]> cloud.milkyroute.net Git - dolphin.git/blobdiff - src/dolphincolumnview.cpp
${CMAKE_SOURCE_DIR}/libkonq doesn't exist now
[dolphin.git] / src / dolphincolumnview.cpp
index 81337cb20c296bbecfba385e6b045aef1f09bc49..d7fc15fc81dd4914a670146a4f7b4822f4c15a15 100644 (file)
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
+ *   Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                  *
  *                                                                         *
  *   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  *
@@ -19,6 +19,7 @@
 
 #include "dolphincolumnview.h"
 
+#include "dolphinmodel.h"
 #include "dolphincontroller.h"
 #include "dolphinsettings.h"
 
 
 #include <kcolorutils.h>
 #include <kcolorscheme.h>
-#include <kdirmodel.h>
 #include <kdirlister.h>
-#include <kfileitem.h>
 
 #include <QAbstractProxyModel>
+#include <QApplication>
 #include <QPoint>
+#include <QScrollBar>
+#include <QTimer>
+#include <QTimeLine>
 
 /**
  * Represents one column inside the DolphinColumnView and has been
@@ -54,8 +57,21 @@ public:
      * drawn in a lighter color. All operations are applied to this column.
      */
     void setActive(bool active);
+    bool isActive() const;
 
-    inline const KUrl& url() const;
+    /**
+     * Sets the directory URL of the child column that is shown next to
+     * this column. This property is only used for a visual indication
+     * of the shown directory, it does not trigger a loading of the model.
+     */
+    void setChildUrl(const KUrl& url);
+    const KUrl& childUrl() const;
+
+    /** Sets the directory URL that is shown inside the column widget. */
+    void setUrl(const KUrl& url);
+
+    /** Returns the directory URL that is shown inside the column widget. */
+    const KUrl& url() const;
 
 protected:
     virtual QStyleOptionViewItem viewOptions() const;
@@ -63,9 +79,11 @@ protected:
     virtual void dragLeaveEvent(QDragLeaveEvent* event);
     virtual void dragMoveEvent(QDragMoveEvent* event);
     virtual void dropEvent(QDropEvent* event);
-    virtual void mousePressEvent(QMouseEvent* event);
     virtual void paintEvent(QPaintEvent* event);
+    virtual void mousePressEvent(QMouseEvent* event);
+    virtual void keyPressEvent(QKeyEvent* event);
     virtual void contextMenuEvent(QContextMenuEvent* event);
+    virtual void selectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
 
 private:
     /** Used by ColumnWidget::setActive(). */
@@ -76,8 +94,9 @@ private:
 
 private:
     bool m_active;
-    KUrl m_url;
     DolphinColumnView* m_view;
+    KUrl m_url;      // URL of the directory that is shown
+    KUrl m_childUrl; // URL of the next column that is shown
     QStyleOptionViewItem m_viewOptions;
 
     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
@@ -89,17 +108,22 @@ ColumnWidget::ColumnWidget(QWidget* parent,
                            const KUrl& url) :
     QListView(parent),
     m_active(true),
-    m_url(url),
     m_view(columnView),
+    m_url(url),
+    m_childUrl(),
     m_dragging(false),
     m_dropRect()
 {
-    setAcceptDrops(true);
-    setDragDropMode(QAbstractItemView::DragDrop);
-    setDropIndicatorShown(false);
-
     setMouseTracking(true);
     viewport()->setAttribute(Qt::WA_Hover);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
+    setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+    setSelectionBehavior(SelectItems);
+    setSelectionMode(QAbstractItemView::ExtendedSelection);
+    setDragDropMode(QAbstractItemView::DragDrop);
+    setDropIndicatorShown(false);
+    setFocusPolicy(Qt::NoFocus);
 
     // apply the column mode settings to the widget
     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
@@ -115,7 +139,17 @@ ColumnWidget::ColumnWidget(QWidget* parent,
     const int iconSize = settings->iconSize();
     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 
+    m_viewOptions.showDecorationSelected = true;
+
+    KFileItemDelegate* delegate = new KFileItemDelegate(this);
+    setItemDelegate(delegate);
+
     activate();
+
+    connect(this, SIGNAL(entered(const QModelIndex&)),
+            m_view->m_controller, SLOT(emitItemEntered(const QModelIndex&)));
+    connect(this, SIGNAL(viewportEntered()),
+            m_view->m_controller, SLOT(emitViewportEntered()));
 }
 
 ColumnWidget::~ColumnWidget()
@@ -143,12 +177,32 @@ void ColumnWidget::setActive(bool active)
     }
 }
 
-const KUrl& ColumnWidget::url() const
+inline bool ColumnWidget::isActive() const
+{
+    return m_active;
+}
+
+inline void ColumnWidget::setChildUrl(const KUrl& url)
+{
+    m_childUrl = url;
+}
+
+inline const KUrl& ColumnWidget::childUrl() const
+{
+    return m_childUrl;
+}
+
+inline void ColumnWidget::setUrl(const KUrl& url)
+{
+    m_url = url;
+}
+
+inline const KUrl& ColumnWidget::url() const
 {
     return m_url;
 }
 
-QStyleOptionViewItem ColumnWidget::viewOptions() const
+inline QStyleOptionViewItem ColumnWidget::viewOptions() const
 {
     return m_viewOptions;
 }
@@ -175,7 +229,7 @@ void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 {
     QListView::dragMoveEvent(event);
 
-   // TODO: remove this code when the issue #160611 is solved in Qt 4.4
+    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
     const QModelIndex index = indexAt(event->pos());
     setDirtyRegion(m_dropRect);
     m_dropRect = visualRect(index);
@@ -188,26 +242,35 @@ void ColumnWidget::dropEvent(QDropEvent* event)
     if (!urls.isEmpty()) {
         event->acceptProposedAction();
         m_view->m_controller->indicateDroppedUrls(urls,
-                                                        indexAt(event->pos()),
-                                                        event->source());
+                                                  url(),
+                                                  indexAt(event->pos()),
+                                                  event->source());
     }
     QListView::dropEvent(event);
     m_dragging = false;
 }
 
-void ColumnWidget::mousePressEvent(QMouseEvent* event)
+void ColumnWidget::paintEvent(QPaintEvent* event)
 {
-    if (m_active || indexAt(event->pos()).isValid()) {
-        // Only accept the mouse press event in inactive views,
-        // if a click is done on an item. This assures that
-        // the current selection, which usually shows the
-        // the directory for next column, won't get deleted.
-        QListView::mousePressEvent(event);
+    if (!m_childUrl.isEmpty()) {
+        // indicate the shown URL of the next column by highlighting the shown folder item
+        const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
+        const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
+        if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
+            const QRect itemRect = visualRect(proxyIndex);
+            QPainter painter(viewport());
+            painter.save();
+
+            QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
+            color.setAlpha(32);
+            painter.setPen(Qt::NoPen);
+            painter.setBrush(color);
+            painter.drawRect(itemRect);
+
+            painter.restore();
+        }
     }
-}
 
-void ColumnWidget::paintEvent(QPaintEvent* event)
-{
     QListView::paintEvent(event);
 
     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
@@ -217,24 +280,39 @@ void ColumnWidget::paintEvent(QPaintEvent* event)
     }
 }
 
+void ColumnWidget::mousePressEvent(QMouseEvent* event)
+{
+    if (!m_active) {
+        m_view->requestActivation(this);
+    }
+
+    QListView::mousePressEvent(event);
+}
+
+void ColumnWidget::keyPressEvent(QKeyEvent* event)
+{
+    QListView::keyPressEvent(event);
+
+    const QItemSelectionModel* selModel = selectionModel();
+    const QModelIndex currentIndex = selModel->currentIndex();
+    const bool triggerItem = currentIndex.isValid()
+                             && (event->key() == Qt::Key_Return)
+                             && (selModel->selectedIndexes().count() <= 1);
+    if (triggerItem) {
+        m_view->m_controller->triggerItem(currentIndex);
+    }
+}
+
 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 {
-    if (m_view->viewport()->children().first() == this) {
-        // This column widget represents the root column. DolphinColumnView::createColumn()
-        // cannot retrieve the correct URL at this stage, as the directory lister will be
-        // started after the model has been assigned. This will be fixed here, where it is
-        // assured that the directory lister has been started already.
-        const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
-        const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
-        const KDirLister* dirLister = dirModel->dirLister();
-        m_url = dirLister->url();
+    if (!m_active) {
+        m_view->requestActivation(this);
     }
 
     QListView::contextMenuEvent(event);
 
     const QModelIndex index = indexAt(event->pos());
-    const KUrl& navigatorUrl = m_view->m_controller->url();
-    if (index.isValid() || (m_url == navigatorUrl)) {
+    if (index.isValid() || m_active) {
         // Only open a context menu above an item or if the mouse is above
         // the active column.
         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
@@ -242,51 +320,89 @@ void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
     }
 }
 
+void ColumnWidget::selectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
+{
+    QListView::selectionChanged(selected, deselected);
+
+    QItemSelectionModel* selModel = m_view->selectionModel();
+    selModel->select(selected, QItemSelectionModel::Select);
+    selModel->select(deselected, QItemSelectionModel::Deselect);
+}
+
 void ColumnWidget::activate()
 {
-    const QColor bgColor = KColorScheme(KColorScheme::View).background();
+    if (m_view->hasFocus()) {
+        setFocus(Qt::OtherFocusReason);
+    }
+    m_view->setFocusProxy(this);
+
+    // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
+    // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
+    // necessary connecting the signal 'singleClick()' or 'doubleClick'.
+    if (KGlobalSettings::singleClick()) {
+        connect(this, SIGNAL(clicked(const QModelIndex&)),
+                m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
+    } else {
+        connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
+                m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
+    }
+
+    const QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
     QPalette palette = viewport()->palette();
     palette.setColor(viewport()->backgroundRole(), bgColor);
     viewport()->setPalette(palette);
 
-    setSelectionMode(MultiSelection);
+    if (!m_childUrl.isEmpty()) {
+        // assure that the current index is set on the index that represents
+        // the child URL
+        const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
+        const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
+        selectionModel()->setCurrentIndex(proxyIndex, QItemSelectionModel::Current);
+    }
+
+    update();
 }
 
 void ColumnWidget::deactivate()
 {
-    QColor bgColor = KColorScheme(KColorScheme::View).background();
-    const QColor fgColor = KColorScheme(KColorScheme::View).foreground();
-    bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
+    // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
+    // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
+    // necessary connecting the signal 'singleClick()' or 'doubleClick'.
+    if (KGlobalSettings::singleClick()) {
+        disconnect(this, SIGNAL(clicked(const QModelIndex&)),
+                   m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
+    } else {
+        disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
+                   m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
+    }
 
-    QPalette palette = viewport()->palette();
-    palette.setColor(viewport()->backgroundRole(), bgColor);
+    const QPalette palette = m_view->viewport()->palette();
     viewport()->setPalette(palette);
 
-    setSelectionMode(SingleSelection);
+    selectionModel()->clear();
+    update();
 }
 
 // ---
 
 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
-    QColumnView(parent),
-    m_controller(controller)
+    QAbstractItemView(parent),
+    m_controller(controller),
+    m_restoreActiveColumnFocus(false),
+    m_index(-1),
+    m_contentX(0),
+    m_columns(),
+    m_animation(0),
+    m_dolphinModel(0),
+    m_proxyModel(0)
 {
     Q_ASSERT(controller != 0);
 
     setAcceptDrops(true);
-    setSelectionBehavior(SelectItems);
     setDragDropMode(QAbstractItemView::DragDrop);
     setDropIndicatorShown(false);
+    setSelectionMode(ExtendedSelection);
 
-    if (KGlobalSettings::singleClick()) {
-        connect(this, SIGNAL(clicked(const QModelIndex&)),
-                this, SLOT(triggerItem(const QModelIndex&)));
-    } else {
-        connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
-                this, SLOT(triggerItem(const QModelIndex&)));
-    }
-    connect(this, SIGNAL(activated(const QModelIndex&)),
-            this, SLOT(triggerItem(const QModelIndex&)));
     connect(this, SIGNAL(entered(const QModelIndex&)),
             controller, SLOT(emitItemEntered(const QModelIndex&)));
     connect(this, SIGNAL(viewportEntered()),
@@ -295,108 +411,329 @@ DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* control
             this, SLOT(zoomIn()));
     connect(controller, SIGNAL(zoomOut()),
             this, SLOT(zoomOut()));
+    connect(controller, SIGNAL(urlChanged(const KUrl&)),
+            this, SLOT(showColumn(const KUrl&)));
+
+    connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
+            this, SLOT(moveContentHorizontally(int)));
+
+    m_animation = new QTimeLine(500, this);
+    connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
+
+    ColumnWidget* column = new ColumnWidget(viewport(), this, m_controller->url());
+    m_columns.append(column);
+    setActiveColumnIndex(0);
 
     updateDecorationSize();
+
+    // dim the background of the viewport
+    QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
+    const QColor fgColor = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
+    bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
+
+    QPalette palette = viewport()->palette();
+    palette.setColor(viewport()->backgroundRole(), bgColor);
+    viewport()->setPalette(palette);
 }
 
 DolphinColumnView::~DolphinColumnView()
 {
 }
 
-QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
+QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
+{
+    foreach (ColumnWidget* column, m_columns) {
+        const QPoint topLeft = column->frameGeometry().topLeft();
+        const QPoint adjustedPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
+        const QModelIndex index = column->indexAt(adjustedPoint);
+        if (index.isValid()) {
+            return index;
+        }
+    }
+
+    return QModelIndex();
+}
+
+void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 {
-    // To be able to visually indicate whether a column is active (which means
-    // that it represents the content of the URL navigator), the column
-    // must remember its URL.
-    const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
-    const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
+    activeColumn()->scrollTo(index, hint);
+}
 
-    const QModelIndex dirModelIndex = proxyModel->mapToSource(index);
-    KFileItem* fileItem = dirModel->itemForIndex(dirModelIndex);
+QRect DolphinColumnView::visualRect(const QModelIndex& index) const
+{
+    return activeColumn()->visualRect(index);
+}
 
-    KUrl columnUrl;
-    if (fileItem != 0) {
-        columnUrl = fileItem->url();
+void DolphinColumnView::setModel(QAbstractItemModel* model)
+{
+    if (m_dolphinModel != 0) {
+        m_dolphinModel->disconnect(this);
     }
 
-    ColumnWidget* view = new ColumnWidget(viewport(),
-                                          this,
-                                          columnUrl);
+    m_proxyModel = static_cast<QAbstractProxyModel*>(model);
+    m_dolphinModel = static_cast<DolphinModel*>(m_proxyModel->sourceModel());
+    connect(m_dolphinModel, SIGNAL(expand(const QModelIndex&)),
+            this, SLOT(triggerReloadColumns(const QModelIndex&)));
 
-    // The following code has been copied 1:1 from QColumnView::createColumn().
-    // Copyright (C) 1992-2007 Trolltech ASA. In Qt 4.4 the new method
-    // QColumnView::initializeColumn() will be available for this.
+    KDirLister* dirLister = m_dolphinModel->dirLister();
+    connect(dirLister, SIGNAL(completed()),
+            this, SLOT(triggerExpandToActiveUrl()));
 
-    view->setFrameShape(QFrame::NoFrame);
-    view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
-    view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
-    view->setMinimumWidth(100);
-    view->setAttribute(Qt::WA_MacShowFocusRect, false);
+    activeColumn()->setModel(model);
+    QAbstractItemView::setModel(model);
+}
 
-    // copy the 'view' behavior
-    view->setDragDropMode(dragDropMode());
-    view->setDragDropOverwriteMode(dragDropOverwriteMode());
-    view->setDropIndicatorShown(showDropIndicator());
-    view->setAlternatingRowColors(alternatingRowColors());
-    view->setAutoScroll(hasAutoScroll());
-    view->setEditTriggers(editTriggers());
-    view->setHorizontalScrollMode(horizontalScrollMode());
-    view->setIconSize(iconSize());
-    view->setSelectionBehavior(selectionBehavior());
-    view->setSelectionMode(selectionMode());
-    view->setTabKeyNavigation(tabKeyNavigation());
-    view->setTextElideMode(textElideMode());
-    view->setVerticalScrollMode(verticalScrollMode());
+void DolphinColumnView::invertSelection()
+{
+    // TODO: this approach of inverting the selection is quite slow. It should
+    // be possible to speedup the implementation by using QItemSelection, but
+    // all adempts have failed yet...
+
+    ColumnWidget* column = activeColumn();
+    QItemSelectionModel* selModel = column->selectionModel();
+
+    KDirLister* dirLister = m_dolphinModel->dirLister();
+    const KFileItemList list = dirLister->itemsForDir(column->url());
+    foreach (const KFileItem item, list) {
+        const QModelIndex index = m_dolphinModel->indexForUrl(item.url());
+        selModel->select(m_proxyModel->mapFromSource(index), QItemSelectionModel::Toggle);
+    }
+}
 
-    view->setModel(model());
+void DolphinColumnView::reload()
+{
+    // Due to the reloading of the model all columns will be reset to show
+    // the same content as the first column. As this is not wanted, all columns
+    // except of the first column are temporary hidden until the root index can
+    // be updated again.
+    m_restoreActiveColumnFocus = false;
+    QList<ColumnWidget*>::iterator start = m_columns.begin() + 1;
+    QList<ColumnWidget*>::iterator end = m_columns.end();
+    for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
+        ColumnWidget* column = (*it);
+        if (column->isActive() && column->hasFocus()) {
+            // because of hiding the column, it will lose the focus
+            // -> remember that the focus should be restored after reloading
+            m_restoreActiveColumnFocus = true;
+        }
+        column->hide();
+    }
 
-    // set the delegate to be the columnview delegate
-    QAbstractItemDelegate* delegate = view->itemDelegate();
-    view->setItemDelegate(itemDelegate());
-    delete delegate;
+    // all columns are hidden, now reload the directory lister
+    KDirLister* dirLister = m_dolphinModel->dirLister();
+    const KUrl& rootUrl = m_columns[0]->url();
+    dirLister->openUrl(rootUrl, false, true);
+    updateColumns();
+}
 
-    view->setRootIndex(index);
+void DolphinColumnView::showColumn(const KUrl& url)
+{
+    const KUrl& rootUrl = m_columns[0]->url();
+    if (!rootUrl.isParentOf(url)) {
+        // the URL is no child URL of the column view, hence clear all columns
+        // and reset the root column
+        QList<ColumnWidget*>::iterator start = m_columns.begin() + 1;
+        QList<ColumnWidget*>::iterator end = m_columns.end();
+        for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
+            (*it)->deleteLater();
+        }
+        m_columns.erase(start, end);
+        m_index = 0;
+        m_columns[0]->setActive(true);
+        m_columns[0]->setUrl(url);
+        assureVisibleActiveColumn();
+        return;
+    }
 
-    if (model()->canFetchMore(index)) {
-        model()->fetchMore(index);
+    KDirLister* dirLister = m_dolphinModel->dirLister();
+    const KUrl dirListerUrl = dirLister->url();
+    if (dirListerUrl != rootUrl) {
+        // It is possible that root URL of the directory lister is adjusted
+        // after creating the column widget (e. g. when restoring the history
+        // having a different root URL than the controller indicates).
+        m_columns[0]->setUrl(dirListerUrl);
     }
 
-    return view;
+    int columnIndex = 0;
+    foreach (ColumnWidget* column, m_columns) {
+        if (column->url() == url) {
+            // the column represents already the requested URL, hence activate it
+            requestActivation(column);
+            return;
+        } else if (!column->url().isParentOf(url)) {
+            // the column is no parent of the requested URL, hence
+            // just delete all remaining columns
+            if (columnIndex > 0) {
+                QList<ColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
+                QList<ColumnWidget*>::iterator end = m_columns.end();
+                for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
+                    (*it)->deleteLater();
+                }
+                m_columns.erase(start, end);
+
+                const int maxIndex = m_columns.count() - 1;
+                Q_ASSERT(maxIndex >= 0);
+                if (m_index > maxIndex) {
+                    m_index = maxIndex;
+                }
+                break;
+            }
+        }
+        ++columnIndex;
+    }
+
+    // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
+    // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
+    // "c" will be created.
+    const int lastIndex = m_columns.count() - 1;
+    Q_ASSERT(lastIndex >= 0);
+
+    const KUrl& activeUrl = m_columns[lastIndex]->url();
+    Q_ASSERT(activeUrl.isParentOf(url));
+    Q_ASSERT(activeUrl != url);
+
+    QString path = activeUrl.url(KUrl::AddTrailingSlash);
+    const QString targetPath = url.url(KUrl::AddTrailingSlash);
+
+    columnIndex = lastIndex;
+    int slashIndex = path.count('/');
+    bool hasSubPath = (slashIndex >= 0);
+    while (hasSubPath) {
+        const QString subPath = targetPath.section('/', slashIndex, slashIndex);
+        if (subPath.isEmpty()) {
+            hasSubPath = false;
+        } else {
+            path += subPath + '/';
+            ++slashIndex;
+
+            const KUrl childUrl = KUrl(path);
+            const QModelIndex dirIndex = m_dolphinModel->indexForUrl(KUrl(path));
+            const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
+
+            m_columns[columnIndex]->setChildUrl(childUrl);
+            columnIndex++;
+
+            ColumnWidget* column = new ColumnWidget(viewport(), this, childUrl);
+            column->setModel(model());
+            column->setRootIndex(proxyIndex);
+            column->setActive(false);
+
+            m_columns.append(column);
+
+            // Before invoking layoutColumns() the column must be set visible temporary.
+            // To prevent a flickering the initial geometry is set to a hidden position.
+            column->setGeometry(QRect(-1, -1, 1, 1));
+            column->show();
+            layoutColumns();
+            updateScrollBar();
+
+            // the layout is finished, now let the column be invisible until it
+            // gets a valid root index due to expandToActiveUrl()
+            column->hide();
+        }
+    }
+
+    // set the last column as active column without modifying the controller
+    // and hence the history
+    activeColumn()->setActive(false);
+    m_index = columnIndex;
+    activeColumn()->setActive(true);
+    assureVisibleActiveColumn();
 }
 
-void DolphinColumnView::mousePressEvent(QMouseEvent* event)
+void DolphinColumnView::selectAll()
 {
-    m_controller->triggerActivation();
-    QColumnView::mousePressEvent(event);
+    activeColumn()->selectAll();
 }
 
-void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
+bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 {
-    if (event->mimeData()->hasUrls()) {
-        event->acceptProposedAction();
-    }
+    Q_UNUSED(index);
+    return false;//activeColumn()->isIndexHidden(index);
 }
 
-void DolphinColumnView::dropEvent(QDropEvent* event)
+QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 {
-    const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
-    if (!urls.isEmpty()) {
-        m_controller->indicateDroppedUrls(urls,
-                                          indexAt(event->pos()),
-                                          event->source());
-        event->acceptProposedAction();
+    // Parts of this code have been taken from QColumnView::moveCursor().
+    // Copyright (C) 1992-2007 Trolltech ASA.
+
+    Q_UNUSED(modifiers);
+    if (model() == 0) {
+        return QModelIndex();
     }
-    QColumnView::dropEvent(event);
+
+    const QModelIndex current = currentIndex();
+    if (isRightToLeft()) {
+        if (cursorAction == MoveLeft) {
+            cursorAction = MoveRight;
+        } else if (cursorAction == MoveRight) {
+            cursorAction = MoveLeft;
+        }
+    }
+
+    switch (cursorAction) {
+    case MoveLeft:
+        if (m_index > 0) {
+            setActiveColumnIndex(m_index - 1);
+        }
+        break;
+
+    case MoveRight:
+        if (m_index < m_columns.count() - 1) {
+            setActiveColumnIndex(m_index + 1);
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return QModelIndex();
+}
+
+void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
+{
+    Q_UNUSED(rect);
+    Q_UNUSED(flags);
+    //activeColumn()->setSelection(rect, flags);
+}
+
+QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
+{
+    Q_UNUSED(selection);
+    return QRegion(); //activeColumn()->visualRegionForSelection(selection);
+}
+
+int DolphinColumnView::horizontalOffset() const
+{
+    return -m_contentX;
+}
+
+int DolphinColumnView::verticalOffset() const
+{
+    return 0;
+}
+
+void DolphinColumnView::mousePressEvent(QMouseEvent* event)
+{
+    m_controller->triggerActivation();
+    QAbstractItemView::mousePressEvent(event);
+}
+
+void DolphinColumnView::resizeEvent(QResizeEvent* event)
+{
+    QAbstractItemView::resizeEvent(event);
+    layoutColumns();
+    updateScrollBar();
 }
 
 void DolphinColumnView::zoomIn()
 {
     if (isZoomInPossible()) {
         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-        // TODO: get rid of K3Icon sizes
         switch (settings->iconSize()) {
-        case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
-        case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
+        case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
+        case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
         default: Q_ASSERT(false); break;
         }
         updateDecorationSize();
@@ -407,59 +744,187 @@ void DolphinColumnView::zoomOut()
 {
     if (isZoomOutPossible()) {
         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-        // TODO: get rid of K3Icon sizes
         switch (settings->iconSize()) {
-        case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
-        case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
+        case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
+        case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
         default: Q_ASSERT(false); break;
         }
         updateDecorationSize();
     }
 }
 
-void DolphinColumnView::triggerItem(const QModelIndex& index)
+void DolphinColumnView::moveContentHorizontally(int x)
 {
-    m_controller->triggerItem(index);
+    m_contentX = isRightToLeft() ? +x : -x;
+    layoutColumns();
+}
+
+void DolphinColumnView::updateDecorationSize()
+{
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    const int iconSize = settings->iconSize();
 
-    // Update the activation state of all columns. Only the column
-    // which represents the URL of the URL navigator is marked as active.
-    const KUrl& navigatorUrl = m_controller->url();
     foreach (QObject* object, viewport()->children()) {
         if (object->inherits("QListView")) {
             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
-            widget->setActive(navigatorUrl == widget->url());
+            widget->setDecorationSize(QSize(iconSize, iconSize));
         }
     }
+
+    m_controller->setZoomInPossible(isZoomInPossible());
+    m_controller->setZoomOutPossible(isZoomOutPossible());
+
+    doItemsLayout();
+}
+
+void DolphinColumnView::expandToActiveUrl()
+{
+    const int lastIndex = m_columns.count() - 1;
+    Q_ASSERT(lastIndex >= 0);
+    const KUrl& activeUrl = m_columns[lastIndex]->url();
+    const KUrl rootUrl = m_dolphinModel->dirLister()->url();
+    const bool expand = rootUrl.isParentOf(activeUrl)
+                        && !rootUrl.equals(activeUrl, KUrl::CompareWithoutTrailingSlash);
+    if (expand) {
+        m_dolphinModel->expandToUrl(activeUrl);
+    }
+    updateColumns();
+}
+
+void DolphinColumnView::triggerUpdateColumns(const QModelIndex& index)
+{
+    Q_UNUSED(index);
+    // the updating of the columns may not be done in the context of this slot
+    QMetaObject::invokeMethod(this, "updateColumns", Qt::QueuedConnection);
+}
+
+void DolphinColumnView::updateColumns()
+{
+    const int end = m_columns.count() - 2; // next to last column
+    for (int i = 0; i <= end; ++i) {
+        ColumnWidget* nextColumn = m_columns[i + 1];
+        const QModelIndex rootIndex = nextColumn->rootIndex();
+        if (rootIndex.isValid()) {
+            nextColumn->show();
+        } else {
+            const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_columns[i]->childUrl());
+            const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
+            if (proxyIndex.isValid()) {
+                nextColumn->setRootIndex(proxyIndex);
+                nextColumn->show();
+                if (nextColumn->isActive() && m_restoreActiveColumnFocus) {
+                    nextColumn->setFocus();
+                    m_restoreActiveColumnFocus = false;
+                }
+            }
+        }
+    }
+}
+
+void DolphinColumnView::triggerExpandToActiveUrl()
+{
+    QMetaObject::invokeMethod(this, "expandToActiveUrl", Qt::QueuedConnection);
 }
 
 bool DolphinColumnView::isZoomInPossible() const
 {
     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    return settings->iconSize() < K3Icon::SizeLarge;
+    return settings->iconSize() < KIconLoader::SizeLarge;
 }
 
 bool DolphinColumnView::isZoomOutPossible() const
 {
     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    return settings->iconSize() > K3Icon::SizeSmall;
+    return settings->iconSize() > KIconLoader::SizeSmall;
 }
 
-void DolphinColumnView::updateDecorationSize()
+void DolphinColumnView::setActiveColumnIndex(int index)
 {
-    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    const int iconSize = settings->iconSize();
+    if (m_index == index) {
+        return;
+    }
 
-    foreach (QObject* object, viewport()->children()) {
-        if (object->inherits("QListView")) {
-            ColumnWidget* widget = static_cast<ColumnWidget*>(object);
-            widget->setDecorationSize(QSize(iconSize, iconSize));
+    const bool hasActiveColumn = (m_index >= 0);
+    if (hasActiveColumn) {
+        m_columns[m_index]->setActive(false);
+    }
+
+    m_index = index;
+    m_columns[m_index]->setActive(true);
+
+    m_controller->setUrl(m_columns[m_index]->url());
+
+    assureVisibleActiveColumn();
+}
+
+void DolphinColumnView::layoutColumns()
+{
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    const int columnWidth = settings->columnWidth();
+    if (isRightToLeft()) {
+        int x = viewport()->width() - columnWidth + m_contentX;
+        foreach (ColumnWidget* column, m_columns) {
+            column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
+            x -= columnWidth;
+        }
+    } else {
+        int x = m_contentX;
+        foreach (ColumnWidget* column, m_columns) {
+            column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
+            x += columnWidth;
         }
     }
+}
 
-    m_controller->setZoomInPossible(isZoomInPossible());
-    m_controller->setZoomOutPossible(isZoomOutPossible());
+void DolphinColumnView::updateScrollBar()
+{
+    int contentWidth = 0;
+    foreach (ColumnWidget* column, m_columns) {
+        contentWidth += column->width();
+    }
 
-    doItemsLayout();
+    horizontalScrollBar()->setPageStep(contentWidth);
+    horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
+}
+
+void DolphinColumnView::assureVisibleActiveColumn()
+{
+    const int viewportWidth = viewport()->width();
+    const int x = activeColumn()->x();
+    const int width = activeColumn()->width();
+    if (x + width > viewportWidth) {
+        const int newContentX = m_contentX - x - width + viewportWidth;
+        if (isRightToLeft()) {
+            m_animation->setFrameRange(m_contentX, newContentX);
+        } else {
+            m_animation->setFrameRange(-m_contentX, -newContentX);
+        }
+        m_animation->start();
+    } else if (x < 0) {
+        const int newContentX = m_contentX - x;
+        if (isRightToLeft()) {
+            m_animation->setFrameRange(m_contentX, newContentX);
+        } else {
+            m_animation->setFrameRange(-m_contentX, -newContentX);
+        }
+        m_animation->start();
+    }
+}
+
+void DolphinColumnView::requestActivation(ColumnWidget* column)
+{
+    if (column->isActive()) {
+        assureVisibleActiveColumn();
+    } else {
+        int index = 0;
+        foreach (ColumnWidget* currColumn, m_columns) {
+            if (currColumn == column) {
+                setActiveColumnIndex(index);
+                return;
+            }
+            ++index;
+        }
+    }
 }
 
 #include "dolphincolumnview.moc"