unit umain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,
  ExtCtrls, ImageEnView, ComCtrls, ieSettings, ieview, hyieutils, iexBitmaps, hyiedefs, iexLayers, iexRulers;

type
  TForm1 = class(TForm)
    ImageEnView1: TImageEnView;
    Panel1: TPanel;
    btnNextTransition: TButton;
    btnFullScreen: TButton;
    Label1: TLabel;
    Label2: TLabel;
    lblTransName: TLabel;
    spnTransition: TUpDown;
    btnShowTransition: TButton;
    lblTrans: TLabel;
    grpWordTransition: TGroupBox;
    lblWord: TLabel;
    cmbFont: TComboBox;
    edtWord: TEdit;
    chkBold: TCheckBox;
    grOptions: TGroupBox;
    chkDrawAlternative: TCheckBox;
    lblDuration: TLabel;
    spnDuration: TUpDown;
    lblDrawAlternative: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure btnNextTransitionClick(Sender: TObject);
    procedure btnFullScreenClick(Sender: TObject);
    procedure ImageEnView1KeyPress(Sender: TObject; var Key: Char);
    procedure spnTransitionClick(Sender: TObject; Button: TUDBtnType);
    procedure btnShowTransitionClick(Sender: TObject);
    procedure chkDrawAlternativeClick(Sender: TObject);
    procedure cmbFontChange(Sender: TObject);
    procedure spnDurationClick(Sender: TObject; Button: TUDBtnType);
  private
    { Private declarations }
    FCurrentImage : Integer;
    FCurrentTransition : Integer;   
    Fleft, Ftop, Fwidth, Fheight: integer;
    
    procedure ShowNextTransition(bNext: boolean);
    procedure ShowCurrentTransition;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses
  iexTransitions;

{$R *.DFM}
{$R WindowsTheme.res}

procedure TForm1.ShowNextTransition(bNext: boolean);
begin
  if bNext then
  begin
    Inc(FCurrentTransition);
    if FCurrentTransition in [2, 3] then
      FCurrentTransition := 4; { Ignore transition # 2 and 3 }
  end
  else
  begin
    Dec(FCurrentTransition); 
    if FCurrentTransition in [2, 3] then
      FCurrentTransition := 1; { Ignore transition # 2 and 3 }
  end;

  if FCurrentTransition < 1 then
    FCurrentTransition := MAX_TRANSITIONS  // wrap around
  else
  if FCurrentTransition > MAX_TRANSITIONS then
    FCurrentTransition := 1;

  ShowCurrentTransition;
end;


procedure TForm1.ShowCurrentTransition;
var
  bWordTransition: Boolean;
begin
  // Display
  lblTransName.caption := IETransitionList[FCurrentTransition].name;
  Caption := 'Transition: ' + IETransitionList[FCurrentTransition].name;  
  lblTrans.Caption := 'Transition #: ' + IntToStr(FCurrentTransition);
  
  chkDrawAlternative.Enabled := TIETransitionType(FCurrentTransition) in Transitions_Supporting_TransitionsDrawAlternative;
  lblDrawAlternative.Enabled := chkDrawAlternative.Enabled;

  // Word transition controls
  bWordTransition := TIETransitionType(FCurrentTransition) in Transitions_Supporting_Word;
  grpWordTransition .Enabled := bWordTransition;
  cmbFont           .Enabled := bWordTransition;
  edtWord           .Enabled := bWordTransition;
  chkBold           .Enabled := bWordTransition;
  lblWord           .Enabled := bWordTransition;

  // Get next image index
  inc(FCurrentImage);
  if FCurrentImage > 3 then
    FCurrentImage := 0;

  // Set properties for Word transitions
  IEGlobalSettings().WordTransitionParams.Word := edtWord.Text;
  IEGlobalSettings().WordTransitionParams.FontName := cmbFont.Text;
  if chkBold.checked then
    IEGlobalSettings().WordTransitionParams.Style := [fsBold]
  else
    IEGlobalSettings().WordTransitionParams.Style := [];

  // Set general options
  IEGlobalSettings().TransitionsDrawAlternative := chkDrawAlternative.checked;

  // Prepare ImageEnView1 for a transition (e.g. so loading the image will not immediately update the display
  ImageEnView1.PrepareTransition;

  // Load the next image
  ImageEnView1.io.LoadFromFile(extractfilepath(ParamStr(0)) + inttostr(FCurrentImage) + '.jpg');

  // Run the transition
  ImageEnView1.RunTransition( TIETransitionType(FCurrentTransition) , spnDuration.Position);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  FCurrentImage := -1;
  FCurrentTransition := 1;
  ShowCurrentTransition;
end;


procedure TForm1.btnNextTransitionClick(Sender: TObject);
begin
  ShowNextTransition(True);
end;


procedure TForm1.btnFullScreenClick(Sender: TObject);
begin
  Fleft := Left;
  Ftop := Top;
  Fwidth := Width;
  Fheight := Height;
  Panel1.Hide;
  ImageEnView1.BorderStyle := bsNone;
  WindowState := wsMaximized;
  BorderStyle := bsNone;
  ImageEnView1.SetFocus;
end;


procedure TForm1.ImageEnView1KeyPress(Sender: TObject; var Key: Char);
const
  VK_ESC = #27;
begin
  if Key = VK_ESC then
  begin
    BorderStyle := bsSizeable;
    WindowState := wsNormal;
    ImageEnView1.BorderStyle := bsSingle;
    Panel1.Show;
    SetBounds(Fleft, Ftop, Fwidth, Fheight);
  end;
end;

procedure TForm1.spnTransitionClick(Sender: TObject; Button: TUDBtnType);
begin
  case Button of
    btNext : ShowNextTransition(True);
    btPrev : ShowNextTransition(false);
  end;
end;

procedure TForm1.btnShowTransitionClick(Sender: TObject);
begin
  ShowCurrentTransition;
end;

procedure TForm1.chkDrawAlternativeClick(Sender: TObject);
begin
  ShowCurrentTransition;
end;

procedure TForm1.cmbFontChange(Sender: TObject);
begin
  edtWord.Font.Name := cmbFont.Text;
end;

procedure TForm1.spnDurationClick(Sender: TObject; Button: TUDBtnType);
begin          
  lblDuration.Caption := 'Duration: ' + IntToStr(spnDuration.Position) + ' msec';
end;

end.