Add dragging of wire ends, corners and junctions.

Fixes: lp:1830007
* https://bugs.launchpad.net/kicad/+bug/1830007

eeschema/sch_line.cpp

@@ -601,6 +601,16 @@ void SCH_LINE::GetConnectionPoints( std::vector< wxPoint >& aPoints ) const
 }
 
 
+void SCH_LINE::GetSelectedPoints( std::vector< wxPoint >& aPoints ) const
+{
+    if( m_Flags & STARTPOINT )
+        aPoints.push_back( m_start );
+
+    if( m_Flags & ENDPOINT )
+        aPoints.push_back( m_end );
+}
+
+
 wxString SCH_LINE::GetSelectMenuText( EDA_UNITS_T aUnits ) const
 {
     wxString txtfmt, orient;

eeschema/sch_line.h

@@ -176,7 +176,9 @@ public:
 
     bool IsConnectable() const override;
 
-    void GetConnectionPoints(std::vector< wxPoint >& aPoints ) const override;
+    void GetConnectionPoints( std::vector< wxPoint >& aPoints ) const override;
+
+    void GetSelectedPoints( std::vector< wxPoint >& aPoints ) const;
 
     bool CanConnect( const SCH_ITEM* aItem ) const override;
 

eeschema/tools/ee_selection_tool.cpp

@@ -33,6 +33,7 @@
 #include <sch_component.h>
 #include <sch_sheet.h>
 #include <sch_field.h>
+#include <sch_line.h>
 #include <view/view.h>
 #include <view/view_controls.h>
 #include <view/view_group.h>
@@ -487,7 +488,7 @@ EDA_ITEM* EE_SELECTION_TOOL::SelectPoint( const VECTOR2I& aWhere, const KICAD_T*
 
     bool anyCollected = collector.GetCount() != 0;
 
-    // Remove unselectable items
+    // Post-process collected items
     for( int i = collector.GetCount() - 1; i >= 0; --i )
     {
         if( !selectable( collector[ i ] ) )
@@ -495,6 +496,20 @@ EDA_ITEM* EE_SELECTION_TOOL::SelectPoint( const VECTOR2I& aWhere, const KICAD_T*
 
         if( aCheckLocked && collector[ i ]->IsLocked() )
             collector.Remove( i );
+
+        // SelectPoint, unlike other selection routines, can select line ends
+        if( collector[ i ]->Type() == SCH_LINE_T )
+        {
+            SCH_LINE* line = (SCH_LINE*) collector[ i ];
+            line->ClearFlags( STARTPOINT | ENDPOINT );
+
+            if( HitTestPoints( line->GetStartPoint(), (wxPoint) aWhere, collector.m_Threshold ) )
+                line->SetFlags( STARTPOINT );
+            else if (HitTestPoints( line->GetEndPoint(), (wxPoint) aWhere, collector.m_Threshold ) )
+                line->SetFlags( ENDPOINT );
+            else
+                line->SetFlags( STARTPOINT | ENDPOINT );
+        }
     }
 
     m_selection.ClearReferencePoint();
@@ -580,6 +595,30 @@ void EE_SELECTION_TOOL::guessSelectionCandidates( EE_COLLECTOR& collector, const
         if( item->Type() == SCH_FIELD_T && other->Type() == SCH_COMPONENT_T )
             collector.Remove( other );
     }
+
+    // No need for multiple wires at a single point; if there's a junction select that;
+    // otherwise any of the wires will do
+    bool junction = false;
+    bool wiresOnly = true;
+
+    for( EDA_ITEM* item : collector )
+    {
+        if( item->Type() == SCH_JUNCTION_T )
+            junction = true;
+        else if( item->Type() != SCH_LINE_T )
+            wiresOnly = false;
+    }
+
+    if( wiresOnly )
+    {
+        for( int j = collector.GetCount() - 1; j >= 0; --j )
+        {
+            if( junction && collector[ j ]->Type() != SCH_JUNCTION_T )
+                collector.Remove( j );
+            else if( !junction && j > 0 )
+                collector.Remove( j );
+        }
+    }
 }
 
 

eeschema/tools/sch_move_tool.cpp

@@ -194,17 +194,16 @@ int SCH_MOVE_TOOL::Main( const TOOL_EVENT& aEvent )
         {
             if( !m_moveInProgress )    // Prepare to start moving/dragging
             {
-                bool appendUndo = selection.Front()->IsNew();
+                SCH_ITEM* sch_item = (SCH_ITEM*) selection.Front();
+                bool      appendUndo = sch_item->IsNew();
 
                 //------------------------------------------------------------------------
                 // Setup a drag or a move
                 //
                 for( SCH_ITEM* it = m_frame->GetScreen()->GetDrawItems(); it; it = it->Next() )
                 {
+                    if( !it->IsSelected() )
                         it->ClearFlags( STARTPOINT | ENDPOINT | SELECTEDNODE );
-
-                    if( it->IsSelected() )
-                        it->SetFlags( STARTPOINT | ENDPOINT );
                 }
 
                 if( m_isDragOperation )
@@ -216,6 +215,10 @@ int SCH_MOVE_TOOL::Main( const TOOL_EVENT& aEvent )
                         if( static_cast<SCH_ITEM*>( item )->IsConnectable() )
                         {
                             std::vector<wxPoint> connections;
+
+                            if( item->Type() == SCH_LINE_T )
+                                static_cast<SCH_LINE*>( item )->GetSelectedPoints( connections );
+                            else
                                 static_cast<SCH_ITEM*>( item )->GetConnectionPoints( connections );
 
                             for( wxPoint point : connections )
@@ -301,11 +304,14 @@ int SCH_MOVE_TOOL::Main( const TOOL_EVENT& aEvent )
                 }
                 // For some items, moving the cursor to anchor is not good (for instance large
                 // hierarchical sheets or components can have the anchor outside the view)
-                else if( selection.Size() == 1
+                else if( selection.Size() == 1 && sch_item->IsMovableFromAnchorPoint()
-                        && static_cast<SCH_ITEM*>( selection.Front() )->IsMovableFromAnchorPoint()
                          && m_frame->GetMoveWarpsCursor() )
                 {
-                    m_anchorPos = static_cast<SCH_ITEM*>( selection.Front() )->GetPosition();
+                    if( sch_item->Type() == SCH_LINE_T && !( sch_item->GetFlags() & STARTPOINT ) )
+                        m_anchorPos = static_cast<SCH_LINE*>( sch_item )->GetEndPoint();
+                    else
+                        m_anchorPos = sch_item->GetPosition();
+
                     getViewControls()->WarpCursor( *m_anchorPos );
                     m_cursor = *m_anchorPos;
                 }