Create tool-tip with depth/pressure for the whole profile area

This extends on our current tooltip logic (which shows events when you
mouse over them) to show tooltips for the whole profile area.

If you mouse over an event, that is still shown in the tooltip, but
even in the absense of events, the tooltip will be active, and mousing
over the profile area will show the time, depth and pressure.

This can certainly be improved upon further, but even in this form it is
useful.

Fixes #9

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/display.h b/display.h
index 880a8b7be..6eea822aa 100644
--- a/display.h
+++ b/display.h
@@ -21,16 +21,20 @@ extern void do_print(void);
 struct graphics_context {
 	int printer;
 	cairo_t *cr;
+	cairo_rectangle_t drawing_area;
 	double maxx, maxy;
 	double leftx, rightx;
 	double topy, bottomy;
+	unsigned int maxtime;
+	void *plot_info;
 };
 
 typedef enum { SC_SCREEN, SC_PRINT } scale_mode_t;
 
-extern void plot(struct graphics_context *gc, cairo_rectangle_t *drawing_area, struct dive *dive, scale_mode_t scale);
+extern void plot(struct graphics_context *gc, struct dive *dive, scale_mode_t scale);
 extern void init_profile_background(struct graphics_context *gc);
 extern void attach_tooltip(int x, int y, int w, int h, const char *text);
+extern void get_plot_details(struct graphics_context *gc, int time, char *buf, size_t bufsize);
 
 struct options {
 	enum { PRETTY, TABLE, ONEPERPAGE } type;