bugfix: pad enumerator skips pads if mouse cursor is moved too fast (GAL module editor).

pcbnew/tools/module_tools.cpp

 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2014 CERN
+ * Copyright (C) 2014-2015 CERN
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
  * This program is free software; you can redistribute it and/or
@@ -195,7 +195,7 @@ int MODULE_TOOLS::EnumeratePads( const TOOL_EVENT& aEvent )
     guide.SetIgnoreModulesVals( true );
     guide.SetIgnoreModulesRefs( true );
 
-    // Create a set containing all pads (to avoid double adding to a list)
+    // Create a set containing all pads (to avoid double adding to the list)
     for( D_PAD* p = module->Pads(); p; p = p->Next() )
         allPads.insert( p );
 
@@ -217,23 +217,56 @@ int MODULE_TOOLS::EnumeratePads( const TOOL_EVENT& aEvent )
 
     m_toolMgr->RunAction( COMMON_ACTIONS::selectionClear, true );
     m_controls->ShowCursor( true );
+    VECTOR2I oldCursorPos = m_controls->GetCursorPosition();
+    std::list<D_PAD*> selectedPads;
 
     while( OPT_TOOL_EVENT evt = Wait() )
     {
         if( evt->IsDrag( BUT_LEFT ) || evt->IsClick( BUT_LEFT ) )
         {
-            // Add pads to the list according to the selection order
+            selectedPads.clear();
             VECTOR2I cursorPos = m_controls->GetCursorPosition();
 
+            if( evt->IsClick( BUT_LEFT ) )
+            {
+                oldCursorPos = m_controls->GetCursorPosition();
                 collector.Empty();
                 collector.Collect( m_board, types, wxPoint( cursorPos.x, cursorPos.y ), guide );
 
                 for( int i = 0; i < collector.GetCount(); ++i )
                 {
                     if( collector[i]->Type() == PCB_PAD_T )
+                        selectedPads.push_back( static_cast<D_PAD*>( collector[i] ) );
+                }
+            }
+            else //evt->IsDrag( BUT_LEFT )
+            {
+                // wxWidgets deliver mouse move events not frequently enough, resulting in skipping
+                // pads if the user moves cursor too fast. To solve it, create a line that approximates
+                // the mouse move and select items intersecting with the line.
+                int distance = ( cursorPos - oldCursorPos ).EuclideanNorm();
+                int segments = distance / 100000 + 1;
+                const wxPoint LINE_STEP( ( cursorPos - oldCursorPos ).x / segments,
+                                         ( cursorPos - oldCursorPos ).y / segments );
+
+                collector.Empty();
+                for( int j = 0; j < segments; ++j ) {
+                    collector.Collect( m_board, types,
+                                       wxPoint( oldCursorPos.x, oldCursorPos.y ) + j * LINE_STEP,
+                                       guide );
+
+                    for( int i = 0; i < collector.GetCount(); ++i )
                     {
-                    D_PAD* pad = static_cast<D_PAD*>( collector[i] );
+                        if( collector[i]->Type() == PCB_PAD_T )
+                            selectedPads.push_back( static_cast<D_PAD*>( collector[i] ) );
+                    }
+                }
+
+                selectedPads.unique();
+            }
 
+            BOOST_FOREACH( D_PAD* pad, selectedPads )
+            {
                 std::set<D_PAD*>::iterator it = allPads.find( pad );
 
                 // Add the pad to the list, if it was not selected previously..
@@ -252,7 +285,8 @@ int MODULE_TOOLS::EnumeratePads( const TOOL_EVENT& aEvent )
                     pad->ClearSelected();
                 }
             }
-            }
+
+            oldCursorPos = cursorPos;
         }
 
         else if( ( evt->IsKeyPressed() && evt->KeyCode() == WXK_RETURN ) ||