/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.project.ui;

import java.awt.Component;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import org.netbeans.api.project.Project;
import org.netbeans.api.project.ProjectUtils;
import org.openide.awt.MouseUtils;

/** Show a warning that no main project is set and allows choose it.
 *
 * @author  Jiri Rechtacek
 */
public class NoMainProjectWarning extends JPanel {
    
    private ChangeListener changeListener;
    
    /** Creates new form NoMainProjectWarning */
    public NoMainProjectWarning (Project[] projects) {
        initComponents();
        // add MainClassChooser
        ProjectsListModel model = new ProjectsListModel (projects);
        jList1.setModel (model);
        jList1.setSelectionMode (ListSelectionModel.SINGLE_SELECTION);
        if (model.getSize () > 0) {
            jList1.setSelectedIndex (0);
        }
        jList1.setCellRenderer(new ProjectsRenderer ());
        jList1.addListSelectionListener (new ListSelectionListener () {
            public void valueChanged (ListSelectionEvent evt) {
                if (changeListener != null) {
                    changeListener.stateChanged (new ChangeEvent (evt));
                }
            }
        });
        // support for double click to finish dialog with selected class
        jList1.addMouseListener (new MouseListener () {
            public void mouseClicked (MouseEvent e) {
                if (MouseUtils.isDoubleClick (e)) {
                    if (getSelectedProject () != null) {
                        if (changeListener != null) {
                            changeListener.stateChanged (new ChangeEvent (e));
                        }
                    }
                }
            }
            public void mousePressed (MouseEvent e) {}
            public void mouseReleased (MouseEvent e) {}
            public void mouseEntered (MouseEvent e) {}
            public void mouseExited (MouseEvent e) {}
        });
    }
    
    /** Returns the selected project or null if no project is selected.
     *
     * @return project or null if no project is selected
     */ 
    public Project getSelectedProject () {
        if (jList1.getSelectedIndex () == -1) {
            return null;
        } else {
            return (Project)jList1.getSelectedValue ();
        }
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jScrollPane2 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();

        setLayout(new java.awt.GridBagLayout());

        jLabel1.setText(org.openide.util.NbBundle.getMessage(NoMainProjectWarning.class, "LBL_NoMainProjectWarning_jLabel1"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(12, 12, 6, 12);
        add(jLabel1, gridBagConstraints);

        jLabel2.setDisplayedMnemonic(org.openide.util.NbBundle.getMessage(NoMainProjectWarning.class, "MNE_NoMainProjectWarning_jLabel2").charAt(0));
        jLabel2.setText(org.openide.util.NbBundle.getMessage(NoMainProjectWarning.class, "LBL_NoMainProjectWarning_jLabel2"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(12, 12, 2, 12);
        add(jLabel2, gridBagConstraints);

        jScrollPane2.setMinimumSize(new java.awt.Dimension(100, 200));
        jList1.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jScrollPane2.setViewportView(jList1);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.gridheight = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(6, 12, 12, 12);
        add(jScrollPane2, gridBagConstraints);

    }//GEN-END:initComponents


    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JList jList1;
    private javax.swing.JScrollPane jScrollPane2;
    // End of variables declaration//GEN-END:variables


    public void addChangeListener (ChangeListener l) {
        changeListener = l;
    }
    
    public void removeChangeListener (ChangeListener l) {
        changeListener = null;
    }
    
    private static final class ProjectsListModel extends AbstractListModel {
        
        private Project[] openProjects;

        public ProjectsListModel (Project[] projects) {
            openProjects = projects;
        }

        public synchronized int getSize() {
            return getProjects ().length;
        }

        public synchronized Object getElementAt (int index) {            
            if (index >= 0 && index < getProjects ().length) {
                return getProjects ()[index];
            }
            else {
                return null;
            }
        }

        private Project[] getProjects () {
            if (openProjects == null) {
                return new Project[0];
            } else {
                return openProjects;
            }
        }
    }

    private static final class ProjectsRenderer extends JLabel implements ListCellRenderer {
        ProjectsRenderer () {
            setOpaque (true);
        }
        
        public Component getListCellRendererComponent (JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
            if (value instanceof Project) {
                Project prj = (Project) value;
                setText (ProjectUtils.getInformation (prj).getDisplayName ());
                setIcon (ProjectUtils.getInformation (prj).getIcon ());
            } else {
                setText (value.toString ());
                setIcon (null);
            }
            if (isSelected) {
                setBackground(list.getSelectionBackground());
                setForeground(list.getSelectionForeground());
                //setBorder (BorderFactory.createLineBorder (Color.BLACK));
            }
            else {
                setBackground(list.getBackground());
                setForeground(list.getForeground());
                //setBorder (null);
            }
            return this;
        }
    }

}