Put grab on sweep-selecting in Edit Position

A right down-click starting a sweep-selection event did not grab the
mouse events, so that an up-click outside the window would go
unnoticed, and the pointer motion stayed coupled to selecting the
piece until the next click. By returning 2 from the RightClick back-end
routine we request the grab.

diff --git a/backend.c b/backend.c
index 21562ab..e73b5c6 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -7136,7 +7136,7 @@ int RightClick(ClickType action, int x, int y, int *fromX, int *fromY)
        toX = xSqr; toY = ySqr; lastX = x, lastY = y;
        if(flipView) toX = BOARD_WIDTH - 1 - toX; else toY = BOARD_HEIGHT - 1 - toY;
        NextPiece(0);
-       return -2;
+       return 2; // grab
       case IcsObserving:
        if(!appData.icsEngineAnalyze) return -1;
       case IcsPlayingWhite: