X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/06f057d385f3924235697942ebc73aa1956515c2..42adf258b65f2785bd08d6dcbdabce92187c99cf:/src/kitemviews/kitemlistheader.cpp

diff --git a/src/kitemviews/kitemlistheader.cpp b/src/kitemviews/kitemlistheader.cpp
index d1730a090..7b5549c73 100644
--- a/src/kitemviews/kitemlistheader.cpp
+++ b/src/kitemviews/kitemlistheader.cpp
@@ -19,18 +19,31 @@
 
 #include "kitemlistheader_p.h"
 
+#include <KAction>
+#include <KMenu>
 #include "kitemmodelbase.h"
 
-#include <QFontMetricsF>
+#include <QApplication>
+#include <QGraphicsSceneHoverEvent>
 #include <QPainter>
 #include <QStyleOptionHeader>
 
+#include <KDebug>
+
 KItemListHeader::KItemListHeader(QGraphicsWidget* parent) :
     QGraphicsWidget(parent),
-    m_model(0)
+    m_model(0),
+    m_visibleRoles(),
+    m_visibleRolesWidths(),
+    m_hoveredRoleIndex(-1),
+    m_pressedRoleIndex(-1),
+    m_roleOperation(NoRoleOperation),
+    m_pressedMousePos()
 {
-    QStyleOptionHeader opt;
-    const QSize headerSize = style()->sizeFromContents(QStyle::CT_HeaderSection, &opt, QSize());
+    setAcceptHoverEvents(true);
+
+    QStyleOptionHeader option;
+    const QSize headerSize = style()->sizeFromContents(QStyle::CT_HeaderSection, &option, QSize());
     resize(0, headerSize.height());
 }
 
@@ -66,28 +79,275 @@ KItemModelBase* KItemListHeader::model() const
     return m_model;
 }
 
+void KItemListHeader::setVisibleRoles(const QList<QByteArray>& roles)
+{
+    m_visibleRoles = roles;
+    update();
+}
+
+QList<QByteArray> KItemListHeader::visibleRoles() const
+{
+    return m_visibleRoles;
+}
+
+void KItemListHeader::setVisibleRolesWidths(const QHash<QByteArray, qreal> rolesWidths)
+{
+    m_visibleRolesWidths = rolesWidths;
+
+    // Assure that no width is smaller than the minimum allowed width
+    const qreal minWidth = minimumRoleWidth();
+    QMutableHashIterator<QByteArray, qreal> it(m_visibleRolesWidths);
+    while (it.hasNext()) {
+        it.next();
+        if (it.value() < minWidth) {
+            m_visibleRolesWidths.insert(it.key(), minWidth);
+        }
+    }
+
+    update();
+}
+
+QHash<QByteArray, qreal> KItemListHeader::visibleRolesWidths() const
+{
+    return m_visibleRolesWidths;
+}
+
+qreal KItemListHeader::minimumRoleWidth() const
+{
+    QFontMetricsF fontMetrics(font());
+    return fontMetrics.height() * 4;
+}
+
 void KItemListHeader::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 {
     Q_UNUSED(option);
     Q_UNUSED(widget);
 
+    if (!m_model) {
+        return;
+    }
+
+    // Draw roles
+    painter->setFont(font());
+    painter->setPen(palette().text().color());
+
+    qreal x = 0;
+    int orderIndex = 0;
+    foreach (const QByteArray& role, m_visibleRoles) {
+        const qreal roleWidth = m_visibleRolesWidths.value(role);
+        const QRectF rect(x, 0, roleWidth, size().height());
+        paintRole(painter, role, rect, orderIndex);
+        x += roleWidth;
+        ++orderIndex;
+    }
+
+    // Draw background without roles
     QStyleOption opt;
     opt.init(widget);
-    opt.rect = rect().toRect();
+    opt.rect = QRect(x, 0, size().width() - x, size().height());
     opt.state |= QStyle::State_Horizontal;
     style()->drawControl(QStyle::CE_HeaderEmptyArea, &opt, painter);
 }
 
+void KItemListHeader::mousePressEvent(QGraphicsSceneMouseEvent* event)
+{
+    if (event->button() & Qt::LeftButton) {
+        updatePressedRoleIndex(event->pos());
+        m_pressedMousePos = event->pos();
+        m_roleOperation = isAboveRoleGrip(m_pressedMousePos, m_pressedRoleIndex) ?
+                          ResizeRoleOperation : NoRoleOperation;
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+
+void KItemListHeader::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
+{
+    QGraphicsWidget::mouseReleaseEvent(event);
+
+    if (m_pressedRoleIndex == -1) {
+        return;
+    }
+
+    if (m_roleOperation == NoRoleOperation) {
+        // Only a click has been done and no moving or resizing has been started
+        const QByteArray sortRole = m_model->sortRole();
+        const int sortRoleIndex = m_visibleRoles.indexOf(sortRole);
+        if (m_pressedRoleIndex == sortRoleIndex) {
+            // Toggle the sort order
+            const Qt::SortOrder previous = m_model->sortOrder();
+            const Qt::SortOrder current = (m_model->sortOrder() == Qt::AscendingOrder) ?
+                                          Qt::DescendingOrder : Qt::AscendingOrder;
+            m_model->setSortOrder(current);
+            emit sortOrderChanged(current, previous);
+        } else {
+            // Change the sort role
+            const QByteArray previous = m_model->sortRole();
+            const QByteArray current = m_visibleRoles.at(m_pressedRoleIndex);
+            m_model->setSortRole(current);
+            emit sortRoleChanged(current, previous);
+        }
+    }
+
+    m_pressedRoleIndex = -1;
+    m_roleOperation = NoRoleOperation;
+    update();
+}
+
+void KItemListHeader::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
+{
+    QGraphicsWidget::mouseMoveEvent(event);
+
+    if (m_roleOperation == ResizeRoleOperation) {
+        const QByteArray pressedRole = m_visibleRoles.at(m_pressedRoleIndex);
+
+        qreal previousWidth = m_visibleRolesWidths.value(pressedRole);
+        qreal currentWidth = previousWidth;
+        currentWidth += event->pos().x() - event->lastPos().x();
+        currentWidth = qMax(minimumRoleWidth(), currentWidth);
+
+        m_visibleRolesWidths.insert(pressedRole, currentWidth);
+        update();
+
+        emit visibleRoleWidthChanged(pressedRole, currentWidth, previousWidth);
+    } else if ((event->pos() - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
+        kDebug() << "Moving of role not supported yet";
+        m_roleOperation = MoveRoleOperation;
+    }
+}
+
+void KItemListHeader::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
+{
+    QGraphicsWidget::hoverEnterEvent(event);
+    updateHoveredRoleIndex(event->pos());
+}
+
+void KItemListHeader::hoverLeaveEvent(QGraphicsSceneHoverEvent* event)
+{
+    QGraphicsWidget::hoverLeaveEvent(event);
+    if (m_hoveredRoleIndex != -1) {
+        m_hoveredRoleIndex = -1;
+        update();
+    }
+}
+
+void KItemListHeader::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
+{
+    QGraphicsWidget::hoverMoveEvent(event);
+
+    const QPointF& pos = event->pos();
+    updateHoveredRoleIndex(pos);
+    if (m_hoveredRoleIndex >= 0 && isAboveRoleGrip(pos, m_hoveredRoleIndex)) {
+        setCursor(Qt::SplitHCursor);
+    } else {
+        unsetCursor();
+    }
+}
+
 void KItemListHeader::slotSortRoleChanged(const QByteArray& current, const QByteArray& previous)
 {
     Q_UNUSED(current);
     Q_UNUSED(previous);
+    update();
 }
 
 void KItemListHeader::slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous)
 {
     Q_UNUSED(current);
     Q_UNUSED(previous);
+    update();
+}
+
+void KItemListHeader::paintRole(QPainter* painter,
+                                const QByteArray& role,
+                                const QRectF& rect,
+                                int orderIndex)
+{
+    // The following code is based on the code from QHeaderView::paintSection().
+    // Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+    QStyleOptionHeader option;
+    option.section = orderIndex;
+    option.state = QStyle::State_None | QStyle::State_Raised | QStyle::State_Horizontal;
+    if (isEnabled()) {
+        option.state |= QStyle::State_Enabled;
+    }
+    if (window() && window()->isActiveWindow()) {
+        option.state |= QStyle::State_Active;
+    }
+    if (m_hoveredRoleIndex == orderIndex) {
+        option.state |= QStyle::State_MouseOver;
+    }
+    if (m_pressedRoleIndex == orderIndex) {
+        option.state |= QStyle::State_Sunken;
+    }
+    if (m_model->sortRole() == role) {
+        option.sortIndicator = (m_model->sortOrder() == Qt::AscendingOrder) ?
+                                QStyleOptionHeader::SortDown : QStyleOptionHeader::SortUp;
+    }
+    option.rect = rect.toRect();
+
+    if (m_visibleRoles.count() == 1) {
+        option.position = QStyleOptionHeader::OnlyOneSection;
+    } else if (orderIndex == 0) {
+        option.position = QStyleOptionHeader::Beginning;
+    } else if (orderIndex == m_visibleRoles.count() - 1) {
+        option.position = QStyleOptionHeader::End;
+    } else {
+        option.position = QStyleOptionHeader::Middle;
+    }
+
+    option.orientation = Qt::Horizontal;
+    option.selectedPosition = QStyleOptionHeader::NotAdjacent;
+    option.text = m_model->roleDescription(role);
+
+    style()->drawControl(QStyle::CE_Header, &option, painter);
+}
+
+void KItemListHeader::updatePressedRoleIndex(const QPointF& pos)
+{
+    const int pressedIndex = roleIndexAt(pos);
+    if (m_pressedRoleIndex != pressedIndex) {
+        m_pressedRoleIndex = pressedIndex;
+        update();
+    }
+}
+
+void KItemListHeader::updateHoveredRoleIndex(const QPointF& pos)
+{
+    const int hoverIndex = roleIndexAt(pos);
+    if (m_hoveredRoleIndex != hoverIndex) {
+        m_hoveredRoleIndex = hoverIndex;
+        update();
+    }
+}
+
+int KItemListHeader::roleIndexAt(const QPointF& pos) const
+{
+    int index = -1;
+
+    qreal x = 0;
+    foreach (const QByteArray& role, m_visibleRoles) {
+        ++index;
+        x += m_visibleRolesWidths.value(role);
+        if (pos.x() <= x) {
+            break;
+        }
+    }
+
+    return index;
+}
+
+bool KItemListHeader::isAboveRoleGrip(const QPointF& pos, int roleIndex) const
+{
+    qreal x = 0;
+    for (int i = 0; i <= roleIndex; ++i) {
+        const QByteArray role = m_visibleRoles.at(i);
+        x += m_visibleRolesWidths.value(role);
+    }
+
+    const int grip = style()->pixelMetric(QStyle::PM_HeaderGripMargin);
+    return pos.x() >= (x - grip) && pos.x() <= x;
 }
 
 #include "kitemlistheader_p.moc"