Added net highlighting.

include/painter.h

@@ -109,6 +109,26 @@ public:
         return ( m_activeLayers.count( aLayerId ) > 0 );
     }
 
+    /**
+     * Function GetHighlight
+     * Returns current highlight setting.
+     * @return True if highlight is enabled, false otherwise.
+     */
+    bool GetHighlight() const
+    {
+        return m_highlightEnabled;
+    }
+
+    /**
+     * Function GetHighlightNetCode
+     * Returns netcode of currently highlighted net.
+     * @return Netcode of currently highlighted net.
+     */
+    int GetHighlightNetCode() const
+    {
+        return m_highlightNetcode;
+    }
+
     /**
      * Function SetHighlight
      * Turns on/off highlighting - it may be done for the active layer or the specified net.
@@ -119,9 +139,7 @@ public:
     inline void SetHighlight( bool aEnabled, int aNetcode = -1 )
     {
         m_highlightEnabled = aEnabled;
-
-        if( aNetcode > 0 )
-            m_highlightNetcode = aNetcode;
+        m_highlightNetcode = aNetcode;
     }
 
     /**

pcbnew/tools/selection_tool.cpp

@@ -112,10 +112,17 @@ int SELECTION_TOOL::Main( TOOL_EVENT& aEvent )
         // single click? Select single object
         else if( evt->IsClick( BUT_LEFT ) )
         {
-            if( !m_additive )
-                clearSelection();
+            if( evt->Modifier( MD_CTRL ) )
+            {
+                highlightNet( evt->Position() );
+            }
+            else
+            {
+                if( !m_additive )
+                    clearSelection();
 
-            selectSingle( evt->Position() );
+                selectSingle( evt->Position() );
+            }
         }
 
         // right click? if there is any object - show the context menu
@@ -650,6 +657,30 @@ bool SELECTION_TOOL::selectionContains( const VECTOR2I& aPoint ) const
 }
 
 
+void SELECTION_TOOL::highlightNet( const VECTOR2I& aPoint )
+{
+    KIGFX::RENDER_SETTINGS* render = getView()->GetPainter()->GetSettings();
+    GENERAL_COLLECTORS_GUIDE guide = getEditFrame<PCB_EDIT_FRAME>()->GetCollectorsGuide();
+    GENERAL_COLLECTOR collector;
+    int net = -1;
+
+    // Find a connected item for which we are going to highlight a net
+    collector.Collect( getModel<BOARD>( PCB_T ), GENERAL_COLLECTOR::PadsTracksOrZones,
+                       wxPoint( aPoint.x, aPoint.y ), guide );
+    bool enableHighlight = ( collector.GetCount() > 0 );
+
+    // Obtain net code for the clicked item
+    if( enableHighlight )
+        net = static_cast<BOARD_CONNECTED_ITEM*>( collector[0] )->GetNetCode();
+
+    if( enableHighlight != render->GetHighlight() || net != render->GetHighlightNetCode() )
+    {
+        render->SetHighlight( enableHighlight, net );
+        getView()->UpdateAllLayersColor();
+    }
+}
+
+
 void SELECTION_TOOL::SELECTION::clear()
 {
     items.ClearItemsList();

pcbnew/tools/selection_tool.h

@@ -221,6 +221,14 @@ private:
      */
     bool selectionContains( const VECTOR2I& aPoint ) const;
 
+    /**
+     * Function highlightNet()
+     * Looks for a BOARD_CONNECTED_ITEM in a given spot, and if one is found - it enables
+     * highlight for its net.
+     * @param aPoint is the point where an item is expected (world coordinates).
+     */
+    void highlightNet( const VECTOR2I& aPoint );
+
     /// Visual representation of selection box
     SELECTION_AREA* m_selArea;