treekeyhandler.java

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/**
 *   TreeKeyHandler.java
 *   Copyright 2005 Carlos Silva A.
 * 
 *   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 jgantt.view.tree;

import java.awt.Rectangle;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Vector;

import jgantt.model.Project;
import jgantt.model.Task;
import jgantt.view.adapters.ProjectViewModel;

/**
 * TreeKeyHandler
 * 
 * <p>$Date: 2005/05/05 08:25:49 $</p> 
 * @version $Revision: 1.4 $
 * @author Carlos Silva
 */
public class TreeKeyHandler implements KeyListener {
	TaskTree taskTree;
	/**
	 * 
	 */
	public TreeKeyHandler(TaskTree tree) {
		super();
		taskTree = tree;
	}

	/**
	 * @see java.awt.event.KeyListener#keyPressed(java.awt.event.KeyEvent)
	 */
	public void keyPressed(KeyEvent ev) {
		//		System.out.println("processKeyEvent char:"+ev.getKeyChar()+ " code:"+ ev.getKeyCode()+" text:"+KeyEvent.getKeyText(ev.getKeyCode()));
		if (((ev.getModifiers()&(KeyEvent.ALT_MASK|KeyEvent.CTRL_MASK)))>0)
			return;
		if ((ev.getKeyChar() >= KeyEvent.VK_SPACE)
			&& (ev.getKeyChar() < KeyEvent.VK_DELETE)) {
			taskTree.initEdit(ev);
			return;
		}
		Project project = taskTree.project;
		Task focusTask = taskTree.focusTask;
		Column focusColumn = taskTree.focusColumn;
		ProjectViewModel pvModel = taskTree.pvModel;
		Vector columns = taskTree.columns;
		

		Rectangle bounds = taskTree.getBounds();
		int pageSize =
			(int) ((bounds.getHeight() - taskTree.treeOptions.headerHeight)
				/ taskTree.treeOptions.rowHeight)
				- 1;

		boolean modifiers =
			(ev.getModifiers()
				& (KeyEvent.CTRL_MASK | KeyEvent.SHIFT_MASK | KeyEvent.ALT_MASK))
				> 0;
		if (!modifiers) {
			switch (ev.getKeyCode()) {
				case KeyEvent.VK_DOWN :
					if (focusTask == null)
						taskTree.setFocus(project.getTask(0), focusColumn);
					else {
						// bajar hasta encontrar uno visible
						int next = focusTask.getId() + 1 - 1;
						while ((next < project.getTaskCount() - 1)
							&& (!project.getTask(next).isVisible())) {
							next++;
						}
						if (next >= project.getTaskCount() - 1)
							next = project.getTaskCount() - 1;
						taskTree.setFocus(project.getTask(next));
					}
					break;
				case KeyEvent.VK_PAGE_DOWN :
					// TODO: Corregir salto con filas invisibles.
					if (focusTask == null)
						taskTree.setFocus(project.getTask(0));
					else {
						int newId =
							Math.min(
								focusTask.getId() - 1 + pageSize,
								project.getTaskCount() - 1);
						taskTree.setFocus(project.getVisibleTask(project.getVisibleTaskCount()-1));
					}
					break;
				case KeyEvent.VK_PAGE_UP :
					// TODO: Corregir salto con filas invisibles.
					if (focusTask == null)
						taskTree.setFocus(project.getVisibleTask(0), focusColumn);
					else {
						int prev =
							Math.max(focusTask.getId() - 1 - pageSize, 0);
						taskTree.setFocus(project.getTask(prev), focusColumn);
					}
					break;
				case KeyEvent.VK_HOME :
					taskTree.setFocus(focusTask, (Column) columns.get(0));
					break;
				case KeyEvent.VK_END :
					taskTree.setFocus(
						focusTask,
						(Column) columns.get(columns.size() - 1));
					break;
				case KeyEvent.VK_UP :
					if (focusTask == null)
						taskTree.setFocus(project.getVisibleTask(0), focusColumn);
					else {
						int prev = focusTask.getId() - 1 - 1;
						if (prev < 0)
							return;
						while ((prev >= 0)
							&& (!project.getTask(prev).isVisible())) {
							prev--;
						}
						if (prev < 0)
							prev =
								Math.max(focusTask.getId() - 1 - pageSize, 0);
						taskTree.setFocus(project.getTask(prev), focusColumn);
					}
					break;
				case KeyEvent.VK_LEFT :
					if (focusColumn == null)
						taskTree.setFocus(focusTask, (Column) columns.get(0));
					else {
						int newId = columns.indexOf(focusColumn) - 1;
						if (newId < 0)
							return;
						taskTree.setFocus(
							focusTask,
							(Column) columns.get(newId));
					}
					break;
				case KeyEvent.VK_RIGHT :
					if (focusColumn == null)
						taskTree.setFocus(
							focusTask,
							(Column) columns.get(columns.size() - 1));
					else {
						int newId = columns.indexOf(focusColumn) + 1;
						if (newId >= columns.size())
							return;
						taskTree.setFocus(
							focusTask,
							(Column) columns.get(newId));
					}
					break;
				case KeyEvent.VK_F2 :
					taskTree.initEdit(null);
					break;				
				default :
					break;
			}
		} else if (
			(ev.getModifiers()
				& (~KeyEvent.CTRL_MASK
					| KeyEvent.SHIFT_MASK
					| ~KeyEvent.ALT_MASK))
				> 0) {
			switch (ev.getKeyCode()) {				
				case KeyEvent.VK_RIGHT :
					pvModel.asChildTask();
					break;
				case KeyEvent.VK_LEFT :
					pvModel.deChildTask();
					break;
				case KeyEvent.VK_UP :
					pvModel.goUpTask();
					break;
				case KeyEvent.VK_DOWN :
					pvModel.goDownTask();
					break;

			}
		}
	}

	/**
	 * @see java.awt.event.KeyListener#keyReleased(java.awt.event.KeyEvent)
	 */
	public void keyReleased(KeyEvent arg0) {
	}
	/**
	 * @see java.awt.event.KeyListener#keyTyped(java.awt.event.KeyEvent)
	 */
	public void keyTyped(KeyEvent arg0) {
	}
}