pcbnew test scale values when printing/ploting to avoid 0 scale or others stupid values

(scale now allowed from 0.01 to 100)

pcbnew/dialog_print_using_printer.cpp

@@ -26,12 +26,15 @@ static long   s_SelectedLayers;
 static double s_ScaleList[] =
 { 0, 0.5, 0.7, 0.999, 1.0, 1.4, 2.0, 3.0, 4.0 };
 
+// Define min et max reasonnable values for print scale
+#define MIN_SCALE 0.01
+#define MAX_SCALE 100.0
 
 // static print data and page setup data, to remember settings during the session
 static wxPrintData* g_PrintData;
 
 // Variables locales
-static int s_PrintPenMinWidth = 1;
+static int          s_PrintPenMinWidth = 50;    // A reasonnable value to draw items that do dot have aspecifed line width
 static int          s_PrintMaskLayer;
 static int          s_OptionPrintPage = 0;
 static int          s_Print_Black_and_White = TRUE;
@@ -189,6 +192,7 @@ void DIALOG_PRINT_USING_PRINTER::OnInitDialog( wxInitDialogEvent& event )
     m_Exclude_Edges_Pcb->Show( true );
 #endif
 
+    m_XScaleAdjust = m_YScaleAdjust = 1.0;      // Default value for scale
     // Read the scale adjust option
     if( m_Config )
     {
@@ -197,6 +201,10 @@ void DIALOG_PRINT_USING_PRINTER::OnInitDialog( wxInitDialogEvent& event )
         m_Config->Read( OPTKEY_PRINT_Y_FINESCALE_ADJ, &m_YScaleAdjust );
         m_Config->Read( OPTKEY_PRINT_SCALE, &s_Scale_Select );
 
+        // Test for a reasonnable scale value. Set to 1 if problem
+        if ( m_XScaleAdjust < MIN_SCALE || m_YScaleAdjust < MIN_SCALE || m_XScaleAdjust > MAX_SCALE || m_YScaleAdjust > MAX_SCALE )
+            m_XScaleAdjust = m_YScaleAdjust = 1.0;
+
         s_SelectedLayers = 0;
         for( int layer = 0;  layer<layer_max;  ++layer )
         {
@@ -611,6 +619,12 @@ void EDA_Printout::DrawPage()
     scaleY = (double) SheetSize.y / PlotAreaSize.y;
     scale  = wxMax( scaleX, scaleY ) / userscale; // Use x or y scaling factor, whichever fits on the DC
 
+    if ( m_PrintFrame->m_XScaleAdjust > MAX_SCALE || m_PrintFrame->m_YScaleAdjust > MAX_SCALE )
+        DisplayInfo(NULL, _("Warning: Scale option set to a very large value") );
+    // Test for a reasonnable scale value
+    if ( m_PrintFrame->m_XScaleAdjust < MIN_SCALE || m_PrintFrame->m_YScaleAdjust < MIN_SCALE )
+        DisplayInfo(NULL, _("Warning: Scale option set to a very small value") );
+
     // ajust the real draw scale
     double accurate_Xscale, accurate_Yscale;
     dc->SetUserScale( DrawZoom / scale * m_PrintFrame->m_XScaleAdjust,

pcbnew/pcbplot.cpp

@@ -23,6 +23,10 @@
 #define OPTKEY_ALWAYS_PRINT_PADS  wxT( "PlotAlwaysPads" )
 #define OPTKEY_OUTPUT_FORMAT      wxT( "PlotOutputFormat" )
 
+// Define min et max reasonnable values for print scale
+#define MIN_SCALE 0.01
+#define MAX_SCALE 100.0
+
 
 static long s_SelectedLayers = CUIVRE_LAYER | CMP_LAYER |
                                SILKSCREEN_LAYER_CMP | SILKSCREEN_LAYER_CU;
@@ -259,6 +263,10 @@ void WinEDA_PlotFrame::OnInitDialog( wxInitDialogEvent& event )
         config->Read( OPTKEY_YFINESCALE_ADJ, &m_YScaleAdjust );
     }
 
+    // Test for a reasonnable scale value. Set to 1 if problem
+    if ( m_XScaleAdjust < MIN_SCALE || m_YScaleAdjust < MIN_SCALE || m_XScaleAdjust > MAX_SCALE || m_YScaleAdjust > MAX_SCALE )
+        m_XScaleAdjust = m_YScaleAdjust = 1.0;
+
     m_FineAdjustXscaleOpt = new WinEDA_DFloatValueCtrl( this,
         _( "X scale adjust" ), m_XScaleAdjust,
         RightBoxSizer );
@@ -688,9 +696,9 @@ void WinEDA_PlotFrame::Plot( wxCommandEvent& event )
     }
 
     // Test for a reasonnable scale value
-    if ( Scale_X < 0.01 || Scale_Y < 0.01 )
+    if ( Scale_X < MIN_SCALE || Scale_Y < MIN_SCALE )
         DisplayInfo(this, _("Warning: Scale option set to a very small value") );
-    if ( Scale_X > 100.0 || Scale_Y > 100.0 )
+    if ( Scale_X > MAX_SCALE || Scale_Y > MAX_SCALE )
         DisplayInfo(this, _("Warning: Scale option set to a very large value") );
 
     int mask = 1;