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968aa28155
It just leaves ugly blank areas, but whatever. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include "dive.h"
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#include "display.h"
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int selected_dive = 0;
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#define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
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/*
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* When showing dive profiles, we scale things to the
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* current dive. However, we don't scale past less than
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* 30 minutes or 90 ft, just so that small dives show
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* up as such.
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*/
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static int round_seconds_up(int seconds)
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{
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return MAX(30*60, ROUND_UP(seconds, 60*10));
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}
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static int round_feet_up(int feet)
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{
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return MAX(90, ROUND_UP(feet+5, 15));
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}
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/* Scale to 0,0 -> maxx,maxy */
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#define SCALE(x,y) (x)*maxx/scalex+topx,(y)*maxy/scaley+topy
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static void plot(cairo_t *cr, int w, int h, struct dive *dive, int samples, struct sample *sample)
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{
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int i;
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double topx, topy, maxx, maxy;
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double scalex, scaley;
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int maxtime, maxdepth;
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int begins, sec, depth;
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topx = w / 20.0;
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topy = h / 20.0;
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maxx = (w - 2*topx);
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maxy = (h - 2*topy);
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cairo_set_line_width(cr, 2);
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/* Get plot scaling limits */
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maxtime = round_seconds_up(dive->duration.seconds);
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maxdepth = round_feet_up(to_feet(dive->maxdepth));
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/* Depth markers: every 15 ft */
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scalex = 1.0;
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scaley = maxdepth;
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cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
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for (i = 15; i < maxdepth; i += 15) {
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cairo_move_to(cr, SCALE(0, i));
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cairo_line_to(cr, SCALE(1, i));
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}
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/* Time markers: every 5 min */
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scalex = maxtime;
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scaley = 1.0;
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for (i = 5*60; i < maxtime; i += 5*60) {
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cairo_move_to(cr, SCALE(i, 0));
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cairo_line_to(cr, SCALE(i, 1));
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}
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cairo_stroke(cr);
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scaley = maxdepth;
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/* Depth profile */
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
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begins = sample->time.seconds;
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cairo_move_to(cr, SCALE(sample->time.seconds, to_feet(sample->depth)));
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for (i = 1; i < dive->samples; i++) {
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sample++;
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sec = sample->time.seconds;
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depth = to_feet(sample->depth);
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cairo_line_to(cr, SCALE(sec, depth));
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}
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scaley = 1.0;
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cairo_line_to(cr, SCALE(sec, 0));
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cairo_line_to(cr, SCALE(begins, 0));
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cairo_close_path(cr);
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.20);
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cairo_fill_preserve(cr);
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
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cairo_stroke(cr);
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/* Bounding box last */
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scalex = scaley = 1.0;
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cairo_set_source_rgb(cr, 1, 1, 1);
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cairo_move_to(cr, SCALE(0,0));
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cairo_line_to(cr, SCALE(0,1));
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cairo_line_to(cr, SCALE(1,1));
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cairo_line_to(cr, SCALE(1,0));
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cairo_close_path(cr);
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cairo_stroke(cr);
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}
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static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
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{
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struct dive *dive = current_dive;
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cairo_t *cr;
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int w,h;
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w = widget->allocation.width;
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h = widget->allocation.height;
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cr = gdk_cairo_create(widget->window);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_paint(cr);
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if (dive && dive->samples)
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plot(cr, w, h, dive, dive->samples, dive->sample);
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cairo_destroy(cr);
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return FALSE;
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}
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GtkWidget *dive_profile_frame(void)
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{
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GtkWidget *frame;
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GtkWidget *da;
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frame = gtk_frame_new("Dive profile");
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gtk_widget_show(frame);
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da = gtk_drawing_area_new();
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gtk_widget_set_size_request(da, 450, 350);
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g_signal_connect(da, "expose_event", G_CALLBACK(expose_event), NULL);
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gtk_container_add(GTK_CONTAINER(frame), da);
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return frame;
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}
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