/** Resets the program to its initial state. */
public void reset() {
frame.clearDrawables(); // removes drawables added by the user
control.setValue("xleft", 3); // sets default input values
control.setValue("ytop", 3);
control.setValue("width", 1.0);
control.setValue("height", 1.5);
}
/** Creates a rectangle and adds it to the DisplayFrame. */
public void calculate() {
// gets rectangle location
double left = control.getDouble("xleft");
double top = control.getDouble("ytop");
// gets rectangle dimensions
double width = control.getDouble("width");
double height = control.getDouble("height");
Drawable rectangle = new WorldRectangle(left, top, width, height);
frame.addDrawable(rectangle);
// frame is automatically rendered after Calculate button is pressed
}
/** Constructs the DrawingApp and sets the world coordinate scale. */
public DrawingWorldApp() {
frame.setPreferredMinMax(0, 10, 0, 10);
}
