ImagePanel.java Source code

Introduction

Here is the source code for ImagePanel.java

Source

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;

import javax.swing.JPanel;

class ImagePanel extends JPanel {
    private double zoom = 1.0;

    private double percentage;

    private Image image;

    public ImagePanel(Image image, double zoomPercentage) {
        this.image = image;
        percentage = zoomPercentage / 100;
    }

    public void paintComponent(Graphics grp) {
        Graphics2D g2D = (Graphics2D) grp;
        g2D.scale(zoom, zoom);
        g2D.drawImage(image, 0, 0, this);
    }

    public void setZoomPercentage(int zoomPercentage) {
        percentage = ((double) zoomPercentage) / 100;
    }

    public void originalSize() {
        zoom = 1;
    }

    public void zoomIn() {
        zoom += percentage;
    }

    public void zoomOut() {
        zoom -= percentage;

        if (zoom < percentage) {
            if (percentage > 1.0) {
                zoom = 1.0;
            } else {
                zoomIn();
            }
        }
    }
}