StartDragging doesn't be trigged

[coater]

procedure Chromium1StartDragging doesn't be trigged when some words or link were be dragged.
Only Chromium1DragEnter was trigged.

What wrong may I mistake?

[salvadordf]

TChromium.OnStartDragging only works in OSR mode.

[coater]

Thank you!

If I drag a object, Chromium1DragEnter will be triggered two times, how to judge starting and enter?

[salvadordf]

I tried to replicate that issue with 2 demos (normal mode and osr mode) and I only saw that event one time.

Are you setting "Result" to false to continue with the default drag handling behavior ?

[coater]

Oh,
I don't set Result := true;
Thank you again for your kind help!

[coater]

Code: Select all

onDragEnter(Sender: TObject;
  const browser: ICefBrowser; const dragData: ICefDragData; mask: Cardinal;
  out Result: Boolean);

begin

  if Dragtime2<Dragtime1 then
     Dragtime2 := Now
    else
    Dragtime1 := Now;  {}
    Result := true;
    if  MilliSecondsBetween(Dragtime1,Dragtime2)>500 then

      begin
       if  dragData.IsLink then
         begin
           aurlstr := dragData.GetLinkUrl;
           SendMessage(Handle, MINIBROWSER_DRAGDATA_MESSAGE, 0, LParam(@aurlstr));
         end else
             begin
               atitle :=  dragData.GetFragmentText;
               if atitle <> ''  then
                   SendMessage(Handle, MINIBROWSER_DRAGDATA_MESSAGE, 1, LParam(@atitle));
             end;
      end;


end;

---------------------------------------
Result := true doesn't act on repeating send.( Chromium1DragEnter will be triggered many times). so I have to add time condition.
Is there a precedure such as onDragrelease? when drag was release the procedure will be triggered.

[salvadordf]

If your application uses the OSR mode then you can use a custom TChromiumCore with different versions of these procedures :

• TChromiumCore.DragTargetDrop(const event: PCefMouseEvent)
• TChromiumCore.DragTargetDragLeave

[coater]

If normal mode was used, how to solve this problem? Thank you!

[salvadordf]

The CEF project maintainer suggest using JavaScript to be notified of drag and drop events :
https://magpcss.org/ceforum/viewtopic.php?f=6&t=17115
https://magpcss.org/ceforum/viewtopic.php?f=6&t=13058
https://stackoverflow.com/questions/704564/disable-drag-and-drop-on-html-elements

[coater]

Ok, Thank you!