{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvSplshWnd.PAS, released on 2002-07-04.

The Initial Developers of the Original Code are: Fedor Koshevnikov, Igor Pavluk and Serge Korolev
Copyright (c) 1997, 1998 Fedor Koshevnikov, Igor Pavluk and Serge Korolev
Copyright (c) 2001,2002 SGB Software
All Rights Reserved.

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.sourceforge.net

Known Issues:
-----------------------------------------------------------------------------}
// $Id: JvSplashWindow.pas 10612 2006-05-19 19:04:09Z jfudickar $

unit JvSplashWindow;

{$I jvcl.inc}

interface

uses
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  SysUtils, Classes, Windows, Graphics, Controls, Forms, StdCtrls, ExtCtrls,
  {$IFDEF VisualCLX}
  Qt,
  {$ENDIF VisualCLX}
  JvAnimatedImage, JvComponent;

type
  TJvSplashWindow = class(TJvForm)
  private
    FTextMessage: TLabel;
    function GetMessageText: string;
    procedure SetMessageText(const Value: string);
  protected
    {$IFDEF VCL}
    procedure CreateParams(var Params: TCreateParams); override;
    {$ENDIF VCL}
    {$IFDEF VisualCLX}
    function WidgetFlags: Integer; override;
    {$ENDIF VisualCLX}
  public
    Image: TImage;
    Animation: TJvAnimatedImage;
    procedure CenterFor(Form: TCustomForm);
    property MessageText: string read GetMessageText write SetMessageText;
  end;

function ShowSplashWindow(Graphic: TGraphic; const MsgText: string;
  JvxAnimate: Boolean; AlignForm: TCustomForm): TJvSplashWindow;

// (rom) changed to var (otherwise it makes no sense)
var
  SplashStayOnTop: Boolean = True;

{$IFDEF UNITVERSIONING}
const
  UnitVersioning: TUnitVersionInfo = (
    RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_32/run/JvSplashWindow.pas $';
    Revision: '$Revision: 10612 $';
    Date: '$Date: 2006-05-19 21:04:09 +0200 (ven., 19 mai 2006) $';
    LogPath: 'JVCL\run'
  );
{$ENDIF UNITVERSIONING}

implementation

uses
  Math;

const
  defSplashHeight = 64;
  defImageLeft = 16;
  defImageTop = 16;
  defTextWidth = 238;
  defTextLeft = 56;
  defTextRight = 16;

function CreateSplashWindow: TJvSplashWindow;
begin
  Result := TJvSplashWindow.CreateNew(Application, 0);
  with Result do
  begin
    BorderIcons := [];
    {$IFDEF VCL}
    BorderStyle := bsNone;
    {$ENDIF VCL}
    {$IFDEF VisualCLX}
    BorderStyle := fbsNone;
    AutoScroll := False;
    {$ENDIF VisualCLX}
    if SplashStayOnTop then
      FormStyle := fsStayOnTop
    else
      FormStyle := fsNormal;
    ClientHeight := defSplashHeight;
    ClientWidth := defImageLeft + defTextRight + 32;
    Enabled := False;
    {$IFDEF VCL}
    Font.Height := -11;
    Font.Name := 'MS Sans Serif';
    PixelsPerInch := 96;
    Scaled := True;
    {$ENDIF VCL}
    {$IFDEF VisualCLX}
    Font.Height := 11;
    Font.Name := 'Helvetica';
    PixelsPerInch := 96;
    Scaled := False;
    {$ENDIF VisualCLX}
    Font.Style := [];
    Font.Color := clWindowText;

    Image := TImage.Create(Result);
    Image.Parent := Result;
    Image.Left := defImageLeft;
    Image.Top := defImageTop;
    Image.Width := 32;
    Image.Height := 32;
    Image.AutoSize := False;
    Image.Stretch := True;
    Image.Visible := False;

    FTextMessage := TLabel.Create(Result);
    FTextMessage.Parent := Result;
    FTextMessage.Left := defTextLeft;
    FTextMessage.Width := defTextWidth;
    FTextMessage.AutoSize := False;
    FTextMessage.Alignment := taCenter;
    FTextMessage.WordWrap := True;

    Animation := TJvAnimatedImage.Create(Result);
    Animation.Parent := Result;
    Animation.Left := defImageLeft;
    Animation.Top := defImageTop;
    Animation.Width := 32;
    Animation.Height := 32;
    Animation.Active := False;
    {$IFDEF VCL}
    Animation.AutoSize := False;
    {$ENDIF VCL}
    Animation.Stretch := True;
    Animation.Visible := False;
  end;
end;

function ShowSplashWindow(Graphic: TGraphic; const MsgText: string;
  JvxAnimate: Boolean; AlignForm: TCustomForm): TJvSplashWindow;
begin
  Result := CreateSplashWindow;
  with Result do
  begin
    if JvxAnimate and (Graphic <> nil) then
    begin
      Animation.Glyph := Graphic as TBitmap;
      Animation.Visible := True;
      Animation.AsyncDrawing := True;
      Animation.Active := True;
    end
    else
    if Graphic <> nil then
    begin
      Image.Picture.Graphic := Graphic;
      Image.Visible := True;
    end
    else
      FTextMessage.Left := defImageLeft;
    FTextMessage.Caption := MsgText;
    MessageText := MsgText;
    CenterFor(AlignForm);
    Show;
    Update;
  end;
end;

{$IFDEF VCL}
procedure TJvSplashWindow.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  Params.Style := Params.Style or WS_DLGFRAME;
end;
{$ENDIF VCL}

{$IFDEF VisualCLX}
function TJvSplashWindow.WidgetFlags: Integer;
begin
  Result := inherited WidgetFlags or Integer(WidgetFlags_WStyle_DialogBorder) or
    Integer(WidgetFlags_WStyle_Tool); 
end;
{$ENDIF VisualCLX}

function TJvSplashWindow.GetMessageText: string;
begin
  Result := FTextMessage.Caption;
end;

procedure TJvSplashWindow.SetMessageText(const Value: string);
var
  TextRect: TRect;
  VertOff: Integer;
begin
  TextRect := Rect(FTextMessage.Left, 0, Max(Screen.Width div 2 - 64,
    defTextWidth), 0);             
  {$IFDEF VisualCLX}
  Canvas.Start;
  try
  {$ENDIF VisualCLX}
    DrawText(Canvas.Handle,
      PChar(Value), - 1, TextRect, DT_CALCRECT or DT_WORDBREAK);
  {$IFDEF VisualCLX}
  finally
    Canvas.Stop;
  end;
  {$ENDIF VisualCLX}
  VertOff := (ClientHeight div 2) - ((TextRect.Bottom - TextRect.Top) div 2);
  if VertOff < 0 then
    VertOff := 10;
  TextRect.Top := VertOff;
  TextRect.Bottom := TextRect.Bottom + VertOff;
  FTextMessage.BoundsRect := TextRect;
  ClientWidth := Max(ClientWidth, TextRect.Right + defTextRight);
  ClientHeight := Max(ClientHeight, VertOff * 2);
  if Value <> FTextMessage.Caption then
  begin
    FTextMessage.Caption := Value;
    Update;
  end;
end;

procedure TJvSplashWindow.CenterFor(Form: TCustomForm);
var
  NewLeft, NewTop: Integer;
  DstRect: TRect;
begin
  if Form = nil then
    DstRect := Rect(0, 0, Screen.Width, Screen.Height)
  else
    DstRect := Form.BoundsRect;
  NewLeft := DstRect.Left + ((DstRect.Right - DstRect.Left) div 2) - (Width div 2);
  NewTop := DstRect.Top + ((DstRect.Bottom - DstRect.Top) div 2) - (Height div 2);
  SetBounds(NewLeft, NewTop, Width, Height);
end;

{$IFDEF UNITVERSIONING}
initialization
  RegisterUnitVersion(HInstance, UnitVersioning);

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}

end.