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Draw a frame around the selected cell

Nik Clayton requested to merge nikclayton/opensudoku:frame-selection into develop

Previously the cell was highlighted by changing the background color.

This made it difficult to see the selected cell if the selection color is similar to the highlight color. It also made it impossible to tell if the selected cell was read-only.

Change this, and draw a frame around the selected cell. The background color is left unchanged, so it is easy to distinguish between the selected cell and highlighted cells, and the cell's read-only status is clear.


  • I have opened an issue where I discuss the change I wish to make.
  • I'm using my own branch in my local copy. Ej, I want to merge myuser/opensudoku:my-new-contribution into develop.
  • All commits are signed.
  • I agree to release my code and all other changes of this MR under the GNU GPLv3 license.
Edited by Nik Clayton

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