Re: DND for XEmacs 21

Some time ago, Jonathan Harris wrote... |+ | Kirill M. Katsnelson wrote: | | > Let me pick a nit. Drag is initiated after mouse is moved minimum distance | > with a button down. | | I was paraphrasing the following from the MSVC++ 5.0 docs. Maybe the MS | docs are not self-consistant: | # Recommended user interface guidelines define the beginning of a drag | # operation as the selection of data and a WM_LBUTTONDOWN event | # occurring on a point inside the selected data. | | In practice many MS apps (eg MS Developer Studio 97, MS Word 95) appear | to behave like this, except that they delay a little to check that the | 'click' is actually a 'hold'. Good point. It appears that drag starts either after a timeout, when it is clear that it is a "Hold", not click, or after the pointer slips a bit, when it is clear that it is a "drag"... | But for a filemanager dnd the target app (ie XEmacs) can't pass any | information about the state of the modifiers to the source app (ie the | filemanager), so one can't implement the usual Move/Copy semantics for | even if one wanted to. Or am I missing something. No, you are not. File manager DND came from ancient times of windows 2.x. It is a very simple and featureless protocol, hardly even worthy to be called a protocol (it's one way). Modern applications should support OLE DND. Explorer of course does, so it uses the new protcol to an apllication which registers itself properly. Nevertheless I still think that even DND lite is a bin win for the current release. Kirill