Changes related to the smooth scrolling. We can enable it since icefox has submitted his "division by zero" to Qt, so it should be safe. If we experience any division by

zero or report, we just disable them commenting them out and with a comment to remind ourselves to uncomment them after.

The smooth scrolling is being combined with a good behavior when using the mouse wheel.

Some investigation on QListView found nice stuff for KCategorizedView.

Peter, I have the smooth scrolling for KDirOperator too, let me that one... I have binary incompatible changes merged there with this ones and I am committing everything
together on friday.

CCMAIL: peter.penz@gmx.at

svn path=/trunk/KDE/kdebase/apps/; revision=720918

src/dolphindetailsview.cpp

@@ -108,6 +108,9 @@ DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* contr
     m_viewOptions.font = font;
     m_viewOptions.showDecorationSelected = true;
 
+    setVerticalScrollMode(QListView::ScrollPerPixel);
+    setHorizontalScrollMode(QListView::ScrollPerPixel);
+
     updateDecorationSize();
 }
 
@@ -153,6 +156,11 @@ bool DolphinDetailsView::event(QEvent* event)
         hideColumn(DolphinModel::Rating);
         hideColumn(DolphinModel::Tags);
     }
+    else if (event->type() == QEvent::UpdateRequest) {
+        // A wheel movement will scroll 4 items
+        if (model()->rowCount())
+            verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
+    }
 
     return QTreeView::event(event);
 }

src/kcategorizedview.cpp

@@ -976,7 +976,12 @@ void KCategorizedView::leaveEvent(QEvent *event)
 
 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
 {
-    QListView::startDrag(supportedActions);
+    // FIXME: QAbstractItemView does far better here since it sets the
+    //        pixmap of selected icons to the dragging cursor, but it sets a non
+    //        ARGB window so it is no transparent. Use QAbstractItemView when
+    //        this is fixed on Qt.
+    //QListView::startDrag(supportedActions);
+    QAbstractItemView::startDrag(supportedActions);
 
     d->isDragging = false;
     d->mouseButtonPressed = false;

src/sidebartreeview.cpp

@@ -26,6 +26,7 @@
 #include <QKeyEvent>
 #include <QPainter>
 #include <QHeaderView>
+#include <QScrollBar>
 
 SidebarTreeView::SidebarTreeView(QWidget* parent) :
     QTreeView(parent),
@@ -40,6 +41,8 @@ SidebarTreeView::SidebarTreeView(QWidget* parent) :
     setDragDropMode(QAbstractItemView::DragDrop);
     setDropIndicatorShown(false);
     setAutoExpandDelay(300);
+    setVerticalScrollMode(QListView::ScrollPerPixel);
+    setHorizontalScrollMode(QListView::ScrollPerPixel);
 
     viewport()->setAttribute(Qt::WA_Hover);
 
@@ -69,6 +72,11 @@ bool SidebarTreeView::event(QEvent* event)
         hideColumn(DolphinModel::Tags);
         header()->hide();
     }
+    else if (event->type() == QEvent::UpdateRequest) {
+        // A wheel movement will scroll 1 item
+        if (model()->rowCount())
+            verticalScrollBar()->setSingleStep(sizeHintForRow(0) / 3);
+    }
 
     return QTreeView::event(event);
 }