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/*
* IzPack - Copyright 2001-2012 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2012 Tim Anderson
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.izforge.izpack.installer.gui;
import com.izforge.izpack.api.resource.Messages;
import com.izforge.izpack.gui.ButtonFactory;
import com.izforge.izpack.gui.IconsDatabase;
import com.izforge.izpack.installer.data.GUIInstallData;
import com.izforge.izpack.installer.panel.Panels;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import static com.izforge.izpack.api.GuiId.*;
/**
* Default implementation of {@link Navigator}.
*
* @author Tim Anderson
*/
public class DefaultNavigator implements Navigator
{
/**
* The parent frame.
*/
private InstallerFrame frame;
/**
* The panels.
*/
private final Panels panels;
/**
* The previous button.
*/
private JButton previous;
/**
* The next button.
*/
private JButton next;
/**
* The quit button.
*/
private JButton quit;
/**
* Flag to indicate if the current panel is being switched for another.
*/
private boolean switchPanel;
/**
* Determines if the next button should be configured after panel switching; {@code true} prior to switching,
* {@code false} if the button is configured externally during the switch.
*/
private boolean configureNext = true;
/**
* Determines if the previous button should be configured after panel switching; {@code true} prior to switching,
* {@code false} if the button is configured externally during the switch.
*/
private boolean configurePrevious = true;
/**
* Constructs a {@code DefaultNavigator}.
*
* @param panels the panels
* @param icons the icons
* @param installData the installation data
*/
public DefaultNavigator(Panels panels, IconsDatabase icons, GUIInstallData installData)
{
this.panels = panels;
Messages messages = installData.getMessages();
previous = ButtonFactory.createButton(messages.get("installer.prev"), icons.get("stepback"),
installData.buttonsHColor);
ActionListener navHandler = new NavigationHandler();
previous.addActionListener(navHandler);
previous.setName(BUTTON_PREV.id);
previous.setVisible(false);
next = ButtonFactory.createButton(messages.get("installer.next"), icons.get("stepforward"),
installData.buttonsHColor);
next.setName(BUTTON_NEXT.id);
next.addActionListener(navHandler);
quit = ButtonFactory.createButton(messages.get("installer.quit"), icons.get("stop"),
installData.buttonsHColor);
quit.setName(BUTTON_QUIT.id);
quit.addActionListener(navHandler);
configureVisibility();
}
protected void updateButtonText(Messages messages)
{
previous.setText(messages.get("installer.prev"));
next.setText(messages.get("installer.next"));
quit.setText(messages.get("installer.quit"));
}
/**
* Call to reserve mnemonics for the buttons used by the navigator.
*/
public void reserveNavigatorButtonMnemonics()
{
JButton [] buttons = {
quit,
next,
previous
};
ButtonFactory.reserveButtonMnemonics(buttons);
}
/**
* Registers the parent installer frame.
*
* This should be invoked before using any other methods.
*
* @param frame the frame.
*/
public void setInstallerFrame(InstallerFrame frame)
{
this.frame = frame;
}
/**
* Determines if the next panel may be navigated to.
*
* @return {@code true} if the next panel may be navigated to
*/
@Override
public boolean isNextEnabled()
{
return panels.isNextEnabled();
}
/**
* Determines if the next panel may be navigated to.
*
* @param enable if {@code true}, enable navigation, otherwise disable it
*/
@Override
public void setNextEnabled(boolean enable)
{
configureNext = !switchPanel;
panels.setNextEnabled(enable);
next.setEnabled(enable);
}
/**
* Makes the next button visible or invisible.
*
* @param visible if {@code true} makes the button visible, otherwise makes it invisible.
*/
@Override
public void setNextVisible(boolean visible)
{
next.setVisible(visible);
}
/**
* Sets the text for the 'next' button.
*
* @param text the button text. May be {@code null}
*/
@Override
public void setNextText(String text)
{
next.setText(text);
}
/**
* Sets the icon for the 'next' button.
*
* @param icon the icon. May be {@code null}
*/
@Override
public void setNextIcon(Icon icon)
{
next.setIcon(icon);
}
/**
* Determines if the previous panel may be navigated to.
*
* @return {@code true} if the previous panel may be navigated to
*/
@Override
public boolean isPreviousEnabled()
{
return panels.isPreviousEnabled();
}
/**
* Determines if the previous panel may be navigated to.
*
* @param enable if {@code true}, enable navigation, otherwise disable it
*/
@Override
public void setPreviousEnabled(boolean enable)
{
configurePrevious = !switchPanel;
panels.setPreviousEnabled(enable);
previous.setEnabled(enable);
}
/**
* Makes the previous button visible/invisible.
*
* @param visible if {@code true} makes the button visible, otherwise makes it invisible.
*/
@Override
public void setPreviousVisible(boolean visible)
{
previous.setVisible(visible);
}
/**
* Sets the text for the 'previous' button.
*
* @param text the button text. May be {@code null}
*/
@Override
public void setPreviousText(String text)
{
previous.setText(text);
}
/**
* Sets the icon for the 'previous' button.
*
* @param icon the icon. May be {@code null}
*/
@Override
public void setPreviousIcon(Icon icon)
{
previous.setIcon(icon);
}
/**
* Determines if the 'quit' button is enabled.
*
* @return {@code true} if the 'quit' button is enabled
*/
@Override
public boolean isQuitEnabled()
{
return quit.isEnabled();
}
/**
* Determines if the 'quit' button is enabled.
*
* @param enable if {@code true}, enable quit, otherwise disable it
*/
@Override
public void setQuitEnabled(boolean enable)
{
quit.setEnabled(enable);
}
/**
* Makes the 'quit' button visible/invisible.
*
* @param visible if {@code true} makes the button visible, otherwise makes it invisible.
*/
@Override
public void setQuitVisible(boolean visible)
{
quit.setVisible(visible);
}
/**
* Sets the text for the 'quit' button.
*
* @param text the button text. May be {@code null}
*/
@Override
public void setQuitText(String text)
{
quit.setText(text);
}
/**
* Sets the icon for the 'quit' button.
*
* @param icon the icon. May be {@code null}
*/
@Override
public void setQuitIcon(Icon icon)
{
quit.setIcon(icon);
}
/**
* Navigates to the next panel.
*
* @return {@code true} if the next panel was displayed, or {@code false} if the last panel is displayed
*/
@Override
public boolean next()
{
return next(true);
}
/**
* Navigates to the next panel.
*
* @param validate if {@code true}, only move to the next panel if validation succeeds
* @return {@code true} if the next panel was navigated to
*/
public boolean next(boolean validate)
{
boolean result = false;
if (panels.isNextEnabled())
{
try
{
preSwitchPanel();
result = panels.next(validate);
}
finally
{
postSwitchPanel();
}
configureVisibility();
}
return result;
}
/**
* Navigates to the previous panel.
*
* @return {@code true} if the previous panel was displayed, or {@code false} if the first panel is displayed
*/
@Override
public boolean previous()
{
boolean result = false;
if (panels.isPreviousEnabled())
{
try
{
preSwitchPanel();
result = panels.previous();
}
finally
{
postSwitchPanel();
}
configureVisibility();
}
return result;
}
/**
* Quits installation, if quit is enabled, and installation is complete.
*
* This method does not return if the quit is accepted.
*/
@Override
public void quit()
{
if (isQuitEnabled())
{
frame.quit();
}
}
/**
* Returns the button to navigate to the next panel.
*
* @return the 'next' button
*/
protected JButton getNext()
{
return next;
}
/**
* Returns the button to navigate to the previous panel.
*
* @return the 'previous' button
*/
protected JButton getPrevious()
{
return previous;
}
/**
* Returns the button to quit installation.
*
* @return the 'quit' button
*/
protected JButton getQuit()
{
return quit;
}
/**
* Sets the default button.
*
* This sets the default to the "next" button if it is enabled. If not it sets it to the "quit" button, if it is
* enabled.
*
* @return the default button, or {@code null} if the buttons aren't enabled
*/
protected JButton setDefaultButton()
{
JButton result = null;
if (next.isEnabled())
{
result = next;
quit.setDefaultCapable(false);
previous.setDefaultCapable(false);
next.setDefaultCapable(true);
}
else if (quit.isEnabled())
{
result = quit;
quit.setDefaultCapable(true);
previous.setDefaultCapable(false);
next.setDefaultCapable(false);
}
return result;
}
/**
* Invoked prior to switching panels.
*/
private void preSwitchPanel()
{
switchPanel = true;
configureNext = true;
configurePrevious = true;
}
/**
* Invoked after switching panels.
*/
private void postSwitchPanel()
{
switchPanel = false;
}
/**
* Configures next/previous button visibility.
*/
private void configureVisibility()
{
boolean isLastPanel = panels.getNext(true) == -1;
if (isLastPanel)
{
// last panel. Disable navigation.
setPreviousVisible(false);
setPreviousEnabled(false);
setNextVisible(false);
setNextEnabled(false);
}
else
{
if (configurePrevious)
{
// only configure the previous button if it wasn't modified during panel switching
boolean enablePrev = panels.getPrevious(true) != -1;
setPreviousVisible(enablePrev);
setPreviousEnabled(enablePrev);
}
if (configureNext)
{
// only configure the next button if it wasn't modified during panel switching
boolean enableNext = !isLastPanel;
setNextVisible(enableNext);
setNextEnabled(enableNext);
}
}
if (frame != null && frame.getRootPane() != null)
{
// With VM version >= 1.5 setting default button one time will not work.
// Therefore we set it every newPanel switch and that also later. But in
// the moment it seems so that the quit button will not used as default button.
// No idea why... (Klaus Bartz, 06.09.25)
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
frame.getRootPane().setDefaultButton(setDefaultButton());
}
});
}
}
/**
* Handles the events from the navigation bar elements.
*
* @author Julien Ponge
*/
class NavigationHandler implements ActionListener
{
@Override
public void actionPerformed(final ActionEvent e)
{
// Some panels activation may be slow, hence we block the GUI, spin a thread to handle navigation then
// release the GUI.
new Thread(new Runnable()
{
@Override
public void run()
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
frame.blockGUI();
navigate(e);
frame.releaseGUI();
}
});
}
}).start();
}
private void navigate(ActionEvent e)
{
Object source = e.getSource();
if (source == previous)
{
previous();
}
else if (source == next)
{
next();
}
else if (source == quit)
{
quit();
}
}
}
}
