macOS Form Position Save and Restore
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This article applies to macOS only.
See also: Multiplatform Programming Guide
Overview
Here is a quick, almost code-free method to save the form's position and size using the Mac preferences system.
The setFrameAutosaveName method sets the preferences key name used and loads any previously-saved state. As a result, it is best to call it in an OnShow handler. There is no need to do anything else and the state of the form's position and size will be saved automatically when the form closes.
A short example may be found below. Note that you need to give the form a unique name - here I have used Form_123
Code example
unit Unit1;
{$mode objfpc}{$H+}
{$modeswitch objectivec1}
interface
uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs,
CocoaAll;
type
{ TForm_123 }
TForm_123 = class(TForm)
procedure FormShow(Sender: TObject);
private
public
end;
var
Form_123: TForm_123;
implementation
{$R *.lfm}
{ TForm_123 }
procedure TForm_123.FormShow(Sender: TObject);
begin
NSView(Form_123.Handle).window.setFrameAutosaveName(NSSTR(ClassName));
end;
end.
