TdxCustomLayoutItem.OnShowHyperlinkHint Event

Allows you to change a hyperlink hint before it appears.

Declaration

delphi

property OnShowHyperlinkHint: TdxShowHyperlinkHintEvent read; write;

Remarks

A hyperlink defined in the layout item’s caption can display the target URI in a hint when a user hovers the mouse pointer over the hyperlink. You can handle the OnShowHyperlinkHint event to change the hyperlink hint message for any hyperlink in the layout item.

Event Occurrence

The OnShowHyperlinkHint event occurs every time a hyperlink hint is about to appear.

Event Parameters

The following parameters are accessible within an OnShowHyperlinkHint event handler:

SenderProvides access to the layout item that raised the hyperlink hint display event.AArgsProvides access to information related to the hyperlink hint display event that occurred. You can use the AArgs.Hint property to change hint text.

Refer to TdxShowHyperlinkHintEvent and TdxShowHyperlinkHintEventArgs type descriptions for detailed information on all options available within an OnShowHyperlinkHint event handler.

Code Example: Prevent Accidental Hyperlink Activation in Layout Items

The code example in this section demonstrates OnHyperlinkClick and OnShowHyperlinkHint event handlers. The OnHyperlinkClick handler requires a user to hold down the Ctrl key to activate a hyperlink. The OnShowHyperlinkHint event handler changes all hyperlink hints to prompt a user to hold the Ctrl key for hyperlink activation.

Delphi
C++

delphi

procedure TMyForm.dxLayoutControlItem1HyperlinkClick(Sender: TObject;
  AArgs: TdxHyperlinkClickEventArgs);
begin
  if AArgs.Shift <> [ssCtrl] then // If the Ctrl key is not held down
    AArgs.Handled := True; // Prevents hyperlink activation
end;

procedure TMyForm.dxLayoutControl1Item1ShowHyperlinkHint(Sender: TObject;
  AArgs: TdxShowHyperlinkHintEventArgs);
var
  AHintPrefix, AHintURI: string;
begin
  AHintPrefix := 'Ctrl-click to navigate to ';
  AHintURI := AArgs.URI.Remove(0, 8); // Removes the URI scheme from the hyperlink hint
  AArgs.Hint := AHintPrefix + AHintURI; // Redefines the hyperlink hint
end;

cpp

void __fastcall TMyForm::dxLayoutControl1Item1HyperlinkClick(TObject *Sender,
  TdxHyperlinkClickEventArgs *AArgs)
{
  if(AArgs->Shift != (TShiftState() << [ssCtrl])) // If the Ctrl key is held down
    AArgs->Handled = true; // Prevents hyperlink activation
}

void __fastcall TMyForm::dxLayoutControl1Item1ShowHyperlinkHint(TObject *Sender,
  TdxShowHyperlinkHintEventArgs *AArgs)
{
  UnicodeString AHintPrefix, AHintURI;
  AHintPrefix = "Ctrl-click to navigate to ";
  AHintURI = AArgs->URI.Remove(0, 8); // Removes the URI scheme from the hyperlink hint
  AArgs->Hint = AHintPrefix + AHintURI; // Redefines the hyperlink hint
}