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Java Class File  |  1999-07-15  |  1.2 KB  |  36 lines
  1. package javax.swing.plaf.basic;
  2.  
  3. import java.awt.Dimension;
  4. import java.awt.Rectangle;
  5. import java.awt.event.ActionEvent;
  6. import java.awt.event.ActionListener;
  7. import javax.swing.JComponent;
  8.  
  9. class BasicTreeUI$ScrollAction implements ActionListener {
  10.    private JComponent component;
  11.    private int direction;
  12.    private int amount;
  13.  
  14.    public BasicTreeUI$ScrollAction(JComponent var1, int var2, int var3) {
  15.       this.component = var1;
  16.       this.direction = var2;
  17.       this.amount = var3;
  18.    }
  19.  
  20.    public void actionPerformed(ActionEvent var1) {
  21.       Rectangle var2 = this.component.getVisibleRect();
  22.       Dimension var3 = this.component.getSize();
  23.       if (this.direction == 0) {
  24.          var2.x += this.amount;
  25.          var2.x = Math.max(0, var2.x);
  26.          var2.x = Math.min(Math.max(0, var3.width - var2.width), var2.x);
  27.       } else {
  28.          var2.y += this.amount;
  29.          var2.y = Math.max(0, var2.y);
  30.          var2.y = Math.min(Math.max(0, var3.width - var2.height), var2.y);
  31.       }
  32.  
  33.       this.component.scrollRectToVisible(var2);
  34.    }
  35. }
  36.