+ // re-arrange keys on game panel, if needed or if defined by style settings
+ for (i = 0; i < MAX_NUM_KEYS + 1; i++) // all normal keys + white key
+ {
+ int nr = GAME_PANEL_KEY_1 + i;
+ struct GamePanelControlInfo *gpc = &game_panel_controls[nr];
+ struct TextPosInfo *pos = gpc->pos;
+
+ // skip check if key is not in the player's inventory
+ if (gpc->value == EL_EMPTY)
+ continue;
+
+ // check if keys should be arranged on panel from left to right
+ if (pos->style == STYLE_LEFTMOST_POSITION)
+ {
+ // check previous key positions (left from current key)
+ for (k = 0; k < i; k++)
+ {
+ int nr_new = GAME_PANEL_KEY_1 + k;
+
+ if (game_panel_controls[nr_new].value == EL_EMPTY)
+ {
+ game_panel_controls[nr_new].value = gpc->value;
+ gpc->value = EL_EMPTY;
+
+ break;
+ }
+ }
+ }
+
+ // check if "undefined" keys can be placed at some other position
+ if (pos->x == -1 && pos->y == -1)
+ {
+ int nr_new = GAME_PANEL_KEY_1 + i % STD_NUM_KEYS;
+
+ // 1st try: display key at the same position as normal or EM keys
+ if (game_panel_controls[nr_new].value == EL_EMPTY)
+ {
+ game_panel_controls[nr_new].value = gpc->value;
+ }
+ else
+ {
+ // 2nd try: display key at the next free position in the key panel
+ for (k = 0; k < STD_NUM_KEYS; k++)
+ {
+ nr_new = GAME_PANEL_KEY_1 + k;
+
+ if (game_panel_controls[nr_new].value == EL_EMPTY)
+ {
+ game_panel_controls[nr_new].value = gpc->value;
+
+ break;
+ }
+ }
+ }
+ }
+ }
+