Class ShimAWT

core/src/processing/awt/ShimAWT.java:40–952

This class exists as an abstraction layer to remove AWT from PApplet. It is a staging area for AWT-specific code that's shared by the Java2D, JavaFX, and JOGL renderers. Once PSurfaceFX and PSurfaceJOGL have their own implementations, these methods will move to PSurfaceAWT.

 * their own implementations, these methods will move to PSurfaceAWT.
 */
public class ShimAWT implements PConstants {
  /*
  PGraphics graphics;
  PApplet sketch;


  public ShimAWT(PApplet sketch) {
    this.graphics = graphics;
    this.sketch = sketch;
  }
  */
  static private ShimAWT instance;

  final private GraphicsDevice[] displayDevices;

  final private int displayWidth;
  final private int displayHeight;


  /** Only needed for display functions */
  static private ShimAWT getInstance() {
    if (instance == null) {
      instance = new ShimAWT();
    }
    return instance;
  }


  private ShimAWT() {
    // Need the list of display devices to be queried already for usage below.
    // https://github.com/processing/processing/issues/3295
    // https://github.com/processing/processing/issues/3296
    // Not doing this from a static initializer because it may cause
    // PApplet to cache and the values to stick through subsequent runs.
    // Instead make it a runtime thing and a local variable.
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice device = ge.getDefaultScreenDevice();
    displayDevices = ge.getScreenDevices();

//    // Default or unparsed will be -1, spanning will be 0, actual displays will
//    // be numbered from 1 because it's too weird to say "display 0" in prefs.
//    if (display > 0 && display <= displayDevices.length) {
//      device = displayDevices[display-1];
//    }
    // When this was called, display will always be unset (even in 3.x),
    // since this happens before settings() is called.

    // Set displayWidth and displayHeight for people still using those.
    DisplayMode displayMode = device.getDisplayMode();
    displayWidth = displayMode.getWidth();
    displayHeight = displayMode.getHeight();
  }


  static public int getDisplayWidth() {
    return getInstance().displayWidth;
  }