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Пример компонента типа XPButton

Раньше казалось, что невозможно было преодолеть нестабильность Windows-98. Но теперь мы видим, что Windows XP ее в этом преодолела. 


unit GsXPButton;
{
written by Jeff Caler,
Please use this responsibly and
freely in your applications, modify, etc,
but dont take credit for my work, i wouldnt yours,
I reserve all rights given by copyright
in the US and other countries.
No right to resell this component or it's code is given nor implied.
Enjoy it responsibly. As in, Dont take my name out and put in yours.
Thank you.
Jeff Caler
madmacs@netzero.net
GenieOS Software
http://www.genieos.co.uk
3-20-02
}

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Buttons;

type
  TGsXPButton = class(TSpeedButton)
  private
    { Private declarations }
     eColor, eSelBackColor, eSelFontColor, eSelBorderColor: TColor;
     FActive: boolean;
     FButtonDown: Boolean;
     FForm: TScrollingWinControl;
     FStyle: integer;
     FDefault: boolean;
     Procedure CMMouseEnter( Var Message: TMessage ); Message CM_MOUSEENTER;
     Procedure CMMouseLeave( Var Message: TMessage ); Message CM_MOUSELEAVE;
     procedure SetForm(const Value: TScrollingWinControl);

  protected
    { Protected declarations }

  public
    { Public declarations }
     Selected: Boolean;
     constructor Create( AOwner : TComponent ); override;
     property Form: TScrollingWinControl read FForm write SetForm;
     Procedure Paint; Override;
     procedure SetActive(const Value: boolean);
     procedure SetStyle (const Value: integer);
     procedure SetDefault(const Value: boolean);
     Procedure Style0(AOwner : TComponent);
     Procedure Style1(AOwner : TComponent);
  published
    { Published declarations }
     property Active: boolean read FActive write SetActive;
     Property Color: TColor read eColor write eColor;
     property Default: Boolean read FDefault write SetDefault;
     property Flat default True;
     Property SelBackColor: TColor read eSelBackColor write eSelBackColor;
     Property SelBorderColor: TColor read eSelBorderColor write eSelBorderColor;
     Property SelFontColor: TColor read eSelFontColor write eSelFontColor;
     Property Style: integer read FStyle write SetStyle;

  end;

type
  TGsXPOkButton = class(TGsXPButton)
  private
    { Private declarations }
  protected
    { Protected declarations }
  public
    { Public declarations }
     constructor Create( AOwner : TComponent ); override;

  published
    { Published declarations }
  end;


  type
  TGsXPCancelButton = class(TGsXPButton)
  private
    { Private declarations }
   protected
    { Protected declarations }
  public
    { Public declarations }
     constructor Create( AOwner : TComponent );  override;

  published
    { Published declarations }
  end;

procedure Register;

implementation

constructor TGsXPButton.Create( AOwner : TComponent );
begin

  inherited Create( AOwner );
     ControlStyle:= ControlStyle + [csAcceptsControls];
  Font.Color := clWindowText;
  Color := clBtnFace;
  FButtonDown := FALSE;
  Flat := True;
  FForm := Owner as TScrollingWinControl;
  Selected:= False;
  Height:= 22;
  SelFontColor := clHighLight;
  SelBackColor := clHighLightText;
  SelBorderColor := $0000A9E1;
  //Top:= 4;
  Transparent:= False;
  Width:= 65;
  Active := True;
  Style := 0;
end;

procedure TGsXPButton.SetStyle(const Value: integer);
begin
  if FStyle <> Value then
  begin
    FStyle := Value;

    end;
end;

Procedure TGsXPButton.CMMouseEnter( Var Message: TMessage );
Begin
//hmmm, no selected property either ehhh.

     //Flicker GONE!
     If Selected = False then
     begin
     Selected := True;
     RePaint;
     end
     else
     Selected := True;
     exit;

End;


Procedure TGsXPButton.CMMouseLeave( Var Message: TMessage );
Begin

     Selected:= False;
     FButtonDown := FALSE;
     RePaint;
     IF Selected = False then exit;

End;

procedure TGsXPButton.SetForm(const Value: TScrollingWinControl);
var
  Hold: boolean;
begin
  if Value <> FForm then
  begin
    Hold := Active;
    Active := false;
    FForm := Value;
    if Hold then
      Active := True;
  end;
end;

procedure TGsXPButton.SetActive(const Value: boolean);
begin

  FActive := Value;

end;

procedure TGsXPButton.SetDefault(const Value: boolean);
begin
FDefault := Value;
end;

function NewColor(Canvas: TCanvas; clr: TColor; Value: integer): TColor;
var
  r, g, b: integer;

begin
  if Value > 100 then Value := 100;
  clr := ColorToRGB(clr);
  r := Clr and $000000FF;
  g := (Clr and $0000FF00) shr 8;
  b := (Clr and $00FF0000) shr 16;


  r := r + Round((255 - r) * (value / 100));
  g := g + Round((255 - g) * (value / 100));
  b := b + Round((255 - b) * (value / 100));

  Result := Windows.GetNearestColor(Canvas.Handle, RGB(r, g, b));

end;

Procedure TGsXPButton.style0(AOwner : TComponent);
var
        Gbtn: TGsXPButton;
        Right, Bottom: integer;
        Selector, txtRect, ARect, iconRect, FRect: TRect;
        FColor, FSelBackColor, FSelFontColor: TColor;
        FSelBorderColor: TColor;
        SelText: String;
        TextFormat: integer;
        x1, y1 : integer;
        i,v : integer;
        CWidth, CHeight: INTEGER;
begin
  inherited;
        Gbtn:= TGsXPButton(Self);
        FColor := eColor;
        FSelBackColor := eSelBackColor;
        FSelFontColor := eSelFontColor;
        Bottom := (Gbtn.Canvas.ClipRect.Bottom);
        Right := (Gbtn.Canvas.ClipRect.Right);
        ARect.Top := (Gbtn.Canvas.ClipRect.Top);
        ARect.Right := Right;
        ARect.Bottom := Bottom;
        Arect.Left := (Gbtn.Canvas.ClipRect.Left);
        TextFormat := DT_Left;
        SelText :=( '  ' + (Gbtn.Caption));

      If Gbtn.Active then
      Gbtn.Style := 0;
        begin
        Flat:= True;
        font.Color := font.Color;
        Color := FColor;



        Selector := Rect( ARect.Left , ARect.Top ,
        ARect.right , ARect.bottom );

        FRect:= Rect(Arect.Left+3,Arect.Top +3,
        Arect.Right -3, Arect.Bottom -3);

        //capture the image rect and layout image and text
        //Heavy on the math...

if not Glyph.Empty then begin
       if Layout = blGlyphLeft then begin
          SelText:= SelText;

        iconRect:=(Glyph.Canvas.ClipRect);
        CWidth:=(Glyph.Width + Canvas.TextWidth(SelText));

        iconRect.Left := (ARect.Right - CWidth) div 2;
        iconRect.Top := (ARect.Bottom - Glyph.Height) div 2 ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        x1:= (iconRect.Right);
        y1:= (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect:= Rect (X1,Y1, Selector.Right, Selector.Bottom );
        end
        else
        if Layout = blGlyphRight then begin
        Seltext := SelText + '  ';

        iconRect:=(Glyph.Canvas.ClipRect);
        CWidth:=(Glyph.Width + Canvas.TextWidth(SelText));
        TxtRect:= (Gbtn.Canvas.ClipRect);

        TxtRect.Left := (ARect.Right - CWidth) div 2;
        TxtRect.Top := (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));

        IconRect.Left := (TxtRect.Right);
        iconRect.Top := (ARect.Bottom - Glyph.Height) div 2 ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        end
        else
        if Layout = blGlyphTop then begin
        SelText := SelText;
        iconRect:=(Glyph.Canvas.ClipRect);
        CHeight:= (Canvas.TextHeight(SelText)+ Glyph.Height);

        TxtRect:= (Gbtn.Canvas.ClipRect);

        IconRect.Left := (Canvas.ClipRect.Right div 2) - (glyph.Width div 2);
        iconRect.Top := (ARect.Bottom div 2) - ((glyph.Height + Canvas.TextHeight(Seltext)) div 2) ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);

        TxtRect.Left := (ARect.Right div 2) - (Canvas.TextWidth(Seltext) div 2);
        TxtRect.Top := (iconRect.Bottom + 2);
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));
        end
        else
        if Layout = blGlyphBottom then begin
        SelText := SelText;
        iconRect:=(Glyph.Canvas.ClipRect);
        CHeight:= (Canvas.TextHeight(SelText)+ Glyph.Height);

        TxtRect:= (Gbtn.Canvas.ClipRect);

        TxtRect.Left := (ARect.Right div 2) - (Canvas.TextWidth(Seltext) div 2);
        TxtRect.Top := (ARect.Bottom div 2) - ((glyph.Height + Canvas.TextHeight(Seltext)) div 2) ;
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));

        IconRect.Left := (Canvas.ClipRect.Right div 2) - (glyph.Width div 2);
        iconRect.Top := (txtRect.Bottom + 2) ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        end;
        end
        else
        if Glyph.Empty Then
        begin
        SelText := SelText;
        x1:= (Arect.Right - Canvas.TextWidth(SelText))div 2;
        y1:= (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect:= Rect (X1,Y1, Selector.Right, Selector.Bottom );
        end;


      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FColor;
      Canvas.FillRect(ARect);

IF GBtn.Default THEN
  IF not Selected then
    If not Gbtn.MouseCapture then
  begin
        v:=0;
    Selector.top := Selector.bottom - 1;
    for i := ARect.bottom downto ARect.top do
    begin
      if (Selector.top < ARect.bottom)
        and (Selector.top > Arect.bottom + 5) then
        inc(v, 1)
      else
        inc(v, 2);

      if v > 96 then v := 96;


      Canvas.Brush.Color := NewColor(Canvas, $00FF8080, v);
      Canvas.FillRect(Selector);
      Selector.top := Selector.top -1;
      Selector.bottom := Selector.top + 1;


      Canvas.Brush.Style := bsClear;
      Canvas.Pen.color := $00984E00;
      Canvas.RoundRect(ARect.Left ,
                Arect.top , Arect.right ,
                Arect.bottom , 5, 5);

      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FSelBackColor;
      Canvas.FillRect(FRect);

           //draw the text

        DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);
              if not gbtn.Glyph.Empty THEN Canvas.Rectangle (iconRect);
              begin
              Canvas.CopyRect(IconRect,Canvas,(GBtn.Glyph.Canvas.ClipRect));
              Canvas.BrushCopy (IconRect, Glyph,(GBtn.Glyph.Canvas.ClipRect),(clBlue));
              Gbtn.Glyph.FreeImage;

              end;
      end;
   end;

   If Gbtn.Selected then
        if not gbtn.MouseCapture then
      begin
 //gradient begin
                  v:=0;
    Selector.top := Selector.bottom - 1;
    for i := ARect.bottom downto ARect.top do
    begin
      if (Selector.top < ARect.bottom)
        and (Selector.top > Arect.bottom + 5) then
        inc(v, 1)
      else
        inc(v, 3);

      if v > 96 then v := 96;


      Canvas.Brush.Color := NewColor(Canvas, $0000A9E1, v);
      Canvas.FillRect(Selector);

      Selector.top := Selector.top -1;
      Selector.bottom := Selector.top + 1;

      Canvas.Brush.Style := bsClear;
      Canvas.Pen.color := $00984E00;
      Canvas.RoundRect(ARect.Left ,
                Arect.top , Arect.right ,
                Arect.bottom , 5, 5);

      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FSelBackColor;
      Canvas.FillRect(FRect);


       Canvas.Font.color := FSelFontColor;


        DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);

                      if not gbtn.Glyph.Empty THEN Canvas.Rectangle (iconRect);
              begin
              Canvas.CopyRect(IconRect,Canvas,(GBtn.Glyph.Canvas.ClipRect));
              Canvas.BrushCopy (IconRect, Glyph,(GBtn.Glyph.Canvas.ClipRect),(clBlue));
              Gbtn.Glyph.FreeImage;

              end;
     end;
 end;



        //draw the  outline
        Canvas.Brush.Style := bsClear;
        Canvas.Pen.color := $00984E00;
        Canvas.RoundRect(ARect.Left,
                ARect.top, ARect.right,
                ARect.bottom, 5, 5);

        //override the button canvas
        Canvas.Brush.Style := bsSolid;
        Canvas.Brush.Color:= FColor;
        Canvas.FillRect(Frect);

        //over ride the text
                 DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);

                if not gbtn.Glyph.Empty THEN Canvas.Rectangle (iconRect);
              begin
              Canvas.CopyRect(IconRect,Canvas,(GBtn.Glyph.Canvas.ClipRect));
              Canvas.BrushCopy (IconRect, Glyph,(GBtn.Glyph.Canvas.ClipRect),(clBlue));
              gbtn.Glyph.FreeImage;

                end;
    end;

end;




Procedure TGsXPButton.Style1(AOwner : TComponent);
var
        Gbtn: TGsXPButton;
        Right, Bottom: integer;
        Selector, txtRect, ARect, iconRect, FRect: TRect;
        FColor, FSelBackColor, FSelFontColor: TColor;
        FSelBorderColor: TColor;
        SelText: String;
        TextFormat: integer;
        x1, y1 : integer;
        i,v : integer;
        CWidth, CHeight: INTEGER;
begin
  inherited;
//let the games begin
        Gbtn:= TGsXPButton(Self);
        FColor := eColor;
        FSelBackColor := eSelBackColor;
        FSelFontColor := eSelFontColor;
        Bottom := (Gbtn.Canvas.ClipRect.Bottom);
        Right := (Gbtn.Canvas.ClipRect.Right);
        ARect.Top := (Gbtn.Canvas.ClipRect.Top);
        ARect.Right := Right;
        ARect.Bottom := Bottom;
        Arect.Left := (Gbtn.Canvas.ClipRect.Left);
        TextFormat := DT_Left;
        SelText :=( '  ' + (Gbtn.Caption));

      If Gbtn.Active then
      Gbtn.Style := 1;
        begin
        Flat:= True;
        font.Color := font.Color;
        Color := FColor;



        Selector := Rect( ARect.Left , ARect.Top ,
        ARect.right , ARect.bottom );

        FRect:= Rect(Arect.Left+3,Arect.Top +3,
        Arect.Right -3, Arect.Bottom -3);

        //capture the image rect and layout image and text
        //Heavy on the math...

if not Glyph.Empty then begin
       if Layout = blGlyphLeft then begin
          SelText:= SelText;

        iconRect:=(Glyph.Canvas.ClipRect);
        CWidth:=(Glyph.Width + Canvas.TextWidth(SelText));

        iconRect.Left := (ARect.Right - CWidth) div 2;
        iconRect.Top := (ARect.Bottom - Glyph.Height) div 2 ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        x1:= (iconRect.Right);
        y1:= (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect:= Rect (X1,Y1, Selector.Right, Selector.Bottom );
        end
        else
        if Layout = blGlyphRight then begin
        Seltext := SelText + '  ';

        iconRect:=(Glyph.Canvas.ClipRect);
        CWidth:=(Glyph.Width + Canvas.TextWidth(SelText));
        TxtRect:= (Gbtn.Canvas.ClipRect);

        TxtRect.Left := (ARect.Right - CWidth) div 2;
        TxtRect.Top := (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));

        IconRect.Left := (TxtRect.Right);
        iconRect.Top := (ARect.Bottom - Glyph.Height) div 2 ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        end
        else
        if Layout = blGlyphTop then begin
        SelText := SelText;
        iconRect:=(Glyph.Canvas.ClipRect);
        CHeight:= (Canvas.TextHeight(SelText)+ Glyph.Height) div 2;

        TxtRect:= (Gbtn.Canvas.ClipRect);

        IconRect.Left := (Canvas.ClipRect.Right div 2) - (glyph.Width div 2);
        iconRect.Top := (ARect.Bottom div 2) - (CHeight) ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);

        TxtRect.Left := (ARect.Right div 2) - (Canvas.TextWidth(Seltext) div 2);
        TxtRect.Top := (iconRect.Bottom + 2);
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));
        end
        else
        if Layout = blGlyphBottom then begin
        SelText := SelText;
        iconRect:=(Glyph.Canvas.ClipRect);
        TxtRect:= (Gbtn.Canvas.ClipRect);

        TxtRect.Left := (ARect.Right div 2) - (Canvas.TextWidth(Seltext) div 2);
        TxtRect.Top := (ARect.Bottom div 2) - ((glyph.Height + Canvas.TextHeight(Seltext)) div 2) ;
        TxtRect.Right := (TxtRect.Left + Canvas.TextWidth(SelText));
        TxtRect.Bottom := (TxtRect.Top + Canvas.TextHeight(SelText));

        IconRect.Left := (Canvas.ClipRect.Right div 2) - (glyph.Width div 2);
        iconRect.Top := (txtRect.Bottom + 2) ;
        iconRect.Right := (iconRect.Left + Glyph.Width);
        iconRect.Bottom := (iconRect.Top + Glyph.Height);
        end;
        end
        else
        if Glyph.Empty Then
        begin
        SelText := SelText;
        x1:= (Arect.Right - Canvas.TextWidth(SelText))div 2;
        y1:= (Arect.Bottom - Canvas.TextHeight(SelText)) div 2;
        TxtRect:= Rect (X1,Y1, Selector.Right, Selector.Bottom );
        end;

      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FColor;
      Canvas.FillRect(ARect);

IF GBtn.Default THEN
  IF not Selected then
    If not Gbtn.MouseCapture then
  begin
        v:=0;
    Selector.top := Selector.bottom - 1;
    for i := ARect.bottom downto ARect.top do
    begin
      if (Selector.top < ARect.bottom)
        and (Selector.top > Arect.bottom + 5) then
        inc(v, 1)
      else
        inc(v, 2);

      if v > 96 then v := 96;


      Canvas.Brush.Color := NewColor(Canvas, $00FF8080, v);
      Canvas.FillRect(Selector);
      Selector.top := Selector.top -1;
      Selector.bottom := Selector.top + 1;


      Canvas.Brush.Style := bsClear;
      Canvas.Pen.color := $00984E00;
      Canvas.Rectangle(ARect.Left ,
                Arect.top , Arect.right ,
                Arect.bottom );

      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FSelBackColor;
      Canvas.FillRect(FRect);

           //draw the text

        DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);

      end;
   end;

   If Gbtn.Selected then
        if not gbtn.MouseCapture then
      begin
 //gradient begin
                  v:=0;
    Selector.top := Selector.bottom - 1;
    for i := ARect.bottom downto ARect.top do
    begin
      if (Selector.top < ARect.bottom)
        and (Selector.top > Arect.bottom + 5) then
        inc(v, 1)
      else
        inc(v, 3);

      if v > 96 then v := 96;


      Canvas.Brush.Color := NewColor(Canvas, $0000A9E1, v);
      Canvas.FillRect(Selector);

      Selector.top := Selector.top -1;
      Selector.bottom := Selector.top + 1;

      Canvas.Brush.Style := bsClear;
      Canvas.Pen.color := $00984E00;
      Canvas.Rectangle(ARect.Left ,
                Arect.top , Arect.right ,
                Arect.bottom );

      Canvas.Brush.Style:= bsSolid;
      Canvas.Brush.Color := FSelBackColor;
      Canvas.FillRect(FRect);


       Canvas.Font.color := FSelFontColor;


        DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);

     end;
 end;

        //draw the  outline
        Canvas.Brush.Style := bsClear;
        Canvas.Pen.color := $00984E00;
        Canvas.Rectangle(ARect.Left,
                ARect.top, ARect.right,
                ARect.bottom);

        //override the button canvas
        Canvas.Brush.Style := bsSolid;
        Canvas.Brush.Color:= FColor;
        Canvas.FillRect(Frect);

        //over ride the text
                 DrawtextEx(Gbtn.Canvas.Handle,
        PChar(SelText),
        Length(SelText),
        txtRect,
        TextFormat, nil);

                if not gbtn.Glyph.Empty THEN Canvas.Rectangle (iconRect);
              begin
              Canvas.CopyRect(IconRect,Canvas,(GBtn.Glyph.Canvas.ClipRect));
              Canvas.BrushCopy (IconRect, Glyph,(GBtn.Glyph.Canvas.ClipRect),(clBlue));
              gbtn.Glyph.FreeImage;
                end;
    end;

end;

Procedure TGsXPButton.Paint;
var
        Gbtn: TGsXPButton;
begin
//this grabs all the speedbuttons properties
        inherited;
//protect our design environment
  if not (csDesigning in ComponentState) then
  begin
        Gbtn:= TGsXPButton(Self);

If Gbtn.Active then
    If Gbtn.Style = 0 then
    begin
    Style0(Self);
    end
    else
    If Gbtn.Style = 1 then
    begin
     Style1(Self);
    end;
   end;
end;

//Begin Ok Button
  //inherits from the GSXPButton. only caption changed
  //same for cancel button.
  //make mods to main button, changes are inherited.

constructor TGsXPOkButton.Create( AOwner : TComponent );
begin
  // Don't forget to call the ancestor's constructor
  inherited Create( AOwner );
  Caption := '&OK';

end;

//Begin Cancel Button

constructor TGsXPCancelButton.Create( AOwner : TComponent );
begin
  inherited Create( AOwner );
  Caption := '&Cancel';
end;

procedure Register;
begin
  RegisterComponents('GenieOSTools', [TGsXPButton, TGsXPOKButton, TGsXPCancelButton]);
end;

end.

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Автор проекта: USU Software
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