/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307, USA
 */

package edu.umd.cs.findbugs.gui2;

import java.awt.Component;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.swing.JCheckBox;
import javax.swing.JFileChooser;
import javax.swing.JPanel;

import edu.umd.cs.findbugs.SystemProperties;

/**
 * All FileChoosers are FBFileChoosers so font size will work
 * 
 * @author Kristin
 * 
 */
public class FBFileChooser extends JFileChooser {

    public FBFileChooser() {
        addHiddenFileCheckBox();
        assert java.awt.EventQueue.isDispatchThread();
        this.setCurrentDirectory(GUISaveState.getInstance().getStarterDirectoryForLoadBugs());
    }

    /**
     * Sets size of font
     * 
     * @param size
     */
    protected void setFontSize(float size) {
        setFont(this.getFont().deriveFont(size));

        setFontSizeHelper(this.getComponents(), size);
    }

    /*
     * Helps above method, runs through all components recursively.
     */
    protected void setFontSizeHelper(Component[] comps, float size) {
        if (comps.length <= 0)
            return;

        for (Component comp : comps) {
            comp.setFont(comp.getFont().deriveFont(size));
            if (comp instanceof Container)
                setFontSizeHelper(((Container) comp).getComponents(), size);
        }
    }

    @Override
    public void addNotify() {
        super.addNotify();
        setFontSize(Driver.getFontSize());

    }

    private static void workAroundJFileChooserBug() {
        // Travis McLeskey
        // http://www.mcleskey.org/bugs.html
        try {
            Object o = javax.swing.UIManager.getBorder("TableHeader.cellBorder");
            Method m = o.getClass().getMethod("setHorizontalShift", new Class[] { int.class });
            m.invoke(o, 0);
        } catch (NoSuchMethodException e) {
            assert true;
        } catch (InvocationTargetException e) {
            assert true;
        } catch (IllegalAccessException e) {
            assert true;
        }
    }

    @Override
    public int showOpenDialog(Component parent) {
        assert java.awt.EventQueue.isDispatchThread();
        int x = super.showOpenDialog(parent);
        if (SystemProperties.getProperty("os.name").startsWith("Mac"))
            workAroundJFileChooserBug();

        GUISaveState.getInstance().setStarterDirectoryForLoadBugs(getCurrentDirectory());

        return x;
    }

    @Override
    public int showSaveDialog(Component parent) {
        assert java.awt.EventQueue.isDispatchThread();
        int x = super.showSaveDialog(parent);
        if (SystemProperties.getProperty("os.name").startsWith("Mac"))
            workAroundJFileChooserBug();

        GUISaveState.getInstance().setStarterDirectoryForLoadBugs(getCurrentDirectory());

        return x;
    }

    @Override
    public int showDialog(Component parent, String approveButtonText) {
        assert java.awt.EventQueue.isDispatchThread();
        int x = super.showDialog(parent, approveButtonText);
        if (SystemProperties.getProperty("os.name").startsWith("Mac"))
            workAroundJFileChooserBug();

        GUISaveState.getInstance().setStarterDirectoryForLoadBugs(getCurrentDirectory());

        return x;
    }
    
    private void addHiddenFileCheckBox() {
        final JCheckBox showHiddenFileCheckBox = new JCheckBox("Show Hidden");
        JPanel accessory = new JPanel();
        accessory.setLayout(new FlowLayout());
        accessory.add(showHiddenFileCheckBox);

        setAccessory(accessory);

        showHiddenFileCheckBox.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                setFileHidingEnabled(!showHiddenFileCheckBox.isSelected());
            }
        });
    }
}
