curredit.pas

rxlib2.75控件包

{*******************************************************}
{                                                       }
{         Delphi VCL Extensions (RX)                    }
{                                                       }
{         Copyright (c) 1995, 1996 AO ROSNO             }
{         Copyright (c) 1997, 1998 Master-Bank          }
{                                                       }
{*******************************************************}

unit CurrEdit;

{$I RX.INC}
{$W-}

interface

uses SysUtils, Windows, Messages, Classes, Graphics, Controls, Menus, Forms, StdCtrls, Mask,
  Buttons, ToolEdit;

type

{ TCustomNumEdit }

  TCustomNumEdit = class(TCustomComboEdit)
  private
    FCanvas: TControlCanvas;
    FAlignment: TAlignment;
    FFocused: Boolean;
    FValue: Extended;
    FMinValue, FMaxValue: Extended;
    FDecimalPlaces: Cardinal;
    FBeepOnError: Boolean;
    FCheckOnExit: Boolean;
    FZeroEmpty: Boolean;
    FFormatOnEditing: Boolean;
    FFormatting: Boolean;
    FDisplayFormat: String;
    procedure SetFocused(Value: Boolean);
    procedure SetAlignment(Value: TAlignment);
    procedure SetBeepOnError(Value: Boolean);
    procedure SetDisplayFormat(const Value: string);
    function GetDisplayFormat: string;
    procedure SetDecimalPlaces(Value: Cardinal);
    function GetValue: Extended;
    procedure SetValue(AValue: Extended);
    function GetAsInteger: Longint;
    procedure SetAsInteger(AValue: Longint);
    procedure SetMaxValue(AValue: Extended);
    procedure SetMinValue(AValue: Extended);
    procedure SetZeroEmpty(Value: Boolean);
    procedure SetFormatOnEditing(Value: Boolean);
    function GetText: string;
    procedure SetText(const AValue: string);
    function TextToValText(const AValue: string): string;
    function CheckValue(NewValue: Extended; RaiseOnError: Boolean): Extended;
    function IsFormatStored: Boolean;
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure CMEnter(var Message: TCMEnter); message CM_ENTER;
    procedure CMExit(var Message: TCMExit); message CM_EXIT;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
    procedure WMPaste(var Message: TMessage); message WM_PASTE;
  protected
{$IFDEF WIN32}
    procedure AcceptValue(const Value: Variant); override;
{$ELSE}
    procedure AcceptValue(const Value: string); override;
{$ENDIF}
    procedure Change; override;
    procedure ReformatEditText; dynamic;
    function GetDefaultBitmap(var DestroyNeeded: Boolean): TBitmap; override;
    procedure DataChanged; virtual;
    function DefaultDisplayFormat: string; virtual;
    procedure KeyPress(var Key: Char); override;
    function IsValidChar(Key: Char): Boolean; virtual;
    function FormatDisplayText(Value: Extended): string;
    function GetDisplayText: string; virtual;
    procedure Reset; override;
    procedure CheckRange;
    procedure UpdateData;
    procedure UpdatePopup; virtual;
    property Formatting: Boolean read FFormatting;
    property Alignment: TAlignment read FAlignment write SetAlignment
      default taRightJustify;
    property BeepOnError: Boolean read FBeepOnError write SetBeepOnError
      default True;
    property CheckOnExit: Boolean read FCheckOnExit write FCheckOnExit default False;
    property GlyphKind default gkDefault;
    property ButtonWidth default 20;
    property DecimalPlaces: Cardinal read FDecimalPlaces write SetDecimalPlaces
      default 2;
    property DisplayFormat: string read GetDisplayFormat write SetDisplayFormat
      stored IsFormatStored;
    property MaxValue: Extended read FMaxValue write SetMaxValue;
    property MinValue: Extended read FMinValue write SetMinValue;
    property FormatOnEditing: Boolean read FFormatOnEditing
      write SetFormatOnEditing default False;
    property Text: string read GetText write SetText stored False;
    property MaxLength default 0;
    property ZeroEmpty: Boolean read FZeroEmpty write SetZeroEmpty default True;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Clear; {$IFDEF RX_D5} override; {$ENDIF}
    property AsInteger: Longint read GetAsInteger write SetAsInteger;
    property DisplayText: string read GetDisplayText;
    property PopupVisible;
    property Value: Extended read GetValue write SetValue;
  end;

{ TCurrencyEdit }

  TCurrencyEdit = class(TCustomNumEdit)
  protected
    function DefaultDisplayFormat: string; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Alignment;
    property AutoSelect;
    property AutoSize;
    property BeepOnError;
    property BorderStyle;
    property CheckOnExit;
    property Color;
    property Ctl3D;
    property DecimalPlaces;
    property DisplayFormat;
    property DragCursor;
    property DragMode;
    property Enabled;
    property Font;
    property FormatOnEditing;
    property HideSelection;
{$IFDEF RX_D4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
{$IFDEF WIN32}
  {$IFNDEF VER90}
    property ImeMode;
    property ImeName;
  {$ENDIF}
{$ENDIF}
    property MaxLength;
    property MaxValue;
    property MinValue;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Text;
    property Value;
    property Visible;
    property ZeroEmpty;
    property OnChange;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
{$IFDEF RX_D5}
    property OnContextPopup;
{$ENDIF}
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D4}
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

{ TRxCustomCalcEdit }

  TRxCustomCalcEdit = class(TCustomNumEdit)
  public
    constructor Create(AOwner: TComponent); override;
  end;

{ TRxCalcEdit }

  TRxCalcEdit = class(TRxCustomCalcEdit)
  published
    property Alignment;
    property AutoSelect;
    property AutoSize;
    property BeepOnError;
    property BorderStyle;
    property ButtonHint;
    property CheckOnExit;
    property ClickKey;
    property Color;
    property Ctl3D;
    property DecimalPlaces;
    property DirectInput;
    property DisplayFormat;
    property DragCursor;
    property DragMode;
    property Enabled;
    property Font;
    property FormatOnEditing;
    property GlyphKind;
    { Ensure GlyphKind is published before Glyph and ButtonWidth }
    property Glyph;
    property ButtonWidth;
    property HideSelection;
{$IFDEF RX_D4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
{$IFDEF WIN32}
  {$IFNDEF VER90}
    property ImeMode;
    property ImeName;
  {$ENDIF}
{$ENDIF}
    property MaxLength;
    property MaxValue;
    property MinValue;
    property NumGlyphs;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupAlign;
    property PopupMenu;
    property ReadOnly;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Text;
    property Value;
    property Visible;
    property ZeroEmpty;
    property OnButtonClick;
    property OnChange;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
{$IFDEF RX_D5}
    property OnContextPopup;
{$ENDIF}
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D4}
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

implementation

uses Consts, rxStrUtils, VclUtils, MaxMin, RxCalc;

 {$R *.R32}

const
  sCalcBmp = 'CEDITBMP'; { Numeric editor button glyph }
  CalcBitmap: TBitmap = nil;

type
  THack = class(TPopupWindow);

function IsValidFloat(const Value: string; var RetValue: Extended): Boolean;
var
  I: Integer;
  Buffer: array[0..63] of Char;
begin
  Result := False;
  for I := 1 to Length(Value) do
    if not (Value[I] in [DecimalSeparator, '-', '+', '0'..'9', 'e', 'E']) then
      Exit;
  Result := TextToFloat(StrPLCopy(Buffer, Value,
    SizeOf(Buffer) - 1), RetValue {$IFDEF WIN32}, fvExtended {$ENDIF});
end;

function FormatFloatStr(const S: string; Thousands: Boolean): string;
var
  I, MaxSym, MinSym, Group: Integer;
  IsSign: Boolean;
begin
  Result := '';
  MaxSym := Length(S);
  IsSign := (MaxSym > 0) and (S[1] in ['-', '+']);
  if IsSign then MinSym := 2
  else MinSym := 1;
  I := Pos(DecimalSeparator, S);
  if I > 0 then MaxSym := I - 1;
  I := Pos('E', AnsiUpperCase(S));
  if I > 0 then MaxSym := Min(I - 1, MaxSym);
  Result := Copy(S, MaxSym + 1, MaxInt);
  Group := 0;
  for I := MaxSym downto MinSym do begin
    Result := S[I] + Result;
    Inc(Group);
    if (Group = 3) and Thousands and (I > MinSym) then begin
      Group := 0;
      Result := ThousandSeparator + Result;
    end;
  end;
  if IsSign then Result := S[1] + Result;
end;

{ TCustomNumEdit }

constructor TCustomNumEdit.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  ControlStyle := ControlStyle - [csSetCaption];
  MaxLength := 0;
  FBeepOnError := True;
  FAlignment := taRightJustify;
  FDisplayFormat := DefaultDisplayFormat;
  FDecimalPlaces := 2;
  FZeroEmpty := True;
  inherited Text := '';
  inherited Alignment := taLeftJustify;
  FDefNumGlyphs := 2;
  { forces update }
  DataChanged;
  ControlState := ControlState + [csCreating];
  try
    GlyphKind := gkDefault;
    ButtonWidth := 20;
  finally
    ControlState := ControlState - [csCreating];
  end;
end;

destructor TCustomNumEdit.Destroy;
begin
  FCanvas.Free;
  //DisposeStr(FDisplayFormat);
  if FPopup <> nil then begin
    TPopupWindow(FPopup).OnCloseUp := nil;
    FPopup.Free;
    FPopup := nil;
  end;
  inherited Destroy;
end;

function TCustomNumEdit.GetDefaultBitmap(var DestroyNeeded: Boolean): TBitmap;
begin
  DestroyNeeded := False;
  if CalcBitmap = nil then begin
    CalcBitmap := TBitmap.Create;
    CalcBitmap.Handle := LoadBitmap(hInstance, sCalcBmp);
  end;
  Result := CalcBitmap;
end;

function TCustomNumEdit.DefaultDisplayFormat: string;
begin
  Result := ',0.##';
end;

function TCustomNumEdit.IsFormatStored: Boolean;
begin
  Result := (DisplayFormat <> DefaultDisplayFormat);
end;

function TCustomNumEdit.IsValidChar(Key: Char): Boolean;
var
  S: string;
  SelStart, SelStop, DecPos: Integer;
  RetValue: Extended;
begin
  Result := False;
  S := EditText;
  GetSel(SelStart, SelStop);
  System.Delete(S, SelStart + 1, SelStop - SelStart);
  System.Insert(Key, S, SelStart + 1);
  S := TextToValText(S);
  DecPos := Pos(DecimalSeparator, S);
  if (DecPos > 0) then begin
    SelStart := Pos('E', UpperCase(S));
    if (SelStart > DecPos) then DecPos := SelStart - DecPos
    else DecPos := Length(S) - DecPos;
    if DecPos > Integer(FDecimalPlaces) then Exit;
  end;
  Result := IsValidFloat(S, RetValue);
  if Result and (FMinValue >= 0) and (FMaxValue > 0) and (RetValue < 0) then
    Result := False;
end;

procedure TCustomNumEdit.KeyPress(var Key: Char);