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/*******************************************************************************
* Copyright (C) 2008 by Fredrik Höglund <[email protected]> *
* Copyright (C) 2008 by Konstantin Heil <[email protected]> *
* Copyright (C) 2009 by Peter Penz <[email protected]> *
* *
* 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. *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
*******************************************************************************/
#include "ktooltipwindow_p.h"
#include <kcolorscheme.h>
#include <QPainter>
#include <QVBoxLayout>
#ifdef Q_WS_X11
#include <QX11Info>
#endif
KToolTipWindow::KToolTipWindow(QWidget* content) :
QWidget(0)
{
setAttribute(Qt::WA_TranslucentBackground);
setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
QVBoxLayout* layout = new QVBoxLayout(this);
layout->addWidget(content);
}
KToolTipWindow::~KToolTipWindow()
{
}
void KToolTipWindow::paintEvent(QPaintEvent* event)
{
Q_UNUSED(event);
QPainter painter(this);
QColor toColor = palette().brush(QPalette::ToolTipBase).color();
QColor fromColor = KColorScheme::shade(toColor, KColorScheme::LightShade, 0.2);
#ifdef Q_WS_X11
const bool haveAlphaChannel = QX11Info::isCompositingManagerRunning();
#else
const bool haveAlphaChannel = false;
#endif
if (haveAlphaChannel) {
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(0.5, 0.5);
toColor.setAlpha(220);
fromColor.setAlpha(220);
}
QLinearGradient gradient(QPointF(0.0, 0.0), QPointF(0.0, height()));
gradient.setColorAt(0.0, fromColor);
gradient.setColorAt(1.0, toColor);
painter.setPen(Qt::NoPen);
painter.setBrush(gradient);
const QRect rect(0, 0, width(), height());
const qreal radius = 5;
QPainterPath path;
path.moveTo(rect.left(), rect.top() + radius);
arc(path, rect.left() + radius, rect.top() + radius, radius, 180, -90);
arc(path, rect.right() - radius, rect.top() + radius, radius, 90, -90);
arc(path, rect.right() - radius, rect.bottom() - radius, radius, 0, -90);
arc(path, rect.left() + radius, rect.bottom() - radius, radius, 270, -90);
path.closeSubpath();
painter.drawPath(path);
}
void KToolTipWindow::arc(QPainterPath& path, qreal cx, qreal cy, qreal radius, qreal angle, qreal sweeplength)
{
path.arcTo(cx-radius, cy-radius, radius * 2, radius * 2, angle, sweeplength);
}
#include "ktooltipwindow_p.moc"
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