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by Lorenzo Bettini, bettini@gnu.org
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<title>/home/jia/Books/Java-Examples-2ed/src/Chapter09/draw3/KeyboardDrawingCanvas.java</title>
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<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> java.util.EventListener;
<b><font color=#0000FF>import</font></b> draw1.*;

<b><font color=#0000FF>public</font></b> <b><font color=#0000FF>class</font></b> KeyboardDrawingCanvas <b><font color=#0000FF>extends</font></b> DrawingCanvas { 

  <b><font color=#0000FF>public</font></b> KeyboardDrawingCanvas() {
    addKeyListener((KeyListener) listener); 
    font = <b><font color=#0000FF>new</font></b> Font(fontFamily, fontStyle, fontSize); 
  }

  <b><font color=#0000FF>public</font></b> Font getFont() { 
    <b><font color=#0000FF>return</font></b> font; 
  }

  <b><font color=#0000FF>public</font></b> String getFontFamily() { 
    <b><font color=#0000FF>return</font></b> fontFamily;
  }

  <b><font color=#0000FF>public</font></b> <font color=#009900>void</font> setFontFamily(String fontFamily) { 
    <b><font color=#0000FF>if</font></b> (fontFamily != <b><font color=#0000FF>null</font></b> &amp;&amp; 
	!fontFamily.equals(<b><font color=#0000FF>this</font></b>.fontFamily)) { 
      <b><font color=#0000FF>this</font></b>.fontFamily =fontFamily;
      font = <b><font color=#0000FF>new</font></b> Font(fontFamily, fontStyle, fontSize);
    }
  }

  <b><font color=#0000FF>public</font></b> <font color=#009900>int</font> getFontSize() { 
    <b><font color=#0000FF>return</font></b> fontSize;
  }

  <b><font color=#0000FF>public</font></b> <font color=#009900>void</font> setFontSize(<font color=#009900>int</font> fontSize) { 
    <b><font color=#0000FF>if</font></b> (fontSize &gt; <font color=#993399>0</font> &amp;&amp; 
	fontSize != <b><font color=#0000FF>this</font></b>.fontSize) { 
      <b><font color=#0000FF>this</font></b>.fontSize = fontSize;
      font = <b><font color=#0000FF>new</font></b> Font(fontFamily, fontStyle, fontSize);
    }
  }

  <b><font color=#0000FF>public</font></b> <font color=#009900>int</font> getFontStyle() {
    <b><font color=#0000FF>return</font></b> fontStyle;
  }

  <b><font color=#0000FF>public</font></b> <font color=#009900>void</font> setFontStyle(<font color=#009900>int</font> fontStyle) {
    <b><font color=#0000FF>if</font></b> (fontStyle != <b><font color=#0000FF>this</font></b>.fontStyle) { 
      <b><font color=#0000FF>this</font></b>.fontStyle = fontStyle;
      font = <b><font color=#0000FF>new</font></b> Font(fontFamily, fontStyle, fontSize);
    }
  }

  <i><font color=#9A1900>// necessary for keyboard input 
</font></i>  <i><font color=#9A1900>// public boolean isFocusTraversable() { // pre 1.4
</font></i>  <b><font color=#0000FF>public</font></b> <font color=#009900>boolean</font> isFocusable() { <i><font color=#9A1900>// 1.4
</font></i>    <b><font color=#0000FF>return</font></b> true; 
  }

  <i><font color=#9A1900>// factory method 
</font></i>  <b><font color=#0000FF>protected</font></b> EventListener makeCanvasListener() {
    <b><font color=#0000FF>return</font></b> (drawingCanvasListener = <b><font color=#0000FF>new</font></b> KeyboardDrawingCanvasListener(<b><font color=#0000FF>this</font></b>)); 
  }
 
  <b><font color=#0000FF>protected</font></b> String fontFamily = <font color=#FF0000>"Serif"</font>;
  <b><font color=#0000FF>protected</font></b> <font color=#009900>int</font> fontSize = <font color=#993399>24</font>; 
  <b><font color=#0000FF>protected</font></b> <font color=#009900>int</font> fontStyle = Font.PLAIN;
  <b><font color=#0000FF>protected</font></b> Font font; 

}
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