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when changing the view mode if the preview is turned on, the directory must get reloa...
[dolphin.git] / src / dolphindetailsview.cpp
index 8aff93bfa4804641f39f9fe2b213bd02b999b75a..5c77ff7107e1057974a5115805b270bc8ef82f06 100644 (file)
 
 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
     QTreeView(parent),
-       m_autoResize(true),
+    m_autoResize(true),
     m_expandingTogglePressed(false),
     m_keyPressed(false),
     m_useDefaultIndexAt(true),
+    m_ignoreScrollTo(false),
     m_controller(controller),
     m_selectionManager(0),
     m_font(),
     m_decorationSize(),
-    m_band(),
-    m_ignoreScrollTo(false)
+    m_band()
 {
     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
     Q_ASSERT(settings != 0);
@@ -245,6 +245,7 @@ void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
             m_band.origin = event->pos() + pos + scrollPos;
             m_band.destination = m_band.origin;
+            m_band.originalSelection = selectionModel()->selection();
         }
     } 
 }
@@ -306,13 +307,13 @@ void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 
 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 {
-    DragAndDropHelper::startDrag(this, supportedActions, m_controller);
+    DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
     m_band.show = false;
 }
 
 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 {
-    if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
+    if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
         event->acceptProposedAction();
     }
 
@@ -345,7 +346,7 @@ void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
         setDirtyRegion(m_dropRect);
     }
 
-    if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
+    if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
         // accept url drops, independently from the destination item
         event->acceptProposedAction();
     }
@@ -513,6 +514,13 @@ void DolphinDetailsView::updateElasticBand()
         QRect dirtyRegion(elasticBandRect());        
         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
+        // Going above the (logical) top-left of the view causes complications during selection;
+        // we may as well prevent it.
+        if (m_band.destination.y() < 0)
+            m_band.destination.setY(0);
+        if (m_band.destination.x() < 0)
+            m_band.destination.setX(0);
+            
         dirtyRegion = dirtyRegion.united(elasticBandRect());
         setDirtyRegion(dirtyRegion);
     }
@@ -605,7 +613,10 @@ void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize,
     Q_UNUSED(logicalIndex);
     Q_UNUSED(oldSize);
     Q_UNUSED(newSize);
-    if (QApplication::mouseButtons() & Qt::LeftButton) {
+    // If the user changes the size of the headers, the autoresize feature should be
+    // turned off. As there is no dedicated interface to find out whether the header
+    // section has been resized by the user or by a resize event, the following approach is used:
+    if ((QApplication::mouseButtons() & Qt::LeftButton) && isVisible()) {
         disableAutoResizing();
     }
 }
@@ -651,11 +662,14 @@ void DolphinDetailsView::updateElasticBandSelection()
     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
     QRect selRect = elasticBandRect().normalized();
-    QRect nameColumnRect(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
-    selRect = nameColumnRect.intersect(selRect).normalized();
+    QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
+    selRect = nameColumnArea.intersect(selRect).normalized();
+    // Get the last elastic band rectangle, expressed in viewpoint coordinates.
+    const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
+    QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized();
 
     if (selRect.isNull()) {
-        clearSelection();
+        selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
         m_band.ignoreOldInfo = true;
         return;
     }
@@ -669,17 +683,16 @@ void DolphinDetailsView::updateElasticBandSelection()
             // No items in the model presumably.
             return;
         }
-        
+
         // If the elastic band does not cover the same rows as before, we'll
         // need to re-check, and also invalidate the old item distances.
         const int rowHeight = QTreeView::rowHeight(dummyIndex);
         const bool coveringSameRows =
-            (selRect.top()    / rowHeight == m_band.oldSelectionRect.top()    / rowHeight) &&
-            (selRect.bottom() / rowHeight == m_band.oldSelectionRect.bottom() / rowHeight);
+            (selRect.top()    / rowHeight == oldSelRect.top()    / rowHeight) &&
+            (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight);
         if (coveringSameRows) {
             // Covering the same rows, but have we moved far enough horizontally 
             // that we might have (de)selected some other items?
-            const QRect oldSelRect = m_band.oldSelectionRect;
             const bool itemSelectionChanged =
                 ((selRect.left() > oldSelRect.left()) &&
                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
@@ -695,6 +708,13 @@ void DolphinDetailsView::updateElasticBandSelection()
             }
         }
     }
+    else {
+        // This is the only piece of optimization data that needs to be explicitly
+        // discarded.
+        m_band.lastSelectionOrigin = QPoint();
+        m_band.lastSelectionDestination = QPoint();
+        oldSelRect = selRect;
+    }
 
     // Do the selection from scratch. Force a update of the horizontal distances info.
     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
@@ -704,7 +724,7 @@ void DolphinDetailsView::updateElasticBandSelection()
 
     // Include the old selection rect as well, so we can deselect
     // items that were inside it but not in the new selRect.
-    const QRect boundingRect = selRect.united(m_band.oldSelectionRect).normalized();
+    const QRect boundingRect = selRect.united(oldSelRect).normalized();
     if (boundingRect.isNull()) {
         return;
     }
@@ -718,7 +738,7 @@ void DolphinDetailsView::updateElasticBandSelection()
         startIndex = model()->index(startIndex.row(), KDirModel::Name);
     }
     if (!startIndex.isValid()) {
-        clearSelection();
+        selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
         m_band.ignoreOldInfo = true;
         return;
     }
@@ -729,7 +749,7 @@ void DolphinDetailsView::updateElasticBandSelection()
    QModelIndex currIndex = startIndex;
    QModelIndex lastIndex;
    bool allItemsInBoundDone = false;
-   
+
    // Calling selectionModel()->select(...) for each item that needs to be 
    // toggled is slow as each call emits selectionChanged(...) so store them
    // and do the selection toggle in one batch.
@@ -740,11 +760,9 @@ void DolphinDetailsView::updateElasticBandSelection()
    QModelIndex toggleIndexRangeBegin = QModelIndex();
 
    do {
-       QRect currIndexRect = visualRect(currIndex);
-       const QString name = m_controller->itemForIndex(currIndex).name();
-       currIndexRect.setWidth(DolphinFileItemDelegate::nameColumnWidth(name, viewOptions()));
+       QRect currIndexRect = nameColumnRect(currIndex);
 
-        // Update some optimisation info as we go.
+        // Update some optimization info as we go.
        const int cr = currIndexRect.right();
        const int cl = currIndexRect.left();
        const int sl = selRect.left();
@@ -764,8 +782,10 @@ void DolphinDetailsView::updateElasticBandSelection()
        }
 
        bool currentlySelected = selectionModel()->isSelected(currIndex);
+       bool originallySelected = m_band.originalSelection.contains(currIndex);
        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
-       bool needToToggleItem = (currentlySelected && !intersectsSelectedRect) || (!currentlySelected && intersectsSelectedRect);
+       bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected);
+       bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected);
        if (needToToggleItem && !formingToggleIndexRange) {
             toggleIndexRangeBegin = currIndex;
             formingToggleIndexRange = true;
@@ -780,12 +800,21 @@ void DolphinDetailsView::updateElasticBandSelection()
                                             allItemsInBoundDone ||
                                             currIndex.parent() != toggleIndexRangeBegin.parent());
        if (commitToggleIndexRange) {
-           itemsToToggle.select(toggleIndexRangeBegin, lastIndex );
-           // Immediately start a new range with currIndex?
+           formingToggleIndexRange = false;
+            // If this is the last item in the bounds and it is also the beginning of a range,
+            // don't toggle lastIndex - it will already have been dealt with.
+           if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) { 
+               itemsToToggle.select(toggleIndexRangeBegin, lastIndex);
+           }
+            // Need to start a new range immediately with currIndex?
            if (needToToggleItem) {
                toggleIndexRangeBegin = currIndex;
+               formingToggleIndexRange = true;
+           }
+           if (allItemsInBoundDone && needToToggleItem) {
+                // Toggle the very last item in the bounds.
+               itemsToToggle.select(currIndex, currIndex);
            }
-           formingToggleIndexRange = needToToggleItem;
        }
 
        // next item
@@ -795,7 +824,8 @@ void DolphinDetailsView::updateElasticBandSelection()
 
     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 
-    m_band.oldSelectionRect = selRect;
+    m_band.lastSelectionOrigin = m_band.origin;
+    m_band.lastSelectionDestination = m_band.destination;
     m_band.ignoreOldInfo = false;
 }
 
@@ -889,7 +919,7 @@ QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
     QRect rect = visualRect(index);
     const KFileItem item = m_controller->itemForIndex(index);
     if (!item.isNull()) {
-        const int width = DolphinFileItemDelegate::nameColumnWidth(item.name(), viewOptions());
+        const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
         rect.setWidth(width);
     }
 
@@ -900,7 +930,8 @@ DolphinDetailsView::ElasticBand::ElasticBand() :
     show(false),
     origin(),
     destination(),
-    oldSelectionRect(),
+    lastSelectionOrigin(),
+    lastSelectionDestination(),
     ignoreOldInfo(true),
     outsideNearestLeftEdge(0),
     outsideNearestRightEdge(0),