Introduced new alias type TNodeHeight and set it to TNativeInt to fix…

… issue #1260.

Source/VirtualTrees.BaseTree.pas

@@ -757,7 +757,7 @@   TBaseVirtualTree = class abstract(TVTBaseAncestor)
     function GetFullyVisible(Node: PVirtualNode): Boolean;
     function GetHasChildren(Node: PVirtualNode): Boolean;
     function GetMultiline(Node: PVirtualNode): Boolean;
-    function GetNodeHeight(Node: PVirtualNode): TDimension;
+    function GetNodeHeight(Node: PVirtualNode): TNodeHeight;
     function GetNodeParent(Node: PVirtualNode): PVirtualNode;
     function GetOffsetXY: TPoint;
     function GetRootNodeCount: Cardinal;
@@ -814,7 +814,7 @@   TBaseVirtualTree = class abstract(TVTBaseAncestor)
     procedure SetMultiline(Node: PVirtualNode; const Value: Boolean);
     procedure SetNodeAlignment(const Value: TVTNodeAlignment);
     procedure SetNodeDataSize(Value: Integer);
-    procedure SetNodeHeight(Node: PVirtualNode; Value: TDimension);
+    procedure SetNodeHeight(Node: PVirtualNode; Value: TNodeHeight);
     procedure SetNodeParent(Node: PVirtualNode; const Value: PVirtualNode);
     procedure SetOffsetX(const Value: TDimension);
     procedure SetOffsetXY(const Value: TPoint);
@@ -1606,7 +1606,7 @@   TBaseVirtualTree = class abstract(TVTBaseAncestor)
     property IsFiltered[Node: PVirtualNode]: Boolean read GetFiltered write SetFiltered;
     property IsVisible[Node: PVirtualNode]: Boolean read GetVisible write SetVisible;
     property MultiLine[Node: PVirtualNode]: Boolean read GetMultiline write SetMultiline;
-    property NodeHeight[Node: PVirtualNode]: TDimension read GetNodeHeight write SetNodeHeight;
+    property NodeHeight[Node: PVirtualNode]: TNodeHeight read GetNodeHeight write SetNodeHeight;
     property NodeParent[Node: PVirtualNode]: PVirtualNode read GetNodeParent write SetNodeParent;
     property OffsetX: TDimension read FOffsetX write SetOffsetX;
     property OffsetXY: TPoint read GetOffsetXY write SetOffsetXY;
@@ -3289,7 +3289,7 @@ function TBaseVirtualTree.GetMultiline(Node: PVirtualNode): Boolean;
 
 //----------------------------------------------------------------------------------------------------------------------
 
-function TBaseVirtualTree.GetNodeHeight(Node: PVirtualNode): TDimension;
+function TBaseVirtualTree.GetNodeHeight(Node: PVirtualNode): TNodeHeight;
 
 begin
   if Assigned(Node) and (Node <> FRoot) then
@@ -4468,7 +4468,7 @@ procedure TBaseVirtualTree.SetChildCount(Node: PVirtualNode; NewChildCount: Card
   Index: Cardinal;
   Child: PVirtualNode;
   Count: Integer;
-  NewHeight: TDimension;
+  NewHeight: TNodeHeight;
 begin
   if not (toReadOnly in FOptions.MiscOptions) then
   begin
@@ -5052,7 +5052,7 @@ procedure TBaseVirtualTree.SetNodeDataSize(Value: Integer);
 
 //----------------------------------------------------------------------------------------------------------------------
 
-procedure TBaseVirtualTree.SetNodeHeight(Node: PVirtualNode; Value: TDimension);
+procedure TBaseVirtualTree.SetNodeHeight(Node: PVirtualNode; Value: TNodeHeight);
 
 var
   Difference: TDimension;

Source/VirtualTrees.Types.pas

@@ -127,14 +127,16 @@ interface
 {$IFDEF VT_FMX}
   TDimension = Single;
   PDimension = ^Single;
+  TNodeHeight = Single;
   TVTCursor = TCursor;
   TVTDragDataObject = TDragObject;
   TVTBackground = TBitmap;
   TVTPaintContext = TCanvas;
   TVTBrush = TBrush;
 {$ELSE}
-  TDimension = Integer; // For Firemonkey support, see #841
+  TDimension = Integer; // Introduced for Firemonkey support, see #841
   PDimension = ^Integer;
+  TNodeHeight = NativeInt;
   TVTCursor = HCURSOR;
   IDataObject= WinApi.ActiveX.IDataObject;
   TVTDragDataObject = IDataObject;
@@ -889,16 +891,15 @@   TScrollBarOptions = class(TPersistent)
   private
     fIndex: Cardinal;         // index of node with regard to its parent
     fChildCount: Cardinal;    // number of child nodes
-    fNodeHeight: TDimension;  // height in pixels
+    fNodeHeight: TNodeHeight;  // height in pixels
   public
     States: TVirtualNodeStates; // states describing various properties of the node (expanded, initialized etc.)
     Align: Byte;             // line/button alignment
     CheckState: TCheckState; // indicates the current check state (e.g. checked, pressed etc.)
     CheckType: TCheckType;   // indicates which check type shall be used for this node
     Dummy: Byte;             // dummy value to fill DWORD boundary
     TotalCount: Cardinal;    // sum of this node, all of its child nodes and their child nodes etc.
-    TotalHeight: TDimension; // height in pixels this node covers on screen including the height of all of its
-                             // children
+    TotalHeight: TNodeHeight;// height in pixels this node covers on screen including the height of all of its children.
     _Filler: TDWordFiller;   // Ensure 8 Byte alignment of following pointers for 64bit builds. Issue #1136
     // Note: Some copy routines require that all pointers (as well as the data area) in a node are
     //       located at the end of the node! Hence if you want to add new member fields (except pointers to internal
@@ -919,14 +920,14 @@   TScrollBarOptions = class(TPersistent)
     procedure SetLastChild(const pLastChild: PVirtualNode); inline; //internal method, do not call directly
     procedure SetIndex(const pIndex: Cardinal); inline;       //internal method, do not call directly.
     procedure SetChildCount(const pCount: Cardinal); inline; //internal method, do not call directly.
-    procedure SetNodeHeight(const pNodeHeight: TDimension); inline; //internal method, do not call directly.
+    procedure SetNodeHeight(const pNodeHeight: TNodeHeight); inline; //internal method, do not call directly.
     property Index: Cardinal read fIndex;
     property ChildCount: Cardinal read fChildCount;
     property Parent: PVirtualNode read fParent;
     property PrevSibling: PVirtualNode read fPrevSibling;
     property NextSibling: PVirtualNode read fNextSibling;
     property LastChild: PVirtualNode read fLastChild;
-    property NodeHeight: TDimension read fNodeHeight;
+    property NodeHeight: TNodeHeight read fNodeHeight;
   private
     Data: record end;        // this is a placeholder, each node gets extra data determined by NodeDataSize
   public
@@ -1153,7 +1154,7 @@ function TVirtualNode.IsAssigned: Boolean;
   Exit(@Self <> nil);
 end;
 
-procedure TVirtualNode.SetNodeHeight(const pNodeHeight: TDimension);
+procedure TVirtualNode.SetNodeHeight(const pNodeHeight: TNodeHeight);
 begin
   fNodeHeight := pNodeHeight;
 end;