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CS1322/p6/Extra Credit/CalculatorGUI.java

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+/**
+ *  <PRE>
+ *  CalculatorGUI.java
+ *
+ *  Revisions: 1.1 Mar. 14, 2001
+ *               Added minor modifications to calculation behavior.  Added
+ *               some documentation.
+ *             1.0 Jan. 11, 2001
+ *               Created the CalculatorGUI class
+ *
+ *  </PRE>
+ *
+ *  @author <A HREF="mailto:demox@cc.gatech.edu">Luke A. Olbrish</A>
+ *  @version Version 1.0, Jan. 11, 2001
+ */
+
+// I must import java libraries in order to work with swing.
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+
+public class CalculatorGUI
+{
+  /**
+   *  The main frame of the program.  This will contain all of the other
+   *  gui components.
+   */
+  private JFrame guiFrame = null;
+
+  /**
+   *  This panel will be the only component directy added to the frame.
+   *  Instead, this panel will be where all other gui components will be added.
+   */
+  private Container contentPane = null;
+
+  /**
+   *  This label will be used as the display for the numbers of the calculator.
+   *  The label will be placed in the top of the contentPane.
+   */
+  private JLabel numberLabel = null;
+
+  /**
+   *  This panel is where the operator and digit buttons will be placed.  It
+   *  will be the main content of the contentPane.
+   */
+  private JPanel buttonPanel = null;
+
+  /**
+   *  This panel will contain the clear and equal buttons.  It will be in the
+   *  lower section of the content pane.
+   */
+  private JPanel operationPanel = null;
+
+  /**
+   *  This array, which will be of size 10.  It will hold 10 digit buttons.
+   */
+  private JButton[] numberedButtons = null;
+
+  /**
+   *  This array, which will be of size 6.  It will hold the operations.
+   */
+  private JButton[] operationButtons = null;
+
+  /**
+   *  This is the control for the program.  It will handle all events that
+   *  occur in this gui.
+   */
+  private EventHandler event = null;
+
+  // Constructors
+
+  public CalculatorGUI()
+  {
+    doMakeObjects();
+    doAddObjects();
+    doCustomizations();
+    doEventHandling();
+
+    // This sets the size of the screen based on the preferred size of the
+    // GUI components.
+    guiFrame.pack();
+    guiFrame.setVisible( true );
+  }// end of constructor()
+
+  // Constructor Helpers
+
+  /**
+   *  This function will create all of the components that are needed for the
+   *  gui.  It should initialize the guiFrame, contentPane, buttonPanel,
+   *  operationPanel, numberLabel, numberedButtons, and operationButtons.
+   *  You should also set your layouts here.
+   */
+  public void doMakeObjects()
+  {
+    // ### Add your code here. ####
+	guiFrame.getContentPane().setLayout(new BorderLayout());
+	
+    // ### Done ###
+  }// end of doMakeObjects()
+
+  /**
+   *  This function is where you should add the components.  You should add
+   *  the numberedButtons and +, -, *, / to buttonPanel.  Clr and = should
+   *  be added to operationPanel.  numberLabel should be added to the top of
+   *  the contentPane, buttonPanel to the center, and operationPanel to the
+   *  bottom.
+   */
+  public void doAddObjects()
+  {
+    guiFrame.setContentPane( contentPane );
+
+    // ### Add your code here. ####
+
+    // ### Done ###
+  }// end of doAddObjects()
+
+  /**
+   *  This is where you should set the background colors for the buttons.
+   *  You should also increase the label's font size and prevent all the
+   *  buttons from having their focus be painted.
+   */
+  public void doCustomizations()
+  {
+    // ### Add your code here. ####
+
+    // ### Done ###
+  }// end of doCustomizations()
+
+  public void doEventHandling()
+  {
+    // Add the event handler that will monitor events from this GUI.
+    event = new EventHandler( this );
+
+    // Make event respond to button presses on the numbers from the GUI.
+    for( int x = 0; x < 10; x++ )
+      numberedButtons[x].addActionListener( event );
+
+    // Make event respond to button presses on the other buttons from the
+    // GUI.
+    for( int x = 0; x < 6; x++ )
+      operationButtons[x].addActionListener( event );
+
+    // This is a specialized way of creating a class that will handle
+    // window frame events.  More on this in the next lab...
+    guiFrame.addWindowListener( new WindowAdapter()
+      {
+        public void windowClosing( WindowEvent we )
+        {
+          System.exit( 0 );
+        }// end of windowClosing( WindowEvent )
+      });// end of WindowAdapter inner class
+  }// end fo doEventHandling()
+
+  // Accessors
+
+  /**
+   *  This function should return the text from the numberLabel.
+   *
+   *  @return the contents of numberLabel.
+   */
+  public String getDisplay()
+  {
+    // ### Add your code here. ####
+    return numberLabel.getText();
+    // ### Done ###
+  }// end of getDisplay()
+
+  // Modifiers
+
+  /**
+   *  This function should set the text in numberLabel.
+   *
+   *  @param value the string to set as the text for numberLabel
+   */
+  public void setDisplay( String value )
+  {
+    // ### Add your code here. ####
+    numberLabel.setText(value);
+    // ### Done ###
+  }// end of setDisplay( String )
+
+  /**
+   *  The driver for the program.
+   *
+   *  @param args a String array of arguements.
+   */
+  public static void main( String[] args )
+  {
+    CalculatorGUI gui = new CalculatorGUI();
+  }// end of main( String[] )
+
+}// end of class CalculatorGUI