tdf#124155 fix slider to not go beyond rect bounds

We need to ask the NWF for the size of the thumb and not just use
the hard-coded value.

Reviewed-on: https://gerrit.libreoffice.org/70201
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit 9956cf0692058414ef3efdb0e8058fbb0b39f6bc)

Change-Id: I98c6b5782c6a043fc358198ddf844d36d7aa90d6

1 files changed, 1 insertions, 0 deletions

diff --git a/include/vcl/slider.hxx b/include/vcl/slider.hxx
index 426727c15ae7..ab7c035e52cc 100644
--- a/include/vcl/slider.hxx
+++ b/include/vcl/slider.hxx
@@ -36,6 +36,7 @@ private:
     long            mnThumbPixOffset;
     long            mnThumbPixRange;
     long            mnThumbPixPos;
+    long            mnThumbSize;
     long            mnChannelPixOffset;
     long            mnChannelPixRange;
     long            mnChannelPixTop;