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https://bitbucket.org/smil3y/kde-workspace.git
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96 lines
3.7 KiB
C++
96 lines
3.7 KiB
C++
/*******************************************************************************
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* Copyright (C) 2008 by Fredrik Höglund <fredrik@kde.org> *
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* Copyright (C) 2008 by Konstantin Heil <konst.heil@stud.uni-heidelberg.de> *
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* Copyright (C) 2009 by Peter Penz <peter.penz@gmx.at> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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*******************************************************************************/
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#include "ktooltipwindow_p.h"
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#include <kcolorscheme.h>
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#include <QPainter>
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#include <QVBoxLayout>
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#ifdef Q_WS_X11
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#include <QtGui/qx11info_x11.h>
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#endif
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KToolTipWindow::KToolTipWindow(QWidget* content) :
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QWidget(0)
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{
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setAttribute(Qt::WA_TranslucentBackground);
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setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
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QVBoxLayout* layout = new QVBoxLayout(this);
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layout->addWidget(content);
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}
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KToolTipWindow::~KToolTipWindow()
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{
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}
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void KToolTipWindow::paintEvent(QPaintEvent* event)
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{
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Q_UNUSED(event);
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QPainter painter(this);
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QColor toColor = palette().brush(QPalette::ToolTipBase).color();
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QColor fromColor = KColorScheme::shade(toColor, KColorScheme::LightShade, 0.2);
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#ifdef Q_WS_X11
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const bool haveAlphaChannel = QX11Info::isCompositingManagerRunning();
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#else
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const bool haveAlphaChannel = false;
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#endif
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if (haveAlphaChannel) {
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painter.setRenderHint(QPainter::Antialiasing);
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painter.translate(0.5, 0.5);
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toColor.setAlpha(220);
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fromColor.setAlpha(220);
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}
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QLinearGradient gradient(QPointF(0.0, 0.0), QPointF(0.0, height()));
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gradient.setColorAt(0.0, fromColor);
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gradient.setColorAt(1.0, toColor);
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painter.setPen(Qt::NoPen);
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painter.setBrush(gradient);
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const QRect rect(0, 0, width(), height());
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if (haveAlphaChannel) {
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const qreal radius = 5.0;
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QPainterPath path;
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path.moveTo(rect.left(), rect.top() + radius);
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arc(path, rect.left() + radius, rect.top() + radius, radius, 180, -90);
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arc(path, rect.right() - radius, rect.top() + radius, radius, 90, -90);
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arc(path, rect.right() - radius, rect.bottom() - radius, radius, 0, -90);
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arc(path, rect.left() + radius, rect.bottom() - radius, radius, 270, -90);
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path.closeSubpath();
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painter.drawPath(path);
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} else {
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painter.drawRect(rect);
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}
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}
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void KToolTipWindow::arc(QPainterPath& path, qreal cx, qreal cy, qreal radius, qreal angle, qreal sweeplength)
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{
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path.arcTo(cx-radius, cy-radius, radius * 2, radius * 2, angle, sweeplength);
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}
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