* graphwidget.c: fixed a bug where we'd divide by 0 if min and max x and y were the...

[scdataviz] / graph.h

diff --git a/graph.h b/graph.h
index e140057..31d441f 100644 (file)
--- a/graph.h
+++ b/graph.h
@@ -42,6 +42,7 @@ struct graph_line {
   /*First point*/
   double p0_x;
   double p0_y;
+  /*Control pts*/
   double p1_x;
   double p1_y;
   double p2_x;
@@ -51,6 +52,15 @@ struct graph_line {
   double p3_y;
 };
 
+struct graph_axis {
+  double major_start;
+  double major_step;
+  int major;
+  int minor;
+  int subminor;
+  GString *title;
+};
+
 typedef struct _Graph {
   GObject parent_instance;
   /*Array of n_points sets of x,y coords*/
@@ -62,6 +72,8 @@ typedef struct _Graph {
   double maxy;
   double miny;
   graph_symbol symbol;
+  struct graph_axis *xaxis;
+  struct graph_axis *yaxis;
 } Graph;
 
 typedef struct _GraphClass {
@@ -79,6 +91,17 @@ Graph *graph_new(void);
 int graph_add_point(Graph* graph, double x, double y, const GString *label);
 int graph_add_graph_point(Graph* graph, struct graph_point *pt);
 int graph_add_line(Graph* graph, double p0_x, double p0_y, double p1_x, double p1_y, double p2_x, double p2_y, double p3_x, double p3_y);
+int graph_add_graph_line(Graph* graph, struct graph_line *l);
 void graph_add_linear_connectors(Graph* graph);
+/*Provide x0, x3; x1 and x2 will be set*/
+void graph_bezier_linear_to_cubic(double x0, double x3, double *x1, double *x2);
+/*Provide x0, x1, x2.  x1 and x2 will be set appropriately.*/
+void graph_bezier_quadratic_to_cubic(double x0, double x3, double *x1, double *x2);
+void graph_set_xaxis(Graph *g, struct graph_axis *axis);
+void graph_set_yaxis(Graph *g, struct graph_axis *axis);
+int graph_autoset_xaxis(Graph *g, GString *title);
+int graph_autoset_yaxis(Graph *g, GString *title);
+
+
 
 #endif             /* !GRAPHCLASS_H_ */