Mv/color blocks

• Add a color field per block or cblk
• Refresh the window only if necessary
• Add a parser for symbol matrix file version -1 that contains

plugins/MatrixVisualizer/Common/Zooming.cpp

 #include <assert.h>
+#include <math.h>
 #include "Zooming.hpp"
 
 #include "../Helper.hpp"
@@ -91,10 +92,10 @@ void Zooming::move(double xStart, double xEnd, double yStart, double yEnd)
         int lbloknum = cblk[1].m_bloknum;
 
         // Get first block size in col from x to xEnd
-        int x    = (cblk->m_fcolnum - startCol) * xCoeff;
-        int xEnd = (cblk->m_lcolnum - startCol) * xCoeff;
+        int x    = (cblk->m_fcolnum     - startCol) * xCoeff;
+        int xEnd = (cblk->m_lcolnum + 1 - startCol) * xCoeff;
 
-        xEnd = ( xEnd > x+1 ) ? xEnd : x+1;
+        float cblk_color = cblk->m_color;
 
         blok = m_matrix->m_bloktab + fbloknum;
         for (j = fbloknum; j < lbloknum; ++j, blok++)
@@ -106,16 +107,16 @@ void Zooming::move(double xStart, double xEnd, double yStart, double yEnd)
             }
 
             // Get first block size in row from y to yEnd
-            int y    = (blok->m_frownum - startRow) * yCoeff;
-            int yEnd = (blok->m_lrownum - startRow) * yCoeff;
+            int y    = (blok->m_frownum     - startRow) * yCoeff;
+            int yEnd = (blok->m_lrownum + 1 - startRow) * yCoeff;
 
-            yEnd = ( yEnd > y+1 ) ? yEnd : y+1;
+            float color = blok->m_color == -1. ? cblk_color : blok->m_color;
 
             for( m=x; m<xEnd; m++ )
             {
                 for( n=y; n<yEnd; n++ )
                 {
-                    m_colors[m][n] = 0.0f;
+                    m_colors[m][n] = color;
                 }
             }
         }