unit PlayList;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls,FileCtrl,ComFunction,ComVariable,shellapi,StrUtils
  ;

type
  TForm2 = class(TForm)
    OpenDialog: TOpenDialog;
    imgBottom: TImage;
    PlayListBox: TListBox;
    imgLeft: TImage;
    imgTop: TImage;
    imgFolder: TImage;
    imgAdd: TImage;
    imgClear: TImage;
    imgDel: TImage;
    imgListExit: TImage;
    imgRight: TImage;
    procedure FormCreate(Sender: TObject);
    procedure imgFolderClick(Sender: TObject);
    procedure imgAddClick(Sender: TObject);
    procedure imgClearClick(Sender: TObject);
    procedure imgDelClick(Sender: TObject);
    procedure imgListExitClick(Sender: TObject);
    procedure imgTopMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgTopMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgBottomMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgBottomMouseLeave(Sender: TObject);
    procedure imgBottomMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgBottomMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgFolderMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgFolderMouseLeave(Sender: TObject);
    procedure imgFolderMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgAddMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgAddMouseLeave(Sender: TObject);
    procedure imgAddMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgClearMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgClearMouseLeave(Sender: TObject);
    procedure imgClearMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgDelMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgDelMouseLeave(Sender: TObject);
    procedure imgDelMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure imgListExitMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgListExitMouseLeave(Sender: TObject);
    procedure imgListExitMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure PlayListBoxDblClick(Sender: TObject);
  private
    procedure ChangeSize;
    procedure PaintRect(Y:integer);
    procedure DragAdd(FileName:string);
    Procedure DragPlay;
    procedure WMDROPFILES(var Msg: TMessage); message WM_DropFiles;
  public
    function PanleInitialization:boolean;
  end;

var
  Form2: TForm2;
  Pos:TPoint;
  intStart,intEnd,TempY:integer;
  IsChange:boolean;

implementation

uses main;
{$R *.dfm}

procedure TForm2.DragPlay;
begin
  PlayIndex:=PlayListBox.Items.Count-1;
  PlayListBox.ItemIndex:=PlayIndex;
  form1.StopPlay;
  form1.playfile;
end;
procedure TForm2.DragAdd(FileName:string);
var
  temp:string;
  I:integer;
begin
  if AnsiContainsText(UpperCase(OpenDirFilter),UpperCase(extractfileext(FileName))) then
  begin
    lstFilePath.Add(FileName);
    i:=LastDelimiter('\',FileName);
    temp:=copy(FileName,i+1,length(FileName));
    temp:=Copy(temp,1,Length(temp)-4);
    lstTitle.Add(temp);
    playlistbox.Items.Add(temp);
  end
  else
  begin
    ShowMessage('不支持 '+extractfileext(FileName)+' 格式');
    Exit;
  end;
  if not IsPlay then DragPlay;
end;
procedure tform2.WMDROPFILES(var Msg: TMessage);
var
  pcFileName: PChar;
  i, iSize, iFileCount: integer;
begin
  pcFileName := ''; // 避免編輯時出現警告
  iFileCount := DragQueryFile(Msg.WParam, $FFFFFFFF, pcFileName, 255);
  for i := 0 to iFileCount - 1 do
  begin
    iSize := DragQueryFile(Msg.WParam, i, nil, 0) + 1;
    pcFileName := StrAlloc(iSize);
    DragQueryFile(Msg.WParam, i, pcFileName, iSize);
    if FileExists(pcFileName) then
      DragAdd(pcFileName); // 看你要怎　處理這個接收到的檔名
    StrDispose(pcFileName);
  end;
  DragFinish(Msg.WParam);
end;

procedure TForm2.PaintRect(Y:integer);
var
  DC:HDC;
  can:TCanVas;
  R:TRect;
begin
  DC:=GetDC(0);
  Can:=TCanvas.Create;
  Can.Handle:=DC;

  R.Top:=self.Top;
  R.Left:=self.Left;
  R.Right:=self.Left+self.Width;
  R.Bottom:=Y;

  Can.DrawFocusRect(R);

  ReleaseDC(0,DC);
  Can.Free;
end;

procedure TForm2.FormCreate(Sender: TObject);
var
  I:integer;
  Temp:String;
begin

  self.Top:=playlistPos.Y;
  self.Left:=playlistPos.X;
  PanleInitialization;
  LoadPlayList;

  playlistbox.Items.Clear;
  
  for I := 0 to lstFilePath.Count - 1 do
  begin
    if trim(lstTitle[I])<>'' then
    begin
      playlistbox.Items.Add(lstTitle[I]);
    end
    else
    begin
      Temp:=lstFilepath[I];
      temp:=copy(temp,(LastDelimiter('\',temp))+1,length(temp));
      temp:=Copy(temp,1,Length(temp)-4);
      playlistbox.Items.Add(temp);
    end;
  end;
  playlistbox.ItemIndex:=playindex;

  if IsShowList then show
  else hide;

  DragAcceptFiles(PlayListBox.Handle,true);
  if Paramcount > 0 then
    DragAdd(paramstr(1));
end;

procedure TForm2.imgAddClick(Sender: TObject);
var
  temp:string;
begin
  opendialog.Filter:=OpenFilter;
  if opendialog.Execute then
  begin
    temp:=opendialog.FileName;
    lstFilePath.Add(temp);
    temp:=copy(temp,(LastDelimiter('\',temp))+1,length(temp));
    temp:=Copy(temp,1,Length(temp)-4);
    lstTitle.Add(temp);
    playlistbox.Items.Add(temp);
  end;
end;

procedure TForm2.imgAddMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Painting(imgAdd,ConBoxInfo,3);
end;

procedure TForm2.imgAddMouseLeave(Sender: TObject);
begin
  Painting(imgAdd,ConBoxInfo,0);
end;

procedure TForm2.imgAddMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Painting(imgAdd,ConBoxInfo,2);
end;

procedure TForm2.imgBottomMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  StartPos:TPoint;
begin
  if not(shift=[ssleft]) then Exit;

  if ((imgBottom.Height-Y)>0)
    and ((imgBottom.Height-Y)<5) then
  begin
    GetCursorPos(StartPos);
    intStart:=Startpos.Y;
    TempY:=-1;
    PaintRect(intStart);
    IsChange:=true;
  end;
end;
procedure TForm2.imgBottomMouseLeave(Sender: TObject);
begin
  Screen.cursor:=crDefault;
end;

procedure TForm2.imgBottomMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var
  MovePos:TPoint;
begin
  if IsChange then
  begin
     if shift=[ssleft] then
     begin
       GetCursorPos(MovePos);
       if TempY<>-1 then
          PaintRect(TempY);
       intEnd:=MovePos.Y;
       TempY:=intEnd;
       PaintRect(intEnd);
       Exit;
     end;
  end;

  if ((imgBottom.Height-Y)>0)
  and ((imgBottom.Height-Y)<5) then
     Screen.cursor:=crVSplit
  else Screen.cursor:=crDefault;
end;

procedure TForm2.imgBottomMouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin

  Screen.cursor:=crDefault;
  if IsChange then
  begin
    InvalidateRect(0,nil,TRUE);//刷新桌面

    IsChange:=false;
    ListLength:=ListLength+(intEnd-intStart);
    if ListLength<50 then ListLength:=50;
    ChangeSize;
  end;
end;
procedure TForm2.imgClearClick(Sender: TObject);
begin
  playlistbox.Items.Clear;
  lstTitle.Clear;
  lstFilePAth.Clear;
end;

procedure TForm2.imgClearMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Painting(imgClear,ConBoxInfo,3);
end;

procedure TForm2.imgClearMouseLeave(Sender: TObject);
begin
  Painting(imgClear,ConBoxInfo,0);
end;

procedure TForm2.imgClearMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Painting(imgClear,ConBoxInfo,2);
end;

procedure TForm2.imgDelClick(Sender: TObject);
begin
  if playlistbox.ItemIndex=-1 then Exit;
  lstFilePath.Delete(playlistbox.ItemIndex);
  lstTitle.Delete(playlistbox.ItemIndex);
  playlistbox.Items.Delete(playlistbox.ItemIndex);
end;

procedure TForm2.imgDelMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Painting(imgDel,ConBoxInfo,3);
end;

procedure TForm2.imgDelMouseLeave(Sender: TObject);
begin
  Painting(imgDel,ConBoxInfo,0);
end;

procedure TForm2.imgDelMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Painting(imgDel,ConBoxInfo,2);
end;

procedure TForm2.imgFolderClick(Sender: TObject);
var
  sDir,sInfo,temp:string;
  I:integer;
begin
  sInfo:='打開文件'+#10#13+'加載所選文件夾以及子文件夾所有符合要求的文件'
  +#10#13+OpenDirFilter;
  if SelectDirectory(sInfo,'',sDir) then
  begin
    MakeFileList(sDir,OpenDirFilter,'',false);
    PlayListBox.Items.Clear;
    for I := 0 to lstFilePath.Count - 1 do
    begin
      temp:=lstFilepath[I];
      temp:=copy(temp,(LastDelimiter('\',temp))+1,length(temp));
      temp:=Copy(temp,1,Length(temp)-4);
      lstTitle.Add(temp);
      playlistbox.Items.Add(temp);
    end;
  end;
end;

procedure TForm2.imgFolderMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Painting(imgfolder,ConBoxInfo,3);
end;

procedure TForm2.imgFolderMouseLeave(Sender: TObject);
begin
  Painting(imgfolder,ConBoxInfo,0);
end;

procedure TForm2.imgFolderMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Painting(imgfolder,ConBoxInfo,2);
end;

procedure TForm2.imgListExitClick(Sender: TObject);
begin
  hide;
  IsShowList:=false;
end;

procedure TForm2.imgListExitMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  Painting(imglistExit,ConBoxInfo,3);
end;

procedure TForm2.imgListExitMouseLeave(Sender: TObject);
begin
  Painting(imglistExit,ConBoxInfo,0);
end;

procedure TForm2.imgListExitMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Painting(imglistExit,ConBoxInfo,2);
end;

procedure TForm2.imgTopMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  pos.X:=X;pos.Y:=Y;
end;

procedure TForm2.imgTopMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  if Shift=[ssleft] then
  begin
  if conglutinate=false then
  begin
    Form2.Left:=Form2.Left+(X-pos.X);
    Form2.Top:=Form2.Top+(Y-pos.Y);
    if (abs(form2.Top-form1.Top-form1.Height)<20)and
        (abs(form2.Left-form1.Left)<20) then
    begin
      form2.Top:=form1.Top+form1.Height;
      form2.Left:=form1.left;
      conglutinate:=true;
    end;
  end;
  if conglutinate=true then
  begin
    if (abs(pos.X-X)>20)or
        (abs(pos.Y-Y)>20) then
    begin
      Form2.Left:=Form2.Left+(X-pos.X);
      Form2.Top:=Form2.Top+(Y-pos.Y);
      conglutinate:=false;
    end;
  end;
  end;
end;

function TForm2.PanleInitialization:boolean;
var
  I:integer;
begin
  Result:=true;

  setLength(ConBoxInfo,self.ControlCount);

  for I := 0 to ControlCount - 1 do
    if Controls[I] is TImage then Controls[I].Create(Controls[I].Parent);

  if not FaceInitialization(self,path+skinpath+'List.ini',ConBoxInfo) then
  begin
    Result:=False;
    Exit;
  end;

  self.TransparentColor:=tran;
  self.TransparentColorValue:=BackColor;
  playlistbox.Color:=ListBackColor;
  playlistbox.Font.Size:=fontsize;
  playlistbox.Font.Color:=FontColor;
  form2.Width:=imgtop.Width;
  form2.Height:=imgtop.Height+imgbottom.Height+ListLength;
  ChangeSize;
  LoadTitle(imgtop,PlayListTitle);

  update;
end;

procedure TForm2.PlayListBoxDblClick(Sender: TObject);
begin
  if playlistbox.ItemIndex>=0 then
  begin
    PlayIndex:=playlistbox.ItemIndex;
    form1.StopPlay;
    form1.playfile;
  end;
end;

procedure TForm2.ChangeSize;
begin
  form2.Height:=imgtop.Height+imgbottom.Height+ListLength;
  imgbottom.Top:=form2.Height-imgbottom.Height;
  imgleft.Top:=imgtop.Height;
  imgleft.Height:=ListLength;
  imgright.Top:=imgtop.Height;
  imgright.Left:=form2.Width-imgright.Width;
  imgright.Height:=ListLength;
  playlistbox.Top:=imgtop.Height;
  playlistbox.Left:=imgleft.Width;
  playlistbox.Width:=abs(playlistbox.Left-imgright.Left);
  playlistbox.Height:=abs(playlistbox.Top-imgbottom.Top);
end;

end.