Hide temporarily ratsnest when it is too complex for real-time calculation

pcbnew/connectivity.cpp

@@ -275,7 +275,12 @@ void CONNECTIVITY_DATA::ComputeDynamicRatsnest( const std::vector<BOARD_ITEM*>&
 void CONNECTIVITY_DATA::ClearDynamicRatsnest()
 {
     m_connAlgo->ForEachAnchor( [] (CN_ANCHOR_PTR anchor ) { anchor->SetNoLine( false ); } );
+    HideDynamicRatsnest();
+}
 
+
+void CONNECTIVITY_DATA::HideDynamicRatsnest()
+{
     m_dynamicConnectivity.reset();
     m_dynamicRatsnest.clear();
 }

pcbnew/connectivity.h

@@ -164,11 +164,16 @@ public:
 
     /**
      * Function ClearDynamicRatsnest()
-     * Erases the temporary dynamic ratsnest (i.e. the ratsnest lines that)
-     * pcbnew displays when moving an item/set of items
+     * Erases the temporary dynamic ratsnest (i.e. the ratsnest lines that
+     * pcbnew displays when moving an item/set of items)
      */
     void ClearDynamicRatsnest();
 
+    /**
+     * Hides the temporary dynamic ratsnest lines.
+     */
+    void HideDynamicRatsnest();
+
     /**
      * Function ComputeDynamicRatsnest()
      * Calculates the temporary dynamic ratsnest (i.e. the ratsnest lines that)

pcbnew/pcb_draw_panel_gal.cpp

@@ -375,6 +375,13 @@ bool PCB_DRAW_PANEL_GAL::SwitchBackend( GAL_TYPE aGalType )
 }
 
 
+void PCB_DRAW_PANEL_GAL::RedrawRatsnest()
+{
+    if( m_ratsnest )
+        m_view->Update( m_ratsnest.get() );
+}
+
+
 void PCB_DRAW_PANEL_GAL::setDefaultLayerDeps()
 {
     // caching makes no sense for Cairo and other software renderers

pcbnew/pcb_draw_panel_gal.h

@@ -99,6 +99,9 @@ public:
 
     bool SwitchBackend( GAL_TYPE aGalType ) override;
 
+    ///> Forces refresh of the ratsnest visual representation
+    void RedrawRatsnest();
+
 protected:
     ///> Reassigns layer order to the initial settings.
     void setDefaultLayerOrder();

pcbnew/tools/pcb_editor_control.cpp

@@ -39,7 +39,7 @@
 #include <wxPcbStruct.h>
 #include <class_board.h>
 #include <class_zone.h>
-#include <class_draw_panel_gal.h>
+#include <pcb_draw_panel_gal.h>
 #include <class_module.h>
 #include <class_mire.h>
 #include <connectivity.h>
@@ -53,6 +53,7 @@
 #include <view/view_group.h>
 #include <view/view_controls.h>
 #include <origin_viewitem.h>
+#include <profile.h>
 
 #include <tools/tool_event_utils.h>
 
@@ -239,6 +240,7 @@ PCB_EDITOR_CONTROL::PCB_EDITOR_CONTROL() :
     m_placeOrigin.reset( new KIGFX::ORIGIN_VIEWITEM( KIGFX::COLOR4D( 0.8, 0.0, 0.0, 1.0 ),
                                                 KIGFX::ORIGIN_VIEWITEM::CIRCLE_CROSS ) );
     m_probingSchToPcb = false;
+    m_slowRatsnest = false;
 }
 
 
@@ -309,6 +311,10 @@ bool PCB_EDITOR_CONTROL::Init()
         menu.AddMenu( zoneMenu.get(), false, toolActiveFunctor( DRAWING_TOOL::MODE::ZONE ) );
     }
 
+    m_ratsnestTimer.SetOwner( this );
+    Connect( m_ratsnestTimer.GetId(), wxEVT_TIMER,
+            wxTimerEventHandler( PCB_EDITOR_CONTROL::ratsnestTimer ), NULL, this );
+
     return true;
 }
 
@@ -1138,21 +1144,32 @@ int PCB_EDITOR_CONTROL::UpdateSelectionRatsnest( const TOOL_EVENT& aEvent )
 {
     auto selectionTool = m_toolMgr->GetTool<SELECTION_TOOL>();
     auto& selection = selectionTool->GetSelection();
+    auto connectivity = getModel<BOARD>()->GetConnectivity();
 
     if( selection.Empty() )
     {
-        getModel<BOARD>()->GetConnectivity()->ClearDynamicRatsnest();
+        connectivity->ClearDynamicRatsnest();
+    }
+    else if( m_slowRatsnest )
+    {
+        // Compute ratsnest only when user stops dragging for a moment
+        connectivity->HideDynamicRatsnest();
+        m_ratsnestTimer.Start( 40 );
     }
     else
     {
-        auto connectivity = getModel<BOARD>()->GetConnectivity();
-        std::vector<BOARD_ITEM*> items;
-        items.reserve( selection.Size() );
+        // Check how much time doest it take to calculate ratsnest
+        PROF_COUNTER counter;
+        calculateSelectionRatsnest();
+        counter.Stop();
 
-        for( auto item : selection )
-            items.push_back( static_cast<BOARD_ITEM*>( item ) );
-
-        connectivity->ComputeDynamicRatsnest( items );
+        // If it is too slow, then switch to 'slow ratsnest' mode when
+        // ratsnest is calculated when user stops dragging items for a moment
+        if( counter.msecs() > 10 )
+        {
+            m_slowRatsnest = true;
+            connectivity->HideDynamicRatsnest();
+        }
     }
 
     return 0;
@@ -1162,11 +1179,35 @@ int PCB_EDITOR_CONTROL::UpdateSelectionRatsnest( const TOOL_EVENT& aEvent )
 int PCB_EDITOR_CONTROL::HideSelectionRatsnest( const TOOL_EVENT& aEvent )
 {
     getModel<BOARD>()->GetConnectivity()->ClearDynamicRatsnest();
-
+    m_slowRatsnest = false;
     return 0;
 }
 
 
+void PCB_EDITOR_CONTROL::ratsnestTimer( wxTimerEvent& aEvent )
+{
+    m_ratsnestTimer.Stop();
+    calculateSelectionRatsnest();
+    static_cast<PCB_DRAW_PANEL_GAL*>( m_frame->GetGalCanvas() )->RedrawRatsnest();
+    m_frame->GetGalCanvas()->Refresh();
+}
+
+
+void PCB_EDITOR_CONTROL::calculateSelectionRatsnest()
+{
+    auto selectionTool = m_toolMgr->GetTool<SELECTION_TOOL>();
+    auto& selection = selectionTool->GetSelection();
+    auto connectivity = getModel<BOARD>()->GetConnectivity();
+    std::vector<BOARD_ITEM*> items;
+    items.reserve( selection.Size() );
+
+    for( auto item : selection )
+        items.push_back( static_cast<BOARD_ITEM*>( item ) );
+
+    connectivity->ComputeDynamicRatsnest( items );
+}
+
+
 void PCB_EDITOR_CONTROL::setTransitions()
 {
     // Track & via size control

pcbnew/tools/pcb_editor_control.h

@@ -38,7 +38,7 @@ class PCB_EDIT_FRAME;
  *
  * Handles actions specific to the board editor in pcbnew.
  */
-class PCB_EDITOR_CONTROL : public PCB_TOOL
+class PCB_EDITOR_CONTROL : public wxEvtHandler, public PCB_TOOL
 {
 public:
     PCB_EDITOR_CONTROL();
@@ -111,10 +111,16 @@ public:
     ///> Shows local ratsnest of a component
     int ShowLocalRatsnest( const TOOL_EVENT& aEvent );
 
+private:
+    ///> Event handler to recalculate dynamic ratsnest
+    void ratsnestTimer( wxTimerEvent& aEvent );
+
+    ///> Recalculates dynamic ratsnest for the current selection
+    void calculateSelectionRatsnest();
+
     ///> Sets up handlers for various events.
     void setTransitions() override;
 
-private:
     ///> Pointer to the currently used edit frame.
     PCB_EDIT_FRAME* m_frame;
 
@@ -124,6 +130,12 @@ private:
     ///> Flag to ignore a single crossprobe message from eeschema.
     bool m_probingSchToPcb;
 
+    ///> Flag to indicate whether the current selection ratsnest is slow to calculate.
+    bool m_slowRatsnest;
+
+    ///> Timer that start ratsnest calculation when it is slow to compute.
+    wxTimer m_ratsnestTimer;
+
     ///> How to modify a property for selected items.
     enum MODIFY_MODE { ON, OFF, TOGGLE };