/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package sun.awt.X11;

import java.awt.*;

import java.awt.peer.*;

import java.awt.event.MouseEvent;

import java.awt.event.FocusEvent;

import java.awt.event.KeyEvent;

import java.awt.event.ActionEvent;

import javax.swing.plaf.basic.*;

import javax.swing.SwingUtilities;

import javax.swing.SwingConstants;

public class XButtonPeer extends XComponentPeer implements ButtonPeer {

    boolean pressed;

    boolean armed;

    private Insets focusInsets;

    private Insets borderInsets;

    private Insets contentAreaInsets;

    private final static String propertyPrefix = "Button" + ".";

    protected Color focusColor =  SystemColor.windowText;

    private boolean disposed = false;

    String label;

    protected String getPropertyPrefix() {

        return propertyPrefix;

    }

    void preInit(XCreateWindowParams params) {

        super.preInit(params);

        borderInsets = new Insets(2,2,2,2);

        focusInsets = new Insets(0,0,0,0);

        contentAreaInsets = new Insets(3,3,3,3);

    }

    public  XButtonPeer(Button target) {

        super(target);

        pressed = false;

        armed = false;

        label = target.getLabel();

        updateMotifColors(getPeerBackground());

    }

    public  void dispose() {

        synchronized (target)

        {

            disposed = true;

        }

        super.dispose();

    }

    public boolean isFocusable() {

        return true;

    }

    public void  setLabel(java.lang.String label) {

        this.label = label;

        repaint();

    }

    public void paint(Graphics g) {

        paint(g,target);

    }

    public void setBackground(Color c) {

        updateMotifColors(c);

        super.setBackground(c);

    }

    void handleJavaMouseEvent(MouseEvent e) {

        super.handleJavaMouseEvent(e);

        int id = e.getID();

        switch (id) {

          case MouseEvent.MOUSE_PRESSED:

              if (XToolkit.isLeftMouseButton(e) ) {

                  Button b = (Button) e.getSource();

                  if(b.contains(e.getX(), e.getY())) {

                      if (!isEnabled()) {

                          // Disabled buttons ignore all input...

                          return;

                      }

                      pressed = true;

                      armed = true;

                      repaint();

                  }

              }

              break;

          case MouseEvent.MOUSE_RELEASED:

              if (XToolkit.isLeftMouseButton(e)) {

                  if (armed)

                  {

                      action(e.getWhen(),e.getModifiers());

                  }

                  pressed = false;

                  armed = false;

                  repaint();

              }

              break;

          case  MouseEvent.MOUSE_ENTERED:

              if (pressed)

                  armed = true;

//                 repaint();

              break;

          case MouseEvent.MOUSE_EXITED:

              armed = false;

//                 repaint();

              break;

        }

    }

    // NOTE: This method is called by privileged threads.

    //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!

    public void action(final long when, final int modifiers) {

        postEvent(new ActionEvent(target, ActionEvent.ACTION_PERFORMED,

                                  ((Button)target).getActionCommand(),

                                  when, modifiers));

    }

    public void focusGained(FocusEvent e) {

        super.focusGained(e);

        repaint();

    }

    public void focusLost(FocusEvent e) {

        super.focusLost(e);

        repaint();

    }

    void handleJavaKeyEvent(KeyEvent e) {

        int id = e.getID();

        switch (id) {

          case KeyEvent.KEY_PRESSED:

              if (e.getKeyCode() == KeyEvent.VK_SPACE)

              {

                  pressed=true;

                  armed=true;

                  repaint();

                  action(e.getWhen(),e.getModifiers());

              }

              break;

          case KeyEvent.KEY_RELEASED:

              if (e.getKeyCode() == KeyEvent.VK_SPACE)

              {

                  pressed = false;

                  armed = false;

                  repaint();

              }

              break;

        }

    }

    public Dimension getMinimumSize() {

        FontMetrics fm = getFontMetrics(getPeerFont());

        if ( label == null ) {

            label = "";

        }

        return new Dimension(fm.stringWidth(label) + 14,

                             fm.getHeight() + 8);

    }

    /**

     * DEPRECATED

     */

    public Dimension minimumSize() {

        return getMinimumSize();

    }

    /*

       This method is called from Toolkit Thread and so it should not call any client code

    */

    public void paint(Graphics g, Component c)

    {

        if (!disposed && (g != null))

        {

            Dimension size = getPeerSize();

            g.setColor( getPeerBackground() );   /* erase the existing button remains */

            g.fillRect(0,0, size.width , size.height);

            paintBorder(g,borderInsets.left,

                        borderInsets.top,

                        size.width-(borderInsets.left+borderInsets.right),

                        size.height-(borderInsets.top+borderInsets.bottom));

            FontMetrics fm = g.getFontMetrics();

            Rectangle textRect,iconRect,viewRect;

            textRect = new Rectangle();

            viewRect = new Rectangle();

            iconRect = new Rectangle();

            viewRect.width = size.width - (contentAreaInsets.left+contentAreaInsets.right);

            viewRect.height = size.height - (contentAreaInsets.top+contentAreaInsets.bottom);

            viewRect.x = contentAreaInsets.left;

            viewRect.y = contentAreaInsets.right;

            String llabel = (label != null) ? label : "";

            // layout the text and icon

            String text = SwingUtilities.layoutCompoundLabel(

                                                             fm, llabel, null,

                                                             SwingConstants.CENTER, SwingConstants.CENTER,

                                                             SwingConstants.CENTER, SwingConstants.CENTER,

                                                             viewRect, iconRect, textRect, 0);

            Font f = getPeerFont();

            g.setFont(f);

            // perform UI specific press action, e.g. Windows L&F shifts text

            if (pressed && armed) {

                paintButtonPressed(g,target);

            }

            paintText(g, target, textRect, text);

            if (hasFocus()) {

                // paint UI specific focus

                paintFocus(g,focusInsets.left,

                           focusInsets.top,

                           size.width-(focusInsets.left+focusInsets.right)-1,

                           size.height-(focusInsets.top+focusInsets.bottom)-1);

            }

        }

        flush();

    }

    public void paintBorder(Graphics g, int x, int y, int w, int h) {

        drawMotif3DRect(g, x, y, w-1, h-1, pressed);

    }

    public void setFont(Font f) {

        super.setFont(f);

        target.repaint();

    }

    protected void paintFocus(Graphics g, int x, int y, int w, int h){

        g.setColor(focusColor);

        g.drawRect(x,y,w,h);

    }

    protected void paintButtonPressed(Graphics g, Component b) {

        Dimension size = getPeerSize();

        g.setColor(selectColor);

        g.fillRect(contentAreaInsets.left,

                   contentAreaInsets.top,

                   size.width-(contentAreaInsets.left+contentAreaInsets.right),

                   size.height-(contentAreaInsets.top+contentAreaInsets.bottom));

    }

    protected void paintText(Graphics g, Component c, Rectangle textRect, String text) {

        FontMetrics fm = g.getFontMetrics();

        int mnemonicIndex = -1;

        /* Draw the Text */

        if(isEnabled()) {

            /*** paint the text normally */

            g.setColor(getPeerForeground());

            BasicGraphicsUtils.drawStringUnderlineCharAt(g,text,mnemonicIndex , textRect.x , textRect.y + fm.getAscent() );

        }

        else {

            /*** paint the text disabled ***/

            g.setColor(getPeerBackground().brighter());

            BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex,

                                                         textRect.x, textRect.y + fm.getAscent());

            g.setColor(c.getBackground().darker());

            BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex,

                                                         textRect.x - 1, textRect.y + fm.getAscent() - 1);

        }

    }

}