可调整角度
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我在框架中有一个角度（我用两条线画出了它）。我想使其框架灵活；我的意思是，当用户扩大框架角度时，框架角度也会扩大，反之亦然。我尝试了很多示例，但无法解决。有人可以帮忙吗？
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
public class LineDraw extends Frame {
Line2D line1 = new Line2D.Double(200, 200, 100, 300);
Stroke drawingStroke1 = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0,
new float[] { 9 }, 0);
Line2D line2 = new Line2D.Double(200, 200, 200, 300);
public void paint(Graphics g) {
Graphics2D graph = (Graphics2D) g;
graph.setPaint(Color.red);
graph.draw(line2);
graph.setStroke(drawingStroke1);
graph.setPaint(Color.green);
graph.draw(line1);
}
public static void main(String args[]) {
Frame frame = new LineDraw();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
frame.setSize(300, 250);
frame.setVisible(true);
}
}
没有找到相关结果
已邀请:
2 个回复
俺呵誓放胳
import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.awt.geom.*; public class LineDrawSwing extends JLabel implements Icon { Line2D line1, line2; public LineDrawSwing() { this.setIcon(this); } Stroke drawingStroke1 = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[] { 9 }, 0); public static void main(String args[]) { JFrame frame = new JFrame(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent we) { System.exit(0); } }); frame.add(new LineDrawSwing()); frame.validate(); frame.setSize(300, 250); frame.setVisible(true); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { Dimension size = getSize(); line1 = new Line2D.Double(size.width/2, size.height-10, 10, 10); line2 = new Line2D.Double(size.width/2, size.height-10, size.width-10, 10); Graphics2D graph = (Graphics2D) g; graph.setPaint(Color.red); graph.draw(line2); graph.setStroke(drawingStroke1); graph.setPaint(Color.green); graph.draw(line1); } @Override public int getIconHeight() { return getSize().height; } @Override public int getIconWidth() { return getSize().width; } }炬卤遁蝎变
上下文中创建/更新行，但这并不是一个很干净的实现，它包含许多隐含的逻辑和假设，因此可能还存在一些问题。 这就是ComponentListener方法。由于您不清楚这一点，因此我不得不对您希望从哪里绘制线条的一些假设。 （如果您对此更加清楚，我可以更新示例。）import java.awt.*; import java.awt.event.*; import java.awt.geom.*; public class LineDraw extends Canvas implements ComponentListener { Line2D line1, line2; public LineDraw() { this.addComponentListener(this); } // set up lines every size update public void componentResized(ComponentEvent e) { Dimension size = getSize(); line1 = new Line2D.Double(size.width/2, size.height-10, 10, 10); line2 = new Line2D.Double(size.width/2, size.height-10, size.width-10, 10); } // required to satisfy ComponentListener interface public void componentHidden(ComponentEvent e) { } public void componentMoved(ComponentEvent e) { } public void componentShown(ComponentEvent e) { } // paint, main both as before Stroke drawingStroke1 = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[] { 9 }, 0); public void paint(Graphics g) { Graphics2D graph = (Graphics2D) g; graph.setPaint(Color.red); graph.draw(line2); graph.setStroke(drawingStroke1); graph.setPaint(Color.green); graph.draw(line1); } public static void main(String args[]) { Frame frame = new Frame(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent we) { System.exit(0); } }); frame.add(new LineDraw()); frame.validate(); frame.setSize(300, 250); frame.setVisible(true); } }