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/Listing2906.java | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Master/Reference Architectures and Patterns/hjp5/examples/Listing2906.java')
| -rw-r--r-- | Master/Reference Architectures and Patterns/hjp5/examples/Listing2906.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing2906.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2906.java new file mode 100644 index 0000000..77375f9 --- /dev/null +++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2906.java @@ -0,0 +1,109 @@ +/* Listing2906.java */
+
+import java.awt.*;
+import java.awt.event.*;
+
+public class Listing2906
+extends Frame
+implements KeyListener
+{
+ String msg1 = "";
+ String msg2 = "";
+
+ public static void main(String[] args)
+ {
+ Listing2906 wnd = new Listing2906();
+ }
+
+ public Listing2906()
+ {
+ super("Tastaturereignisse");
+ addKeyListener(this);
+ addWindowListener(new WindowClosingAdapter(true));
+ setBackground(Color.lightGray);
+ setSize(300,200);
+ setLocation(200,100);
+ setVisible(true);
+ }
+
+ public void paint(Graphics g)
+ {
+ if (msg1.length() > 0) {
+ draw3DRect(g,20,50,250,30);
+ g.setColor(Color.black);
+ g.drawString(msg1,30,70);
+ }
+ if (msg2.length() > 0) {
+ draw3DRect(g,20,100,250,30);
+ g.setColor(Color.black);
+ g.drawString(msg2,30,120);
+ }
+ }
+
+ void draw3DRect(Graphics g,int x,int y,int width,int height)
+ {
+ g.setColor(Color.darkGray);
+ g.drawLine(x,y,x,y+height);
+ g.drawLine(x,y,x+width,y);
+ g.setColor(Color.white);
+ g.drawLine(x+width,y+height,x,y+height);
+ g.drawLine(x+width,y+height,x+width,y);
+ }
+
+ public void keyPressed(KeyEvent event)
+ {
+ msg1 = "";
+ System.out.println(
+ "key pressed: " +
+ "key char = " + event.getKeyChar() + " " +
+ "key code = " + event.getKeyCode()
+ );
+ if (event.getKeyChar() == KeyEvent.CHAR_UNDEFINED) {
+ int key = event.getKeyCode();
+ //Funktionstaste abfragen
+ if (key == KeyEvent.VK_F1) {
+ msg1 = "F1";
+ } else if (key == KeyEvent.VK_F2) {
+ msg1 = "F2";
+ } else if (key == KeyEvent.VK_F3) {
+ msg1 = "F3";
+ }
+ //Modifier abfragen
+ if (msg1.length() > 0) {
+ if (event.isAltDown()) {
+ msg1 = "ALT + " + msg1;
+ }
+ if (event.isControlDown()) {
+ msg1 = "STRG + " + msg1;
+ }
+ if (event.isShiftDown()) {
+ msg1 = "UMSCHALT + " + msg1;
+ }
+ }
+ }
+ repaint();
+ }
+
+ public void keyReleased(KeyEvent event)
+ {
+ System.out.println("key released");
+ msg1 = "";
+ repaint();
+ }
+
+ public void keyTyped(KeyEvent event)
+ {
+ char key = event.getKeyChar();
+ System.out.println("key typed: " + key);
+ if (key == KeyEvent.VK_BACK_SPACE) {
+ if (msg2.length() > 0) {
+ msg2 = msg2.substring(0,msg2.length() - 1);
+ }
+ } else if (key >= KeyEvent.VK_SPACE) {
+ if (msg2.length() < 40) {
+ msg2 += event.getKeyChar();
+ }
+ }
+ repaint();
+ }
+}
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