Assign masking color to wxCONTOUR_BG, apply masking color to heat map

tab nonfinite values

Author: mjprilliman

include/wex/plot/plcolourmap.h

@@ -41,6 +41,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "wex/plot/plplot.h"
 
+#define wxCONTOUR_BG  wxStockGDI::GetColour(wxStockGDI::COLOUR_LIGHTGREY)
+
 class wxPLColourMap : public wxPLSideWidgetBase {
 public:
     wxPLColourMap(double min = 0, double max = 1);

src/plot/plcolourmap.cpp

@@ -159,7 +159,7 @@ void wxPLColourMap::Render(wxPLOutputDevice &dc, const wxPLRealRect &geom) {
 }
 
 wxColour wxPLColourMap::ColourForValue(double val) {
-    if (m_colourList.size() == 0 || !(wxFinite(val))) return *wxBLACK;
+    if (m_colourList.size() == 0 || !(wxFinite(val))) return *wxCONTOUR_BG;
 
     int position =
             (int) (((double) m_colourList.size()) * (

src/plot/plcontourplot.cpp

@@ -262,7 +262,7 @@ void wxPLContourPlot::Draw(wxPLOutputDevice &dc, const wxPLDeviceMapping &map) {
         // background set to min
         // assume RebuildMask has been called
         //wxColor bgc(m_cmap->ColourForValue(m_zMin));
-        wxColor bgc(*wxLIGHT_GREY);
+        wxColor bgc(*wxCONTOUR_BG);
         dc.Brush(bgc);
         wxRealPoint pos, size;
         map.GetDeviceExtents(&pos, &size);