Add placement preview support to recent tree (#689)

Author: mharis001

addons/placement/XEH_postInit.sqf

@@ -15,6 +15,20 @@
         IDC_RSCDISPLAYCURATOR_CREATE_UNITS_CIV,
         IDC_RSCDISPLAYCURATOR_CREATE_UNITS_EMPTY
     ];
+
+    // Need special handling for recent tree since items in the tree are not always objects
+    private _ctrlTreeRecent = _display displayCtrl IDC_RSCDISPLAYCURATOR_CREATE_RECENT;
+    _ctrlTreeRecent ctrlAddEventHandler ["TreeSelChanged", {
+        params ["_ctrlTreeRecent", "_selectedPath"];
+
+        private _objectType = _ctrlTreeRecent tvData _selectedPath;
+
+        if (!isClass (configFile >> "CfgVehicles" >> _objectType)) then {
+            _objectType = "";
+        };
+
+        [_objectType] call FUNC(setupPreview);
+    }];
 }] call CBA_fnc_addEventHandler;
 
 ["zen_curatorDisplayUnloaded", {

addons/placement/functions/fnc_handleTreeChange.sqf

@@ -6,26 +6,31 @@
  * Arguments:
  * 0: Display <DISPLAY>
  * 1: Mode <NUMBER>
- * 2: Side <NUMBER>
  *
  * Return Value:
  * None
  *
  * Example:
- * [DISPLAY, 0, 0] call zen_placement_fnc_handleTreeChange
+ * [DISPLAY, 0] call zen_placement_fnc_handleTreeChange
  *
  * Public: No
  */
 
 if (!GVAR(enabled)) exitWith {};
 
-params ["_display", "_mode", "_side"];
+params ["_display", "_mode"];
 
 // Setup the preview with if object placement is active
 // Otherwise delete the current preview
-private _objectType = if (_mode == 0 && {call EFUNC(common,isPlacementActive)}) then {
+private _objectType = if (_mode in [0, 4] && {call EFUNC(common,isPlacementActive)}) then {
     private _ctrlTree = call EFUNC(common,getActiveTree);
-    _ctrlTree tvData tvCurSel _ctrlTree
+    private _data = _ctrlTree tvData tvCurSel _ctrlTree;
+
+    if (_mode == 4 && {!isClass (configFile >> "CfgVehicles" >> _data)}) then {
+        _data = "";
+    };
+
+    _data
 } else {
     ""
 };