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SelectDialog.pas
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SelectDialog.pas
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unit SelectDialog;
interface
uses
System.SysUtils, FMX.Types, System.Classes, System.Generics.Collections, IOUtils,
WinAPI.Windows, WinAPI.ShlObj, WinAPI.ActiveX, FMX.Platform.Win;
function SelectDirsAndFiles(handle: TWindowHandle; const TitleName, ButtonName: string): TDictionary<String, Boolean>;
function IUnknown_QueryService(punkSite: IUnknown; const SID, IID: TGUID; out Obj): HResult; stdcall;
{$EXTERNALSYM IUnknown_QueryService}
implementation
type
TMyFileDialogEvents = class(TInterfacedObject, IFileDialogEvents, IFileDialogControlEvents)
public
{ IFileDialogEvents }
function OnFileOk(const pfd: IFileDialog): HResult; stdcall;
function OnFolderChanging(const pfd: IFileDialog; const psiFolder: IShellItem): HResult; stdcall;
function OnFolderChange(const pfd: IFileDialog): HResult; stdcall;
function OnSelectionChange(const pfd: IFileDialog): HResult; stdcall;
function OnShareViolation(const pfd: IFileDialog; const psi: IShellItem; out pResponse: DWORD): HResult; stdcall;
function OnTypeChange(const pfd: IFileDialog): HResult; stdcall;
function OnOverwrite(const pfd: IFileDialog; const psi: IShellItem; out pResponse: DWORD): HResult; stdcall;
{ IFileDialogControlEvents }
function OnItemSelected(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD; dwIDItem: DWORD): HResult; stdcall;
function OnButtonClicked(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD): HResult; stdcall;
function OnCheckButtonToggled(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD; bChecked: BOOL): HResult; stdcall;
function OnControlActivating(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD): HResult; stdcall;
end;
function IUnknown_QueryService; external 'shlwapi.dll' name 'IUnknown_QueryService';
const
dwOpenButtonID: DWORD = 1900;
var
SelectPaths: TDictionary<String, Boolean>;
function GetListFromShell(punk: IUnknown): Boolean;
begin
var
pfv: IFolderView2;
var
hr := IUnknown_QueryService(punk, SID_SFolderView, IFolderView2, pfv);
if hr = S_OK then
begin
var
IResults: IShellItemArray;
hr := pfv.GetSelection(true, IResults);
if hr = S_OK then
begin
var
count: Cardinal;
IResults.GetCount(count);
if count > 0 then
begin
for var i := 0 to count - 1 do
begin
var
IResult: IShellItem;
IResults.GetItemAt(i, IResult);
var
FileName: PChar;
IResult.GetDisplayName(SIGDN_FILESYSPATH, FileName);
SelectPaths.Add(FileName, TDirectory.Exists(FileName));
end;
Result := true;
Exit;
end;
end;
end;
Result := false;
end;
function TMyFileDialogEvents.OnFileOk(const pfd: IFileDialog): HResult;
begin
if GetListFromShell(pfd) then
begin
Result := S_OK;
end
else
begin
Result := E_NOTIMPL;
end;
end;
function TMyFileDialogEvents.OnFolderChange(const pfd: IFileDialog): HResult;
begin
var
pWindow: IOleWindow;
var
hr := pfd.QueryInterface(IOleWindow, pWindow);
if hr = S_OK then
begin
var
hwndDialog: HWND;
hr := pWindow.GetWindow(&hwndDialog);
if hr = S_OK then
begin
var
openButton := GetDlgItem(hwndDialog, IDOK);
ShowWindow(openButton, SW_HIDE);
end;
end;
Result := S_OK;
end;
function TMyFileDialogEvents.OnFolderChanging(const pfd: IFileDialog; const psiFolder: IShellItem): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnOverwrite(const pfd: IFileDialog; const psi: IShellItem; out pResponse: DWORD): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnSelectionChange(const pfd: IFileDialog): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnShareViolation(const pfd: IFileDialog; const psi: IShellItem;
out pResponse: DWORD): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnTypeChange(const pfd: IFileDialog): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnItemSelected(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD; dwIDItem: DWORD): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnButtonClicked(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD): HResult;
begin
if dwIDCtl = dwOpenButtonID then
begin
if GetListFromShell(pfdc) then
begin
var
FileDialog: IFileDialog;
pfdc.QueryInterface(IFileDialog, FileDialog);
FileDialog.Close(S_OK);
Result := S_OK;
Exit;
end;
end;
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnCheckButtonToggled(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD;
bChecked: BOOL): HResult;
begin
Result := E_NOTIMPL;
end;
function TMyFileDialogEvents.OnControlActivating(const pfdc: IFileDialogCustomize; dwIDCtl: DWORD): HResult;
begin
Result := E_NOTIMPL;
end;
function SelectDirsAndFiles(handle: TWindowHandle; const TitleName, ButtonName: string): TDictionary<String, Boolean>;
begin
if Win32MajorVersion >= 6 then
begin
var
FileDialog: IFileOpenDialog;
CoCreateInstance(CLSID_FileOpenDialog, nil, CLSCTX_INPROC_SERVER, IFileOpenDialog, FileDialog);
var
cookie: DWORD;
var
MyFileDialogEvents := TMyFileDialogEvents.Create;
FileDialog.Advise(MyFileDialogEvents, cookie);
FileDialog.SetOptions(FOS_ALLOWMULTISELECT or FOS_FORCEFILESYSTEM);
var
FileDialogCustomize: IFileDialogCustomize;
FileDialog.QueryInterface(IFileDialogCustomize, FileDialogCustomize);
FileDialogCustomize.AddPushButton(dwOpenButtonID, PChar(ButtonName));
FileDialog.SetTitle(PChar(TitleName));
Result := TDictionary<String, Boolean>.Create;
SelectPaths := Result;
FileDialog.Show(FmxHandleToHwnd(handle));
SelectPaths := nil;
FileDialog.Unadvise(cookie);
end;
end;
end.