// Advanced if-else example from 2/20 class

// Global constants: current shape and properties
int RECTANGLE = 0;
int ELLIPSE = 1;
int WIDTH = 50;
int HEIGHT = 50;

// Global variables
int currentShape = RECTANGLE; // Start with rectangles
int currentStrokeWeight = 1;

void setup ()
{
  size (400, 400);
  background (150);
  ellipseMode(CENTER); // Center ellipses on mouse position
  strokeWeight(currentStrokeWeight);
  smooth();
}

void draw ()
{ }

void mousePressed ()
{
  // Use the value of currentShape to determine what
  // to draw this time around
  
  if (currentShape == 0)
  {
    rect (mouseX, mouseY, WIDTH, HEIGHT);
  }
  else // otherwise, draw an ellipse
  {
    ellipse(mouseX, mouseY, WIDTH, HEIGHT);
  }
}

void keyPressed ()
{
  // key is a system variable that holds the value of
 // the last key that was typed
  
  // If the user types 'c', clear the window
  // If the user types 'r', change shape to rectangle
  // If the user types 'e', change shape to ellipse
  // If the user types 'f', change the fill color
  // If the user types 's', change the stroke (line) color
  // If the user types 'w', change the stroke weight (width)
  //
  // Do nothing if the user hits any other key
  
  if (key == 'c')
  {
    // Clear the window
    background (150);
  }
  else if (key == 'r')
  {
    currentShape = 0;
  }
  else if (key == 'e')
  {
    currentShape = 1;
  }
  else if (key == 'f')
  {
    // Change fill to a random color
    fill(random(256), random(256), random(256));  
  }
  else if (key == 's')
  {
    // Change the stroke color to a random color
    stroke(random(256), random(256), random(256));  
  }
  else if (key == 'w')
  {
    // Increase the line weight by 2, but stay
    // within the range 0-16
    
    int newStrokeWeight = currentStrokeWeight + 2;
    currentStrokeWeight = newStrokeWeight % 17;
    strokeWeight(currentStrokeWeight);
  }

}