import homebank-5.2.4

[chaz/homebank] / src / gtk-chart.c

diff --git a/src/gtk-chart.c b/src/gtk-chart.c
index fdd30babf644469d25608b3564ae60dc20d66578..0f6f1276bd44c0f3cebf76fec06a41c32f6dec10 100644 (file)
--- a/src/gtk-chart.c
+++ b/src/gtk-chart.c
@@ -1,5 +1,5 @@
 /*  HomeBank -- Free, easy, personal accounting for everyone.
- *  Copyright (C) 1995-2018 Maxime DOYEN
+ *  Copyright (C) 1995-2019 Maxime DOYEN
  *
  *  This file is part of HomeBank.
  *
@@ -27,6 +27,7 @@
 #include "gtk-chart-colors.h"
 #include "gtk-chart.h"
 
+
 #define MYDEBUG 0
 
 
@@ -908,6 +909,28 @@ int tw, th;
                }
        }
 
+       /* average */
+       if( chart->show_average )
+       {
+               if( chart->average < 0 )
+               {
+                       y  = 0.5 + chart->oy + (ABS(chart->average)/chart->range) * chart->graph.height;
+               }
+               else
+               {
+                       y  = 0.5 + chart->oy - (ABS(chart->average)/chart->range) * chart->graph.height;
+               }
+
+               DB( g_print(" draw average: x%d, y%f, w%d\n", chart->l, y, chart->w) );
+
+               cairo_user_set_rgbacol(cr, &global_colors[THTEXT], 1.0);
+               cairo_set_line_width(cr, 1.0);
+               cairo_set_dash (cr, dashed3, 1, 0);
+               cairo_move_to(cr, chart->graph.x, y);
+               cairo_line_to (cr, chart->graph.x + chart->graph.width, y);
+               cairo_stroke(cr);
+       }
+
        g_object_unref (layout);
        cairo_destroy(cr);
 }
@@ -1231,10 +1254,35 @@ gint first, i;
                x += chart->blkw;
        }
 
-/* overdrawn */
+       /* average */
+       
+       if( chart->show_average )
+       {
+               if( chart->average < 0 )
+               {
+                       y  = 0.5 + chart->oy + (ABS(chart->average)/chart->range) * chart->graph.height;
+               }
+               else
+               {
+                       y  = 0.5 + chart->oy - (ABS(chart->average)/chart->range) * chart->graph.height;
+               }
 
-       DB( g_print(" min=%.2f range=%.2f\n", chart->min, chart->range) );
+               y2 = (ABS(chart->min)/chart->range) * chart->graph.height - (y - chart->oy) + 1;
 
+               DB( g_print(" draw average: x%d, y%f, w%d, h%f\n", chart->l, y, chart->w, y2) );
+
+               cairo_user_set_rgbacol(cr, &global_colors[THTEXT], 1.0);
+               cairo_set_line_width(cr, 1.0);
+               cairo_set_dash (cr, dashed3, 1, 0);
+               cairo_move_to(cr, chart->graph.x, y);
+               cairo_line_to (cr, chart->graph.x + chart->graph.width, y);
+               cairo_stroke(cr);
+       }
+       
+
+       
+       /* overdrawn */
+       DB( g_print(" min=%.2f range=%.2f\n", chart->min, chart->range) );
 
        if( chart->show_over )
        {
@@ -2204,6 +2252,22 @@ void gtk_chart_show_xval(GtkChart * chart, gboolean visible)
        //      chart_recompute(chart);
 }
 
+
+void gtk_chart_show_average(GtkChart * chart, gdouble value, gboolean visible)
+{
+       g_return_if_fail (GTK_IS_CHART (chart));
+
+       DB( g_print("\n[gtkchart] set show average %f\n", value) );
+
+       chart->average = value;
+       chart->show_average = visible;
+       
+       //if(chart->type == CHART_TYPE_LINE)
+       //      chart_recompute(chart);
+}
+
+
+
 /*
 ** chnage the overdrawn visibility
 */