TFileListBox.PopupMenu Property

Identifies the pop-up menu associated with the control.

Pascal

property PopupMenu: TPopupMenu;

C++

__property TPopupMenu PopupMenu;

Description

Assign a value to PopupMenu to make a pop-up menu appear when the user selects the control and clicks the right mouse button. If the TPopupMenu's AutoPopup property is true, the pop-up menu appears automatically. If the menu's AutoPopup property is false, display the menu with a call to its Popup method from the control's OnContextPopup event handler.

C++ Examples:

Copy Code

/*
This example uses two edit boxes and one pop-up menu on a form.
The pop-up menu contains Cut, Copy, and Paste commands. This code
makes the pop-up menu available to both edit boxes:
*/
void __fastcall TForm1::FormCreate(TObject *Sender)
{
  PopupMenu1->AutoPopup = true;
  Edit1->PopupMenu = PopupMenu1;
  Edit2->PopupMenu = PopupMenu1;
}

/*
These are the cut, copy, and paste OnClick events for the commands
on the pop-up menu. Double click on the pop-up menu and add three
TMenuItems.  Then set the captions to "Cut", "Copy" and "Paste".
The names will be automatically set to "Cut1", "Copy1", and
"Paste1".  Then double click on the OnClick events and they will
be named "Cut1Click", "Copy1Click" and "Paste1Click" respectively.
Note: only the selected portion of the string in the edit box will
be copied, cut or replaced.
*/
void __fastcall TForm1::Copy1Click(TObject *Sender)
{
  TComponent *pComponent = PopupMenu1->PopupComponent;
  if (pComponent)
  {
    if (pComponent->ClassNameIs("TEdit"))
      ((TEdit *)pComponent)->CopyToClipboard();
    else
      MessageBeep(0);
  }
  else
    MessageBeep(0);
}

void __fastcall TForm1::Cut1Click(TObject *Sender)
{
  TComponent *pComponent = PopupMenu1->PopupComponent;
  if (pComponent)
  {
    if (pComponent->ClassNameIs("TEdit"))
      ((TEdit *)pComponent)->CutToClipboard();
    else
      MessageBeep(0);
  }
  else
    MessageBeep(0);
}

void __fastcall TForm1::Paste1Click(TObject *Sender)
{
  TComponent *pComponent = PopupMenu1->PopupComponent;
  if (pComponent)
  {
    if (pComponent->ClassNameIs("TEdit"))
      ((TEdit *)pComponent)->PasteFromClipboard();
    else
      MessageBeep(0);
  }
  else
    MessageBeep(0);
}

Copy Code

/*
This example demonstrates how to add and delete menu items
to a popup menu at runtime and assign an event handler to
the OnClick event.  Place a TPopupMenu and three buttons on
the form named "AddButton", "EditButton",  and
"DestroyButton" and add OnClick events to all three buttons.
Put the TPopupMenu in the PopupMenu property of the form.
Place the PopupMenuItemsClick procedure in the TForm1 type
declaration so that it can be used as the method call for
the menu item OnClick event.
*/
void __fastcall TForm1::AddButtonClick(TObject *Sender)
{
    const int num_items = 4;
    for (int index = 0; index < num_items; ++index)
    {
        TMenuItem *NewItem = new TMenuItem(PopupMenu1); // create the new item
        PopupMenu1->Items->Add(NewItem);// add it to the Popupmenu
        NewItem->Caption = "Menu Item " + IntToStr(index);
        NewItem->Tag = index;
        NewItem->OnClick = PopupMenuItemsClick;// assign it an event handler
        TNotifyEvent();
    }
}

void __fastcall TForm1::PopupMenuItemsClick(TObject *Sender)
{
    TMenuItem *ClickedItem = dynamic_cast<TMenuItem *>(Sender);
    if (ClickedItem)
    {
        switch (ClickedItem->Tag)
        {
            case 0:
            {
                ShowMessage("first item clicked");
                break;
            }
            case 1:
            {
                ShowMessage("second item clicked");
                break;
            }
            case 2:
            {
                ShowMessage("third item clicked");
                break;
            }
            case 3:
            {
                ShowMessage("fourth item clicked");
                break;
            }
        }
    }
}

/*
To edit or destroy an item, grab its pointer via the Items
property.
*/
void __fastcall TForm1::EditButtonClick(TObject *Sender)
{
    const int index = 1;
    TMenuItem *ItemToEdit = PopupMenu->Items->Items[index];
    ItemToEdit->Caption = "Changed Caption";
}

void __fastcall TForm1::DestroyButtonClick(TObject *Sender)
{
    const int index = 2;
    TMenuItem *ItemToDelete = PopupMenu->Items->Items[index];
    delete ItemToDelete;
}

Delphi Examples:

Copy Code

{
This example uses two edit boxes and one pop-up menu on a form.
The pop-up menu contains Cut, Copy, and Paste commands. This code
makes the pop-up menu available to both edit boxes:
} 
procedure TForm1.FormCreate(Sender: TObject);
begin
  PopupMenu1.AutoPopup := True;
  Edit1.PopupMenu := PopupMenu1;
  Edit2.PopupMenu := PopupMenu1;
end;

{
These are the cut, copy, and paste OnClick events for the commands
on the pop-up menu. Double click on the pop-up menu and add three
TMenuItems.  Then set the captions to "Cut", "Copy" and "Paste".
The names will be automatically set to "Cut1", "Copy1", and
"Paste1".  Then double click on the OnClick events and they will
be named "Cut1Click", "Copy1Click" and "Paste1Click" respectively.
Note: only the selected portion of the string in the edit box will
be copied, cut or replaced.
}
procedure TForm1.Copy1Click(Sender: TObject);
begin
  if PopupMenu1.PopupComponent = Edit1 then
   Edit1.CopyToClipboard
  else if PopupMenu1.PopupComponent = Edit2 then
    Edit2.CopyToClipboard
  else
    Beep;
end;

procedure TForm1.Cut1Click(Sender: TObject);
begin
  if PopupMenu1.PopupComponent = Edit1 then
    Edit1.CutToClipboard
  else if PopupMenu1.PopupComponent = Edit2 then
    Edit2.CutToClipboard
  else
    Beep;
end;

procedure TForm1.Paste1Click(Sender: TObject);
begin
  if PopupMenu1.PopupComponent = Edit1 then
    Edit1.PasteFromClipboard
  else if PopupMenu1.PopupComponent = Edit2 then
    Edit2.PasteFromClipboard
  else
    Beep;
end;

Copy Code

{
This example demonstrates how to add and delete menu items
to a popup menu at runtime and assign an event handler to
the OnClick event.  Place a TPopupMenu and three buttons on
the form named "AddButton", "EditButton",  and
"DestroyButton" and add OnClick events to all three buttons.
Put the TPopupMenu in the PopupMenu property of the form.
Place the PopupMenuItemsClick procedure in the TForm1 type
declaration so that it can be used as the method call for
the menu item OnClick event.
}

type
  TForm1 = class(TForm)
    AddButton: TButton;
    EditButton: TButton;
    DestroyButton: TButton;
    PopupMenu1: TPopupMenu;
    procedure AddButtonClick(Sender: TObject);
    procedure EditButtonClick(Sender: TObject);
    procedure DestroyButtonClick(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
  public
    procedure PopupMenuItemsClick(Sender: TObject);

  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.AddButtonClick(Sender: TObject);
var
  index: Integer;
  NewItem: TMenuItem;
begin
  for index := 0 to 3 do
  begin
    NewItem :=
      TMenuItem.Create(PopupMenu1); // create the new item
    PopupMenu1.Items.Add(NewItem);// add it to the Popupmenu
    NewItem.Caption := 'Menu Item ' + IntToStr(index);
    NewItem.Tag := index;
    NewItem.OnClick :=
      PopupMenuItemsClick; // assign it an event handler
  end;
end;

procedure TForm1.PopupMenuItemsClick(Sender: TObject);
begin
  with Sender as TMenuItem do
  begin
    case Tag of
      0:  ShowMessage('first item clicked');
      1:  ShowMessage('second item clicked');
      2:  ShowMessage('third item clicked');
      3:  ShowMessage('fourth item clicked');
    end;
  end;
end;

{
To edit or destroy an item, grab its pointer via the Items
property.
}
procedure TForm1.EditButtonClick(Sender: TObject);
var
  ItemToEdit: TMenuItem;
begin
  ItemToEdit := PopupMenu.Items[1];
  ItemToEdit.Caption := 'Changed Caption';
end;

procedure TForm1.DestroyButtonClick(Sender: TObject);
var
  ItemToDelete: TMenuItem;
begin
  ItemToDelete := PopupMenu.Items[2];
  ItemToDelete.Free;
end;