corejava第10版

corejava第10版/v2ch11/renderQuality/RenderQualityTestFrame.java

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+package renderQuality;
+
+import java.awt.*;
+import java.awt.geom.*;
+
+import javax.swing.*;
+
+/**
+ * This frame contains buttons to set rendering hints and an image that is drawn with the selected
+ * hints.
+ */
+public class RenderQualityTestFrame extends JFrame
+{
+   private RenderQualityComponent canvas;
+   private JPanel buttonBox;
+   private RenderingHints hints;
+   private int r;
+
+   public RenderQualityTestFrame()
+   {
+      buttonBox = new JPanel();
+      buttonBox.setLayout(new GridBagLayout());
+      hints = new RenderingHints(null);
+
+      makeButtons("KEY_ANTIALIASING", "VALUE_ANTIALIAS_OFF", "VALUE_ANTIALIAS_ON");
+      makeButtons("KEY_TEXT_ANTIALIASING", "VALUE_TEXT_ANTIALIAS_OFF", "VALUE_TEXT_ANTIALIAS_ON");
+      makeButtons("KEY_FRACTIONALMETRICS", "VALUE_FRACTIONALMETRICS_OFF",
+            "VALUE_FRACTIONALMETRICS_ON");
+      makeButtons("KEY_RENDERING", "VALUE_RENDER_SPEED", "VALUE_RENDER_QUALITY");
+      makeButtons("KEY_STROKE_CONTROL", "VALUE_STROKE_PURE", "VALUE_STROKE_NORMALIZE");
+      canvas = new RenderQualityComponent();
+      canvas.setRenderingHints(hints);
+
+      add(canvas, BorderLayout.CENTER);
+      add(buttonBox, BorderLayout.NORTH);
+      pack();
+   }
+
+   /**
+    * Makes a set of buttons for a rendering hint key and values.
+    * @param key the key name
+    * @param value1 the name of the first value for the key
+    * @param value2 the name of the second value for the key
+    */
+   void makeButtons(String key, String value1, String value2)
+   {
+      try
+      {
+         final RenderingHints.Key k = 
+            (RenderingHints.Key) RenderingHints.class.getField(key).get(null);
+         final Object v1 = RenderingHints.class.getField(value1).get(null);
+         final Object v2 = RenderingHints.class.getField(value2).get(null);
+         JLabel label = new JLabel(key);
+
+         buttonBox.add(label, new GBC(0, r).setAnchor(GBC.WEST));
+         ButtonGroup group = new ButtonGroup();
+         JRadioButton b1 = new JRadioButton(value1, true);
+
+         buttonBox.add(b1, new GBC(1, r).setAnchor(GBC.WEST));
+         group.add(b1);
+         b1.addActionListener(event ->
+            {
+               hints.put(k, v1);
+               canvas.setRenderingHints(hints);
+            });
+         JRadioButton b2 = new JRadioButton(value2, false);
+
+         buttonBox.add(b2, new GBC(2, r).setAnchor(GBC.WEST));
+         group.add(b2);
+         b2.addActionListener(event ->
+            {
+               hints.put(k, v2);
+               canvas.setRenderingHints(hints);
+            });
+         hints.put(k, v1);
+         r++;
+      }
+      catch (Exception e)
+      {
+         e.printStackTrace();
+      }
+   }
+}
+
+/**
+ * This component produces a drawing that shows the effect of rendering hints.
+ */
+class RenderQualityComponent extends JComponent
+{
+   private static final Dimension PREFERRED_SIZE = new Dimension(750, 150);
+   private RenderingHints hints = new RenderingHints(null);
+   private Image image;
+
+   public RenderQualityComponent()
+   {
+      image = new ImageIcon(getClass().getResource("face.gif")).getImage();      
+   }
+
+   public void paintComponent(Graphics g)
+   {
+      Graphics2D g2 = (Graphics2D) g;
+      g2.setRenderingHints(hints);
+
+      g2.draw(new Ellipse2D.Double(10, 10, 60, 50));
+      g2.setFont(new Font("Serif", Font.ITALIC, 40));
+      g2.drawString("Hello", 75, 50);
+
+      g2.draw(new Rectangle2D.Double(200, 10, 40, 40));
+      g2.draw(new Line2D.Double(201, 11, 239, 49));
+      
+      g2.drawImage(image, 250, 10, 100, 100, null);
+   }
+   
+   /**
+    * Sets the hints and repaints.
+    * @param h the rendering hints
+    */
+   public void setRenderingHints(RenderingHints h)
+   {
+      hints = h;
+      repaint();
+   }
+   
+   public Dimension getPreferredSize() { return PREFERRED_SIZE; }
+}