width) / 2.);

        position.y = floor(position.y - (stringSize.height) / 2.);

        [[NSGraphicsContext currentContext] saveGraphicsState];

        //  Scale the title

        NSAffineTransform *transform = [NSAffineTransform transform];

        [transform translateXBy:position.x yBy:position.y];

        [transform scaleBy:stringScale * scale];

        [transform concat];

        //  Draw the tite

        [attributedString drawAtPoint:NSZeroPoint];

        [[NSGraphicsContext currentContext] restoreGraphicsState];

    }

}

#pragma mark -

#pragma mark - Event Handling

- (void)mouseDown:(NSEvent*)event

{

    NSRect frame = [self bounds];

    NSRect imageRect = [self _imageRectForFrame:frame];

    do

    {

        if ([event type] == NSLeftMouseUp)

            break;

        NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];

        //  Convert position from pixels to percent

        float xPos = (point.x - NSMinX(imageRect)) / NSWidth(imageRect);

        float yPos = (point.y - NSMinY(imageRect)) / NSHeight(imageRect);

        //  Store the new position in the array controller's selection

        [[_stringsController selection] setValue:[NSValue valueWithPoint:NSMakePoint(xPos, yPos)] forKey:@"position"];

        //  We could only invalidate the rect of the selected string, but since the whole image is still going to be redrawn it doesn't matter

        [self setNeedsDisplay:YES];

    }

    while (event = [[self window] nextEventMatchingMask:(NSLeftMouseDraggedMask|NSLeftMouseUpMask)]);

    if (event)

        [[self window] discardEventsMatchingMask:NSAnyEventMask beforeEvent:event]; 

}

@end