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[dolphin.git] / src / dolphiniconsview.cpp
index 2576abba8ed357bf368cfd1962e244067a70975c..0dd7dd7190ebb85fd697180770d8220d38679b6d 100644 (file)
@@ -1,6 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2006 by Peter Penz                                      *
- *   peter.penz@gmx.at                                                     *
+ *   Copyright (C) 2006 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  *
  *   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.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  ***************************************************************************/
 
 #include "dolphiniconsview.h"
-#include <qpainter.h>
-//Added by qt3to4:
-#include <QDragMoveEvent>
-#include <QDropEvent>
-#include <Q3ValueList>
-#include <QPixmap>
-#include <QMouseEvent>
-#include <QDragEnterEvent>
-#include <kiconeffect.h>
-#include <kapplication.h>
-#include <qobject.h>
-#include <kglobalsettings.h>
-#include <kurldrag.h>
-#include <qclipboard.h>
-#include <assert.h>
-#include <kaction.h>
-#include <kstdaction.h>
-#include <kfileitem.h>
-
-#include "dolphinview.h"
-#include "viewproperties.h"
-#include "dolphin.h"
-#include "dolphinstatusbar.h"
-#include "dolphinsettings.h"
-#include "iconsmodesettings.h"
 
-DolphinIconsView::DolphinIconsView(DolphinView* parent, LayoutMode layoutMode) :
-    KFileIconView(parent, 0),
-    m_previewIconSize(-1),
-    m_layoutMode(layoutMode),
-    m_dolphinView(parent)
+#include "dolphincategorydrawer.h"
+#include "dolphincontroller.h"
+#include "dolphinsettings.h"
+#include "dolphin_iconsmodesettings.h"
+#include "dolphin_generalsettings.h"
+#include "draganddrophelper.h"
+#include "selectionmanager.h"
+#include "zoomlevelinfo.h"
+
+#include <kcategorizedsortfilterproxymodel.h>
+#include <kdialog.h>
+#include <kdirmodel.h>
+#include <kfileitemdelegate.h>
+
+#include <QAbstractProxyModel>
+#include <QApplication>
+#include <QScrollBar>
+
+DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
+    KCategorizedView(parent),
+    m_enableScrollTo(false),
+    m_controller(controller),
+    m_selectionManager(0),
+    m_categoryDrawer(0),
+    m_font(),
+    m_decorationSize(),
+    m_decorationPosition(QStyleOptionViewItem::Top),
+    m_displayAlignment(Qt::AlignHCenter),
+    m_itemSize(),
+    m_dropRect()
 {
-    setAcceptDrops(true);
-    setMode(KIconView::Execute);
-    setSelectionMode(KFile::Extended);
-    Dolphin& dolphin = Dolphin::mainWin();
-
-    connect(this, SIGNAL(onItem(Q3IconViewItem*)),
-            this, SLOT(slotOnItem(Q3IconViewItem*)));
-    connect(this, SIGNAL(onViewport()),
-            this, SLOT(slotOnViewport()));
-    connect(this, SIGNAL(contextMenuRequested(Q3IconViewItem*, const QPoint&)),
-            this, SLOT(slotContextMenuRequested(Q3IconViewItem*, const QPoint&)));
-    connect(this, SIGNAL(selectionChanged()),
-            &dolphin, SLOT(slotSelectionChanged()));
-    connect(&dolphin, SIGNAL(activeViewChanged()),
-            this, SLOT(slotActivationUpdate()));
-    connect(this, SIGNAL(itemRenamed(Q3IconViewItem*, const QString&)),
-            this, SLOT(slotItemRenamed(Q3IconViewItem*, const QString&)));
-    connect(this, SIGNAL(dropped(QDropEvent*, const KURL::List&, const KURL&)),
-            parent, SLOT(slotURLListDropped(QDropEvent*, const KURL::List&, const KURL&)));
-
-    QClipboard* clipboard = QApplication::clipboard();
-    connect(clipboard, SIGNAL(dataChanged()),
-            this, SLOT(slotUpdateDisabledItems()));
-
-    // KFileIconView creates two actions for zooming, which are directly connected to the
-    // slots KFileIconView::zoomIn() and KFileIconView::zoomOut(). As this behavior is not
-    // wanted and the slots are not virtual, the actions are disabled here.
-    KAction* zoomInAction = actionCollection()->action("zoomIn");
-    assert(zoomInAction != 0);
-    zoomInAction->setEnabled(false);
-
-    KAction* zoomOutAction = actionCollection()->action("zoomOut");
-    assert(zoomOutAction != 0);
-    zoomOutAction->setEnabled(false);
-
-    setItemsMovable(true);
-    setWordWrapIconText(true);
-    if (m_layoutMode == Previews) {
-        showPreviews();
+    Q_ASSERT(controller != 0);
+    setLayoutDirection(Qt::LeftToRight);
+    setViewMode(QListView::IconMode);
+    setResizeMode(QListView::Adjust);
+    setSpacing(KDialog::spacingHint());
+    setMovement(QListView::Static);
+    setDragEnabled(true);
+    setEditTriggers(QAbstractItemView::NoEditTriggers);
+    viewport()->setAcceptDrops(true);
+
+    setMouseTracking(true);
+
+    // 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' and to handle the
+    // RETURN-key in keyPressEvent().
+    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&)));
     }
-    refreshSettings();
-}
 
-DolphinIconsView::~DolphinIconsView()
-{
-}
-
-void DolphinIconsView::setLayoutMode(LayoutMode mode)
-{
-    if (m_layoutMode != mode) {
-        m_layoutMode = mode;
-        refreshSettings();
+    if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
+        m_selectionManager = new SelectionManager(this);
+        connect(m_selectionManager, SIGNAL(selectionChanged()),
+                this, SLOT(requestActivation()));
+        connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
+                m_selectionManager, SLOT(reset()));
     }
-}
-
-void DolphinIconsView::beginItemUpdates()
-{
-}
 
-void DolphinIconsView::endItemUpdates()
-{
-    arrangeItemsInGrid();
+    connect(this, SIGNAL(entered(const QModelIndex&)),
+            controller, SLOT(emitItemEntered(const QModelIndex&)));
+    connect(this, SIGNAL(viewportEntered()),
+            controller, SLOT(emitViewportEntered()));
+    connect(controller, SIGNAL(zoomLevelChanged(int)),
+            this, SLOT(setZoomLevel(int)));
 
-    // TODO: KFileIconView does not emit any signal when the preview
-    // has been finished. Using a delay of 300 ms is a temporary workaround
-    // until the DolphinIconsView will implement the previews by it's own in
-    // future releases.
-    QTimer::singleShot(300, this, SLOT(slotUpdateDisabledItems()));
+    const DolphinView* view = controller->dolphinView();
+    connect(view, SIGNAL(showPreviewChanged()),
+            this, SLOT(slotShowPreviewChanged()));
+    connect(view, SIGNAL(additionalInfoChanged()),
+            this, SLOT(slotAdditionalInfoChanged()));
 
-    const KFileIconViewItem* item = static_cast<const KFileIconViewItem*>(firstItem());
-    if (item != 0) {
-        setCurrentItem(item->fileInfo());
+    // apply the icons mode settings to the widget
+    const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
+    Q_ASSERT(settings != 0);
+
+    if (settings->useSystemFont()) {
+        m_font = KGlobalSettings::generalFont();
+    } else {
+        m_font = QFont(settings->fontFamily(),
+                       settings->fontSize(),
+                       settings->fontWeight(),
+                       settings->italicFont());
     }
 
-    int index = 0;
-    const Q3ValueList<URLNavigator::HistoryElem> history = m_dolphinView->urlHistory(index);
-    if (!history.isEmpty()) {
-        KFileView* fileView = static_cast<KFileView*>(this);
-        fileView->setCurrentItem(history[index].currentFileName());
-        setContentsPos(history[index].contentsX(), history[index].contentsY());
+    setWordWrap(settings->numberOfTextlines() > 1);
+    updateGridSize(view->showPreview(), 0);
+
+    if (settings->arrangement() == QListView::TopToBottom) {
+        setFlow(QListView::LeftToRight);
+        m_decorationPosition = QStyleOptionViewItem::Top;
+        m_displayAlignment = Qt::AlignHCenter;
+    } else {
+        setFlow(QListView::TopToBottom);
+        m_decorationPosition = QStyleOptionViewItem::Left;
+        m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
     }
+
+    m_categoryDrawer = new DolphinCategoryDrawer();
+    setCategoryDrawer(m_categoryDrawer);
+
+    setFocus();
+
+    connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
+            this, SLOT(updateFont()));
 }
 
-void DolphinIconsView::refreshSettings()
+DolphinIconsView::~DolphinIconsView()
 {
-    const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
-    assert(settings != 0);
-
-    setIconSize(settings->iconSize());
-
-    const Q3IconView::Arrangement arrangement = settings->arrangement() == "LeftToRight" ? // TODO: use enum directly in settings
-                                               Q3IconView::LeftToRight : Q3IconView::TopToBottom;
-    const Q3IconView::ItemTextPos textPos = (arrangement == Q3IconView::LeftToRight) ?
-                                           Q3IconView::Bottom :
-                                           Q3IconView::Right;
-    setArrangement(arrangement);
-    setItemTextPos(textPos);
-
-    // TODO: tempory crash; will get changed anyway for KDE 4
-    /*setGridX(settings->gridWidth());
-    setGridY(settings->gridHeight());
-    setSpacing(settings->gridSpacing());*/
-
-    QFont adjustedFont(font());
-    adjustedFont.setFamily(settings->fontFamily());
-    adjustedFont.setPointSize(settings->fontSize());
-    setFont(adjustedFont);
-    setIconTextHeight(settings->numberOfTexlines());
-
-    if (m_layoutMode == Previews) {
-        // There is no getter method for the current size in KFileIconView. To
-        // prevent a flickering the current size is stored in m_previewIconSize and
-        // setPreviewSize is only invoked if the size really has changed.
-        showPreviews();
-
-        const int size = settings->previewSize();
-        if (size != m_previewIconSize) {
-            m_previewIconSize = size;
-            setPreviewSize(size);
-        }
-    }
+    delete m_categoryDrawer;
+    m_categoryDrawer = 0;
 }
 
-void DolphinIconsView::zoomIn()
+void DolphinIconsView::scrollTo(const QModelIndex& index, ScrollHint hint)
 {
-    if (isZoomInPossible()) {
-        IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
-        const int textWidthHint = DolphinSettings::instance().textWidthHint(); // TODO: remove for KDE4
-
-        const int iconSize = increasedIconSize(settings->iconSize());
-        settings->setIconSize(iconSize);
-
-        if (m_layoutMode == Previews) {
-            const int previewSize = increasedIconSize(settings->previewSize());
-            settings->setPreviewSize(previewSize);
-        }
-
-        DolphinSettings::instance().calculateGridSize(textWidthHint); // TODO: remove for KDE4
-        ItemEffectsManager::zoomIn();
+    // Enable the QListView implementation of scrollTo() only if it has been
+    // triggered by a key press. Otherwise QAbstractItemView wants to scroll to the current
+    // index each time the layout has been changed. This becomes an issue when
+    // previews are loaded and the scrollbar is used: the scrollbar will always
+    // be reset to 0 on each new preview.
+    if (m_enableScrollTo || (state() != QAbstractItemView::NoState)) {
+        KCategorizedView::scrollTo(index, hint);
+        m_enableScrollTo = false;
     }
 }
 
-void DolphinIconsView::zoomOut()
+void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 {
-    if (isZoomOutPossible()) {
-        IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
-        const int textWidthHint = DolphinSettings::instance().textWidthHint(); // TODO: remove for KDE4
-
-        const int iconSize = decreasedIconSize(settings->iconSize());
-        settings->setIconSize(iconSize);
-
-        if (m_layoutMode == Previews) {
-            const int previewSize = decreasedIconSize(settings->previewSize());
-            settings->setPreviewSize(previewSize);
-        }
+    KCategorizedView::dataChanged(topLeft, bottomRight);
 
-        DolphinSettings::instance().calculateGridSize(textWidthHint); // TODO: remove for KDE4
-        ItemEffectsManager::zoomOut();
+    KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
+    if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
+        // bypass a QListView issue that items are not layout correctly if the decoration size of
+        // an index changes
+        scheduleDelayedItemsLayout();
     }
 }
 
-bool DolphinIconsView::isZoomInPossible() const
+QStyleOptionViewItem DolphinIconsView::viewOptions() const
 {
-    IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
-    const int size = (m_layoutMode == Icons) ? settings->iconSize() : settings->previewSize();
-    return size < KIcon::SizeEnormous;
+    QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
+    viewOptions.font = m_font;
+    viewOptions.decorationPosition = m_decorationPosition;
+    viewOptions.decorationSize = m_decorationSize;
+    viewOptions.displayAlignment = m_displayAlignment;
+    viewOptions.showDecorationSelected = true;
+    return viewOptions;
 }
 
-bool DolphinIconsView::isZoomOutPossible() const
+void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 {
-    IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
-    return settings->iconSize() > KIcon::SizeSmall;
+    KCategorizedView::contextMenuEvent(event);
+    m_controller->triggerContextMenuRequest(event->pos());
 }
 
-void DolphinIconsView::arrangeItemsInGrid( bool updated )
+void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 {
+    m_controller->requestActivation();
+    const QModelIndex index = indexAt(event->pos());
+    if (index.isValid() && (event->button() == Qt::LeftButton)) {
+        // TODO: It should not be necessary to manually set the dragging state, but I could
+        // not reproduce this issue with a Qt-only example yet to find the root cause.
+        // Issue description: start Dolphin, split the view and drag an item from the
+        // inactive view to the active view by a very fast mouse movement. Result:
+        // the item gets selected instead of being dragged...
+        setState(QAbstractItemView::DraggingState);
+    }
 
-    KFileIconView::arrangeItemsInGrid(updated);
-
-    if (m_layoutMode == Previews) {
-        // The class KFileIconView has a bug when the size of the previews differs from the size
-        // of the icons: For specific MIME types the y-position and the height is calculated in
-        // a wrong manner. The following code bypasses this issue. No bugreport has been submitted
-        // as this functionality is not used by any KDE3 application and the core developers are
-        // busy enough for KDE4 now :-)
-
-        KFileIconViewItem* item = static_cast<KFileIconViewItem*>(Q3IconView::firstItem());
-        QString mimetype;
-        while (item != 0) {
-            mimetype = item->fileInfo()->mimetype();
-            const bool fixSize = mimetype.contains("text") ||
-                                 mimetype.contains("application/x-");
-            if (fixSize) {
-                item->setPixmapSize(QSize(m_previewIconSize, m_previewIconSize));
-            }
-            item = static_cast<KFileIconViewItem *>(item->nextItem());
+    if (!index.isValid()) {
+        if (QApplication::mouseButtons() & Qt::MidButton) {
+            m_controller->replaceUrlByClipboard();
+        }
+        const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
+        if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
+            clearSelection();
         }
     }
-}
 
-void DolphinIconsView::setContextPixmap(void* context,
-                                        const QPixmap& pixmap)
-{
-    reinterpret_cast<KFileIconViewItem*>(context)->setPixmap(pixmap);
+    KCategorizedView::mousePressEvent(event);
 }
 
-const QPixmap* DolphinIconsView::contextPixmap(void* context)
+void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 {
-    return reinterpret_cast<KFileIconViewItem*>(context)->pixmap();
+    // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
+    // fix this in KDE 4.1
+    KCategorizedView::startDrag(supportedActions);
+    DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 }
 
-void* DolphinIconsView::firstContext()
+void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 {
-    return reinterpret_cast<void*>(firstItem());
+    if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
+        event->acceptProposedAction();
+    }
 }
 
-void* DolphinIconsView::nextContext(void* context)
+void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 {
-    KFileIconViewItem* iconViewItem = reinterpret_cast<KFileIconViewItem*>(context);
-    return reinterpret_cast<void*>(iconViewItem->nextItem());
+    KCategorizedView::dragLeaveEvent(event);
+    setDirtyRegion(m_dropRect);
 }
 
-KFileItem* DolphinIconsView::contextFileInfo(void* context)
+void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 {
-    return reinterpret_cast<KFileIconViewItem*>(context)->fileInfo();
-}
+    KCategorizedView::dragMoveEvent(event);
+
+    // 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.setSize(QSize()); // set as invalid
+    if (index.isValid()) {
+        const KFileItem item = m_controller->itemForIndex(index);
+        if (!item.isNull() && item.isDir()) {
+            m_dropRect = visualRect(index);
+        } else {
+            m_dropRect.setSize(QSize()); // set as invalid
+        }
+    }
+    if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
+        // accept url drops, independently from the destination item
+        event->acceptProposedAction();
+    }
 
-void DolphinIconsView::contentsMousePressEvent(QMouseEvent* event)
-{
-    KFileIconView::contentsMousePressEvent(event);
-    resetActivatedItem();
-    emit signalRequestActivation();
-    m_dolphinView->statusBar()->clear();
+    setDirtyRegion(m_dropRect);
 }
 
-void DolphinIconsView::contentsMouseReleaseEvent(QMouseEvent* event)
+void DolphinIconsView::dropEvent(QDropEvent* event)
 {
-    KFileIconView::contentsMouseReleaseEvent(event);
+    const QModelIndex index = indexAt(event->pos());
+    const KFileItem item = m_controller->itemForIndex(index);
+    m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 
-    // The KFileIconView does not send any selectionChanged signal if
-    // a selection is done by using the "select-during-button-pressed" feature.
-    // Hence inform Dolphin about the selection change manually:
-    Dolphin::mainWin().slotSelectionChanged();
+    KCategorizedView::dropEvent(event);
 }
 
-void DolphinIconsView::drawBackground(QPainter* painter, const QRect& rect)
+void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 {
-    if (m_dolphinView->isActive()) {
-        KFileIconView::drawBackground(painter, rect);
-    }
-    else {
-        const QBrush brush(colorGroup().background());
-        painter->fillRect(0, 0, width(), height(), brush);
-    }
+    KCategorizedView::keyPressEvent(event);
+    m_controller->handleKeyPressEvent(event);
+    m_enableScrollTo = true; // see DolphinIconsView::scrollTo()
 }
 
-Q3DragObject* DolphinIconsView::dragObject()
+void DolphinIconsView::wheelEvent(QWheelEvent* event)
 {
-    KURL::List urls;
-    KFileItemListIterator it(*KFileView::selectedItems());
-    while (it.current() != 0) {
-        urls.append((*it)->url());
-        ++it;
+    if (m_selectionManager != 0) {
+        m_selectionManager->reset();
     }
 
-    QPixmap pixmap;
-    if(urls.count() > 1) {
-        pixmap = DesktopIcon("kmultiple", iconSize());
-    }
-    else {
-        KFileIconViewItem* item = static_cast<KFileIconViewItem*>(currentItem());
-        if ((item != 0) && (item->pixmap() != 0)) {
-            pixmap = *(item->pixmap());
-        }
+    // let Ctrl+wheel events propagate to the DolphinView for icon zooming
+    if (event->modifiers() & Qt::ControlModifier) {
+        event->ignore();
+        return;
     }
-
-    if (pixmap.isNull()) {
-        pixmap = currentFileItem()->pixmap(iconSize());
+    KCategorizedView::wheelEvent(event);
+    // if the icons are aligned left to right, the vertical wheel event should
+    // be applied to the horizontal scrollbar
+    const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
+    const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
+                                  (settings->arrangement() == QListView::LeftToRight);
+    if (scrollHorizontal) {
+        QWheelEvent horizEvent(event->pos(),
+                               event->delta(),
+                               event->buttons(),
+                               event->modifiers(),
+                               Qt::Horizontal);
+        QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
     }
-
-    Q3DragObject* dragObj = new KURLDrag(urls, widget());
-    dragObj->setPixmap(pixmap);
-    return dragObj;
 }
 
-void DolphinIconsView::contentsDragEnterEvent(QDragEnterEvent* event)
+void DolphinIconsView::showEvent(QShowEvent* event)
 {
-    // TODO: The method KFileIconView::contentsDragEnterEvent() does
-    // not allow drag and drop inside itself, which prevents the possability
-    // to move a file into a directory. As the method KFileIconView::acceptDrag()
-    // is not virtual, we must overwrite the method
-    // KFileIconView::contentsDragEnterEvent() and do some cut/copy/paste for this
-    // usecase. Corresponding to the documentation the method KFileIconView::acceptDrag()
-    // will get virtual in KDE 4, which will simplify the code.
-
-    if (event->source() != this) {
-        KFileIconView::contentsDragEnterEvent(event);
-        return;
-    }
+    KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
+    delegate->setMaximumSize(m_itemSize);
 
-    const bool accept = KURLDrag::canDecode(event) &&
-                        (event->action() == QDropEvent::Copy ||
-                         event->action() == QDropEvent::Move ||
-                         event->action() == QDropEvent::Link );
-    if (accept) {
-        event->acceptAction();
-    }
-    else {
-        event->ignore();
-    }
+    KCategorizedView::showEvent(event);
 }
 
-void DolphinIconsView::contentsDragMoveEvent(QDragMoveEvent* event)
+void DolphinIconsView::leaveEvent(QEvent* event)
 {
-    KFileIconView::contentsDragMoveEvent(event);
-
-    // If a dragging is done above a directory, show the icon as 'active' for
-    // a visual feedback
-    KFileIconViewItem* item = static_cast<KFileIconViewItem*>(findItem(contentsToViewport(event->pos())));
-
-    bool showActive = false;
-    if (item != 0) {
-        const KFileItem* fileInfo = item->fileInfo();
-        showActive = (fileInfo != 0) && fileInfo->isDir();
-    }
+    KCategorizedView::leaveEvent(event);
+    // if the mouse is above an item and moved very fast outside the widget,
+    // no viewportEntered() signal might be emitted although the mouse has been moved
+    // above the viewport
+    m_controller->emitViewportEntered();
+}
 
-    if (showActive) {
-        slotOnItem(item);
-    }
-    else {
-        slotOnViewport();
-    }
+void DolphinIconsView::slotShowPreviewChanged()
+{
+    const DolphinView* view = m_controller->dolphinView();
+    updateGridSize(view->showPreview(), additionalInfoCount());
 }
 
-void DolphinIconsView::contentsDropEvent(QDropEvent* event)
+void DolphinIconsView::slotAdditionalInfoChanged()
 {
-    // TODO: Most of the following code is a copy of
-    // KFileIconView::contentsDropEvent. See comment in
-    // DolphinIconsView::contentsDragEnterEvent for details.
+    const DolphinView* view = m_controller->dolphinView();
+    const bool showPreview = view->showPreview();
+    updateGridSize(showPreview, view->additionalInfo().count());
+}
 
-    if (event->source() != this) {
-        KFileIconView::contentsDropEvent(event);
-        return;
-    }
+void DolphinIconsView::setZoomLevel(int level)
+{
+    IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 
-    KFileIconViewItem* item = static_cast<KFileIconViewItem*>(findItem(contentsToViewport(event->pos())));
-    const bool accept = KURLDrag::canDecode(event) &&
-                        (event->action() == QDropEvent::Copy ||
-                         event->action() == QDropEvent::Move ||
-                         event->action() == QDropEvent::Link ) &&
-                        (item != 0);
-    if (!accept) {
-        return;
-    }
+    const int oldIconSize = settings->iconSize();
+    int newIconSize = oldIconSize;
 
-    KFileItem* fileItem = item->fileInfo();
-    if (!fileItem->isDir()) {
-        // the file is not a directory, hence don't accept any drop
-        return;
+    const bool showPreview = m_controller->dolphinView()->showPreview();
+    if (showPreview) {
+        const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
+        settings->setPreviewSize(previewSize);
+    } else {
+        newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
+        settings->setIconSize(newIconSize);
     }
-    emit dropped(event, fileItem);
-    KURL::List urls;
-    if (KURLDrag::decode(event, urls) && !urls.isEmpty()) {
-        emit dropped(event, urls, fileItem != 0 ? fileItem->url() : KURL());
-        sig->dropURLs(fileItem, event, urls);
-    }
-}
 
-void DolphinIconsView::slotOnItem(Q3IconViewItem* item)
-{
-    assert(item != 0);
-    activateItem(reinterpret_cast<void*>(item));
+    // increase also the grid size
+    const int diff = newIconSize - oldIconSize;
+    settings->setItemWidth(settings->itemWidth() + diff);
+    settings->setItemHeight(settings->itemHeight() + diff);
 
-    KFileItem* fileItem = static_cast<KFileIconViewItem*>(item)->fileInfo();
-    m_dolphinView->requestItemInfo(fileItem->url());
+    updateGridSize(showPreview, additionalInfoCount());
 }
 
-void DolphinIconsView::slotOnViewport()
+void DolphinIconsView::requestActivation()
 {
-    resetActivatedItem();
-    m_dolphinView->requestItemInfo(KURL());
+    m_controller->requestActivation();
 }
 
-void DolphinIconsView::slotContextMenuRequested(Q3IconViewItem* item,
-                                                const QPoint& pos)
+void DolphinIconsView::updateFont()
 {
-    KFileItem* fileInfo = 0;
-    if (item != 0) {
-        fileInfo = static_cast<KFileIconViewItem*>(item)->fileInfo();
+    const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
+    Q_ASSERT(settings != 0);
+
+    if (settings->useSystemFont()) {
+        m_font = KGlobalSettings::generalFont();
     }
-    m_dolphinView->openContextMenu(fileInfo, pos);
 }
 
-void DolphinIconsView::slotItemRenamed(Q3IconViewItem* item,
-                                       const QString& name)
+void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 {
-    KFileItem* fileInfo = static_cast<KFileIconViewItem*>(item)->fileInfo();
-    m_dolphinView->rename(KURL(fileInfo->url()), name);
-}
+    const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
+    Q_ASSERT(settings != 0);
 
-void DolphinIconsView::slotActivationUpdate()
-{
-    update();
+    int itemWidth = settings->itemWidth();
+    int itemHeight = settings->itemHeight();
+    int size = settings->iconSize();
 
-    // TODO: there must be a simpler way to say
-    // "update all children"
-    const QObjectList* list = children();
-    if (list == 0) {
-        return;
+    if (showPreview) {
+        const int previewSize = settings->previewSize();
+        const int diff = previewSize - size;
+        itemWidth  += diff;
+        itemHeight += diff;
+
+        size = previewSize;
     }
 
-    QObjectListIterator it(*list);
-    QObject* object = 0;
-    while ((object = it.current()) != 0) {
-        if (object->inherits("QWidget")) {
-            QWidget* widget = static_cast<QWidget*>(object);
-            widget->update();
-        }
-        ++it;
+    Q_ASSERT(additionalInfoCount >= 0);
+    itemHeight += additionalInfoCount * m_font.pointSize() * 2;
+
+    if (settings->arrangement() == QListView::TopToBottom) {
+        // The decoration width indirectly defines the maximum
+        // width for the text wrapping. To use the maximum item width
+        // for text wrapping, it is used as decoration width.
+        m_decorationSize = QSize(itemWidth, size);
+        setIconSize(QSize(itemWidth, size));
+    } else {
+        m_decorationSize = QSize(size, size);
+        setIconSize(QSize(size, size));
     }
-}
 
-void DolphinIconsView::slotUpdateDisabledItems()
-{
-    updateDisabledItems();
-}
+    m_itemSize = QSize(itemWidth, itemHeight);
 
-int DolphinIconsView::increasedIconSize(int size) const
-{
-    int incSize = 0;
-    switch (size) {
-        case KIcon::SizeSmall:       incSize = KIcon::SizeSmallMedium; break;
-        case KIcon::SizeSmallMedium: incSize = KIcon::SizeMedium; break;
-        case KIcon::SizeMedium:      incSize = KIcon::SizeLarge; break;
-        case KIcon::SizeLarge:       incSize = KIcon::SizeHuge; break;
-        case KIcon::SizeHuge:        incSize = KIcon::SizeEnormous; break;
-        default: assert(false); break;
+    const int spacing = settings->gridSpacing();
+    setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
+
+    KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
+    if (delegate != 0) {
+        delegate->setMaximumSize(m_itemSize);
+    }
+
+    if (m_selectionManager != 0) {
+        m_selectionManager->reset();
     }
-    return incSize;
 }
 
-int DolphinIconsView::decreasedIconSize(int size) const
+int DolphinIconsView::additionalInfoCount() const
 {
-    int decSize = 0;
-    switch (size) {
-        case KIcon::SizeSmallMedium: decSize = KIcon::SizeSmall; break;
-        case KIcon::SizeMedium: decSize = KIcon::SizeSmallMedium; break;
-        case KIcon::SizeLarge: decSize = KIcon::SizeMedium; break;
-        case KIcon::SizeHuge: decSize = KIcon::SizeLarge; break;
-        case KIcon::SizeEnormous: decSize = KIcon::SizeHuge; break;
-        default: assert(false); break;
-    }
-    return decSize;
+    const DolphinView* view = m_controller->dolphinView();
+    return view->additionalInfo().count();
 }
 
 #include "dolphiniconsview.moc"