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Article #17012: Adding accelerator characters to TTabsheets

 Question and Answer Database

FAQ2012D.txt   Adding accelerator characters to TTabsheets
Category   :VCL
Platform    :All
Product    :All 32 bit  

Question:
How can I make an accelerator character work for a Tabsheet?
I put accelerator characters in the captions for each Tabsheet of a
PageControl, but when I try to tab the pages using accelerator key,
it beeps and does nothing.

Answer:
The following example demonstrates trapping the CM_DIALOGCHAR
message to surface the accelerator messages for the tab sheets of
a PageControl.

Example:

type
  TForm1 = class(TForm)
    PageControl1: TPageControl;
    TabSheet1: TTabSheet;
    TabSheet2: TTabSheet;
    TabSheet3: TTabSheet;
  private
    { Private declarations }
     procedure CMDialogChar(var Msg:TCMDialogChar);
       message CM_DIALOGCHAR;
 public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.CMDialogChar(var Msg:TCMDialogChar);
var
  i:Integer;
begin
  with PageControl1 do begin
    if Enabled then
      for i := 0 to PageControl1.PageCount - 1 do
        if ((IsAccel(Msg.CharCode, Pages[i].Caption)) and
            (Pages[i].TabVisible)) then begin
        Msg.Result:=1;
        ActivePage := Pages[i];
        exit;
      end;
  end;
  inherited;
end;


7/16/98 4:31:28 PM
 

Last Modified: 01-SEP-99