Draw styled header for the details-view

src/kitemviews/kitemlistcontainer.cpp

@@ -329,15 +329,13 @@ void KItemListContainer::updateGeometries()
 {
     QRect rect = geometry();
 
-    int widthDec = frameWidth() * 2;
-    if (verticalScrollBar()->isVisible()) {
-        widthDec += style()->pixelMetric(QStyle::PM_ScrollBarExtent);
-    }
+    const int widthDec = verticalScrollBar()->isVisible()
+                         ? frameWidth() + style()->pixelMetric(QStyle::PM_ScrollBarExtent)
+                         : frameWidth() * 2;
 
-    int heightDec = frameWidth() * 2;
-    if (horizontalScrollBar()->isVisible()) {
-        heightDec += style()->pixelMetric(QStyle::PM_ScrollBarExtent);
-    }
+    const int heightDec = horizontalScrollBar()->isVisible()
+                          ? frameWidth() + style()->pixelMetric(QStyle::PM_ScrollBarExtent)
+                          : frameWidth() * 2;
 
     rect.adjust(0, 0, -widthDec, -heightDec);
 

src/kitemviews/kitemlistheader.cpp

@@ -19,24 +19,75 @@
 
 #include "kitemlistheader_p.h"
 
+#include "kitemmodelbase.h"
+
+#include <QFontMetricsF>
 #include <QPainter>
+#include <QStyleOptionHeader>
 
 KItemListHeader::KItemListHeader(QGraphicsWidget* parent) :
-    QGraphicsWidget(parent)
+    QGraphicsWidget(parent),
+    m_model(0)
 {
-    resize(0, 20); // TODO...
+    QStyleOptionHeader opt;
+    const QSize headerSize = style()->sizeFromContents(QStyle::CT_HeaderSection, &opt, QSize());
+    resize(0, headerSize.height());
 }
 
 KItemListHeader::~KItemListHeader()
 {
 }
 
+void KItemListHeader::setModel(KItemModelBase* model)
+{
+    if (m_model == model) {
+        return;
+    }
+
+    if (m_model) {
+        disconnect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+                   this, SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
+        disconnect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+                   this, SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+    }
+
+    m_model = model;
+
+    if (m_model) {
+        connect(m_model, SIGNAL(sortRoleChanged(QByteArray,QByteArray)),
+                this, SLOT(slotSortRoleChanged(QByteArray,QByteArray)));
+        connect(m_model, SIGNAL(sortOrderChanged(Qt::SortOrder,Qt::SortOrder)),
+                this, SLOT(slotSortOrderChanged(Qt::SortOrder,Qt::SortOrder)));
+    }
+}
+
+KItemModelBase* KItemListHeader::model() const
+{
+    return m_model;
+}
+
 void KItemListHeader::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 {
     Q_UNUSED(option);
     Q_UNUSED(widget);
-    painter->setPen(Qt::red);
-    painter->drawRect(rect());
+
+    QStyleOption opt;
+    opt.init(widget);
+    opt.rect = rect().toRect();
+    opt.state |= QStyle::State_Horizontal;
+    style()->drawControl(QStyle::CE_HeaderEmptyArea, &opt, painter);
+}
+
+void KItemListHeader::slotSortRoleChanged(const QByteArray& current, const QByteArray& previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
+}
+
+void KItemListHeader::slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous)
+{
+    Q_UNUSED(current);
+    Q_UNUSED(previous);
 }
 
 #include "kitemlistheader_p.moc"

src/kitemviews/kitemlistheader_p.h

@@ -23,6 +23,8 @@
 #include <libdolphin_export.h>
 #include <QGraphicsWidget>
 
+class KItemModelBase;
+
 /**
  * @brief Header for KItemListView that shows the currently used roles.
  */
@@ -34,7 +36,17 @@ public:
     KItemListHeader(QGraphicsWidget* parent = 0);
     virtual ~KItemListHeader();
 
+    void setModel(KItemModelBase* model);
+    KItemModelBase* model() const;
+
     virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
+
+private slots:
+    void slotSortRoleChanged(const QByteArray& current, const QByteArray& previous);
+    void slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
+
+private:
+    KItemModelBase* m_model;
 };
 
 #endif

src/kitemviews/kitemlistview.cpp

@@ -229,6 +229,9 @@ 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->setZValue(1);
         updateHeaderWidth();
         m_layouter->setHeaderHeight(m_header->size().height());
     } else if (!show && m_header) {

src/kitemviews/kitemlistviewlayouter.cpp

@@ -362,7 +362,8 @@ void KItemListViewLayouter::updateVisibleIndexes()
         prevRowIndex -= m_columnCount;
     }
 
-    while (prevRowIndex >= 0 && m_itemBoundingRects[prevRowIndex].bottom() >= m_offset) {
+    const qreal top = m_offset + m_headerHeight;
+    while (prevRowIndex >= 0 && m_itemBoundingRects[prevRowIndex].bottom() >= top) {
         m_firstVisibleIndex = prevRowIndex;
         prevRowIndex -= m_columnCount;
     }