DelphiXE8FMX工程实现无边框托动(FMX内部方法)

注意：

可以实现效果，但不知道我的用法对不对(或着说是不是最优化的用法)，望高手们指教。

实例代码：

unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.Objects;

type
  TForm1 = class(TForm)
    Image1: TImage;
    procedure Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Single);
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Single);
    procedure Image1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Single);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}
var IsDrag: Boolean;

procedure TForm1.FormShow(Sender: TObject);
begin
  Self.BorderStyle := TFmxFormBorderStyle.None; //窗体样式
  Image1.WrapMode := TImageWrapMode.Stretch; //图片加载方式
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  IsDrag := False;
end;

procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Single);
begin
  if ssLeft in Shift then
  begin
    IsDrag := True;
  end;
end;

procedure TForm1.Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Single);
begin
  if IsDrag = True then
    Self.StartWindowDrag
  else
  begin
    //
  end;
end;

procedure TForm1.Image1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Single);
begin
  IsDrag := False;
end;

end.