Fix right-mouse click crashes on Windows

[dolphin.git] / src / kitemviews / kitemlistgroupheader.cpp

diff --git a/src/kitemviews/kitemlistgroupheader.cpp b/src/kitemviews/kitemlistgroupheader.cpp
index a63ad8d0913c79025a19dc206485020e5265fc3c..0604f2da014eff6b31477aea84e81a2dcc9cf370 100644 (file)
--- a/src/kitemviews/kitemlistgroupheader.cpp
+++ b/src/kitemviews/kitemlistgroupheader.cpp
@@ -1,53 +1,38 @@
-/***************************************************************************
- *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
- *                                                                         *
- *   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 "kitemlistgroupheader.h"
+/*
+ * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
+ *
+ * Based on the Itemviews NG project from Trolltech Labs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "kstandarditemlistgroupheader.h"

 
 #include "kitemlistview.h"
 
 #include <QGraphicsSceneResizeEvent>
 #include <QPainter>
 #include <QStyleOptionGraphicsItem>
 
 #include "kitemlistview.h"
 
 #include <QGraphicsSceneResizeEvent>
 #include <QPainter>
 #include <QStyleOptionGraphicsItem>

-#include <KDebug>

 
 

-KItemListGroupHeader::KItemListGroupHeader(QGraphicsWidget* parent) :
-    QGraphicsWidget(parent, 0),
-    m_dirtyCache(true),
-    m_role(),
-    m_data(),
-    m_styleOption(),
-    m_scrollOrientation(Qt::Vertical),
-    m_leftBorderCache(0),
-    m_rightBorderCache(0),
-    m_outlineColor()
+KItemListGroupHeader::KItemListGroupHeader(QGraphicsWidget *parent)
+    : QGraphicsWidget(parent)
+    , m_dirtyCache(true)
+    , m_role()
+    , m_data()
+    , m_styleOption()
+    , m_scrollOrientation(Qt::Vertical)
+    , m_itemIndex(-1)
+    , m_separatorColor()
+    , m_roleColor()
+    , m_roleBounds()

 {
 }
 
 KItemListGroupHeader::~KItemListGroupHeader()
 {
 {
 }
 
 KItemListGroupHeader::~KItemListGroupHeader()
 {

-    deleteCache();

 }
 
 }
 

-void KItemListGroupHeader::setRole(const QByteArray& role)
+void KItemListGroupHeader::setRole(const QByteArray &role)

 {
     if (m_role != role) {
         const QByteArray previous = m_role;
 {
     if (m_role != role) {
         const QByteArray previous = m_role;


@@ -62,7 +47,7 @@ QByteArray KItemListGroupHeader::role() const
     return m_role;
 }
 
     return m_role;
 }
 

-void KItemListGroupHeader::setData(const QVariant& data)
+void KItemListGroupHeader::setData(const QVariant &data)

 {
     if (m_data != data) {
         const QVariant previous = m_data;
 {
     if (m_data != data) {
         const QVariant previous = m_data;


@@ -77,15 +62,19 @@ QVariant KItemListGroupHeader::data() const
     return m_data;
 }
 
     return m_data;
 }
 

-void KItemListGroupHeader::setStyleOption(const KItemListStyleOption& option)
+void KItemListGroupHeader::setStyleOption(const KItemListStyleOption &option)

 {
 {

+    if (m_styleOption == option) {
+        return;
+    }
+

     const KItemListStyleOption previous = m_styleOption;
     m_styleOption = option;
     m_dirtyCache = true;
     styleOptionChanged(option, previous);
 }
 
     const KItemListStyleOption previous = m_styleOption;
     m_styleOption = option;
     m_dirtyCache = true;
     styleOptionChanged(option, previous);
 }
 

-const KItemListStyleOption& KItemListGroupHeader::styleOption() const
+const KItemListStyleOption &KItemListGroupHeader::styleOption() const

 {
     return m_styleOption;
 }
 {
     return m_styleOption;
 }


@@ -97,155 +86,145 @@ void KItemListGroupHeader::setScrollOrientation(Qt::Orientation orientation)
         m_scrollOrientation = orientation;
         if (orientation == Qt::Vertical) {
             m_dirtyCache = true;
         m_scrollOrientation = orientation;
         if (orientation == Qt::Vertical) {
             m_dirtyCache = true;

-        } else {
-            deleteCache();

         }
         scrollOrientationChanged(orientation, previous);
     }
 }
 
         }
         scrollOrientationChanged(orientation, previous);
     }
 }
 

+void KItemListGroupHeader::setItemIndex(int index)
+{
+    if (m_itemIndex != index) {
+        const int previous = m_itemIndex;
+        m_itemIndex = index;
+        m_dirtyCache = true;
+        itemIndexChanged(m_itemIndex, previous);
+    }
+}
+
+int KItemListGroupHeader::itemIndex() const
+{
+    return m_itemIndex;
+}
+

 Qt::Orientation KItemListGroupHeader::scrollOrientation() const
 {
     return m_scrollOrientation;
 }
 
 Qt::Orientation KItemListGroupHeader::scrollOrientation() const
 {
     return m_scrollOrientation;
 }
 

-void KItemListGroupHeader::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
+void KItemListGroupHeader::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

 {
 {

-    Q_UNUSED(option);
-    Q_UNUSED(widget);
-
-    if (m_scrollOrientation == Qt::Horizontal) {
-        Q_ASSERT(!m_leftBorderCache);
-        Q_ASSERT(!m_rightBorderCache);
-        return;
-    }
+    Q_UNUSED(painter)
+    Q_UNUSED(option)
+    Q_UNUSED(widget)

 
     if (m_dirtyCache) {
         updateCache();
     }
 
 
     if (m_dirtyCache) {
         updateCache();
     }
 

-    const int leftBorderX = m_leftBorderCache->width() + 1;
-    const int rightBorderX = size().width() - m_rightBorderCache->width() - 2;
-
-    painter->setPen(m_outlineColor);
-    painter->drawLine(leftBorderX, 1, rightBorderX, 1);
-
-    painter->drawPixmap(1, 1, *m_leftBorderCache);
-    painter->drawPixmap(rightBorderX, 1, *m_rightBorderCache);
+    paintSeparator(painter, m_separatorColor);
+    paintRole(painter, m_roleBounds, m_roleColor);

 }
 
 }
 

-void KItemListGroupHeader::roleChanged(const QByteArray& current, const QByteArray& previous)
+void KItemListGroupHeader::roleChanged(const QByteArray &current, const QByteArray &previous)

 {
 {

-    Q_UNUSED(current);
-    Q_UNUSED(previous);
+    Q_UNUSED(current)
+    Q_UNUSED(previous)

 }
 
 }
 

-void KItemListGroupHeader::dataChanged(const QVariant& current, const QVariant& previous)
+void KItemListGroupHeader::dataChanged(const QVariant &current, const QVariant &previous)

 {
 {

-    Q_UNUSED(current);
-    Q_UNUSED(previous);
+    Q_UNUSED(current)
+    Q_UNUSED(previous)

 }
 
 }
 

-void KItemListGroupHeader::styleOptionChanged(const KItemListStyleOption& current, const KItemListStyleOption& previous)
+void KItemListGroupHeader::styleOptionChanged(const KItemListStyleOption &current, const KItemListStyleOption &previous)

 {
 {

-    Q_UNUSED(current);
-    Q_UNUSED(previous);
+    Q_UNUSED(current)
+    Q_UNUSED(previous)

 }
 
 void KItemListGroupHeader::scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous)
 {
 }
 
 void KItemListGroupHeader::scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous)
 {

-    Q_UNUSED(current);
-    Q_UNUSED(previous);
+    Q_UNUSED(current)
+    Q_UNUSED(previous)

 }
 
 }
 

-void KItemListGroupHeader::resizeEvent(QGraphicsSceneResizeEvent* event)
+void KItemListGroupHeader::itemIndexChanged(int current, int previous)
+{
+    Q_UNUSED(current)
+    Q_UNUSED(previous)
+}
+
+void KItemListGroupHeader::resizeEvent(QGraphicsSceneResizeEvent *event)

 {
     QGraphicsWidget::resizeEvent(event);
     if (event->oldSize().height() != event->newSize().height()) {
         m_dirtyCache = true;
     }
 {
     QGraphicsWidget::resizeEvent(event);
     if (event->oldSize().height() != event->newSize().height()) {
         m_dirtyCache = true;
     }

+    updateSize();

 }
 
 void KItemListGroupHeader::updateCache()
 {
     Q_ASSERT(m_dirtyCache);
 
 }
 
 void KItemListGroupHeader::updateCache()
 {
     Q_ASSERT(m_dirtyCache);
 

-    deleteCache();
+    // Calculate the role- and line-color. No alphablending is used for
+    // performance reasons.
+    const QColor c1 = textColor();
+    const QColor c2 = baseColor();
+    m_separatorColor = mixedColor(c1, c2, 10);
+    m_roleColor = mixedColor(c1, c2, 60);
+
+    updateSize();

 
 

-    const int length = qMax(int(size().height() - 1), 1);
-    m_leftBorderCache = new QPixmap(length, length);
-    m_leftBorderCache->fill(Qt::transparent);
+    m_dirtyCache = false;
+}

 
 

-    m_rightBorderCache = new QPixmap(length, length);
-    m_rightBorderCache->fill(Qt::transparent);
+void KItemListGroupHeader::updateSize()
+{
+    const int padding = qMax(1, m_styleOption.padding);
+    const int horizontalMargin = qMax(2, m_styleOption.horizontalMargin);

 
 

-    // Calculate the outline color. No alphablending is used for
-    // performance reasons.
-    const QColor c1 = m_styleOption.palette.text().color();
-    const QColor c2 = m_styleOption.palette.background().color();
-    const int p1 = 35;
-    const int p2 = 100 - p1;
-    m_outlineColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
-                            (c1.green() * p1 + c2.green() * p2) / 100,
-                            (c1.blue()  * p1 + c2.blue()  * p2) / 100);
-
-    // The drawing code is based on the code of DolphinCategoryDrawer from Dolphin 1.7
-    // Copyright (C) 2007 Rafael Fernández López <ereslibre@kde.org>
-    {
-        // Cache the left border as pixmap
-        QPainter painter(m_leftBorderCache);
-        painter.setPen(m_outlineColor);
-
-        // 1. Draw top horizontal line
-        painter.drawLine(3, 0, length, 0);
-
-        // 2. Draw vertical line with gradient
-        const QPoint start(0, 3);
-        QLinearGradient gradient(start, QPoint(0, length));
-        gradient.setColorAt(0, m_outlineColor);
-        gradient.setColorAt(1, Qt::transparent);
-        painter.fillRect(QRect(start, QSize(1, length - start.y())), gradient);
-
-        // 3. Draw arc
-        painter.setRenderHint(QPainter::Antialiasing);
-        QRectF arc(QPointF(0, 0), QSizeF(4, 4));
-        arc.translate(0.5, 0.5);
-        painter.drawArc(arc, 1440, 1440);
-    }
+    const QFontMetrics fontMetrics(m_styleOption.font);
+    const qreal roleHeight = fontMetrics.height();

 
 

-    {
-        // Cache the right border as pixmap
-        QPainter painter(m_rightBorderCache);
-        painter.setPen(m_outlineColor);
-
-        // 1. Draw top horizontal line
-        painter.drawLine(0, 0, length - 3, 0);
-
-        // 2. Draw vertical line with gradient
-        const int right = length - 1;
-        const QPoint start(right, 3);
-        QLinearGradient gradient(start, QPoint(right, length));
-        gradient.setColorAt(0, m_outlineColor);
-        gradient.setColorAt(1, Qt::transparent);
-        painter.fillRect(QRect(start, QSize(1, length - start.y())), gradient);
-
-        // 3. Draw arc
-        painter.setRenderHint(QPainter::Antialiasing);
-        QRectF arc(QPointF(length - 5, 0), QSizeF(4, 4));
-        arc.translate(0.5, 0.5);
-        painter.drawArc(arc, 0, 1440);
-    }
+    const int y = (m_scrollOrientation == Qt::Vertical) ? padding : horizontalMargin;

 
 

-    m_dirtyCache = false;
+    m_roleBounds = QRectF(horizontalMargin + padding, y, size().width() - 2 * padding - horizontalMargin, roleHeight);
+
+    update();

 }
 
 }
 

-void KItemListGroupHeader::deleteCache()
+QColor KItemListGroupHeader::mixedColor(const QColor &c1, const QColor &c2, int c1Percent)

 {
 {

-    delete m_leftBorderCache;
-    m_leftBorderCache = 0;
+    Q_ASSERT(c1Percent >= 0 && c1Percent <= 100);
+
+    const int c2Percent = 100 - c1Percent;
+    return QColor((c1.red() * c1Percent + c2.red() * c2Percent) / 100,
+                  (c1.green() * c1Percent + c2.green() * c2Percent) / 100,
+                  (c1.blue() * c1Percent + c2.blue() * c2Percent) / 100);
+}

 
 

-    delete m_rightBorderCache;
-    m_rightBorderCache = 0;
+QPalette::ColorRole KItemListGroupHeader::normalTextColorRole() const
+{
+    return QPalette::Text;
+}
+
+QPalette::ColorRole KItemListGroupHeader::normalBaseColorRole() const
+{
+    return QPalette::Window;
+}
+
+QColor KItemListGroupHeader::textColor() const
+{
+    const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
+    return styleOption().palette.color(group, normalTextColorRole());
+}
+
+QColor KItemListGroupHeader::baseColor() const
+{
+    const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
+    return styleOption().palette.color(group, normalBaseColorRole());

 }
 
 }
 

-#include "kitemlistgroupheader.moc"
+#include "moc_kitemlistgroupheader.cpp"