/*
*
      
_______
                       
_____
   
_____ _____
  

*
     
|__
   
__|
                     
|
  
__ \ / ____|__ \
 

*
        
| | __ _ _ __ ___
  
______| || | (___ | |__) |
*
        
| |/ _` | '__/ __|/ _ \/ __| |
  
| |\___ \|___/
 

*
        
| | (_| | |
  
\__ \ (_) \__ \ |__| |____) | |
     

*
        
|_|\__,_|_|
  
|___/\___/|___/_____/|_____/|_|
     

*
                                                         

* -------------------------------------------------------------
*
* TarsosDSP is developed by Joren Six at IPEM, University Ghent
*
  

* -------------------------------------------------------------
*
*
  
Info:
 
http://0110.be/tag/TarsosDSP
*
  
Github:
 
https://github.com/JorenSix/TarsosDSP
*
  
Releases:
 
http://0110.be/releases/TarsosDSP/
*
  

*
  
TarsosDSP includes modified source code by various authors,
*
  
for credits and info, see README.
*
 

*/

package be.tarsos.dsp.ui.layers;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Point2D;

import javax.swing.SwingUtilities;

import be.tarsos.dsp.ui.CoordinateSystem;
import be.tarsos.dsp.ui.LinkedPanel;


/**
 
* Draws the current selection.
 
*/
public class SelectionLayer extends MouseAdapter implements Layer{
	

	
private final CoordinateSystem cs;
	
private final Color color;

	
public SelectionLayer(final CoordinateSystem cs){
		
this(cs,Color.ORANGE);
	
}
	

	
public SelectionLayer(final CoordinateSystem cs, Color color){
		
this.cs=cs;
		
this.color = color;
	
}
		

	


	
@Override
	
public void draw(Graphics2D graphics) {
		
double startX,startY,endX,endY;
		
startX = cs.getStartX();
		
startY = cs.getStartY();
		
endX = cs.getEndX();
		
endY = cs.getEndY();
		

		
if(startX != Double.MAX_VALUE){
			
if(startX>endX){
				
double temp = startX;
				
startX = endX;
				
endX = temp;
			
}
			
if(startY>endY){
				
double temp = startY;
				
startY = endY;
				
endY = temp;
			
}
			
int x = (int) Math.round(startX);
			
int y = (int) Math.round(startY);
			
int width = ((int) Math.round(endX)) - x;
			
int height = ((int) Math.round(endY)) - y;
			

			
graphics.setColor(color);
			
graphics.drawRect(x, y, width, height);
		
}
	
}

	
@Override
	
public String getName() {
		
return "Selection Layer";
	
}

	
@Override
	
public void mouseDragged(MouseEvent e) {
		
if(SwingUtilities.isLeftMouseButton(e)){
			
LinkedPanel panel = (LinkedPanel) e.getComponent();
			
Graphics2D graphics = (Graphics2D) panel.getGraphics();
			
graphics.setTransform(panel.getTransform());
			
Point2D units = LayerUtilities.pixelsToUnits(graphics,e.getX(), (int) e.getY());
			
if(!panel.getCoordinateSystem().hasStartPoint()){
				
panel.getCoordinateSystem().setStartPoint(units.getX(), units.getY());
			
} else {
				
panel.getCoordinateSystem().setEndPoint(units.getX(), units.getY());
			
}
			
panel.repaint();
		
}
	
}

	
@Override
	
public void mouseReleased(MouseEvent e) {
		
if(SwingUtilities.isLeftMouseButton(e)){
			
LinkedPanel panel = (LinkedPanel) e.getComponent();
			
panel.getViewPort().zoomToSelection();
			
panel.invalidate();
		
}
		

	
}
}