creating Components

[picyka]

How do I override methods

 

type

TUniEditText = class(TUniEdit)

private

{ Private declarations }

protected

{ Protected declarations }

procedure DoEnter; override;

procedure DoExit; override;

public

[Farshad Mohajeri]

You already answered your question.

[picyka]

yes, but my schedule did not work on the web, what do this wrong, is attached.

 

 

unit UniEditText;

interface

uses
 System.SysUtils,
 System.Classes,
 Vcl.Controls,
 uniGUIBaseClasses,
 uniGUIClasses,
 uniEdit,
 uniLabel,
 Vcl.Graphics,
 Data.Bind.Components,
 Dialogs;

type
 TUniEditText = class(TUniEdit)
 private
   FNewValue: String;
   FOldValue: String;
   FBindObject: TBindingsList;
   procedure SetBindObject(const Value: TBindingsList);
   { Private declarations }
 protected
   { Protected declarations }
   procedure DoEnter; override;
   procedure DoExit; override;
 public
   { Public declarations }
   constructor Create(AOwner: TComponent); override;
   destructor Destroy; override;
 published
   { Published declarations }
   property OldValue : String read FOldValue write FOldValue;
   property NewValue : String read FNewValue write FNewValue;
   property BindObject : TBindingsList read FBindObject write SetBindObject;
 end;

procedure Register;

implementation

procedure Register;
begin
 RegisterComponents('LS Unigui Componentes', [TUniEditText]);
end;

{ TUniEditText }

constructor TUniEditText.Create(AOwner: TComponent);
begin
 inherited Create(AOwner);
end;

destructor TUniEditText.Destroy;
begin
 inherited Destroy;
end;

procedure TUniEditText.DoEnter;
begin
 Self.FOldValue := Self.Text;
 Self.Color := $00C4FFFF;
 inherited DoEnter;
end;

procedure TUniEditText.DoExit;
begin
 if Trim(Self.FNewValue) <> Trim(Self.Text) then
 begin
   if Self.FBindObject <> nil then
     Self.FBindObject.Notify(Self,'Text');

   Self.FNewValue := Self.Text;
 end;

 Self.Color := clWindow;
 inherited DoExit;
end;

procedure TUniEditText.SetBindObject(const Value: TBindingsList);
begin
 FBindObject := Value;
end;

end. 

[Farshad Mohajeri]

In uniGUI method names are:

 

	procedure DoOnEnter; virtual;
procedure DoOnExit; virtual;

[Farshad Mohajeri]

Another thing:

 

In web mode DoOnEnter and DoOnExit aren't called unless user event handlers are assigned.

 

Solution:

 

constructor TUniEditText.Create(AOwner: TComponent);
begin
 inherited Create(AOwner);
 PersistentEvents := PersistentEvents + [evEnter, evExit];
end;

[picyka]

it worked, the veses it loses focus, I'm doing another component that could help it follows:

 

 

unit UniEditFind;

 

interface

 

uses

System.SysUtils,

System.Classes,

Vcl.Controls,

uniGUIBaseClasses,

uniGUIClasses,

uniEditText,

Winapi.Windows,

uniSpeedButton,

Vcl.Graphics,

Messages;

 

type

TUniEditFind = class(TUniEditText)

private

{ Private declarations }

FOnBtnClick : TNotifyEvent;

FButton: TUniSpeedButton;

function GetGlyph : TBitmap;

procedure SetGlyph(Pic: TBitmap);

procedure CMVisiblechanged(var Message: TMessage); message CM_VISIBLECHANGED;

procedure CMEnabledchanged(var Message: TMessage); message CM_ENABLEDCHANGED;

procedure WMSize(var Message: TWMSize); message WM_SIZE;

procedure SetEditRect;

protected

{ Protected declarations }

procedure aClick (Sender: TObject); virtual;

public

{ Public declarations }

constructor Create(AOwner: TComponent); override;

destructor Destroy; override;

 

property Button: TUniSpeedButton read FButton;

property Glyph : TBitmap read GetGlyph write SetGlyph;

property OnBtnClick : TNotifyEvent read FOnBtnClick write FOnBtnClick;

published

{ Published declarations }

end;

 

procedure Register;

 

implementation

 

procedure Register;

begin

RegisterComponents('LS Unigui Componentes', [TUniEditFind]);

end;

 

{ TUniEditFind }

 

procedure TUniEditFind.aClick(Sender: TObject);

begin

if not ReadOnly then

begin

iF Assigned(FOnBtnClick) then

begin

SetFocus;

FOnBtnClick(Self);

end;

end;

end;

 

procedure TUniEditFind.CMEnabledchanged(var Message: TMessage);

begin

if Assigned(Self.FButton) then

Self.FButton.Enabled := Enabled;

end;

 

procedure TUniEditFind.CMVisiblechanged(var Message: TMessage);

begin

if Assigned(Self.FButton) then

Self.FButton.Visible := Visible;

end;

 

constructor TUniEditFind.Create(AOwner: TComponent);

begin

inherited Create(AOwner);

FButton := TUniSpeedButton.Create(Self);

FButton.Width := 15;

FButton.Height := 17;

FButton.Parent := Self;

FButton.Cursor:=crHandPoint;

FButton.ShowHint := True;

FButton.Hint := 'Consultar <F4>';

Self.Alignment := taCenter;

end;

 

destructor TUniEditFind.Destroy;

begin

FButton := nil;

inherited;

end;

 

function TUniEditFind.GetGlyph: TBitmap;

begin

Result := FButton.Glyph;

end;

 

procedure TUniEditFind.SetEditRect;

var

Loc: TRect;

begin

SendMessage(Handle, EM_GETRECT, 0, LongInt(@Loc));

Loc.Bottom := ClientHeight + 1;

Loc.Right := ClientWidth - FButton.Width - 2;

Loc.Top := 0;

Loc.Left := 0;

SendMessage(Handle, EM_SETRECTNP, 0, LongInt(@Loc));

SendMessage(Handle, EM_GETRECT, 0, LongInt(@Loc));

end;

 

procedure TUniEditFind.SetGlyph(Pic: TBitmap);

begin

FButton.Glyph.Assign(Pic);

end;

 

 

procedure TUniEditFind.WMSize(var Message: TWMSize);

var

MinHeight: Integer;

begin

inherited;

MinHeight := 5;

 

if Height < MinHeight then

Height := MinHeight

else

if FButton <> nil then

begin

FButton.Width := Height;

if NewStyleControls and Ctl3D then

FButton.SetBounds(Width - FButton.Width - 4, 0, FButton.Width, Height - 4)

else

FButton.SetBounds (Width - FButton.Width, 1, FButton.Width, Height - 1);

SetEditRect;

end;

end;

end.

 

 

grateful