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unit dbappform;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, DB, AppForm;
Type
TDatasetActionEvent = Procedure(Dataset : TDataset; DoAction : Boolean) of Object;
{ TDBAppForm }
TDBAppForm = Class(TAppForm)
private
FAfterOpen: TNotifyEvent;
FBeforeOpen: TNotifyEvent;
FOnOpenDataset: TDatasetActionEvent;
FOpenDatasets: Boolean;
Procedure OpenAllDatasets;
Protected
Procedure DoInitForm; override;
Procedure DoOpenDatasets; virtual;
Published
Property OpenDatasets : Boolean Read FOpenDatasets Write FOpenDatasets;
Property BeforeOpenDatasets : TNotifyEvent Read FBeforeOpen Write FBeforeOpen;
Property AfterOpenDatasets : TNotifyEvent Read FAfterOpen Write FAfterOpen;
Property OnOpenDataset : TDatasetActionEvent Read FOnOpenDataset Write FOnOpenDataset;
end;
implementation
{ TDBAppForm }
procedure TDBAppForm.OpenAllDatasets;
begin
If Assigned(BeforeOpenDatasets) then
BeforeOpenDatasets(Self);
DoOpenDatasets;
If Assigned(AfterOpenDatasets) then
AfterOpenDatasets(Self);
end;
procedure TDBAppForm.DoInitForm;
begin
inherited DoInitForm;
If OpenDatasets then
OpenAllDatasets;
end;
procedure TDBAppForm.DoOpenDatasets;
Var
I : Integer;
D : TDataset;
B : Boolean;
begin
For I:=0 to ComponentCount-1 do
begin
If Components[i] is TDataset then
begin
D:=TDataset(Components[i]);
B:=True;
If Assigned(OnOpenDataset) then
OnOpenDataset(D,B);
If B then
D.Open;
end;
end;
end;
end.
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