mytextcontroller.java

高级java2 大学教程(含源码,经典的Java学习教程

// MyTextController.java
// MyTextController is a MyShapeController subclass for drawing
// MyText objects.
package com.deitel.advjhtp1.drawing.controller;

// Java core packages
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

// Deitel packages
import com.deitel.advjhtp1.drawing.model.*;
import com.deitel.advjhtp1.drawing.model.shapes.*;

public class MyTextController extends MyShapeController {  

   // MyTextController constructor
   public MyTextController( DrawingModel model, Class shapeClass )
   { 
      // invoke superclass constructor; always use MyText class
      super( model, MyText.class );
   }
   
   // start drawing MyText object
   public void startShape( int x, int y ) {

      // create MyText shape
      MyText currentText = new MyText();
      
      // set MyText's Point1
      currentText.setPoint1( x, y );
      
      // create TextInputPanel to get text and properties
      TextInputPanel inputPanel = new TextInputPanel();
      
      // display TextInputPanel in JOptionPane
      String text = JOptionPane.showInputDialog( null,
         inputPanel );

      // ensure provided text is not null or empty
      if ( text == null || text.equals( "" ) )
         return;
      
      // set MyText properties (bold, italic, etc.)
      currentText.setBoldSelected( 
         inputPanel.boldSelected() );
      
      currentText.setItalicSelected( 
         inputPanel.italicSelected() );
      
      currentText.setUnderlineSelected( 
         inputPanel.underlineSelected() );      
      
      currentText.setFontName( 
         inputPanel.getSelectedFontName() );
      
      currentText.setFontSize( 
         inputPanel.getSelectedFontSize() );
      
      currentText.setColor( getPrimaryColor() );
      
      // set MyText's text
      currentText.setText( text );    
      
      // add MyText object to model
      addShapeToModel( currentText );      
   }

   // modify shape currently being drawn
   public void modifyShape( int x, int y ) {}
   
   // finish drawing shape
   public void endShape( int x, int y ) {}
   
   // JPanel with components for inputting MyText properties
   private static class TextInputPanel extends JPanel {
      
      private JCheckBox boldCheckBox;
      private JCheckBox italicCheckBox;
      private JCheckBox underlineCheckBox;
      private JComboBox fontComboBox;
      private JComboBox fontSizeComboBox;   
      
      // TextInputPanel constructor
      public TextInputPanel()
      {
         boldCheckBox = new JCheckBox( "Bold" );
         italicCheckBox = new JCheckBox( "Italic" );
         underlineCheckBox = new JCheckBox( "Underline" );
         
         // create JComboBox for selecting Font
         fontComboBox = new JComboBox();
         fontComboBox.addItem( "SansSerif" );
         fontComboBox.addItem( "Serif" );
         
         // create JComboBox for selecting Font size
         fontSizeComboBox = new JComboBox();
         fontSizeComboBox.addItem( "10" );
         fontSizeComboBox.addItem( "12" );
         fontSizeComboBox.addItem( "14" );
         fontSizeComboBox.addItem( "18" );
         fontSizeComboBox.addItem( "22" );
         fontSizeComboBox.addItem( "36" );
         fontSizeComboBox.addItem( "48" );
         fontSizeComboBox.addItem( "72" );
         
         setLayout( new FlowLayout() );
         
         add( boldCheckBox );
         add( italicCheckBox );
         add( underlineCheckBox );
         add( fontComboBox );
         add( fontSizeComboBox );
      }
      
      // get bold property
      public boolean boldSelected()
      {
         return boldCheckBox.isSelected();
      }
      
      // get italic property
      public boolean italicSelected()
      {
         return italicCheckBox.isSelected();
      }
      
      // get underline property
      public boolean underlineSelected()
      {
         return underlineCheckBox.isSelected();
      }
      
      // get font name property
      public String getSelectedFontName()
      {
         return fontComboBox.getSelectedItem().toString();
      }
      
      // get font size property
      public int getSelectedFontSize()
      {
         return Integer.parseInt( 
            fontSizeComboBox.getSelectedItem().toString() );
      }
   }
}

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