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unit UEventManager;
interface
uses System.SysUtils, System.Classes, System.StrUtils, System.Generics.Collections,
System.Rtti,
FMX.Controls, FMX.StdCtrls, FMX.Listbox, FMX.Edit,
EditNumerique;
type
TEventManager = class(TObject)
private
Events: TDictionary<TControl, TNotifyEvent>;
protected
public
constructor Create;
destructor Destroy; override;
procedure EnableEvent(Ct: TControl);
procedure DisableEvent(Ct: TControl);
function IsEnabled(Ct: TControl): Boolean;
function IsDisabled(Ct: TControl): Boolean;
end;
var
EvtMgr: TEventManager;
implementation
{ TEventManager }
constructor TEventManager.Create;
begin
inherited Create;
Events := TDictionary<TControl, TNotifyEvent>.Create;
end;
destructor TEventManager.Destroy;
begin
Events.Clear;
FreeAndNil(Events);
inherited;
end;
const
Props: array[0..1] of string = ('OnChange', 'OnClick');
procedure TEventManager.DisableEvent(Ct: TControl);
var
P: TPair<TControl, TNotifyEvent>;
begin
// On ne peut pas désactiver un évènement déjà désactivé
if Events.ContainsKey(Ct) then
Exit;
if Ct is TCheckBox then
begin
Events.Add(Ct, TCheckBox(Ct).OnClick);
TCheckBox(Ct).OnClick := nil;
end
else if Ct is TComboBox then
begin
Events.Add(Ct, TComboBox(Ct).OnChange);
TComboBox(Ct).OnChange := nil;
end
else if Ct is TEdit then
begin
Events.Add(Ct, TEdit(Ct).OnChange);
TEdit(Ct).OnChange := nil;
end
else if Ct is TEditNumeric then
begin
Events.Add(Ct, TEditNumeric(Ct).OnChange);
TEditNumeric(Ct).OnChange := nil;
end;
end;
procedure TEventManager.EnableEvent(Ct: TControl);
var
P: TPair<TControl, TNotifyEvent>;
Prt: TRttiProperty;
S: string;
begin
if Events.ContainsKey(Ct) then
begin
P := Events.ExtractPair(Ct);
if Ct is TCheckBox then
TCheckBox(Ct).OnClick := P.Value
else if Ct is TComboBox then
TComboBox(Ct).OnChange := P.Value
else if Ct is TRadioButton then
TRadioButton(Ct).OnChange := P.Value
else if Ct is TEdit then
TEdit(Ct).OnChange := P.Value
else if Ct is TEditNumeric then
TEditNumeric(Ct).OnChange := P.Value;
end;
end;
function TEventManager.IsDisabled(Ct: TControl): Boolean;
begin
Result := Events.ContainsKey(Ct);
end;
function TEventManager.IsEnabled(Ct: TControl): Boolean;
begin
Result := not Events.ContainsKey(Ct);
end;
initialization
EvtMgr := TEventManager.Create;
finalization
FreeAndNil(EvtMgr);
end. |
Partager