unit Unit1; 

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, ExtCtrls,
  ugradbtn, StdCtrls, ComCtrls, LCLType, LCLProc, LCLIntf, Buttons, ugradtabcontrol,
  Menus, Spin, EditBtn;

type

  TTryOutPage = class(TGradTabPage)
  
  end;

  { TForm1 }

  TForm1 = class(TForm)
    Button2: TButton;
    Button3: TButton;
    CheckBox1: TCheckBox;
    CheckGroup1: TCheckGroup;
    ComboBox1: TComboBox;
    Edit1: TEdit;
    GradButton1: TGradButton;
    GradTabPage1: TGradTabPage;
    GradTabPage2: TGradTabPage;
    GradTabPage3: TGradTabPage;
    GradTabPage4: TGradTabPage;
    ImageList1: TImageList;
    Label1: TLabel;
    NewPageBtn: TGradButton;
    DeleteBtn: TGradButton;
    GradTabControl1: TGradTabControl;
    Memo2: TMemo;
    MenuItem1: TMenuItem;
    PageControl1: TPageControl;
    Panel1: TPanel;
    Panel2: TPanel;
    Panel3: TPanel;
    PopupMenu1: TPopupMenu;
    RadioGroup1: TRadioGroup;
    SpinEdit2: TSpinEdit;
    TabSheet1: TTabSheet;
    TabSheet2: TTabSheet;
    TabSheet3: TTabSheet;
    ToggleBox2: TToggleBox;
    procedure CheckBox1Click(Sender: TObject);
    procedure CheckGroup1Click(Sender: TObject);
    procedure CheckGroup1ItemClick(Sender: TObject; Index: integer);
    procedure ComboBox1Change(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure DeleteBtnClick(Sender: TObject);
    procedure GradButton1Click(Sender: TObject);
    procedure GradTabControl1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure GradTabControl1DragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure GradTabControl1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure GradTabControl1MouseWheelDown(Sender: TObject;
      Shift: TShiftState; MousePos: TPoint; var Handled: Boolean);
    procedure GradTabControl1MouseWheelUp(Sender: TObject; Shift: TShiftState;
      MousePos: TPoint; var Handled: Boolean);
    procedure GradTabControl1PageChanged(Sender: TObject);
    procedure GradTabControl1TabButtonMouseDown(
      GradTabControl: TGradTabControl; Button: TMouseButton;
      Shift: TShiftState; X, Y, AIndex: Integer);
    procedure GradTabControl1TabButtonMouseMove(
      GradTabControl: TGradTabControl; Shift: TShiftState; X, Y, AIndex: Integer
      );
    procedure GradTabControl1TabButtonMouseUp(GradTabControl: TGradTabControl;
      Button: TMouseButton; Shift: TShiftState; X, Y, AIndex: Integer);
    procedure ImageList1Change(Sender: TObject);
    procedure NewPageBtnClick(Sender: TObject);
    procedure PageControl1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure PageControl1DragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure RadioGroup1Click(Sender: TObject);
    procedure SpinEdit2EditingDone(Sender: TObject);
  private
    { private declarations }
  public
    FDragIndex : Integer;
    { public declarations }
  end;

var
  Form1: TForm1; 

implementation

{ TForm1 }

procedure TForm1.FormCreate(Sender: TObject);
begin
  GradTabControl1.Align:=alClient;
  GradTabControl1.TabPosition:=tpTop;
  SpinEdit2.Value:=GradTabControl1.TabHeight;

  GradTabControl1.Images := ImageList1;
  GradTabControl1.Page[0].ImageIndex:=0;
  GradTabControl1.Page[0].TabButton.ShowGlyph:=true;
  //GradTabControl1.PagesBar.MoveToNext;

  ComboBox1.Items.Assign(GradTabControl1.Tabs);
end;

procedure TForm1.CheckBox1Click(Sender: TObject);
begin
  GradTabControl1.LongTabs:=CheckBox1.Checked;
  //SpinEdit1.Enabled:=CheckBox1.Checked;
  Edit1.Enabled:=CheckBox1.Checked;
  GradButton1.Enabled:=CheckBox1.Checked;

  Edit1.Text:=IntToStr(GradTabControl1.LongWidth);
end;

procedure TForm1.CheckGroup1Click(Sender: TObject);
begin

end;

procedure TForm1.CheckGroup1ItemClick(Sender: TObject; Index: integer);
begin
  with GradTabControl1 do begin
  case Index of
     0 : AutoShowScrollButtons := CheckGroup1.Checked[0];
     1 : ShowLeftTopScrollButton := CheckGroup1.Checked[1];
     2 : ShowRightBottomScrollButton := CheckGroup1.Checked[2];
  end;

      CheckGroup1.Checked[0] := AutoShowScrollButtons;
      CheckGroup1.Checked[1] := ShowLeftTopScrollButton;
      CheckGroup1.Checked[2] := ShowRightBottomScrollButton;
  end;
end;

procedure TForm1.ComboBox1Change(Sender: TObject);
begin
   GradTabControl1.PageIndex:=GradTabControl1.Tabs.IndexOf(ComboBox1.Text);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
   GradTabControl1.Free;
end;

procedure TForm1.DeleteBtnClick(Sender: TObject);
var
   C : Integer;
   T : String;
begin
  T := ComboBox1.Text;
  C := GradTabControl1.Tabs.IndexOf(T);

  DebugLn('Text=%s Index=%d',[T,ComboBox1.Items.IndexOf(T)]);

  if (C < GradTabControl1.PageList.Count) AND (GradTabControl1.PageList.Count<>0) then
  begin
     ComboBox1.Items.Delete(ComboBox1.Items.IndexOf(T));
     GradTabControl1.Tabs.Delete(C);

  end;
end;

procedure TForm1.GradButton1Click(Sender: TObject);
begin
  GradTabControl1.LongWidth := StrToInt(Edit1.Text);

  Edit1.Text:=IntToStr(GradTabControl1.LongWidth);
end;

procedure TForm1.GradTabControl1DragDrop(Sender, Source: TObject; X, Y: Integer
  );
var
   SenderBtn, SourceBtn : TGradTabPageButton;
   SenderPage, SourcePage : TGradTabPage;
begin
   DebugLn('Drop Name=%s',[Sender.ClassName]);

   if not (Sender is TGradTabPageButton) then Exit;

   SenderBtn := Sender as TGradTabPageButton;

   SenderPage:= SenderBtn.Owner as TGradTabPage;
   SourcePage:= GradTabControl1.Page[FDragIndex];

   if Sender = Source then Exit;
   if SourcePage.PageIndex=SenderPage.PageIndex then Exit;

   SourcePage.PageIndex:=SenderPage.PageIndex;

   //if (Sender is TGradTabControl) then Accept := True;
end;

procedure TForm1.NewPageBtnClick(Sender: TObject);
var
   C,R,G,B : Integer;
   newName : String;
begin
  C := -1;

  repeat
     Inc(C);
     newName := 'tab_'+IntToStr(C);
  until(GradTabControl1.Tabs.IndexOf(newName)=-1);
  GradTabControl1.Tabs.Add(newName);

  Randomize;

  R := Random(255)+1;
  G := Random(255)+1;
  B := Random(255)+1;

  //WriteLn(R, ' ', G, ' ', B, ColorToString(RGBToColor(R,G,B)));
  GradTabControl1.ActivePage.Caption:='tab_'+IntToStr(C);
  //GradTabControl1.CurrentPage.Color:=RGBToColor(R, G, B);
  GradTabControl1.ActivePage.TabPopupMenu := PopupMenu1;
  GradTabControl1.ActivePage.PopupMenu:= PopupMenu1;

  ComboBox1.ItemIndex:=ComboBox1.Items.Add('tab_'+IntToStr(C));
end;

procedure TForm1.GradTabControl1DragOver(Sender, Source: TObject; X,
  Y: Integer; State: TDragState; var Accept: Boolean);
var
   SenderBtn, SourceBtn : TGradTabPageButton;
   SenderPage, SourcePage : TGradTabPage;
begin
   //DebugLn('Name=%s',[Sender.ClassName]);
   Accept := false;
   if (Sender is TGradTabPageButton) then Accept := True;
end;

procedure TForm1.GradTabControl1MouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
  DebugLn('MouseDown on %s',[Sender.ClassName]);
end;

procedure TForm1.GradTabControl1MouseWheelDown(Sender: TObject;
  Shift: TShiftState; MousePos: TPoint; var Handled: Boolean);
var
   NewNum : Integer;
begin
   NewNum:= GradTabControl1.PageIndex;
   Inc(NewNum);
   GradTabControl1.PageIndex:=NewNum;
end;

procedure TForm1.GradTabControl1MouseWheelUp(Sender: TObject;
  Shift: TShiftState; MousePos: TPoint; var Handled: Boolean);
var
   NewNum : Integer;
begin
   NewNum:= GradTabControl1.PageIndex;
   Dec(NewNum);
   GradTabControl1.PageIndex:=NewNum;
end;

procedure TForm1.GradTabControl1PageChanged(Sender: TObject);
begin
  with GradTabControl1 do
     ComboBox1.Text:=Tabs[PageIndex];
end;

procedure TForm1.GradTabControl1TabButtonMouseDown(
  GradTabControl: TGradTabControl; Button: TMouseButton; Shift: TShiftState; X,
  Y, AIndex: Integer);
begin
  DebugLn('MouseDown - BeginDrag');
  if ssCtrl in Shift then begin
     GradTabControl1.BeginDrag(False);
     FDragIndex:=AIndex;
  end;
end;

procedure TForm1.GradTabControl1TabButtonMouseMove(
  GradTabControl: TGradTabControl; Shift: TShiftState; X, Y, AIndex: Integer);
begin

end;

procedure TForm1.GradTabControl1TabButtonMouseUp(
  GradTabControl: TGradTabControl; Button: TMouseButton; Shift: TShiftState; X,
  Y, AIndex: Integer);
begin
  //ShowMessage('TabMouseUp: Index: '+IntToStr(AIndex)+' Caption: '+GradTabControl.Page[AIndex].Caption);

  if Button=mbMiddle then
  begin
      //GradTabControl.Tabs.Delete(AIndex);
      GradTabControl.Page[AIndex].Free;
  end;
end;

procedure TForm1.ImageList1Change(Sender: TObject);
begin

end;

procedure TForm1.PageControl1DragDrop(Sender, Source: TObject; X, Y: Integer);
const
   TCM_GETITEMRECT = $130A;
var
   TabRect: TRect;
   j: Integer;
begin
   if (Sender is TGradTabControl) then
   for j := 0 to GradTabControl1.PageCount - 1 do
   begin
     //GradTabControl1.Perform(TCM_GETITEMRECT, j, LParam(@TabRect)) ;
     TabRect := GradTabControl1.GetTabRect(j);
     DebugLn('X=%d Y=%d T.L=%d T.T=%d T.R=%d T.B=%d',[X,Y,TabRect.Left, TabRect.Top, TabRect.Right, TabRect.Bottom]);
     if PtInRect(TabRect, Point(X, Y)) then
     begin
       if GradTabControl1.ActivePage.PageIndex <> j then
         GradTabControl1.ActivePage.PageIndex := j;
       Exit;
     end;
   end;
end;

procedure TForm1.PageControl1DragOver(Sender, Source: TObject; X, Y: Integer;
  State: TDragState; var Accept: Boolean);
begin
   DebugLn('Name=%s',[Sender.ClassName]);
   if (Sender is TGradTabControl) then Accept := True;
end;

procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
  case RadioGroup1.ItemIndex of
       0: GradTabControl1.TabPosition := tpTop;
       1: GradTabControl1.TabPosition := tpBottom;
       2: GradTabControl1.TabPosition := tpLeft;
       3: GradTabControl1.TabPosition := tpRight;
  end;
end;

procedure TForm1.SpinEdit2EditingDone(Sender: TObject);
begin
  GradTabControl1.TabHeight:=SpinEdit2.Value;
end;

initialization
  {$I unit1.lrs}

end.