delphimvcframework/LoggerPro.VCLListBoxAppender.pas
Daniele Teti b22a41ca91 Squashed 'lib/loggerpro/' changes from 7f850ebc..0b6857bd
0b6857bd Updated unit tests and automatic tasks
35d130d6 VERSION_1_4_4
2e4a80f4 Removed PasDoc documentation; Added unit tests for LogLayoutToLogFormat
8f61bc22 Removed TLogAppenderOptions, DEFAULT_LOG_FILENAME_FORMAT is now TLogLayout.* (there many possibilities); FileName layout use placeholders instead of indices (as format function does).
be43f781 Merge branch 'master' into v2.0

git-subtree-dir: lib/loggerpro
git-subtree-split: 0b6857bd8d51f5acb246561564b3c3bbd963d192
2024-01-02 16:30:52 +01:00

104 lines
2.4 KiB
ObjectPascal

// *************************************************************************** }
//
// LoggerPro
//
// Copyright (c) 2010-2023 Daniele Teti
//
// https://github.com/danieleteti/loggerpro
//
// Contributors for this file:
// David Cornelius
//
// ***************************************************************************
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// ***************************************************************************
unit LoggerPro.VCLListBoxAppender;
interface
uses
LoggerPro,
System.Classes,
Vcl.StdCtrls;
type
{ @abstract(Appends formatted @link(TLogItem) to a TListBox in a VCL application) }
TVCLListBoxAppender = class(TLoggerProAppenderBase)
private
FLB: TListBox;
FMaxLogLines: Word;
public
constructor Create(aLB: TListBox; aMaxLogLines: Word = 500; aLogFormat: string = DEFAULT_LOG_FORMAT); reintroduce;
procedure Setup; override;
procedure TearDown; override;
procedure WriteLog(const aLogItem: TLogItem); override;
end;
implementation
uses
System.SysUtils;
{ TVCLListBoxAppender }
constructor TVCLListBoxAppender.Create(aLB: TListBox; aMaxLogLines: Word; aLogFormat: string);
begin
inherited Create(aLogFormat);
FLB := aLB;
FMaxLogLines := aMaxLogLines;
end;
procedure TVCLListBoxAppender.Setup;
begin
inherited;
TThread.Synchronize(nil,
procedure
begin
FLB.Clear;
end);
end;
procedure TVCLListBoxAppender.TearDown;
begin
// do nothing
end;
procedure TVCLListBoxAppender.WriteLog(const aLogItem: TLogItem);
var
lText: string;
begin
lText := FormatLog(aLogItem);
TThread.Queue(nil,
procedure
var
Lines: integer;
begin
FLB.Items.BeginUpdate;
try
Lines := FLB.Items.Count;
if Lines > FMaxLogLines then
FLB.Items.Delete(0);
FLB.AddItem(lText, nil);
FLB.ItemIndex := FLB.Items.Count - 1;
finally
FLB.Items.EndUpdate;
end;
end);
end;
end.