rnd-20030615-1-src
[rocksndiamonds.git] / src / editor.c
index 10a59ce5d1a6e27731fc89806a4e401eea0abd50..e56fa695c08339ca4117751f2ffbbba329754c0d 100644 (file)
@@ -71,6 +71,7 @@
 #define ED_BORDER_SIZE                 3
 #define ED_BORDER2_SIZE                        5
 #define ED_GADGET_DISTANCE             2
+#define ED_GADGET_TEXT_DISTANCE                (2 * ED_GADGET_DISTANCE)
 
 /* values for the setting windows */
 #define ED_SETTINGS_XSTART             (3 * MINI_TILEX / 2)
                                         n * ED_COUNTER_YDISTANCE - 2)
 
 /* values for element content drawing areas */
+/* amoeba content */
 #define ED_AREA_ELEM_CONTENT_XPOS      ( 2 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT_YPOS      (22 * MINI_TILEY)
 
+/* custom change target */
 #define ED_AREA_ELEM_CONTENT2_XPOS     (20 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT2_YPOS     (ED_SETTINGS_YPOS(2) + \
                                         ED_GADGET_DISTANCE)
-
+/* optional custom graphic */
 #define ED_AREA_ELEM_CONTENT3_XPOS     (24 * MINI_TILEX)
 #define ED_AREA_ELEM_CONTENT3_YPOS     (ED_SETTINGS_YPOS(1) + \
                                         ED_GADGET_DISTANCE)
-
-#if 1
+/* custom element content */
 #define ED_AREA_ELEM_CONTENT4_XPOS     (29 * MINI_TILEX)
-#define ED_AREA_ELEM_CONTENT4_YPOS     (ED_SETTINGS_YPOS(3) + \
+#define ED_AREA_ELEM_CONTENT4_YPOS     (ED_SETTINGS_YPOS(2) + \
                                         ED_GADGET_DISTANCE - MINI_TILEY)
-#else
-#define ED_AREA_ELEM_CONTENT4_XPOS     (17 * MINI_TILEX)
-#define ED_AREA_ELEM_CONTENT4_YPOS     (ED_SETTINGS_YPOS(11) + \
-                                        ED_GADGET_DISTANCE - MINI_TILEY)
-#endif
+/* custom change trigger element */
+#define ED_AREA_ELEM_CONTENT5_XPOS     (30 * MINI_TILEX + MINI_TILEX / 2)
+#define ED_AREA_ELEM_CONTENT5_YPOS     (ED_SETTINGS_YPOS(7) + \
+                                        ED_GADGET_DISTANCE)
 
 /* values for random placement background drawing area */
 #define ED_AREA_RANDOM_BACKGROUND_XPOS (29 * MINI_TILEX)
 #define GADGET_ID_AMOEBA_CONTENT       (GADGET_ID_DRAWING_AREA_FIRST + 9)
 #define GADGET_ID_CUSTOM_GRAPHIC       (GADGET_ID_DRAWING_AREA_FIRST + 10)
 #define GADGET_ID_CUSTOM_CONTENT       (GADGET_ID_DRAWING_AREA_FIRST + 11)
-#define GADGET_ID_CUSTOM_CHANGED       (GADGET_ID_DRAWING_AREA_FIRST + 12)
-#define GADGET_ID_RANDOM_BACKGROUND    (GADGET_ID_DRAWING_AREA_FIRST + 13)
+#define GADGET_ID_CUSTOM_CHANGE_TARGET (GADGET_ID_DRAWING_AREA_FIRST + 12)
+#define GADGET_ID_CUSTOM_CHANGE_TRIGGER        (GADGET_ID_DRAWING_AREA_FIRST + 13)
+#define GADGET_ID_RANDOM_BACKGROUND    (GADGET_ID_DRAWING_AREA_FIRST + 14)
 
 /* text input identifiers */
-#define GADGET_ID_TEXT_INPUT_FIRST     (GADGET_ID_DRAWING_AREA_FIRST + 14)
+#define GADGET_ID_TEXT_INPUT_FIRST     (GADGET_ID_DRAWING_AREA_FIRST + 15)
 
 #define GADGET_ID_LEVEL_NAME           (GADGET_ID_TEXT_INPUT_FIRST + 0)
 #define GADGET_ID_LEVEL_AUTHOR         (GADGET_ID_TEXT_INPUT_FIRST + 1)
 #define GADGET_ID_CUSTOM_DEADLINESS    (GADGET_ID_SELECTBOX_FIRST + 2)
 #define GADGET_ID_CUSTOM_MOVE_PATTERN  (GADGET_ID_SELECTBOX_FIRST + 3)
 #define GADGET_ID_CUSTOM_MOVE_DIRECTION        (GADGET_ID_SELECTBOX_FIRST + 4)
-#define GADGET_ID_CUSTOM_WALKABLE_LAYER        (GADGET_ID_SELECTBOX_FIRST + 5)
-#define GADGET_ID_CHANGE_TIME_UNITS    (GADGET_ID_SELECTBOX_FIRST + 6)
-#define GADGET_ID_CHANGE_PLAYER_ACTION (GADGET_ID_SELECTBOX_FIRST + 7)
-#define GADGET_ID_CHANGE_CAUSE         (GADGET_ID_SELECTBOX_FIRST + 8)
+#define GADGET_ID_CUSTOM_MOVE_STEPSIZE (GADGET_ID_SELECTBOX_FIRST + 5)
+#define GADGET_ID_CUSTOM_SMASH_TARGETS (GADGET_ID_SELECTBOX_FIRST + 6)
+#define GADGET_ID_CUSTOM_WALKABLE_LAYER        (GADGET_ID_SELECTBOX_FIRST + 7)
+#define GADGET_ID_CHANGE_TIME_UNITS    (GADGET_ID_SELECTBOX_FIRST + 8)
+#define GADGET_ID_CHANGE_PLAYER_ACTION (GADGET_ID_SELECTBOX_FIRST + 9)
+#define GADGET_ID_CHANGE_IMPACT_ACTION (GADGET_ID_SELECTBOX_FIRST + 10)
+#define GADGET_ID_CHANGE_OTHER_ACTION  (GADGET_ID_SELECTBOX_FIRST + 11)
 
 /* textbutton identifiers */
-#define GADGET_ID_TEXTBUTTON_FIRST     (GADGET_ID_SELECTBOX_FIRST + 9)
+#define GADGET_ID_TEXTBUTTON_FIRST     (GADGET_ID_SELECTBOX_FIRST + 12)
 
 #define GADGET_ID_PROPERTIES_INFO      (GADGET_ID_TEXTBUTTON_FIRST + 0)
 #define GADGET_ID_PROPERTIES_CONFIG    (GADGET_ID_TEXTBUTTON_FIRST + 1)
 #define GADGET_ID_STICK_ELEMENT                (GADGET_ID_CHECKBUTTON_FIRST + 5)
 #define GADGET_ID_EM_SLIPPERY_GEMS     (GADGET_ID_CHECKBUTTON_FIRST + 6)
 #define GADGET_ID_CUSTOM_EXPLODE_RESULT        (GADGET_ID_CHECKBUTTON_FIRST + 7)
-#define GADGET_ID_CUSTOM_WALK_TO_OBJECT        (GADGET_ID_CHECKBUTTON_FIRST + 8)
-#define GADGET_ID_CUSTOM_DEADLY                (GADGET_ID_CHECKBUTTON_FIRST + 9)
-#define GADGET_ID_CUSTOM_CAN_MOVE      (GADGET_ID_CHECKBUTTON_FIRST + 10)
-#define GADGET_ID_CUSTOM_CAN_FALL      (GADGET_ID_CHECKBUTTON_FIRST + 11)
-#define GADGET_ID_CUSTOM_CAN_SMASH     (GADGET_ID_CHECKBUTTON_FIRST + 12)
-#define GADGET_ID_CUSTOM_SLIPPERY      (GADGET_ID_CHECKBUTTON_FIRST + 13)
-#define GADGET_ID_CUSTOM_WALKABLE      (GADGET_ID_CHECKBUTTON_FIRST + 14)
-#define GADGET_ID_CUSTOM_USE_GRAPHIC   (GADGET_ID_CHECKBUTTON_FIRST + 15)
-#define GADGET_ID_CUSTOM_USE_TEMPLATE  (GADGET_ID_CHECKBUTTON_FIRST + 16)
-#define GADGET_ID_CUSTOM_CHANGEABLE    (GADGET_ID_CHECKBUTTON_FIRST + 17)
-#define GADGET_ID_CHANGE_DELAY         (GADGET_ID_CHECKBUTTON_FIRST + 18)
-#define GADGET_ID_CHANGE_BY_PLAYER     (GADGET_ID_CHECKBUTTON_FIRST + 19)
+#define GADGET_ID_CUSTOM_EXPLODE_FIRE  (GADGET_ID_CHECKBUTTON_FIRST + 8)
+#define GADGET_ID_CUSTOM_EXPLODE_SMASH (GADGET_ID_CHECKBUTTON_FIRST + 9)
+#define GADGET_ID_CUSTOM_EXPLODE_IMPACT        (GADGET_ID_CHECKBUTTON_FIRST + 10)
+#define GADGET_ID_CUSTOM_WALK_TO_OBJECT        (GADGET_ID_CHECKBUTTON_FIRST + 11)
+#define GADGET_ID_CUSTOM_DEADLY                (GADGET_ID_CHECKBUTTON_FIRST + 12)
+#define GADGET_ID_CUSTOM_CAN_MOVE      (GADGET_ID_CHECKBUTTON_FIRST + 13)
+#define GADGET_ID_CUSTOM_CAN_FALL      (GADGET_ID_CHECKBUTTON_FIRST + 14)
+#define GADGET_ID_CUSTOM_CAN_SMASH     (GADGET_ID_CHECKBUTTON_FIRST + 15)
+#define GADGET_ID_CUSTOM_SLIPPERY      (GADGET_ID_CHECKBUTTON_FIRST + 16)
+#define GADGET_ID_CUSTOM_WALKABLE      (GADGET_ID_CHECKBUTTON_FIRST + 17)
+#define GADGET_ID_CUSTOM_USE_GRAPHIC   (GADGET_ID_CHECKBUTTON_FIRST + 18)
+#define GADGET_ID_CUSTOM_USE_TEMPLATE  (GADGET_ID_CHECKBUTTON_FIRST + 19)
+#define GADGET_ID_CUSTOM_CAN_CHANGE    (GADGET_ID_CHECKBUTTON_FIRST + 20)
+#define GADGET_ID_CHANGE_DELAY         (GADGET_ID_CHECKBUTTON_FIRST + 21)
+#define GADGET_ID_CHANGE_BY_PLAYER     (GADGET_ID_CHECKBUTTON_FIRST + 22)
+#define GADGET_ID_CHANGE_IMPACT_SMASHED        (GADGET_ID_CHECKBUTTON_FIRST + 23)
+#define GADGET_ID_CHANGE_BY_OTHER      (GADGET_ID_CHECKBUTTON_FIRST + 24)
 
 /* gadgets for buttons in element list */
-#define GADGET_ID_ELEMENTLIST_FIRST    (GADGET_ID_CHECKBUTTON_FIRST + 20)
+#define GADGET_ID_ELEMENTLIST_FIRST    (GADGET_ID_CHECKBUTTON_FIRST + 25)
 #define GADGET_ID_ELEMENTLIST_LAST     (GADGET_ID_ELEMENTLIST_FIRST +  \
                                        ED_NUM_ELEMENTLIST_BUTTONS - 1)
 
 #define ED_SELECTBOX_ID_CUSTOM_DEADLINESS      2
 #define ED_SELECTBOX_ID_CUSTOM_MOVE_PATTERN    3
 #define ED_SELECTBOX_ID_CUSTOM_MOVE_DIRECTION  4
-#define ED_SELECTBOX_ID_CUSTOM_WALKABLE_LAYER  5
-#define ED_SELECTBOX_ID_CHANGE_TIME_UNITS      6
-#define ED_SELECTBOX_ID_CHANGE_PLAYER_ACTION   7
-#define ED_SELECTBOX_ID_CHANGE_CAUSE           8
+#define ED_SELECTBOX_ID_CUSTOM_MOVE_STEPSIZE   5
+#define ED_SELECTBOX_ID_CUSTOM_SMASH_TARGETS   6
+#define ED_SELECTBOX_ID_CUSTOM_WALKABLE_LAYER  7
+#define ED_SELECTBOX_ID_CHANGE_TIME_UNITS      8
+#define ED_SELECTBOX_ID_CHANGE_PLAYER_ACTION   9
+#define ED_SELECTBOX_ID_CHANGE_IMPACT_ACTION   10
+#define ED_SELECTBOX_ID_CHANGE_OTHER_ACTION    11
 
-#define ED_NUM_SELECTBOX                       9
+#define ED_NUM_SELECTBOX                       12
 
 #define ED_SELECTBOX_ID_CUSTOM_FIRST   ED_SELECTBOX_ID_CUSTOM_WALK_TO_ACTION
 #define ED_SELECTBOX_ID_CUSTOM_LAST    ED_SELECTBOX_ID_CUSTOM_WALKABLE_LAYER
 
 #define ED_SELECTBOX_ID_CHANGE_FIRST   ED_SELECTBOX_ID_CHANGE_TIME_UNITS
-#define ED_SELECTBOX_ID_CHANGE_LAST    ED_SELECTBOX_ID_CHANGE_CAUSE
+#define ED_SELECTBOX_ID_CHANGE_LAST    ED_SELECTBOX_ID_CHANGE_OTHER_ACTION
 
 /* values for textbutton gadgets */
 #define ED_TEXTBUTTON_ID_PROPERTIES_INFO       0
 #define ED_CHECKBUTTON_ID_STICK_ELEMENT                3
 #define ED_CHECKBUTTON_ID_EM_SLIPPERY_GEMS     4
 #define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_RESULT        5
-#define ED_CHECKBUTTON_ID_CUSTOM_WALK_TO_OBJECT        6
-#define ED_CHECKBUTTON_ID_CUSTOM_DEADLY                7
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_MOVE      8
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_FALL      9
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_SMASH     10
-#define ED_CHECKBUTTON_ID_CUSTOM_SLIPPERY      11
-#define ED_CHECKBUTTON_ID_CUSTOM_WALKABLE      12
-#define ED_CHECKBUTTON_ID_CUSTOM_USE_GRAPHIC   13
-#define ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE  14
-#define ED_CHECKBUTTON_ID_CUSTOM_CHANGEABLE    15
-#define ED_CHECKBUTTON_ID_CHANGE_DELAY         16
-#define ED_CHECKBUTTON_ID_CHANGE_BY_PLAYER     17
-
-#define ED_NUM_CHECKBUTTONS                    18
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_FIRE  6
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_SMASH 7
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_IMPACT        8
+#define ED_CHECKBUTTON_ID_CUSTOM_WALK_TO_OBJECT        9
+#define ED_CHECKBUTTON_ID_CUSTOM_DEADLY                10
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_MOVE      11
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_FALL      12
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_SMASH     13
+#define ED_CHECKBUTTON_ID_CUSTOM_SLIPPERY      14
+#define ED_CHECKBUTTON_ID_CUSTOM_WALKABLE      15
+#define ED_CHECKBUTTON_ID_CUSTOM_USE_GRAPHIC   16
+#define ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE  17
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_CHANGE    18
+#define ED_CHECKBUTTON_ID_CHANGE_DELAY         19
+#define ED_CHECKBUTTON_ID_CHANGE_BY_PLAYER     20
+#define ED_CHECKBUTTON_ID_CHANGE_IMPACT_SMASHED        21
+#define ED_CHECKBUTTON_ID_CHANGE_BY_OTHER      22
+
+#define ED_NUM_CHECKBUTTONS                    23
 
 #define ED_CHECKBUTTON_ID_LEVEL_FIRST  ED_CHECKBUTTON_ID_DOUBLE_SPEED
 #define ED_CHECKBUTTON_ID_LEVEL_LAST   ED_CHECKBUTTON_ID_RANDOM_RESTRICTED
 #define ED_CHECKBUTTON_ID_CUSTOM_LAST  ED_CHECKBUTTON_ID_CUSTOM_WALKABLE
 
 #define ED_CHECKBUTTON_ID_CHANGE_FIRST ED_CHECKBUTTON_ID_CUSTOM_USE_GRAPHIC
-#define ED_CHECKBUTTON_ID_CHANGE_LAST  ED_CHECKBUTTON_ID_CHANGE_BY_PLAYER
+#define ED_CHECKBUTTON_ID_CHANGE_LAST  ED_CHECKBUTTON_ID_CHANGE_BY_OTHER
 
 /* values for radiobutton gadgets */
 #define ED_RADIOBUTTON_ID_PERCENTAGE   0
@@ -816,7 +834,7 @@ static struct ValueTextInfo options_walk_to_action[] =
   { EP_PUSHABLE,               "pushable"                      },
   { -1,                                NULL                            }
 };
-static int index_walk_to_action = 0;
+static int value_walk_to_action = 0;
 
 static struct ValueTextInfo options_move_pattern[] =
 {
@@ -833,7 +851,6 @@ static struct ValueTextInfo options_move_pattern[] =
   { MV_ALONG_RIGHT_SIDE,       "along right side"              },
   { -1,                                NULL                            }
 };
-static int index_move_pattern = 0;
 
 static struct ValueTextInfo options_move_direction[] =
 {
@@ -844,17 +861,24 @@ static struct ValueTextInfo options_move_direction[] =
   { MV_DOWN,                   "down"                          },
   { -1,                                NULL                            }
 };
-static int index_move_direction = 0;
+
+static struct ValueTextInfo options_move_stepsize[] =
+{
+  { 1,                         "very slow"                     },
+  { 2,                         "slow"                          },
+  { 4,                         "normal"                        },
+  { 8,                         "fast"                          },
+  { 16,                                "very fast"                     },
+  { -1,                                NULL                            }
+};
 
 static struct ValueTextInfo options_consistency[] =
 {
+  { EP_CAN_EXPLODE,            "can explode"                   },
   { EP_INDESTRUCTIBLE,         "indestructible"                },
-  { EP_CAN_EXPLODE_BY_FIRE,    "can explode by fire"           },
-  { EP_CAN_EXPLODE_SMASHED,    "can explode when smashed"      },
-  { EP_CAN_EXPLODE_IMPACT,     "can explode on impact"         },
   { -1,                                NULL                            }
 };
-static int index_consistency = 0;
+static int value_consistency = 0;
 
 static struct ValueTextInfo options_deadliness[] =
 {
@@ -863,7 +887,16 @@ static struct ValueTextInfo options_deadliness[] =
   { EP_DONT_TOUCH,             "touching"                      },
   { -1,                                NULL                            }
 };
-static int index_deadliness = 0;
+static int value_deadliness = 0;
+
+static struct ValueTextInfo options_smash_targets[] =
+{
+  { EP_CAN_SMASH_PLAYER,       "player"                        },
+  { EP_CAN_SMASH_ENEMIES,      "enemies"                       },
+  { EP_CAN_SMASH_EVERYTHING,   "everything"                    },
+  { -1,                                NULL                            }
+};
+static int value_smash_targets = 0;
 
 static struct ValueTextInfo options_walkable_layer[] =
 {
@@ -872,7 +905,7 @@ static struct ValueTextInfo options_walkable_layer[] =
   { EP_WALKABLE_UNDER,         "under"                         },
   { -1,                                NULL                            }
 };
-static int index_walkable_layer = 0;
+static int value_walkable_layer = 0;
 
 static struct ValueTextInfo options_time_units[] =
 {
@@ -880,26 +913,33 @@ static struct ValueTextInfo options_time_units[] =
   { 1,                         "frames"                        },
   { -1,                                NULL                            }
 };
-static int index_time_units = 0;
 
 static struct ValueTextInfo options_change_player_action[] =
 {
-  { CE_PRESSED_BY_PLAYER,      "pressed"                       },
   { CE_TOUCHED_BY_PLAYER,      "touched"                       },
+  { CE_PRESSED_BY_PLAYER,      "pressed"                       },
+  { CE_PUSHED_BY_PLAYER,       "pushed"                        },
+  { -1,                                NULL                            }
+};
+static int value_change_player_action = 0;
+
+static struct ValueTextInfo options_change_impact_action[] =
+{
+  { CE_IMPACT,                 "on impact"                     },
+  { CE_SMASHED,                        "when smashed"                  },
   { -1,                                NULL                            }
 };
-static int index_change_player_action = 0, value_change_player_action = 0;
+static int value_change_impact_action = 0;
 
-static struct ValueTextInfo options_change_cause[] =
+static struct ValueTextInfo options_change_other_action[] =
 {
-  { 1,                         "specified delay"               },
-  { 2,                         "impact (active)"               },
-  { 3,                         "impact (passive)"              },
-  { 4,                         "touched by player"             },
-  { 5,                         "pressed by player"             },
+  { CE_OTHER_COLLECTING,       "collecting"                    },
+  { CE_OTHER_PUSHING,          "pushing"                       },
+  { CE_OTHER_CHANGING,         "change of"                     },
+  { CE_OTHER_EXPLODING,                "explosion of"                  },
   { -1,                                NULL                            }
 };
-static int index_change_cause = 0, value_change_cause = 0;
+static int value_change_other_action = 0;
 
 static struct
 {
@@ -907,7 +947,7 @@ static struct
   int gadget_id;
   int size;    /* char size of selectbox or '-1' (dynamically determined) */
   struct ValueTextInfo *options;
-  int *index, *value;
+  int *value;
   char *text_left, *text_right, *infotext;
 } selectbox_info[ED_NUM_SELECTBOX] =
 {
@@ -915,31 +955,31 @@ static struct
     ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(4),
     GADGET_ID_CUSTOM_WALK_TO_ACTION,
     -1,
-    options_walk_to_action, &index_walk_to_action,
-    &custom_element.walk_to_action,
+    options_walk_to_action,
+    &value_walk_to_action,
     NULL, NULL, "diggable/collectible/pushable"
   },
   {
-    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(3),
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(2),
     GADGET_ID_CUSTOM_CONSISTENCY,
     -1,
-    options_consistency, &index_consistency,
-    &custom_element.consistency,
-    NULL, "to", "consistency/destructibility"
+    options_consistency,
+    &value_consistency,
+    NULL, "explodes to:", "consistency/destructibility"
   },
   {
-    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(2),
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(1),
     GADGET_ID_CUSTOM_DEADLINESS,
     -1,
-    options_deadliness, &index_deadliness,
-    &custom_element.deadliness,
+    options_deadliness,
+    &value_deadliness,
     "deadly when", NULL, "deadliness of element"
   },
   {
     ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(6),
     GADGET_ID_CUSTOM_MOVE_PATTERN,
     -1,
-    options_move_pattern, &index_move_pattern,
+    options_move_pattern,
     &custom_element.move_pattern,
     "can move", NULL, "element move direction"
   },
@@ -947,23 +987,39 @@ static struct
     ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(7),
     GADGET_ID_CUSTOM_MOVE_DIRECTION,
     -1,
-    options_move_direction, &index_move_direction,
+    options_move_direction,
     &custom_element.move_direction_initial,
     "starts moving", NULL, "initial element move direction"
   },
   {
-    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(13),
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(9),
+    GADGET_ID_CUSTOM_MOVE_STEPSIZE,
+    -1,
+    options_move_stepsize,
+    &custom_element.move_stepsize,
+    "move speed", NULL, "speed of element movement"
+  },
+  {
+    ED_SETTINGS_XPOS(7),               ED_SETTINGS_YPOS(10),
+    GADGET_ID_CUSTOM_SMASH_TARGETS,
+    -1,
+    options_smash_targets,
+    &value_smash_targets,
+    "can smash", NULL, "elements that can be smashed"
+  },
+  {
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(12),
     GADGET_ID_CUSTOM_WALKABLE_LAYER,
     -1,
-    options_walkable_layer, &index_walkable_layer,
-    &custom_element.walkable_layer,
+    options_walkable_layer,
+    &value_walkable_layer,
     "player can walk", NULL, "layer where player can walk"
   },
   {
     ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(4),
     GADGET_ID_CHANGE_TIME_UNITS,
     -1,
-    options_time_units, &index_time_units,
+    options_time_units,
     &custom_element.change.delay_frames,
     "delay time given in", NULL, "delay time units for change"
   },
@@ -971,17 +1027,25 @@ static struct
     ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(5),
     GADGET_ID_CHANGE_PLAYER_ACTION,
     -1,
-    options_change_player_action, &index_change_player_action,
+    options_change_player_action,
     &value_change_player_action,
     NULL, "by player", "type of player contact"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(10),
-    GADGET_ID_CHANGE_CAUSE,
+    ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(6),
+    GADGET_ID_CHANGE_IMPACT_ACTION,
     -1,
-    options_change_cause, &index_change_cause,
-    &value_change_cause,
-    "test:", NULL, "test-selectbox entry"
+    options_change_impact_action,
+    &value_change_impact_action,
+    NULL, NULL, "change after impact or smash"
+  },
+  {
+    ED_SETTINGS_XPOS(2),               ED_SETTINGS_YPOS(7),
+    GADGET_ID_CHANGE_OTHER_ACTION,
+    -1,
+    options_change_other_action,
+    &value_change_other_action,
+    NULL, "other element:", "type of other element action"
   },
 };
 
@@ -1162,11 +1226,29 @@ static struct
     "slip down from certain flat walls","use EM style slipping behaviour"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(3),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(2),
     GADGET_ID_CUSTOM_EXPLODE_RESULT,
     &custom_element_properties[EP_EXPLODE_RESULT],
     NULL,                              "set consistency/destructibility"
   },
+  {
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(3),
+    GADGET_ID_CUSTOM_EXPLODE_FIRE,
+    &custom_element_properties[EP_CAN_EXPLODE_BY_FIRE],
+    "by fire",                         "element can explode by fire/explosion"
+  },
+  {
+    ED_SETTINGS_XPOS(7),               ED_SETTINGS_YPOS(3),
+    GADGET_ID_CUSTOM_EXPLODE_SMASH,
+    &custom_element_properties[EP_CAN_EXPLODE_SMASHED],
+    "smashed",                         "element can explode when smashed"
+  },
+  {
+    ED_SETTINGS_XPOS(13),              ED_SETTINGS_YPOS(3),
+    GADGET_ID_CUSTOM_EXPLODE_IMPACT,
+    &custom_element_properties[EP_CAN_EXPLODE_IMPACT],
+    "impact",                          "element can explode on impact"
+  },
   {
     ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(4),
     GADGET_ID_CUSTOM_WALK_TO_OBJECT,
@@ -1174,7 +1256,7 @@ static struct
     NULL,                              "player can dig/collect/push element"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(2),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(1),
     GADGET_ID_CUSTOM_DEADLY,
     &custom_element_properties[EP_DEADLY],
     NULL,                              "element can kill the player"
@@ -1186,25 +1268,25 @@ static struct
     NULL,                              "element can move in some direction"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(9),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(10),
     GADGET_ID_CUSTOM_CAN_FALL,
     &custom_element_properties[EP_CAN_FALL],
     "can fall",                                "element can fall down"
   },
   {
-    ED_SETTINGS_XPOS(6),               ED_SETTINGS_YPOS(9),
+    ED_SETTINGS_XPOS(6),               ED_SETTINGS_YPOS(10),
     GADGET_ID_CUSTOM_CAN_SMASH,
     &custom_element_properties[EP_CAN_SMASH],
-    "can smash on impact",             "element can smash other elements"
+    NULL,                              "element can smash other elements"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(10),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(11),
     GADGET_ID_CUSTOM_SLIPPERY,
     &custom_element_properties[EP_SLIPPERY],
     "slippery",                                "other elements can fall down from it"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(13),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(12),
     GADGET_ID_CUSTOM_WALKABLE,
     &custom_element_properties[EP_WALKABLE],
     NULL,                              "player can walk on the same field"
@@ -1223,8 +1305,8 @@ static struct
   },
   {
     ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(2),
-    GADGET_ID_CUSTOM_CHANGEABLE,
-    &custom_element_properties[EP_CHANGEABLE],
+    GADGET_ID_CUSTOM_CAN_CHANGE,
+    &custom_element_properties[EP_CAN_CHANGE],
     "element changes to    after/when:","element can change to other element"
   },
   {
@@ -1239,6 +1321,18 @@ static struct
     &custom_element_change_events[CE_BY_PLAYER],
     NULL,                              "element changes by player contact"
   },
+  {
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(6),
+    GADGET_ID_CHANGE_IMPACT_SMASHED,
+    &custom_element_change_events[CE_IMPACT_SMASHED],
+    NULL,                              "element changes by impact or smash"
+  },
+  {
+    ED_SETTINGS_XPOS(1),               ED_SETTINGS_YPOS(7),
+    GADGET_ID_CHANGE_BY_OTHER,
+    &custom_element_change_events[CE_BY_OTHER],
+    NULL,                              "element changes by other element"
+  },
 };
 
 
@@ -2428,7 +2522,7 @@ static void CreateCounterButtons()
     if (counterbutton_info[i].text_left != NULL)
       xoffset = (getFontWidth(FONT_TEXT_1) *
                 strlen(counterbutton_info[i].text_left) +
-                2 * ED_GADGET_DISTANCE);
+                ED_GADGET_TEXT_DISTANCE);
 
     for (j=0; j<2; j++)
     {
@@ -2670,7 +2764,7 @@ static void CreateDrawingAreas()
   level_editor_gadget[id] = gi;
 
   /* ... one for each custom element change target element ... */
-  id = GADGET_ID_CUSTOM_CHANGED;
+  id = GADGET_ID_CUSTOM_CHANGE_TARGET;
   gi = CreateGadget(GDI_CUSTOM_ID, id,
                    GDI_X, SX + ED_AREA_ELEM_CONTENT2_XPOS,
                    GDI_Y, SY + ED_AREA_ELEM_CONTENT2_YPOS,
@@ -2688,8 +2782,26 @@ static void CreateDrawingAreas()
 
   level_editor_gadget[id] = gi;
 
-  /* ... and one for random placement background restrictions */
+  /* ... one for each custom element change trigger element ... */
+  id = GADGET_ID_CUSTOM_CHANGE_TRIGGER;
+  gi = CreateGadget(GDI_CUSTOM_ID, id,
+                   GDI_X, SX + ED_AREA_ELEM_CONTENT5_XPOS,
+                   GDI_Y, SY + ED_AREA_ELEM_CONTENT5_YPOS,
+                   GDI_WIDTH, MINI_TILEX,
+                   GDI_HEIGHT, MINI_TILEY,
+                   GDI_TYPE, GD_TYPE_DRAWING_AREA,
+                   GDI_ITEM_SIZE, MINI_TILEX, MINI_TILEY,
+                   GDI_EVENT_MASK, event_mask,
+                   GDI_CALLBACK_INFO, HandleDrawingAreaInfo,
+                   GDI_CALLBACK_ACTION, HandleDrawingAreas,
+                   GDI_END);
+
+  if (gi == NULL)
+    Error(ERR_EXIT, "cannot create gadget");
+
+  level_editor_gadget[id] = gi;
 
+  /* ... and one for random placement background restrictions */
   id = GADGET_ID_RANDOM_BACKGROUND;
   gi = CreateGadget(GDI_CUSTOM_ID, id,
                    GDI_X, SX + ED_AREA_RANDOM_BACKGROUND_XPOS,
@@ -2796,7 +2908,7 @@ static void CreateSelectboxGadgets()
     if (selectbox_info[i].text_left != NULL)
       xoffset = (getFontWidth(FONT_TEXT_1) *
                 strlen(selectbox_info[i].text_left) +
-                2 * ED_GADGET_DISTANCE);
+                ED_GADGET_TEXT_DISTANCE);
 
     sprintf(infotext, "Select %s", selectbox_info[i].infotext);
     infotext[max_infotext_len] = '\0';
@@ -2808,7 +2920,6 @@ static void CreateSelectboxGadgets()
                      GDI_Y, SY + selectbox_info[i].y,
                      GDI_TYPE, GD_TYPE_SELECTBOX,
                      GDI_SELECTBOX_OPTIONS, selectbox_info[i].options,
-                     GDI_SELECTBOX_INDEX, selectbox_info[i].index,
                      GDI_TEXT_SIZE, selectbox_info[i].size,
                      GDI_TEXT_FONT, FONT_INPUT_1,
                      GDI_TEXT_FONT_ACTIVE, FONT_INPUT_1_ACTIVE,
@@ -3179,7 +3290,7 @@ static void MapSelectboxGadget(int id)
 {
   int xoffset_left = 0;
   int yoffset_left = ED_BORDER_SIZE;
-  int xoffset_right = ED_BORDER_SIZE;
+  int xoffset_right = ED_GADGET_TEXT_DISTANCE;
   int yoffset_right = ED_BORDER_SIZE;
   int x = selectbox_info[id].x + xoffset_left;
   int y = selectbox_info[id].y + yoffset_left;
@@ -3357,7 +3468,7 @@ static void CopyCustomElementPropertiesToEditor(int element)
     custom_element_change_events[i] = HAS_CHANGE_EVENT(element, i);
 
   /* set walk-to-object action selectbox help value */
-  custom_element.walk_to_action =
+  value_walk_to_action =
     (IS_DIGGABLE(element) ? EP_DIGGABLE :
      IS_COLLECTIBLE(element) ? EP_COLLECTIBLE :
      IS_PUSHABLE(element) ? EP_PUSHABLE :
@@ -3368,16 +3479,16 @@ static void CopyCustomElementPropertiesToEditor(int element)
      IS_PUSHABLE(element));
 
   /* set consistency selectbox help value */
-  custom_element.consistency =
-    (IS_INDESTRUCTIBLE(element) ? EP_INDESTRUCTIBLE :
-     CAN_EXPLODE_BY_FIRE(element) ? EP_CAN_EXPLODE_BY_FIRE :
-     EP_INDESTRUCTIBLE);
+  value_consistency =
+    (CAN_EXPLODE(element) ? EP_CAN_EXPLODE :
+     IS_INDESTRUCTIBLE(element) ? EP_INDESTRUCTIBLE :
+     EP_CAN_EXPLODE);
   custom_element_properties[EP_EXPLODE_RESULT] =
-    (IS_INDESTRUCTIBLE(element) ||
-     CAN_EXPLODE_BY_FIRE(element));
+    (CAN_EXPLODE(element) ||
+     IS_INDESTRUCTIBLE(element));
 
   /* set deadliness selectbox help value */
-  custom_element.deadliness =
+  value_deadliness =
     (DONT_TOUCH(element) ? EP_DONT_TOUCH :
      DONT_COLLIDE_WITH(element) ? EP_DONT_COLLIDE_WITH :
      DONT_RUN_INTO(element) ? EP_DONT_RUN_INTO :
@@ -3387,8 +3498,19 @@ static void CopyCustomElementPropertiesToEditor(int element)
      DONT_COLLIDE_WITH(element) ||
      DONT_RUN_INTO(element));
 
+  /* set smash targets selectbox help value */
+  value_smash_targets =
+    (CAN_SMASH_EVERYTHING(element) ? EP_CAN_SMASH_EVERYTHING :
+     CAN_SMASH_ENEMIES(element) ? EP_CAN_SMASH_ENEMIES :
+     CAN_SMASH_PLAYER(element) ? EP_CAN_SMASH_PLAYER :
+     EP_CAN_SMASH_PLAYER);
+  custom_element_properties[EP_CAN_SMASH] =
+    (CAN_SMASH_EVERYTHING(element) ||
+     CAN_SMASH_ENEMIES(element) ||
+     CAN_SMASH_PLAYER(element));
+
   /* set walkable layer selectbox help value */
-  custom_element.walkable_layer =
+  value_walkable_layer =
     (IS_WALKABLE_OVER(element) ? EP_WALKABLE_OVER :
      IS_WALKABLE_INSIDE(element) ? EP_WALKABLE_INSIDE :
      IS_WALKABLE_UNDER(element) ? EP_WALKABLE_UNDER :
@@ -3400,9 +3522,24 @@ static void CopyCustomElementPropertiesToEditor(int element)
 
   /* set change by player selectbox help value */
   value_change_player_action =
-    (HAS_CHANGE_EVENT(element, CE_TOUCHED_BY_PLAYER) ? CE_TOUCHED_BY_PLAYER :
+    (HAS_CHANGE_EVENT(element, CE_PUSHED_BY_PLAYER) ? CE_PUSHED_BY_PLAYER :
      HAS_CHANGE_EVENT(element, CE_PRESSED_BY_PLAYER) ? CE_PRESSED_BY_PLAYER :
+     HAS_CHANGE_EVENT(element, CE_TOUCHED_BY_PLAYER) ? CE_TOUCHED_BY_PLAYER :
      CE_PRESSED_BY_PLAYER);
+
+  /* set change by impact/smash selectbox help value */
+  value_change_impact_action =
+    (HAS_CHANGE_EVENT(element, CE_SMASHED) ? CE_SMASHED :
+     HAS_CHANGE_EVENT(element, CE_IMPACT) ? CE_IMPACT :
+     CE_IMPACT);
+
+  /* set change by other element action selectbox help value */
+  value_change_other_action =
+    (HAS_CHANGE_EVENT(element, CE_OTHER_EXPLODING) ? CE_OTHER_EXPLODING :
+     HAS_CHANGE_EVENT(element, CE_OTHER_CHANGING) ? CE_OTHER_CHANGING :
+     HAS_CHANGE_EVENT(element, CE_OTHER_PUSHING) ? CE_OTHER_PUSHING :
+     HAS_CHANGE_EVENT(element, CE_OTHER_COLLECTING) ? CE_OTHER_COLLECTING :
+     CE_OTHER_COLLECTING);
 }
 
 static void CopyCustomElementPropertiesToGame(int element)
@@ -3415,33 +3552,56 @@ static void CopyCustomElementPropertiesToGame(int element)
   custom_element_properties[EP_DIGGABLE] = FALSE;
   custom_element_properties[EP_COLLECTIBLE] = FALSE;
   custom_element_properties[EP_PUSHABLE] = FALSE;
-  custom_element_properties[custom_element.walk_to_action] =
+  custom_element_properties[value_walk_to_action] =
     custom_element_properties[EP_WALK_TO_OBJECT];
 
   /* set consistency property from checkbox and selectbox */
+  custom_element_properties[EP_CAN_EXPLODE] = FALSE;
   custom_element_properties[EP_INDESTRUCTIBLE] = FALSE;
-  custom_element_properties[EP_CAN_EXPLODE_BY_FIRE] = FALSE;
-  custom_element_properties[custom_element.consistency] =
+  custom_element_properties[value_consistency] =
     custom_element_properties[EP_EXPLODE_RESULT];
 
   /* set deadliness property from checkbox and selectbox */
   custom_element_properties[EP_DONT_RUN_INTO] = FALSE;
   custom_element_properties[EP_DONT_COLLIDE_WITH] = FALSE;
   custom_element_properties[EP_DONT_TOUCH] = FALSE;
-  custom_element_properties[custom_element.deadliness] =
+  custom_element_properties[value_deadliness] =
     custom_element_properties[EP_DEADLY];
 
+  /* set smash property from checkbox and selectbox */
+  custom_element_properties[EP_CAN_SMASH_PLAYER] = FALSE;
+  custom_element_properties[EP_CAN_SMASH_ENEMIES] = FALSE;
+  custom_element_properties[EP_CAN_SMASH_EVERYTHING] = FALSE;
+  custom_element_properties[value_smash_targets] =
+    custom_element_properties[EP_CAN_SMASH];
+
   /* set walkable property from checkbox and selectbox */
   custom_element_properties[EP_WALKABLE_OVER] = FALSE;
   custom_element_properties[EP_WALKABLE_INSIDE] = FALSE;
   custom_element_properties[EP_WALKABLE_UNDER] = FALSE;
-  custom_element_properties[custom_element.walkable_layer] =
+  custom_element_properties[value_walkable_layer] =
     custom_element_properties[EP_WALKABLE];
 
   /* set player change event from checkbox and selectbox */
-  custom_element.change.events &= ~CE_PRESSED_BY_PLAYER;
-  custom_element.change.events &= ~CE_TOUCHED_BY_PLAYER;
-  custom_element.change.events |= value_change_player_action;
+  custom_element_change_events[CE_TOUCHED_BY_PLAYER] = FALSE;
+  custom_element_change_events[CE_PRESSED_BY_PLAYER] = FALSE;
+  custom_element_change_events[CE_PUSHED_BY_PLAYER] = FALSE;
+  custom_element_change_events[value_change_player_action] =
+    custom_element_change_events[CE_BY_PLAYER];
+
+  /* set player change event from checkbox and selectbox */
+  custom_element_change_events[CE_IMPACT] = FALSE;
+  custom_element_change_events[CE_SMASHED] = FALSE;
+  custom_element_change_events[value_change_impact_action] =
+    custom_element_change_events[CE_IMPACT_SMASHED];
+
+  /* set other element action change event from checkbox and selectbox */
+  custom_element_change_events[CE_OTHER_COLLECTING] = FALSE;
+  custom_element_change_events[CE_OTHER_PUSHING] = FALSE;
+  custom_element_change_events[CE_OTHER_CHANGING] = FALSE;
+  custom_element_change_events[CE_OTHER_EXPLODING] = FALSE;
+  custom_element_change_events[value_change_other_action] =
+    custom_element_change_events[CE_BY_OTHER];
 
   for (i=0; i < NUM_ELEMENT_PROPERTIES; i++)
     SET_PROPERTY(element, i, custom_element_properties[i]);
@@ -3860,9 +4020,9 @@ static void DrawCustomContentArea()
   MapDrawingArea(GADGET_ID_CUSTOM_CONTENT);
 }
 
-static void DrawCustomChangedArea()
+static void DrawCustomChangeTargetArea()
 {
-  struct GadgetInfo *gi = level_editor_gadget[GADGET_ID_CUSTOM_CHANGED];
+  struct GadgetInfo *gi = level_editor_gadget[GADGET_ID_CUSTOM_CHANGE_TARGET];
   int xpos = ED_AREA_ELEM_CONTENT2_XPOS;
   int ypos = ED_AREA_ELEM_CONTENT2_YPOS;
   int area_sx = SX + xpos;
@@ -3880,7 +4040,30 @@ static void DrawCustomChangedArea()
   DrawMiniGraphicExt(drawto, gi->x, gi->y,
                     el2edimg(custom_element.change.successor));
 
-  MapDrawingArea(GADGET_ID_CUSTOM_CHANGED);
+  MapDrawingArea(GADGET_ID_CUSTOM_CHANGE_TARGET);
+}
+
+static void DrawCustomChangeTriggerArea()
+{
+  struct GadgetInfo *gi = level_editor_gadget[GADGET_ID_CUSTOM_CHANGE_TRIGGER];
+  int xpos = ED_AREA_ELEM_CONTENT5_XPOS;
+  int ypos = ED_AREA_ELEM_CONTENT5_YPOS;
+  int area_sx = SX + xpos;
+  int area_sy = SY + ypos;
+
+  if (!IS_CUSTOM_ELEMENT(properties_element))
+  {
+    /* this should never happen */
+    Error(ERR_WARN, "element %d is no custom element", properties_element);
+
+    return;
+  }
+
+  DrawElementBorder(area_sx, area_sy, MINI_TILEX, MINI_TILEY, TRUE);
+  DrawMiniGraphicExt(drawto, gi->x, gi->y,
+                    el2edimg(custom_element.change.trigger));
+
+  MapDrawingArea(GADGET_ID_CUSTOM_CHANGE_TRIGGER);
 }
 
 static void DrawElementContentAreas()
@@ -4174,8 +4357,16 @@ static void DrawPropertiesInfo()
 
     { EP_CAN_MOVE,             "- can move"                            },
     { EP_CAN_FALL,             "- can fall"                            },
-    { EP_CAN_SMASH,            "- can smash other objects"             },
-    { EP_CAN_EXPLODE_BY_FIRE,  "- can explode (by fire/explosion)"     },
+#if 0
+    { EP_CAN_SMASH,            "- can smash"                           },
+#endif
+    { EP_CAN_SMASH_PLAYER,     "- can smash player"                    },
+    { EP_CAN_SMASH_ENEMIES,    "- can smash good and bad guys"         },
+    { EP_CAN_SMASH_EVERYTHING, "- can smash everything smashable"      },
+    { EP_CAN_EXPLODE,          "- can explode"                         },
+    { EP_CAN_EXPLODE_BY_FIRE,  "  - by fire or explosions"             },
+    { EP_CAN_EXPLODE_SMASHED,  "  - when smashed"                      },
+    { EP_CAN_EXPLODE_IMPACT,   "  - on impact"                         },
 
     { EP_DONT_RUN_INTO,                "- deadly when running into"            },
     { EP_DONT_COLLIDE_WITH,    "- deadly when colliding with"          },
@@ -4436,7 +4627,8 @@ static void DrawPropertiesAdvanced()
 
   /* draw drawing area gadgets */
   DrawCustomGraphicElementArea();
-  DrawCustomChangedArea();
+  DrawCustomChangeTargetArea();
+  DrawCustomChangeTriggerArea();
 }
 
 static void DrawElementName(int x, int y, int element)
@@ -5278,11 +5470,16 @@ static void HandleDrawingAreas(struct GadgetInfo *gi)
          custom_element.content[sx][sy] = new_element;
          element_info[properties_element] = custom_element;
        }
-       else if (id == GADGET_ID_CUSTOM_CHANGED)
+       else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
        {
          custom_element.change.successor = new_element;
          element_info[properties_element] = custom_element;
        }
+       else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
+       {
+         custom_element.change.trigger = new_element;
+         element_info[properties_element] = custom_element;
+       }
        else if (id == GADGET_ID_RANDOM_BACKGROUND)
          random_placement_background_element = new_element;
        else if (id >= GADGET_ID_ELEMENT_CONTENT_0 &&
@@ -5393,8 +5590,10 @@ static void HandleDrawingAreas(struct GadgetInfo *gi)
        PickDrawingElement(button, custom_element.gfx_element);
       else if (id == GADGET_ID_CUSTOM_CONTENT)
        PickDrawingElement(button, custom_element.content[sx][sy]);
-      else if (id == GADGET_ID_CUSTOM_CHANGED)
+      else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
        PickDrawingElement(button, custom_element.change.successor);
+      else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
+       PickDrawingElement(button, custom_element.change.trigger);
       else if (id == GADGET_ID_RANDOM_BACKGROUND)
        PickDrawingElement(button, random_placement_background_element);
       else if (id >= GADGET_ID_ELEMENT_CONTENT_0 &&
@@ -5483,7 +5682,6 @@ static void HandleSelectboxGadgets(struct GadgetInfo *gi)
 {
   int type_id = gi->custom_type_id;
 
-  *selectbox_info[type_id].index = gi->selectbox.index;
   *selectbox_info[type_id].value =
     selectbox_info[type_id].options[gi->selectbox.index].value;
 
@@ -6124,9 +6322,12 @@ static void HandleDrawingAreaInfo(struct GadgetInfo *gi)
     else if (id == GADGET_ID_CUSTOM_CONTENT)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "%s", getElementInfoText(custom_element.content[sx][sy]));
-    else if (id == GADGET_ID_CUSTOM_CHANGED)
+    else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "%s", getElementInfoText(custom_element.change.successor));
+    else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
+      DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
+               "%s", getElementInfoText(custom_element.change.trigger));
     else if (id == GADGET_ID_RANDOM_BACKGROUND)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "%s", getElementInfoText(random_placement_background_element));
@@ -6150,9 +6351,12 @@ static void HandleDrawingAreaInfo(struct GadgetInfo *gi)
     else if (id == GADGET_ID_CUSTOM_CONTENT)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "Custom element content position: %d, %d", sx, sy);
-    else if (id == GADGET_ID_CUSTOM_CHANGED)
+    else if (id == GADGET_ID_CUSTOM_CHANGE_TARGET)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "New element after change");
+    else if (id == GADGET_ID_CUSTOM_CHANGE_TRIGGER)
+      DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
+               "Other element triggering change");
     else if (id == GADGET_ID_RANDOM_BACKGROUND)
       DrawTextF(INFOTEXT_XPOS - SX, INFOTEXT_YPOS - SY, FONT_TEXT_2,
                "Random placement background");