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[dolphin.git] / src / kcategorizedview.cpp

diff --git a/src/kcategorizedview.cpp b/src/kcategorizedview.cpp
index d88b170761e974b67646b44331f295c3bd4be18e..7d717abd1f4388319486c27e71cb8a698bac820c 100644 (file)
--- a/src/kcategorizedview.cpp
+++ b/src/kcategorizedview.cpp
@@ -414,6 +414,36 @@ void KCategorizedView::Private::drawDraggedItems(QPainter *painter)
     }
 }
 
+void KCategorizedView::Private::layoutChanged(bool forceItemReload)
+{
+    if ((listView->viewMode() == KCategorizedView::IconMode) && proxyModel &&
+        categoryDrawer && proxyModel->isCategorizedModel() &&
+        ((forceItemReload ||
+          (modelSortRole != proxyModel->sortRole()) ||
+          (modelSortColumn != proxyModel->sortColumn()) ||
+          (modelSortOrder != proxyModel->sortOrder()) ||
+          (modelLastRowCount != proxyModel->rowCount()) ||
+          (modelCategorized != proxyModel->isCategorizedModel()))))
+    {
+        // Force the view to update all elements
+        listView->rowsInsertedArtifficial(QModelIndex(), 0, proxyModel->rowCount() - 1);
+
+        if (!forceItemReload)
+        {
+            modelSortRole = proxyModel->sortRole();
+            modelSortColumn = proxyModel->sortColumn();
+            modelSortOrder = proxyModel->sortOrder();
+            modelLastRowCount = proxyModel->rowCount();
+            modelCategorized = proxyModel->isCategorizedModel();
+        }
+    }
+    else if ((listView->viewMode() == KCategorizedView::IconMode) && proxyModel &&
+             categoryDrawer && proxyModel->isCategorizedModel())
+    {
+        updateScrollbars();
+    }
+}
+
 void KCategorizedView::Private::drawDraggedItems()
 {
     QRect rectToUpdate;
@@ -456,7 +486,7 @@ void KCategorizedView::setGridSize(const QSize &size)
 {
     QListView::setGridSize(size);
 
-    slotLayoutChanged();
+    d->layoutChanged(true);
 }
 
 void KCategorizedView::setModel(QAbstractItemModel *model)
@@ -498,6 +528,8 @@ void KCategorizedView::setModel(QAbstractItemModel *model)
         d->modelSortRole = d->proxyModel->sortRole();
         d->modelSortColumn = d->proxyModel->sortColumn();
         d->modelSortOrder = d->proxyModel->sortOrder();
+        d->modelLastRowCount = d->proxyModel->rowCount();
+        d->modelCategorized = d->proxyModel->isCategorizedModel();
 
         QObject::connect(d->proxyModel,
                          SIGNAL(layoutChanged()),
@@ -513,9 +545,13 @@ void KCategorizedView::setModel(QAbstractItemModel *model)
 
         if (d->proxyModel->rowCount())
         {
-            rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
+            d->layoutChanged(true);
         }
     }
+    else
+    {
+        d->modelCategorized = false;
+    }
 }
 
 QRect KCategorizedView::visualRect(const QModelIndex &index) const
@@ -589,7 +625,10 @@ void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
     {
         if (d->proxyModel)
         {
-            rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
+            if (d->proxyModel->rowCount())
+            {
+                d->layoutChanged(true);
+            }
         }
     }
     else
@@ -707,6 +746,7 @@ void KCategorizedView::paintEvent(QPaintEvent *event)
 
     // Redraw categories
     QStyleOptionViewItem otherOption;
+    bool intersectedInThePast = false;
     foreach (const QString &category, d->categories)
     {
         otherOption = option;
@@ -715,11 +755,18 @@ void KCategorizedView::paintEvent(QPaintEvent *event)
 
         if (otherOption.rect.intersects(area))
         {
+            intersectedInThePast = true;
+
             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 
             d->drawNewCategory(indexToDraw,
                                d->proxyModel->sortRole(), otherOption, &painter);
         }
+        else if (intersectedInThePast)
+        {
+            break; // the visible area has been finished, we don't need to keep asking, the rest won't intersect
+                   // this is doable because we know that categories are correctly ordered on the list
+        }
     }
 
     if (d->mouseButtonPressed && !d->isDragging)
@@ -1330,19 +1377,7 @@ void KCategorizedView::updateGeometries()
 
 void KCategorizedView::slotLayoutChanged()
 {
-    if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
-        d->categoryDrawer && d->proxyModel->isCategorizedModel() &&
-        ((d->modelSortRole != d->proxyModel->sortRole()) ||
-         (d->modelSortColumn != d->proxyModel->sortColumn()) ||
-         (d->modelSortOrder != d->proxyModel->sortOrder())))
-    {
-        // Force the view to update all elements
-        rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
-
-        d->modelSortRole = d->proxyModel->sortRole();
-        d->modelSortColumn = d->proxyModel->sortColumn();
-        d->modelSortOrder = d->proxyModel->sortOrder();
-    }
+    d->layoutChanged();
 }
 
 #include "kcategorizedview.moc"