[chronojump] Encoder analyze instant uses Cairo rectangle on CairoUtil

[Xavier de Blas <xaviblas src gnome org>]

commit e746199ddea139146d7d80aaf24e5493dc35c53d
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Feb 14 18:37:34 2020 +0100

    Encoder analyze instant uses Cairo rectangle on CairoUtil

 src/gui/app1/encoder.cs | 66 ++++++-------------------------------------------
 1 file changed, 7 insertions(+), 59 deletions(-)
---
diff --git a/src/gui/app1/encoder.cs b/src/gui/app1/encoder.cs
index eeeee3d7..27eeaccd 100644
--- a/src/gui/app1/encoder.cs
+++ b/src/gui/app1/encoder.cs
@@ -6536,65 +6536,13 @@ public partial class ChronoJumpWindow
                if(drawingarea_encoder_analyze_cairo_pixbuf == null)
                        return;
 
-               DrawingArea area = (DrawingArea) o;
-               using (Cairo.Context g = Gdk.CairoHelper.Create (area.GdkWindow)) 
-               {
-                       //add image
-                       Gdk.CairoHelper.SetSourcePixbuf (g, drawingarea_encoder_analyze_cairo_pixbuf, 0, 0);
-                       g.Paint();
-
-                       //add rectangle
-                       g.SetSourceRGBA(0.906, 0.745, 0.098, 1); //Chronojump yellow
-                       
-                       int xposa = 
eai.GetVerticalLinePosition(Convert.ToInt32(hscale_encoder_analyze_a.Value));
-                       encoderAnalyzeInstantVerticalLine(g, xposa);
-
-                       if(checkbutton_encoder_analyze_b.Active) {
-                               int xposb = 
eai.GetVerticalLinePosition(Convert.ToInt32(hscale_encoder_analyze_b.Value));
-
-                               if(xposb != xposa) {
-                                       //draw b vertical line
-                                       encoderAnalyzeInstantVerticalLine(g, xposb);
-
-                                       g.SetSourceRGBA(0.906, 0.745, 0.098, .5); //Chronojump yellow, half 
transp
-
-                                       //create rectangle
-                                       int min = Math.Min(xposa, xposb) +1;
-                                       int max = Math.Max(xposa, xposb) -1;
-                                       if(min < max)
-                                       {
-                                               g.Rectangle(min ,9 , max-min, 
drawingarea_encoder_analyze_cairo_pixbuf.Height -18);
-                                               g.Fill();
-                                       }
-                               }
-                       }
-                       
-                       g.Stroke();
-
-                       g.GetTarget ().Dispose ();
-               }
-       }
-
-       private void encoderAnalyzeInstantVerticalLine(Cairo.Context g, int x)
-       {
-               //vertical line
-               g.MoveTo(x, 9);
-               g.LineTo(x, drawingarea_encoder_analyze_cairo_pixbuf.Height);
-               g.Stroke();
-
-               //top triangle
-               g.MoveTo(x -4, 0);
-               g.LineTo(x   , 8);
-               g.LineTo(x +4, 0);
-               g.LineTo(x -4, 0);
-               g.Fill();
-
-               /*
-               //bottom triangle currently not drawn because bottom space changes and half of triangle is 
not shown
-               g.MoveTo(x -4, drawingarea_encoder_analyze_cairo_pixbuf.Height);
-               g.LineTo(x   , drawingarea_encoder_analyze_cairo_pixbuf.Height -8);
-               g.LineTo(x +4, drawingarea_encoder_analyze_cairo_pixbuf.Height);
-               */
+               if(eai != null)
+                       CairoUtil.PaintVerticalLinesAndRectangleOnSurface (
+                                       (DrawingArea) o,
+                                       
eai.GetVerticalLinePosition(Convert.ToInt32(hscale_encoder_analyze_a.Value)),
+                                       
eai.GetVerticalLinePosition(Convert.ToInt32(hscale_encoder_analyze_b.Value)),
+                                       checkbutton_encoder_analyze_b.Active,
+                                       drawingarea_encoder_analyze_cairo_pixbuf);
        }
 
        // -------------- end of drawingarea_encoder_analyze_instant