#include "ImageSelectorWin.h"
#include "jed.h"
#include <stdio.h>
#include <string.h>
#include <iostream.h>

ImageSelectorWin::ImageSelectorWin()
{
  xselection=50;
  yselection=50;
  xselectionsize=5;
  yselectionsize=5;
}
 
ImageSelectorWin::~ImageSelectorWin()
{
}

void ImageSelectorWin::mouse(int button, int state, int x, int y)
{
  if (button==GLUT_MIDDLE_BUTTON && state == GLUT_DOWN)
    {
      //puts ("middle down");
      xselection=x;
      yselection=y;
      xselectionsize=yselectionsize=0;
      glutPostRedisplay();
    }
  motion(x,y);
}

void ImageSelectorWin::motion(int x, int y)
{
  
  if (leftbuttonstate==GLUT_DOWN)
    {
      if (x<xselectionsize) x=xselectionsize;
      if (x+xselectionsize>width-1) x=width-1-xselectionsize;
      if (y<yselectionsize) y=yselectionsize;
      if (y+yselectionsize>height-1) y=height-1-yselectionsize;
      xselection=x;
      yselection=y;
      glutPostRedisplay();
    }
  else if (middlebuttonstate==GLUT_DOWN)
    {
      //puts ("midddle motion");
      xselectionsize = yselectionsize = MAX(0,MAX(x-xselection,y-yselection));
      if (xselectionsize>((MIN(width,height))/2)-1)
      	xselectionsize=yselectionsize=((MIN(width,height))/2)-1;
      //if (xselectionsize>20)
      //	xselectionsize=yselectionsize=20;
     
      if (xselection<xselectionsize) xselection=xselectionsize;
      if (xselection+xselectionsize>width-1) xselection=width-1-xselectionsize;
      if (yselection<yselectionsize) yselection=yselectionsize;
      if (yselection+yselectionsize>height-1) yselection=height-1-yselectionsize;
      glutPostRedisplay();
    }


}

void ImageSelectorWin::display()
{
  // Use ImageWin to draw picture
  ImageWin::display();

  // Turn on stippling
  glEnable(GL_LINE_STIPPLE);

  // modified y
  int mody = height-1-yselection;

  // draw
  for (int stip=0; stip<2; stip++)
    {
      // Set first white then black stipple
      if (stip==0)
	{
	  glColor3f(1,1,1);
	  glLineStipple(3,0x5555);
	}
      else
	{
	  glColor3f(0,0,0);
	  glLineStipple(3,0xAAAA);
	}
      
      // Draw crosshairs
      glBegin(GL_LINES);
      glVertex2s(xselection,0);
      glVertex2s(xselection,height);
      glVertex2s(0,mody);
      glVertex2s(width, mody);
      glEnd();
  
      // Draw box
      glBegin(GL_LINES);
      glVertex2s(xselection-xselectionsize,mody-yselectionsize);
      glVertex2s(xselection+xselectionsize,mody-yselectionsize);

      glVertex2s(xselection+xselectionsize,mody-yselectionsize);
      glVertex2s(xselection+xselectionsize,mody+yselectionsize);

      glVertex2s(xselection+xselectionsize,mody+yselectionsize);
      glVertex2s(xselection-xselectionsize,mody+yselectionsize);

      glVertex2s(xselection-xselectionsize,mody+yselectionsize);
      glVertex2s(xselection-xselectionsize,mody-yselectionsize);
      glEnd();
    }

  glutSwapBuffers(); 
}