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/*
* Copyright 2012 Canonical Ltd.
*
* This program 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; version 3.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Renato Araujo Oliveira Filho <renato@canonical.com>
*/
#include "qstateaction.h"
#include "qdbusactiongroup.h"
/*!
\qmltype QStateAction
\inherits QAction
\brief A QStateAction implementation to be used with \l QDBusActionGroup
\b {This component is under heavy development.}
This class can be used as a proxy for an action that is exported over D-Bus
\code
QDBusActionGroup {
id: actionGroup
busType: 1
busName: "com.ubuntu.menu"
objectPath: "com/ubuntu/menu/actions"
}
Button {
visible: actionGroup.getAction("button.bvisible").status
}
\endcode
*/
/*! \internal */
QStateAction::QStateAction(QDBusActionGroup *group, const QString &name)
: QObject(group),
m_group(group),
m_name(name)
{
// This keep the code clean
// But maybe we need move the action state control to QActionGroup to optimizations
QObject::connect(m_group, SIGNAL(actionAppear(QString)),
this, SLOT(onActionAppear(QString)));
QObject::connect(m_group, SIGNAL(actionVanish(QString)),
this, SLOT(onActionVanish(QString)));
QObject::connect(m_group, SIGNAL(actionStateChanged(QString,QVariant)),
this, SLOT(onActionStateChanged(QString,QVariant)));
bool isValid = m_group->hasAction(name);
setValid(isValid);
if (isValid) {
setState(m_group->actionState(name));
}
}
/*!
\qmlproperty int QStateAction::state
This property holds the current action state
*/
QVariant QStateAction::state() const
{
return m_state;
}
/*!
\qmlproperty int QStateAction::isValid
This property return if the current Action is valid or not
A valid Action is a action which has a DBus action linked
*/
bool QStateAction::isValid() const
{
return m_valid;
}
/*!
Request for the state of action to be changed to \a paramenter.
This call merely requests a change. The action may refuse to change its state or may change its state to something other than \a paramenter.
*/
void QStateAction::updateState(const QVariant &state)
{
QVariant v = state;
if (v.convert(m_state.type()))
m_group->updateActionState(m_name, v);
}
/*!
Activates the action passing \a parameter.
\a parameter must be the correct type of parameter for the action
*/
void QStateAction::activate(const QVariant ¶meter)
{
m_group->activateAction(m_name, parameter);
}
/*! \internal */
QString QStateAction::name() const
{
return m_name;
}
/*! \internal */
void QStateAction::setValid(bool valid)
{
if (m_valid != valid) {
m_valid = valid;
Q_EMIT validChanged(m_valid);
}
}
/*! \internal */
void QStateAction::setState(const QVariant &state)
{
QVariant v = state;
if (!m_state.isValid() || (v.convert(m_state.type()) && v != m_state)) {
m_state = v;
Q_EMIT stateChanged(m_state);
}
}
/*! \internal */
void QStateAction::onActionAppear(const QString &name)
{
if (m_name == name) {
setState(m_group->actionState(name));
setValid(true);
}
}
/*! \internal */
void QStateAction::onActionVanish(const QString &name)
{
if (m_name == name) {
setState(QVariant());
setValid(false);
}
}
/*! \internal */
void QStateAction::onActionStateChanged(const QString &name, const QVariant &state)
{
if (m_name == name) {
setState(state);
}
}
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