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/*
Actionaz
Copyright (C) 2008-2014 Jonathan Mercier-Ganady
Actionaz 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 3 of the License, or
(at your option) any later version.
Actionaz 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/>.
Contact : jmgr@jmgr.info
*/
#include "choosepositionpushbutton.h"
#include "nativeeventfilteringapplication.h"
#include <QStylePainter>
#include <QStyleOptionButton>
#include <QMouseEvent>
#include <QMessageBox>
#include <QDesktopWidget>
#include <QMainWindow>
#include <QTimer>
#include <QDebug>
#ifdef Q_WS_X11
#include <QX11Info>
#include <X11/Xlib.h>
#endif
#ifdef Q_WS_WIN
#include <Windows.h>
#endif
namespace ActionTools
{
ChoosePositionPushButton::ChoosePositionPushButton(QWidget *parent)
: QPushButton(parent),
mCrossIcon(new QPixmap(":/images/cross.png")),
mSearching(false),
mMainWindow(0)
#ifdef Q_WS_WIN
,mPreviousCursor(NULL)
#endif
{
#ifdef Q_WS_X11
foreach(QWidget *widget, QApplication::topLevelWidgets())
{
if(QMainWindow *mainWindow = qobject_cast<QMainWindow*>(widget))
{
mMainWindow = mainWindow;
break;
}
}
#endif
setToolTip(tr("Target a position by clicking this button, moving the cursor to the desired position and releasing the mouse button."));
}
ChoosePositionPushButton::~ChoosePositionPushButton()
{
if(mSearching)
stopMouseCapture();
nativeEventFilteringApp->removeNativeEventFilter(this);
delete mCrossIcon;
}
void ChoosePositionPushButton::paintEvent(QPaintEvent *event)
{
if(mSearching)
{
QPushButton::paintEvent(event);
return;
}
QStylePainter painter(this);
QStyleOptionButton option;
initStyleOption(&option);
painter.drawControl(QStyle::CE_PushButton, option);
painter.drawItemPixmap(rect(), Qt::AlignCenter, *mCrossIcon);
}
void ChoosePositionPushButton::mousePressEvent(QMouseEvent *event)
{
QPushButton::mousePressEvent(event);
mSearching = true;
update();
#ifdef Q_WS_X11
if(mMainWindow)
mMainWindow->showMinimized();
#endif
#ifdef Q_WS_WIN
foreach(QWidget *widget, qApp->topLevelWidgets())
widget->setWindowOpacity(0.0f);
#endif
QCursor newCursor(*mCrossIcon);
emit chooseStarted();
#ifdef Q_WS_WIN
mPreviousCursor = SetCursor(newCursor.handle());
#endif
#ifdef Q_WS_X11
nativeEventFilteringApp->installNativeEventFilter(this);
if(XGrabPointer(QX11Info::display(), DefaultRootWindow(QX11Info::display()), True, ButtonReleaseMask, GrabModeAsync, GrabModeAsync,
None, newCursor.handle(), CurrentTime) != GrabSuccess)
{
QMessageBox::warning(this, tr("Choose a window"), tr("Unable to grab the pointer."));
event->ignore();
}
#endif
}
#ifdef Q_WS_WIN
void ChoosePositionPushButton::mouseReleaseEvent(QMouseEvent *event)
{
QPushButton::mouseReleaseEvent(event);
emit positionChosen(event->globalPos());
stopMouseCapture();
}
#endif
#ifdef Q_WS_X11
bool ChoosePositionPushButton::x11EventFilter(XEvent *event)
{
if(event->type == ButtonRelease)
{
emit positionChosen(QCursor::pos());
stopMouseCapture();
return true;
}
return false;
}
#endif
void ChoosePositionPushButton::stopMouseCapture()
{
mSearching = false;
update();
#ifdef Q_WS_WIN
if(mPreviousCursor)
SetCursor(mPreviousCursor);
foreach(QWidget *widget, qApp->topLevelWidgets())
widget->setWindowOpacity(1.0f);
#endif
#ifdef Q_WS_X11
XUngrabPointer(QX11Info::display(), CurrentTime);
nativeEventFilteringApp->removeNativeEventFilter(this);
if(mMainWindow)
mMainWindow->showNormal();
#endif
}
}
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