diff options
| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java')
| -rw-r--r-- | Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java new file mode 100644 index 0000000..5bea4ee --- /dev/null +++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2904.java @@ -0,0 +1,92 @@ +/* Listing2904.java */
+
+import java.awt.*;
+import java.awt.event.*;
+import java.util.*;
+
+public class Listing2904
+extends Frame
+{
+ private Vector drawlist;
+ private Rectangle actrect;
+
+ public static void main(String[] args)
+ {
+ Listing2904 wnd = new Listing2904();
+ wnd.setLocation(200,200);
+ wnd.setSize(400,300);
+ wnd.setVisible(true);
+ }
+
+ public Listing2904()
+ {
+ super("Rechtecke zeichnen");
+ drawlist = new Vector();
+ actrect = new Rectangle(0,0,0,0);
+ addWindowListener(new MyWindowListener());
+ addMouseListener(new MyMouseListener());
+ addMouseMotionListener(new MyMouseMotionListener());
+ }
+
+ public void paint(Graphics g)
+ {
+ Rectangle r;
+ Enumeration e;
+
+ for (e = drawlist.elements(); e.hasMoreElements(); ) {
+ r = (Rectangle)e.nextElement();
+ g.drawRect(r.x, r.y, r.width, r.height);
+ }
+ if (actrect.x > 0 || actrect.y > 0) {
+ g.drawRect(
+ actrect.x,
+ actrect.y,
+ actrect.width,
+ actrect.height
+ );
+ }
+ }
+
+ class MyMouseListener
+ extends MouseAdapter
+ {
+ public void mousePressed(MouseEvent event)
+ {
+ actrect = new Rectangle(event.getX(),event.getY(),0,0);
+ }
+
+ public void mouseReleased(MouseEvent event)
+ {
+ if (actrect.width > 0 || actrect.height > 0) {
+ drawlist.addElement(actrect);
+ }
+ repaint();
+ }
+ }
+
+ class MyMouseMotionListener
+ extends MouseMotionAdapter
+ {
+ public void mouseDragged(MouseEvent event)
+ {
+ int x = event.getX();
+ int y = event.getY();
+ if (x > actrect.x && y > actrect.y) {
+ actrect.width = x - actrect.x;
+ actrect.height = y - actrect.y;
+ }
+ repaint();
+ }
+ }
+
+ class MyWindowListener
+ extends WindowAdapter
+ {
+ public void windowClosing(WindowEvent event)
+ {
+ setVisible(false);
+ dispose();
+ System.exit(0);
+ }
+ }
+}
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