dialog.pas

考勤管理是企业内部管理的重要环节和基础

unit Dialog;

{$R-}

interface

uses Windows, Messages, SysUtils, CommDlg, Classes, Graphics, Controls,
  Forms, StdCtrls;

resourcestring
  sYes= '是(&Y)';
  sNo= '否(&N)';
  sOK= '确定(&O)';
  sAbort='中止(&A)';
  sCancel='取消(&C)';
  sRetry= '重试(&R)';
  sIgnore= '忽略(&I)';
  sAll='所有的(&L)';
  sHelp='帮助(&H)';
  sWarning='警告';
  sError='错误';
  sInformation='提示信息';
  sConfrim='确认';

const

{ Maximum number of custom colors in color dialog }

  MaxCustomColors = 16;

type

{ TCommonDialog }

  TCommonDialog = class(TComponent)
  private
    FCtl3D: Boolean;
    FDefWndProc: Pointer;
    FHelpContext: THelpContext;
    FHandle: HWnd;
    FObjectInstance: Pointer;
    FTemplate: PChar;
    FOnClose: TNotifyEvent;
    FOnShow: TNotifyEvent;
    procedure WMDestroy(var Message: TWMDestroy); message WM_DESTROY;
    procedure WMInitDialog(var Message: TWMInitDialog); message WM_INITDIALOG;
    procedure WMNCDestroy(var Message: TWMNCDestroy); message WM_NCDESTROY;
    procedure MainWndProc(var Message: TMessage);
  protected
    procedure DoClose; dynamic;
    procedure DoShow; dynamic;
    procedure WndProc(var Message: TMessage); virtual;
    function MessageHook(var Msg: TMessage): Boolean; virtual;
    function TaskModalDialog(DialogFunc: Pointer; var DialogData): Bool; virtual;
    function Execute: Boolean; virtual; abstract;
    property Template: PChar read FTemplate write FTemplate;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DefaultHandler(var Message); override;
    property Handle: HWnd read FHandle;
  published
    property Ctl3D: Boolean read FCtl3D write FCtl3D default True;
    property HelpContext: THelpContext read FHelpContext write FHelpContext default 0;
    property OnClose: TNotifyEvent read FOnClose write FOnClose;
    property OnShow: TNotifyEvent read FOnShow write FOnShow;
  end;

{ TOpenDialog }

  TOpenOption = (ofReadOnly, ofOverwritePrompt, ofHideReadOnly,
    ofNoChangeDir, ofShowHelp, ofNoValidate, ofAllowMultiSelect,
    ofExtensionDifferent, ofPathMustExist, ofFileMustExist, ofCreatePrompt,
    ofShareAware, ofNoReadOnlyReturn, ofNoTestFileCreate, ofNoNetworkButton,
    ofNoLongNames, ofOldStyleDialog, ofNoDereferenceLinks, ofEnableIncludeNotify,
    ofEnableSizing);
  TOpenOptions = set of TOpenOption;

  TFileEditStyle = (fsEdit, fsComboBox);

  TOpenDialog = class(TCommonDialog)
  private
    FHistoryList: TStrings;
    FOptions: TOpenOptions;
    FFilter: string;
    FFilterIndex: Integer;
    FCurrentFilterIndex: Integer;
    FInitialDir: string;
    FTitle: string;
    FDefaultExt: string;
    FFileName: TFileName;
    FFiles: TStrings;
    FFileEditStyle: TFileEditStyle;
    FOnSelectionChange: TNotifyEvent;
    FOnFolderChange: TNotifyEvent;
    FOnTypeChange: TNotifyEvent;
    FOnCanClose: TCloseQueryEvent;
    function GetFileName: TFileName;
    function GetFilterIndex: Integer;
    procedure ReadFileEditStyle(Reader: TReader);
    procedure SetHistoryList(Value: TStrings);
    procedure SetInitialDir(const Value: string);
  protected
    function CanClose(var OpenFileName: TOpenFileName): Boolean;
    function DoCanClose: Boolean; dynamic;
    function DoExecute(Func: Pointer): Bool;
    procedure DoSelectionChange; dynamic;
    procedure DoFolderChange; dynamic;
    procedure DoTypeChange; dynamic;
    procedure DefineProperties(Filer: TFiler); override;
    procedure GetFileNames(var OpenFileName: TOpenFileName);
    function GetStaticRect: TRect; virtual;
    procedure WndProc(var Message: TMessage); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function Execute: Boolean; override;
    property FileEditStyle: TFileEditStyle read FFileEditStyle write FFileEditStyle;
    property Files: TStrings read FFiles;
    property HistoryList: TStrings read FHistoryList write SetHistoryList;
  published
    property DefaultExt: string read FDefaultExt write FDefaultExt;
    property FileName: TFileName read GetFileName write FFileName;
    property Filter: string read FFilter write FFilter;
    property FilterIndex: Integer read GetFilterIndex write FFilterIndex default 1;
    property InitialDir: string read FInitialDir write SetInitialDir;
    property Options: TOpenOptions read FOptions write FOptions default [ofHideReadOnly, ofEnableSizing];
    property Title: string read FTitle write FTitle;
    property OnCanClose: TCloseQueryEvent read FOnCanClose write FOnCanClose;
    property OnFolderChange: TNotifyEvent read FOnFolderChange write FOnFolderChange;
    property OnSelectionChange: TNotifyEvent read FOnSelectionChange write FOnSelectionChange;
    property OnTypeChange: TNotifyEvent read FOnTypeChange write FOnTypeChange;
  end;

{ TSaveDialog }

  TSaveDialog = class(TOpenDialog)
    function Execute: Boolean; override;
  end;

{ TColorDialog }

  TColorDialogOption = (cdFullOpen, cdPreventFullOpen, cdShowHelp,
    cdSolidColor, cdAnyColor);
  TColorDialogOptions = set of TColorDialogOption;

  TCustomColors = array[0..MaxCustomColors - 1] of Longint;

  TColorDialog = class(TCommonDialog)
  private
    FColor: TColor;
    FOptions: TColorDialogOptions;
    FCustomColors: TStrings;
    procedure SetCustomColors(Value: TStrings);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function Execute: Boolean; override;
  published
    property Color: TColor read FColor write FColor default clBlack;
    property Ctl3D default False;
    property CustomColors: TStrings read FCustomColors write SetCustomColors;
    property Options: TColorDialogOptions read FOptions write FOptions default [];
  end;

{ TFontDialog }

  TFontDialogOption = (fdAnsiOnly, fdTrueTypeOnly, fdEffects,
    fdFixedPitchOnly, fdForceFontExist, fdNoFaceSel, fdNoOEMFonts,
    fdNoSimulations, fdNoSizeSel, fdNoStyleSel,  fdNoVectorFonts,
    fdShowHelp, fdWysiwyg, fdLimitSize, fdScalableOnly, fdApplyButton);
  TFontDialogOptions = set of TFontDialogOption;

  TFontDialogDevice = (fdScreen, fdPrinter, fdBoth);

  TFDApplyEvent = procedure(Sender: TObject; Wnd: HWND) of object;

  TFontDialog = class(TCommonDialog)
  private
    FFont: TFont;
    FDevice: TFontDialogDevice;
    FOptions: TFontDialogOptions;
    FOnApply: TFDApplyEvent;
    FMinFontSize: Integer;
    FMaxFontSize: Integer;
    FFontCharsetModified: Boolean;
    FFontColorModified: Boolean;
    procedure DoApply(Wnd: HWND);
    procedure SetFont(Value: TFont);
    procedure UpdateFromLogFont(const LogFont: TLogFont);
  protected
    procedure Apply(Wnd: HWND); dynamic;
    procedure WndProc(var Message: TMessage); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function Execute: Boolean; override;
  published
    property Font: TFont read FFont write SetFont;
    property Device: TFontDialogDevice read FDevice write FDevice default fdScreen;
    property MinFontSize: Integer read FMinFontSize write FMinFontSize;
    property MaxFontSize: Integer read FMaxFontSize write FMaxFontSize;
    property Options: TFontDialogOptions read FOptions write FOptions default [fdEffects];
    property OnApply: TFDApplyEvent read FOnApply write FOnApply;
  end;

{ TPrinterSetupDialog }

  TPrinterSetupDialog = class(TCommonDialog)
  public
    function Execute: Boolean; override;
  end;

{ TPrintDialog }

  TPrintRange = (prAllPages, prSelection, prPageNums);
  TPrintDialogOption = (poPrintToFile, poPageNums, poSelection, poWarning,
    poHelp, poDisablePrintToFile);
  TPrintDialogOptions = set of TPrintDialogOption;

  TPrintDialog = class(TCommonDialog)
  private
    FFromPage: Integer;
    FToPage: Integer;
    FCollate: Boolean;
    FOptions: TPrintDialogOptions;
    FPrintToFile: Boolean;
    FPrintRange: TPrintRange;
    FMinPage: Integer;
    FMaxPage: Integer;
    FCopies: Integer;
    procedure SetNumCopies(Value: Integer);
  public
    function Execute: Boolean; override;
  published
    property Collate: Boolean read FCollate write FCollate default False;
    property Copies: Integer read FCopies write SetNumCopies default 0;
    property FromPage: Integer read FFromPage write FFromPage default 0;
    property MinPage: Integer read FMinPage write FMinPage default 0;
    property MaxPage: Integer read FMaxPage write FMaxPage default 0;
    property Options: TPrintDialogOptions read FOptions write FOptions default [];
    property PrintToFile: Boolean read FPrintToFile write FPrintToFile default False;
    property PrintRange: TPrintRange read FPrintRange write FPrintRange default prAllPages;
    property ToPage: Integer read FToPage write FToPage default 0;
  end;

{ TFindDialog }

  TFindOption = (frDown, frFindNext, frHideMatchCase, frHideWholeWord,
    frHideUpDown, frMatchCase, frDisableMatchCase, frDisableUpDown,
    frDisableWholeWord, frReplace, frReplaceAll, frWholeWord, frShowHelp);
  TFindOptions = set of TFindOption;

  TFindReplaceFunc = function(var FindReplace: TFindReplace): HWnd stdcall;

  TFindDialog = class(TCommonDialog)
  private
    FOptions: TFindOptions;
    FPosition: TPoint;
    FFindReplaceFunc: TFindReplaceFunc;
    FRedirector: TWinControl;
    FOnFind: TNotifyEvent;
    FOnReplace: TNotifyEvent;
    FFindHandle: HWnd;
    FFindReplace: TFindReplace;
    FFindText: array[0..255] of Char;
    FReplaceText: array[0..255] of Char;
    function GetFindText: string;
    function GetLeft: Integer;
    function GetPosition: TPoint;
    function GetReplaceText: string;
    function GetTop: Integer;
    procedure SetFindText(const Value: string);
    procedure SetLeft(Value: Integer);
    procedure SetPosition(const Value: TPoint);
    procedure SetReplaceText(const Value: string);
    procedure SetTop(Value: Integer);
    property ReplaceText: string read GetReplaceText write SetReplaceText;
    property OnReplace: TNotifyEvent read FOnReplace write FOnReplace;
  protected
    function MessageHook(var Msg: TMessage): Boolean; override;
    procedure Find; dynamic;
    procedure Replace; dynamic;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure CloseDialog;
    function Execute: Boolean; override;
    property Left: Integer read GetLeft write SetLeft;
    property Position: TPoint read GetPosition write SetPosition;
    property Top: Integer read GetTop write SetTop;
  published
    property FindText: string read GetFindText write SetFindText;
    property Options: TFindOptions read FOptions write FOptions default [frDown];
    property OnFind: TNotifyEvent read FOnFind write FOnFind;
  end;

{ TReplaceDialog }

  TReplaceDialog = class(TFindDialog)
  public
    constructor Create(AOwner: TComponent); override;
  published
    property ReplaceText;
    property OnReplace;
  end;

{ Message dialog }

type
  TMsgDlgType = (mtWarning, mtError, mtInformation, mtConfirmation, mtCustom);
  TMsgDlgBtn = (mbYes, mbNo, mbOK, mbCancel, mbAbort, mbRetry, mbIgnore,
    mbAll, mbNoToAll, mbYesToAll, mbHelp);

  TMsgDlgButtons = set of TMsgDlgBtn;

const
  mbYesNoCancel = [mbYes, mbNo, mbCancel];
  mbOKCancel = [mbOK, mbCancel];
  mbAbortRetryIgnore = [mbAbort, mbRetry, mbIgnore];

function CreateMessageDialog(const Msg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons): TForm;

function MessageDlg(const Msg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons; HelpCtx: Longint): Integer;
function MessageDlgPos(const Msg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons; HelpCtx: Longint; X, Y: Integer): Integer;
function MessageDlgPosHelp(const Msg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons; HelpCtx: Longint; X, Y: Integer;
  const HelpFileName: string): Integer;

procedure ShowMessage(const Msg: string);
procedure ShowMessageFmt(const Msg: string; Params: array of const);
procedure ShowMessagePos(const Msg: string; X, Y: Integer);

{ Input dialog }

function InputBox(const ACaption, APrompt, ADefault: string): string;
function InputQuery(const ACaption, APrompt: string;
  var Value: string): Boolean;

implementation

uses ExtCtrls, Consts, Printers, Dlgs;

{ Private globals }

var
  CreationControl: TCommonDialog = nil;
  HelpMsg: Cardinal;
  FindMsg: Cardinal;
  WndProcPtrAtom: TAtom = 0;
  HookCtl3D: Boolean;

{ Center the given window on the screen }

procedure CenterWindow(Wnd: HWnd);
var
  Rect: TRect;
  Monitor: TMonitor;
begin
  GetWindowRect(Wnd, Rect);
  Monitor := Application.MainForm.Monitor;
  SetWindowPos(Wnd, 0,
    Monitor.Left + ((Monitor.Width - Rect.Right + Rect.Left) div 2),
    Monitor.Top + ((Monitor.Height - Rect.Bottom + Rect.Top) div 3),
    0, 0, SWP_NOACTIVATE or SWP_NOSIZE or SWP_NOZORDER);
end;

{ Generic dialog hook. Centers the dialog on the screen in response to
  the WM_INITDIALOG message }

function DialogHook(Wnd: HWnd; Msg: UINT; WParam: WPARAM; LParam: LPARAM): UINT; stdcall;
begin
  Result := 0;
  case Msg of
    WM_INITDIALOG:
      begin
        if HookCtl3D then
        begin
          Subclass3DDlg(Wnd, CTL3D_ALL);
          SetAutoSubClass(True);
        end;
        CenterWindow(Wnd);
        CreationControl.FHandle := Wnd;
        CreationControl.FDefWndProc := Pointer(SetWindowLong(Wnd, GWL_WNDPROC,
          Longint(CreationControl.FObjectInstance)));
        CallWindowProc(CreationControl.FObjectInstance, Wnd, Msg, WParam, LParam);
        CreationControl := nil;
      end;
    WM_DESTROY:
      if HookCtl3D then SetAutoSubClass(False);
  end;
end;

{ TCommonDialog }

constructor TCommonDialog.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FCtl3D := True;
  FObjectInstance := MakeObjectInstance(MainWndProc);
end;

destructor TCommonDialog.Destroy;
begin
  if FObjectInstance <> nil then FreeObjectInstance(FObjectInstance);
  inherited Destroy;
end;

function TCommonDialog.MessageHook(var Msg: TMessage): Boolean;
begin
  Result := False;
  if (Msg.Msg = HelpMsg) and (FHelpContext <> 0) then
  begin
    Application.HelpContext(FHelpContext);
    Result := True;
  end;
end;

procedure TCommonDialog.DefaultHandler(var Message);
begin
  if FHandle <> 0 then
    with TMessage(Message) do
      Result := CallWindowProc(FDefWndProc, FHandle, Msg, WParam, LParam)
  else inherited DefaultHandler(Message);
end;

procedure TCommonDialog.MainWndProc(var Message: TMessage);
begin
  try
    WndProc(Message);
  except
    Application.HandleException(Self);
  end;
end;

procedure TCommonDialog.WndProc(var Message: TMessage);
begin
  Dispatch(Message);
end;

procedure TCommonDialog.WMDestroy(var Message: TWMDestroy);
begin
  inherited;
  DoClose;
end;

procedure TCommonDialog.WMInitDialog(var Message: TWMInitDialog);
begin
  { Called only by non-explorer style dialogs }
  DoShow;
  { Prevent any further processing }
  Message.Result := 0;
end;

procedure TCommonDialog.WMNCDestroy(var Message: TWMNCDestroy);
begin
  inherited;
  FHandle := 0;
end;

function TCommonDialog.TaskModalDialog(DialogFunc: Pointer; var DialogData): Bool;
type
  TDialogFunc = function(var DialogData): Bool stdcall;
var
  ActiveWindow: HWnd;