package com.opendoorlogistics.codefromweb;
/*
* From https://github.com/dukke/swing-desktopScrollPane/blob/master/DesktopScrollPane
* Copyright (c) 2013 DesktopScrollPane Pedro Duque Vieira. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* o Neither the name of DesktopScrollPane Pedro Duque Vieira nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;
public class DesktopScrollPane extends JScrollPane {
private JDesktopPane desktopPane;
private InternalFrameComponentListener componentListener;
/**
* creates the DesktopScrollPane object
*
* @param desktopPane
* a reference to the JDesktopPane object
*/
public DesktopScrollPane(JDesktopPane desktopPane) {
componentListener = new InternalFrameComponentListener();
this.desktopPane = desktopPane;
desktopPane.addContainerListener(new ContainerListener() {
@Override
public void componentAdded(ContainerEvent e) {
onComponentAdded(e);
}
@Override
public void componentRemoved(ContainerEvent e) {
onComponentRemoted(e);
}
});
setViewportView(desktopPane);
// set some defaults
setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
}
private void onComponentRemoted(ContainerEvent event) {
Component removedComponent = event.getChild();
if (removedComponent instanceof JInternalFrame)
removedComponent.removeComponentListener(componentListener);
}
private void onComponentAdded(ContainerEvent event) {
Component addedComponent = event.getChild();
if (addedComponent instanceof JInternalFrame) {
addedComponent.addComponentListener(componentListener);
resizeDesktop();
}
}
/**
* returns all internal frames placed upon the desktop
*
* @return a JInternalFrame array containing references to the internal frames
*/
public JInternalFrame[] getAllFrames() {
return desktopPane.getAllFrames();
}
/**
* sets the preferred size of the desktop
*
* @param dim
* a Dimension object representing the desired preferred size
*/
public void setDesktopSize(Dimension dim) {
desktopPane.setPreferredSize(dim);
desktopPane.revalidate();
}
/**
* resizes the desktop based upon the locations of its internal frames. This updates the desktop scrollbars in real-time.
*/
public void resizeDesktop() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// has to go through all the internal frames now and make sure none
// off screen, and if so, add those scroll bars!
Rectangle viewPort = getViewport().getViewRect();
int maxX = viewPort.width + viewPort.x, maxY = viewPort.height + viewPort.y;
int minX = viewPort.x, minY = viewPort.y;
// determine the min/max extents of all internal frames
JInternalFrame frame = null;
JInternalFrame[] frames = getAllFrames();
for (int i = 0; i < frames.length; i++) {
frame = frames[i];
if (frame.getX() < minX) { // get minimum X
minX = frame.getX();
}
if ((frame.getX() + frame.getWidth()) > maxX) {
maxX = frame.getX() + frame.getWidth();
}
if (frame.getY() < minY) { // get minimum Y
minY = frame.getY();
}
if ((frame.getY() + frame.getHeight()) > maxY) {
maxY = frame.getY() + frame.getHeight();
}
}
// Don't count with frames that get off screen from the left side ant the top
if (minX < 0)
minX = 0;
if (minY < 0)
minY = 0;
setVisible(false); // don't update the viewport
// while we move everything (otherwise desktop looks 'bouncy')
if (minX != 0 || minY != 0) {
// have to scroll it to the right or up the amount that it's off screen...
// before scroll, move every component to the right / down by that amount
for (int i = 0; i < frames.length; i++) {
frame = frames[i];
frame.setLocation(frame.getX() - minX, frame.getY() - minY);
}
// have to scroll (set the viewport) to the right or up the amount
// that it's off screen...
JViewport view = getViewport();
view.setViewSize(new Dimension((maxX - minX), (maxY - minY)));
view.setViewPosition(new Point((viewPort.x - minX), (viewPort.y - minY)));
setViewport(view);
}
// resize the desktop
setDesktopSize(new Dimension(maxX - minX, maxY - minY));
setVisible(true); // update the viewport again
}
});
}
private class InternalFrameComponentListener implements ComponentListener {
@Override
public void componentResized(ComponentEvent e) {
resizeDesktop();
}
@Override
public void componentMoved(ComponentEvent e) {
resizeDesktop();
}
@Override
public void componentShown(ComponentEvent e) {
}
@Override
public void componentHidden(ComponentEvent e) {
}
}
}