Implement tiling_drag_threshold

Implements `tiling_drag_threshold <threshold>` to prevent accidental
dragging of tiling containers. If a container (and all of its
descendants) are unfocused and the tile bar is pressed, a threshold
will be used before actually starting the drag. Once the threshold has
been exceeded, the cursor will change to the grab icon and the operation
will switch from `OP_MOVE_TILING_THRESHOLD` to `OP_MOVE_TILING`.

1 files changed, 9 insertions, 0 deletions

diff --git a/sway/sway.5.scd b/sway/sway.5.scd
index e6abef56..37a9b24c 100644
--- a/sway/sway.5.scd
+++ b/sway/sway.5.scd
@@ -572,6 +572,15 @@ The default colors are:
         the _floating\_mod_ will also allow the container to be dragged. _toggle_
         should not be used in the config file.
 
+*tiling\_drag\_threshold* <threshold>
+        Sets the threshold that must be exceeded for an unfocused tiling container
+        to be dragged by its titlebar. This has no effect if _floating\_mod_ is
+        used, if the container is focused, or if _tiling\_drag_ is set to
+        _disable_. Once the threshold has been exceeded once, the drag starts and
+        the cursor can come back inside the threshold without stopping the drag.
+        _threshold_ is multiplied by the scale of the output that the cursor on.
+        The default is 9.
+
 *title\_align* left|center|right
         Sets the title alignment. If _right_ is selected and _show\_marks_ is set
         to _yes_, the marks will be shown on the _left_ side instead of the