// GraphicsWindowTest.cc

// test the graphics package

// (C) 2002 Bill Lenhart

#include "GraphicsWindow.h"

int main() {

  // Pink-Purple (255,0,255) in unsigned long format
  unsigned long aColorIndex = ((255*256)+0)*256+255;

  int x, y; // coordinates for a point
  char ch; // holds an input character
  // Create some windows
  GraphicsWindow window1(300,200); 
  GraphicsWindow window2(256,256);

  // Make them visible
  window1.Show();
  window2.Show();

  // Draw some pixels in default color of window
  window1.DrawPixel(int(0.33*x), int(0.33*y));
  window1.DrawPixel(int(0.66*x), int(0.66*y));
  // and a segment
  window1.DebugSegment(10,90,90,10);

  // Do the same in window2
  // Note: 2 different ways to draw in a given color
  window2.DrawPixel(30, 30, aColorIndex);
  window2.DrawPixel(170, 170, 255, 0, 255);
  // Now set window2 drawing color
  window2.SetForeground(aColorIndex);
  window2.DebugSegment(10,90,90,10);

  // Force graphics to appear on screen.  Why:
  // X is a complex network-savvy, client-server system
  window1.Flush();

  cout << "Enter any non-white char to continue: ";
  cin >> ch;
  window1.Erase();

  // Set window1 drawing color to yellow
  window1.SetForeground(255, 255, 0);
  // Draw a big X
  window1.BigX();

  window2.Flush();

  cout << "Enter any non-white char to continue: ";
  cin >> ch;
  window1.Erase();
  window2.Erase();

  cout << "Enter PenMode for window2: (c)opy, (i)gnore, x(or), (a)nd, (o)r: ";
  cin >> ch;

  // Set pen mode
  switch (ch) {
  case('i') :
    window2.SetPenMode(GraphicsWindow::IgnoreMode);
    break;
  case('x') :
    window2.SetPenMode(GraphicsWindow::XOrMode);
    break;
  case('a') :
    window2.SetPenMode(GraphicsWindow::AndMode);
    break;
  case('o') :
    window2.SetPenMode(GraphicsWindow::OrMode);
    break;
  case('c') :
  default: 
    window2.SetPenMode(GraphicsWindow::CopyMode);
    break;
  }

  // Repeatedly fill window using (R,G,B) intensity values
  // Outer loop slowly increases level of green
  // Inner loops control red (x direction) and blue (y direction)
  for(int green=0;green<256;green++) {
    cout << "Green level = " << green << endl;
    for(int blue=0;blue<256;blue++)
      for(int red=0;red<256;red++) {
	// Can use either integer (r,g,b) values
	window1.DrawPixel(red, blue, red, green, blue);
	// or floats
	window2.DrawPixel(red,blue,float(red/256.0), float(green/256.0),
			  float(blue/256.0));
      }
    // after each fill, force window update
    window2.Flush();
  }

  // Erase depends on mode: only does "true" erase in CopyMode
  window2.SetPenMode(GraphicsWindow::CopyMode);
  window2.Erase();

  // Draw a big X
  window2.BigX();
  window2.Flush();
  
  return(0);
}