+ 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);
+ }