Fix - limit th2 text output size

Author: linev

changes.md

@@ -4,6 +4,7 @@
 1. Fix - position of TFrame in canvas/pad
 2. Fix - use histogram fMinimum/fMaximum when creating color palette
 3. Fix - correctly draw empty th2 bins when zmin<0 is specified  
+4. Fix - limit th2 text output size 
 
 
 ## Changes in 4.5.1

scripts/JSRootPainter.js

@@ -2253,7 +2253,7 @@
       // options
    }
 
-   JSROOT.TObjectPainter.prototype.StartTextDrawing = function(font_face, font_size, draw_g) {
+   JSROOT.TObjectPainter.prototype.StartTextDrawing = function(font_face, font_size, draw_g, max_font_size) {
       // we need to preserve font to be able rescle at the end
 
       if (!draw_g) draw_g = this.draw_g;
@@ -2266,6 +2266,7 @@
       draw_g.property('mathjax_use', false);
       draw_g.property('text_factor', 0.);
       draw_g.property('max_text_width', 0); // keep maximal text width, use it later
+      draw_g.property('max_font_size', max_font_size);
    }
 
    JSROOT.TObjectPainter.prototype.TextScaleFactor = function(value, draw_g) {
@@ -2326,6 +2327,8 @@
       if ((f>0) && ((f<0.9) || (f>1.))) {
          var font = draw_g.property('text_font');
          font.size = Math.floor(font.size/f);
+         if (draw_g.property('max_font_size') && (font.size>draw_g.property('max_font_size')))
+            font.size = draw_g.property('max_font_size');
          draw_g.call(font.func);
       }
 

scripts/JSRootPainter.more.js

@@ -3475,7 +3475,7 @@
                        .append("svg:g")
                        .attr("class","th2_text");
 
-      this.StartTextDrawing(42, 20, text_g);
+      this.StartTextDrawing(42, 20, text_g, 20);
 
       for (i = handle.i1; i < handle.i2; ++i)
          for (j = handle.j1; j < handle.j2; ++j) {