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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (AS/400 Toolbox for Java - OSS version)
//
// Filename: MessageDialog.java
//
// The source code contained herein is licensed under the IBM Public License
// Version 1.0, which has been approved by the Open Source Initiative.
// Copyright (C) 1997-2000 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.access;
import java.awt.Button;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Panel;
import java.util.StringTokenizer;
// This class represents a dialog window that is used to display a message and optionally allow a choice to be made by the user.
class MessageDialog extends Dialog
{
private static final String copyright = "Copyright (C) 1997-2000 International Business Machines Corporation and others.";
static final long serialVersionUID = 4L;
private Button positiveButton_ = null; // Push button for OK or Yes.
private Button negativeButton_ = null; // Push button for No.
private AS400SignonDialogAdapter listener_ = null;
// Construct a message dialog that displays a message and one or two pushbuttons.
// @param parent The parent Window.
// @param messageText The message to display.
// @param titleText The window title text.
// @param allowChoice true for yes & no buttons, false for OK button.
MessageDialog(Frame parent, String messageText, String titleText, boolean allowChoice)
{
// Create a frame.
super(parent, titleText, true);
listener_ = new AS400SignonDialogAdapter(this);
// Create a GridBagLayout manager having three rows and four columns.
GridBagLayout layout = new GridBagLayout();
GridBagConstraints constraints = new GridBagConstraints();
constraints.fill = GridBagConstraints.BOTH;
constraints.insets = new Insets(8, 8, 0, 8);
setLayout(layout);
setResizable(false);
// Set the background color to light gray.
setBackground(Color.lightGray);
// Note: Labels can't display multiple lines. This is we use a Panel.
Panel panel = new Panel();
StringTokenizer tokenizer = new StringTokenizer(messageText, "\n");
panel.setLayout(new GridLayout(tokenizer.countTokens(), 1));
while(tokenizer.hasMoreTokens())
{
panel.add(new Label(tokenizer.nextToken()));
}
add(panel, layout, constraints, 0, 0, 1, 1);
// Create panels to hold the buttons of the specified button layout.
Panel centeringPanel = new Panel();
centeringPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
constraints.insets = new Insets(8, 8, 8, 8);
add(centeringPanel, layout, constraints, 0, 1, 1, 1);
Panel buttonPanel = new Panel();
buttonPanel.setLayout(new GridLayout(1, 2, 8, 0));
centeringPanel.add(buttonPanel);
// Add the buttons to the panel. Add event listeners to the buttons.
if (allowChoice)
{
positiveButton_ = new Button(ResourceBundleLoader.getText("DLG_YES_BUTTON"));
positiveButton_.addActionListener(listener_);
positiveButton_.addFocusListener(listener_);
positiveButton_.addKeyListener(listener_);
buttonPanel.add(positiveButton_);
negativeButton_ = new Button(ResourceBundleLoader.getText("DLG_NO_BUTTON"));
negativeButton_.addActionListener(listener_);
negativeButton_.addFocusListener(listener_);
negativeButton_.addKeyListener(listener_);
buttonPanel.add(negativeButton_);
}
else
{
positiveButton_ = new Button(ResourceBundleLoader.getCoreText("DLG_OK_BUTTON"));
positiveButton_.addActionListener(listener_);
positiveButton_.addFocusListener(listener_);
positiveButton_.addKeyListener(listener_);
buttonPanel.add(positiveButton_);
}
// Arrange the components in the dialog.
pack();
// Add a listener for window events.
addWindowListener(listener_);
}
// Display the dialog and wait for user response.
// @return true if user pressed OK or Yes; false if user pressed No.
boolean display()
{
// Set focus on the default button.
listener_.setFocalPoint(positiveButton_);
// Make the window visible. The call to show() will block the current thread until we hide or dispose of this dialog.
show();
return listener_.getFocalPoint() != negativeButton_;
}
// This methods adds a user interface component to the specified GridBagLayout manager using the specified constraints.
// @param component The user interface component to add.
// @param layout The GridBagLayout manager.
// @param constraints The constraints for the component.
// @param x The x coordinate of the leftmost cell of the component.
// @param y The y coordinate of the topmost cell of the component.
// @param width The horizontal measurement of the component in cells.
// @param height The vertical measurement of the component in cells.
protected void add(Component component, GridBagLayout layout, GridBagConstraints constraints, int x, int y, int width, int height)
{
constraints.gridx = x;
constraints.gridy = y;
constraints.gridwidth = width;
constraints.gridheight = height;
layout.setConstraints(component, constraints);
add(component);
}
}