| Class TSelfRefreshQuery (unit RefreshQ) |
TQuery
Version 2.33 Aug-23-1997 (C) 1997 Christoph R. Kirchner TSelfRefreshQuery is a TQuery-descendant that uses BDE-Callbacks to refresh itself if the dataset got modified by another program or by another TDataset-component in the same application. Delphi 1: Queries on Paradox tables only. Delphi >= 2.0: Queries on Paradox and dBase tables, queries on Interbase tables get the refresh-event only inside the application, others not tested yet. Please Note that querys cannot get refreshed if RequestLive is false. The author assumes no liability for damages and disclaims all warranties. See disclaimer in Readme.txt. Please forward any comments or suggestions to Christoph Kirchner at: ckirchner@geocities.com
| Constructors |
constructor Create(AOwner: TComponent);| Functions |
destructor Destroy;
procedure DoRefresh(Dataset: TDataset; var Done: Boolean);
procedure CloseCursor;
procedure DisableRefresh;
procedure DoAfterOpen;
procedure DoAfterRefresh;
procedure DoBeforeRefresh;
procedure EnableRefresh;
function RefreshCallBack(CBInfo: Pointer): CBRType;
procedure SetSelfRefreshEnabled(Value: Boolean);| Properties |
property AfterRefresh : TDataSetNotifyEvent
property BeforeRefresh : TDataSetNotifyEvent
property SelfRefreshEnabled : Boolean| Events |
| Variables |
FAfterRefresh : TDataSetNotifyEvent;
FBeforeRefresh : TDataSetNotifyEvent;
FCSDesigningAndOwnerIsDataModule : Boolean;
FSelfRefreshEnabled : Boolean;| Constructors |
constructor Create(AOwner: TComponent);TSelfRefreshQuery ---------------------------------------------------------
| Functions |
destructor Destroy;Delphi 2.0 bug workaround:
procedure DoRefresh(Dataset: TDataset; var Done: Boolean);
procedure CloseCursor;
procedure DisableRefresh;and RequestLive
procedure DoAfterOpen;
procedure DoAfterRefresh;
procedure DoBeforeRefresh;
procedure EnableRefresh;
function RefreshCallBack(CBInfo: Pointer): CBRType;Delphi 2.0 bug workaround:
procedure SetSelfRefreshEnabled(Value: Boolean);| Properties |
property AfterRefresh : TDataSetNotifyEvent
property BeforeRefresh : TDataSetNotifyEvent
property SelfRefreshEnabled : Boolean| Events |
| Variables |
FAfterRefresh : TDataSetNotifyEvent;
FBeforeRefresh : TDataSetNotifyEvent;
FCSDesigningAndOwnerIsDataModule : Boolean;Delphi 2.0 bug workaround: If Delphi 2 is closing, the ComponentState-flag csDesigning gets removed from the Datasets before they get destroyed - but only if the Owner is a TDataModule. We don't want to call DisableRefresh in this case:
FSelfRefreshEnabled : Boolean;