font2dtest.java

一个小公司要求给写的很简单的任务管理系统。

            if ( showFontInfoOpt ) {
                fireUpdateFontInfo();
                fontInfoDialog.show();
            }
            else
              fontInfoDialog.hide();
        }
        catch ( Exception ex ) {
            fireChangeStatus( "ERROR: Failed to Load Options File; See Stack Trace", true );
            ex.printStackTrace();
        }
    }

    /// Loads a previously saved image 
    private void loadComparisonPNG( String fileName ) {
        try {
	    BufferedImage image =
		javax.imageio.ImageIO.read(new File(fileName));
            JFrame f = new JFrame( "Comparison PNG" );
            ImagePanel ip = new ImagePanel( image );
            f.setResizable( false );
            f.getContentPane().add( ip );
            f.addWindowListener( new WindowAdapter() {
                public void windowClosing( WindowEvent e ) {
                    ( (JFrame) e.getSource() ).dispose();
                }
            });
            f.pack();
            f.show();
        }
        catch ( Exception ex ) {
            fireChangeStatus( "ERROR: Failed to Load PNG File; See Stack Trace", true );
            ex.printStackTrace();
        }
    }

    /// Interface functions...

    /// ActionListener interface function
    /// Responds to JMenuItem, JTextField and JButton actions
    public void actionPerformed( ActionEvent e ) {
        Object source = e.getSource();

        if ( source instanceof JMenuItem ) {
            JMenuItem mi = (JMenuItem) source;
            String itemName = mi.getText();

            if ( itemName.equals( "Save Selected Options..." )) {
                String fileName = promptFile( true, "options.txt" );
                if ( fileName != null )
                  writeCurrentOptions( fileName );
            }
            else if ( itemName.equals( "Load Options..." )) {
                String fileName = promptFile( false, "options.txt" );
                if ( fileName != null )
                  loadOptions( fileName );
            }
            else if ( itemName.equals( "Save as PNG..." )) {
                String fileName = promptFile( true, fontMenu.getSelectedItem() + ".png" );
                if ( fileName != null )
                  fp.doSavePNG( fileName );
            }
            else if ( itemName.equals( "Load PNG File to Compare..." )) {
                String fileName = promptFile( false, null );
                if ( fileName != null )
                  loadComparisonPNG( fileName );
            }
            else if ( itemName.equals( "Page Setup..." ))
              fp.doPageSetup();
            else if ( itemName.equals( "Print..." ))
              printDialog.show();
            else if ( itemName.equals( "Close" ))
              parent.dispose();
            else if ( itemName.equals( "Exit" ))
              System.exit(0);
        }

        else if ( source instanceof JTextField ) {
            JTextField tf = (JTextField) source;
            float sz = 12f;
            try {
                 sz = Float.parseFloat(sizeField.getText());
                 if (sz < 1f || sz > 120f) {
                      sz = 12f;
                      sizeField.setText("12");
                 }
            } catch (Exception se) {
                 sizeField.setText("12");
            }
            if ( tf == sizeField )
              fp.setFontParams( fontMenu.getSelectedItem(),
                                sz,
                                styleMenu.getSelectedIndex(),
                                transformMenu.getSelectedIndex() );
        }

        else if ( source instanceof JButton ) {
            String itemName = ( (JButton) source ).getText();
            /// Print dialog buttons...
            if ( itemName.equals( "Print" )) {
                for ( int i = 0; i < printModeCBs.length; i++ )
                  if ( printModeCBs[i].isSelected() ) {
                      printDialog.hide();
                      fp.doPrint( i );
                  }
            }
            else if ( itemName.equals( "Cancel" ))
              printDialog.hide();
            /// Update button from Usert Text JDialog...
            else if ( itemName.equals( "Update" ))
              fp.setTextToDraw( fp.USER_TEXT, null,
                                parseUserText( userTextArea.getText() ), null );
        }
        else if ( source instanceof JComboBox ) {
            JComboBox c = (JComboBox) source;
            
            /// RangeMenu handles actions by itself and then calls fireRangeChanged,
            /// so it is not listed or handled here
            if ( c == fontMenu || c == styleMenu || c == transformMenu ) {
		float sz = 12f;
		try {
		    sz = Float.parseFloat(sizeField.getText());
		    if (sz < 1f || sz > 120f) {
			sz = 12f;
			sizeField.setText("12");
		    }
		} catch (Exception se) {
		    sizeField.setText("12");
		}
		fp.setFontParams(fontMenu.getSelectedItem(),
				 sz,
				 styleMenu.getSelectedIndex(),
				 transformMenu.getSelectedIndex());
	    } else if ( c == methodsMenu )
              fp.setDrawMethod( methodsMenu.getSelectedIndex() );
            else if ( c == textMenu ) {

                if(canDisplayCheck) {
                    fireRangeChanged();
                }

                int selected = textMenu.getSelectedIndex();

                if ( selected == fp.RANGE_TEXT )
                  fp.setTextToDraw( fp.RANGE_TEXT, rm.getSelectedRange(),
                                    null, null );
                else if ( selected == fp.USER_TEXT )
                  fp.setTextToDraw( fp.USER_TEXT, null,
                                    parseUserText( userTextArea.getText() ), null );
                else if ( selected == fp.FILE_TEXT ) {
                    String fileName = promptFile( false, null );
                    if ( fileName != null ) {
		      tFileName = fileName;
		      readTextFile( fileName );
		    } else {
                        /// User cancelled selection; reset to previous choice
                        c.setSelectedIndex( currentTextChoice );
                        return;
                    }
                }
                else if ( selected == fp.ALL_GLYPHS )
                  fp.setTextToDraw( fp.ALL_GLYPHS, null, null, null );

                updateGUI();
                currentTextChoice = selected;
            }
            else if ( c == transformMenuG2 ) {
            	fp.setTransformG2( transformMenuG2.getSelectedIndex() );
            }
	    else if (c == antiAliasMenu || c == fracMetricsMenu) {
		if (c == antiAliasMenu) {
		    boolean enabled = FontPanel.AAValues.
			isLCDMode(antiAliasMenu.getSelectedItem());
			contrastSlider.setEnabled(enabled);
		}
		fp.setRenderingHints(antiAliasMenu.getSelectedItem(),
				     fracMetricsMenu.getSelectedItem(),
				     contrastSlider.getValue());
	    }
        }
    }

    public void stateChanged(ChangeEvent e) {
	 Object source = e.getSource();
	 if (source instanceof JSlider) {
	     fp.setRenderingHints(antiAliasMenu.getSelectedItem(),
				  fracMetricsMenu.getSelectedItem(),
				  contrastSlider.getValue());	     
	 }
    }

    /// ItemListener interface function
    /// Responds to JCheckBoxMenuItem, JComboBox and JCheckBox actions
    public void itemStateChanged( ItemEvent e ) {
        Object source = e.getSource();

        if ( source instanceof JCheckBoxMenuItem ) {
            JCheckBoxMenuItem cbmi = (JCheckBoxMenuItem) source;
            if ( cbmi == displayGridCBMI )
              fp.setGridDisplay( displayGridCBMI.getState() );
            else if ( cbmi == force16ColsCBMI )
              fp.setForce16Columns( force16ColsCBMI.getState() );
            else if ( cbmi == showFontInfoCBMI ) {
                if ( showFontInfoCBMI.getState() ) {
                    fireUpdateFontInfo();
                    fontInfoDialog.show();
                }
                else
                  fontInfoDialog.hide();
            }
        }
    }

    private static void printUsage() {
        String usage = "Usage: java -jar Font2DTest.jar [options]\n" +
            "\nwhere options include:\n" +
            "    -dcdc | -disablecandisplaycheck disable canDisplay check for font\n" +
            "    -?    | -help                   print this help message\n" +
            "\nExample :\n" +
            "     To disable canDisplay check on font for ranges\n" +
            "     java -jar Font2DTest.jar -dcdc";
        System.out.println(usage);
        System.exit(0);
    }

    /// Main function
    public static void main(String argv[]) {
        
        if(argv.length > 0) {
            if(argv[0].equalsIgnoreCase("-disablecandisplaycheck") ||
               argv[0].equalsIgnoreCase("-dcdc")) {
                canDisplayCheck = false;
            }
            else {
                printUsage();
            }
        }

	UIManager.put("swing.boldMetal", Boolean.FALSE);
        final JFrame f = new JFrame( "Font2DTest" );
        final Font2DTest f2dt = new Font2DTest( f, false );
        f.addWindowListener( new WindowAdapter() {
            public void windowOpening( WindowEvent e ) { f2dt.repaint(); }
            public void windowClosing( WindowEvent e ) { System.exit(0); }
        });

        f.getContentPane().add( f2dt );
        f.pack();
        f.show();
    }

    /// Inner class definitions...

    /// Class to display just an image file
    /// Used to show the comparison PNG image
    private final class ImagePanel extends JPanel {
        private final BufferedImage bi;
        
        public ImagePanel( BufferedImage image ) {
            bi = image;
        }

        public Dimension getPreferredSize() {
            return new Dimension( bi.getWidth(), bi.getHeight() );
        }

        public void paintComponent( Graphics g ) {
            g.drawImage( bi, 0, 0, this );
        }
    }

    /// Classes made to avoid repetitive calls... (being lazy)
    private final class ButtonV2 extends JButton {
        public ButtonV2( String name, ActionListener al ) {
            super( name );
            this.addActionListener( al );
        }
    }

    private final class ChoiceV2 extends JComboBox {
        
        private BitSet bitSet = null;

	public ChoiceV2() {;}

        public ChoiceV2( ActionListener al ) {
            super();
            this.addActionListener( al );
        }

        public ChoiceV2( ActionListener al, boolean fontChoice) {
            this(al);
            if(fontChoice) {
                //Register this component in ToolTipManager
                setToolTipText("");
                bitSet = new BitSet();
                setRenderer(new ChoiceV2Renderer(this));
            }
        }
        
        public String getToolTipText() {
            int index = this.getSelectedIndex();
            String fontName = (String) this.getSelectedItem();
            if(fontName != null && 
               (textMenu.getSelectedIndex() == fp.RANGE_TEXT)) {
                if (getBit(index)) {
                    return "Font \"" + fontName + "\" can display some characters in \"" + 
                        rm.getSelectedItem() + "\" range";
                }
                else {
                    return "Font \"" + fontName + "\" cannot display any characters in \"" + 
                        rm.getSelectedItem() + "\" range";
                }
            }
            return super.getToolTipText();
        }

        public void setBit(int bitIndex, boolean value) {
            bitSet.set(bitIndex, value);
        }

        public boolean getBit(int bitIndex) {
            return bitSet.get(bitIndex);
        }
    }
 
    private final class ChoiceV2Renderer extends DefaultListCellRenderer {
 
        private ImageIcon yesImage, blankImage;
        private ChoiceV2 choice = null;

        public ChoiceV2Renderer(ChoiceV2 choice) {
            try {
                yesImage = new ImageIcon(getClass().getResource("yes.gif"));
                blankImage = new ImageIcon(getClass().getResource("blank.gif"));
            }
            catch(Exception exception) {
                System.out.println("Exception : " + exception);
            }
            this.choice = choice;
        }
 
        public Component getListCellRendererComponent(JList list,
                                                      Object value,
                                                      int index,
                                                      boolean isSelected,
                                                      boolean cellHasFocus) {

            if(textMenu.getSelectedIndex() == fp.RANGE_TEXT) {

                super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);

                //For JComboBox if index is -1, its rendering the selected index.
                if(index == -1) {
                    index = choice.getSelectedIndex();
                }
                
                if(choice.getBit(index)) {
                    setIcon(yesImage);
                }
                else {
                    setIcon(blankImage);
                }

            } else {
                super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                setIcon(blankImage);
            }

            return this;
        }
    }

    private final class LabelV2 extends JLabel {
        public LabelV2( String name ) {
            super( name );
        }
    }

    private final class MenuItemV2 extends JMenuItem {
        public MenuItemV2( String name, ActionListener al ) {
            super( name );
            this.addActionListener( al );
        }
    }

    private final class CheckboxMenuItemV2 extends JCheckBoxMenuItem {
        public CheckboxMenuItemV2( String name, boolean b, ItemListener il ) {
            super( name, b );
            this.addItemListener( il );
        }
    }
}