Thumb Drag in MVVM, WPF, C# -

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i have 1 working app writen in c# wpf. practice working mvvm write same app mvvm. came problem. there in app use 

<thumb dragdelta="thumb_drag"         dragstarted="thumb_dragstarted"        dragcompleted="thumb_dragcompleted"        ...

how write "drag&drop/draggable" example in mvvm? use "binding" or else? example welcome :) thanks!

if dont understand please ask me.

it's possible use system.windows.interactivitylibrary can added reference in project.

add namespace:

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

and call commands through <i:invokecommandaction>:

<thumb>     <i:interaction.triggers>         <i:eventtrigger eventname="dragdelta">             <i:invokecommandaction command="{binding datacontext.thumbdragdeltacommand, relativesource={relativesource ancestortype={x:type window}}}" />         </i:eventtrigger>     </i:interaction.triggers> </thumb>

viewmodel:

private icommand thumbdragdeltacommand { get; set;}  public mainviewmodel() //constructor {     thumbdragdeltacommand = new delegatecommand(x =>      {         //eventhandler         //do stuff...     } }

you can, however, still handle event in code-behind while still being committed mvvm-pattern long events trigger graphical changes.


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