Hotspot highlighting UI update problem

[sanastasiou]

Hello all,

I’m implementing a plugin, which amongst other offers reference highlighting and following, just like in Visual Studio Ctrl+Click go to definition.

The code that I’m using to highlight the hotspot is this:

        int aReferenceColor = GetReferenceLinkColor();
        _win32Helper.ISendMessage(Plugin.nppData._scintillaMainHandle,   SciMsg.SCI_STYLESETHOTSPOT, (int)_previousReferenceToken.Type, 1);
        _win32Helper.ISendMessage(Plugin.nppData._scintillaSecondHandle, SciMsg.SCI_STYLESETHOTSPOT, (int)_previousReferenceToken.Type, 1);

        _win32Helper.ISendMessage(Plugin.nppData._scintillaMainHandle, SciMsg.SCI_SETHOTSPOTACTIVEUNDERLINE, 1, 0);
        _win32Helper.ISendMessage(Plugin.nppData._scintillaSecondHandle, SciMsg.SCI_SETHOTSPOTACTIVEUNDERLINE, 1, 0);
        _win32Helper.ISendMessage(Plugin.nppData._scintillaMainHandle, SciMsg.SCI_SETHOTSPOTSINGLELINE, 1, 0);
        _win32Helper.ISendMessage(Plugin.nppData._scintillaSecondHandle, SciMsg.SCI_SETHOTSPOTSINGLELINE, 1, 0);

        _win32Helper.ISendMessage(Plugin.nppData._scintillaMainHandle, SciMsg.SCI_SETHOTSPOTACTIVEFORE, 1, aReferenceColor);
        _win32Helper.ISendMessage(Plugin.nppData._scintillaSecondHandle, SciMsg.SCI_SETHOTSPOTACTIVEFORE, 1, aReferenceColor);
        _win32Helper.ISendMessage(_nppHelper.GetCurrentScintilla(Plugin.nppData), SciMsg.SCI_STARTSTYLING, _previousReferenceToken.BufferPosition, 0);
        _win32Helper.ISendMessage(_nppHelper.GetCurrentScintilla(Plugin.nppData), SciMsg.SCI_SETSTYLING, _previousReferenceToken.EndColumn - _previousReferenceToken.StartColumn, (int)_previousReferenceToken.Type);

This works, however only after moving the mouse a bit. The exactly opposition happens when I try to “hide” a hotspot. It first get’s removed after moving the mouse.

So, it appears there is some problem with UI update/render? Is there any way to “force” a render somehow?

Or, am I wrong in the way I am trying to highlight my hotspots?

Thanks a lot!