ReportBuilder cancel event

rbuser

Hello.
Is there some kind of cancel event for the TppReport class?
I want to disable a button when the process of building a report was
canceled.

Thanks in advance.
Dennis

rbuser

I found the best way to have full control over what's going on in the
Print Preview form is to register a custom TppPreview for it:

type
TnxPreviewPlugin = class(TppPreview)

protected
procedure PrintStateChangeEvent(Sender: TObject); override;
public
constructor Create(aOwner: TComponent); override;
procedure EventNotify(aCommunicator: TppCommunicator; aEventID:
Integer; aParams: TraParamList); override;
end;


implementation


constructor TnxPreviewPlugin.Create(aOwner: TComponent);
begin
inherited;
end;

{ TnxPreview }

procedure TnxPreviewPlugin.EventNotify(aCommunicator: TppCommunicator;
aEventID: Integer; aParams: TraParamList);
var
lnxReportingButtons: InxReportingButtons;
begin

if
TRBPrintPreview(Parent.owner).ButtonsForm.GetInterface(InxReportingButtons,
lnxReportingButtons) then
lnxReportingButtons.ButtonsDisabled := (Viewer.Busy) {or
(Viewer.Report.Printing)};

inherited EventNotify(aCommunicator, aEventID, aParams);

end;

procedure TnxPreviewPlugin.PrintStateChangeEvent(Sender: TObject);
begin
inherited;

if not viewer.Busy then
CancelButton.visible := False;

end;

initialization
TppPreviewPlugIn.Register(TnxPreviewPlugin);

finalization
TppPreviewPlugIn.UnRegister(TnxPreviewPlugin);

end.

nicocizik

Hi Dennis,

Take a look at the TppReport.OnCancel event.

This event fires when a user cancels the generation of a report.

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