Nao sei se estou errado..
constructor TColors.Create;
begin
inherited; //Faltou esta linha
FFocusColor := $00FFEFDF;
FRightColor := $00DFFFEF;
FWrongColor := $00EFDFFF;
end;
Wesley
From: Willian Jhonnes Lara dos Santos
Sent: Monday, October 13, 2008 2:07 PM
To: delphi-br@yahoogrupos.com.br
Subject: [delphi-br] Erro ao instanciar classe em componente
Olá, boa tarde a todos...
Criei alguns componentes para suprir algumas necessidades de
desenvolvimento na empresa para a qual trabalho, os quais têm a
característica de colorizar o componente (TEdit, TMaskEdit, TComboBox,
etc.) conforme foco e preenchimento. Para agrupar as propriedades das
cores em um lugar único, criei uma classe para elas [1]. Em um
componente descendente do TMaskEdit, a classe é instanciada sem problema
[2], mas em um componente descendente do TEdit, ela não é instanciada,
mesmo com a indicação em seu construtor [3].
Alguém tem alguma idéia de qual seja o problema?
[]'s
[1] - { TColors }
TColors = class(TGraphicsObject)
private
{ Private declarations }
FFocusColor,
FRightColor,
FWrongColor: TColor;
FNotify: IChangeNotifier;
protected
{ Protected declarations }
procedure Changed; override;
procedure SetFocusColor(Value: TColor);
procedure SetRightColor(Value: TColor);
procedure SetWrongColor(Value: TColor);
public
{ Public declarations }
constructor Create;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
published
{ Published declarations }
property FocusColor: TColor read FFocusColor write SetFocusColor;
property RightColor: TColor read FRightColor write SetRightColor;
property WrongColor: TColor read FWrongColor write SetWrongColor;
end;
{ TColors }
procedure TColors.Assign(Source: TPersistent);
begin
if Source is TColors then
begin
Lock;
try
TColors(Source).Lock;
try
FFocusColor := TColors(Source).FocusColor;
FRightColor := TColors(Source).RightColor;
FWrongColor := TColors(Source).WrongColor;
finally
TColors(Source).Unlock;
end;
finally
Unlock;
end;
Exit;
end;
inherited Assign(Source);
end;
procedure TColors.Changed;
begin
inherited Changed;
if FNotify <> nil then
FNotify.Changed;
end;
constructor TColors.Create;
begin
FFocusColor := $00FFEFDF;
FRightColor := $00DFFFEF;
FWrongColor := $00EFDFFF;
end;
destructor TColors.Destroy;
begin
FreeInstance;
end;
procedure TColors.SetFocusColor(Value: TColor);
begin
if FFocusColor <> Value then
begin
FFocusColor := Value;
Changed;
end;
end;
procedure TColors.SetRightColor(Value: TColor);
begin
if FRightColor <> Value then
begin
FRightColor := Value;
Changed;
end;
end;
procedure TColors.SetWrongColor(Value: TColor);
begin
if FWrongColor <> Value then
begin
FWrongColor := Value;
Changed;
end;
end;
-----------------------------------------------------
[2] - { TTutorialMaskEdit }
TTutorialMaskEdit = class(TMaskEdit)
private
{ Private declarations }
FMandatory,
FRequired,
FColorize,
FValidate,
FSaveLiterals,
FShowMessages: Boolean;
FColors: TColors;
FMaskType: TMaskType;
FAlternate: TAlternableMask;
FCharForBlanks: Char;
FOriginalColor: TColor;
FControlMask: Byte;
FMsgs: TMaskEditMessages;
FAlternableShortCut: TShortCut;
FMsgType: TMessageType;
procedure SetMask(Mask: TMaskType);
procedure SetColors(Value: TColors);
procedure SetColorize(Value: Boolean);
procedure SetRequired(Value: Boolean);
procedure SetValidate(Value: Boolean);
procedure SetMessages(Value: TMaskEditMessages);
protected
{ Protected declarations }
procedure DoEnter; override;
procedure DoExit; override;
procedure KeyUp(var Key: Word; Shift: TShiftState); override;
public
{ Public declarations }
published
{ Published declarations }
constructor Create(AOwner: TComponent); override;
property Mandatory: Boolean read FMandatory write FMandatory
default False;
property Colorize: Boolean read FColorize write SetColorize
default True;
property Required: Boolean read FRequired write SetRequired
default True;
property Validate: Boolean read FValidate write SetValidate
default True;
property SaveLiterals: Boolean read FSaveLiterals write
FSaveLiterals default False;
property MaskType: TMaskType read FMaskType write SetMask;
property Colors: TColors read FColors write SetColors;
property AlternableMasks: TAlternableMask read FAlternate write
FAlternate;
property CharForBlanks: Char read FCharForBlanks write FCharForBlanks;
property AlternableShortCut: TShortCut read FAlternableShortCut
write FAlternableShortCut;
property ShowMessages: Boolean read FShowMessages write FShowMessages;
property Messages: TMaskEditMessages read FMsgs write SetMessages;
property MessageType: TMessageType read FMsgType write FMsgType;
end;
.
.
.
constructor TTutorialMaskEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
SetMask(mtCustom);
FMandatory := False;
FRequired := True;
FColorize := True;
FColors := TColors.Create;
FMsgs := TMaskEditMessages.Create;
FCharForBlanks := #32;
FSaveLiterals := False;
FControlMask := 0;
end;
-----------------------------------------------------
[3] - { TTutorialDateEdit }
TTutorialDateEdit = class(TEdit)
private
{ Private declarations }
FMinDate,
FMaxDate: TDate;
FMandatoryState,
FMandatory,
FShowMessages,
FColorize,
FRequired : Boolean;
FMask: String;
FMsgs: TDateEditMessages;
FMsgType: TMessageType;
FColors: TColors;
function GetDate: TDate;
procedure SetDate(D: TDate);
procedure SetMessages(Value: TDateEditMessages);
procedure SetColors(Value: TColors);
procedure SetColorize(Value: Boolean);
procedure SetRequired(Value: Boolean);
protected
{ Protected declarations }
procedure KeyPress(var Key: Char); override;
procedure KeyUp(var Key: Word; Shift: TShiftState); override;
procedure DoEnter; override;
procedure DoExit; override;
procedure Change; override;
public
{ Public declarations }
published
{ Published declarations }
constructor Create(AOwner: TComponent);
property DateValue: TDate read GetDate write SetDate;
property MinDate: TDate read FMinDate write FMinDate;
property MaxDate: TDate read FMaxDate write FMaxDate;
property Mandatory: Boolean read FMandatory write FMandatory;
property ShowMessages: Boolean read FShowMessages write FShowMessages;
property Colorize: Boolean read FColorize write SetColorize;
property Required: Boolean read FRequired write SetRequired;
property Mask: String read FMask;
property Messages: TDateEditMessages read FMsgs write SetMessages;
property MessageType: TMessageType read FMsgType write FMsgType;
property Colors: TColors read FColors write SetColors;
end;
.
.
.
constructor TTutorialDateEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FRequired := True;
FColorize := True;
FColors := TColors.Create;
FMsgs := TDateEditMessages.Create;
FMask := 'DD/MM/YYYY';
SetDate(Date);
FMsgType := mtAlert;
end;
---------------------------------------------------
Att.:
Willian Jhonnes L. dos Santos
Analista/Desenvolvedor Object/Free Pascal
[EMAIL PROTECTED]
---------------------------------------------------
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