📄 keyboarddrawingcanvaslistener_java.htm
字号:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="java2html 1.7
by Lorenzo Bettini, bettini@gnu.org
http://w3.newnet.it/bettini
http://www.gnu.org/software/java2html/java2html.html">
<title>/home/jia/Books/Java-Examples-2ed/src/Chapter09/draw3/KeyboardDrawingCanvasListener.java</title>
</head>
<body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink="#FF0000">
<pre>
<tt>
<b><font color=#0000FF>package</font></b> draw3;
<b><font color=#0000FF>import</font></b> java.awt.*;
<b><font color=#0000FF>import</font></b> java.awt.event.*;
<b><font color=#0000FF>import</font></b> draw1.*;
<b><font color=#0000FF>public</font></b> <b><font color=#0000FF>class</font></b> KeyboardDrawingCanvasListener <b><font color=#0000FF>extends</font></b> DrawingCanvasListener <b><font color=#0000FF>implements</font></b> KeyListener {
<b><font color=#0000FF>public</font></b> KeyboardDrawingCanvasListener(DrawingCanvas canvas) {
<b><font color=#0000FF>super</font></b>(canvas);
}
<b><font color=#0000FF>public</font></b> <font color=#009900>void</font> keyPressed(KeyEvent e) {
<b><font color=#0000FF>if</font></b> (tool <b><font color=#0000FF>instanceof</font></b> KeyboardTool) {
KeyboardTool keyboardTool = (KeyboardTool) tool;
keyboardTool.addCharToShape((<font color=#009900>char</font>) e.getKeyChar());
}
}
<b><font color=#0000FF>public</font></b> <font color=#009900>void</font> keyReleased(KeyEvent e) {}
<b><font color=#0000FF>public</font></b> <font color=#009900>void</font> keyTyped(KeyEvent e) {}
<b><font color=#0000FF>public</font></b> <font color=#009900>void</font> mouseClicked(MouseEvent e) {
canvas.requestFocus();
}
}
</tt>
</pre>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -