X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/70d7b5a0cdc2e4e95fb384c6e7ebd8c211b865c7..d6488887ecf69d7f192b94de8dce34fae0b7eb76:/src/dolphincolumnview.cpp

diff --git a/src/dolphincolumnview.cpp b/src/dolphincolumnview.cpp
index 5b6e4057a..e0d48e5fa 100644
--- a/src/dolphincolumnview.cpp
+++ b/src/dolphincolumnview.cpp
@@ -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  *
@@ -19,259 +19,338 @@
 
 #include "dolphincolumnview.h"
 
+#include "dolphinmodel.h"
+#include "dolphincolumnwidget.h"
 #include "dolphincontroller.h"
+#include "dolphindirlister.h"
+#include "dolphinmodel.h"
+#include "dolphinsortfilterproxymodel.h"
 #include "dolphinsettings.h"
 
 #include "dolphin_columnmodesettings.h"
 
-#include <QtGui/QAbstractProxyModel>
-#include <QtCore/QPoint>
+#include <kcolorutils.h>
+#include <kcolorscheme.h>
+#include <kdirlister.h>
 
-/**
- * Represents one column inside the DolphinColumnView and has been
- * extended to respect view options and hovering information.
- */
-class ColumnWidget : public QListView
-{
-public:
-    ColumnWidget(QWidget* parent, DolphinColumnView* columnView);
-    virtual ~ColumnWidget();
-
-    void setDecorationSize(const QSize& size);
-
-protected:
-    virtual QStyleOptionViewItem viewOptions() const;
-    virtual void dragEnterEvent(QDragEnterEvent* event);
-    virtual void dragLeaveEvent(QDragLeaveEvent* event);
-    virtual void dragMoveEvent(QDragMoveEvent* event);
-    virtual void dropEvent(QDropEvent* event);
-    virtual void paintEvent(QPaintEvent* event);
-
-private:
-    DolphinColumnView* m_columnView;
-    QStyleOptionViewItem m_viewOptions;
-
-    bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
-    QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
-};
+#include <QAbstractProxyModel>
+#include <QApplication>
+#include <QPoint>
+#include <QScrollBar>
+#include <QTimer>
+#include <QTimeLine>
 
-ColumnWidget::ColumnWidget(QWidget* parent, DolphinColumnView* columnView) :
-    QListView(parent),
-    m_columnView(columnView),
-    m_dragging(false),
-    m_dropRect()
+DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
+    QAbstractItemView(parent),
+    m_controller(controller),
+    m_active(false),
+    m_index(-1),
+    m_contentX(0),
+    m_columns(),
+    m_emptyViewport(0),
+    m_animation(0),
+    m_nameFilter()
 {
+    Q_ASSERT(controller != 0);
+
     setAcceptDrops(true);
-    setSelectionBehavior(SelectItems);
     setDragDropMode(QAbstractItemView::DragDrop);
     setDropIndicatorShown(false);
+    setSelectionMode(ExtendedSelection);
+    setFocusPolicy(Qt::NoFocus);
+    setFrameShape(QFrame::NoFrame);
 
-    setMouseTracking(true);
-    viewport()->setAttribute(Qt::WA_Hover);
+    connect(this, SIGNAL(viewportEntered()),
+            controller, SLOT(emitViewportEntered()));
+    connect(controller, SIGNAL(zoomIn()),
+            this, SLOT(zoomIn()));
+    connect(controller, SIGNAL(zoomOut()),
+            this, SLOT(zoomOut()));
+    connect(controller, SIGNAL(activationChanged(bool)),
+            this, SLOT(updateColumnsBackground(bool)));
 
-    // apply the column mode settings to the widget
-    const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    Q_ASSERT(settings != 0);
+    const DolphinView* view = controller->dolphinView();
+    connect(view, SIGNAL(showHiddenFilesChanged()),
+            this, SLOT(slotShowHiddenFilesChanged()));
+    connect(view, SIGNAL(showPreviewChanged()),
+            this, SLOT(slotShowPreviewChanged()));
 
-    m_viewOptions = QListView::viewOptions();
+    connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
+            this, SLOT(moveContentHorizontally(int)));
 
-    QFont font(settings->fontFamily(), settings->fontSize());
-    font.setItalic(settings->italicFont());
-    font.setBold(settings->boldFont());
-    m_viewOptions.font = font;
-}
+    m_animation = new QTimeLine(500, this);
+    connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
 
-ColumnWidget::~ColumnWidget()
-{
-}
+    DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, m_controller->url());
+    m_columns.append(column);
+    setActiveColumnIndex(0);
 
-void ColumnWidget::setDecorationSize(const QSize& size)
-{
-    m_viewOptions.decorationSize = size;
-    doItemsLayout();
+    m_emptyViewport = new QFrame(viewport());
+    m_emptyViewport->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+
+    updateDecorationSize();
+    updateColumnsBackground(true);
 }
 
-QStyleOptionViewItem ColumnWidget::viewOptions() const
+DolphinColumnView::~DolphinColumnView()
 {
-    return m_viewOptions;
 }
 
-void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
+QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
 {
-    if (event->mimeData()->hasUrls()) {
-        event->acceptProposedAction();
+    foreach (DolphinColumnWidget* 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;
+        }
     }
 
-    m_dragging = true;
+    return QModelIndex();
 }
 
-void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
+void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 {
-    QListView::dragLeaveEvent(event);
+    activeColumn()->scrollTo(index, hint);
+}
 
-    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
-    m_dragging = false;
-    setDirtyRegion(m_dropRect);
+QRect DolphinColumnView::visualRect(const QModelIndex& index) const
+{
+    return activeColumn()->visualRect(index);
 }
 
-void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
+void DolphinColumnView::invertSelection()
 {
-    QListView::dragMoveEvent(event);
+    QItemSelectionModel* selectionModel = activeColumn()->selectionModel();
+    const QAbstractItemModel* itemModel = selectionModel->model();
+
+    const QModelIndex topLeft = itemModel->index(0, 0);
+    const QModelIndex bottomRight = itemModel->index(itemModel->rowCount() - 1,
+                                                     itemModel->columnCount() - 1);
 
-   // 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);
-    setDirtyRegion(m_dropRect);
+    const QItemSelection selection(topLeft, bottomRight);
+    selectionModel->select(selection, QItemSelectionModel::Toggle);
 }
 
-void ColumnWidget::dropEvent(QDropEvent* event)
+void DolphinColumnView::reload()
 {
-    const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
-    if (!urls.isEmpty()) {
-        event->acceptProposedAction();
-        m_columnView->m_controller->indicateDroppedUrls(urls,
-                                                          indexAt(event->pos()),
-                                                          event->source());
+    foreach (DolphinColumnWidget* column, m_columns) {
+        column->reload();
     }
-    QListView::dropEvent(event);
-    m_dragging = false;
 }
 
-void ColumnWidget::paintEvent(QPaintEvent* event)
+void DolphinColumnView::setRootUrl(const KUrl& url)
 {
-    QListView::paintEvent(event);
+    removeAllColumns();
+    m_columns[0]->setUrl(url);
+}
 
-    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
-    if (m_dragging) {
-        const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
-        DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
+void DolphinColumnView::setNameFilter(const QString& nameFilter)
+{
+    if (nameFilter != m_nameFilter) {
+        m_nameFilter = nameFilter;
+        foreach (DolphinColumnWidget* column, m_columns) {
+            column->setNameFilter(nameFilter);
+        }
     }
 }
 
-// ---
+QString DolphinColumnView::nameFilter() const
+{
+    return m_nameFilter;
+}
 
-DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
-    QColumnView(parent),
-    m_controller(controller)
+KUrl DolphinColumnView::rootUrl() const
 {
-    Q_ASSERT(controller != 0);
+    return m_columns[0]->url();
+}
 
-    setAcceptDrops(true);
-    setSelectionBehavior(SelectItems);
-    setDragDropMode(QAbstractItemView::DragDrop);
-    setDropIndicatorShown(false);
+void DolphinColumnView::showColumn(const KUrl& url)
+{
+    if (!rootUrl().isParentOf(url)) {
+        setRootUrl(url);
+        return;
+    }
 
-    if (KGlobalSettings::singleClick()) {
-        connect(this, SIGNAL(clicked(const QModelIndex&)),
-                controller, SLOT(triggerItem(const QModelIndex&)));
-    } else {
-        connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
-                controller, SLOT(triggerItem(const QModelIndex&)));
+    int columnIndex = 0;
+    foreach (DolphinColumnWidget* column, m_columns) {
+        if (column->url() == url) {
+            // the column represents already the requested URL, hence activate it
+            requestActivation(column);
+            layoutColumns();
+            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<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
+                QList<DolphinColumnWidget*>::iterator end = m_columns.end();
+                for (QList<DolphinColumnWidget*>::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;
     }
-    connect(this, SIGNAL(activated(const QModelIndex&)),
-            controller, SLOT(triggerItem(const QModelIndex&)));
-    connect(this, SIGNAL(entered(const QModelIndex&)),
-            controller, SLOT(emitItemEntered(const QModelIndex&)));
-    connect(this, SIGNAL(viewportEntered()),
-            controller, SLOT(emitViewportEntered()));
-    connect(controller, SIGNAL(zoomIn()),
-            this, SLOT(zoomIn()));
-    connect(controller, SIGNAL(zoomOut()),
-            this, SLOT(zoomOut()));
 
-    updateDecorationSize();
+    // 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);
+            m_columns[columnIndex]->setChildUrl(childUrl);
+            columnIndex++;
+
+            DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
+            const QString filter = nameFilter();
+            if (!filter.isEmpty()) {
+                column->setNameFilter(filter);
+            }
+            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();
+        }
+    }
+
+    // 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();
 }
 
-DolphinColumnView::~DolphinColumnView()
+void DolphinColumnView::selectAll()
 {
+    activeColumn()->selectAll();
 }
 
-QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
+bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 {
-    ColumnWidget* view = new ColumnWidget(viewport(), this);
+    Q_UNUSED(index);
+    return false;//activeColumn()->isIndexHidden(index);
+}
 
-    // The following code has been copied 1:1 from QColumnView::createColumn().
+QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
+{
+    // Parts of this code have been taken from QColumnView::moveCursor().
     // Copyright (C) 1992-2007 Trolltech ASA.
-    // It would be nice if QColumnView would offer a protected method for this
-    // (already send input to Benjamin, hopefully possible in Qt4.4)
-
-    view->setFrameShape(QFrame::NoFrame);
-    view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
-    view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
-    view->setMinimumWidth(100);
-    view->setAttribute(Qt::WA_MacShowFocusRect, false);
-
-    // 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());
-
-    view->setModel(model());
-
-    // set the delegate to be the columnview delegate
-    QAbstractItemDelegate *delegate = view->itemDelegate();
-    view->setItemDelegate(itemDelegate());
-    delete delegate;
-
-    view->setRootIndex(index);
-
-    if (model()->canFetchMore(index)) {
-        model()->fetchMore(index);
+
+    Q_UNUSED(modifiers);
+    if (model() == 0) {
+        return QModelIndex();
     }
 
-    return view;
+    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);
+            m_controller->triggerUrlChangeRequest(activeColumn()->url());
+        }
+        break;
+
+    case MoveRight:
+        if (m_index < m_columns.count() - 1) {
+            setActiveColumnIndex(m_index + 1);
+            m_controller->triggerUrlChangeRequest(m_columns[m_index]->url());
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return QModelIndex();
 }
 
-void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
+void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 {
-    QColumnView::contextMenuEvent(event);
-    m_controller->triggerContextMenuRequest(event->pos());
+    Q_UNUSED(rect);
+    Q_UNUSED(flags);
+    //activeColumn()->setSelection(rect, flags);
 }
 
-void DolphinColumnView::mousePressEvent(QMouseEvent* event)
+QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 {
-    m_controller->triggerActivation();
-    QColumnView::mousePressEvent(event);
+    Q_UNUSED(selection);
+    return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 }
 
-void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
+int DolphinColumnView::horizontalOffset() const
 {
-    if (event->mimeData()->hasUrls()) {
-        event->acceptProposedAction();
-    }
+    return -m_contentX;
 }
 
-void DolphinColumnView::dropEvent(QDropEvent* event)
+int DolphinColumnView::verticalOffset() const
 {
-    const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
-    if (!urls.isEmpty()) {
-        m_controller->indicateDroppedUrls(urls,
-                                          indexAt(event->pos()),
-                                          event->source());
-        event->acceptProposedAction();
-    }
-    QColumnView::dropEvent(event);
+    return 0;
+}
+
+void DolphinColumnView::mousePressEvent(QMouseEvent* event)
+{
+    m_controller->requestActivation();
+    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();
@@ -282,26 +361,19 @@ 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();
     }
 }
 
-bool DolphinColumnView::isZoomInPossible() const
-{
-    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    return settings->iconSize() < K3Icon::SizeLarge;
-}
-
-bool DolphinColumnView::isZoomOutPossible() const
+void DolphinColumnView::moveContentHorizontally(int x)
 {
-    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
-    return settings->iconSize() > K3Icon::SizeSmall;
+    m_contentX = isRightToLeft() ? +x : -x;
+    layoutColumns();
 }
 
 void DolphinColumnView::updateDecorationSize()
@@ -311,7 +383,7 @@ void DolphinColumnView::updateDecorationSize()
 
     foreach (QObject* object, viewport()->children()) {
         if (object->inherits("QListView")) {
-            ColumnWidget* widget = static_cast<ColumnWidget*>(object);
+            DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
             widget->setDecorationSize(QSize(iconSize, iconSize));
         }
     }
@@ -322,4 +394,164 @@ void DolphinColumnView::updateDecorationSize()
     doItemsLayout();
 }
 
+void DolphinColumnView::updateColumnsBackground(bool active)
+{
+    if (active == m_active) {
+        return;
+    }
+
+    m_active = active;
+
+    // dim the background of the viewport
+    QPalette palette;
+    palette.setColor(viewport()->backgroundRole(), QColor(0, 0, 0, 0));
+    viewport()->setPalette(palette);
+
+    foreach (DolphinColumnWidget* column, m_columns) {
+        column->updateBackground();
+    }
+}
+
+void DolphinColumnView::slotShowHiddenFilesChanged()
+{
+    const bool show = m_controller->dolphinView()->showHiddenFiles();
+    foreach (DolphinColumnWidget* column, m_columns) {
+        column->setShowHiddenFiles(show);
+    }
+}
+
+void DolphinColumnView::slotShowPreviewChanged()
+{
+    const bool show = m_controller->dolphinView()->showPreview();
+    foreach (DolphinColumnWidget* column, m_columns) {
+        column->setShowPreview(show);
+    }
+}
+
+bool DolphinColumnView::isZoomInPossible() const
+{
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    return settings->iconSize() < KIconLoader::SizeLarge;
+}
+
+bool DolphinColumnView::isZoomOutPossible() const
+{
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    return settings->iconSize() > KIconLoader::SizeSmall;
+}
+
+void DolphinColumnView::setActiveColumnIndex(int index)
+{
+    if (m_index == index) {
+        return;
+    }
+
+    const bool hasActiveColumn = (m_index >= 0);
+    if (hasActiveColumn) {
+        m_columns[m_index]->setActive(false);
+    }
+
+    m_index = index;
+    m_columns[m_index]->setActive(true);
+
+    assureVisibleActiveColumn();
+}
+
+void DolphinColumnView::layoutColumns()
+{
+    const int gap = 4;
+
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    const int columnWidth = settings->columnWidth();
+
+    QRect emptyViewportRect;
+    if (isRightToLeft()) {
+        int x = viewport()->width() - columnWidth + m_contentX;
+        foreach (DolphinColumnWidget* column, m_columns) {
+            column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
+            x -= columnWidth;
+        }
+        emptyViewportRect = QRect(0, 0, x + columnWidth - gap, viewport()->height());
+    } else {
+        int x = m_contentX;
+        foreach (DolphinColumnWidget* column, m_columns) {
+            column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
+            x += columnWidth;
+        }
+        emptyViewportRect = QRect(x, 0, viewport()->width() - x - gap, viewport()->height());
+    }
+
+    if (emptyViewportRect.isValid()) {
+        m_emptyViewport->show();
+        m_emptyViewport->setGeometry(emptyViewportRect);
+    } else {
+        m_emptyViewport->hide();
+    }
+}
+
+void DolphinColumnView::updateScrollBar()
+{
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    const int contentWidth = m_columns.count() * settings->columnWidth();
+
+    horizontalScrollBar()->setPageStep(contentWidth);
+    horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
+}
+
+void DolphinColumnView::assureVisibleActiveColumn()
+{
+    const int viewportWidth = viewport()->width();
+    const int x = activeColumn()->x();
+
+    ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
+    const int width = settings->columnWidth();
+
+    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(DolphinColumnWidget* column)
+{
+    if (column->isActive()) {
+        assureVisibleActiveColumn();
+    } else {
+        int index = 0;
+        foreach (DolphinColumnWidget* currColumn, m_columns) {
+            if (currColumn == column) {
+                setActiveColumnIndex(index);
+                return;
+            }
+            ++index;
+        }
+    }
+}
+
+void DolphinColumnView::removeAllColumns()
+{
+    QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
+    QList<DolphinColumnWidget*>::iterator end = m_columns.end();
+    for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
+        (*it)->deleteLater();
+    }
+    m_columns.erase(start, end);
+    m_index = 0;
+    m_columns[0]->setActive(true);
+    assureVisibleActiveColumn();
+}
+
 #include "dolphincolumnview.moc"