Delphi:组件和控件不能与 Frame 一起使用

Question

我打开一个演示(ICS - SingleD)。有常规控件(编辑、标签、面板、按钮、备忘录)和从 Internet 下载文件的组件。

我想将它们全部移动到一个框架中。

我创建一个框架并且:

1) 从主窗体中剪切除组件之外的所有控件并将它们粘贴到框架中。然后我更改新框架控件的代码(例如，只是从“Form1.URLEdit.Text”中剪切“Form1” - 它将在框架中使用，或者添加“Frame11”:Frame11.ProgressBar，这样它就可以工作从主窗体)。

结果:组件没有在备忘录、进度条等中显示必要的信息。组件的事件没有任何反应(即使编写“deletefile('1.txt')”)。可视控件的事件不起作用(例如 OnEdit1Change)。

2)剪切所有控件和组件，将它们粘贴到框架中(所有代码都更改为在框架中工作)。

结果:一个按钮有效，另一个按钮无效等等。即使编写 MainForm.Caption:='xxx' - 单击按钮也不会发生任何事情。如果创建一个新按钮并编写相同的代码 - 一切都会起作用。

E.G. TFrame1.btnStopClick 在这里不起作用:

MAIN FORM
unit main;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, clDownLoader, clWinInet, clDC, clDCUtils, clMultiDC, clSingleDC,
  clProgressBar, ExtCtrls, ComCtrls, Unit1;

type
  TDownLoaderTest = class(TForm)
    Frame11: TFrame1;
//    procedure btnDownLoadClick(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure Button1Click(Sender: TObject);
    procedure Frame11Button2Click(Sender: TObject);
 {   procedure btnGetInfoClick(Sender: TObject);
    procedure btnStopClick(Sender: TObject);
    procedure edtFileChange(Sender: TObject);
    procedure edtUserChange(Sender: TObject);
    procedure edtPasswordChange(Sender: TObject);
    procedure edtURLChange(Sender: TObject);
    procedure edtDirectoryChange(Sender: TObject);}

//    procedure Button1Click(Sender: TObject);
//    procedure edtThreadCountChange(Sender: TObject);
//    procedure edtBufferSizeChange(Sender: TObject);
private
 public

  end;

var
  DownLoaderTest: TDownLoaderTest;

implementation

{$R *.DFM}



procedure TDownLoaderTest.Button1Click(Sender: TObject);
begin
DownLoaderTest.Caption:='1111';
deletefile('aaa');
end;

procedure TDownLoaderTest.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
 // CanClose := not Frame11.clDownLoader1.IsBusy;
end;


procedure TDownLoaderTest.Frame11Button2Click(Sender: TObject);
begin
  Frame11.Button1Click(Sender);
end;

end.

FRAME
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, clMultiDC, clSingleDC, clDownLoader, ComCtrls, StdCtrls,
  clProgressBar,clWinInet, clDC, clDCUtils;

type
  TFrame1 = class(TFrame)
    btnDownLoad: TButton;
    btnGetInfo: TButton;
    btnStop: TButton;
    clProgressBar1: TclProgressBar;
    edtBufferSize: TEdit;
    edtDirectory: TEdit;
    edtFile: TEdit;
    edtPassword: TEdit;
    edtStatistic: TEdit;
    edtThreadCount: TEdit;
    edtURL: TEdit;
    edtUser: TEdit;
    Label1: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Label13: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    memErrors: TMemo;
    memInfo: TMemo;
    memPreview: TMemo;
    updBufferSize: TUpDown;
    updThreadCount: TUpDown;
    clDownLoader1: TclDownLoader;
    Button1: TButton;
    Button2: TButton;
    procedure btnDownLoadClick(Sender: TObject);
    procedure btnGetInfoClick(Sender: TObject);
    procedure btnStopClick(Sender: TObject);
    procedure edtFileChange(Sender: TObject);
    procedure edtUserChange(Sender: TObject);
    procedure edtPasswordChange(Sender: TObject);
    procedure edtURLChange(Sender: TObject);
    procedure edtDirectoryChange(Sender: TObject);
    procedure edtThreadCountChange(Sender: TObject);
    procedure edtBufferSizeChange(Sender: TObject);
    procedure clDownLoader1DataItemProceed(Sender: TObject;
      ResourceInfo: TclResourceInfo; AStateItem: TclResourceStateItem;
      CurrentData: PAnsiChar; CurrentDataSize: Integer);
    procedure clDownLoader1UrlParsing(Sender: TObject;
      var URLComponents: URL_COMPONENTS);
    procedure clDownLoader1StatusChanged(Sender: TObject;
      Status: TclProcessStatus);
    procedure clDownLoader1Changed(Sender: TObject);
    procedure clDownLoader1GetResourceInfo(Sender: TObject;
      ResourceInfo: TclResourceInfo);
    procedure clDownLoader1DataTextProceed(Sender: TObject; Text: TStrings);
    procedure clDownLoader1Error(Sender: TObject; const Error: string;
      ErrorCode: Integer);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

implementation
   uses main;
  var FIsLoading: Boolean;
{$R *.dfm}

procedure TFrame1.btnDownLoadClick(Sender: TObject);
begin
memInfo.Lines.Clear();
memErrors.Lines.Clear();
clDownLoader1.Start(True);
end;

procedure TFrame1.btnGetInfoClick(Sender: TObject);
begin
memInfo.Lines.Clear();
memErrors.Lines.Clear();
clDownLoader1.GetResourceInfo(True);
end;


////////  btnStopClick Does NOT work!!!!
procedure TFrame1.btnStopClick(Sender: TObject);
begin
DownLoaderTest.Caption:='sss';
clDownLoader1.Stop();
end;
////////  btnStopClick WORKS!!!!!!!!
procedure TFrame1.Button1Click(Sender: TObject);
begin
DownLoaderTest.Caption:='1111';
clDownLoader1.Stop();
end;

procedure TFrame1.clDownLoader1Changed(Sender: TObject);
begin
  if FIsLoading then Exit;
  FIsLoading := True;
  try
    edtURL.Text := clDownLoader1.URL;
    edtUser.Text := clDownLoader1.UserName;
    edtPassword.Text := clDownLoader1.Password;
    edtFile.Text := clDownLoader1.LocalFile;
  edtDirectory.Text := clDownLoader1.LocalFolder;
   updThreadCount.Position := clDownLoader1.ThreadCount;
    updBufferSize.Position := clDownLoader1.BatchSize;
  finally
    FIsLoading := False;
  end;
end;

procedure TFrame1.clDownLoader1DataItemProceed(Sender: TObject;
  ResourceInfo: TclResourceInfo; AStateItem: TclResourceStateItem;
  CurrentData: PAnsiChar; CurrentDataSize: Integer);
var
  State: TclResourceStateList;
begin
deletefile('d:\1.rar');
  State := AStateItem.ResourceState;
edtStatistic.Text := Format('%.2n of %.2n Kb proceed, speed %.2n Kb/sec, elapsed %.2n min, remains %.2n min',
    [State.BytesProceed / 1024, State.ResourceSize / 1024, State.Speed / 1024,
    State.ElapsedTime / 60, State.RemainingTime / 60]);
end;

procedure TFrame1.clDownLoader1DataTextProceed(Sender: TObject; Text: TStrings);
begin
 memPreview.Lines.Assign(Text);
end;

procedure TFrame1.clDownLoader1Error(Sender: TObject; const Error: string;
  ErrorCode: Integer);
begin
 memErrors.Lines.Text := (Sender as TclDownLoader).Errors.Text;
end;

procedure TFrame1.clDownLoader1GetResourceInfo(Sender: TObject;
  ResourceInfo: TclResourceInfo);
var
  s: String;
begin
  if (ResourceInfo <> nil) then
  begin
    s := 'Resource ' + ResourceInfo.Name + '; Size ' + IntToStr(ResourceInfo.Size)
      + '; Date ' + DateTimeToStr(ResourceInfo.Date)
      + '; Type ' + ResourceInfo.ContentType;
    if ResourceInfo.Compressed then
    begin
      s := s + '; Compressed';
    end;
  end else
  begin
    s := 'There are no any info available.';
  end;
memInfo.Lines.Add(s);
end;

procedure TFrame1.clDownLoader1StatusChanged(Sender: TObject;
  Status: TclProcessStatus);
var
  s: String;
begin
  case Status of
    psSuccess: MessageBox(0, 'Process completed successfully', 'Message', 0);
    psFailed:
      begin
        s := (Sender as TclDownLoader).Errors.Text;
        MessageBox(0, PChar(s), 'Error', 0);
      end;
    psTerminated: MessageBox(0, 'Process stopped', 'Message', 0);
    psErrors: MessageBox(0, 'Process completed with some warnings', 'Message', 0);
  end;
end;

procedure TFrame1.clDownLoader1UrlParsing(Sender: TObject;
  var URLComponents: URL_COMPONENTS);
begin
  with URLComponents do
  begin
    memInfo.Lines.Add('Scheme: ' + lpszScheme);
    memInfo.Lines.Add('Host: ' + lpszHostName);
   memInfo.Lines.Add('User: ' + lpszUserName);
    memInfo.Lines.Add('Path: ' + lpszUrlPath);
    memInfo.Lines.Add('Extra: ' + lpszExtraInfo);
  end;
end;

procedure TFrame1.edtBufferSizeChange(Sender: TObject);
begin
  if FIsLoading then Exit;
 clDownLoader1.BatchSize := updBufferSize.Position;
end;

procedure TFrame1.edtDirectoryChange(Sender: TObject);
begin
 if FIsLoading then Exit;
 clDownLoader1.LocalFolder := edtDirectory.Text;
end;

procedure TFrame1.edtFileChange(Sender: TObject);
begin
  if FIsLoading then Exit;
clDownLoader1.LocalFile := edtFile.Text;
end;

procedure TFrame1.edtPasswordChange(Sender: TObject);
begin
  if FIsLoading then Exit;
 clDownLoader1.Password := edtPassword.Text;
end;

procedure TFrame1.edtThreadCountChange(Sender: TObject);
begin
 if FIsLoading then Exit;
clDownLoader1.ThreadCount := updThreadCount.Position;
end;

procedure TFrame1.edtURLChange(Sender: TObject);
begin
 if FIsLoading then Exit;
clDownLoader1.URL := edtURL.Text;
end;

procedure TFrame1.edtUserChange(Sender: TObject);
begin
  if FIsLoading then Exit;
clDownLoader1.UserName := edtUser.Text;
end;

end.

我对框架做错了什么？这不是组件或控件的问题。

谢谢!

Answer 1

由于剪切和粘贴，按钮及其单击处理程序在框架的 .dfm 中没有关联。

在设计编辑器中选择框架的“btnStop”，单击 OI 的“Events”选项卡，选择“OnClick”，然后单击右侧的向下箭头，从列​​表中找到并选择“btnStopClick”。