TaskPanelGroup.java

/*
 * Copyright (c) 2014 tabletoptool.com team.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     rptools.com team - initial implementation
 *     tabletoptool.com team - further development
 */
package com.t3.swing;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
/*
 * $Id$
 *
 * Copyright (C) 2005, Digital Motorworks LP, a wholly owned subsidiary of ADP.
 * The contents of this file are protected under the copyright laws of the
 * United States of America with all rights reserved. This document is
 * confidential and contains proprietary information. Any unauthorized use or
 * disclosure is expressly prohibited.
 */

public class TaskPanelGroup extends JPanel {

	private int gap = 0;
	
	public static final String TASK_PANEL_LIST = "taskPanelGroup.panelList";
	
	private List<TaskPanel> taskPanelList = new ArrayList<TaskPanel>();
	
	public TaskPanelGroup() {
		this(0);
	}
	
    public TaskPanelGroup (int gap) {
    	this.gap = gap;
        setLayout(new TaskPanelGroupLayout());
    }

    public TaskPanel getTaskPanel(String title) {
    	
    	for (TaskPanel taskPanel : taskPanelList) {
    		if (title.equals(taskPanel.getTitle())) {
    			return taskPanel;
    		}
    	}
    	
    	return null;
    }
    
    @Override
    public Component add(String name, Component comp) {
    	add(comp, name);
    	return comp;
    }

    @Override
    public void add(Component comp, Object title) {
        if (!(title instanceof String)) {
            // LATER: Title should be able to handle any component
            throw new IllegalArgumentException("Must supply a string title");
        }
        
        TaskPanel taskPanel = new TaskPanel((String) title, comp);
        firePropertyChange(TASK_PANEL_LIST, null, taskPanel);
        
        taskPanelList.add(taskPanel);
        add (taskPanel);
    }
    
    public List<TaskPanel> getTaskPanels() {
    	return Collections.unmodifiableList(taskPanelList);
    }
    
    private class TaskPanelGroupLayout implements LayoutManager {
        
        @Override
		public void addLayoutComponent(String name, Component comp) {
        }
        
        @Override
		public void layoutContainer(Container parent) {
            
            Dimension size = getSize();
            Insets insets = getInsets();
            
            int heightRemaining = size.height - insets.bottom - insets.top;
            int openPanelCount = 0;

            TaskPanel lastPanel = null;
            for (Component comp : getComponents()) {
                if (!(comp instanceof TaskPanel)) {
                    continue;
                }
                
                TaskPanel panel = (TaskPanel) comp;
                
                if (!panel.isOpen()) {
                    heightRemaining -= panel.getPreferredSize().height;
                } else {
                    openPanelCount ++;
                    heightRemaining -= gap;
                }
                
                lastPanel = panel;
            }
            
            // Add back the last gap
            if (lastPanel != null && lastPanel.isOpen()) {
            	heightRemaining += gap;
            }
            
            int openSize = openPanelCount > 0 ? heightRemaining / openPanelCount : 0;
            int currentHeight = insets.top;
            
            for (Component comp : getComponents()) {
                if (!(comp instanceof TaskPanel)) {
                    continue;
                }
                
                TaskPanel panel = (TaskPanel) comp;
                int height = panel.isOpen() ? openSize : panel.getPreferredSize().height;
                panel.setSize(size.width - insets.left - insets.right, height);
                panel.setLocation(insets.left, currentHeight);
                
                currentHeight += height;
                if (panel.isOpen()) {
                	currentHeight += gap;
                }
            }            
        }
        
        @Override
		public Dimension minimumLayoutSize(Container parent) {
            
            int width = 0;
            int height = 0;
            
            for (Component comp : getComponents()) {

                Dimension size = comp.getMinimumSize();
                if (size.width > width) {
                    width = size.width;
                }
                
                height += size.height;
            }
            
            return new Dimension(width, height);
        }
        
        @Override
		public Dimension preferredLayoutSize(Container parent) {
            int width = 0;
            int height = 0;
            
            for (Component comp : getComponents()) {

                Dimension size = comp.getPreferredSize();
                if (size.width > width) {
                    width = size.width;
                }
                
                height += size.height;
            }
            
            return new Dimension(width, height);
        }

        @Override
		public void removeLayoutComponent(Component comp) {
        }
    }
    
    public static void main(String[] args) {
        
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        TaskPanelGroup group = new TaskPanelGroup(5);
        group.add(new TaskPanel("Testing", new JButton ("Hello World")));
        group.add(Box.createHorizontalGlue());
        group.add(new TaskPanel("Testing 2", new JButton ("Hello World2")));
        group.add(Box.createHorizontalGlue());
        group.add(new TaskPanel("Testing 2", new JButton ("Hello World2")));
        group.add(Box.createHorizontalGlue());

        ((JComponent)f.getContentPane()).setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        f.add(group);
        f.pack();
        SwingUtil.centerOnScreen(f);

        f.setVisible(true);
        
    }
}