Description: Drag and Drop Component Suite Version 4.1 Field test 5, released 16-dec-2001 ?1997-2001 Angus Johnson & Anders Melander http://www.melander.dk/delphi/dragdrop/ ------------------------------------------- Table of Contents: ------------------------------------------- 1. Supported platforms 2. Installation 3. Getting started 4. Known problems 5. Support and feedback 6. Bug reports 7. Upgrades and bug fixes 8. Missing in this release 9. New in version 4.x 10. TODO 11. Licence, Copyright and Disclaimer 12. Release history ------------------------------------------- 1. Supported platforms: ------------------------------------------- This release supports Delphi 4-6 and C++ Builder 4-5. Earlier versions of Delphi and C++ Builder will not be supported. If you need Delphi 3 or C++ Builder 3 support you will have to revert to version 3.7 of the Drag and Drop Component Suite. The library has been tested on NT4 service pack 5 and Windows 2000. Windows 95, 98, ME and XP should be supported, but has not been tested. Linux and Kylix are not supported. There are *NO* plans to port the library to Kylix. The drag and drop protocols available on Linux are too much of a mess at this time. ------------------------------------------- 2. Installation: ------------------------------------------- 1) Before you do anything else, read the "Known problems" section of this document. 2) Install the source into a directory of your choice. The files are installed into three directories: DragDrop DragDrop\Components DragDrop\Demo 3) Install and compile the appropriate design time package. The design time packages are located in the Components directory. Each version of Delphi and C++ Builder has its own package; DragDropD6.dpk for Delphi 6, DragDropD5.dpk for Delphi 5, DragDropC5.bpk for C++ Builder 5, etc. 4) Add the Drag and Drop Component Suite components directory to your library path. 5) Load the demo project group: demo\dragdrop_delphi.bpg for Delphi 5 and 6 demo\dragdrop_bcb4.bpg for C++ Builder 4 demo\dragdrop_bcb5.bpg for C++ Builder 5 The project group contains all the demo applications. 6) If your version of Delphi does not support text format DFM files (e.g. Delphi 4 doesn't), you will have to use the convert.exe utility supplied with Delphi to convert all the demo form files to binary format. A batch file, convert_forms_to delphi_4_format.bat, is supplied in the demo directory which automates the conversion process. The C++ Builder demo forms are distributed in binary format. 7) If upgrading from a previous version of the Drag and Drop Component Suite, please read the document "upgrading_to_v4.txt" before you begin working on your existing projects. Note about "Property does not exist" errors: Since all demos were developed with the latest version of Delphi, most of the demo forms probably contains references to properties that doesn't exist in earlier versions of Delphi and C++ Builder. Because of this you will get fatal run-time errors (e.g. "Error reading blahblahblah: Property does not exist.") if you attemt to run the demos without fixing this problem. Luckily it is very easy to make the forms work again; Just open the forms in the IDE, then select "Ignore All" when the IDE complains that this or that property doesn't exist and finally save the forms. ------------------------------------------- 3. Getting started: ------------------------------------------- It is recommended that you start by running each of the demo applications and then look through the demo source. Each demo application is supplied with a readme.txt file which briefly describes what the demo does and what features it uses. The demos should be run in the order in which they are listed in the supplied project group. Even if you have used previous versions of the Drag and Drop Component Suite it would be a good idea to have a quick look at the demos. The library has been completely rewritten and a lot of new features has been added. ------------------------------------------- 4. Known problems: ------------------------------------------- * The Shell Extension components does not support C++ Builder 4. For some strange reason the components causes a link error. * There appear to be sporadic problems compiling with C++ Builder 5. Several user have reported that they occasionally get one or more of the following compiler errors: [C++ Error] DragDropFile.hpp(178): E2450 Undefined structure '_FILEDESCRIPTORW' [C++ Error] DropSource.hpp(135): E2076 Overloadable operator expected I have not been able to reproduce these errors, but I believe the following work around will fix the problem: In the project options of *all* projects which uses these components, add the following conditional define: NO_WIN32_LEAN_AND_MEAN The define *must* be made in the project options. It is not sufficient to #define it in the source. If you manage to compile with C++ Builder (any version), I would very much like to know about it. * Delphi's and C++ Builder's HWND and THandle types are not compatible. For this reason it might be nescessary to cast C++ Builder's HWND values to Delphi's THandle type when a HWND is passed to a function. E.g.: if (DragDetectPlus(THandle(MyControl->Handle), Point(X, Y))) { ... } * Virtual File Stream formats can only be pasted from the clipboard with live data (i.e. FlushClipboard/OleFlushClipboard hasn't been called on the data source). This problem affects TFileContentsStreamOnDemandClipboardFormat and the VirtualFileStream demo. This is believed to be a bug in the Windows clipboard and a work around hasn't been found yet. * Asynchronous targets appears to be broken in the current release. * When TDropFileTarget.GetDataOnEnter is set to True, the component doesn't work with WinZip. Although the file names are received correctly by TDropFileTarget, WinZip doesn't extract the files and the files thus can't be copied/moved. This is caused by a quirk in WinZip; Apparently WinZip doesn't like IDataObject.GetData to be called before IDropTarget.Drop is called. ------------------------------------------- 5. Support and feedback: ------------------------------------------- Since these components are freeware they are also unsupported. You are welcome to ask for help via email, but I cannot guarantee that I will have time to help you or even reply to your mail. If you absolytely can't live without my help, you can alway try bribing me. You can also try asking for help in the Delphi newsgroups. Since the Drag and Drop Component Suite is in widespread use, there's a good chance another user can help you. I recommend the following newsgroups for issues regarding this library (or COM based Drag/Drop in general): borland.public.delphi.winapi borland.public.delphi.thirdparty-tools borland.public.delphi.oleautomation borland.public.cppbuilder.winapi borland.public.cppbuilder.thirdparty-tools Please choose the most appropiate newsgroup for your question. Do not cross post to them all. Before posting to the newsgroups, I suggest you try to search for an answer on the Google (DejaNews) search engine: http://groups.google.com Chances are that your question has been asked and answered before. If you have suggestions for improvements please mail them to me: anders@melander.dk Please include the words "Drag Drop" in the subject of any email regarding these components. ------------------------------------------- 6. Bug reports: ------------------------------------------- Bugs can either be reported at my home page (http://www.melander.dk/) or mailed directly to me: anders@melander.dk. When reporting a bug, please provide the following information: * The exact version of the Drag and Drop Component Suite you are using. * The exact version of Delphi or C++ Builder you are using. * The name and exact version of your operating system (e.g. NT4 SP5). * The exact version of the Internet Explorer installed on your system. If you can provide me with a minimal application which reproduces the problem, I can almost guarantee that I will be able to fix the problem in very short time. Please supply only the source files (pas, dfm, dpr, dof, res, etc.) and mail them as a single zip file. If I need a compiled version I will ask for it. If you feel you need to send me a screen shot, please send it in GIF or PNG format. If you mail a bug report to me, please include the words "Drag Drop" in the subject of your email. ------------------------------------------- 7. Upgrades and bug fixes: ------------------------------------------- Upgrades can be downloaded from my home page: http://www.melander.dk/delphi/dragdrop/ Bug fixes will also be posted to the above page. If you have registered for update notification via the installation program, you will receive email notification when a new release is available. You will not be notified of bug fixes. You can use the installation program to check for and download new releases and to check for known bugs. Note: If a new release is made available and you are not notified even though you registered for notification, you probably mistyped your email address during installation; About 10% of all registrations supply an invalid email address. ------------------------------------------- 8. Missing in this release: ------------------------------------------- * On-line help has not been updated and included in the kit due to late changes in the Delphi 6 help system and lack of time. If time permits, I will update the help and include it in a future release. ------------------------------------------- 9. New in version 4.x: ------------------------------------------- * Completely redesigned and rewritten. Previous versions of the Drag and Drop Component Suite used a very monolithic design and flat class hierachy which made it a bit cumbersome to extend the existing components or implement new ones. Version 4 is a complete rewrite and redesign, but still maintains compatibility with previous versions. The new V4 design basically separates the library into three layers: 1) Clipboard format I/O. 2) Data format conversion and storage. 3) COM Drag/Drop implementation and VCL component interface. The clipboard format layer is responsible for reading and writing data in different formats to and from an IDataObject interface. For each different clipboard format version 4 implements a specialized class which knows exactly how to interpret the clipboard format. For example the CF_TEXT (plain text) clipboard format is handled by the TTextClipboardFormat class and the CF_FILE (file names) clipboard format is handled by the TFileClipboardFormat class. The data format layer is primarily used to render the different clipboard formats to and from native Delphi data types. For example the TTextDataFormat class represents all text based clipboard formats (e.g. TTextClipboardFormat) as a string while the TFileDataFormat class represents a list of file names (e.g. TFileClipboardFormat) as a string list. The conversion between different data- and clipboard formats is handled by the same Assign/AssignTo mechanism as the VCLs TPersistent employes. This makes it possible to extend existing data formats with support for new clipboard formats without modification to the existing classes. The drag/drop component layer has several tasks; It implements the actual COM drag/drop functionality (i.e. it implements the IDropSource, IDropTarget and IDataObject interfaces (along with several other related interfaces)), it surfaces the data provided by the data format layer as component properties and it handles the interaction between the whole drag/drop framework and the users code. The suite provides a multitude of different components. Most are specialized for different drag/drop tasks (e.g. the TDropFileTarget and TDropFilesSource components for drag/drop of files), but some are either more generic, handling multiple unrelated formats, or simply helper components which are used to extend the existing components or build new ones. * Support for Delphi 6. Version 4.0 was primarily developed on Delphi 6 and then ported back to previous versions of Delphi and C++ Builder. * Support for Windows 2000 inter application drag images. On Windows platforms which supports it, drag images are now displayed when dragging between applications. Currently only Windows 2000 supports this feature. On platforms which doesn't support the feature, drag images are only displayed whithin the source application. * Support for Windows 2000 asynchronous data transfers. Asynchronous data tranfers allows the drop source and targets to perform slow transfers or to transfer large amounts of data without blocking the user interface while the data is being transfered. For platforms other than Windows 2000, the new TDropSourceThread class can be used to provide similar (but more limited) asynchronous data transfer capabilities. * Support for optimized and non-optimized move. When performing drag-move operations, it is now possible to specify if the target (optimized move) or the source (non-optimized move) is responsible for deleting the source files. * Support for delete-on-paste. When data is cut to the clipboard, it is now possible to defer the deletion of the source data until the target actually pastes the data. The source is notified by an event when the target pastes the data. * Extended clipboard support. All formats and components (both source and target) now support clipboard operations (copy/cut/paste) and the VCL clipboard object. * Support for shell drop handlers. The new TDropHandler component can be used to write drop handler shell extensions. A drop handler is a shell extension which is executed when a user drags and drops one or more files on a file associated wth your application. * Support for shell drag drop handlers. The new TDragDropHandler component can be used to write drag drop handler shell extensions. A drag drop handler is a shell extension which can extend the popup menu which is displayed when a user drag and drops files with the right mouse button. * Support for shell context menu handlers. The new TDropContextMenu component can be used to write context menu handler shell extensions. A context menu handler is a shell extension which can extend the popup menu which is displayed when a user right-clicks a file in the shell. * Drop sources can receive data from drop targets. It is now possible for drop targets to write data back to the drop source. This is used to support optimized-move, delete-on-paste and inter application drag images. * Automatic re-registration of targets when the target window handle is recreated. In previous versions, target controls would loose their ability to accept drops when their window handles were recreated by the VCL (e.g. when changing the border style or docking a form). This is no longer a problem. * Support for run-time definition of custom data formats. You can now add support for new clipboard formats without custom components. * Support for design-time extension of existing source and target components. Using the new TDataFormatAdapter component it is now possible to mix and match data formats and source and target components at design time. E.g. the TDropFileTarget component can be extended with URL support. * It is now possible to completely customize the target auto-scroll feature. Auto scroling can now be completely customized via the OnDragEnter, OnDragOver, OnGetDropEffect and OnScroll events and the public NoScrollZone and published AutoScroll properties. * Multiple target controls per drop target component. In previous versions you had to use one drop target component per target control. With version 4, each drop target component can handle any number of target controls. * It is now possible to specify the target control at design time. A published Target property has been added to the drop target components. * Includes 20 components: - TDropFileSource and TDropFileTarget Used for drag and drop of files. Supports recycle bin and PIDLs. - TDropTextSource and TDropTextTarget Used for drag and drop of text. - TDropBMPSource and TDropBMPTarget Used for drag and drop of bitmaps. - TDropPIDLSource and TDropPIDLTarget Used for drag and drop of PIDLs in native format. - TDropURLSource and TDropURLTarget Used for drag and drop of internet shortcuts. - TDropDummyTarget Used to provide drag/drop cursor feedback for controls which aren't registered as drop targets. - TDropComboTarget (new) Swiss-army-knife target. Accepts text, files, bitmaps, meta files, URLs and file contents. - TDropMetaFileTarget (new) Target which can accept meta files and enhanced meta files. - TDropImageTarget (new) Target which can accept bitmaps, DIBs, meta files and enhanced meta files. - TDragDropHandler (new) Used to implement Drag Drop Handler shell extensions. - TDropHandler (new) Used to implement Shell Drop Handler shell extensions. - TDragDropContext (new) Used to implement Shell Context Menu Handler shell extensions. - TDataFormatAdapter (new) Extends the standard source and target components with support for extra data formats. An alternative to TDropComboTarget. - TDropEmptySource and TDropEmptyTarget (new) Target and source components which doesn't support any formats, but can be extended with TDataFormatAdapter components. * Supports 27 standard clipboard formats: Text formats: - CF_TEXT (plain text) - CF_UNICODETEXT (Unicode text) - CF_OEMTEXT (Text in the OEM characterset) - CF_LOCALE (Locale specification) - 'Rich Text Format' (RTF text) - 'CSV' (Tabular spreadsheet text) File formats: - CF_HDROP (list of file names) - CF_FILEGROUPDESCRIPTOR, CF_FILEGROUPDESCRIPTORW and CF_FILECONTENTS (list of files and their attributes and content). - 'Shell IDList Array' (PIDLs) - 'FileName' and 'FileNameW' (single filename, used for 16 bit compatibility). - 'FileNameMap' and 'FileNameMapW' (used to rename files, usually when dragging from the recycle bin) Image formats: - CF_BITMAP (Windows bitmap) - CF_DIB (Device Independant Bitmap) - CF_METAFILEPICT (Windows MetaFile) - CF_ENHMETAFILE (Enhanced Metafile) - CF_PALETTE (Bitmap palette) Internet formats: - 'UniformResourceLocator' and 'UniformResourceLocatorW' (Internet shortcut) - 'Netscape Bookmark' (Netscape bookmark/URL) - 'Netscape Image Format' (Netscape image/URL) - '+//ISBN 1-887687-00-9::versit::PDI//vCard' (V-Card) - 'HTML Format' (HTML text) - 'Internet Message (rfc822/rfc1522)' (E-mail message in RFC822 format) Misc. formats: - CF_PREFERREDDROPEFFECT and CF_PASTESUCCEEDED (mostly used by clipboard) - CF_PERFORMEDDROPEFFECT and CF_LOGICALPERFORMEDDROPEFFECT (mostly used for optimized-move) - 'InShellDragLoop' (used by Windows shell) - 'TargetCLSID' (Mostly used when dragging to recycle-bin) * New source events: - OnGetData: Fired when the target requests data. - OnSetData: Fired when the target writes data back to the source. - OnPaste: Fired when the target pastes data which the source has placed on the clipboard. - OnAfterDrop: Fired after the drag/drop operation has completed. * New target events: - OnScroll: Fires when the target component is about to perform auto-scroll on the target control. - OnAcceptFormat: Fires when the target component needs to determine if it will accept a given data format. Only surfaced in the TDropComboTarget component. * 8 new demo applications, 19 in total. ------------------------------------------- 10. TODO (may or may not be implemented): ------------------------------------------- * Async target demo (with and without IAsyncOperation support). * Scrap file demo. * Native Outlook message format. * Structured storage support (IStorage encapsulation). ------------------------------------------- 11. Licence, Copyright and Disclaimer: ------------------------------------------- The Drag and Drop Component Suite is Copyright ?1997-2001 Angus Johnson and Anders Melander. All rights reserved. The software is copyrighted as noted above. It may be freely copied, modified, and redistributed, provided that the copyright notice(s) is preserved on all copies. The Drag and Drop Component Suite is freeware and we would like it to remain so. This means that it may not be bundled with commercial libraries or sold as shareware. You are welcome to use it in commercial and shareware applications providing you do not charge for the functionality provided by the Drag and Drop Component Suite. There is no warranty or other guarantee of fitness for this software, it is provided solely "as is". You are welcome to use the source to make your own modified components, and such modified components may be distributed by you or others if you include credits to the original components, and do not charge anything for your modified components. ------------------------------------------- 12. Version 4 release history: ------------------------------------------- 16-dec-2001 * Ported to C++ Builder 4. * Released for test as v4.1 FT5. 12-dec-2001 * Fixed C++ Builder name clash between TDropComboTarget.GetMetaFile and the GetMetaFile #define in wingdi.h 1-dec-2001 * The IAsyncOperation interface is now also declared as IAsyncOperation2 and all references to IAsyncOperation has been replaced with IAsyncOperation2. This was done to work around a bug in C++ Builder. Thanks to Jonathan Arnold for all his help with getting the components to work with C++ Builder. Without Jonathan's help version 4.1 would prabably have shipped witout C++ Builder support and certainly without any C++ Builder demos. * Demo applications for C++ Builder. The C++ Builder demos were contributed by Jonathan Arnold. 27-nov-2001 * TCustomDropTarget.Droptypes property renamed to DropTypes (notice the case). Thanks to Krystian Brazulewicz for spotting this. 24-nov-2001 * The GetURLFromString function in the DragDropInternet unit has been made public due to user request. 21-nov-2001 * Modified MakeHTML function to comply with Microsoft's description of the CF_HTML clipboard format. * Added MakeTextFromHTML function to convert CF_HTML data to plain HTML. Provides the reverse functionality of MakeHTML. * Added HTML support to TTextDataFormat class and TDropTextSource and TDropTextTarget components. * Fixed C++ Builder 5 problem with IAsyncOperation. * Released for test as v4.1 FT4. 10-nov-2001 * Added NetscapeDemo demo application. Demonstrates how to receive messages dropped from Netscape. This demo was sponsored by ThoughtShare Communications Inc. * Released for test as v4.1 FT3. 23-oct-2001 * Conversion priority of TURLDataFormat has been changed to give the File Group Descritor formats priority over the Internet Shortcut format. This resolves a problem where dropping an URL on the desktop would cause the desktop to assume that an Active Desktop item was to be created instead of an Internet Shortcut. Thanks to Allen Martin for reporting this problem. By luck this modification also happens to work around a bug in Mozilla and Netscape 6; Mozilla incorrectly supplies the UniformResourceLocator clipboard format in unicode format instead of ANSI format. Thanks to Florian Kusche for reporting this problem. * Added support for TFileGroupDescritorWClipboardFormat to TURLDataFormat. * Added declaration of FD_PROGRESSUI to DragDropFormats. * Added TURLWClipboardFormat which implements the "UniformResourceLocatorW" (a.k.a. CFSTR_INETURLW) clipboard format. Basically a Unicode version of CFSTR_SHELLURL/CFSTR_INETURL. The TURLWClipboardFormat class isn't used anywhere yet but will probably be supported by TURLDataFormat (and thus TDropURLTarget/TDropURLSource) in a later release. * Added experimental Shell Drag Image support. This relies on undodumented shell32.dll functions and probably won't be fully support before v4.2 (if ever). See InitShellDragImage in DropSource.pas. Thanks to Jim Kueneman for bringning these functions to my attention. 13-oct-2001 * TCustomDropSource.Destroy and TCustomDropMultiSource.Destroy changed to call FlushClipboard instead of EmptyClipboard. This means that clipboard contents will be preserved when the source application/component is terminated. * Added clipboard support to VirtualFileStream demo. * Modified VirtualFileStream demo to work around clipboard quirk with IStream medium. * Modified TCustomSimpleClipboardFormat to disable TYMED_ISTORAGE support by default. At present TYMED_ISTORAGE is only supported for drop targets and enabling it by default in TCustomSimpleClipboardFormat.Create caused a lot of clipboard operations (e.g. copy/paste of text) to fail. Thanks to Michael J Marshall for bringing this problem to my attention. * Modified TCustomSimpleClipboardFormat to read from the the TYMED_ISTREAM medium in small (1Mb) chunks and via a global memory buffer. This has resultet in a huge performance gain (several orders of magnitude) when transferring large amounts of data via the TYMED_ISTREAM medium. 3-oct-2001 * Fixed bug in TCustomDropSource.SetImageIndex. Thanks to Maxim Abramovich for spotting this. * Added missing default property values to TCustomDropSource. Thanks to Maxim Abramovich for spotting this. * DragDrop.pas and DragDropContext.pas updated for Delphi 4. * Reimplemented utility to convert DFM form files from Delphi 5/6 test format to Delphi 4/5 binary format. * Improved unregistration of Shell Extensions. Shell extension now completely (and safely) remove their registry entries when unregistered. * Deprecated support for C++ Builder 3. * Released for test as v4.1 FT2. 25-sep-2001 * Rewritten ContextMenuHandlerShellExt demo. The demo is now actually a quite useful utility which can be used to register and unregister ActiveX controls, COM servers and type libraries. It includes the same functionality as Borland's TRegSvr utility. 20-sep-2001 * Added support for cascading menus, ownerdraw and menu bitmaps to TDropContextMenu component. * Modified TFileContentsStreamOnDemandClipboardFormat to handle invalid parameter value (FormatEtcIn.lindex) when data is copied to clipboard. This works around an apparent bug in the Windows clipboard. Thanks to Steve Moss for reporting this problem. * Modified TEnumFormatEtc class to not enumerate empty clipboard formats. Thanks to Steve Moss for this improvement. 1-sep-2001 * Introduced TCustomDropTarget.AutoRegister property. The AutoRegister property is used to control if drop target controls should be automatically unregistered and reregistered when their window handle is recreated by the VCL. If AutoRegister is True, which is the default, then automatic reregistration will be performed. This property was introduced because the hidden child control, which is used to monitor the drop target control's window handle, can have unwanted side effects on the drop target control (e.g. TToolBar). * Deprecated support for Delphi 3. 22-jun-2001 * Redesigned TTextDataFormat to handle RTF, Unicode, CSV and OEM text without conversion. Moved TTextDataFormat class to DragDropText unit. Added support for TLocaleClipboardFormat. * Surfaced new text formats as properties in TDropTextSource and TDropTextTarget. Previous versions of the Text source and target components represented all supported text formats via the Text property. In order to enable users to handle the different text formats independantly, the text source and target components now has individual properties for ANSI, OEM, Unicode and RTF text formats. The text target component can automatically synthesize some of the formats from the others (e.g. OEM text from ANSI text), but applications which previously relied on all formats being represented by the Text property will have to be modified to handle the new properties. * Added work around for problem where TToolBar as a drop target would display the invisible target proxy window. * Fixed wide string bug in WriteFilesToZeroList. Thanks to Werner Lehmann for spotting this. 15-jun-2001 * Added work-around for Outlook Express IDataObject.QueryGetData quirk. 3-jun-2001 * Ported to C++ Builder 4 and 5. * Added missing DragDropDesign.pas unit to design time packages. * First attempt at C++ Builder 3 port.... failed. * Improved handling of oversized File Group Descriptor data. * Added support for IStorage medium to TFileContentsStreamClipboardFormat. This allows the TDropComboTarget component to accept messages dropped from Microsoft Outlook. This work was sponsored by ThoughtShare Communications Inc. 23-may-2001 * Ported to Delphi 4. * First attempt at C++ Builder 5 port.... failed. 18-may-2001 * Released as version 4.0. Note: Version 4.0 was released exclusively on the Delphi 6 Companion CD. * ContextMenuDemo and DropHandlerDemo application has been partially rewritten and renamed. ContextMenuDemo is now named ContextMenuHandlerShellExt. DropHandlerDemo is now named DropHandlerShellExt. * TDropContextMenu component has been rewitten. The TDropContextMenu now implements a context menu handler shell extension. In previous releases it implemented a drag drop handler shell extension. * The DragDropHandler.pas unit which implements the TDropHandler component has been renamed to DropHandler.pas. * Added new TDragDropHandler component. The new component, which lives in the DragDropHandler unit, is used to implement drag drop handler shell extensions. * Added DragDropHandlerShellExt demo application. * Removed misc incomplete demos from kit. * Fixed minor problem in VirtualFileStream demo which caused drops from the VirtualFile demo not to transfer content correctly. 11-may-2001 * Converted all demo forms to text DFM format. This has been nescessary to maintain compatibility between all supported versions of Delphi. * Fixed a bug in GetPIDLsFromFilenames which caused drag-link of files (dtLink with TDropFileSource) not to work. * Added readme.txt files to some demo applications. * Added missing tlb and C++ Builder files to install kit. * Released as FT4. 6-may-2001 * Added missing dfm files to install kit. * Tested with Delphi 5. Fixed Delphi 5 compatibility error in main.dfm of DragDropDemo. * Removed misc compiler warnings. * The AsyncTransferTarget and OleObjectDemo demos were incomplete and has been removed from the kit for the V4.0 release. The demos will be included in a future release. * Released as FT3. 3-may-2001 * Added missing dpr and bpg files to install kit. * Updated readme.txt with regard to lack of C++ Builder demos. * Released as FT2. 29-apr-2001 * Cleaned up for release. * Released as FT1. 23-feb-2001 * Modified TCustomDropTarget.FindTarget to handle overlapping targets (e.g. different targets at the same position but on different pages of a page control or notebook). Thanks to Roger Moe for spotting this problem. 13-feb-2001 * Renamed AsyncTransfer2 demo to AsyncTransferSource. * Added AsyncTransferTarget demo. * Replaced TChart in AsyncTransfer2 demo with homegrown pie-chart-thing. * Modified all IStream based target formats to support incremental transfer. * URW533 problem has finally been fixed. The cause of the problem, which is a bug in Delphi, was found by Stefan Hoffmeister. * Fixed free notification for TDropContextmenu and TDataFormatAdapter. 27-dec-2000 * Moved TVirtualFileStreamDataFormat and TFileContentsStreamOnDemandClipboardFormat classes from VirtualFileStream demo to DragDropFormats unit. * Added TClipboardFormat.DataFormat and TClipboardFormats.DataFormat property. * Added TDropEmptySource and TDropEmptyTarget components. These are basically do-nothing components for use with TDataFormatAdapter. * Rewritten AsyncTransfer2 demo. The demo now uses TDropEmptySource, TDataFormatAdapter and TVirtualFileStreamDataFormat to transfer 10Mb of data with progress feedback. * Rewritten VirtualFileStream demo. The demo now uses TDropEmptySource, TDropEmptyTarget, TDataFormatAdapter and TVirtualFileStreamDataFormat. * Fixed memory leak in TVirtualFileStreamDataFormat. This leak only affected the old VirtualFileStream demo. * Added support for full File Descriptor attribute set to TVirtualFileStreamDataFormat. It is now possible to specify file attributes such as file size and last modified time in addition to the filename. I plan to add similar features to the other classes which uses FileDescriptors (e.g. TDropFileSource and TDropFileTarget). 21-dec-2000 * Ported to Delphi 4. * Added workaround for design bug in either Explorer or the clipboard. Explorer and the clipboard's requirements to the cursor position of an IStream object are incompatible. Explorer requires the cursor to be at the beginning of stream and the clipboard requires the cursor to be at the end of stream. 15-dec-2000 * Fixed URW533 problem. I'll leave the description of the workaround in here for now in case the problem resurfaces. 11-dec-2000 * Fixed bug in filename to PIDL conversion (GetPIDLsFromFilenames) which affected TDropFileTarget. Thanks to Poul Halgaard J鴕gensen for reporting this. 4-dec-2000 * Added THTMLDataFormat. * Fixed a a few small bugs which affected clipboard operations. * Added {$ALIGN ON} to dragdrop.inc. Apparently COM drag/drop requires some structures to be word alligned. This change fixes problems where some of the demos would suddenly stop working. * The URW533 problem has resurfaced. See the "Known problems" section below. 13-nov-2000 * TCopyPasteDataFormat has been renamed to TFeedbackDataFormat. * Added support for the Windows 2000 "TargetCLSID" format with the TTargetCLSIDClipboardFormat class and the TCustomDropSource.TargetCLSID property. * Added support for the "Logical Performed DropEffect" format with the TLogicalPerformedDropEffectClipboardFormat class. The class is used internally by TCustomDropSource. 30-oct-2000 * Added ContextMenu demo and TDropContextMenu component. Demonstrates how to customize the context menu which is displayed when a file is dragged with the right mouse button and dropped in the shell. * Added TCustomDataFormat.GetData. With the introduction of the GetData method, Data Format classes can now be used stand-alone to extract data from an IDataObject. 20-oct-2000 * Added VirtualFileStream demo. Demonstrates how to use the "File Contents" and "File Group Descritor" clipboard formats to drag and drop virtual files (files which doesn't exist physically) and transfer the data on-demand via a stream. 14-oct-2000 * Added special drop target registration of TCustomRichEdit controls. TCustomRichEdit needs special attention because it implements its own drop target handling which prevents it to work with these components. TCustomDropTarget now disables a rich edit control's built in drag/drop handling when the control is registered as a drop target. * Added work around for Windows bug where IDropTarget.DragOver is called regardless that the drop has been rejected in IDropTarget.DragEnter. 12-oct-2000 * Fixed bug that caused docking to interfere with drop targets. Thanks to G. Bradley MacDonald for bringing the problem to my attention. 30-sep-2000 * The DataFormats property has been made public in the TCustomDropMultiTarget class. * Added VirtualFile demo. Demonstrates how to use the TFileContentsClipboardFormat and TFileGroupDescritorClipboardFormat formats to drag and drop a virtual file (a file which doesn't exist physically). 28-sep-2000 * Improved drop source detection of optimized move. When an optimized move is performed by a drop target, the drop source's Execute method will now return drDropMove. Previously drCancel was returned. The OnAfterDrop event must still be used to determine if a move operation were optimized or not. * Modified TCustomDropTarget.GetPreferredDropEffect to get data from the current IDataObject instead of from the VCL global clipboard. 18-sep-2000 * Fixed bug in DropComboTarget caused by the 17-sep-2000 TStreams modification. 17-sep-2000 * Added AsyncTransfer2 demo to demonstrate use of TDropSourceThread. * Renamed TStreams class to TStreamList. 29-aug-2000 * Added TDropSourceThread. TDropSourceThread is an alternative to Windows 2000 asynchronous data transfers but also works on other platforms than Windows 2000. TDropSourceThread is based on code contributed by E. J. Molendijk. 24-aug-2000 * Added support for Windows 2000 asynchronous data transfers. Added IAsyncOperation implementation to TCustomDropSource. Added TCustomDropSource.AllowAsyncTransfer and AsyncTransfer properties. 5-aug-2000 * Added work around for URW533 compiler bug. * Fixed D4 and D5 packages and updated a few demos. Obsolete DropMultiTarget were still referenced a few places. * Documented work around for C++ Builder 5 compiler error. See the Known Problems section later in this document for more information. 2-aug-2000 * The package files provided in the kit is now design-time only packages. In previous versions, the packages could be used both at design- and run-time. The change was nescessary because the package now contains design-time code. * Added possible work around for suspected C++ Builder bug. The bug manifests itself as a "Overloadable operator expected" compile time error. See the "Known problems" section of this document. * Rewrote CustomFormat1 demo. * Added CustomFormat2 demo. * TDataDirection members has been renamed from ddGet and ddSet to ddRead and ddWrite. * All File Group Descritor and File Contents clipboard formats has been moved from the DragDropFile unit to the DragDropFormats unit. * File Contents support has been added to TTextDataFormat. The support is currently only enabled for drop sources. * Renamed TDropMultiTarget component to TDropComboTarget. Note: This will break applications which uses the TDropMultiTarget component. You can use the following technique to port application from previous releases: 1) Install the new components. 2) Repeat step 3-8 for all units which uses the TDropMultiTarget component. 3) Make a backup of the unit (both pas and dfm file) just in case... 4) Open the unit in the IDE. 5) In the .pas file, replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 6) View the form as text. 7) Replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 8) Save the unit. * Renamed a lot of demo files and directories. * Added work around for yet another bug in TStreamAdapter. * Added TCustomStringClipboardFormat as new base class for TCustomTextClipboardFormat. This changes the class hierachy a bit for classes which previously descended from TCustomTextClipboardFormat: All formats which needs zero termination now descend from TCustomTextClipboardFormat and the rest descend from TCustomStringClipboardFormat. Added TrimZeroes property. Fixed zero termination bug in TCustomTextClipboardFormat and generally improved handling of zero terminated strings. Disabled zero trim in TCustomStringClipboardFormat and enabled it in TCustomTextClipboardFormat. 23-jul-2000 * Improved handling of long file names in DropHandler demo. Added work around for ParamStr bug. * Added TDataFormatAdapter component and adapter demo. TDataFormatAdapter is used to extend the existing source and target components with additional data format support without modifying them. It can be considered an dynamic alternative to the current TDropMultiTarget component. 17-jul-2000 * TDropHandler component and DropHandler demo fully functional. 14-jul-2000 * Tested with C++ Builder 5. * Fixed sporadic integer overflow bug in DragDetectPlus function. * Added shell drop handler support with TDropHandler component. This is a work in progress and is not yet functional. 1-jul-2000 * Tested with Delphi 4. * Support for Windows 2000 inter application drag images. * TRawClipboardFormat and TRawDataFormat classes for support of arbitrary unknown clipboard formats. The classes are used internally in the TCustomDropSource.SetData method to support W2K drag images. Platform: |
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Description: 该引擎实现BSP场景分割，非常有用，动态光照等等。大家下来看看，很不错的开源引擎！-The engine realize BSP scene segmentation, very useful, dynamic lighting and so on. Everyone down to see a good open-source engine! Platform: |
Size: 6567936 |
Author:dlhe |
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Description: 基于车辆动力学的作战坦克仿真源码，能较真实地模拟车辆的运动性能。-Tank Simulator is a software tool to simulate a battle Tank based on its vehicle dynamics. Vehicle dynamics allow simulations to contain parameters that most clearly approximate the dynamic performance of the vehicle. Tank Simulator is still under development and currently simulates only few vehicle parameters like weight, dimension, velocity, suspension and braking effects. The complete version will be one which will have all the vehicle parameters included and exhibits Track-Terrain interaction. The developmental activity uses a computational engine called Open Dynamics Engine (ODE), which is an industrial standard library to simulate articulated bodies. It provides interactive or real-time simulation. 3D Visual environment of the simulator uses a Graphics Library that is packaged with ODE. Functions have been added to this library to suit to the application’s need. The complete software is packaged as an integrated environment in Visual C++. Platform: |
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Author:王刚 |
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Description: Irrlicht引擎是一个用C++书写的高性能实时的3D引擎，可以应用于C++程序或者.NET语言中。通过使用Direct3D（Windows平台），OpenGL 1.2或它自己的软件着色程序，可以实现该引擎的完全跨平台。尽管是开源的，该Irrlicht库提供了可以在商业级的3D引擎上具有的艺术特性，例如动态的阴影，粒子系统，角色动画，室内和室外技术以及碰撞检测等。-Irrlicht engine is written in C++, a high-performance real-time 3D engine, can be applied to C++ program or. NET language. Through the use of Direct3D (Windows platform), OpenGL 1.2 shader or its own software program, you can realize the full cross-platform engine. Despite being open source, the Irrlicht library offers available in commercial-grade 3D engine that has the art features such as dynamic shadows, particle systems, character animation, indoor and outdoor technology, and collision detection.
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Author:leavegee |
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Description: This demo is powered by ODE (Open Dynamic Engine), a physic API made by Russell Smith. Press the left mouse button to shoot on some boxes. ODE can do so much more than just box physics, check it out here: ODE-This demo is powered by ODE (Open Dynamic Engine), a physic API made by Russell Smith. Press the left mouse button to shoot on some boxes. ODE can do so much more than just box physics, check it out here: ODE Platform: |
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Author:bokyaw |
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Description: 可以用于rigid body等动画的仿真open dynamic engine最新版本。本人已经创建工程的ODE，全国首发，SLN文件在\ode-0.11.1\build\vs2008下，打开为可以运行的sample程序。-Open dynamic engine, which is used to animation simulation, such as rigid body. It is called as physical engine. I have make the ODE to be a .Sln file. You guys can directly use it. Have fun! Platform: |
Size: 12651520 |
Author:刘昊 |
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Description: QCMS是一个小型网站管理系统，灵活，方便是最大特色，为初学者快速度架设网站首选。PHP+MYSQL 程序开源，模版分离，动态标签，只要会HTML就可以做出个性化的网站。
QCMS程序和网页代码分离，用户可以自主修改网页结构.网页和样式分离，使网页体积小巧，浏览更快速，对搜索引擎排位有很好的效果。同时还为Google，Baidu等生成Sitemap，在各搜索引擎都可以得到很好的排位。
-QCMS is a small web site management system, flexible and convenient feature is the largest for beginners setting up websites fast degree preferred. PHP+ MYSQL program open source, template separation, dynamic label, so long as it can make a personalized HTML website. QCMS separation procedures and code page, the user will be free to modify the page structure. Homepage and style separation, small size of web pages, browsing faster and have a good ranking on search engine results. Also to Google, Baidu, etc. generated Sitemap, in the search engine ranking can be very good. Platform: |
Size: 366592 |
Author:starlooker |
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Description: QCMS是一个小型网站管理系统，灵活，方便是最大特色，为初学者快速度架设网站首选。ASP+ACCESS，ASP+SQL，PHP+MYSQL 只要一个ASP或PHP空间即可直接架设，无需更多复杂的操作，程序开源，模版分离，动态标签，只要会HTML就可以做出个性化的网站。
QCMS程序和网页代码分离，用户可以自主修改网页结构.网页和样式分离，使网页体积小巧，浏览更快速，对搜索引擎排位有很好的效果。同时还为Google，Baidu等生成Sitemap，在各搜索引擎都可以得到很好的排位。-QCMS is a small web site management system, flexible and convenient feature is the biggest, how fast website hosting for the beginners choice. ASP+ ACCESS, ASP+ SQL, PHP+ MYSQL space as long as an ASP or PHP can be directly set up, no more complex operations, procedures, open source, template separation, dynamic tags, so long as HTML to make personalized website. QCMS separation procedures and code pages, the user can independently modify the page structure, web pages and style separate, small size of web pages, browse faster, have a good ranking on search engine results. But also for the Google, Baidu and other produce Sitemap, in the search engines can get a good ranking. Platform: |
Size: 283648 |
Author:金陆明 |
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Description: 织梦CMS是集简单、健壮、灵活、开源几大特点的开源内容管理系统,是国内开源CMS的领先品牌，目前程序安装量已达七十万,超过六成的站点正在使用织梦CMS或基于织梦CMS核心开发。
织梦Dede CMS功能特点：
良好的用户口碑，丰富的开源经验
灵活的模块组合，让网站更丰富
简单易用的模板引擎，网站界面想换就换
便捷自定义模型
高效的动态静态页面部署
流畅专业界面设计，良好的用户体验
指纹验证，升级无忧
低维护成本
国际语言支持
会员互动，让您的网站火起来-The woven dream CMS is a set of simple, robust, flexible, open source several major characteristics of open source content management system, is the leading brand of domestic open source CMS, the installation has reached 700,000, over 60 of sites are using woven The dream of CMS or CMS core development organizations dream. Woven dream Dede CMS features: a good user reputation, a wealth of open source experience and flexible combination of modules, make your site a richer and easy-to-use template engine, the web interface once the switch easy and smooth deployment of self-definition model and efficient dynamic static pages professional interface design, user experience fingerprint authentication, upgrade, worry-free low maintenance costs, international language support interaction among the members, so that your site fire up Platform: |
Size: 8270848 |
Author:张健 |
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Description: JSP源码,博客日记,云计算,博客系统
云乐BLOG（博客）2.0是一套基于云计算网站统一托管服务平台开发的快速、轻巧、易用的个人博客网站系统。
基于云计算技术，采用HTML技术，不含程序、不包含任何数据库、采用UTF-8编码，但是能够实现比 ASP,PHP,.NET,JSP,JAVA更好的网站效果。
Tag：云计算,博客系统,模板JAVA,CMS,开源,如何建立网站,免费,整站系统,建站,虚拟主机,域名,测试,安全,稳定,高速,日志,相册,音乐。
系统绝非纯HTML的下载资源，您下载后，放到云计算引擎，即能实现动态网站效果。
保障了网站的安全、稳定、高速，有效的解决了网站其他语言版本的兼容性问题。操作简单方便，功能强大。 -JSP source blog diary, cloud computing, the blog Yunle BLOG (blog) 2.0 is based on a set of cloud computing site unified managed service platform developed fast, lightweight, easy-to-use personal blog site system. The cloud-based technology, using HTML technology, without the program, does not contain any database, using UTF-8 encoding, but can be achieved than ASP, PHP, NET, JSP, JAVA better site performance. Tag: cloud computing, blog system, template JAVA, CMS, open source, and how to create a web site, free of charge, the whole station system, establishment, web hosting, domain names, testing, safe, stable, high-speed, log, albums, music. Not pure HTML download resources you downloaded into the cloud computing engine, that is able to achieve a dynamic website effect. Protection of the site' s security, stability, speed, and effectively solve the compatibility problems of the other language versions of the website. Easy to operate, powerful. Platform: |
Size: 463872 |
Author:sadfgadwi |
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Description: 通王网站内容管理系统(TWCMS)，由中国首家网络营销策划机构通王科技推出，基于PHP+MySQL的技术架构，完全开源加上强大稳定的技术架构，使你无论是目前打算做个小型网站，还是想让网站在不断壮大后仍能得到随意扩充都有充分的保证。
系统具备良好的用户体验，系统安全性极高，易用的模板引擎，后台可一键更换模板主题，系统可扩展性强，支持动态、伪静态、静态三种模式。-Through king web content management system (TWCMS), pass by China' s first network marketing planning agency Wang technology is introduced, based on the the technical architecture PHP+MySQL fully open source with a strong and stable technology architecture, so you both going to be a small site, or do you want to easily expand has fully guaranteed website still growing. System with a good user experience, the system is very safe, and easy-to-use template engine, the background can be a key to replace the template theme, system scalability, support for dynamic, pseudo-static, static three modes. Platform: |
Size: 1434624 |
Author:SDFEO |
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Description: 通王CMS(TWCMS)，基于PHP+MySQL架构，完全开源，支持动态、伪静态、静态三种模式。
通王CMS(TWCMS)特点：
程序完全符合SEO
良好的用户体验
系统安全性极高
程序完全不加密
系统可扩展性强
易用的模板引擎 -Through the king CMS (TWCMS,) based on PHP+MySQL architecture, fully open source, supports dynamic, pseudo-static, static three modes. Tong Wang CMS (TWCMS,) Features: The program is fully in line with SEO a good user experience highly secure program no encryption system scalability and easy-to-use template engine Platform: |
Size: 1492992 |
Author:hpudn51 |
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Description: Aviator是一个高性能、轻量级的java语言实现的表达式求值引擎，主要用于各种表达式的动态求值。现在已经有很多开源可用的java表达式求值引擎-Aviator is a high performance, lightweight Java language expression evaluation engine, mainly used for dynamic evaluation of various expressions. Now there are many open source available Java expression evaluation engine
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Author:黄加藤 |
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Description: tqcms企业管理系统是一个以asp+access进行开发的免费企业网站源码，该软件简单易用，快速上手管理无忧；模板引擎，让DIY如此简单；数据存储合理，效率性能得到最大的保障；流畅专业界面设计，良好的用户体验；灵活自定义，网站内容扩展更简单。 后台演示地址/admin/ 帐号密码都是admin 注意：如伪静态无法打开分类，请切换成动态模式运行-Tqcms of enterprise management system is a development with ASP+ access free enterprise website source code, the software is easy to use and get started quickly management worry free template engine, let DIY so simple reasonable data storage, performance efficiency get maximum protection professional and smooth interface design, a good user experience the flexibility to customize and website content expansion easier. Background demo address /admin/ account password is admin note: such as pseudo static can not open the classification, please switch to dynamic mode operation Platform: |
Size: 4340736 |
Author:陈丽 |
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Description: OEcms是一个基于PHP+MYSQL+Smarty、免费、开源的企业网站系统，系统内置了SEO搜索引擎优化机制，支持用户自定义多语言版， 拥有企业网站常用的模块功能（企业简介模块、新闻模块、产品模块、下载模块、图片模块、招聘模块、在线留言、在线交流、友情链接、网站地图、会员与权限管理）。强大灵活的后台管理功能、动态页面、静态页面自由切换功能、个性化模块、标签添加功能、不同栏目自定义样式功能等可为企业打造出大气漂亮且具有营销力的精品网站。-OEcms is a based on PHP+MYSQL+Smarty, free, open source enterprise website system. The system has built-in seo search engine optimization mechanism, supports user-defined multi language version, have enterprise web site commonly used functional modules (corporate profile module, news module, module products, download module, LED module, recruitment module, online message, online communication, friendship link, site map, membership and rights management). Flexible and powerful background management functions, dynamic pages, static pages are free to switch, personalized module, a label to add function, different sections of the custom style function for the enterprise to create beautiful atmosphere and marketing high-quality goods website. Platform: |
Size: 3860480 |
Author:yypudn24 |
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Description: OpenSceneGraph（OSG）是一个基于工业图形标准OpenGL的高层次图形开发APl接口，一款开放源代码的、具备商业级别渲染能力的实时三维渲染引擎，在国内外均已得到广泛的应用，并且已经有越来越多的虚拟现实行业开发者加入到OSG开发的行列中来。
本书的编写目的是：详细剖析OpenSceneGraph引擎的实现流程，包括其场景图形结构，几何体绘制和渲染状态的封装机制，场景漫游、交互和动画的实现方式，以及最为重要的对于三维渲染引擎的内部裁减、数据动态调度和多线程渲染机制的深入分析。本书对虚拟现实行业的爱好者和从业者、对愿意了解最新图形学相关技术发展，以及有志于开发自主知识产权的三维引擎系统的读者，均会大有助益。
本书可以作为计算机图形学或虚拟现实专业的高年级本科生和研究生教材使用，也可供三维图形学领域的专门研发人员，尤其是使用0penSceneGraph进行项目开发和科学研究的人员参考、学习。-OpenSceneGraph (OSG) is a development based on industry standard OpenGL graphics APl high-level graphical interfaces, an open source, commercial-grade rendering capabilities with real-time 3D rendering engine, at home and abroad have been widely used, and has been more and more virtual reality industry developers to join the ranks OSG developed in the past.
Write the purpose of this book is: a detailed analysis of OpenSceneGraph engine implementation process, including its scene graph structure, geometry rendering and encapsulation mechanism rendering state, the scene roaming implementation interaction and animation, as well as the most important for the three-dimensional rendering engine inside cut, in-depth analysis of data and multi-threaded rendering dynamic scheduling mechanism. Book industry virtual reality enthusiasts and practitioners of related graphics are willing to learn about the latest technological developments, as well as interested in the development of three-dimensio Platform: |
Size: 23246848 |
Author:苏尼玛 |
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Description: baigo CMS是一款开源、免费的网站内容管理系统。baigo Studio承诺该系统永久免费使用，并永久享受升级服务。
便捷的模板功能
baigo CMS采用互联网上使用最为广泛的Smarty模板技术，使用任何一款可视化网页制作工具便可轻松设计出baigo CMS支持的模板，无需学习复杂的语言。
伪静态伪模式
baigo CMS支持传统的动态页面模式、伪静态模式（需服务器相关支持），以便于搜索引擎收录。-Baigo CMS is an open source, free web content management system. Baigo Studio commitment to the system permanently free use, and permanent access to upgrade services.
Convenient template function
Baigo CMS uses the most widely used Smarty template technology on the Internet, the use of any one of the Visual Web authoring tools can easily design a template for the support of baigo CMS, no need to learn complex language.
Pseudo static pseudo pattern
Baigo CMS support for the traditional dynamic page mode, pseudo static mode (the need for server related support), in order to facilitate the search engine included. Platform: |
Size: 7779328 |
Author:zhaoke |
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Description: Xash3D is the powerful independent open-sourced 3D-engine, aimed for high compatibility with GoldSource engine formats (maps, models, textures, sounds, entities etc.), but with the intention to be an advanced platform for modmaking or game development. Technically it has been built from a scratch, using as totally original ideas, as some ideas from other 3D-engines. Xash3D overcomes obsolete GoldSource engine's limits and provides for you a new quality of gaming experience and modmaking capabilities, as extended map, model, texture & sound formats with higher limits, possibility to implement custom renderers with dynamic lighting and other modern features. Xash3D is the easy-to-use base to play existing Half-Life mods & create something new, impossible with GoldSource. Years of development & testing allowed to make from Xash3D a perfect mix of high compatibility with common GoldSource standards & high openness to creative modmaking ideas. Platform: |
Size: 1709711 |
Author:kekoukoule |
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Search - Open Dynamic Engine A