// Copyright 2011 Palantir Technologies
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.palantir.ptoss.cinch.example.demo;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import javax.swing.JComponent;
import com.palantir.ptoss.cinch.core.Bindings;
import com.palantir.ptoss.cinch.core.CallOnUpdate;
import com.palantir.ptoss.cinch.example.demo.DrawingCanvasModel.Mode;
public class DrawingCanvas extends JComponent {
private static final long serialVersionUID = 1L;
private final DrawingCanvasModel model;
private final Bindings bindings = new Bindings();
public DrawingCanvas(DrawingCanvasModel model) {
this.model = model;
initializeListeners();
bindings.bind(this);
}
private void initializeListeners() {
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
processPoint(e);
}
});
addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
if (model.isAllowDrag()) {
processPoint(e);
}
}
});
}
private void processPoint(MouseEvent e) {
if (model.getMode() == Mode.POINT) {
model.addPoint(e.getPoint());
} else if (model.getMode() == Mode.LINE) {
if (model.getCursor() != null) {
model.addLine(new Line2D.Double(
model.getCursor().getX(), model.getCursor().getY(), e.getX(), e.getY()));
}
model.setCursor(e.getPoint());
}
}
@CallOnUpdate(model = "model")
@Override
public void repaint() {
super.repaint();
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setColor(Color.WHITE);
g2.fillRect(0, 0, getWidth(), getHeight());
g2.setColor(Color.BLACK);
for (Line2D line : model.getLines()) {
g2.draw(line);
}
for (Point2D point : model.getPoints()) {
g2.fillOval((int)point.getX(), (int)point.getY(), 5, 5);
}
}
}