import sum.kern.*;

public abstract class Anwendung {
    // Objekte
    private Bildschirm canvas;
    private Maus mouse;
    private Tastatur keyboard;
    private Buntstift pen;

    // Variabeln
    private boolean eventState = false;
    private int mouseX = -1,
                mouseY = -1;

    public Anwendung(int width, int height, boolean doublebuffer) {
        this.canvas = new Bildschirm(width, height, doublebuffer);
        this.canvas.setAlwaysOnTop(true);
        this.mouse = new Maus();
        this.keyboard = new Tastatur();
        this.pen = new Buntstift();

        this.startEventLoop();
    }

    // Events
    abstract void mouseKlickEvent() {};
    abstract void mouseDoubleKlickEvent() {};
    abstract void mouseMoveEvent(int x, int y) {};
    abstract void keyboardEvent(char c) {};

    private void eventLoop() {
        // mouseLeft
        if(this.mouse.istGedrueckt()) {
            this.mouseKlickEvent();
        }

        // mouseDouble
        if(this.mouse.doppelKlick()) {
            this.mouseDoubleKlickEvent();
        }

        // mouseMove
        if(this.mouse.hPosition() != this.mouseX
        || this.mouse.vPosition() != this.mouseY) {
            this.mouseX = this.mouse.hPosition();
            this.mouseY = this.mouse.vPosition();
            this.mouseMoveEvent(this.mouseX, this.mouseY);
        }

        // keyboard
        if(this.keyboard.wurdeGedrueckt()) {
            this.keyboardEvent(this.keyboard.zeichen());
            this.keyboard.weiter();
        }
    }

    public void startEventLoop() {
        this.eventState = true;
        while(this.eventState) {
            this.eventLoop();
        }
    }
    public void stopEventLoop() {
        this.eventState = false;
    }
}