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/*
* Copyright 2015 Kai Uwe Broulik <kde@privat.broulik.de>
*
* 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) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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, see <http://www.gnu.org/licenses/>
*/
#include "grabwidget.h"
#include <QDebug>
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDBusMetaType>
#include <QDBusPendingCall>
#include <QDBusPendingCallWatcher>
#include <QDBusPendingReply>
#include <QApplication>
#include <QClipboard>
#include <QDesktopWidget>
#include <QEvent>
#include <QMouseEvent>
#include <QScreen>
#include <QWidget>
#include <KWindowSystem>
Q_DECLARE_METATYPE(QColor)
QDBusArgument &operator<< (QDBusArgument &argument, const QColor &color)
{
argument.beginStructure();
argument << color.rgba();
argument.endStructure();
return argument;
}
const QDBusArgument &operator>>(const QDBusArgument &argument, QColor &color)
{
argument.beginStructure();
QRgb rgba;
argument >> rgba;
argument.endStructure();
color = QColor::fromRgba(rgba);
return argument;
}
Grabber::Grabber(QObject *parent)
: QObject(parent)
{
}
Grabber::~Grabber() = default;
void Grabber::setColor(const QColor &color)
{
if (m_color == color) {
return;
}
m_color = color;
emit colorChanged();
}
X11Grabber::X11Grabber(QObject *parent)
: Grabber(parent)
, m_grabWidget(new QWidget(nullptr, Qt::BypassWindowManagerHint))
{
m_grabWidget->move(-5000, -5000);
}
X11Grabber::~X11Grabber()
{
delete m_grabWidget;
}
void X11Grabber::pick()
{
// TODO pretend the mouse went somewhere else to prevent the tooltip from spawning
m_grabWidget->show();
m_grabWidget->installEventFilter(this);
m_grabWidget->grabMouse(Qt::CrossCursor);
}
bool X11Grabber::eventFilter(QObject *watched, QEvent *event)
{
if (watched == m_grabWidget && event->type() == QEvent::MouseButtonRelease) {
m_grabWidget->removeEventFilter(this);
m_grabWidget->hide();
m_grabWidget->releaseMouse();
QMouseEvent *me = static_cast<QMouseEvent *>(event);
if (me->button() == Qt::LeftButton) {
const QPoint pos = me->globalPos();
const QDesktopWidget *desktop = QApplication::desktop();
const QPixmap pixmap = QGuiApplication::screens().at(desktop->screenNumber())->grabWindow(desktop->winId(),
pos.x(), pos.y(), 1, 1);
if (!pixmap.isNull()) {
QImage i = pixmap.toImage();
QColor color(i.pixel(0, 0));
setColor(color);
}
}
}
return QObject::eventFilter(watched, event);
}
KWinWaylandGrabber::KWinWaylandGrabber(QObject *parent)
: Grabber(parent)
{
qDBusRegisterMetaType<QColor>();
}
KWinWaylandGrabber::~KWinWaylandGrabber() = default;
void KWinWaylandGrabber::pick()
{
QDBusMessage msg = QDBusMessage::createMethodCall(QStringLiteral("org.kde.KWin"),
QStringLiteral("/ColorPicker"),
QStringLiteral("org.kde.kwin.ColorPicker"),
QStringLiteral("pick"));
auto call = QDBusConnection::sessionBus().asyncCall(msg);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(call, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this] (QDBusPendingCallWatcher *watcher) {
watcher->deleteLater();
QDBusPendingReply<QColor> reply = *watcher;
if (!reply.isError()) {
setColor(reply.value());
}
}
);
}
GrabWidget::GrabWidget(QObject *parent)
: QObject(parent)
{
if (KWindowSystem::isPlatformX11()) {
m_grabber = new X11Grabber(this);
} else if (KWindowSystem::isPlatformWayland()) {
m_grabber = new KWinWaylandGrabber(this);
}
if (m_grabber) {
connect(m_grabber, &Grabber::colorChanged, this, &GrabWidget::currentColorChanged);
}
}
GrabWidget::~GrabWidget() = default;
QColor GrabWidget::currentColor() const
{
return m_grabber ? m_grabber->color() : QColor();
}
void GrabWidget::pick()
{
if (m_grabber) {
m_grabber->pick();
}
}
void GrabWidget::copyToClipboard(const QString &text)
{
QApplication::clipboard()->setText(text);
}
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