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/***************************************************************************
* Copyright (C) 2008 by Fredrik Höglund <[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 "kballoontipdelegate.h"
#include <QPainterPath>
#include <QPainter>
#include <QBitmap>
QSize KBalloonTipDelegate::sizeHint(const KStyleOptionToolTip *option, const KToolTipItem *item) const
{
QSize size;
size.rwidth() = option->fontMetrics.width(item->text());
size.rheight() = option->fontMetrics.lineSpacing();
QIcon icon = item->icon();
if (!icon.isNull()) {
const QSize iconSize = icon.actualSize(option->decorationSize);
size.rwidth() += iconSize.width() + 4;
size.rheight() = qMax(size.height(), iconSize.height());
}
int margin = 2 * 10 + (option->activeCorner != KStyleOptionToolTip::NoCorner ? 10 : 0);
return size + QSize(margin, margin);
}
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 KBalloonTipDelegate::createPath(const KStyleOptionToolTip *option, QRect *contents) const
{
QPainterPath path;
QRect rect = option->rect.adjusted(0, 0, -1, -1);
qreal radius = 10;
switch (option->activeCorner)
{
case KStyleOptionToolTip::TopLeftCorner:
rect.adjust(10, 10, 0, 0);
path.moveTo(option->rect.topLeft());
path.lineTo(rect.left() + radius, rect.top());
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.lineTo(rect.left(), rect.top() + radius);
path.closeSubpath();
break;
case KStyleOptionToolTip::TopRightCorner:
rect.adjust(0, 10, -10, 0);
path.moveTo(option->rect.topRight());
path.lineTo(rect.right(), rect.top() + radius);
arc(path, rect.right() - radius, rect.bottom() - radius, radius, 0, -90);
arc(path, rect.left() + radius, rect.bottom() - radius, radius, 270, -90);
arc(path, rect.left() + radius, rect.top() + radius, radius, 180, -90);
path.lineTo(rect.right() - radius, rect.top());
path.closeSubpath();
break;
case KStyleOptionToolTip::BottomLeftCorner:
rect.adjust(10, 0, 0, -10);
path.moveTo(option->rect.bottomLeft());
path.lineTo(rect.left(), rect.bottom() - 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);
path.lineTo(rect.left() + radius, rect.bottom());
path.closeSubpath();
break;
case KStyleOptionToolTip::BottomRightCorner:
rect.adjust(0, 0, -10, -10);
path.moveTo(option->rect.bottomRight());
path.lineTo(rect.right() - radius, rect.bottom());
arc(path, rect.left() + radius, rect.bottom() - radius, radius, 270, -90);
arc(path, rect.left() + radius, rect.top() + radius, radius, 180, -90);
arc(path, rect.right() - radius, rect.top() + radius, radius, 90, -90);
path.lineTo(rect.right(), rect.bottom() - radius);
path.closeSubpath();
break;
default:
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();
break;
}
if (contents)
*contents = rect.adjusted(10, 10, -10, -10);
return path;
}
void KBalloonTipDelegate::paint(QPainter *painter, const KStyleOptionToolTip *option, const KToolTipItem *item) const
{
QRect contents;
QPainterPath path = createPath(option, &contents);
bool alpha = haveAlphaChannel();
if (alpha) {
painter->setRenderHint(QPainter::Antialiasing);
painter->translate(.5, .5);
}
#if QT_VERSION >= 0x040400
painter->setBrush(option->palette.brush(QPalette::ToolTipBase));
#else
painter->setBrush(option->palette.brush(QPalette::Base));
#endif
painter->drawPath(path);
if (alpha)
painter->translate(-.5, -.5);
QIcon icon = item->icon();
if (!icon.isNull()) {
const QSize iconSize = icon.actualSize(option->decorationSize);
painter->drawPixmap(contents.topLeft(), icon.pixmap(iconSize));
contents.adjust(iconSize.width() + 4, 0, 0, 0);
}
painter->drawText(contents, Qt::AlignLeft | Qt::AlignVCenter, item->text());
}
QRegion KBalloonTipDelegate::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 KBalloonTipDelegate::shapeMask(const KStyleOptionToolTip *option) const
{
return inputShape(option);
}
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