SliderControlPaintLine.java Source code

Introduction

Here is the source code for SliderControlPaintLine.java

Source

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.geom.Line2D;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class SliderControlPaintLine extends JFrame {
    DrawingCanvas canvas = new DrawingCanvas();

    JSlider slider1, slider2, slider3, slider4, slider5, slider6, slider7, slider8;

    double transX = 0.0;

    double transY = 0.0;

    double rotateTheta = 0.0;

    double rotateX = 150.0;

    double rotateY = 150.0;

    double scaleX = 1.0;

    double scaleY = 1.0;

    float width = 1.0f;

    public SliderControlPaintLine() {
        JPanel controlPanel = new JPanel();
        controlPanel.setLayout(new GridLayout(3, 3));
        getContentPane().add(controlPanel, BorderLayout.NORTH);

        JLabel label1 = new JLabel("Translate(dx,dy): ");
        JLabel label2 = new JLabel("Rotate(Theta,ox,oy): ");
        JLabel label3 = new JLabel("Scale(sx,sy)x10E-2:");

        controlPanel.add(label1);

        slider1 = createSlider(controlPanel, JSlider.HORIZONTAL, 0, 300, 150, 100, 50);
        slider2 = createSlider(controlPanel, JSlider.HORIZONTAL, 0, 300, 150, 100, 50);

        controlPanel.add(label2);

        slider3 = createSlider(controlPanel, JSlider.HORIZONTAL, 0, 360, 0, 90, 45);

        JPanel subPanel = new JPanel();
        subPanel.setLayout(new GridLayout(1, 2));

        slider4 = createSlider(subPanel, JSlider.HORIZONTAL, 0, 300, 150, 150, 50);
        slider5 = createSlider(subPanel, JSlider.HORIZONTAL, 0, 300, 150, 150, 50);
        controlPanel.add(subPanel);

        controlPanel.add(label3);

        slider6 = createSlider(controlPanel, JSlider.HORIZONTAL, 0, 200, 100, 100, 10);
        slider7 = createSlider(controlPanel, JSlider.HORIZONTAL, 0, 200, 100, 100, 10);

        JPanel widthPanel = new JPanel();
        JLabel label4 = new JLabel("Width Control:", JLabel.RIGHT);
        slider8 = createSlider(widthPanel, JSlider.HORIZONTAL, 0, 200, 100, 100, 10);
        slider8.addChangeListener(new SliderListener());

        widthPanel.setLayout(new GridLayout(1, 2));
        widthPanel.add(label4);
        widthPanel.add(slider8);
        getContentPane().add(widthPanel, BorderLayout.SOUTH);

        getContentPane().add(canvas);

        setSize(500, 500);
        setVisible(true);
    }

    public static void main(String arg[]) {
        new SliderControlPaintLine();
    }

    public JSlider createSlider(JPanel panel, int orientation, int minimumValue, int maximumValue, int initValue,
            int majorTickSpacing, int minorTickSpacing) {
        JSlider slider = new JSlider(orientation, minimumValue, maximumValue, initValue);
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(majorTickSpacing);
        slider.setMinorTickSpacing(minorTickSpacing);
        slider.setPaintLabels(true);
        slider.addChangeListener(new SliderListener());
        panel.add(slider);
        return slider;
    }

    class SliderListener implements ChangeListener {
        public void stateChanged(ChangeEvent e) {
            JSlider tempSlider = (JSlider) e.getSource();

            if (tempSlider.equals(slider1)) {
                transX = slider1.getValue() - 150.0;
                canvas.repaint();
            } else if (tempSlider.equals(slider2)) {
                transY = slider2.getValue() - 150.0;
                canvas.repaint();
            } else if (tempSlider.equals(slider3)) {
                rotateTheta = slider3.getValue() * Math.PI / 180;
                canvas.repaint();
            } else if (tempSlider.equals(slider4)) {
                rotateX = slider4.getValue();
                canvas.repaint();
            } else if (tempSlider.equals(slider5)) {
                rotateY = slider5.getValue();
                canvas.repaint();
            } else if (tempSlider.equals(slider6)) {
                if (slider6.getValue() != 0.0) {
                    scaleX = slider6.getValue() / 100.0;
                    canvas.repaint();
                }
            } else if (tempSlider.equals(slider7)) {
                if (slider7.getValue() != 0.0) {
                    scaleY = slider7.getValue() / 100.0;
                    canvas.repaint();
                }
            } else if (tempSlider.equals(slider8)) {
                width = slider8.getValue();
                canvas.repaint();
            }
        }
    }

    class DrawingCanvas extends Canvas {
        public DrawingCanvas() {
            setSize(300, 300);
        }

        public void paint(Graphics g) {
            Graphics2D g2D = (Graphics2D) g;

            g2D.translate(transX, transY);
            g2D.rotate(rotateTheta, rotateX, rotateY);
            g2D.scale(scaleX, scaleY);
            BasicStroke stroke = new BasicStroke(width);
            g2D.setStroke(stroke);
            Line2D line1 = new Line2D.Float(100f, 200f, 200f, 200f);
            g2D.draw(line1);
        }
    }
}