#import "TransformedImageController.h"

#import "TransformedImageView.h"

#import "NSImageGradients.h"

#import "NSAffineTransform_Shearing.h"

@implementation TransformedImageController

- (void) awakeFromNib

  {

  [self resetTransformations:nil];

  }

- (IBAction) resetTransformations: sender

  {

  [imageView setTransform:[NSAffineTransform transform]];

  scale = 1.0;

  rotation = xShear = yShear = 0;

  }

  // User/Filesystem interactions.

- (IBAction) openDocument: sender

  {

  [[NSOpenPanel openPanel]  // Get the shared open panel

    beginSheetForDirectory:NSHomeDirectory()    // Point it at the user's home

    file:nil

    modalForWindow:window  // This makes it show up as a sheet, attached to window

    modalDelegate:self      // Tell me when you're done.

    didEndSelector:@selector(openPanelDidEnd:returnCode:contextInfo:)  // Call this method when you're done..

    contextInfo:NULL];  

  }

- (void) openPanelDidEnd:(NSOpenPanel *)sheet returnCode:(int)returnCode contextInfo:(void  *)contextInfo

  {

  [imageView setImage:[[[NSImage alloc] initWithContentsOfFile:[sheet filename]]autorelease]];

  [self resetTransformations:nil];

  }

- (IBAction)saveDocument:(id)sender

  {

  [[NSSavePanel savePanel]

    beginSheetForDirectory:NSHomeDirectory()  // seems like a reasonable place to start..

    file:@"Transformed Image"   // default filename

    modalForWindow:window   //Run as a sheet, attached to "window"

    modalDelegate:self  // The save panel should call me when it's done..

    didEndSelector:@selector(savePanelDidEnd:returnCode:contextInfo:) // ... using this selector

    contextInfo:NULL];

  }

- (void) savePanelDidEnd:(NSSavePanel *)sheet returnCode:(int)returnCode contextInfo:(void  *)contextInfo

  {

  if (returnCode == NSOKButton)  // The user hit "save", so...

    [[[imageView transformedImage] TIFFRepresentation]  // Create the contents of a .tiff file

      writeToFile:[NSString stringWithFormat:@"%@.%@", [sheet filename], @"tiff"] // save it at the path we get from the panel.

      atomically:YES];  // That's about all there is to it..

  }

- (void) fixMatrix

  {

  NSAffineTransform 

    *transform = [NSAffineTransform transform];  // This comes to us set to the identity transform.

  [transform rotateByDegrees:rotation];  // Bend it to our will!

  [transform scaleBy:scale];

  [transform shearXBy:xShear yBy:yShear];

  [imageView setTransform: transform];  // And apply it to the image view.

  }

  // The actions..

- (IBAction) takeRotationFrom: sender  { rotation = [sender floatValue]; [self fixMatrix];}

- (IBAction) takeScaleFrom: sender { scale = [sender floatValue]; [self fixMatrix]; }

- (IBAction) takeXShearFrom: sender { xShear = [sender floatValue]; [self fixMatrix]; }

- (IBAction) takeYShearFrom: sender { yShear = [sender floatValue];[self fixMatrix]; }

- (IBAction) resetShear: sender { xShear = yShear = 0.0; [self fixMatrix]; }

- (IBAction) showTheGradient: sender { [imageView setImage:[NSImage prettyGradientImageForWWDCDemo]];}

 - (IBAction) imageViewRecievedImage: sender

  {

  [self resetTransformations:nil];

  [[imageView cell] setHighlighted:NO];

  }

@end

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