Initial Commit

2018-10-15 12:47:14 -06:00
commit 0c531ffff9
55 changed files with 7285 additions and 0 deletions
@@ -0,0 +1,78 @@
+/*  this class allows interactive
+    viewing of a tree built from
+    Node instances
+*/
+
+import java.awt.*;
+import java.awt.event.KeyEvent;
+
+public class TreeViewer extends Basic
+{
+  // instance variables for the application:
+  // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+ 
+  private Node root;     // root of tree to be viewed
+
+  private String keyInput;
+  private double horizGap = 2, vertGap = .5;
+
+  // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+  public TreeViewer( String title, int ulx, int uly, int pw, int ph,
+                     Node tree )
+  {
+    super(title,ulx,uly,pw,ph);
+
+    setBackgroundColor( new Color( 128, 128, 200 ) );
+  
+    // tree display
+    cameras.add( new Camera( 25, 45, pw-55, ph-75,
+                             0, 10, 0, 5,
+                             new Color( 200, 200, 200 )  ) );
+
+    root = tree;
+
+    super.start();
+  }
+
+  public void step()
+  {
+    // tree display
+    Camera cam = cameras.get(0);
+    cam.activate();
+    cam.setColor( Color.black );
+
+    root.draw( cam, 5.0, 4.0, horizGap, vertGap );
+
+  }// step
+
+  public void keyTyped( KeyEvent e ) {
+    char key = e.getKeyChar();
+    
+    if( key == 'w' ){
+      horizGap *= 1.2;
+    }
+    else if( key == 'n' ){
+      horizGap /= 1.2;
+    }
+
+  }// keyTyped
+
+  public void keyPressed( KeyEvent e ) {
+    int code = e.getKeyCode();
+
+    if( code == KeyEvent.VK_LEFT ){
+      cameras.get(0).shiftRegion( -0.25, 0 );
+    }
+    else if( code == KeyEvent.VK_RIGHT ){
+      cameras.get(0).shiftRegion( 0.25, 0 );
+    }
+    else if( code == KeyEvent.VK_UP ){
+      cameras.get(0).shiftRegion( 0, 0.25 );
+    }
+    else if( code == KeyEvent.VK_DOWN ){
+      cameras.get(0).shiftRegion( 0, -0.25 );
+    }
+  }// keyPressed
+
+}// TreeViewer