/*
 * Jalview - A Sequence Alignment Editor and Viewer (Version 2.8.2b1)
 * Copyright (C) 2014 The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License 
 * as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *  
 * Jalview is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty 
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
 * PURPOSE.  See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.appletgui;

import jalview.util.MessageManager;

import java.awt.*;
import java.awt.event.*;

public class FontChooser extends Panel implements ActionListener,
        ItemListener
{
  AlignmentPanel ap;

  TreePanel tp;

  Font oldFont;

  boolean init = true;

  Frame frame;

  public FontChooser(TreePanel tp)
  {
    try
    {
      jbInit();
    } catch (Exception e)
    {
      e.printStackTrace();
    }

    this.tp = tp;
    oldFont = tp.getTreeFont();
    init();
  }

  public FontChooser(AlignmentPanel ap)
  {
    try
    {
      jbInit();
    } catch (Exception e)
    {
      e.printStackTrace();
    }

    this.ap = ap;
    oldFont = ap.av.getFont();
    init();
  }

  void init()
  {
    String fonts[] = Toolkit.getDefaultToolkit().getFontList();
    for (int i = 0; i < fonts.length; i++)
    {
      fontName.addItem(fonts[i]);
    }

    for (int i = 1; i < 31; i++)
    {
      fontSize.addItem(i + "");
    }

    fontStyle.addItem("plain");
    fontStyle.addItem("bold");
    fontStyle.addItem("italic");

    fontName.select(oldFont.getName());
    fontSize.select(oldFont.getSize() + "");
    fontStyle.select(oldFont.getStyle());

    Frame frame = new Frame();
    this.frame = frame;
    frame.add(this);
    jalview.bin.JalviewLite.addFrame(frame,
            MessageManager.getString("action.change_font"), 440, 115);

    init = false;
  }

  public void actionPerformed(ActionEvent evt)
  {
    if (evt.getSource() == ok)
    {
      ok_actionPerformed();
    }
    else if (evt.getSource() == cancel)
    {
      cancel_actionPerformed();
    }
  }

  public void itemStateChanged(ItemEvent evt)
  {
    if (evt.getSource() == fontName)
    {
      fontName_actionPerformed();
    }
    else if (evt.getSource() == fontSize)
    {
      fontSize_actionPerformed();
    }
    else if (evt.getSource() == fontStyle)
    {
      fontStyle_actionPerformed();
    }
  }

  protected void ok_actionPerformed()
  {
    frame.setVisible(false);
    if (ap != null)
    {
      if (ap.getOverviewPanel() != null)
      {
        ap.getOverviewPanel().updateOverviewImage();
      }
    }

  }

  protected void cancel_actionPerformed()
  {
    if (ap != null)
    {
      ap.av.setFont(oldFont);
      ap.paintAlignment(true);
    }
    else if (tp != null)
    {
      tp.setTreeFont(oldFont);
      tp.treeCanvas.repaint();
    }

    fontName.select(oldFont.getName());
    fontSize.select(oldFont.getSize() + "");
    fontStyle.select(oldFont.getStyle());

    frame.setVisible(false);
  }

  private Font lastSelected = null;

  private int lastSelStyle = 0;

  private int lastSelSize = 0;

  /**
   * DOCUMENT ME!
   */
  void changeFont()
  {
    if (lastSelected == null)
    {
      // initialise with original font
      lastSelected = oldFont;
      lastSelSize = oldFont.getSize();
      lastSelStyle = oldFont.getStyle();
    }

    Font newFont = new Font(fontName.getSelectedItem().toString(),
            fontStyle.getSelectedIndex(), Integer.parseInt(fontSize
                    .getSelectedItem().toString()));
    FontMetrics fm = getGraphics().getFontMetrics(newFont);
    double mw = fm.getStringBounds("M", getGraphics()).getWidth(), iw = fm
            .getStringBounds("I", getGraphics()).getWidth();
    if (mw < 1 || iw < 1)
    {
      // TODO: JAL-1100
      fontName.select(lastSelected.getName());
      fontStyle.select(lastSelStyle);
      fontSize.select("" + lastSelSize);
      JVDialog d = new JVDialog(this.frame,
              MessageManager.getString("label.invalid_font"), true, 350,
              200);
      Panel mp = new Panel();
      d.cancel.setVisible(false);
      mp.setLayout(new FlowLayout());
      mp.add(new Label(
              "Font doesn't have letters defined\nso cannot be used\nwith alignment data."));
      d.setMainPanel(mp);
      d.setVisible(true);
      return;
    }
    if (tp != null)
    {
      tp.setTreeFont(newFont);
    }
    else if (ap != null)
    {
      ap.av.setFont(newFont);
      ap.fontChanged();
    }
    // remember last selected
    lastSelected = newFont;
  }

  protected void fontName_actionPerformed()
  {
    if (init)
    {
      return;
    }
    changeFont();
  }

  protected void fontSize_actionPerformed()
  {
    if (init)
    {
      return;
    }
    changeFont();
  }

  protected void fontStyle_actionPerformed()
  {
    if (init)
    {
      return;
    }
    changeFont();
  }

  Label label1 = new Label();

  protected Choice fontSize = new Choice();

  protected Choice fontStyle = new Choice();

  Label label2 = new Label();

  Label label3 = new Label();

  protected Choice fontName = new Choice();

  Button ok = new Button();

  Button cancel = new Button();

  Panel panel1 = new Panel();

  Panel panel2 = new Panel();

  Panel panel3 = new Panel();

  BorderLayout borderLayout1 = new BorderLayout();

  BorderLayout borderLayout2 = new BorderLayout();

  BorderLayout borderLayout3 = new BorderLayout();

  Panel panel4 = new Panel();

  Panel panel5 = new Panel();

  BorderLayout borderLayout4 = new BorderLayout();

  private void jbInit() throws Exception
  {
    label1.setFont(new java.awt.Font("Verdana", 0, 11));
    label1.setAlignment(Label.RIGHT);
    label1.setText(MessageManager.getString("label.font"));
    this.setLayout(borderLayout4);
    fontSize.setFont(new java.awt.Font("Verdana", 0, 11));
    fontSize.addItemListener(this);
    fontStyle.setFont(new java.awt.Font("Verdana", 0, 11));
    fontStyle.addItemListener(this);
    label2.setAlignment(Label.RIGHT);
    label2.setFont(new java.awt.Font("Verdana", 0, 11));
    label2.setText(MessageManager.getString("label.size"));
    label3.setAlignment(Label.RIGHT);
    label3.setFont(new java.awt.Font("Verdana", 0, 11));
    label3.setText(MessageManager.getString("label.style"));
    fontName.setFont(new java.awt.Font("Verdana", 0, 11));
    fontName.addItemListener(this);
    ok.setFont(new java.awt.Font("Verdana", 0, 11));
    ok.setLabel(MessageManager.getString("action.ok"));
    ok.addActionListener(this);
    cancel.setFont(new java.awt.Font("Verdana", 0, 11));
    cancel.setLabel(MessageManager.getString("action.cancel"));
    cancel.addActionListener(this);
    this.setBackground(Color.white);
    panel1.setLayout(borderLayout1);
    panel2.setLayout(borderLayout3);
    panel3.setLayout(borderLayout2);
    panel5.setBackground(Color.white);
    panel4.setBackground(Color.white);
    panel1.setBackground(Color.white);
    panel2.setBackground(Color.white);
    panel3.setBackground(Color.white);
    panel1.add(label1, BorderLayout.WEST);
    panel1.add(fontName, BorderLayout.CENTER);
    panel5.add(panel1, null);
    panel5.add(panel3, null);
    panel5.add(panel2, null);
    panel2.add(label3, BorderLayout.WEST);
    panel2.add(fontStyle, BorderLayout.CENTER);
    panel3.add(label2, BorderLayout.WEST);
    panel3.add(fontSize, BorderLayout.CENTER);
    this.add(panel4, BorderLayout.SOUTH);
    panel4.add(ok, null);
    panel4.add(cancel, null);
    this.add(panel5, BorderLayout.CENTER);
  }

}