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/*******************************************************************************
* Copyright (C) 2008 by Fredrik Höglund <[email protected]> *
* Copyright (C) 2008 by Konstantin Heil <[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 "kformattedballoontipdelegate.h"
#include <QBitmap>
#include <QLinearGradient>
#include <QTextDocument>
#include <kcolorscheme.h>
KFormattedBalloonTipDelegate::KFormattedBalloonTipDelegate()
{
}
KFormattedBalloonTipDelegate::~KFormattedBalloonTipDelegate()
{
}
QSize KFormattedBalloonTipDelegate::sizeHint(const KStyleOptionToolTip *option, const KToolTipItem *item) const
{
QTextDocument doc;
doc.setHtml(item->text());
const QIcon icon = item->icon();
const QSize iconSize = icon.isNull() ? QSize(0, 0) : icon.actualSize(option->decorationSize);
const QSize docSize = doc.size().toSize();
QSize contentSize = iconSize + docSize;
// assure that the content height is large enough for the icon and the document
contentSize.setHeight(iconSize.height() > doc.size().height() ? iconSize.height() : doc.size().height());
return contentSize + QSize(Border * 3, Border * 2);
}
void KFormattedBalloonTipDelegate::paint(QPainter *painter,
const KStyleOptionToolTip *option,
const KToolTipItem *item) const
{
QPainterPath path = createPath(*option);
if (haveAlphaChannel()) {
painter->setRenderHint(QPainter::Antialiasing);
painter->translate(.5, .5);
}
const QColor toColor = option->palette.brush(QPalette::ToolTipBase).color();
const QColor fromColor = KColorScheme::shade(toColor, KColorScheme::LightShade, 0.2);
QLinearGradient gradient(option->rect.topLeft(), option->rect.bottomLeft());
gradient.setColorAt(0.0, fromColor);
gradient.setColorAt(1.0, toColor);
painter->setPen(Qt::NoPen);
painter->setBrush(gradient);
painter->drawPath(path);
const QIcon icon = item->icon();
int x = Border;
const int y = Border;
if (!icon.isNull()) {
const QSize iconSize = icon.actualSize(option->decorationSize);
const QPoint pos(x + option->rect.x(), y + option->rect.y());
painter->drawPixmap(pos, icon.pixmap(iconSize));
x += iconSize.width() + Border;
}
QTextDocument doc;
doc.setHtml(item->text());
QPixmap bitmap(doc.size().toSize());
bitmap.fill(Qt::transparent);
QPainter p(&bitmap);
doc.drawContents(&p);
const QRect docRect(QPoint(x, y), doc.size().toSize());
painter->drawPixmap(docRect, bitmap);
}
QRegion KFormattedBalloonTipDelegate::inputShape(const KStyleOptionToolTip *option) const
{
QBitmap bitmap(option->rect.size());
bitmap.fill(Qt::color0);
QPainter p(&bitmap);
p.setPen(QPen(Qt::color1, 1));
p.setBrush(Qt::color1);
p.drawPath(createPath(*option));
return QRegion(bitmap);
}
QRegion KFormattedBalloonTipDelegate::shapeMask(const KStyleOptionToolTip *option) const
{
return inputShape(option);
}
static inline void 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);
}
QPainterPath KFormattedBalloonTipDelegate::createPath(const KStyleOptionToolTip& option) const
{
const QRect rect = option.rect;
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();
return path;
}
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