Files
lazarus-ccr/components/jvcllaz/run/JvAppFrm/jvformanimatedicon.pas
2019-05-26 22:58:36 +00:00

133 lines
3.5 KiB
ObjectPascal

{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.
The Original Code is: JvFormAnimatedIcon.PAS, released on 2001-02-28.
The Initial Developer of the Original Code is Sébastien Buysse [sbuysse att buypin dott com]
Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
All Rights Reserved.
Contributor(s): Michael Beck [mbeck att bigfoot dott com].
You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.delphi-jedi.org
Known Issues:
-----------------------------------------------------------------------------}
// $Id$
unit JvFormAnimatedIcon;
{$mode objfpc}{$H+}
interface
uses
SysUtils, Classes, Controls, Forms, ExtCtrls,
ImgList, Graphics;
type
TJvFormAnimatedIcon = class(TComponent) //JvComponent)
private
FForm: TCustomForm;
FActive: Boolean;
FDelay: Cardinal;
FIcons: TImageList;
FTimer: TTimer;
FNumber: Integer;
procedure SetActive(const Value: Boolean);
procedure SetDelay(const Value: Cardinal);
procedure Animate(Sender: TObject);
procedure SetIcons(const Value: TImageList);
protected
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
property Icons: TImageList read FIcons write SetIcons;
property Active: Boolean read FActive write SetActive default True;
property Delay: Cardinal read FDelay write SetDelay default 100;
end;
implementation
uses
JvJVCLUtils;
constructor TJvFormAnimatedIcon.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FForm := GetParentForm(TControl(AOwner));
FActive := True;
FNumber := 0;
FDelay := 100;
FTimer := nil;
if not (csDesigning in ComponentState) then
begin
FTimer := TTimer.Create(Self);
FTimer.OnTimer := @Animate;
FTimer.Interval := FDelay;
FTimer.Enabled := FActive;
end;
end;
destructor TJvFormAnimatedIcon.Destroy;
begin
FTimer.Free;
inherited Destroy;
end;
procedure TJvFormAnimatedIcon.Notification(AComponent: TComponent;
Operation: TOperation);
begin
inherited Notification(AComponent, Operation);
if Operation = opRemove then
begin
if AComponent = FIcons then
SetIcons(nil);
end;
end;
procedure TJvFormAnimatedIcon.Animate(Sender: TObject);
begin
if (FIcons <> nil) and (FIcons.Count <> 0) then
begin
FNumber := (FNumber + 1) mod FIcons.Count;
FIcons.GetIcon(FNumber, TForm(FForm).Icon);
end;
end;
procedure TJvFormAnimatedIcon.SetActive(const Value: Boolean);
begin
FActive := Value;
if not (csDesigning in ComponentState) then
FTimer.Enabled := FActive;
end;
procedure TJvFormAnimatedIcon.SetDelay(const Value: Cardinal);
begin
FDelay := Value;
if not (csDesigning in ComponentState) then
FTimer.Interval := FDelay;
end;
procedure TJvFormAnimatedIcon.SetIcons(const Value: TImageList);
begin
ReplaceComponentReference(Self, Value, TComponent(FIcons));
end;
end.