}
struct game_ui {
- int drag_colour; /* -1 means no drag active */
+ /*
+ * drag_colour:
+ *
+ * - -2 means no drag currently active.
+ * - >=0 means we're dragging a solid colour.
+ * - -1 means we're dragging a blank space, and drag_pencil
+ * might or might not add some pencil-mark stipples to that.
+ */
+ int drag_colour;
int drag_pencil;
int dragx, dragy;
int show_numbers;