undosetupdialog.java

用Java开发的、实现类似Visio功能的应用程序源码

/**
 *    $Id:UndoSetupDialog.java $
 *
 *    Copyright 2004 ~ 2005  JingFei International Cooperation LTD. All rights reserved. *
 */
package com.jfimagine.jfdraw.gui.dialog;
 

import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Container;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.BorderFactory;

import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JTextField;


import com.jfimagine.jfdraw.gui.resource.CADResource;
import com.jfimagine.utils.commonutil.CommonUtil;
import com.jfimagine.jfdraw.gui.GUIConst;


 /**
 * UndoSetupDialog class.  A class used to get a new undo depth in gui by user.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
public class UndoSetupDialog extends JDialog
                        implements ActionListener {

    public static final int	UNDODEPTH_MIN		=1;
    public static final int	UNDODEPTH_MAX		=50;

    private static UndoSetupDialog m_dialog;
    private static int m_undoDepth	=20;

    JTextField	undoDepthText;

    /**
     * Open a window, to input/modify an undo depth.
     *
     * @param modalFrame  Determines which frame the dialog depends on; it should be
     * a component in the dialog's controlling frame. 
     *
     * @param initialValue initial undo depth for modify
     * @return A new undo depth.
     */
    public static int getNewUndoDepth(Frame modalFrame,int initialValue) {
    	return getNewUndoDepth(modalFrame,null,initialValue);
    }    

    /**
     * Open a window, to input/modify a new undo depth.
     *
     * @param modalFrame  Determines which frame the dialog depends on; it should be
     * a component in the dialog's controlling frame. 
     *
     * @param refComp  This should be null if you want the dialog
     * to come up with its left corner in the center of the screen;
     * otherwise, it should be the component on top of which the
     * dialog should appear.
     *
     * @param initialValue initial undo depth for modify
     * @return A new undo depth.
     */
    public static int getNewUndoDepth(Frame modalFrame,Component refComp,int initialValue) {
    	return showDialog(modalFrame,refComp,initialValue);
    }    

    /**
     * Set up and show the dialog.  The first Component argument
     * determines which frame the dialog depends on; it should be
     * a component in the dialog's controlling frame. The second
     * Component argument should be null if you want the dialog
     * to come up with its left corner in the center of the screen;
     * otherwise, it should be the component on top of which the
     * dialog should appear.
     */
    private static int showDialog(Component frameComp,
                                    Component locationComp,
                                    int initialValue) {
        Frame frame = JOptionPane.getFrameForComponent(frameComp);
        m_dialog = new UndoSetupDialog(frame,
                                locationComp,
                                CADResource.getString("dialog.undoSetup"),
                                initialValue);
        m_dialog.setVisible(true);
        return m_undoDepth;
    }


    private UndoSetupDialog(Frame frame,
                       Component locationComp,
                       String title,
                       int initialValue) {
        super(frame, title, true);
	setResizable(false);

        //Create and initialize the buttons.
        JButton cancelButton = new JButton(CADResource.getString("button.cancel"));
        cancelButton.setFont(GUIConst.FONT_BUTTON);
        cancelButton.addActionListener(this);
        //
        final JButton confirmButton = new JButton(CADResource.getString("button.confirm"));
        confirmButton.setFont(GUIConst.FONT_BUTTON);
        confirmButton.setActionCommand("Confirm");
        confirmButton.addActionListener(this);
        getRootPane().setDefaultButton(confirmButton);

	
	if (initialValue<UNDODEPTH_MIN)
		initialValue	=UNDODEPTH_MIN;
	else if (initialValue>UNDODEPTH_MAX)
		initialValue	=UNDODEPTH_MAX;
	
	m_undoDepth	=initialValue;
 	undoDepthText	=new JTextField(CommonUtil.i2s(m_undoDepth));
 	undoDepthText.setFont(GUIConst.FONT_LABEL);
 	undoDepthText.setPreferredSize(new Dimension(50,20));
 	undoDepthText.setEditable(true);

	
	//a top panel for placing undo label, undo text field.
        JPanel undoPanel = new JPanel();
        undoPanel.setLayout(new BoxLayout(undoPanel, BoxLayout.X_AXIS));
        JLabel undoLabel = new JLabel(CADResource.getString("label.undo.undoDepth"));
        undoLabel.setFont(GUIConst.FONT_LABEL);
        undoPanel.add(undoLabel);
        undoPanel.add(Box.createRigidArea(new Dimension(5,0)));
        undoPanel.add(undoDepthText);
        undoPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

        //Lay out the buttons from left to right.
        JPanel buttonPane = new JPanel();
        //buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
        buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.X_AXIS));
        buttonPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        buttonPane.add(Box.createRigidArea(new Dimension(30, 0)));
        buttonPane.add(confirmButton);
        buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
        buttonPane.add(cancelButton);

        //Put everything together, using the content pane's BorderLayout.
        Container contentPane = getContentPane();
        contentPane.add(undoPanel, BorderLayout.CENTER);
        contentPane.add(buttonPane, BorderLayout.SOUTH);

        pack();
        setLocationRelativeTo(locationComp);
    }

    //Handle clicks on the Set and Cancel buttons.
    public void actionPerformed(ActionEvent e) {
        if ("Confirm".equals(e.getActionCommand())) {
        	int undoDepth	=CommonUtil.s2i(undoDepthText.getText());
        	if (undoDepth==0)
        		undoDepth	=1;
        	else if (undoDepth<UNDODEPTH_MIN)
        		undoDepth	=UNDODEPTH_MIN;
        	else if (undoDepth>UNDODEPTH_MAX)
        		undoDepth	=UNDODEPTH_MAX;
		
		m_undoDepth	=undoDepth;		
        }else{
        	//do nothing, don't change m_undoDepth
        }

        m_dialog.setVisible(false);
    }
    
}