unit1.pas

Delphi7应用编程150例附书源码.rar

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ImgList, ComCtrls, Menus;

type
  TForm1 = class(TForm)
    ListView1: TListView;
    ImageList1: TImageList;
    procedure ListView1DragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure ListView1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure ListView1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ListView1DragOver(Sender, Source: TObject; X, Y: Integer;
  State: TDragState; var Accept: Boolean);
begin
    Accept:=Source is TListView
end;

procedure TForm1.ListView1DragDrop(Sender, Source: TObject; X, Y: Integer);
var
  PosPoint:TPoint;
begin
  PosPoint.x:=x;
  PosPoint.y:=Y;
  (Source As TListView).Selected.SetPosition(PosPoint);
end;

procedure TForm1.ListView1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  if button=mbleft then
  begin
    with sender as TListview do
    begin
      if GetItemAt(x,y)<>nil then
        begindrag(false);
    end;
  end;

end;

end.