Uses a buffered DC in OnPaint event. Seems solve slow grid redraw on some PC.

CHANGELOG.txt

@@ -4,6 +4,14 @@ KiCad ChangeLog 2009
 Please add newer entries at the top, list the date and your name with
 email address.
 
+2010-Jan-12 UPDATE Jean-Pierre Charras <jean-pierre.charras@gipsa-lab.inpg.fr>
+================================================================================
+++All
+    Use wxAutoBufferedPaintDC in OnPaint event
+    Seems solves slow grid redraw on some PC (tested under Window 7)
+    and is faster than use wxPaintDC, not buffered
+    (note MACOSX has natively a double buffer, so no change for MACOSX)
+
 2010-Jan-08 UPDATE Jean-Pierre Charras <jean-pierre.charras@gipsa-lab.inpg.fr>
 ================================================================================
 ++Gerbview

CMakeLists.txt

@@ -139,7 +139,8 @@ check_find_package_result(OPENGL_FOUND "OpenGL")
 # http://www.wxwidgets.org/manuals/2.8/wx_librarieslist.html
 
 if( KICAD_AUIMANAGER OR KICAD_AUITOOLBAR )
-    find_package(wxWidgets COMPONENTS gl html adv core net base aui QUIET)
+#    find_package(wxWidgets COMPONENTS gl html adv core net base aui QUIET)
+    find_package(wxWidgets COMPONENTS gl html adv core net base QUIET)
 else( KICAD_AUIMANAGER OR KICAD_AUITOOLBAR )
     find_package(wxWidgets COMPONENTS gl html adv core net base QUIET)
 endif( KICAD_AUIMANAGER OR KICAD_AUITOOLBAR )

common/drawpanel.cpp

@@ -421,12 +421,6 @@ void WinEDA_DrawPanel::OnActivate( wxActivateEvent& event )
 }
 
 
-void WinEDA_DrawPanel::OnEraseBackground( wxEraseEvent& event )
-{
-    event.Skip();
-}
-
-
 void WinEDA_DrawPanel::OnScroll( wxScrollWinEvent& event )
 {
     int id = event.GetEventType();

common/zoom.cpp

@@ -15,8 +15,6 @@
 #include "class_base_screen.h"
 #include "wxstruct.h"
 
-#include "kicad_device_context.h"
-
 /** Compute draw offset (scroll bars and draw parameters)
  *  in order to have the current graphic cursor position at the screen center
  *  @param ToMouse if TRUE, the mouse cursor is moved
@@ -28,8 +26,8 @@ void WinEDA_DrawFrame::Recadre_Trace( bool ToMouse )
 {
     PutOnGrid( &(GetBaseScreen()->m_Curseur) );
     AdjustScrollBars();
-    INSTALL_DC( dc, DrawPanel ) ;
-    DrawPanel->ReDraw( &dc );
+    DrawPanel->Refresh();   // send OnPaint event
+    wxSafeYield();          // needed to allow OnPaint event execution here
 
     /* Move the mouse cursor to the on grid graphic cursor position */
     if( ToMouse == TRUE )
@@ -40,8 +38,8 @@ void WinEDA_DrawFrame::Recadre_Trace( bool ToMouse )
 
 
 /** Adjust the coordinate to the nearest grid value
-* @param coord = coordinate to adjust
-*/
+ * @param coord = coordinate to adjust
+ */
 void WinEDA_DrawFrame::PutOnGrid( wxPoint* coord )
 {
     wxRealPoint grid_size = GetBaseScreen()->GetGridSize();
@@ -52,7 +50,7 @@ void WinEDA_DrawFrame::PutOnGrid( wxPoint* coord )
         coord->x = wxRound( tmp * grid_size.x );
 
         tmp = wxRound( coord->y / grid_size.y );
-        coord->y = wxRound ( tmp * grid_size.y );
+        coord->y = wxRound( tmp * grid_size.y );
     }
 }
 
@@ -79,9 +77,10 @@ void WinEDA_DrawFrame::Window_Zoom( EDA_Rect& Rect )
     /* Compute the best zoom */
     Rect.Normalize();
     size = DrawPanel->GetClientSize();
+
     // Use ceil to at least show the full rect
     scalex    = (double) Rect.GetSize().x / size.x;
-    bestscale       = (double)Rect.GetSize().y / size.y;
+    bestscale = (double) Rect.GetSize().y / size.y;
     bestscale = MAX( bestscale, scalex );
 
     GetBaseScreen()->SetScalingFactor( bestscale );
@@ -107,6 +106,7 @@ void WinEDA_DrawFrame::OnZoom( wxCommandEvent& event )
     {
     case ID_POPUP_ZOOM_IN:
         zoom_at_cursor = true;
+
     // fall thru
 
     case ID_ZOOM_IN:
@@ -118,6 +118,7 @@ void WinEDA_DrawFrame::OnZoom( wxCommandEvent& event )
 
     case ID_POPUP_ZOOM_OUT:
         zoom_at_cursor = true;
+
     // fall thru
 
     case ID_ZOOM_OUT:
@@ -128,12 +129,7 @@ void WinEDA_DrawFrame::OnZoom( wxCommandEvent& event )
         break;
 
     case ID_ZOOM_REDRAW:
-        // DrawPanel->Refresh(); usually good,
-        // but does not work under linux, when called from here (wxGTK bug ?)
-        {
-        INSTALL_DC( dc, DrawPanel );
-        DrawPanel->ReDraw( &dc );
-        }
+        DrawPanel->Refresh();
         break;
 
     case ID_POPUP_ZOOM_CENTER:
@@ -204,7 +200,7 @@ void WinEDA_DrawPanel::AddMenuZoom( wxMenu* MasterMenu )
     /* Populate zoom submenu. */
     for( i = 0; i < (size_t) maxZoomIds; i++ )
     {
-        if ( ( GetScreen()->m_ZoomList[i] % GetScreen()->m_ZoomScalar ) == 0 )
+        if( ( GetScreen()->m_ZoomList[i] % GetScreen()->m_ZoomScalar ) == 0 )
             msg.Printf( wxT( "%u" ),
                         GetScreen()->m_ZoomList[i] / GetScreen()->m_ZoomScalar );
         else
@@ -240,7 +236,7 @@ void WinEDA_DrawPanel::AddMenuZoom( wxMenu* MasterMenu )
             }
             else
             {
-                if ( g_UnitMetric == 0 )    // inches
+                if( g_UnitMetric == 0 )     // inches
                     msg.Printf( wxT( "%.1f mils" ), gridValue * 1000 );
                 else
                     msg.Printf( wxT( "%.3f mm" ), gridValue );

include/class_drawpanel.h

@@ -99,7 +99,6 @@ public:
                             void* aData );
     void         DrawBackGround( wxDC* DC );
     void         DrawAuxiliaryAxis( wxDC* DC, int drawmode );
-    void         OnEraseBackground( wxEraseEvent& event );
     void         OnActivate( wxActivateEvent& event );
 
     /* Mouse and keys events */

include/kicad_device_context.h

@@ -10,8 +10,15 @@
 // and uncomment to use buffered DC
 // #define KICAD_USE_BUFFERED_DC    // Currently under test
 
-#ifdef KICAD_USE_BUFFERED_DC
-#include <wx/dcbuffer.h>
+// Comment this line to use the standard wxPaintDC
+// and uncomment to use buffered PaintDC
+#define KICAD_USE_BUFFERED_PAINTDC    // Currently under test
+
+#if defined KICAD_USE_BUFFERED_DC || defined KICAD_USE_BUFFERED_PAINTDC
+    #ifndef KICAD_USE_BUFFERED_PAINTDC
+    #define KICAD_USE_BUFFERED_PAINTDC
+    #endif
+    #include <wx/dcbuffer.h>
 #endif
 
 // Helper class to handle the client Device Context
@@ -27,14 +34,16 @@ public:
 #ifdef KICAD_USE_BUFFERED_DC
 
 #define INSTALL_DC(name,parent) \
-KicadGraphicContext _cDC( parent );\
-wxBufferedDC name(&_cDC, _cDC.GetSize() );
-
-#define INSTALL_PAINTDC(name,parent) wxBufferedPaintDC name(parent )
+    KicadGraphicContext _cDC( parent );\
+    wxBufferedDC name(&_cDC, _cDC.GetSize() );
+#else
+    #define INSTALL_DC(name,parent) KicadGraphicContext name( parent )
+#endif
 
+#ifdef KICAD_USE_BUFFERED_PAINTDC
+    #define INSTALL_PAINTDC(name,parent) wxAutoBufferedPaintDC name(parent )
 #else
-#define INSTALL_DC(name,parent) KicadGraphicContext name( parent )
-#define INSTALL_PAINTDC(name,parent) wxPaintDC name( parent )
+    #define INSTALL_PAINTDC(name,parent) wxPaintDC name( parent )
 #endif
 
 #endif // __KICAD_DEVICE_CONTEXT_H__

pcbnew/class_zone.cpp

@@ -318,7 +318,7 @@ int ZONE_CONTAINER::ReadDescr( FILE* aFile, int* aLineNum )
         else if( strnicmp( Line, "ZOptions", 8 ) == 0 )    // Options info found
         {
             int  fillmode = 1;
-            int  arcsegmentcount = 16;
+            int  arcsegmentcount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;
             char fillstate = 'F';
             text = Line + 8;
             ret  = sscanf( text, "%d %d %c %d %d", &fillmode, &arcsegmentcount, &fillstate,
@@ -329,8 +329,8 @@ int ZONE_CONTAINER::ReadDescr( FILE* aFile, int* aLineNum )
             else
                 m_FillMode = fillmode ? 1 : 0;
 
-            if( arcsegmentcount >= 32 )
-                m_ArcToSegmentsCount = 32;
+            if( arcsegmentcount >= ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF )
+                m_ArcToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF;
 
             m_IsFilled = fillstate == 'F' ? true : false;
         }

pcbnew/class_zone.h

@@ -42,7 +42,8 @@ public:
     int                   m_ZoneClearance;                  // clearance value
     int                   m_ZoneMinThickness;               // Min thickness value in filled areas
     int                   m_FillMode;                       // How to fillingareas: 0 = use polygonal areas , != 0 fill with segments
-    int                   m_ArcToSegmentsCount;             // number of segments to convert a circle to a polygon (uses 16 or 32)
+    int                   m_ArcToSegmentsCount;             // number of segments to convert a circle to a polygon
+                                                            // (uses ARC_APPROX_SEGMENTS_COUNT_LOW_DEF or ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF)
     int                   m_PadOption;                      //
     int                   m_ThermalReliefGapValue;          // tickness of the gap in thermal reliefs
     int                   m_ThermalReliefCopperBridgeValue; // tickness of the copper bridge in thermal reliefs

pcbnew/class_zone_setting.cpp

@@ -30,8 +30,9 @@ ZONE_SETTING::ZONE_SETTING( void )
     m_NetcodeSelection   = 0;                                       // Net code selection for the current zone
     m_CurrentZone_Layer  = 0;                                       // Layer used to create the current zone
     m_Zone_HatchingStyle = CPolyLine::DIAGONAL_EDGE;                // Option to show the zone area (outlines only, short hatches or full hatches
-    m_ArcToSegmentsCount = 16;                  /* Option to select number of segments to approximate a circle
-                                                 * 16 or 32 segments */
+    m_ArcToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;      /* Option to select number of segments to approximate a circle
+                                                                    * ARC_APPROX_SEGMENTS_COUNT_LOW_DEF
+                                                                    * or ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF segments */
     m_ThermalReliefGapValue = 200;                                  // tickness of the gap in thermal reliefs
     m_ThermalReliefCopperBridgeValue = 200;                         // tickness of the copper bridge in thermal reliefs
 

pcbnew/dialog_copper_zones.cpp

@@ -124,7 +124,8 @@ void dialog_copper_zone::OnInitDialog( wxInitDialogEvent& event )
         break;
     }
 
-    m_ArcApproximationOpt->SetSelection( m_Zone_Setting->m_ArcToSegmentsCount == 32 ? 1 : 0 );
+    m_ArcApproximationOpt->SetSelection(
+        m_Zone_Setting->m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF ? 1 : 0 );
 
     /* build copper layers list */
     int layer_cnt = board->GetCopperLayerCount();
@@ -253,7 +254,9 @@ bool dialog_copper_zone::AcceptOptions( bool aPromptForErrors, bool aUseExportab
         break;
     }
 
-    m_Zone_Setting->m_ArcToSegmentsCount = m_ArcApproximationOpt->GetSelection() == 1 ? 32 : 16;
+    m_Zone_Setting->m_ArcToSegmentsCount = m_ArcApproximationOpt->GetSelection() == 1 ?
+                                           ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF :
+                                           ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;
 
     if( m_Config )
     {
@@ -437,6 +440,7 @@ void dialog_copper_zone::ExportSetupToOtherCopperZones( wxCommandEvent& event )
         m_Zone_Setting->ExportSetting( *zone, false );  // false = partiel export
         m_Parent->GetScreen()->SetModify();
     }
+
     m_OnExitCode = ZONE_EXPORT_VALUES;     // values are exported to others zones
 }
 

pcbnew/pcbnew.h

@@ -10,6 +10,10 @@
 
 #define U_PCB (PCB_INTERNAL_UNIT / EESCHEMA_INTERNAL_UNIT)
 
+// Arcs are appromed by segments: define the number of segments per 360 deg (kicad use 0.1 deg approx:
+#define ARC_APPROX_SEGMENTS_COUNT_LOW_DEF 16        // be aware 3600/ARC_APPROX_SEGMENTS_COUNT_LOW_DEF is an integer
+#define ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF 32
+
 /* Flag used in locate functions
  * the locate ref point is the on grid cursor or the off grid mouse cursor */
 #define CURSEUR_ON_GRILLE  (0 << 0)

pcbnew/zones_convert_brd_items_to_polygons.cpp

@@ -75,8 +75,9 @@ void AddRoundedEndsSegmentPolygon( Bool_Engine* aBooleng,
 
 // Local Variables:
 /* how many segments are used to create a polygon from a circle: */
-static int s_CircleToSegmentsCount = 16;   /* default value. the real value will be changed to 32
-                                            * if g_Zone_Arc_Approximation == 1
+static int s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;   /* default value. the real value will be changed to
+                                                                           * ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF
+                                                                           * if m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF
                                                                            */
 double     s_Correction; /* mult coeff used to enlarge rounded and oval pads (and vias)
                           * because the segment approximation for arcs and circles
@@ -129,10 +130,10 @@ void ZONE_CONTAINER::AddClearanceAreasPolygonsToPolysList( BOARD* aPcb )
     bool have_poly_to_substract = false;
 
     // Set the number of segments in arc approximations
-    if( m_ArcToSegmentsCount == 32  )
-        s_CircleToSegmentsCount = 32;
+    if( m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF  )
+        s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF;
     else
-        s_CircleToSegmentsCount = 16;
+        s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;
 
     /* calculates the coeff to compensate radius reduction of holes clearance
      * due to the segment approx.