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lxqt-panel-packaging/plugin-desktopswitch/desktopswitch.cpp

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/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* LXDE-Qt - a lightweight, Qt based, desktop toolset
* http://razor-qt.org
*
* Copyright: 2011 Razor team
* Authors:
* Petr Vanek <petr@scribus.info>
*
* This program or 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include <QButtonGroup>
#include <QToolButton>
#include <QWheelEvent>
#include <QtDebug>
#include <QSignalMapper>
#include <QTimer>
#include <lxqt-globalkeys.h>
#include <LXQt/GridLayout>
#include <KWindowSystem/KWindowSystem>
#include <QX11Info>
#include <cmath>
#include "desktopswitch.h"
#include "desktopswitchbutton.h"
#include "desktopswitchconfiguration.h"
#define DEFAULT_SHORTCUT_TEMPLATE QStringLiteral("Control+F%1")
DesktopSwitch::DesktopSwitch(const ILXQtPanelPluginStartupInfo &startupInfo) :
QObject(),
ILXQtPanelPlugin(startupInfo),
m_pSignalMapper(new QSignalMapper(this)),
m_desktopCount(KWindowSystem::numberOfDesktops()),
mRows(-1),
mDesktops(new NETRootInfo(QX11Info::connection(), NET::NumberOfDesktops | NET::CurrentDesktop | NET::DesktopNames, NET::WM2DesktopLayout)),
mLabelType(static_cast<DesktopSwitchButton::LabelType>(-1))
{
m_buttons = new QButtonGroup(this);
connect (m_pSignalMapper, SIGNAL(mapped(int)), this, SLOT(setDesktop(int)));
mLayout = new LXQt::GridLayout(&mWidget);
mWidget.setLayout(mLayout);
settingsChanged();
onCurrentDesktopChanged(KWindowSystem::currentDesktop());
QTimer::singleShot(0, this, SLOT(registerShortcuts()));
connect(m_buttons, SIGNAL(buttonClicked(int)), this, SLOT(setDesktop(int)));
connect(KWindowSystem::self(), SIGNAL(numberOfDesktopsChanged(int)), SLOT(onNumberOfDesktopsChanged(int)));
connect(KWindowSystem::self(), SIGNAL(currentDesktopChanged(int)), SLOT(onCurrentDesktopChanged(int)));
connect(KWindowSystem::self(), SIGNAL(desktopNamesChanged()), SLOT(onDesktopNamesChanged()));
connect(KWindowSystem::self(), static_cast<void (KWindowSystem::*)(WId, NET::Properties, NET::Properties2)>(&KWindowSystem::windowChanged),
this, &DesktopSwitch::onWindowChanged);
}
void DesktopSwitch::registerShortcuts()
{
// Register shortcuts to change desktop
GlobalKeyShortcut::Action * gshortcut;
QString path;
QString description;
for (int i = 0; i < 12; ++i)
{
path = QString("/panel/%1/desktop_%2").arg(settings()->group()).arg(i + 1);
description = tr("Switch to desktop %1").arg(i + 1);
gshortcut = GlobalKeyShortcut::Client::instance()->addAction(QStringLiteral(), path, description, this);
if (nullptr != gshortcut)
{
m_keys << gshortcut;
connect(gshortcut, &GlobalKeyShortcut::Action::registrationFinished, this, &DesktopSwitch::shortcutRegistered);
connect(gshortcut, SIGNAL(activated()), m_pSignalMapper, SLOT(map()));
m_pSignalMapper->setMapping(gshortcut, i);
}
}
}
void DesktopSwitch::shortcutRegistered()
{
GlobalKeyShortcut::Action * const shortcut = qobject_cast<GlobalKeyShortcut::Action*>(sender());
disconnect(shortcut, &GlobalKeyShortcut::Action::registrationFinished, this, &DesktopSwitch::shortcutRegistered);
const int i = m_keys.indexOf(shortcut);
Q_ASSERT(-1 != i);
if (shortcut->shortcut().isEmpty())
{
shortcut->changeShortcut(DEFAULT_SHORTCUT_TEMPLATE.arg(i + 1));
}
}
void DesktopSwitch::onWindowChanged(WId id, NET::Properties properties, NET::Properties2 properties2)
{
if (properties.testFlag(NET::WMState))
{
KWindowInfo info = KWindowInfo(id, NET::WMDesktop | NET::WMState);
int desktop = info.desktop();
if (!info.valid() || info.onAllDesktops())
return;
else
{
DesktopSwitchButton *button = static_cast<DesktopSwitchButton *>(m_buttons->button(desktop - 1));
if(button)
button->setUrgencyHint(id, info.hasState(NET::DemandsAttention));
}
}
}
void DesktopSwitch::refresh()
{
QList<QAbstractButton*> btns = m_buttons->buttons();
int i = 0;
const int current_cnt = btns.count();
const int border = qMin(btns.count(), m_desktopCount);
//update existing buttons
for ( ; i < border; ++i)
{
((DesktopSwitchButton*)m_buttons->button(i))->update(i, mLabelType,
KWindowSystem::desktopName(i + 1).isEmpty() ?
tr("Desktop %1").arg(i + 1) :
KWindowSystem::desktopName(i + 1));
}
//create new buttons (if neccessary)
QAbstractButton *b;
for ( ; i < m_desktopCount; ++i)
{
b = new DesktopSwitchButton(&mWidget, i, mLabelType,
KWindowSystem::desktopName(i+1).isEmpty() ?
tr("Desktop %1").arg(i+1) :
KWindowSystem::desktopName(i+1));
mWidget.layout()->addWidget(b);
m_buttons->addButton(b, i);
}
//delete unneeded buttons (if neccessary)
for ( ; i < current_cnt; ++i)
{
b = m_buttons->buttons().last();
m_buttons->removeButton(b);
mWidget.layout()->removeWidget(b);
delete b;
}
}
DesktopSwitch::~DesktopSwitch()
{
}
void DesktopSwitch::setDesktop(int desktop)
{
KWindowSystem::setCurrentDesktop(desktop + 1);
}
void DesktopSwitch::onNumberOfDesktopsChanged(int count)
{
qDebug() << "Desktop count changed from" << m_desktopCount << "to" << count;
m_desktopCount = count;
refresh();
}
void DesktopSwitch::onCurrentDesktopChanged(int current)
{
QAbstractButton *button = m_buttons->button(current - 1);
if (button)
button->setChecked(true);
}
void DesktopSwitch::onDesktopNamesChanged()
{
refresh();
}
void DesktopSwitch::settingsChanged()
{
int value = settings()->value("rows", 1).toInt();
if (mRows != value)
{
mRows = value;
realign();
}
value = settings()->value("labelType", DesktopSwitchButton::LABEL_TYPE_NUMBER).toInt();
if (mLabelType != static_cast<DesktopSwitchButton::LabelType>(value))
{
mLabelType = static_cast<DesktopSwitchButton::LabelType>(value);
refresh();
}
}
void DesktopSwitch::realign()
{
int columns = static_cast<int>(ceil(static_cast<float>(m_desktopCount) / mRows));
mLayout->setEnabled(false);
if (panel()->isHorizontal())
{
mLayout->setRowCount(mRows);
mLayout->setColumnCount(0);
mDesktops->setDesktopLayout(NET::OrientationHorizontal, columns, mRows, NET::DesktopLayoutCornerTopLeft);
}
else
{
mLayout->setColumnCount(mRows);
mLayout->setRowCount(0);
mDesktops->setDesktopLayout(NET::OrientationHorizontal, mRows, columns, NET::DesktopLayoutCornerTopLeft);
}
mLayout->setEnabled(true);
}
QDialog *DesktopSwitch::configureDialog()
{
return new DesktopSwitchConfiguration(settings());
}
DesktopSwitchWidget::DesktopSwitchWidget():
QFrame(),
m_mouseWheelThresholdCounter(0)
{
}
void DesktopSwitchWidget::wheelEvent(QWheelEvent *e)
{
// Without some sort of threshold which has to be passed, scrolling is too sensitive
m_mouseWheelThresholdCounter -= e->delta();
// If the user hasn't scrolled far enough in one direction (positive or negative): do nothing
if(abs(m_mouseWheelThresholdCounter) < 100)
return;
int max = KWindowSystem::numberOfDesktops();
int delta = e->delta() < 0 ? 1 : -1;
int current = KWindowSystem::currentDesktop() + delta;
if (current > max){
current = 1;
}
else if (current < 1)
current = max;
m_mouseWheelThresholdCounter = 0;
KWindowSystem::setCurrentDesktop(current);
}