X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/ec38f1cdb641f0b277100edd92b268ec856e2ece..dbfba7dfedc979469ec2be072c63d0dfcf7970ee:/src/kitemviews/kitemlistview.cpp

diff --git a/src/kitemviews/kitemlistview.cpp b/src/kitemviews/kitemlistview.cpp
index 1224ff6bd..15e0340c0 100644
--- a/src/kitemviews/kitemlistview.cpp
+++ b/src/kitemviews/kitemlistview.cpp
@@ -23,7 +23,6 @@
 #include "kitemlistview.h"
 
 #include "kitemlistcontroller.h"
-#include "kitemlistgroupheader.h"
 #include "kitemlistheader_p.h"
 #include "kitemlistrubberband_p.h"
 #include "kitemlistselectionmanager.h"
@@ -53,6 +52,7 @@ namespace {
 
 KItemListView::KItemListView(QGraphicsWidget* parent) :
     QGraphicsWidget(parent),
+    m_enabledSelectionToggles(false),
     m_grouped(false),
     m_activeTransactions(0),
     m_itemSize(),
@@ -60,6 +60,7 @@ KItemListView::KItemListView(QGraphicsWidget* parent) :
     m_model(0),
     m_visibleRoles(),
     m_visibleRolesSizes(),
+    m_stretchedVisibleRolesSizes(),
     m_widgetCreator(0),
     m_groupHeaderCreator(0),
     m_styleOption(),
@@ -117,8 +118,19 @@ void KItemListView::setScrollOrientation(Qt::Orientation orientation)
     m_layouter->setScrollOrientation(orientation);
     m_animation->setScrollOrientation(orientation);
     m_sizeHintResolver->clearCache();
-    updateLayout();
+
+    if (m_grouped) {
+        QMutableHashIterator<KItemListWidget*, KItemListGroupHeader*> it (m_visibleGroups);
+        while (it.hasNext()) {
+            it.next();
+            it.value()->setScrollOrientation(orientation);
+        }
+    }
+
+    doLayout(Animation, 0, 0);
+
     onScrollOrientationChanged(orientation, previousOrientation);
+    emit scrollOrientationChanged(orientation, previousOrientation);
 }
 
 Qt::Orientation KItemListView::scrollOrientation() const
@@ -135,18 +147,19 @@ void KItemListView::setItemSize(const QSizeF& itemSize)
 
     m_itemSize = itemSize;
 
-    if (itemSize.isEmpty()) {
-        updateVisibleRoleSizes();
-    }
-
-    if (itemSize.width() < previousSize.width() || itemSize.height() < previousSize.height()) {
-        prepareLayoutForIncreasedItemCount(itemSize, ItemSize);
+    const bool emptySize = itemSize.isEmpty();
+    if (emptySize) {
+        updateVisibleRolesSizes();
     } else {
-        m_layouter->setItemSize(itemSize);
+        if (itemSize.width() < previousSize.width() || itemSize.height() < previousSize.height()) {
+            prepareLayoutForIncreasedItemCount(itemSize, ItemSize);
+        } else {
+            m_layouter->setItemSize(itemSize);
+        }
     }
 
     m_sizeHintResolver->clearCache();
-    updateLayout();
+    doLayout(Animation, 0, 0);
     onItemSizeChanged(itemSize, previousSize);
 }
 
@@ -170,7 +183,6 @@ void KItemListView::setScrollOffset(qreal offset)
     m_animation->setScrollOffset(offset);
     if (!m_layoutTimer->isActive()) {
         doLayout(NoAnimation, 0, 0);
-        update();
     }
     onScrollOffsetChanged(offset, previousOffset);
 }
@@ -188,6 +200,12 @@ qreal KItemListView::maximumScrollOffset() const
 void KItemListView::setItemOffset(qreal offset)
 {
     m_layouter->setItemOffset(offset);
+    if (m_header) {
+        m_header->setPos(-offset, 0);
+    }
+    if (!m_layoutTimer->isActive()) {
+        doLayout(NoAnimation, 0, 0);
+    }
 }
 
 qreal KItemListView::itemOffset() const
@@ -210,21 +228,22 @@ void KItemListView::setVisibleRoles(const QList<QByteArray>& roles)
         it.next();
         KItemListWidget* widget = it.value();
         widget->setVisibleRoles(roles);
-        widget->setVisibleRolesSizes(m_visibleRolesSizes);
+        widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
     }
 
     m_sizeHintResolver->clearCache();
     m_layouter->markAsDirty();
-    onVisibleRolesChanged(roles, previousRoles);
-
-    updateVisibleRoleSizes();
-    updateLayout();
 
     if (m_header) {
         m_header->setVisibleRoles(roles);
         m_header->setVisibleRolesWidths(headerRolesWidths());
         m_useHeaderWidths = false;
     }
+
+    updateVisibleRolesSizes();
+    doLayout(Animation, 0, 0);
+
+    onVisibleRolesChanged(roles, previousRoles);
 }
 
 QList<QByteArray> KItemListView::visibleRoles() const
@@ -251,34 +270,22 @@ bool KItemListView::autoScroll() const
     return m_autoScrollTimer != 0;
 }
 
-void KItemListView::setHeaderShown(bool show)
+void KItemListView::setEnabledSelectionToggles(bool enabled)
 {
-    if (show && !m_header) {
-        m_header = new KItemListHeader(this);
-        m_header->setPos(0, 0);
-        m_header->setModel(m_model);
-        m_header->setVisibleRoles(m_visibleRoles);
-        m_header->setVisibleRolesWidths(headerRolesWidths());
-        m_header->setZValue(1);
-
-        m_useHeaderWidths = false;
-        updateHeaderWidth();
-
-        connect(m_header, SIGNAL(visibleRoleWidthChanged(QByteArray,qreal,qreal)),
-                this, SLOT(slotVisibleRoleWidthChanged(QByteArray,qreal,qreal)));
+    if (m_enabledSelectionToggles != enabled) {
+        m_enabledSelectionToggles = enabled;
 
-        m_layouter->setHeaderHeight(m_header->size().height());
-    } else if (!show && m_header) {
-        delete m_header;
-        m_header = 0;
-        m_useHeaderWidths = false;
-        m_layouter->setHeaderHeight(0);
+        QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+        while (it.hasNext()) {
+            it.next();
+            it.value()->setEnabledSelectionToggle(enabled);
+        }
     }
 }
 
-bool KItemListView::isHeaderShown() const
+bool KItemListView::enabledSelectionToggles() const
 {
-    return m_header != 0;
+    return m_enabledSelectionToggles;
 }
 
 KItemListController* KItemListView::controller() const
@@ -323,7 +330,7 @@ void KItemListView::setStyleOption(const KItemListStyleOption& option)
     }
 
     m_sizeHintResolver->clearCache();
-    updateLayout();
+    doLayout(Animation, 0, 0);
     onStyleOptionChanged(option, previousOption);
 }
 
@@ -335,6 +342,7 @@ const KItemListStyleOption& KItemListView::styleOption() const
 void KItemListView::setGeometry(const QRectF& rect)
 {
     QGraphicsWidget::setGeometry(rect);
+
     if (!m_model) {
         return;
     }
@@ -349,7 +357,10 @@ void KItemListView::setGeometry(const QRectF& rect)
         m_layoutTimer->start();
     }
 
-    updateVisibleRoleSizes();
+    // Changing the geometry does not require to do an expensive
+    // update of the visible-roles sizes, only the stretched sizes
+    // need to be adjusted to the new size.
+    updateStretchedVisibleRolesSizes();
 }
 
 int KItemListView::itemAt(const QPointF& pos) const
@@ -370,8 +381,14 @@ int KItemListView::itemAt(const QPointF& pos) const
 
 bool KItemListView::isAboveSelectionToggle(int index, const QPointF& pos) const
 {
-    Q_UNUSED(index);
-    Q_UNUSED(pos);
+    const KItemListWidget* widget = m_visibleItems.value(index);
+    if (widget) {
+        const QRectF selectionToggleRect = widget->selectionToggleRect();
+        if (!selectionToggleRect.isEmpty()) {
+            const QPointF mappedPos = widget->mapFromItem(this, pos);
+            return selectionToggleRect.contains(mappedPos);
+        }
+    }
     return false;
 }
 
@@ -410,9 +427,60 @@ QHash<QByteArray, QSizeF> KItemListView::visibleRolesSizes(const KItemRangeList&
     return QHash<QByteArray, QSizeF>();
 }
 
-QRectF KItemListView::itemBoundingRect(int index) const
+bool KItemListView::supportsItemExpanding() const
+{
+    return false;
+}
+
+QRectF KItemListView::itemRect(int index) const
 {
-    return m_layouter->itemBoundingRect(index);
+    return m_layouter->itemRect(index);
+}
+
+QRectF KItemListView::itemContextRect(int index) const
+{
+    QRectF contextRect;
+
+    const KItemListWidget* widget = m_visibleItems.value(index);
+    if (widget) {
+        contextRect = widget->iconRect() | widget->textRect();
+        contextRect.translate(itemRect(index).topLeft());
+    }
+
+    return contextRect;
+}
+
+void KItemListView::scrollToItem(int index)
+{
+    QRectF viewGeometry = geometry();
+    if (m_header) {
+        const qreal headerHeight = m_header->size().height();
+        viewGeometry.adjust(0, headerHeight, 0, 0);
+    }
+    const QRectF currentRect = itemRect(index);
+
+    if (!viewGeometry.contains(currentRect)) {
+        qreal newOffset = scrollOffset();
+        if (currentRect.top() < viewGeometry.top()) {
+            Q_ASSERT(scrollOrientation() == Qt::Vertical);
+            newOffset += currentRect.top() - viewGeometry.top();
+        } else if ((currentRect.bottom() > viewGeometry.bottom())) {
+            Q_ASSERT(scrollOrientation() == Qt::Vertical);
+            newOffset += currentRect.bottom() - viewGeometry.bottom();
+        } else if (currentRect.left() < viewGeometry.left()) {
+            if (scrollOrientation() == Qt::Horizontal) {
+                newOffset += currentRect.left() - viewGeometry.left();
+            }
+        } else if ((currentRect.right() > viewGeometry.right())) {
+            if (scrollOrientation() == Qt::Horizontal) {
+                newOffset += currentRect.right() - viewGeometry.right();
+            }
+        }
+
+        if (newOffset != scrollOffset()) {
+            emit scrollTo(newOffset);
+        }
+    }
 }
 
 int KItemListView::itemsPerOffset() const
@@ -438,7 +506,7 @@ void KItemListView::endTransaction()
 
     if (m_activeTransactions == 0) {
         onTransactionEnd();
-        updateLayout();
+        doLayout(Animation, 0, 0);
     }
 }
 
@@ -447,6 +515,41 @@ bool KItemListView::isTransactionActive() const
     return m_activeTransactions > 0;
 }
 
+
+void KItemListView::setHeaderShown(bool show)
+{
+
+    if (show && !m_header) {
+        m_header = new KItemListHeader(this);
+        m_header->setPos(0, 0);
+        m_header->setModel(m_model);
+        m_header->setVisibleRoles(m_visibleRoles);
+        m_header->setVisibleRolesWidths(headerRolesWidths());
+        m_header->setZValue(1);
+
+        connect(m_header, SIGNAL(visibleRoleWidthChanged(QByteArray,qreal,qreal)),
+                this, SLOT(slotVisibleRoleWidthChanged(QByteArray,qreal,qreal)));
+        connect(m_header, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+                this, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+        connect(m_header, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+                this, SIGNAL(sortRoleChanged(QByteArray,QByteArray)));
+
+        m_useHeaderWidths = false;
+
+        m_layouter->setHeaderHeight(m_header->size().height());
+    } else if (!show && m_header) {
+        delete m_header;
+        m_header = 0;
+        m_useHeaderWidths = false;
+        m_layouter->setHeaderHeight(0);
+    }
+}
+
+bool KItemListView::isHeaderShown() const
+{
+    return m_header != 0;
+}
+
 QPixmap KItemListView::createDragPixmap(const QSet<int>& indexes) const
 {
     Q_UNUSED(indexes);
@@ -600,12 +703,34 @@ QList<KItemListWidget*> KItemListView::visibleItemListWidgets() const
 void KItemListView::resizeEvent(QGraphicsSceneResizeEvent* event)
 {
     QGraphicsWidget::resizeEvent(event);
-    updateHeaderWidth();
+    if (m_itemSize.isEmpty() && m_useHeaderWidths) {
+        QSizeF dynamicItemSize = m_layouter->itemSize();
+        const QSizeF newSize = event->newSize();
+
+        if (m_itemSize.width() < 0) {
+            const qreal requiredWidth = visibleRolesSizesWidthSum();
+            if (newSize.width() > requiredWidth) {
+                dynamicItemSize.setWidth(newSize.width());
+            }
+            const qreal headerWidth = qMax(newSize.width(), requiredWidth);
+            m_header->resize(headerWidth, m_header->size().height());
+        }
+
+        if (m_itemSize.height() < 0) {
+            const qreal requiredHeight = visibleRolesSizesHeightSum();
+            if (newSize.height() > requiredHeight) {
+                dynamicItemSize.setHeight(newSize.height());
+            }
+            // TODO: KItemListHeader is not prepared for vertical alignment
+        }
+
+        m_layouter->setItemSize(dynamicItemSize);
+    }
 }
 
 void KItemListView::slotItemsInserted(const KItemRangeList& itemRanges)
 {
-    updateVisibleRoleSizes(itemRanges);
+    updateVisibleRolesSizes(itemRanges);
 
     const bool hasMultipleRanges = (itemRanges.count() > 1);
     if (hasMultipleRanges) {
@@ -663,7 +788,6 @@ void KItemListView::slotItemsInserted(const KItemRangeList& itemRanges)
 
         if (!hasMultipleRanges) {
             doLayout(Animation, index, count);
-            update();
         }
     }
 
@@ -678,7 +802,7 @@ void KItemListView::slotItemsInserted(const KItemRangeList& itemRanges)
 
 void KItemListView::slotItemsRemoved(const KItemRangeList& itemRanges)
 {
-    updateVisibleRoleSizes();
+    updateVisibleRolesSizes();
 
     const bool hasMultipleRanges = (itemRanges.count() > 1);
     if (hasMultipleRanges) {
@@ -744,7 +868,6 @@ void KItemListView::slotItemsRemoved(const KItemRangeList& itemRanges)
         m_layouter->markAsDirty();
         if (!hasMultipleRanges) {
             doLayout(Animation, index, -count);
-            update();
         }
     }
 
@@ -757,12 +880,38 @@ void KItemListView::slotItemsRemoved(const KItemRangeList& itemRanges)
     }
 }
 
+void KItemListView::slotItemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes)
+{
+    m_sizeHintResolver->itemsMoved(itemRange.index, itemRange.count);
+    m_layouter->markAsDirty();
+
+    if (m_controller) {
+        m_controller->selectionManager()->itemsMoved(itemRange, movedToIndexes);
+    }
+
+    const int firstVisibleMovedIndex = qMax(firstVisibleIndex(), itemRange.index);
+    const int lastVisibleMovedIndex = qMin(lastVisibleIndex(), itemRange.index + itemRange.count - 1);
+
+    for (int index = firstVisibleMovedIndex; index <= lastVisibleMovedIndex; ++index) {
+        KItemListWidget* widget = m_visibleItems.value(index);
+        if (widget) {
+            updateWidgetProperties(widget, index);
+            if (m_grouped) {
+                updateGroupHeaderForWidget(widget);
+            }
+            initializeItemListWidget(widget);
+        }
+    }
+
+    doLayout(NoAnimation, 0, 0);
+}
+
 void KItemListView::slotItemsChanged(const KItemRangeList& itemRanges,
                                      const QSet<QByteArray>& roles)
 {
     const bool updateSizeHints = itemSizeHintUpdateRequired(roles);
     if (updateSizeHints) {
-        updateVisibleRoleSizes(itemRanges);
+        updateVisibleRolesSizes(itemRanges);
     }
 
     foreach (const KItemRange& itemRange, itemRanges) {
@@ -772,6 +921,7 @@ void KItemListView::slotItemsChanged(const KItemRangeList& itemRanges,
         if (updateSizeHints) {
             m_sizeHintResolver->itemsChanged(index, count, roles);
             m_layouter->markAsDirty();
+
             if (!m_layoutTimer->isActive()) {
                 m_layoutTimer->start();
             }
@@ -786,6 +936,57 @@ void KItemListView::slotItemsChanged(const KItemRangeList& itemRanges,
             }
         }
 
+        if (m_grouped && roles.contains(m_model->sortRole())) {
+            // The sort-role has been changed which might result
+            // in modified group headers
+            updateVisibleGroupHeaders();
+            doLayout(NoAnimation, 0, 0);
+        }
+    }
+}
+
+void KItemListView::slotGroupedSortingChanged(bool current)
+{
+    m_grouped = current;
+    m_layouter->markAsDirty();
+
+    if (m_grouped) {
+        // Apply the height of the header to the layouter
+        const qreal groupHeaderHeight = m_styleOption.fontMetrics.height() +
+                                        m_styleOption.margin * 2;
+        m_layouter->setGroupHeaderHeight(groupHeaderHeight);
+
+        updateVisibleGroupHeaders();
+    } else {
+        // Clear all visible headers
+        QMutableHashIterator<KItemListWidget*, KItemListGroupHeader*> it (m_visibleGroups);
+        while (it.hasNext()) {
+            it.next();
+            recycleGroupHeaderForWidget(it.key());
+        }
+        Q_ASSERT(m_visibleGroups.isEmpty());
+    }
+
+    doLayout(Animation, 0, 0);
+}
+
+void KItemListView::slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
+    if (m_grouped) {
+        updateVisibleGroupHeaders();
+        doLayout(Animation, 0, 0);
+    }
+}
+
+void KItemListView::slotSortRoleChanged(const QByteArray& current, const QByteArray& previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
+    if (m_grouped) {
+        updateVisibleGroupHeaders();
+        doLayout(Animation, 0, 0);
     }
 }
 
@@ -804,33 +1005,6 @@ void KItemListView::slotCurrentChanged(int current, int previous)
         Q_ASSERT(!currentWidget->isCurrent());
         currentWidget->setCurrent(true);
     }
-
-    const QRectF viewGeometry = geometry();
-    const QRectF currentBoundingRect = itemBoundingRect(current);
-
-    if (!viewGeometry.contains(currentBoundingRect)) {
-        // Make sure that the new current item is fully visible in the view.
-        qreal newOffset = scrollOffset();
-        if (currentBoundingRect.top() < viewGeometry.top()) {
-            Q_ASSERT(scrollOrientation() == Qt::Vertical);
-            newOffset += currentBoundingRect.top() - viewGeometry.top();
-        } else if ((currentBoundingRect.bottom() > viewGeometry.bottom())) {
-            Q_ASSERT(scrollOrientation() == Qt::Vertical);
-            newOffset += currentBoundingRect.bottom() - viewGeometry.bottom();
-        } else if (currentBoundingRect.left() < viewGeometry.left()) {
-            if (scrollOrientation() == Qt::Horizontal) {
-                newOffset += currentBoundingRect.left() - viewGeometry.left();
-            }
-        } else if ((currentBoundingRect.right() > viewGeometry.right())) {
-            if (scrollOrientation() == Qt::Horizontal) {
-                newOffset += currentBoundingRect.right() - viewGeometry.right();
-            }
-        }
-
-        if (newOffset != scrollOffset()) {
-            emit scrollTo(newOffset);
-        }
-    }
 }
 
 void KItemListView::slotSelectionChanged(const QSet<int>& current, const QSet<int>& previous)
@@ -862,11 +1036,7 @@ void KItemListView::slotAnimationFinished(QGraphicsWidget* widget,
         // All KItemListWidgets that are animated by the DeleteAnimation are not maintained
         // by m_visibleWidgets and must be deleted manually after the animation has
         // been finished.
-        KItemListGroupHeader* header = m_visibleGroups.value(itemListWidget);
-        if (header) {
-            m_groupHeaderCreator->recycle(header);
-            m_visibleGroups.remove(itemListWidget);
-        }
+        recycleGroupHeaderForWidget(itemListWidget);
         m_widgetCreator->recycle(itemListWidget);
         break;
     }
@@ -925,9 +1095,27 @@ void KItemListView::slotVisibleRoleWidthChanged(const QByteArray& role,
         QSizeF roleSize = m_visibleRolesSizes.value(role);
         roleSize.setWidth(currentWidth);
         m_visibleRolesSizes.insert(role, roleSize);
+        m_stretchedVisibleRolesSizes.insert(role, roleSize);
 
-        updateVisibleRoleSizes();
-        updateLayout();
+        // Apply the new size to the layouter
+        QSizeF dynamicItemSize = m_itemSize;
+        if (dynamicItemSize.width() < 0) {
+            const qreal requiredWidth = visibleRolesSizesWidthSum();
+            dynamicItemSize.setWidth(qMax(size().width(), requiredWidth));
+        }
+        if (dynamicItemSize.height() < 0) {
+            const qreal requiredHeight = visibleRolesSizesHeightSum();
+            dynamicItemSize.setHeight(qMax(size().height(), requiredHeight));
+        }
+
+        m_layouter->setItemSize(dynamicItemSize);
+
+        // Update the role sizes for all visible widgets
+        foreach (KItemListWidget* widget, visibleItemListWidgets()) {
+            widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
+        }
+
+        doLayout(Animation, 0, 0);
     }
 }
 
@@ -1025,11 +1213,19 @@ void KItemListView::setModel(KItemModelBase* model)
                    this,    SLOT(slotItemsInserted(KItemRangeList)));
         disconnect(m_model, SIGNAL(itemsRemoved(KItemRangeList)),
                    this,    SLOT(slotItemsRemoved(KItemRangeList)));
+        disconnect(m_model, SIGNAL(itemsMoved(KItemRange,QList<int>)),
+                   this,    SLOT(slotItemsMoved(KItemRange,QList<int>)));
+        disconnect(m_model, SIGNAL(groupedSortingChanged(bool)),
+                   this,    SLOT(slotGroupedSortingChanged(bool)));
+        disconnect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+                   this,    SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+        disconnect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+                   this,    SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
     }
 
     m_model = model;
-    m_layouter->setModel(model);
-    m_grouped = !model->groupRole().isEmpty();
+    m_layouter->setModel(model);   
+    m_grouped = model->groupedSorting();
 
     if (m_model) {
         connect(m_model, SIGNAL(itemsChanged(KItemRangeList,QSet<QByteArray>)),
@@ -1038,6 +1234,14 @@ void KItemListView::setModel(KItemModelBase* model)
                 this,    SLOT(slotItemsInserted(KItemRangeList)));
         connect(m_model, SIGNAL(itemsRemoved(KItemRangeList)),
                 this,    SLOT(slotItemsRemoved(KItemRangeList)));
+        connect(m_model, SIGNAL(itemsMoved(KItemRange,QList<int>)),
+                this,    SLOT(slotItemsMoved(KItemRange,QList<int>)));
+        connect(m_model, SIGNAL(groupedSortingChanged(bool)),
+                this,    SLOT(slotGroupedSortingChanged(bool)));
+        connect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+                this,    SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+        connect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+                this,    SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
     }
 
     onModelChanged(model, previous);
@@ -1048,12 +1252,6 @@ KItemListRubberBand* KItemListView::rubberBand() const
     return m_rubberBand;
 }
 
-void KItemListView::updateLayout()
-{
-    doLayout(Animation, 0, 0);
-    update();
-}
-
 void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int changedCount)
 {
     if (m_layoutTimer->isActive()) {
@@ -1061,12 +1259,10 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
         m_layoutTimer->stop();
     }
 
-    if (m_model->count() < 0 || m_activeTransactions > 0) {
+    if (!m_model || m_model->count() < 0 || m_activeTransactions > 0) {
         return;
     }
 
-    //markVisibleRolesSizesAsDirty();
-
     const int firstVisibleIndex = m_layouter->firstVisibleIndex();
     const int lastVisibleIndex = m_layouter->lastVisibleIndex();
     if (firstVisibleIndex < 0) {
@@ -1098,6 +1294,10 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
         if (invisible && !m_animation->isStarted(widget)) {
             widget->setVisible(false);
             reusableItems.append(index);
+
+            if (m_grouped) {
+                recycleGroupHeaderForWidget(widget);
+            }
         }
     }
 
@@ -1109,7 +1309,7 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
         bool applyNewPos = true;
         bool wasHidden = false;
 
-        const QRectF itemBounds = m_layouter->itemBoundingRect(i);
+        const QRectF itemBounds = m_layouter->itemRect(i);
         const QPointF newPos = itemBounds.topLeft();
         KItemListWidget* widget = m_visibleItems.value(i);
         if (!widget) {
@@ -1119,6 +1319,10 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
                 const int oldIndex = reusableItems.takeLast();
                 widget = m_visibleItems.value(oldIndex);
                 setWidgetIndex(widget, i);
+
+                if (m_grouped) {
+                    updateGroupHeaderForWidget(widget);
+                }
             } else {
                 // No reusable KItemListWidget instance is available, create a new one
                 widget = createWidget(i);
@@ -1128,13 +1332,13 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
             if (animate && changedCount < 0) {
                 // Items have been deleted, move the created item to the
                 // imaginary old position.
-                const QRectF itemBoundingRect = m_layouter->itemBoundingRect(i - changedCount);
-                if (itemBoundingRect.isEmpty()) {
+                const QRectF itemRect = m_layouter->itemRect(i - changedCount);
+                if (itemRect.isEmpty()) {
                     const QPointF invisibleOldPos = (scrollOrientation() == Qt::Vertical)
                                                     ? QPointF(0, size().height()) : QPointF(size().width(), 0);
                     widget->setPos(invisibleOldPos);
                 } else {
-                    widget->setPos(itemBoundingRect.topLeft());
+                    widget->setPos(itemRect.topLeft());
                 }
                 applyNewPos = false;
             }
@@ -1181,7 +1385,11 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
         widget->setVisible(true);
 
         if (widget->size() != itemBounds.size()) {
-            m_animation->start(widget, KItemListViewAnimation::ResizeAnimation, itemBounds.size());
+            if (animate) {
+                m_animation->start(widget, KItemListViewAnimation::ResizeAnimation, itemBounds.size());
+            } else {
+                widget->resize(itemBounds.size());
+            }
         }
     }
 
@@ -1190,6 +1398,15 @@ void KItemListView::doLayout(LayoutAnimationHint hint, int changedIndex, int cha
         recycleWidget(m_visibleItems.value(index));
     }
 
+    if (m_grouped) {
+        // Update the layout of all visible group headers
+        QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_visibleGroups);
+        while (it.hasNext()) {
+            it.next();
+            updateGroupHeaderLayout(it.key());
+        }
+    }
+
     emitOffsetChanges();
 }
 
@@ -1223,16 +1440,13 @@ void KItemListView::emitOffsetChanges()
 KItemListWidget* KItemListView::createWidget(int index)
 {
     KItemListWidget* widget = m_widgetCreator->create(this);
+    widget->setFlag(QGraphicsItem::ItemStacksBehindParent);
+
     updateWidgetProperties(widget, index);
     m_visibleItems.insert(index, widget);
 
     if (m_grouped) {
-        if (m_layouter->isFirstGroupItem(index)) {
-            KItemListGroupHeader* header = m_groupHeaderCreator->create(widget);
-            header->setPos(0, -50);
-            header->resize(50, 50);
-            m_visibleGroups.insert(widget, header);
-        }
+        updateGroupHeaderForWidget(widget);
     }
 
     initializeItemListWidget(widget);
@@ -1242,11 +1456,7 @@ KItemListWidget* KItemListView::createWidget(int index)
 void KItemListView::recycleWidget(KItemListWidget* widget)
 {
     if (m_grouped) {
-        KItemListGroupHeader* header = m_visibleGroups.value(widget);
-        if (header) {
-            m_groupHeaderCreator->recycle(header);
-            m_visibleGroups.remove(widget);
-        }
+        recycleGroupHeaderForWidget(widget);
     }
 
     m_visibleItems.remove(widget->index());
@@ -1255,26 +1465,6 @@ void KItemListView::recycleWidget(KItemListWidget* widget)
 
 void KItemListView::setWidgetIndex(KItemListWidget* widget, int index)
 {
-    if (m_grouped) {
-        bool createHeader = m_layouter->isFirstGroupItem(index);
-        KItemListGroupHeader* header = m_visibleGroups.value(widget);
-        if (header) {
-            if (createHeader) {
-                createHeader = false;
-            } else {
-                m_groupHeaderCreator->recycle(header);
-                m_visibleGroups.remove(widget);
-            }
-        }
-
-        if (createHeader) {
-            KItemListGroupHeader* header = m_groupHeaderCreator->create(widget);
-            header->setPos(0, -50);
-            header->resize(50, 50);
-            m_visibleGroups.insert(widget, header);
-        }
-    }
-
     const int oldIndex = widget->index();
     m_visibleItems.remove(oldIndex);
     updateWidgetProperties(widget, index);
@@ -1320,8 +1510,9 @@ void KItemListView::prepareLayoutForIncreasedItemCount(const QSizeF& size, SizeT
         for (int i = minFirst; i <= maxLast; ++i) {
             if (!m_visibleItems.contains(i)) {
                 KItemListWidget* widget = createWidget(i);
-                const QPointF pos = m_layouter->itemBoundingRect(i).topLeft();
-                widget->setPos(pos);
+                const QRectF itemRect = m_layouter->itemRect(i);
+                widget->setPos(itemRect.topLeft());
+                widget->resize(itemRect.size());
             }
         }
         setLayouterSize(size, sizeType);
@@ -1340,40 +1531,110 @@ void KItemListView::setLayouterSize(const QSizeF& size, SizeType sizeType)
 void KItemListView::updateWidgetProperties(KItemListWidget* widget, int index)
 {
     widget->setVisibleRoles(m_visibleRoles);
-    widget->setVisibleRolesSizes(m_visibleRolesSizes);
+    widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
     widget->setStyleOption(m_styleOption);
 
     const KItemListSelectionManager* selectionManager = m_controller->selectionManager();
     widget->setCurrent(index == selectionManager->currentItem());
-
-    if (selectionManager->hasSelection()) {
-        const QSet<int> selectedItems = selectionManager->selectedItems();
-        widget->setSelected(selectedItems.contains(index));
-    } else {
-        widget->setSelected(false);
-    }
-
+    widget->setSelected(selectionManager->isSelected(index));
     widget->setHovered(false);
-
+    widget->setAlternatingBackgroundColors(false);
+    widget->setEnabledSelectionToggle(enabledSelectionToggles());
     widget->setIndex(index);
     widget->setData(m_model->data(index));
 }
 
-void KItemListView::updateHeaderWidth()
+void KItemListView::updateGroupHeaderForWidget(KItemListWidget* widget)
 {
-    if (!m_header) {
+    Q_ASSERT(m_grouped);
+
+    const int index = widget->index();
+    if (!m_layouter->isFirstGroupItem(index)) {
+        // The widget does not represent the first item of a group
+        // and hence requires no header
+        recycleGroupHeaderForWidget(widget);
+        return;
+    }
+
+    const QList<QPair<int, QVariant> > groups = model()->groups();
+    if (groups.isEmpty()) {
         return;
     }
 
-    // TODO 1: Use the required width of all roles
-    m_header->resize(size().width(), m_header->size().height());
+    KItemListGroupHeader* header = m_visibleGroups.value(widget);
+    if (!header) {
+        header = m_groupHeaderCreator->create(this);
+        header->setParentItem(widget);
+        m_visibleGroups.insert(widget, header);
+    }
+    Q_ASSERT(header->parentItem() == widget);
+
+    // Determine the shown data for the header by doing a binary
+    // search in the groups-list
+    int min = 0;
+    int max = groups.count() - 1;
+    int mid = 0;
+    do {
+        mid = (min + max) / 2;
+        if (index > groups.at(mid).first) {
+            min = mid + 1;
+        } else {
+            max = mid - 1;
+        }
+    } while (groups.at(mid).first != index && min <= max);
+
+    header->setData(groups.at(mid).second);
+    header->setRole(model()->sortRole());
+    header->setStyleOption(m_styleOption);
+    header->setScrollOrientation(scrollOrientation());
+
+    header->show();
+}
+
+void KItemListView::updateGroupHeaderLayout(KItemListWidget* widget)
+{
+    KItemListGroupHeader* header = m_visibleGroups.value(widget);
+    Q_ASSERT(header);
+
+    const int index = widget->index();
+    const QRectF groupHeaderRect = m_layouter->groupHeaderRect(index);
+    const QRectF itemRect = m_layouter->itemRect(index);
+
+    // The group-header is a child of the itemlist widget. Translate the
+    // group header position to the relative position.
+    const QPointF groupHeaderPos(groupHeaderRect.x() - itemRect.x(),
+                                 - groupHeaderRect.height());
+    header->setPos(groupHeaderPos);
+    header->resize(groupHeaderRect.size());
+}
+
+void KItemListView::recycleGroupHeaderForWidget(KItemListWidget* widget)
+{
+    KItemListGroupHeader* header = m_visibleGroups.value(widget);
+    if (header) {
+        header->setParentItem(0);
+        m_groupHeaderCreator->recycle(header);
+        m_visibleGroups.remove(widget);
+    }
+}
+
+void KItemListView::updateVisibleGroupHeaders()
+{
+    Q_ASSERT(m_grouped);
+    m_layouter->markAsDirty();
+
+    QHashIterator<int, KItemListWidget*> it(m_visibleItems);
+    while (it.hasNext()) {
+        it.next();
+        updateGroupHeaderForWidget(it.value());
+    }
 }
 
 QHash<QByteArray, qreal> KItemListView::headerRolesWidths() const
 {
     QHash<QByteArray, qreal> rolesWidths;
 
-    QHashIterator<QByteArray, QSizeF> it(m_visibleRolesSizes);
+    QHashIterator<QByteArray, QSizeF> it(m_stretchedVisibleRolesSizes);
     while (it.hasNext()) {
         it.next();
         rolesWidths.insert(it.key(), it.value().width());
@@ -1382,7 +1643,7 @@ QHash<QByteArray, qreal> KItemListView::headerRolesWidths() const
     return rolesWidths;
 }
 
-void KItemListView::updateVisibleRoleSizes(const KItemRangeList& itemRanges)
+void KItemListView::updateVisibleRolesSizes(const KItemRangeList& itemRanges)
 {
     if (!m_itemSize.isEmpty() || m_useHeaderWidths) {
         return;
@@ -1395,8 +1656,21 @@ void KItemListView::updateVisibleRoleSizes(const KItemRangeList& itemRanges)
     }
 
     if (itemCount == rangesItemCount) {
-        // The sizes of all roles need to be determined
         m_visibleRolesSizes = visibleRolesSizes(itemRanges);
+        if (m_header) {
+            // Assure the the sizes are not smaller than the minimum defined by the header
+            // TODO: Currently only implemented for a top-aligned header
+            const qreal minHeaderRoleWidth = m_header->minimumRoleWidth();
+            QMutableHashIterator<QByteArray, QSizeF> it (m_visibleRolesSizes);
+            while (it.hasNext()) {
+                it.next();
+                const QSizeF& size = it.value();
+                if (size.width() < minHeaderRoleWidth) {
+                    const QSizeF newSize(minHeaderRoleWidth, size.height());
+                    m_visibleRolesSizes.insert(it.key(), newSize);
+                }
+            }
+        }
     } else {
         // Only a sub range of the roles need to be determined.
         // The chances are good that the sizes of the sub ranges
@@ -1419,47 +1693,102 @@ void KItemListView::updateVisibleRoleSizes(const KItemRangeList& itemRanges)
 
         if (!updateRequired) {
             // All the updated sizes are smaller than the current sizes and no change
-            // of the roles-widths is required
+            // of the stretched roles-widths is required
             return;
         }
     }
 
-    if (m_header) {
-        m_header->setVisibleRolesWidths(headerRolesWidths());
+    updateStretchedVisibleRolesSizes();
+}
+
+void KItemListView::updateVisibleRolesSizes()
+{
+    if (!m_model) {
+        return;
     }
 
-    // Calculate the maximum size of an item by considering the
-    // visible role sizes and apply them to the layouter.
-    qreal requiredWidth = 0;
-    qreal requiredHeight = 0;
+    const int itemCount = m_model->count();
+    if (itemCount > 0) {
+        updateVisibleRolesSizes(KItemRangeList() << KItemRange(0, itemCount));
+    }
+}
 
-    QHashIterator<QByteArray, QSizeF> it(m_visibleRolesSizes);
-    while (it.hasNext()) {
-        it.next();
-        const QSizeF& visibleRoleSize = it.value();
-        requiredWidth  += visibleRoleSize.width();
-        requiredHeight += visibleRoleSize.height();
+void KItemListView::updateStretchedVisibleRolesSizes()
+{
+    if (!m_itemSize.isEmpty() || m_useHeaderWidths || m_visibleRoles.isEmpty()) {
+        return;
     }
 
+    // Calculate the maximum size of an item by considering the
+    // visible role sizes and apply them to the layouter. If the
+    // size does not use the available view-size it the size of the
+    // first role will get stretched.
+    m_stretchedVisibleRolesSizes = m_visibleRolesSizes;
+    const QByteArray role = m_visibleRoles.first();
+    QSizeF firstRoleSize = m_stretchedVisibleRolesSizes.value(role);
+
     QSizeF dynamicItemSize = m_itemSize;
+
     if (dynamicItemSize.width() <= 0) {
-        dynamicItemSize.setWidth(qMax(requiredWidth, size().width()));
+        const qreal requiredWidth = visibleRolesSizesWidthSum();
+        const qreal availableWidth = size().width();
+        if (requiredWidth < availableWidth) {
+            // Stretch the first role to use the whole width for the item
+            firstRoleSize.rwidth() += availableWidth - requiredWidth;
+            m_stretchedVisibleRolesSizes.insert(role, firstRoleSize);
+        }
+        dynamicItemSize.setWidth(qMax(requiredWidth, availableWidth));
     }
+
     if (dynamicItemSize.height() <= 0) {
-        dynamicItemSize.setHeight(qMax(requiredHeight, size().height()));
+        const qreal requiredHeight = visibleRolesSizesHeightSum();
+        const qreal availableHeight = size().height();
+        if (requiredHeight < availableHeight) {
+            // Stretch the first role to use the whole height for the item
+            firstRoleSize.rheight() += availableHeight - requiredHeight;
+            m_stretchedVisibleRolesSizes.insert(role, firstRoleSize);
+        }
+        dynamicItemSize.setHeight(qMax(requiredHeight, availableHeight));
     }
 
     m_layouter->setItemSize(dynamicItemSize);
 
+    if (m_header) {
+        m_header->setVisibleRolesWidths(headerRolesWidths());
+        m_header->resize(dynamicItemSize.width(), m_header->size().height());
+    }
+
     // Update the role sizes for all visible widgets
     foreach (KItemListWidget* widget, visibleItemListWidgets()) {
-        widget->setVisibleRolesSizes(m_visibleRolesSizes);
+        widget->setVisibleRolesSizes(m_stretchedVisibleRolesSizes);
+    }
+}
+
+qreal KItemListView::visibleRolesSizesWidthSum() const
+{
+    qreal widthSum = 0;
+    QHashIterator<QByteArray, QSizeF> it(m_visibleRolesSizes);
+    while (it.hasNext()) {
+        it.next();
+        widthSum += it.value().width();
+    }
+    return widthSum;
+}
+
+qreal KItemListView::visibleRolesSizesHeightSum() const
+{
+    qreal heightSum = 0;
+    QHashIterator<QByteArray, QSizeF> it(m_visibleRolesSizes);
+    while (it.hasNext()) {
+        it.next();
+        heightSum += it.value().height();
     }
+    return heightSum;
 }
 
-void KItemListView::updateVisibleRoleSizes()
+QRectF KItemListView::headerBoundaries() const
 {
-    updateVisibleRoleSizes(KItemRangeList() << KItemRange(0, m_model->count()));
+    return m_header ? m_header->geometry() : QRectF();
 }
 
 int KItemListView::calculateAutoScrollingIncrement(int pos, int range, int oldInc)
@@ -1531,6 +1860,7 @@ KItemListWidgetCreatorBase::~KItemListWidgetCreatorBase()
 
 void KItemListWidgetCreatorBase::recycle(KItemListWidget* widget)
 {
+    widget->setParentItem(0);
     widget->setOpacity(1.0);
     pushRecycleableWidget(widget);
 }