Provide tooltips. Per default tooltips are turned off because the information sidebar is turned on already.

Thanks a lot to Konstantin Heil and Fredrik Höglund for the code :-)

CCMAIL: [email protected]
CCMAIL: [email protected]

svn path=/trunk/KDE/kdebase/apps/; revision=795324

1 files changed, 164 insertions, 0 deletions

diff --git a/src/kballoontipdelegate.cpp b/src/kballoontipdelegate.cpp
new file mode 100644
index 000000000..84e0a63e0
--- /dev/null
+++ b/src/kballoontipdelegate.cpp
@@ -0,0 +1,164 @@
+/***************************************************************************
+ *   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);
+}
+