像素编辑器的网格实现
在像素编辑器的开发中,确定实现适应颜色变化的网格结构的有效方法单击和拖动时至关重要。典型的方法是为每个单元格使用单独的 JButton,但这可能效率低下且麻烦。
带有图像缩放的网格
另一种解决方案涉及使用 drawImage()方法通过缩放鼠标坐标来创建大像素。该技术提供了一种简单而有效的方法来同时更改多个单元格的颜色,如下所示:
<code class="java">import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Point; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.image.BufferedImage; import javax.swing.Icon; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.UIManager; /** @see http://stackoverflow.com/questions/2900801 */ public class Grid extends JPanel implements MouseMotionListener { private final BufferedImage img; private int imgW, imgH, paneW, paneH; public Grid(String name) { super(true); Icon icon = UIManager.getIcon(name); imgW = icon.getIconWidth(); imgH = icon.getIconHeight(); this.setPreferredSize(new Dimension(imgW * 10, imgH * 10)); img = new BufferedImage(imgW, imgH, BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = (Graphics2D) img.getGraphics(); icon.paintIcon(null, g2d, 0, 0); g2d.dispose(); this.addMouseMotionListener(this); } @Override protected void paintComponent(Graphics g) { paneW = this.getWidth(); paneH = this.getHeight(); g.drawImage(img, 0, 0, paneW, paneH, null); } @Override public void mouseMoved(MouseEvent e) { Point p = e.getPoint(); int x = p.x * imgW / paneW; int y = p.y * imgH / paneH; int c = img.getRGB(x, y); this.setToolTipText(x + "," + y + ": " + String.format("%08X", c)); } @Override public void mouseDragged(MouseEvent e) { } private static void create() { JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new Grid("Tree.closedIcon")); f.pack(); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { create(); } }); } }</code>
通过利用此技术,您可以有效地实现具有可调整颜色属性的可定制网格系统,满足像素编辑器应用程序的要求。
以上是如何使用'drawImage()”方法实现像素编辑器的网格结构?的详细内容。更多信息请关注PHP中文网其他相关文章!