qmmenubutton.cpp

可以播放MP3,wma等文件格式的播放器

/* qmmenubutton.cpp
 *
 * $Id: qmmenubutton.cpp,v 1.14 2002/03/07 03:44:16 mariuss Exp $
 *
 * Apollo sound player: http://www.apolloplayer.org
 * Copyright(C) 2000-2002 Apollo Team.  See CREDITS file.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The GNU General Public License is also available online at:
 *
 * http://www.gnu.org/copyleft/gpl.html
 */

#include "qmmenubutton.h"

#include <iostream>

#include <qevent.h>
#include <qiconset.h>
#include <qpainter.h>
#include <qpopupmenu.h>
#include <qstyle.h>

/**
 * @file qmmenubutton.cpp
 * @brief For creating buttons in toolbars that open a popup menu
*/

/*!
  \class QmMenuButton qmmenubutton.h
  \brief For creating buttons in toolbars that open a popup menu.

  This class acts as a QToolButton, except that it adds a small down
  arrow of the right of the text/icon.  Clicking the arrow will emit
  menuClicked() signal, while clicking on the icon will emit
  iconClicked().

  By passing the menu object to the constructor, the menu will be
  brought up by the button.
*/

/*! \fn void QmMenuButton::menuClicked()
  Emitted when the menu part is clicked.  This shouldn't typically
  be needed to show the menu as the menu will be popped up
  for you.
*/

/*! \fn void QmMenuButton::iconClicked()
  Emitted when the icon part is clicked.
*/

/*!
  Constructs a new menu button.
*/

QmMenuButton::QmMenuButton(
	const QIconSet &s,
	const QString &textLabel,
	QWidget *parent,
	QPopupMenu *menu,
	const char *name)
	: QToolButton(parent, name),
	  m_MouseOver(false),
	  m_pMenu(menu)
{
#ifdef USING_QT3
    setIconSet( s );
#else    
	setOnIconSet( s );
#endif    
	setTextLabel( textLabel );
	
	m_PixmapWidth = s.pixmap(QIconSet::Small, QIconSet::Normal).width();
	setFixedWidth( m_PixmapWidth + 19 ); // space + arrowwidth + space + border
}


/*!
  Destroys the menu button.
*/

QmMenuButton::~QmMenuButton()
{
}


/*!
  Reimplemented to draw down arrow and separator between icon and arrow.
 */

void
QmMenuButton::drawButton(
	QPainter *p)
{
#ifdef USING_QT3
#else    
    style().drawToolButton( this, p );
#endif
	
	QPixmap pixmap = onIconSet().pixmap(QIconSet::Small, QIconSet::Normal);
	p->drawPixmap(3, 3, pixmap);

#ifdef USING_QT3
    style().drawPrimitive(QStyle::PE_ArrowDown, p,
                          QRect(pixmap.width() + 10, height() / 2 - 2,
                                5, 5),
                          colorGroup(),
                          QStyle::Style_Enabled);
#else    
	style().drawArrow(p, DownArrow, true,
					  pixmap.width() + 10,
					  height() / 2 - 2, 5, 5,
					  colorGroup(), isEnabled());
#endif    
	
	if(m_MouseOver)
	{
		if(isDown())
		{
			p->setPen(colorGroup().light());
			p->drawLine(pixmap.width() + 5, 1, pixmap.width() + 5, height() - 2);
			p->setPen(colorGroup().dark());
			p->drawLine(pixmap.width() + 6, 1, pixmap.width() + 6, height() - 2);
		}
		else
		{
			p->setPen(colorGroup().dark());
			p->drawLine(pixmap.width() + 5, 1, pixmap.width() + 5, height() - 2);
			p->setPen(colorGroup().light());
			p->drawLine(pixmap.width() + 6, 1, pixmap.width() + 6, height() - 2);
		}
	}
}


/*!
  Keeps state so that the button is drawn correctly.
 */

void
QmMenuButton::enterEvent(
	QEvent *e)
{
	m_MouseOver = true;
	QToolButton::enterEvent(e);
}


/*!
  Keeps state so that the button is drawn correctly.
 */

void
QmMenuButton::leaveEvent(
	QEvent *e)
{
	m_MouseOver = false;
	QToolButton::leaveEvent(e);
}


/*!
  Emits menuClicked() is the arrow region was clicked.  If the
  icon region was clicked, iconClicked() will be emitted.
 */

void
QmMenuButton::mouseReleaseEvent(
	QMouseEvent *e)
{
	if(m_MouseOver)
	{
		if(e->x() > m_PixmapWidth + 6)
		{
			emit menuClicked();
			m_pMenu->popup(mapToGlobal(QPoint(0, height())));
		}
		else
			emit iconClicked();
	}

	QToolButton::mouseReleaseEvent(e);
}