BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  how to get GraphicClass from file extension?          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message mustapha.wang Guest Posted: Mon Oct 09, 2006 8:11 am    Post subject: how to get GraphicClass from file extension? In Graphics.pas,delphi provided function as below: function GraphicFilter(GraphicClass: TGraphicClass): string; function GraphicExtension(GraphicClass: TGraphicClass): string; function GraphicFileMask(GraphicClass: TGraphicClass): string; But,How can I get a GraphicClass from a extension? Always,I need to save graphic into database,extension and stream. When I read it from database,I need a function to get GraphicClass. I suggest delphi move class "TFileFormatsList" and variable "FileFormats" up to interface block. Back to top C-H Guest Posted: Mon Oct 09, 2006 6:28 pm    Post subject: Re: how to get GraphicClass from file extension? "mustapha.wang" <mustapha.wang (AT) 163 (DOT) com> wrote: Quote: But,How can I get a GraphicClass from a extension? Peter Below came up with a solution in this newsgroup not long ago. Search for thread with >GetIMGType<. /C-H Back to top mustapha.wang Guest Posted: Tue Oct 10, 2006 5:50 am    Post subject: Re: how to get GraphicClass from file extension? Thnak you,I googled it at: http://groups.google.com/group/borland.public.delphi.graphics/browse_thread/thread/2c453649508bdc3d/b461ac88eeaadbcd?lnk=st&q=delphi+GetIMGType&rnum=1&hl=zh-CN#b461ac88eeaadbcd But,it is not graceful.It used a enumeration: const IMGTypes: array[0..3] of TImgDescriptor = ((ext:'.gif'; classtype: TGifImage), (ext:'.jpg'; classtype: TJpegImage), (ext:'.png'; classtype: TPngImage), (ext:'.bmp'; classtype: TBitmap)); For a plugin system,I don`t kownow how many other Graphics will be registered beforehand. I strongly suggest delphi open class "TFileFormatsList" and variable "FileFormats". Back to top Mike Lischke Guest Posted: Tue Oct 10, 2006 8:11 am    Post subject: Re: how to get GraphicClass from file extension? mustapha.wang wrote: Quote: For a plugin system,I don`t kownow how many other Graphics will be registered beforehand. I think my GraphicEx library is something you would appreciate. It not only supports many graphics formats (sig, png, tiff, gif etc.) but also has the ability to determine the image type from a stream. No file extension is needed! Use the link in the sig to get to the library. Mike -- www.soft-gems.net Back to top mustapha.wang Guest Posted: Thu Oct 12, 2006 6:33 am    Post subject: Re: how to get GraphicClass from file extension? Oh,Thanks. I see you code.Really,you also meet the same problem.You writed your own "TFileFormatList".Then,another user`s new graphic must use your "TFileFormatList" to register.They accept this as a standard? Why not ask "Team B" to open it for us? Back to top Mike Williams (TeamB) Guest Posted: Fri Oct 13, 2006 3:06 am    Post subject: Re: how to get GraphicClass from file extension? mustapha.wang wrote: Quote: Why not ask "Team B" to open it for us? Open what? You've lost me ... -- -Mike (TeamB) Back to top mustapha.wang Guest Posted: Wed Oct 18, 2006 8:11 am    Post subject: Re: how to get GraphicClass from file extension? Open class "TFileFormatsList" and variable "FileFormats" up to interface block. Back to top Mike Williams (TeamB) Guest Posted: Wed Oct 18, 2006 6:29 pm    Post subject: Re: how to get GraphicClass from file extension? mustapha.wang wrote: Quote: Open class "TFileFormatsList" and variable "FileFormats" up to interface block. Oh, I see. I think you meant to say that *Borland* should include those in the interface. This would be a good suggestion for Quality Central: http://qc.borland.com TeamB does not work for Borland: http://www.teamb.com -- -Mike (TeamB) Back to top David Berneda Guest Posted: Sun Oct 22, 2006 5:43 am    Post subject: Re: how to get GraphicClass from file extension? Sometime ago (april 2005) I submitted one QC report very similar, and it's "open" http://qc.borland.com/wc/qcmain.aspx?d=11837 regards david www.teechart.com "Mike Williams (TeamB)" <mlwi!!iams@gmail!.com> wrote in message news:xn0esm2t6416xqr001 (AT) newsgroups (DOT) borland.com... Quote: mustapha.wang wrote: Open class "TFileFormatsList" and variable "FileFormats" up to interface block. Oh, I see. I think you meant to say that *Borland* should include those in the interface. This would be a good suggestion for Quality Central: http://qc.borland.com Back to top mustapha.wang Guest Posted: Wed Nov 15, 2006 6:45 am    Post subject: Re: how to get GraphicClass from file extension? Oh,sorry,I opined that "Team B" is a department of Borland maintaining Delphi. "Mike Williams (TeamB)" <mlwi!!iams@gmail!.com> ?¤J®ø®§ news:xn0esm2t6416xqr001 (AT) newsgroups (DOT) borland.com... Quote: mustapha.wang wrote: Open class "TFileFormatsList" and variable "FileFormats" up to interface block. Oh, I see. I think you meant to say that *Borland* should include those in the interface. This would be a good suggestion for Quality Central: http://qc.borland.com TeamB does not work for Borland: http://www.teamb.com -- -Mike (TeamB) Back to top mustapha.wang Guest Posted: Wed Nov 15, 2006 6:48 am    Post subject: Re: how to get GraphicClass from file extension? It seems Borland not deal with that. "David Berneda" <david (AT) steema (DOT) com> ?¤J®ø®§ news:453abe31 (AT) newsgroups (DOT) borland.com... Quote: Sometime ago (april 2005) I submitted one QC report very similar, and it's "open" http://qc.borland.com/wc/qcmain.aspx?d=11837 regards david www.teechart.com "Mike Williams (TeamB)" <mlwi!!iams@gmail!.com> wrote in message news:xn0esm2t6416xqr001 (AT) newsgroups (DOT) borland.com... mustapha.wang wrote: Open class "TFileFormatsList" and variable "FileFormats" up to interface block. Oh, I see. I think you meant to say that *Borland* should include those in the interface. 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