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Window State Components

Release:	5.4
Date:	19 June 2011
Delphi Compatibility: Key	D1   D2   D3   D4   D5   D6   D7  D2005 D2006 D2007 D2009 D2010  DXE  DXE2

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• Install Info
• Change Log
• License

Change Log

• Added new OnAfterWindowRestored and OnAfterWindowSized events to all components.
• Added new topics to help file and updated copyright date.
• Corrected header comments in various demo project files.

• Made PJWdwState unit compatible with Delphi 4.
• Made minor changes to demos:
  • Improved layout of controls in demo #2.
  • Removed form properties that are not supported on earlier versions of Delphi and changed form format from text to binary where necessary.
• Rebuilt help file.
• Removed HKEY property editor from release.
• Revised documentation and included shortcut file that links to component Wiki.

• Completely re-implemented code that supports fitting MDI child form in parent client workspace. Original code was broken.
• Bug fix in multi-monitor code by Craig Symons.
• Pause before minimization of form now uses a busy wait rather than call to Sleep.

• Added support for multiple monitors based on code suggested by Craig Symons.
• Deleted unused defines.

• Merged in changes provided by Bruce J Miller.
  • Added events to enable user defined data to be read from or written to registry when TPJRegWdwState writes or reads window state information.
  • Enabled components to work with MDI child forms.

• Added new TPJUserWdwState component that gets user to provide implementation of reading and writing persistent storage by handling events.
• Changed TPJCustomWdwState.OnReadWdwState to protected and exposed in TPJWdwState and TPJRegWdwState. This is not used in TPJUserWdwState.
• Updated help files re new TPJUserWdwState component.
• Added new demo illustrating use of TPJUserWdwState.

• Fixed compiler directive error causing program to fail to compile in Delphis below v7.
• Added new a-link keyword file.
• Updated HKEY property editor from v1.0.2 to v1.0.3.
• Removed from demo applications some form properties and unit clauses not available in earlier versions of Delphi.

• Added new CreateStandAlone constructor to enable window state component instances to be constructed dynamlically at run time.
• Updated help file with details of new constructor.
• Added two new demo programs.

• Added new option to Options property to ensure window is not displayed out of the desktop's work area.
• Some changes made to way registry is accessed in TPJRegWdwState.
• Rearranged some decision logic.
• Updated HKEY property editor from v1.0.1 to v1.0.2.
• Changed component palette to 'DelphiDabbler' from 'PJSoft'.

• Added new OnReadWdwState event in which user can override window placement, size and state read from registry or ini file.
• Added new Options property which contains a set of values that govern the behavoiur of the component. The options are to ignore the stored window state and ensure window is displayed normally or ignore the stored window size and use the form's size as designed.

• Made use ParamStr(0) for default name of ini file and registry key.
• Changed name of default registry sub key and ini file section to enable use of multiple forms without overwriting each other's data when using default property values.
• Rewrote method of auto saving and restoring windows to stop having to manipulate the owning form's OnCreate and OnDestroy event handlers. Now uses a hook class to hook into owning form's messages and pass them to window state components. The window now always momentarily appears in normal state before being maximized or minimized as required.
• Added new MinimizeDelay property to control how long the normal window appears before being minimized.
• Added OnGetIniData event to TPJWdwState and OnGetRegData events to TPJRegWdwState to allow user to override property values for reading / writing ini file and registry.
• Made so that now only one instance of a window state component can be placed on a form.
• Rationalised some elements of code.
• Changed component palette from 'PJ Stuff' to 'PJSoft'.
• Changed unit name to PJWdwState.
• Rewrote help file to integrate into Delphi 3+ IDE, removing support for Delphi 2 IDE..

• Added v1.0.1 of the HKEY property editor for TPJRegWdwState's RegRootKey property.

• Fixed a bug where windows that were supposed to be restored maximised were displayed using the last saved window dimensions. This bug was also causing the form to fail to load other components under certain circumstances. (Thanks to Andre Viol for reporting these bugs).

• Added AutoSaveRestore property to enable forms to be automatically saved and restored. (Thanks to Stefan Winter for suggesting this and providing prototype code).
• Modified window restoration code to avoid task bars in positions other than bottom of screen. (Again thanks to Stefan for pointing out the problem and providing prototype code to fix it).
• Prevented forms being restored as minimized from flashing on screen (by cheating!)
• Removed conditional compilation statements since this version will not compile under Delphi 1.

• Renamed ReadState and SaveState methods to ReadWdwState and SaveWdwState respectively since ReadState was masking a method inherited from TComponent.
• Updated HTML documentation to include installation notes for Delphi 3/4 and added update history.

• Re-write which added TPJRegWdwState component that stores window state information in registry.
• Extracted common functionality of TPJWdwState and TPJRegWdwState into new abstract base class TPJCustomWdwState.
• TPJWdwState presented same interface and functionality as version 1.
• TRegWdwState was not available when compiled under Delphi 1 (because it uses the registry).
• Updated HTML documentation to deal with new classes.

• Original version - included just TPJWdwState component with HTML documentation.