devicebutton.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
** 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.
** 
** A copy of the GNU GPL license version 2 is included in this package as 
** LICENSE.GPL.
**
** 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.
**
** In addition, as a special exception Trolltech gives permission to link
** the code of this program with Qtopia applications copyrighted, developed
** and distributed by Trolltech under the terms of the Qtopia Personal Use
** License Agreement. You must comply with the GNU General Public License
** in all respects for all of the code used other than the applications
** licensed under the Qtopia Personal Use License Agreement. If you modify
** this file, you may extend this exception to your version of the file,
** but you are not obligated to do so. If you do not wish to do so, delete
** this exception statement from your version.
** 
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include <qtopia/resource.h>
#include <qpixmap.h>
#include <qstring.h>
#include "devicebutton.h"

/*! \class DeviceButton devicebutton.h
    \brief The DeviceButton class represents a physical user mappable button on a Qtopia device.

    This class represents a physical button on a Qtopia device.    A
    device may have "user programmable" buttons.
    The location and number of buttons will vary from device to
    device.    userText() and pixmap() may be used to describe this button
    to the user in help documentation.

  First availability: Qtopia 1.6

    \ingroup qtopiaemb
*/

/*!
  Constructs DeviceButton.
*/
DeviceButton::DeviceButton()
{
}

/*!
  Destructs DeviceButton.
*/
DeviceButton::~DeviceButton()
{
}

/*!
  Returns the button's keycode.
 */
ushort DeviceButton::keycode() const
{
    return m_Keycode;
}


/*!
  Returns a human readable, translated description of the button.
 */
QString DeviceButton::userText() const
{
    return m_UserText;
}

/*!
  Returns the pixmap for this button.    If there isn't one
  it will return an empty (null) pixmap.
 */
QPixmap DeviceButton::pixmap() const
{
    if ( m_Pixmap.isNull() && !m_PixmapName.isEmpty() ) {
	DeviceButton *that = (DeviceButton *)this;
	that->m_Pixmap = Resource::loadPixmap( m_PixmapName );
    }
    return m_Pixmap;
}

/*!
  Returns the user assigned action for when this button is pressed.
 */
ServiceRequest DeviceButton::pressedAction() const
{
    return m_PressedAction;
}

/*!
  Returns the user assigned action for when this button is pressed
  and held.
 */
ServiceRequest DeviceButton::heldAction() const
{
    return m_HeldAction;
}

/*!
  Sets the keycode \a keycode that is set when the button is pressed.
*/
void DeviceButton::setKeycode(ushort keycode)
{
    m_Keycode = keycode;
}

/*!
  Sets the human readable, translated description of the button to \a text.
*/
void DeviceButton::setUserText(const QString& text)
{
    m_UserText = text;
}

/*!
  Set the pixmap for this button to the Resource names \a pmn.
  This will ideally match the label on the physical button.
*/
void DeviceButton::setPixmap(const QString& pmn)
{
    if ( !m_PixmapName.isEmpty() )
	m_Pixmap = QPixmap();
    m_PixmapName = pmn;
}

/*!
  Set the action to be performed when this button is pressed to \a action.
*/
void DeviceButton::setPressedAction(const ServiceRequest& action)
{
    m_PressedAction = action;
}

/*!
  Set the action to be performed when this button is pressed and
  held to \a action.
*/
void DeviceButton::setHeldAction(const ServiceRequest& action)
{
    m_HeldAction = action;
}

/*!
  Returns TRUE if this DeviceButton is equal to \a e.
*/
bool DeviceButton::operator==(const DeviceButton &e) const
{
    return ((keycode() == e.keycode()) &&
	    (userText() == e.userText()) &&
	    (pressedAction() == e.pressedAction()) &&
	    (heldAction() == e.heldAction()));
}