Refactor Overlay Handling

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

diff --git a/src/kitemviews/kitemlistgroupheader.cpp b/src/kitemviews/kitemlistgroupheader.cpp
index 4db2532938727030816509a61aa3f763d181686a..20cbc681f12f4c8a29e78dc39010fb82cc45d775 100644 (file)
--- a/src/kitemviews/kitemlistgroupheader.cpp
+++ b/src/kitemviews/kitemlistgroupheader.cpp
@@ -1,35 +1,30 @@
-/***************************************************************************
- *   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 "kitemlistview.h"
 

+#include <QGraphicsSceneResizeEvent>

 #include <QPainter>
 #include <QPainter>

+#include <QStyleOptionGraphicsItem>

 
 

-#include <KDebug>
-
-KItemListGroupHeader::KItemListGroupHeader(QGraphicsWidget* parent) :
-    QGraphicsWidget(parent, 0)
+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()

 {
 }
 
 {
 }
 


@@ -37,22 +32,199 @@ KItemListGroupHeader::~KItemListGroupHeader()
 {
 }
 
 {
 }
 

-QSizeF KItemListGroupHeader::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const
+void KItemListGroupHeader::setRole(const QByteArray &role)
+{
+    if (m_role != role) {
+        const QByteArray previous = m_role;
+        m_role = role;
+        update();
+        roleChanged(role, previous);
+    }
+}
+
+QByteArray KItemListGroupHeader::role() const
+{
+    return m_role;
+}
+
+void KItemListGroupHeader::setData(const QVariant &data)
+{
+    if (m_data != data) {
+        const QVariant previous = m_data;
+        m_data = data;
+        update();
+        dataChanged(data, previous);
+    }
+}
+
+QVariant KItemListGroupHeader::data() const
+{
+    return m_data;
+}
+
+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 &KItemListGroupHeader::styleOption() const
+{
+    return m_styleOption;
+}
+
+void KItemListGroupHeader::setScrollOrientation(Qt::Orientation orientation)
+{
+    if (m_scrollOrientation != orientation) {
+        const Qt::Orientation previous = m_scrollOrientation;
+        m_scrollOrientation = orientation;
+        if (orientation == Qt::Vertical) {
+            m_dirtyCache = true;
+        }
+        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;
+}
+
+void KItemListGroupHeader::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(painter)
+    Q_UNUSED(option)
+    Q_UNUSED(widget)
+
+    if (m_dirtyCache) {
+        updateCache();
+    }
+
+    paintSeparator(painter, m_separatorColor);
+    paintRole(painter, m_roleBounds, m_roleColor);
+}
+
+void KItemListGroupHeader::roleChanged(const QByteArray &current, const QByteArray &previous)
+{
+    Q_UNUSED(current)
+    Q_UNUSED(previous)
+}
+
+void KItemListGroupHeader::dataChanged(const QVariant &current, const QVariant &previous)
+{
+    Q_UNUSED(current)
+    Q_UNUSED(previous)
+}
+
+void KItemListGroupHeader::styleOptionChanged(const KItemListStyleOption &current, const KItemListStyleOption &previous)
+{
+    Q_UNUSED(current)
+    Q_UNUSED(previous)
+}
+
+void KItemListGroupHeader::scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous)
+{
+    Q_UNUSED(current)
+    Q_UNUSED(previous)
+}
+
+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;
+    }
+    updateSize();
+}
+
+void KItemListGroupHeader::updateCache()

 {
 {

-    Q_UNUSED(which);
-    Q_UNUSED(constraint);
-    return QSizeF();
+    Q_ASSERT(m_dirtyCache);
+
+    // 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();
+
+    m_dirtyCache = false;

 }
 
 }
 

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

 {
 {

-    Q_UNUSED(option);
-    Q_UNUSED(widget);
-    painter->setPen(Qt::darkGreen);
-    painter->setBrush(QColor(0, 255, 0, 50));
-    painter->drawRect(rect());
+    const int padding = qMax(1, m_styleOption.padding);
+    const int horizontalMargin = qMax(2, m_styleOption.horizontalMargin);

 
 

-    //painter->drawText(rect(), QString::number(m_index));
+    const QFontMetrics fontMetrics(m_styleOption.font);
+    const qreal roleHeight = fontMetrics.height();
+
+    const int y = (m_scrollOrientation == Qt::Vertical) ? padding : horizontalMargin;
+
+    m_roleBounds = QRectF(horizontalMargin + padding, y, size().width() - 2 * (padding + horizontalMargin), roleHeight);
+
+    update();
+}
+
+QColor KItemListGroupHeader::mixedColor(const QColor &c1, const QColor &c2, int c1Percent)
+{
+    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);
+}
+
+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"