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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2007 See the file AUTHORS.txt, included in this
distribution, for details of the copyright.
See the file COPYING.modifiedLGPL, included in this distribution,
for details about redistributing fpGUI.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Description:
This descendant adds ReadOnly support and can read/write Form state
information.
}
unit gui_iniutils;
{$mode objfpc}{$H+}
interface
uses
Classes,
SysUtils,
IniFiles,
gui_form;
type
TfpgINIFile = class(TINIFile)
private
FReadOnly: Boolean;
public
constructor CreateExt(const AFileName: string = ''; AReadOnly: Boolean = False);
function ReadString(const ASection, AIdent, ADefault: string): string; override;
function ReadInteger(const ASection, AIdent: string; ADefault: longint): longint; override;
function ReadBool(const ASection, AIdent: string; ADefault: Boolean): Boolean; override;
function ReadDate(const ASection, AName: string; ADefault: TDateTime): TDateTime; override;
function ReadDateTime(const ASection, AName: string; ADefault: TDateTime): TDateTime; override;
function ReadFloat(const ASection, AName: string; ADefault: double): double; override;
function ReadTime(const ASection, AName: string; ADefault: TDateTime): TDateTime; override;
procedure ReadFormState(AForm: TfpgForm; AHeight: integer = -1; AWidth: integer = -1);
procedure WriteFormState(AForm: TfpgForm);
end;
// singleton
function gINI(const AFileName: string = ''): TfpgINIFile;
implementation
uses
fpgfx
,gfx_constants;
var
uINI: TfpgINIFile;
function gINI(const AFileName: string): TfpgINIFile;
begin
if uINI = nil then
uINI := TfpgINIFile.CreateExt(AFileName);
Result := uINI;
end;
{ TfpgINIFile }
constructor TfpgINIFile.CreateExt(const AFileName: string; AReadOnly: Boolean);
var
lDir: string;
lFileName: string;
begin
FReadOnly := AReadOnly;
lDir := ExtractFileDir(AFileName);
lFileName := ExtractFileName(AFileName);
if lDir = '' then
lDir := GetAppConfigDir(False);
lDir := lDir + PathDelim;
{ We used a non-Global config dir, so should be able to create the dir }
if not ForceDirectories(lDir) then
raise Exception.CreateFmt(rsErrFailedToCreateDir, [lDir]);
if lFileName = '' then
lFileName := ApplicationName + '.ini'
else if ExtractFileExt(lFileName) = '' then
lFileName := lFileName + '.ini';
lFileName := lDir + lFileName;
Create(lFileName);
end;
function TfpgINIFile.ReadString(const ASection, AIdent, ADefault: string): string;
begin
Result := inherited ReadString(ASection, AIdent, ADefault);
if (not ValueExists(ASection, AIdent)) and
(not FReadOnly) then
WriteString(ASection, AIdent, ADefault);
end;
function TfpgINIFile.ReadInteger(const ASection, AIdent: string; ADefault: longint): longint;
begin
if (not ValueExists(ASection, AIdent)) and
(not FReadOnly) then
WriteInteger(ASection, AIdent, ADefault);
Result := inherited ReadInteger(ASection, AIdent, ADefault);
end;
function TfpgINIFile.ReadBool(const ASection, AIdent: string; ADefault: Boolean): Boolean;
var
lValueExists: Boolean;
begin
lValueExists := ValueExists(ASection, AIdent);
if (not lValueExists) and
(not FReadOnly) then
WriteBool(ASection, AIdent, ADefault);
Result := inherited ReadBool(ASection, AIdent, ADefault);
end;
function TfpgINIFile.ReadDate(const ASection, AName: string; ADefault: TDateTime): TDateTime;
begin
if (not ValueExists(ASection, AName)) and
(not FReadOnly) then
WriteDate(ASection, AName, ADefault);
Result := inherited ReadDate(ASection, AName, ADefault);
end;
function TfpgINIFile.ReadDateTime(const ASection, AName: string; ADefault: TDateTime): TDateTime;
begin
if (not ValueExists(ASection, AName)) and
(not FReadOnly) then
WriteDateTime(ASection, AName, ADefault);
Result := inherited ReadDateTime(ASection, AName, ADefault);
end;
function TfpgINIFile.ReadFloat(const ASection, AName: string; ADefault: double): double;
begin
if (not ValueExists(ASection, AName)) and
(not FReadOnly) then
WriteFloat(ASection, AName, ADefault);
Result := inherited ReadFloat(ASection, AName, ADefault);
end;
function TfpgINIFile.ReadTime(const ASection, AName: string; ADefault: TDateTime): TDateTime;
begin
if (not ValueExists(ASection, AName)) and
(not FReadOnly) then
WriteTime(ASection, AName, ADefault);
Result := inherited ReadTime(ASection, AName, ADefault);
end;
// Do NOT localize
procedure TfpgINIFile.ReadFormState(AForm: TfpgForm; AHeight: integer; AWidth: integer);
var
LINISection: string;
LTop: integer;
LLeft: integer;
LHeight: integer;
LWidth: integer;
begin
Assert(AForm <> nil, Format(rsErrNotAssigned, ['pForm']));
LINISection := AForm.Name + 'State';
// Read form position, -1 if not stored in registry
LTop := readInteger(LINISection, 'Top', -1);
LLeft := readInteger(LINISection, 'Left', -1);
// The form pos was found in the registr
if (LTop <> -1) and (LLeft <> -1) then
begin
AForm.Top := readInteger(LINISection, 'Top', AForm.Top);
AForm.Left := readInteger(LINISection, 'Left', AForm.Left);
AForm.WindowPosition := wpUser;
// No form pos in the registry, so default to screen center
end
else if Assigned(fpgApplication.MainForm) and (fpgApplication.MainForm <> AForm) then
AForm.WindowPosition := wpAuto
else
AForm.WindowPosition := wpScreenCenter;
// Only set the form size if a bsSizable window
if AForm.Sizeable then
begin
if AHeight = -1 then
LHeight := AForm.Height
else
LHeight := AHeight;
if AWidth = -1 then
LWidth := AForm.Width
else
LWidth := AWidth;
AForm.Height := readInteger(LINISection, 'Height', LHeight);
AForm.Width := readInteger(LINISection, 'Width', LWidth);
end;
// AForm.WindowState := TWindowState(ReadInteger(LINISection, 'WindowState', ord(wsNormal)));
// If the form is off screen (positioned outside all monitor screens) then
// center the form on screen.
//{$IFDEF MSWINDOWS}
//if (AForm.FormStyle <> fsMDIChild) {$IFNDEF FPC} and tiFormOffScreen(AForm) {$ENDIF} then
//begin
//if Assigned(Application.MainForm) and (Application.MainForm <> AForm) then
//AForm.Position := poMainFormCenter
//else
//AForm.Position:= poScreenCenter;
//end;
//{$ENDIF MSWINDOWS}
end;
// Do NOT localize
procedure TfpgINIFile.WriteFormState(AForm: TfpgForm);
var
LINISection: string;
begin
LINISection := AForm.Name + 'State';
// writeInteger(LINISection, 'WindowState', ord(AForm.WindowState));
// if AForm.WindowState = wsNormal then
// begin
// A work-around while WindowState is not implemented
if (AForm.Top >= 0) or (AForm.Left >= 0) then
begin
writeInteger(LINISection, 'Top', AForm.Top);
writeInteger(LINISection, 'Left', AForm.Left);
end;
if AForm.Sizeable then
begin
writeInteger(LINISection, 'Height', AForm.Height);
WriteInteger(LINISection, 'Width', AForm.Width);
end;
// end;
end;
initialization
uINI := nil;
finalization
uINI.Free;
end.
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