Очистка компонента осуществлялась вызовом функции
SendMessage(hwnd, TVM_DELETEITEM, 0, Longint(TVI_ROOT)).
*)
interface
uses SysUtils, Windows, Messages, Classes, Graphics, Controls, Forms, Dialogs, ComCtrls, CommCtrl, tree2vw;
type THETreeView = class(TTreeView)
private
FSortType: TSortType;
procedure SetSortType(Value: TSortType);
protected
function GetItemText(ANode: TTreeNode): string;
public
constructor Create(AOwner: TComponent); override;
function AlphaSort: Boolean;
function CustomSort(SortProc: TTVCompare; Data: Longint): Boolean;
procedure LoadFromFile(const AFileName: string);
procedure SaveToFile(const AFileName: string);
procedure GetItemList(AList: TStrings);
procedure SetItemList(AList: TStrings);
//Жирное начертание шрифта 'Bold' должно быть свойством TTreeNode, но...
function IsItemBold(ANode: TTreeNode): Boolean;
procedure SetItemBold(ANode: TTreeNode; Value: Boolean);
published
property SortType: TSortType read FSortType write SetSortType default stNone;
end;
procedure Register;
implementation
function DefaultTreeViewSort(Node1, Node2: TTreeNode; lParam: Integer): Integer; stdcall;
begin
{with Node1 do
if Assigned(TreeView.OnCompare) then
TreeView.OnCompare(Node1.TreeView, Node1, Node2, lParam, Result)
else}
Result:= lstrcmp(PChar(Node1.Text), PChar(Node2.Text));
end;
constructor THETreeView.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FSortType:= stNone;
end;
procedure THETreeView.SetItemBold(ANode: TTreeNode; Value: Boolean);
var
Item: TTVItem; Template: Integer;
begin
if ANode = nil then Exit;
if Value then Template:= -1 else Template:= 0;
with Item do begin
mask:= TVIF_STATE;
hItem:= ANode.ItemId;
stateMask:= TVIS_BOLD;
state:= stateMask and template;
end;
TreeView_SetItem(Handle, Item);
end;
function THETreeView.IsItemBold(ANode: TTreeNode): Boolean;
var
Item: TTVItem;
begin
Result:= False;
if ANode = nil then Exit;
with Item do begin
mask:= TVIF_STATE;
hItem:= ANode.ItemId;
if TreeView_GetItem(Handle, Item) then Result:= (state and TVIS_BOLD) <> 0;
end;
end;
procedure THETreeView.SetSortType(Value: TSortType);
begin
if SortType <> Value then begin
FSortType:= Value;
if ((SortType in [stData, stBoth]) and Assigned(OnCompare)) or (SortType in [stText, stBoth]) then AlphaSort;
end;
end;
procedure THETreeView.LoadFromFile(const AFileName: string);
var
AList: TStringList;
begin
AList:= TStringList.Create;
Items.BeginUpdate;
try
AList.LoadFromFile(AFileName);
SetItemList(AList);
finally
Items.EndUpdate;
AList.Free;
end;
end;
procedure THETreeView.SaveToFile(const AFileName: string);
var
AList: TStringList;
