Schematic object hit testing improvements.

CHANGELOG.txt

@@ -4,6 +4,17 @@ KiCad ChangeLog 2010
 Please add newer entries at the top, list the date and your name with
 email address.
 
+2010-dec-13 UPDATE Wayne Stambaugh <stambaughw@verizon.net>
+================================================================================
+++common
+  * Make base marker hit test method const.
+++EESchema
+  * Improve hit testing for schematic components.
+  * Add initial support for hit test filtering.
+  * Moved static function CountConnectedItems() into SCH_SCREEN object.
+  * Add IsConnected() method to SCH_ITEM object.
+
+
 2010-dec-10 UPDATE Wayne Stambaugh <stambaughw@verizon.net>
 ================================================================================
 ++All

common/class_marker_base.cpp

@@ -112,9 +112,7 @@ void MARKER_BASE::SetData( int aErrorCode, const wxPoint& aMarkerPos,
 }
 
 
-/******************************************************/
+bool MARKER_BASE::HitTestMarker( const wxPoint& refPos ) const
-bool MARKER_BASE::HitTestMarker( const wxPoint& refPos )
-/******************************************************/
 {
     wxPoint rel_pos = refPos - m_Pos;
     rel_pos.x /= m_ScalingFactor;
@@ -123,6 +121,7 @@ bool MARKER_BASE::HitTestMarker( const wxPoint& refPos )
     return m_ShapeBoundingBox.Inside( rel_pos );
 }
 
+
 /**
  * Function GetBoundingBoxMarker
  * returns the orthogonal, bounding box of this object for display purposes.

common/sch_item_struct.cpp

@@ -94,3 +94,12 @@ bool SCH_ITEM::Matches( const wxString& aText, wxFindReplaceData& aSearchData )
 
     return text.MakeUpper().Find( searchText.MakeUpper() ) != wxNOT_FOUND;
 }
+
+
+bool SCH_ITEM::IsConnected( const wxPoint& aPosition ) const
+{
+    if( m_Flags & STRUCT_DELETED || m_Flags & SKIP_STRUCT )
+        return false;
+
+    return DoIsConnected( aPosition );
+}

eeschema/bus-wire-junction.cpp

@@ -769,7 +769,7 @@ static bool IsTerminalPoint( SCH_SCREEN* screen, const wxPoint& pos, int layer )
         if( item )
             return TRUE;
 
-        pin = LocateAnyPin( screen->GetDrawItems(), pos, &LibItem );
+        pin = screen->GetPin( pos, &LibItem );
 
         if( pin && LibItem )
         {

eeschema/controle.cpp

@@ -66,7 +66,7 @@ SCH_ITEM* SCH_EDIT_FRAME::SchematicGeneralLocateAndDisplay( bool IncludePin )
         break;
 
     case SCH_COMPONENT_T:
-        Pin = LocateAnyPin( GetScreen()->GetDrawItems(), GetScreen()->m_Curseur, &LibItem );
+        Pin = GetScreen()->GetPin( GetScreen()->m_Curseur, &LibItem );
         if( Pin )
             break;  // Priority is probing a pin first
         LibItem = (SCH_COMPONENT*) DrawStruct;
@@ -74,7 +74,7 @@ SCH_ITEM* SCH_EDIT_FRAME::SchematicGeneralLocateAndDisplay( bool IncludePin )
         break;
 
     default:
-        Pin = LocateAnyPin( GetScreen()->GetDrawItems(), GetScreen()->m_Curseur, &LibItem );
+        Pin = GetScreen()->GetPin( GetScreen()->m_Curseur, &LibItem );
         break;
 
     case LIB_PIN_T:

eeschema/delete.cpp

@@ -20,52 +20,6 @@
 void DeleteItemsInList( WinEDA_DrawPanel* panel, PICKED_ITEMS_LIST& aItemsList );
 
 
-/*
- * Count number of items connected to point pos :
- *     pins, end wire or bus, and junctions if TstJunction == TRUE
- * Return this count
- *
- * Used by SCH_EDIT_FRAME::DeleteConnection()
- */
-static int CountConnectedItems( SCH_EDIT_FRAME* frame, SCH_ITEM* ListStruct, wxPoint pos,
-                                bool TstJunction )
-{
-    SCH_ITEM* Struct;
-    int       count = 0;
-
-    if( frame->LocatePinEnd( ListStruct, pos ) )
-        count++;
-
-    for( Struct = ListStruct; Struct != NULL; Struct = Struct->Next() )
-    {
-        if( Struct->m_Flags & STRUCT_DELETED )
-            continue;
-        if( Struct->m_Flags & SKIP_STRUCT )
-            continue;
-
-
-        if( TstJunction && ( Struct->Type() == SCH_JUNCTION_T ) )
-        {
-            #define JUNCTION ( (SCH_JUNCTION*) Struct )
-            if( JUNCTION->m_Pos == pos )
-                count++;
-            #undef JUNCTION
-        }
-
-        if( Struct->Type() != SCH_LINE_T )
-            continue;
-
-        #define SEGM ( (SCH_LINE*) Struct )
-        if( SEGM->IsEndPoint( pos ) )
-            count++;
-        #undef SEGM
-    }
-
-    return count;
-}
-
-
-
 /*
  * Mark to "CANDIDATE" all wires or junction connected to "segment" in list
  * "ListStruct"
@@ -123,24 +77,23 @@ static bool MarkConnected( SCH_EDIT_FRAME* frame, SCH_ITEM* ListStruct, SCH_LINE
  */
 void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
 {
-    wxPoint refpos = GetScreen()->m_Curseur;
+    SCH_SCREEN* screen = GetScreen();
+    wxPoint refpos = screen->m_Curseur;
     SCH_ITEM* DelStruct;
     PICKED_ITEMS_LIST pickList;
 
     /* Clear .m_Flags member for all items */
-    for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL; DelStruct = DelStruct->Next() )
+    screen->ClearDrawingState();
-        DelStruct->m_Flags = 0;
+    BreakSegmentOnJunction( screen );
-
-    BreakSegmentOnJunction( GetScreen() );
 
     /* Locate all the wires, bus or junction under the mouse cursor, and put
      * them in a list of items to delete
      */
     ITEM_PICKER picker( NULL, UR_DELETED );
-    SCH_SCREEN* screen = GetScreen();
+
     // Save the list entry point of this screen
     SCH_ITEM* savedItems = screen->GetDrawItems();
-    DelStruct = GetScreen()->GetDrawItems();
+    DelStruct = screen->GetDrawItems();
 
     while( DelStruct
            && ( DelStruct = PickStruct( screen->m_Curseur, screen,
@@ -157,13 +110,13 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
         screen->SetDrawItems( DelStruct );
     }
 
-    GetScreen()->SetDrawItems( savedItems );
+    screen->SetDrawItems( savedItems );
 
     /* Mark all wires, junctions, .. connected to one of the item to delete
      */
     if( DeleteFullConnection )
     {
-        for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL;
+        for( DelStruct = screen->GetDrawItems(); DelStruct != NULL;
              DelStruct = DelStruct->Next() )
         {
             if( !(DelStruct->m_Flags & SELECTEDNODE) )
@@ -174,12 +127,12 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
             if( DelStruct->Type() != SCH_LINE_T )
                 continue;
 
-            MarkConnected( this, GetScreen()->GetDrawItems(), SEGM );
+            MarkConnected( this, screen->GetDrawItems(), SEGM );
             #undef SEGM
         }
 
         // Search all removable wires (i.e wire with one new dangling end )
-        for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL;
+        for( DelStruct = screen->GetDrawItems(); DelStruct != NULL;
              DelStruct = DelStruct->Next() )
         {
             bool noconnect = FALSE;
@@ -200,7 +153,7 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
              * an STRUCT_DELETED wire, and now is not connected, the wire can
              * be deleted */
             EDA_ITEM* removed_struct;
-            for( removed_struct = GetScreen()->GetDrawItems();
+            for( removed_struct = screen->GetDrawItems();
                  removed_struct != NULL;
                  removed_struct = removed_struct->Next() )
             {
@@ -215,14 +168,13 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
                     break;
             }
 
-            if( WIRE && !CountConnectedItems( this, GetScreen()->GetDrawItems(),
+            if( WIRE && !screen->CountConnectedItems( SEGM->m_Start, true ) )
-                                              SEGM->m_Start, TRUE ) )
                 noconnect = TRUE;
 
             /* Test the SEGM->m_End point: if this point was connected to
              * an STRUCT_DELETED wire, and now is not connected, the wire
              * can be deleted */
-            for( removed_struct = GetScreen()->GetDrawItems();
+            for( removed_struct = screen->GetDrawItems();
                  removed_struct != NULL;
                  removed_struct = removed_struct->Next() )
             {
@@ -234,8 +186,7 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
                     break;
             }
 
-            if( removed_struct &&
+            if( removed_struct && !screen->CountConnectedItems( SEGM->m_End, true ) )
-               !CountConnectedItems( this, GetScreen()->GetDrawItems(), SEGM->m_End, TRUE ) )
                 noconnect = TRUE;
 
             DelStruct->m_Flags &= ~SKIP_STRUCT;
@@ -248,17 +199,16 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
                 picker.m_PickedItemType = DelStruct->Type();
                 pickList.PushItem( picker );
 
-                DelStruct  = GetScreen()->GetDrawItems();
+                DelStruct = screen->GetDrawItems();
             }
             #undef SEGM
         }
 
         // Delete redundant junctions (junctions which connect < 3 end wires
         // and no pin are removed)
-        for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL;
+        for( DelStruct = screen->GetDrawItems(); DelStruct != NULL;
              DelStruct = DelStruct->Next() )
         {
-            int count;
             if( DelStruct->m_Flags & STRUCT_DELETED )
                 continue;
 
@@ -268,9 +218,8 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
             if( DelStruct->Type() == SCH_JUNCTION_T )
             {
                 #define JUNCTION ( (SCH_JUNCTION*) DelStruct )
-                count = CountConnectedItems( this, GetScreen()->GetDrawItems(),
+
-                                             JUNCTION->m_Pos, FALSE );
+                if( screen->CountConnectedItems( JUNCTION->m_Pos, false ) <= 2 )
-                if( count <= 2 )
                 {
                     DelStruct->m_Flags |= STRUCT_DELETED;
 
@@ -284,8 +233,9 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
         }
 
         // Delete labels attached to wires
-        wxPoint pos = GetScreen()->m_Curseur;
+        wxPoint pos = screen->m_Curseur;
-        for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL;
+
+        for( DelStruct = screen->GetDrawItems(); DelStruct != NULL;
              DelStruct = DelStruct->Next() )
         {
             if( DelStruct->m_Flags & STRUCT_DELETED )
@@ -295,8 +245,7 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
                 continue;
 
             GetScreen()->m_Curseur = ( (SCH_TEXT*) DelStruct )->m_Pos;
-            EDA_ITEM* TstStruct = PickStruct( GetScreen()->m_Curseur, GetScreen(),
+            EDA_ITEM* TstStruct = PickStruct( screen->m_Curseur, GetScreen(), WIREITEM | BUSITEM );
-                                              WIREITEM | BUSITEM );
 
             if( TstStruct && TstStruct->m_Flags & STRUCT_DELETED )
             {
@@ -309,12 +258,10 @@ void SCH_EDIT_FRAME::DeleteConnection( bool DeleteFullConnection )
             }
         }
 
-        GetScreen()->m_Curseur = pos;
+        screen->m_Curseur = pos;
     }
 
-    for( DelStruct = GetScreen()->GetDrawItems(); DelStruct != NULL;
+    screen->ClearDrawingState();
-         DelStruct = DelStruct->Next() )
-        DelStruct->m_Flags = 0;
 
     if( pickList.GetCount() )
     {
@@ -356,8 +303,7 @@ bool LocateAndDeleteItem( SCH_EDIT_FRAME* frame, wxDC* DC )
     if( DelStruct == NULL )
         DelStruct = PickStruct( screen->m_Curseur, screen, DRAWITEM );
     if( DelStruct == NULL )
-        DelStruct = PickStruct( screen->m_Curseur, screen,
+        DelStruct = PickStruct( screen->m_Curseur, screen, TEXTITEM | LABELITEM );
-                                TEXTITEM | LABELITEM );
     if( DelStruct == NULL )
         DelStruct = PickStruct( screen->m_Curseur, screen, LIBITEM );
     if( DelStruct == NULL )

eeschema/locate.cpp

@@ -20,8 +20,7 @@
 
 
 static SCH_ITEM* LastSnappedStruct = NULL;
-static bool SnapPoint2( const wxPoint& aPosRef, int SearchMask,
+static bool SnapPoint2( const wxPoint& aPosRef, int SearchMask, SCH_ITEM* DrawList );
-                        SCH_ITEM* DrawList, double aScaleFactor );
 
 
 /**
@@ -42,9 +41,9 @@ SCH_COMPONENT* LocateSmallestComponent( SCH_SCREEN* Screen )
 
     while( DrawList )
     {
-        if( !SnapPoint2( Screen->m_MousePosition, LIBITEM, DrawList, Screen->GetZoom() ) )
+        if( !SnapPoint2( Screen->m_MousePosition, LIBITEM, DrawList ) )
         {
-            if( !SnapPoint2( Screen->m_Curseur, LIBITEM, DrawList, Screen->GetScalingFactor() ) )
+            if( !SnapPoint2( Screen->m_Curseur, LIBITEM, DrawList ) )
                 break;
         }
 
@@ -106,7 +105,7 @@ SCH_ITEM* PickStruct( const wxPoint& refpos, SCH_SCREEN* screen, int SearchMask
     if( screen == NULL || screen->GetDrawItems() == NULL )
         return NULL;
 
-    if( SnapPoint2( refpos, SearchMask, screen->GetDrawItems(), screen->GetScalingFactor() ) )
+    if( SnapPoint2( refpos, SearchMask, screen->GetDrawItems() ) )
     {
         return LastSnappedStruct;
     }
@@ -161,7 +160,7 @@ int PickItemsInBlock( BLOCK_SELECTOR& aBlock, SCH_SCREEN* aScreen )
 * a point. This variable is global to this module only (see above).          *
 * The routine returns true if point was snapped.                             *
 *****************************************************************************/
-bool SnapPoint2( const wxPoint& aPosRef, int SearchMask, SCH_ITEM* DrawList, double aScaleFactor )
+bool SnapPoint2( const wxPoint& aPosRef, int SearchMask, SCH_ITEM* DrawList )
 {
     for( ; DrawList != NULL; DrawList = DrawList->Next() )
     {
@@ -367,40 +366,27 @@ SCH_SHEET_PIN* LocateSheetLabel( SCH_SHEET* Sheet, const wxPoint& pos )
 
 LIB_PIN* LocateAnyPin( SCH_ITEM* DrawList, const wxPoint& RefPos, SCH_COMPONENT** libpart )
 {
-    SCH_ITEM* DrawStruct;
+    SCH_ITEM* item;
-    LIB_COMPONENT* Entry;
+    SCH_COMPONENT* component = NULL;
-    SCH_COMPONENT* schItem = NULL;
+    LIB_PIN* pin = NULL;
-    LIB_PIN* Pin = NULL;
 
-    for( DrawStruct = DrawList; DrawStruct != NULL; DrawStruct = DrawStruct->Next() )
+    for( item = DrawList; item != NULL; item = item->Next() )
     {
-        if( DrawStruct->Type() != SCH_COMPONENT_T )
+        if( item->Type() != SCH_COMPONENT_T )
             continue;
 
-        schItem = (SCH_COMPONENT*) DrawStruct;
+        component = (SCH_COMPONENT*) item;
-        Entry   = CMP_LIBRARY::FindLibraryComponent( schItem->m_ChipName );
 
-        if( Entry == NULL )
+        pin = (LIB_PIN*) component->GetDrawItem( RefPos, LIB_PIN_T );
-            continue;
 
-        /* we use LocateDrawItem to locate pins. but this function suppose a
+        if( pin )
-         * component.
-         * at 0,0 location
-         * So we must calculate the ref position relative to the component
-         */
-        wxPoint libPos = RefPos - schItem->m_Pos;
-        Pin = (LIB_PIN*) Entry->LocateDrawItem( schItem->m_Multi,
-                                                schItem->m_Convert,
-                                                LIB_PIN_T,
-                                                libPos, schItem->m_Transform );
-        if( Pin )
             break;
     }
 
     if( libpart )
-        *libpart = schItem;
+        *libpart = component;
 
-    return Pin;
+    return pin;
 }
 
 

eeschema/sch_component.cpp

@@ -1361,14 +1361,7 @@ bool SCH_COMPONENT::Load( LINE_READER& aLine, wxString& aErrorMsg )
 }
 
 
-/**
+EDA_Rect SCH_COMPONENT::GetBodyBoundingBox() const
- * Function GetBoundaryBox
- * returns the orthogonal, bounding box of this object for display purposes.
- * This box should be an enclosing perimeter for graphic items and pins.
- * this include only fields defined in library
- * use GetBoundingBox() to include fields in schematic
- */
-EDA_Rect SCH_COMPONENT::GetBoundingBox() const
 {
     LIB_COMPONENT* Entry = CMP_LIBRARY::FindLibraryComponent( m_ChipName );
     EDA_Rect       bBox;
@@ -1406,11 +1399,25 @@ EDA_Rect SCH_COMPONENT::GetBoundingBox() const
     bBox.SetHeight( y2 - y1 );
 
     bBox.Offset( m_Pos );
+    return bBox;
+}
 
-    // Include BoundingBoxes of fields
+
+/**
+ * Function GetBoundaryBox
+ * returns the orthogonal, bounding box of this object for display purposes.
+ * This box should be an enclosing perimeter for graphic items and pins.
+ * this include only fields defined in library
+ * use GetBoundingBox() to include fields in schematic
+ */
+EDA_Rect SCH_COMPONENT::GetBoundingBox() const
+{
+    EDA_Rect bBox = GetBodyBoundingBox();
+
+    // Include BoundingBoxes of fields if they are visible and not empty.
     for( int ii = 0; ii < GetFieldCount(); ii++ )
     {
-        if( !GetField( ii )->IsVisible() )
+        if( !GetField( ii )->IsVisible() || GetField( ii )->IsVoid() )
             continue;
 
         bBox.Merge( GetField( ii )->GetBoundingBox() );
@@ -1441,12 +1448,15 @@ void SCH_COMPONENT::DisplayInfo( WinEDA_DrawFrame* frame )
         msg = _( "Power symbol" );
     else
         msg = _( "Name" );
+
     frame->AppendMsgPanel( msg, GetField( VALUE )->m_Text, DARKCYAN );
 
     // Display component reference in library and library
     frame->AppendMsgPanel( _( "Component" ), m_ChipName, BROWN );
+
     if( alias->GetName() != root_component->GetName() )
         frame->AppendMsgPanel( _( "Alias of" ), root_component->GetName(), BROWN );
+
     frame->AppendMsgPanel( _( "Library" ), alias->GetLibraryName(), BROWN );
 
     // Display description of the component, and keywords found in lib
@@ -1664,13 +1674,50 @@ void SCH_COMPONENT::GetConnectionPoints( vector< wxPoint >& aPoints ) const
 }
 
 
-bool SCH_COMPONENT::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+LIB_DRAW_ITEM* SCH_COMPONENT::GetDrawItem( const wxPoint& aPosition, KICAD_T aType )
 {
-    EDA_Rect rect = GetBoundingBox();
+    LIB_COMPONENT* component = CMP_LIBRARY::FindLibraryComponent( m_ChipName );
 
-    rect.Inflate( aAccuracy );
+    if( component == NULL )
+        return NULL;
 
-    return rect.Inside( aPoint );
+    // Calculate the position relative to the component.
+    wxPoint libPosition = aPosition - m_Pos;
+
+    return component->LocateDrawItem( m_Multi, m_Convert, aType, libPosition, m_Transform );
+}
+
+
+bool SCH_COMPONENT::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+{
+    EDA_Rect bBox;
+
+    if( aFilter & FIELD_T )
+    {
+        // Test the bounding boxes of fields if they are visible and not empty.
+        for( int ii = 0; ii < GetFieldCount(); ii++ )
+        {
+            if( !GetField( ii )->IsVisible() || GetField( ii )->IsVoid() )
+                continue;
+
+            bBox = GetField( ii )->GetBoundingBox();
+            bBox.Inflate( aAccuracy );
+
+            if( bBox.Inside( aPoint ) )
+                return true;
+        }
+    }
+
+    if( aFilter & COMPONENT_T )
+    {
+        bBox = GetBodyBoundingBox();
+        bBox.Inflate( aAccuracy );
+
+        if( bBox.Inside( aPoint ) )
+            return true;
+    }
+
+    return false;
 }
 
 
@@ -1685,3 +1732,19 @@ bool SCH_COMPONENT::DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccu
 
     return rect.Intersects( GetBoundingBox() );
 }
+
+
+bool SCH_COMPONENT::DoIsConnected( const wxPoint& aPosition ) const
+{
+    vector< wxPoint > pts;
+
+    GetConnectionPoints( pts );
+
+    for( size_t i = 0;  i < pts.size();  i++ )
+    {
+        if( pts[i] == aPosition )
+            return true;
+    }
+
+    return false;
+}

eeschema/sch_component.h

@@ -12,6 +12,7 @@
 
 
 class SCH_SHEET_PATH;
+class LIB_DRAW_ITEM;
 class LIB_PIN;
 class LIB_COMPONENT;
 
@@ -86,6 +87,8 @@ private:
 
     void Init( const wxPoint& pos = wxPoint( 0, 0 ) );
 
+    EDA_Rect GetBodyBoundingBox() const;
+
 public:
     SCH_COMPONENT( const wxPoint& pos = wxPoint( 0, 0 ), SCH_ITEM* aParent = NULL );
 
@@ -367,6 +370,17 @@ public:
 
     virtual void GetConnectionPoints( vector< wxPoint >& aPoints ) const;
 
+    /**
+     * Function GetDrawItem().
+     * Return the component library item at \a aPosition that is part of this component.
+     *
+     * @param aPosition - Schematic position of the component library object.
+     * @param aType - Type of component library object to find or any if set to TYPE_NOT_INIT.
+     * @return A pointer to the component library object if found, otherwise NULL.
+     */
+    LIB_DRAW_ITEM* GetDrawItem( const wxPoint& aPosition, KICAD_T aType = TYPE_NOT_INIT );
+
+
 #if defined(DEBUG)
 
     /**
@@ -381,8 +395,9 @@ public:
 #endif
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
+    virtual bool DoIsConnected( const wxPoint& aPosition ) const;
 };
 
 

eeschema/sch_items.cpp

@@ -246,8 +246,11 @@ void SCH_BUS_ENTRY::GetConnectionPoints( vector< wxPoint >& aPoints ) const
 }
 
 
-bool SCH_BUS_ENTRY::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_BUS_ENTRY::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & BUS_ENTRY_T ) )
+        return false;
+
     return TestSegmentHit( aPoint, m_Pos, m_End(), aAccuracy );
 }
 
@@ -421,8 +424,11 @@ void SCH_JUNCTION::Show( int nestLevel, std::ostream& os )
 #endif
 
 
-bool SCH_JUNCTION::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_JUNCTION::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & JUNCTION_T ) )
+        return false;
+
     EDA_Rect rect = GetBoundingBox();
 
     rect.Inflate( aAccuracy );
@@ -444,6 +450,12 @@ bool SCH_JUNCTION::DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccur
 }
 
 
+bool SCH_JUNCTION::DoIsConnected( const wxPoint& aPosition ) const
+{
+    return m_Pos == aPosition;
+}
+
+
 /************************/
 /* class SCH_NO_CONNECT */
 /************************/
@@ -593,8 +605,11 @@ void SCH_NO_CONNECT::GetConnectionPoints( vector< wxPoint >& aPoints ) const
 }
 
 
-bool SCH_NO_CONNECT::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_NO_CONNECT::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & NO_CONNECT_T ) )
+        return false;
+
     int delta = ( ( m_Size.x + g_DrawDefaultLineThickness ) / 2 ) + aAccuracy;
 
     wxPoint dist = aPoint - m_Pos;
@@ -1007,9 +1022,22 @@ void SCH_LINE::GetConnectionPoints( vector< wxPoint >& aPoints ) const
 }
 
 
-bool SCH_LINE::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_LINE::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
-    return TestSegmentHit( aPoint, m_Start, m_End, aAccuracy );
+    if( !( aFilter & ( DRAW_ITEM_T | WIRE_T | BUS_T ) ) )
+        return false;
+
+    if( ( ( aFilter & DRAW_ITEM_T ) && ( m_Layer == LAYER_NOTES ) )
+        || ( ( aFilter & WIRE_T ) && ( m_Layer == LAYER_WIRE ) )
+        || ( ( aFilter & BUS_T ) && ( m_Layer == LAYER_BUS ) ) )
+    {
+        if( aFilter & EXCLUDE_WIRE_BUS_ENDPOINTS && IsEndPoint( aPoint )
+            || aFilter & WIRE_BUS_ENDPOINTS_ONLY && !IsEndPoint( aPoint )
+            || TestSegmentHit( aPoint, m_Start, m_End, aAccuracy ) )
+            return true;
+    }
+
+    return false;
 }
 
 
@@ -1026,6 +1054,15 @@ bool SCH_LINE::DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy
 }
 
 
+bool SCH_LINE::DoIsConnected( const wxPoint& aPosition ) const
+{
+    if( m_Layer != LAYER_WIRE && m_Layer != LAYER_BUS )
+        return false;
+
+    return IsEndPoint( aPosition );
+}
+
+
 /**********************/
 /* Class SCH_POLYLINE */
 /**********************/
@@ -1219,8 +1256,11 @@ void SCH_POLYLINE::Rotate( wxPoint rotationPoint )
 }
 
 
-bool SCH_POLYLINE::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_POLYLINE::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & ( DRAW_ITEM_T | WIRE_T | BUS_T ) ) )
+        return false;
+
     for( size_t i = 0;  i < m_PolyPoints.size() - 1;  i++ )
     {
         if( TestSegmentHit( aPoint, m_PolyPoints[i], m_PolyPoints[i + 1], aAccuracy ) )

eeschema/sch_items.h

@@ -131,8 +131,9 @@ public:
 #endif
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
+    virtual bool DoIsConnected( const wxPoint& aPosition ) const;
 };
 
 
@@ -215,7 +216,7 @@ public:
     virtual void GetConnectionPoints( vector< wxPoint >& aPoints ) const;
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
 };
 
@@ -311,7 +312,7 @@ public:
     virtual void GetConnectionPoints( vector< wxPoint >& aPoints ) const;
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
 };
 
@@ -400,7 +401,7 @@ public:
     virtual void Rotate( wxPoint rotationPoint );
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
 };
 
@@ -486,8 +487,9 @@ public:
 #endif
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
+    virtual bool DoIsConnected( const wxPoint& aPosition ) const;
 };
 
 

eeschema/sch_marker.cpp

@@ -192,3 +192,13 @@ bool SCH_MARKER::IsSelectStateChanged( const wxRect& aRect )
 
     return previousState != IsSelected();
 }
+
+
+bool SCH_MARKER::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+{
+    if( !( aFilter & MARKER_T ) )
+        return false;
+
+    return HitTestMarker( aPoint );
+}
+

eeschema/sch_marker.h

@@ -52,16 +52,6 @@ public:
      */
     bool Save( FILE* aFile ) const;
 
-    /**
-     * Function HitTest
-     * @return true if the point aPosRef is within item area
-     * @param aPosRef = a wxPoint to test
-     */
-    bool HitTest( const wxPoint& aPosRef )
-    {
-        return HitTestMarker( aPosRef );
-    }
-
     /**
      * Function GetBoundingBox
      * returns the orthogonal, bounding box of this object for display purposes.
@@ -113,6 +103,8 @@ public:
     void         Show( int nestLevel, std::ostream& os );
 
 #endif
+
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
 };
 
 #endif /* _TYPE_SCH_MARKER_H_ */

eeschema/sch_screen.cpp

@@ -15,6 +15,7 @@
 #include "class_library.h"
 #include "sch_items.h"
 #include "sch_sheet.h"
+#include "sch_component.h"
 
 #include <boost/foreach.hpp>
 
@@ -376,6 +377,50 @@ void SCH_SCREEN::ClearDrawingState()
 }
 
 
+LIB_PIN* SCH_SCREEN::GetPin( const wxPoint& aPosition, SCH_COMPONENT** aComponent )
+{
+    SCH_ITEM* item;
+    SCH_COMPONENT* component = NULL;
+    LIB_PIN* pin = NULL;
+
+    for( item = GetDrawItems(); item != NULL; item = item->Next() )
+    {
+        if( item->Type() != SCH_COMPONENT_T )
+            continue;
+
+        component = (SCH_COMPONENT*) item;
+
+        pin = (LIB_PIN*) component->GetDrawItem( aPosition, LIB_PIN_T );
+
+        if( pin )
+            break;
+    }
+
+    if( aComponent )
+        *aComponent = component;
+
+    return pin;
+}
+
+
+int SCH_SCREEN::CountConnectedItems( const wxPoint& aPos, bool aTestJunctions ) const
+{
+    SCH_ITEM* item;
+    int       count = 0;
+
+    for( item = GetDrawItems(); item != NULL; item = item->Next() )
+    {
+        if( item->Type() == SCH_JUNCTION_T  && !aTestJunctions )
+            continue;
+
+        if( item->IsConnected( aPos ) )
+            count++;
+    }
+
+    return count;
+}
+
+
 /******************************************************************/
 /* Class SCH_SCREENS to handle the list of screens in a hierarchy */
 /******************************************************************/

eeschema/sch_sheet.cpp

@@ -1136,8 +1136,11 @@ void SCH_SHEET::GetConnectionPoints( vector< wxPoint >& aPoints ) const
 }
 
 
-bool SCH_SHEET::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_SHEET::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & SHEET_T ) )
+        return false;
+
     EDA_Rect rect = GetBoundingBox();
 
     rect.Inflate( aAccuracy );

eeschema/sch_sheet.h

@@ -524,7 +524,7 @@ protected:
     void renumberLabels();
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
 };
 

eeschema/sch_text.cpp

@@ -671,8 +671,11 @@ EDA_Rect SCH_TEXT::GetBoundingBox() const
 }
 
 
-bool SCH_TEXT::DoHitTest( const wxPoint& aPoint, int aAccuracy ) const
+bool SCH_TEXT::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
 {
+    if( !( aFilter & TEXT_T ) )
+        return false;
+
     return TextHitTest( aPoint, aAccuracy );
 }
 
@@ -918,6 +921,15 @@ EDA_Rect SCH_LABEL::GetBoundingBox() const
 }
 
 
+bool SCH_LABEL::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+{
+    if( !( aFilter & LABEL_T ) )
+        return false;
+
+    return TextHitTest( aPoint, aAccuracy );
+}
+
+
 SCH_GLOBALLABEL::SCH_GLOBALLABEL( const wxPoint& pos, const wxString& text ) :
     SCH_TEXT( pos, text, SCH_GLOBAL_LABEL_T )
 {
@@ -1358,6 +1370,15 @@ EDA_Rect SCH_GLOBALLABEL::GetBoundingBox() const
 }
 
 
+bool SCH_GLOBALLABEL::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+{
+    if( !( aFilter & LABEL_T ) )
+        return false;
+
+    return TextHitTest( aPoint, aAccuracy );
+}
+
+
 SCH_HIERLABEL::SCH_HIERLABEL( const wxPoint& pos, const wxString& text, KICAD_T aType ) :
     SCH_TEXT( pos, text, aType )
 {
@@ -1719,3 +1740,12 @@ void SCH_HIERLABEL::Rotate( wxPoint rotationPoint )
     RotatePoint( &m_Pos, rotationPoint, 900 );
     SetSchematicTextOrientation( (GetSchematicTextOrientation() + 3) % 4 );
 }
+
+
+bool SCH_HIERLABEL::DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+{
+    if( !( aFilter & LABEL_T ) )
+        return false;
+
+    return TextHitTest( aPoint, aAccuracy );
+}

eeschema/sch_text.h

@@ -196,7 +196,7 @@ public:
 #endif
 
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const;
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const;
 };
 
@@ -273,6 +273,9 @@ public:
      * @return True if the schematic label loaded successfully.
      */
     virtual bool Load( LINE_READER& aLine, wxString& aErrorMsg );
+
+private:
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
 };
 
 
@@ -363,6 +366,9 @@ public:
     virtual void    Mirror_Y( int aYaxis_position );
     virtual void    Mirror_X( int aXaxis_position );
     virtual void    Rotate( wxPoint rotationPoint );
+
+private:
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
 };
 
 
@@ -455,6 +461,9 @@ public:
     virtual void    Mirror_Y( int aYaxis_position );
     virtual void    Mirror_X( int aXaxis_position );
     virtual void    Rotate( wxPoint rotationPoint );
+
+private:
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const;
 };
 
 #endif /* CLASS_TEXT_LABEL_H */

include/class_marker_base.h

@@ -178,7 +178,7 @@ public:
      * @param ref_pos A wxPoint to test
      * @return bool - true if a hit, else false
      */
-    bool     HitTestMarker( const wxPoint& ref_pos );
+    bool     HitTestMarker( const wxPoint& ref_pos ) const;
 
     /**
      * Function GetBoundingBoxMarker

include/class_sch_screen.h

@@ -10,6 +10,10 @@
 #include "class_base_screen.h"
 
 
+class LIB_PIN;
+class SCH_COMPONENT;
+
+
 /* Max number of sheets in a hierarchy project: */
 #define NB_MAX_SHEET 500
 
@@ -107,6 +111,10 @@ public:
      */
     void ClearDrawingState();
 
+    int CountConnectedItems( const wxPoint& aPos, bool aTestJunctions ) const;
+
+    LIB_PIN* GetPin( const wxPoint& aPosition, SCH_COMPONENT** aComponent = NULL );
+
     virtual void AddItem( SCH_ITEM* aItem ) { BASE_SCREEN::AddItem( (EDA_ITEM*) aItem ); }
     virtual void InsertItem(  EDA_ITEMS::iterator aIter, SCH_ITEM* aItem )
     {

include/sch_item_struct.h

@@ -17,6 +17,27 @@ class SCH_EDIT_FRAME;
 class wxFindReplaceData;
 
 
+// Schematic item filter mask for hit test objects in schematic editor.
+enum SCH_FILTER_T {
+    COMPONENT_T         = 0x0001,
+    WIRE_T              = 0X0002,
+    BUS_T               = 0x0004,
+    BUS_ENTRY_T         = 0x0008,
+    JUNCTION_T          = 0x0010,
+    DRAW_ITEM_T         = 0x0020,
+    TEXT_T              = 0x0040,
+    LABEL_T             = 0x0080,
+    SHEET_T             = 0x0100,
+    MARKER_T            = 0x0200,
+    NO_CONNECT_T        = 0x0400,
+    SHEET_LABEL_T       = 0x0800,
+    FIELD_T             = 0x1000,
+    EXCLUDE_ENDPOINTS_T = 0x2000,
+    ENDPOINTS_ONLY_T    = 0x4000,
+    NO_FILTER_T         = 0xFFFF
+};
+
+
 enum DANGLING_END_T {
     UNKNOWN = 0,
     WIRE_START_END,
@@ -223,17 +244,28 @@ public:
      */
     void ClearConnections() { m_connections.release(); }
 
+    /**
+     * Function IsConnected().
+     * Test \a aPosition to see if it is connected to this schematic object.
+     *
+     * @param aPosition - Position to test for connection.
+     * @return True if connection to \a aPosition exists.
+     */
+    bool IsConnected( const wxPoint& aPoint ) const;
+
     /**
      * Function HitTest().
      * Test if \a aPoint is contained within the bounding box or on an item.
      *
      * @param aPoint - Point to test.
      * @param aAccuracy - Increase the item bounding box by this amount.
-     * @return True if \aPoint is within the item.
+     * @param aFilter - Mask to provide more granular hit testing.  See enum SCH_FILTER_T.
+     * @return True if \aPoint is within the item and meets the filter criteria.
      */
-    bool HitTest( const wxPoint& aPoint, int aAccuracy = 0 ) const
+    bool HitTest( const wxPoint& aPoint, int aAccuracy = 0,
+                  SCH_FILTER_T aFilter = NO_FILTER_T ) const
     {
-        return DoHitTest( aPoint, aAccuracy );
+        return DoHitTest( aPoint, aAccuracy, aFilter );
     }
 
     /**
@@ -257,11 +289,17 @@ public:
      *         http://www.gotw.ca/publications/mill18.htm.
      */
 private:
-    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy ) const { return false; }
+    virtual bool DoHitTest( const wxPoint& aPoint, int aAccuracy, SCH_FILTER_T aFilter ) const
+    {
+        return false;
+    }
+
     virtual bool DoHitTest( const EDA_Rect& aRect, bool aContained, int aAccuracy ) const
     {
         return false;
     }
+
+    virtual bool DoIsConnected( const wxPoint& aPosition ) const { return false; }
 };
 
 #endif /* SCH_ITEM_STRUCT_H */