mainframe.java

Owing to the applet Gantt chart source yard, already Chinese melt, Gantt chart can demonstrate a Chi

/**
 *   Copyright 2004 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;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.io.File;
import java.util.Hashtable;

import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

import jgantt.MenuBuilder;
import jgantt.Messages;
import jgantt.model.IOManager;
import jgantt.model.Project;
import jgantt.model.ProjectChange;
import jgantt.model.ProjectListener;
import jgantt.view.adapters.ProjectViewModel;
import jgantt.view.adapters.ProjectViewModelChange;
import jgantt.view.adapters.ProjectViewModelListener;

/**
 * MainFrame, ventana principal
 * <p>
 * $Date: 2005/08/19 15:51:08 $
 * </p>
 * 
 * @version $Revision: 1.43 $
 * @author Carlos Silva
 */
public class MainFrame extends JFrame implements ProjectListener,
        ProjectViewModelListener {

    private static final long serialVersionUID = 1L;
    String WND_TITLE = Messages.getString("MainFrame.title");
    // / Main display
    GanttDisplay ganttDisplay;
    // / ViewModel
    ProjectViewModel pvModel = null;

    /**
     * Acceso a los menues segun su nombre. Relaciona el string del commando con
     * el JMenuItem
     */
    protected Hashtable menues = new Hashtable();

    /**
     * Crea una ventana para editar un proyecto nuevo
     */
    public MainFrame() {
        this(IOManager.createEmptyProject(), null);
    }

    /**
     * Crea una ventana para editar un proyecto existente almacenado en un
     * archivo. Crear el display y asigna los listener.
     */
    public MainFrame(Project project, File file) {
        super("");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        pvModel = new ProjectViewModel(project, file);
        ganttDisplay = new GanttDisplay(pvModel);

        GanttActionListener mainListener = pvModel.getMainActionListener();

        mainListener.setup(this, ganttDisplay);

        getContentPane().add(ganttDisplay, BorderLayout.CENTER);

        JMenuBar menuBar = MenuBuilder.buildMenuBar(mainListener, "menubar",
                menues);
        setJMenuBar(menuBar);
        // TODO Agregar ultimos archivos abiertos.

        updateUndoRedo();

        pvModel.addListener(this);
        project.addListener(this);

        setSize(new Dimension(850, 500));
    }

    /**
     * Obtiene una referencia al menu que representa un comando
     * 
     * @param cmd
     * @return
     */
    public JMenuItem getMenuItemForCommand(String cmd) {
        return (JMenuItem) menues.get(cmd);
    }

    /**
     * Cuando hay un nuevo proyecto cargado... se debe reasignar el listener
     * 
     * @see jgantt.view.adapters.ProjectViewModelListener#viewModelChanged(jgantt.view.adapters.ProjectViewModelChange)
     */
    public void viewModelChanged(ProjectViewModelChange c) {
        if (c.getId() == ProjectViewModelChange.NEW_PROJECT_LOADED)
            c.getProjectViewModel().getProject().addListener(this);
    }

    /**
     * Cuando cambia el proyecto se debe habilitar/deshabilitar undo y redo
     * 
     * @see jgantt.model.ProjectListener#projectChanged(jgantt.model.ProjectChange)
     */
    public void projectChanged(ProjectChange c) {
        updateUndoRedo();
    }

    /**
     * Habilita o deshabilita los menues de undo y redo
     */
    void updateUndoRedo() {
        Project project = pvModel.getProject();

        JMenuItem undoItem = getMenuItemForCommand(GanttActionListener.CMD_EDIT_UNDO);
        undoItem.setEnabled(!project.isUndoEmpty());

        updWindowTitle();

        JMenuItem redoItem = getMenuItemForCommand(GanttActionListener.CMD_EDIT_REDO);
        redoItem.setEnabled(!project.isRedoEmpty());
    }

    /**
     * Cambia el titulo de la ventana
     */
    public void updWindowTitle() {
        String fn;
        if (pvModel.getFile() != null)
            fn = pvModel.getFile().getName();
        else
            fn = "(not saved)";

        String t = pvModel.getProject().getName() + " - " + fn + " - "
                + WND_TITLE;

        if (!pvModel.getProject().isUndoEmpty())
            t = t + " * ";

        if (!t.equals(getTitle()))
            setTitle(t);
    }
}