Implement keyboard sorting list widget

src/guiengine/event_handler.cpp

@@ -509,7 +509,7 @@ void EventHandler::navigate(const NavigationDirection nav, const int playerID)
         {
             ListWidget* list = (ListWidget*) closest_widget;
             assert(list != NULL);
-            list->setSelectionID(nav == NAV_UP ? list->getItemCount() - 1 : 0);
+            list->focusHeader(nav);
         }
         // Similar exception for vertical tabs, only apply when entering with down/up
         if (closest_widget->m_type == GUIEngine::WTYPE_RIBBON && (nav == NAV_UP || nav == NAV_DOWN))

src/guiengine/skin.cpp

@@ -1822,20 +1822,20 @@ void Skin::drawListHeader(const irr::core::rect< irr::s32 > &rect,
                           Widget* widget)
 {
 #ifndef SERVER_ONLY
+    ListWidget* list = static_cast<ListWidget*>(widget->m_event_handler);
     bool isSelected =
-         (((ListWidget*)widget->m_event_handler)->m_selected_column == widget &&
+        (list->m_selected_column == widget && list->m_choosing_header);
-         ((ListWidget*)widget->m_event_handler)->m_sort_default == false);
 
     drawBoxFromStretchableTexture(widget, rect,
             (isSelected ? SkinConfig::m_render_params["list_header::down"]
                         : SkinConfig::m_render_params["list_header::neutral"]),
             false, NULL /* clip */);
 
-    if (isSelected)
+    if (list->m_selected_column == widget && !list->m_sort_default)
     {
         /** \brief img sets the icon for the column according to sort order **/
         ITexture* img;
-        if (((ListWidget*)widget->m_event_handler)->m_sort_desc)
+        if (list->m_sort_desc)
             img =
                 SkinConfig::m_render_params["list_sort_down::neutral"].getImage();
         else

src/guiengine/widgets/list_widget.cpp

@@ -47,6 +47,7 @@ ListWidget::ListWidget() : Widget(WTYPE_LIST)
     m_sort_col = 0;
     m_sortable = true;
     m_header_created = false;
+    m_choosing_header = false;
 }
 
 // -----------------------------------------------------------------------------
@@ -360,6 +361,9 @@ irr::core::stringw ListWidget::getSelectionLabel(const int cell) const
 
 void ListWidget::selectItemWithLabel(const irr::core::stringw& name)
 {
+    // Disable focusing header for choosing
+    m_choosing_header = false;
+
     CGUISTKListBox* list = getIrrlichtElement<CGUISTKListBox>();
     assert(list != NULL);
     return list->setSelectedByCellText( name.c_str() );
@@ -393,6 +397,9 @@ void ListWidget::setSelectionID(const int index)
     // May only be called AFTER this widget has been add()ed
     assert(m_element != NULL);
 
+    // Disable focusing header for choosing
+    m_choosing_header = false;
+
     CGUISTKListBox* irritem = getIrrlichtElement<CGUISTKListBox>();
 
     // auto-scroll to item when selecting something, don't auto-scroll when selecting nothing
@@ -527,7 +534,7 @@ EventPropagation ListWidget::transmitEvent(Widget* w,
 
         m_sort_col = originator[(m_properties[PROP_ID] + "_column_").size()] - '0';
         m_selected_column = m_header_elements.get(m_sort_col);
-
+        m_choosing_header = true;
         /** \brief Allows sort icon to change depending on sort order **/
 
         /*
@@ -560,6 +567,57 @@ EventPropagation ListWidget::downPressed(const int playerID)
     return moveToNextItem(/*reverse*/ false);
 } // downPressed
 
+// -----------------------------------------------------------------------------
+
+EventPropagation ListWidget::leftPressed(const int playerID)
+{
+    if (m_deactivated || !m_choosing_header)
+        return EVENT_BLOCK;
+
+    m_sort_col--;
+    repairSortCol();
+    m_sort_default = true;
+    m_selected_column = m_header_elements.get(m_sort_col);
+    m_selected_column->setFocusForPlayer(0);
+
+    return EVENT_LET;
+} // upPressed
+
+// -----------------------------------------------------------------------------
+
+EventPropagation ListWidget::rightPressed(const int playerID)
+{
+    if (m_deactivated || !m_choosing_header)
+        return EVENT_BLOCK;
+
+    m_sort_col++;
+    repairSortCol();
+    m_sort_default = true;
+    m_selected_column = m_header_elements.get(m_sort_col);
+    m_selected_column->setFocusForPlayer(0);
+
+    return EVENT_LET;
+} // downPressed
+
+// -----------------------------------------------------------------------------
+
+void ListWidget::focusHeader(const NavigationDirection nav)
+{
+    if (m_header.empty() || getItemCount() == 0)
+    {
+        setSelectionID(nav == NAV_UP ? getItemCount() - 1 : 0);
+    }
+    else
+    {
+        repairSortCol();
+        m_selected_column = m_header_elements.get(m_sort_col);
+        m_selected_column->setFocusForPlayer(0);
+        m_choosing_header = true;
+    }
+}
+
+// -----------------------------------------------------------------------------
+
 EventPropagation ListWidget::moveToNextItem(const bool reverse)
 {
     // if widget is deactivated, do nothing
@@ -570,6 +628,11 @@ EventPropagation ListWidget::moveToNextItem(const bool reverse)
 
     if (stay_within_list)
     {
+        if (m_choosing_header)
+        {
+            m_choosing_header = false;
+            setFocusForPlayer(0);
+        }
         if (reverse)
             setSelectionID(getSelectionID() - 1);
         else
@@ -578,6 +641,17 @@ EventPropagation ListWidget::moveToNextItem(const bool reverse)
     }
     else
     {
+        if (reverse && !m_choosing_header &&
+            m_sort_col < (int)m_header_elements.size())
+        {
+            // Up pressed
+            repairSortCol();
+            m_selected_column = m_header_elements.get(m_sort_col);
+            m_selected_column->setFocusForPlayer(0);
+            setSelectionID(-1); // select nothing
+            m_choosing_header = true;
+            return EVENT_LET;
+        }
         setSelectionID(-1); // select nothing
     }
     return EVENT_BLOCK;

src/guiengine/widgets/list_widget.hpp

@@ -69,6 +69,8 @@ namespace GUIEngine
         /** index of column*/
         int m_sort_col;
 
+        bool m_choosing_header;
+
         struct Column
         {
             irr::core::stringw m_text;
@@ -96,6 +98,16 @@ namespace GUIEngine
 
         bool m_header_created;
 
+        void repairSortCol()
+        {
+            // Exclude scrollbar
+            int max_size = (int)m_header_elements.size() - 1;
+            if (m_sort_col < 0)
+                m_sort_col = max_size - 1;
+            else if (m_sort_col >= max_size)
+                m_sort_col = 0;
+        }
+
     public:
         typedef irr::gui::CGUISTKListBox::ListItem ListItem;
         typedef ListItem::ListCell ListCell;
@@ -266,6 +278,12 @@ namespace GUIEngine
         /** \brief implementing method from base class Widget */
         virtual EventPropagation downPressed(const int playerID);
 
+        /** \brief implementing method from base class Widget */
+        virtual EventPropagation leftPressed(const int playerID);
+
+        /** \brief implementing method from base class Widget */
+        virtual EventPropagation rightPressed(const int playerID);
+
         /** \brief implement common core parts of upPressed and downPressed */ 
         EventPropagation moveToNextItem(const bool down);
         
@@ -282,6 +300,8 @@ namespace GUIEngine
         void addColumn(irr::video::ITexture* tex, int proportion=1) { m_header.push_back( Column(tex, proportion) ); }
 
         void setSortable(bool sortable) { m_sortable = sortable; }
+        void focusHeader(const NavigationDirection nav);
+
     };
 }