Drop Files Components

Release:	5.0.2
Date:	14 January 2010
Delphi Compatibility: Key	D1   D2   D3   D4   D5   D6   D7  D2005 (Win32) D2006 (Win32) D2007 D2009 (Win32) D2010 (Win32)

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Change Log

• Enabled function inlining on Delphi 2005 and later.
• Switched off some compilation warnings on Delphi 7 and later.
• Simplified compiler directives.
• Updated documentation including corrections to help file.
• Included copy of MPL in release.

• Fixed bug that was occasionally freezing IDE when closing a form containing a TPJSubClassedDropFiles descendant component.

• Added new TPJCtrlDropFiles component that handles file drops for any assigned TWinControl descendant. TPJCtrlDropFiles descends from new TPJSubClassedDropFiles abstract component.
• Revised TPJFormDropFiles to descend from TPJSubClassedDropFiles.
• Exposed several new properties of TPJDropFiles: Anchors, Constraints, TabOrder, TabStop, Visible.
• Changed pass through processing to find ultimate owning form rather than simply parent form. This allows pass through processing to work with frames.
• Hidden controls are now ignored when searching for DropControl.
• Fixed bug in TPJWildCardFileFilter that didn't respond to change in wildcard when files dragged from same folder.
• Updated help file and a-link keyword file re new component and fixed some errors in help file.
• Completely rewrote demo program that exercises all components and added second demo program to show how to use TPJCtrlDropFiles with frames.

• Fixed bugs preventing component compilation with Delphi 3, 2005 and 2006.
• Fixed bug preventing demo program compilation with Delphi 3.
• Added new a-link keyword file for use with Delphi 6/7 OpenHelp.

• Refactored the component editor, TPJDropFilesCE. Now has a much simpler implementation.

• Added new property editor for the TPJExtFileFilter.Extensions property that displays a dialog that assists in building the extension string.
• Added new component editor for TPJFormDropFiles and TPJDropFiles that creates an OnDropFiles event handler in the designer when the components are double clicked rather than the previous default OnBeforeDrop event handler.
• Switched off the DelphiDabbler extended string property editor (if present) for TPJWildCardFileFilter's Wildcard property.
• Added new design unit - PJDropFilesDsgn - to store property editor, component editor and component registration.
• Removed component registration code from PJDropFiles unit to PJDropFilesDsgn unit.
• Updated help file re new property editor.

• Added ability to filter files dropped on the controls, either via the new OnFileFilter event or by using a linked file filter component.
• Added abstract base class for new file filter components.
• Added filter component that filters on file extensions.
• Added filter component that filters file names on wildcards.
• Fixed a memory leak in TPJAbstractDropFilesHelper.Destroy.
• Created component glyphs for new filter components.
• Updated help file.
• Updated demo program re new features.

• Fixed bug in code that determines control under drop point - the parent of the actual control under the cursor was often being returned.
• Corrected errors and typos in help file.
• Changed to Mozilla public license.
• Added demo program.

• Prevented compiler warnings when compiling the component under Delphi 6 and 7.
• Updated copyright information in help file.

• Major update (backwards compatible with v2)
• Added new Options property to determine how dropped files are handled. Options are:
  • to include or exclude folders from list
  • to include or exclude ordinary files from list
  • to add files and/or folders contained in dropped folders and their subfolders.
• Added new OnBeforeDrop event that is triggered before dropped files are processed.
• Added new IsFolder array property that informs if a dropped file is a file or folder.
• Fixed a bug in TPJFormDropFiles that was causing programs to halt on exceptions raised inside OnDropFiles event handlers.
• Changed component palette name from "PJ Stuff" to "DelphiDabbler".

• Fixed minor bug where strings holding names of dropped files had incorrect length set.

• Completely rewrote TPJDropFiles component and added FileName, PassThrough and ForegroundOnDrop properties.
• Added new TPJFormDropFiles component.
• Changed OnDropFiles event type so it no longer provides drop coordinates: we now use DropPoint property instead.
• Rewrote help file for OpenHelp compatibility.
• Broke backwards compatibility with Delph 1.
• Changed unit name from DrpFiles to PJDropFiles.

• Updated HTML documentation to include installation notes for Delphi 3/4 and update history.

• Changed component palette from "Own" to "PJ Stuff".
• Added HTML documentation.

• Changed 2nd parameter to DragQueryFile API call, when used to find number of files dropped, from $FFFF to Cardinal(-1) to make it portable across 16 and 32 bit platforms. This was needed to allow the component to compile under Delphi 2.

• Original version - 16 bit only.