Provide additional default groups for the Places Panel

If Nepomuk is enabled, it is now possible to easily search for
some most common queries by having additional groups.

1 files changed, 125 insertions, 0 deletions

diff --git a/src/kitemviews/kstandarditemlistgroupheader.cpp b/src/kitemviews/kstandarditemlistgroupheader.cpp
new file mode 100644
index 000000000..3a5ddd944
--- /dev/null
+++ b/src/kitemviews/kstandarditemlistgroupheader.cpp
@@ -0,0 +1,125 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   Based on the Itemviews NG project from Trolltech Labs:                *
+ *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
+ *                                                                         *
+ *   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 "kstandarditemlistgroupheader.h"
+
+#include <kratingpainter.h>
+#include <QPainter>
+
+KStandardItemListGroupHeader::KStandardItemListGroupHeader(QGraphicsWidget* parent) :
+    KItemListGroupHeader(parent),
+    m_dirtyCache(true),
+    m_text(),
+    m_pixmap()
+{
+    m_text.setTextFormat(Qt::PlainText);
+    m_text.setPerformanceHint(QStaticText::AggressiveCaching);
+}
+
+KStandardItemListGroupHeader::~KStandardItemListGroupHeader()
+{
+}
+
+void KStandardItemListGroupHeader::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
+{
+    if (m_dirtyCache) {
+        updateCache();
+    }
+    KItemListGroupHeader::paint(painter, option, widget);
+}
+
+void KStandardItemListGroupHeader::paintRole(QPainter* painter, const QRectF& roleBounds, const QColor& color)
+{
+    if (m_pixmap.isNull()) {
+        painter->setPen(color);
+        painter->drawStaticText(roleBounds.topLeft(), m_text);
+    } else {
+        painter->drawPixmap(roleBounds.topLeft(), m_pixmap);
+    }
+}
+
+void KStandardItemListGroupHeader::paintSeparator(QPainter* painter, const QColor& color)
+{
+    if (itemIndex() == 0) {
+        // No top- or left-line should be drawn for the first group-header
+        return;
+    }
+
+    painter->setPen(color);
+
+    if (scrollOrientation() == Qt::Horizontal) {
+        painter->drawLine(0, 0, 0, size().height() - 1);
+    } else {
+        painter->drawLine(0, 0, size().width() - 1, 0);
+    }
+}
+
+void KStandardItemListGroupHeader::roleChanged(const QByteArray &current, const QByteArray &previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
+    m_dirtyCache = true;
+}
+
+void KStandardItemListGroupHeader::dataChanged(const QVariant& current, const QVariant& previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
+    m_dirtyCache = true;
+}
+
+void KStandardItemListGroupHeader::resizeEvent(QGraphicsSceneResizeEvent* event)
+{
+    QGraphicsWidget::resizeEvent(event);
+    m_dirtyCache = true;
+}
+
+void KStandardItemListGroupHeader::updateCache()
+{
+    Q_ASSERT(m_dirtyCache);
+    m_dirtyCache = false;
+
+    const qreal maxWidth = size().width() - 4 * styleOption().padding;
+
+    if (role() == "rating") {
+        m_text = QString();
+
+        const qreal height = styleOption().fontMetrics.ascent();
+        const QSizeF pixmapSize(qMin(height * 5, maxWidth), height);
+
+        m_pixmap = QPixmap(pixmapSize.toSize());
+        m_pixmap.fill(Qt::transparent);
+
+        QPainter painter(&m_pixmap);
+        const QRect rect(0, 0, m_pixmap.width(), m_pixmap.height());
+        const int rating = data().toInt();
+        KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
+    } else {
+        m_pixmap = QPixmap();
+
+        QFontMetricsF fontMetrics(font());
+        const QString text = fontMetrics.elidedText(data().toString(), Qt::ElideRight, maxWidth);
+        m_text.setText(text);
+    }
+}
+
+#include "kstandarditemlistgroupheader.moc"