On 22 March 2012 11:59, Hans-Peter Diettrich <DrDiettrich1@...> wrote: > > Inter-process D&D requires special assistance by the OS. IMO such operations > are limited to drop file names, or other pure text, unless a platform offers > something like OLE-DragDrop.
That shouldn't be a problem for Lazarus LCL then, seeing that "everything is native" and all Lazarus's target desktop platforms support inter-process DND - yet the full inter-process DND support in LCL is still missing. Will this be fixed before the 1.0 release? Most OS's these days can and do use mime-types (just like the whole internet does) for DND. But obviously each OS/platform has a different way in which they transfer data between processes (I guess this is what you meant by "like OLE-DragDrop"). Anyway, fpGUI uses mime-types for DND, for in-app and cross-process DND. Under Windows, I still have support for the older-style DND (eg: where data types are registered as STRING or WIDESTRING like the clipboard etc). In the case of fpGUI under Windows, I simply map those older data types to similar mime-types automatically. X11 uses mime-types as-is (so no mapping or trickery required under X11). Mac OS X also has mime-type DND support. What's nice about X11's DND support is that no data is generated or transferred until it is actually known that the drop target accepted the drop. Windows unfortunately is not that clever and generates the data resources when the DND action starts at the source, not when the drop target accepts the drop. So Windows is a bit waist-full with resources (what's new). -- Regards, - Graeme - _______________________________________________ fpGUI - a cross-platform Free Pascal GUI toolkit http://fpgui.sourceforge.net -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
