Oto schemat dla okna dialogowego Delphi 7 Vista/Win7 (i jednostki, która go wywołuje). Próbowałem zduplikować zdarzenia TOpenDialog (np. OnCanClose). Definicje typów nie są zawarte w komponencie, ale można je znaleźć w niektórych nowszych jednostkach ShlObj i ActiveX w sieci.
Wystąpił problem podczas próby przekonwertowania starego stylu ciągu filtrów na tablicę FileTypes (patrz poniżej). Na razie możesz ustawić tablicę FileTypes, jak pokazano. Pomocy w kwestii konwersji filtra lub innych ulepszeń są mile widziane.
Oto kod:
{Example of using the TWin7FileDialog delphi component to access the
Vista/Win7 File Dialog AND handle basic events.}
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Win7FileDialog;
type
TForm1 = class(TForm)
btnOpenFile: TButton;
btnSaveFile: TButton;
procedure btnOpenFileClick(Sender: TObject);
procedure btnSaveFileClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
procedure DoDialogCanClose(Sender: TObject; var CanClose: Boolean);
procedure DoDialogFolderChange(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{Using the dialog to open a file}
procedure TForm1.btnOpenFileClick(Sender: TObject);
var
i: integer;
aOpenDialog: TWin7FileDialog;
aFileTypesArray: TComdlgFilterSpecArray;
begin
aOpenDialog:=TWin7FileDialog.Create(Owner);
aOpenDialog.Title:='My Win 7 Open Dialog';
aOpenDialog.DialogType:=dtOpen;
aOpenDialog.OKButtonLabel:='Open';
aOpenDialog.DefaultExt:='pas';
aOpenDialog.InitialDir:='c:\program files\borland\delphi7\source';
aOpenDialog.Options:=[fosPathMustExist, fosFileMustExist];
//aOpenDialog.Filter := 'Text files (*.txt)|*.TXT|
Pascal files (*.pas)|*.PAS|All Files (*.*)|*.*';
// Create an array of file types
SetLength(aFileTypesArray,3);
aFileTypesArray[0].pszName:=PWideChar(WideString('Text Files (*.txt)'));
aFileTypesArray[0].pszSpec:=PWideChar(WideString('*.txt'));
aFileTypesArray[1].pszName:=PWideChar(WideString('Pascal Files (*.pas)'));
aFileTypesArray[1].pszSpec:=PWideChar(WideString('*.pas'));
aFileTypesArray[2].pszName:=PWideChar(WideString('All Files (*.*)'));
aFileTypesArray[2].pszSpec:=PWideChar(WideString('*.*'));
aOpenDialog.FilterArray:=aFileTypesArray;
aOpenDialog.FilterIndex:=1;
aOpenDialog.OnCanClose:=DoDialogCanClose;
aOpenDialog.OnFolderChange:=DoDialogFolderChange;
if aOpenDialog.Execute then
begin
showMessage(aOpenDialog.Filename);
end;
end;
{Example of using the OnCanClose event}
procedure TForm1.DoDialogCanClose(Sender: TObject;
var CanClose: Boolean);
begin
if UpperCase(ExtractFilename(TWin7FileDialog(Sender).Filename))=
'TEMPLATE.SSN' then
begin
MessageDlg('The Template.ssn filename is reserved for use by the system.',
mtInformation, [mbOK], 0);
CanClose:=False;
end
else
begin
CanClose:=True;
end;
end;
{Helper function to get path from ShellItem}
function PathFromShellItem(aShellItem: IShellItem): string;
var
hr: HRESULT;
aPath: PWideChar;
begin
hr:=aShellItem.GetDisplayName(SIGDN_FILESYSPATH,aPath);
if hr = 0 then
begin
Result:=aPath;
end
else
Result:='';
end;
{Example of handling a folder change}
procedure TForm1.DoDialogFolderChange(Sender: TObject);
var
aShellItem: IShellItem;
hr: HRESULT;
aFilename: PWideChar;
begin
hr:=TWin7FileDialog(Sender).FileDialog.GetFolder(aShellItem);
if hr = 0 then
begin
// showmessage(PathFromShellItem(aShellItem));
end;
end;
{Using the dialog to save a file}
procedure TForm1.btnSaveFileClick(Sender: TObject);
var
aSaveDialog: TWin7FileDialog;
aFileTypesArray: TComdlgFilterSpecArray;
begin
aSaveDialog:=TWin7FileDialog.Create(Owner);
aSaveDialog.Title:='My Win 7 Save Dialog';
aSaveDialog.DialogType:=dtSave;
aSaveDialog.OKButtonLabel:='Save';
aSaveDialog.DefaultExt:='pas';
aSaveDialog.InitialDir:='c:\program files\borland\delphi7\source';
aSaveDialog.Options:=[fosNoReadOnlyReturn, fosOverwritePrompt];
//aSaveDialog.Filter := 'Text files (*.txt)|*.TXT|
Pascal files (*.pas)|*.PAS';
{Create an array of file types}
SetLength(aFileTypesArray,3);
aFileTypesArray[0].pszName:=PWideChar(WideString('Text Files (*.txt)'));
aFileTypesArray[0].pszSpec:=PWideChar(WideString('*.txt'));
aFileTypesArray[1].pszName:=PWideChar(WideString('Pascal Files (*.pas)'));
aFileTypesArray[1].pszSpec:=PWideChar(WideString('*.pas'));
aFileTypesArray[2].pszName:=PWideChar(WideString('All Files (*.*)'));
aFileTypesArray[2].pszSpec:=PWideChar(WideString('*.*'));
aSaveDialog.FilterArray:=aFileTypesArray;
aSaveDialog.OnCanClose:=DoDialogCanClose;
aSaveDialog.OnFolderChange:=DoDialogFolderChange;
if aSaveDialog.Execute then
begin
showMessage(aSaveDialog.Filename);
end;
end;
end.
{A sample delphi 7 component to access the
Vista/Win7 File Dialog AND handle basic events.}
unit Win7FileDialog;
interface
uses
SysUtils, Classes, Forms, Dialogs, Windows,DesignIntf, ShlObj,
ActiveX, CommDlg;
{Search the internet for new ShlObj and ActiveX units to get necessary
type declarations for IFileDialog, etc.. These interfaces can otherwise
be embedded into this component.}
Type
TOpenOption = (fosOverwritePrompt,
fosStrictFileTypes,
fosNoChangeDir,
fosPickFolders,
fosForceFileSystem,
fosAllNonStorageItems,
fosNoValidate,
fosAllowMultiSelect,
fosPathMustExist,
fosFileMustExist,
fosCreatePrompt,
fosShareAware,
fosNoReadOnlyReturn,
fosNoTestFileCreate,
fosHideMRUPlaces,
fosHidePinnedPlaces,
fosNoDereferenceLinks,
fosDontAddToRecent,
fosForceShowHidden,
fosDefaultNoMiniMode,
fosForcePreviewPaneOn);
TOpenOptions = set of TOpenOption;
type
TDialogType = (dtOpen,dtSave);
type
TWin7FileDialog = class(TOpenDialog)
private
{ Private declarations }
FOptions: TOpenOptions;
FDialogType: TDialogType;
FOKButtonLabel: string;
FFilterArray: TComdlgFilterSpecArray;
procedure SetOKButtonLabel(const Value: string);
protected
{ Protected declarations }
function CanClose(Filename:TFilename): Boolean;
function DoExecute: Bool;
public
{ Public declarations }
FileDialog: IFileDialog;
FileDialogCustomize: IFileDialogCustomize;
FileDialogEvents: IFileDialogEvents;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function Execute: Boolean; override;
published
{ Published declarations }
property DefaultExt;
property DialogType: TDialogType read FDialogType write FDialogType
default dtOpen;
property FileName;
property Filter;
property FilterArray: TComdlgFilterSpecArray read fFilterArray
write fFilterArray;
property FilterIndex;
property InitialDir;
property Options: TOpenOptions read FOptions write FOptions
default [fosNoReadOnlyReturn, fosOverwritePrompt];
property Title;
property OKButtonLabel: string read fOKButtonLabel write SetOKButtonLabel;
property OnCanClose;
property OnFolderChange;
property OnSelectionChange;
property OnTypeChange;
property OnClose;
property OnShow;
// property OnIncludeItem;
end;
TFileDialogEvent = class(TInterfacedObject, IFileDialogEvents,
IFileDialogControlEvents)
private
{ Private declarations }
// 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,
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;
public
{ Public declarations }
ParentDialog: TWin7FileDialog;
end;
procedure Register;
implementation
constructor TWin7FileDialog.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
end;
destructor TWin7FileDialog.Destroy;
begin
inherited Destroy;
end;
procedure TWin7FileDialog.SetOKButtonLabel(const Value: string);
begin
if Value<>fOKButtonLabel then
begin
fOKButtonLabel := Value;
end;
end;
function TWin7FileDialog.CanClose(Filename: TFilename): Boolean;
begin
Result := DoCanClose;
end;
{Helper function to get path from ShellItem}
function PathFromShellItem(aShellItem: IShellItem): string;
var
hr: HRESULT;
aPath: PWideChar;
begin
hr:=aShellItem.GetDisplayName(SIGDN_FILESYSPATH,aPath);
if hr = 0 then
begin
Result:=aPath;
end
else
Result:='';
end;
function TFileDialogEvent.OnFileOk(const pfd: IFileDialog): HResult; stdcall
var
aShellItem: IShellItem;
hr: HRESULT;
aFilename: PWideChar;
begin
{Get selected filename and check CanClose}
aShellItem:=nil;
hr:=pfd.GetResult(aShellItem);
if hr = 0 then
begin
hr:=aShellItem.GetDisplayName(SIGDN_FILESYSPATH,aFilename);
if hr = 0 then
begin
ParentDialog.Filename:=aFilename;
if not ParentDialog.CanClose(aFilename) then
begin
result := s_FALSE;
Exit;
end;
end;
end;
result := s_OK;
end;
function TFileDialogEvent.OnFolderChanging(const pfd: IFileDialog;
const psiFolder: IShellItem): HResult; stdcall
begin
{Not currently handled}
result := s_OK;
end;
function TFileDialogEvent.OnFolderChange(const pfd: IFileDialog):
HResult; stdcall
begin
ParentDialog.DoFolderChange;
result := s_OK;
end;
function TFileDialogEvent.OnSelectionChange(const pfd: IFileDialog):
HResult; stdcall
begin
ParentDialog.DoSelectionChange;
result := s_OK;
end;
function TFileDialogEvent.OnShareViolation(const pfd: IFileDialog;
const psi: IShellItem;out pResponse: DWORD): HResult; stdcall
begin
{Not currently handled}
result := s_OK;
end;
function TFileDialogEvent.OnTypeChange(const pfd: IFileDialog):
HResult; stdcall;
begin
ParentDialog.DoTypeChange;
result := s_OK;
end;
function TFileDialogEvent.OnOverwrite(const pfd: IFileDialog;
const psi: IShellItem;out pResponse: DWORD): HResult; stdcall;
begin
{Not currently handled}
result := s_OK;
end;
function TFileDialogEvent.OnItemSelected(const pfdc: IFileDialogCustomize;
dwIDCtl,dwIDItem: DWORD): HResult; stdcall;
begin
{Not currently handled}
// Form1.Caption := Format('%d:%d', [dwIDCtl, dwIDItem]);
result := s_OK;
end;
function TFileDialogEvent.OnButtonClicked(const pfdc: IFileDialogCustomize;
dwIDCtl: DWORD): HResult; stdcall;
begin
{Not currently handled}
result := s_OK;
end;
function TFileDialogEvent.OnCheckButtonToggled(const pfdc: IFileDialogCustomize;
dwIDCtl: DWORD; bChecked: BOOL): HResult; stdcall;
begin
{Not currently handled}
result := s_OK;
end;
function TFileDialogEvent.OnControlActivating(const pfdc: IFileDialogCustomize;
dwIDCtl: DWORD): HResult; stdcall;
begin
{Not currently handled}
result := s_OK;
end;
procedure ParseDelimited(const sl : TStrings; const value : string;
const delimiter : string) ;
var
dx : integer;
ns : string;
txt : string;
delta : integer;
begin
delta := Length(delimiter) ;
txt := value + delimiter;
sl.BeginUpdate;
sl.Clear;
try
while Length(txt) > 0 do
begin
dx := Pos(delimiter, txt) ;
ns := Copy(txt,0,dx-1) ;
sl.Add(ns) ;
txt := Copy(txt,dx+delta,MaxInt) ;
end;
finally
sl.EndUpdate;
end;
end;
//function TWin7FileDialog.DoExecute(Func: Pointer): Bool;
function TWin7FileDialog.DoExecute: Bool;
var
aFileDialogEvent: TFileDialogEvent;
aCookie: cardinal;
aWideString: WideString;
aFilename: PWideChar;
hr: HRESULT;
aShellItem: IShellItem;
aShellItemFilter: IShellItemFilter;
aComdlgFilterSpec: TComdlgFilterSpec;
aComdlgFilterSpecArray: TComdlgFilterSpecArray;
i: integer;
aStringList: TStringList;
aFileTypesCount: integer;
aFileTypesArray: TComdlgFilterSpecArray;
aOptionsSet: Cardinal;
begin
if DialogType = dtSave then
begin
CoCreateInstance(CLSID_FileSaveDialog, nil, CLSCTX_INPROC_SERVER,
IFileSaveDialog, FileDialog);
end
else
begin
CoCreateInstance(CLSID_FileOpenDialog, nil, CLSCTX_INPROC_SERVER,
IFileOpenDialog, FileDialog);
end;
// FileDialog.QueryInterface(
// StringToGUID('{8016B7B3-3D49-4504-A0AA-2A37494E606F}'),
// FileDialogCustomize);
// FileDialogCustomize.AddText(1000, 'My first Test');
{Set Initial Directory}
aWideString:=InitialDir;
aShellItem:=nil;
hr:=SHCreateItemFromParsingName(PWideChar(aWideString), nil,
StringToGUID(SID_IShellItem), aShellItem);
FileDialog.SetFolder(aShellItem);
{Set Title}
aWideString:=Title;
FileDialog.SetTitle(PWideChar(aWideString));
{Set Options}
aOptionsSet:=0;
if fosOverwritePrompt in Options then aOptionsSet:=
aOptionsSet + FOS_OVERWRITEPROMPT;
if fosStrictFileTypes in Options then aOptionsSet:=
aOptionsSet + FOS_STRICTFILETYPES;
if fosNoChangeDir in Options then aOptionsSet:=
aOptionsSet + FOS_NOCHANGEDIR;
if fosPickFolders in Options then aOptionsSet:=
aOptionsSet + FOS_PICKFOLDERS;
if fosForceFileSystem in Options then aOptionsSet:=
aOptionsSet + FOS_FORCEFILESYSTEM;
if fosAllNonStorageItems in Options then aOptionsSet:=
aOptionsSet + FOS_ALLNONSTORAGEITEMS;
if fosNoValidate in Options then aOptionsSet:=
aOptionsSet + FOS_NOVALIDATE;
if fosAllowMultiSelect in Options then aOptionsSet:=
aOptionsSet + FOS_ALLOWMULTISELECT;
if fosPathMustExist in Options then aOptionsSet:=
aOptionsSet + FOS_PATHMUSTEXIST;
if fosFileMustExist in Options then aOptionsSet:=
aOptionsSet + FOS_FILEMUSTEXIST;
if fosCreatePrompt in Options then aOptionsSet:=
aOptionsSet + FOS_CREATEPROMPT;
if fosShareAware in Options then aOptionsSet:=
aOptionsSet + FOS_SHAREAWARE;
if fosNoReadOnlyReturn in Options then aOptionsSet:=
aOptionsSet + FOS_NOREADONLYRETURN;
if fosNoTestFileCreate in Options then aOptionsSet:=
aOptionsSet + FOS_NOTESTFILECREATE;
if fosHideMRUPlaces in Options then aOptionsSet:=
aOptionsSet + FOS_HIDEMRUPLACES;
if fosHidePinnedPlaces in Options then aOptionsSet:=
aOptionsSet + FOS_HIDEPINNEDPLACES;
if fosNoDereferenceLinks in Options then aOptionsSet:=
aOptionsSet + FOS_NODEREFERENCELINKS;
if fosDontAddToRecent in Options then aOptionsSet:=
aOptionsSet + FOS_DONTADDTORECENT;
if fosForceShowHidden in Options then aOptionsSet:=
aOptionsSet + FOS_FORCESHOWHIDDEN;
if fosDefaultNoMiniMode in Options then aOptionsSet:=
aOptionsSet + FOS_DEFAULTNOMINIMODE;
if fosForcePreviewPaneOn in Options then aOptionsSet:=
aOptionsSet + FOS_FORCEPREVIEWPANEON;
FileDialog.SetOptions(aOptionsSet);
{Set OKButtonLabel}
aWideString:=OKButtonLabel;
FileDialog.SetOkButtonLabel(PWideChar(aWideString));
{Set Default Extension}
aWideString:=DefaultExt;
FileDialog.SetDefaultExtension(PWideChar(aWideString));
{Set Default Filename}
aWideString:=FileName;
FileDialog.SetFilename(PWideChar(aWideString));
{Note: Attempting below to automatically parse an old style filter string into
the newer FileType array; however the below code overwrites memory when the
stringlist item is typecast to PWideChar and assigned to an element of the
FileTypes array. What's the correct way to do this??}
{Set FileTypes (either from Filter or FilterArray)}
if length(Filter)>0 then
begin
{
aStringList:=TStringList.Create;
try
ParseDelimited(aStringList,Filter,'|');
aFileTypesCount:=Trunc(aStringList.Count/2)-1;
i:=0;
While i <= aStringList.Count-1 do
begin
SetLength(aFileTypesArray,Length(aFileTypesArray)+1);
aFileTypesArray[Length(aFileTypesArray)-1].pszName:=
PWideChar(WideString(aStringList[i]));
aFileTypesArray[Length(aFileTypesArray)-1].pszSpec:=
PWideChar(WideString(aStringList[i+1]));
Inc(i,2);
end;
FileDialog.SetFileTypes(length(aFileTypesArray),aFileTypesArray);
finally
aStringList.Free;
end;
}
end
else
begin
FileDialog.SetFileTypes(length(FilterArray),FilterArray);
end;
{Set FileType (filter) index}
FileDialog.SetFileTypeIndex(FilterIndex);
aFileDialogEvent:=TFileDialogEvent.Create;
aFileDialogEvent.ParentDialog:=self;
aFileDialogEvent.QueryInterface(IFileDialogEvents,FileDialogEvents);
FileDialog.Advise(aFileDialogEvent,aCookie);
hr:=FileDialog.Show(Application.Handle);
if hr = 0 then
begin
aShellItem:=nil;
hr:=FileDialog.GetResult(aShellItem);
if hr = 0 then
begin
hr:=aShellItem.GetDisplayName(SIGDN_FILESYSPATH,aFilename);
if hr = 0 then
begin
Filename:=aFilename;
end;
end;
Result:=true;
end
else
begin
Result:=false;
end;
FileDialog.Unadvise(aCookie);
end;
function TWin7FileDialog.Execute: Boolean;
begin
Result := DoExecute;
end;
procedure Register;
begin
RegisterComponents('Dialogs', [TWin7FileDialog]);
end;
end.
Dzięki. W oparciu o twoją pierwotną sugestię i inne posty, utknąłem razem komponent, który będzie symulował oryginalne właściwości i zdarzenia TOpenDialog i TSaveDialog. Podobnie jak Ty, odziedziczyłem po TOpenDialog, aby przyspieszyć działanie. Wkrótce opublikuję kod mojego komponentu ... – JeffR