uviewlayer.pas

用DELPHI 和MAPX的基础练习.是学习的好资料

unit UViewLayer;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TFViewLayer = class(TForm)
    ComboBox1: TComboBox;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    procedure FormShow(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FViewLayer: TFViewLayer;

implementation

uses UMap;

{$R *.dfm}

procedure TFViewLayer.FormShow(Sender: TObject);
var
i: integer;
begin
  ComBoBox1.Items.Add('全部图层');
  for i:=1 to Fmap.Map1.Layers.Count do
    begin
      ComBoBox1.Items.Add(Fmap.Map1.Layers[i].Name);
    end;
ComboBox1.ItemIndex:=0;
end;

procedure TFViewLayer.Button2Click(Sender: TObject);
begin
close;
end;

procedure TFViewLayer.Button1Click(Sender: TObject);
begin
  if ComBoBox1.ItemIndex = 0 then
     begin
       FMap.Map1.Bounds:=FMap.Map1.Layers.Bounds;
     end
  else
    begin
      FMap.Map1.Bounds:=Fmap.Map1.Layers[ComBoBox1.Text].Bounds;
    end;
end;

end.