+static VikTrackpoint *set_center_at_graph_position(gdouble event_x, gint img_width, VikLayersPanel *vlp, VikTrack *tr, gboolean time_base)
+{
+ VikTrackpoint *trackpoint;
+ gdouble x = event_x - img_width / 2 + PROFILE_WIDTH / 2 - MARGIN / 2;
+ if (x < 0)
+ x = 0;
+ if (x > PROFILE_WIDTH)
+ x = PROFILE_WIDTH;
+
+ if (time_base)
+ trackpoint = vik_track_get_closest_tp_by_percentage_time ( tr, (gdouble) x / PROFILE_WIDTH, NULL );
+ else
+ trackpoint = vik_track_get_closest_tp_by_percentage_dist ( tr, (gdouble) x / PROFILE_WIDTH, NULL );
+
+ if ( trackpoint ) {
+ VikCoord coord = trackpoint->coord;
+ vik_viewport_set_center_coord ( vik_layers_panel_get_viewport(vlp), &coord );
+ vik_layers_panel_emit_update ( vlp );
+ }
+ return trackpoint;
+}
+
+static void draw_graph_mark(GtkWidget *image, gdouble event_x, gint img_width, GdkGC *gc, PropSaved *saved_img)
+{
+ GdkPixmap *pix;
+ const int saved_width = 5;
+ /* the pixmap = margin + graph area */
+ gdouble x = event_x - img_width/2 + PROFILE_WIDTH/2 + MARGIN/2;
+
+ // fprintf(stderr, "event_x=%f img_width=%d x=%f\n", event_x, img_width, x);
+
+ gtk_image_get_pixmap(GTK_IMAGE(image), &pix, NULL);
+ if (saved_img->saved) {
+ gdk_draw_image(GDK_DRAWABLE(pix), gc, saved_img->img, 0, 0,
+ saved_img->pos, 0, -1, -1);
+ saved_img->saved = FALSE;
+ gtk_widget_queue_draw_area(image,
+ saved_img->pos + img_width/2 - PROFILE_WIDTH/2 - MARGIN/2, 0,
+ saved_img->img->width, saved_img->img->height);
+ }
+ if ((x >= MARGIN) && (x < (PROFILE_WIDTH + MARGIN))) {
+ if (saved_img->img)
+ gdk_drawable_copy_to_image(GDK_DRAWABLE(pix), saved_img->img,
+ x - (saved_width/2), 0, 0, 0, saved_img->img->width, saved_img->img->height);
+ else
+ saved_img->img = gdk_drawable_copy_to_image(GDK_DRAWABLE(pix),
+ saved_img->img, x - (saved_width/2), 0, 0, 0, saved_width, PROFILE_HEIGHT);
+ saved_img->pos = x - (saved_width/2);
+ saved_img->saved = TRUE;
+ gdk_draw_line (GDK_DRAWABLE(pix), gc, x, 0, x, image->allocation.height);
+ /* redraw the area which contains the line, saved_width is just convenient */
+ gtk_widget_queue_draw_area(image, event_x - saved_width/2, 0, saved_width, PROFILE_HEIGHT);
+ }
+}
+
+static void track_graph_click( GtkWidget *event_box, GdkEventButton *event, gpointer *pass_along, gboolean is_vt_graph )
+{
+ VikTrack *tr = pass_along[0];
+ VikLayersPanel *vlp = pass_along[1];
+ PropWidgets *widgets = pass_along[2];
+ GList *child = gtk_container_get_children(GTK_CONTAINER(event_box));
+ GtkWidget *image = GTK_WIDGET(child->data);
+ GtkWidget *window = gtk_widget_get_toplevel(GTK_WIDGET(event_box));
+
+
+ VikTrackpoint *trackpoint = set_center_at_graph_position(event->x, event_box->allocation.width, vlp, tr, is_vt_graph);
+ draw_graph_mark(image, event->x, event_box->allocation.width, window->style->black_gc,
+ is_vt_graph ? &widgets->speed_graph_saved_img : &widgets->elev_graph_saved_img);
+ g_list_free(child);
+ widgets->marker_tp = trackpoint;
+ gtk_dialog_set_response_sensitive(GTK_DIALOG(widgets->dialog), VIK_TRW_LAYER_PROPWIN_SPLIT_MARKER, TRUE);
+
+ /* draw on the other graph */
+ if (trackpoint == NULL || widgets->elev_box == NULL || widgets->speed_box == NULL)
+ /* This test assumes we have only 2 graphs */
+ return;
+
+ gdouble pc = NAN;
+ gdouble x2;
+ GList *other_child = gtk_container_get_children(GTK_CONTAINER(
+ is_vt_graph ? widgets->elev_box : widgets->speed_box));
+ GtkWidget *other_image = GTK_WIDGET(other_child->data);
+ if (is_vt_graph) {
+ gdouble dist = 0.0;
+ GList *iter;
+ for (iter = tr->trackpoints->next; iter != NULL; iter = iter->next) {
+ dist += vik_coord_diff(&(VIK_TRACKPOINT(iter->data)->coord),
+ &(VIK_TRACKPOINT(iter->prev->data)->coord));
+ /* Assuming trackpoint is not a copy */
+ if (trackpoint == VIK_TRACKPOINT(iter->data))
+ break;
+ }
+ if (iter != NULL)
+ pc = dist/widgets->track_length;
+ } else {
+ time_t t_start, t_end, t_total;
+ t_start = VIK_TRACKPOINT(tr->trackpoints->data)->timestamp;
+ t_end = VIK_TRACKPOINT(g_list_last(tr->trackpoints)->data)->timestamp;
+ t_total = t_end - t_start;
+ pc = (gdouble)(trackpoint->timestamp - t_start)/t_total;
+ }
+ if (!isnan(pc)) {
+ x2 = pc * PROFILE_WIDTH + MARGIN + (event_box->allocation.width/2 - PROFILE_WIDTH/2 - MARGIN/2);
+ draw_graph_mark(other_image, x2, event_box->allocation.width, window->style->black_gc,
+ is_vt_graph ? &widgets->elev_graph_saved_img : &widgets->speed_graph_saved_img);
+ }
+
+ g_list_free(other_child);
+
+}
+
+static gboolean track_profile_click( GtkWidget *event_box, GdkEventButton *event, gpointer *pass_along )
+{
+ track_graph_click(event_box, event, pass_along, FALSE);
+ return TRUE; /* don't call other (further) callbacks */
+}
+
+static gboolean track_vt_click( GtkWidget *event_box, GdkEventButton *event, gpointer *pass_along )