Tweak Tool: supports select & tweak on LMB (with RMB-select key-map)

Support for differentiating the tweak tool from the 3D cursor when
select is set to RMB.

This is currently an experimental preference:
Tweak Tool: Left Mouse Select & Drag

When enabled the tweak tool can now tweak the existing selection
without de-selecting first, a single click can be used to replace
the selection.
This matches selection in the graph & node editors.

This preferences is only available with "Developer Extras" enabled.

Ref T96544.

1 files changed, 17 insertions, 0 deletions

diff --git a/release/scripts/presets/keyconfig/keymap_data/blender_default.py b/release/scripts/presets/keyconfig/keymap_data/blender_default.py
index 80794d9f23d..ac9258d53ca 100644
--- a/release/scripts/presets/keyconfig/keymap_data/blender_default.py
+++ b/release/scripts/presets/keyconfig/keymap_data/blender_default.py
@@ -31,6 +31,7 @@ class Params:
         "context_menu_event",
         "cursor_set_event",
         "cursor_tweak_event",
+        "use_tweak_tool_lmb_interaction",
         "use_mouse_emulate_3_button",
 
         # User preferences:
@@ -102,6 +103,7 @@ class Params:
             use_gizmo_drag=True,
             use_fallback_tool=False,
             use_fallback_tool_rmb=False,
+            use_tweak_tool_lmb_interaction=False,
             use_v3d_tab_menu=False,
             use_v3d_shade_ex_pie=False,
             use_v3d_mmb_pan=False,
@@ -129,6 +131,7 @@ class Params:
                 self.tool_maybe_tweak_value = 'PRESS'
             else:
                 self.tool_maybe_tweak_value = 'CLICK_DRAG'
+            self.use_tweak_tool_lmb_interaction = use_tweak_tool_lmb_interaction
 
             self.context_menu_event = {"type": 'W', "value": 'PRESS'}
 
@@ -150,6 +153,7 @@ class Params:
             self.action_mouse = 'RIGHTMOUSE'
             self.tool_mouse = 'LEFTMOUSE'
             self.tool_maybe_tweak_value = 'CLICK_DRAG'
+            self.use_tweak_tool_lmb_interaction = False
 
             if self.legacy:
                 self.context_menu_event = {"type": 'W', "value": 'PRESS'}
@@ -457,6 +461,19 @@ def _template_items_tool_select(params, operator, cursor_operator, fallback, *,
              {"properties": [(extend, True)]}),
         ]
     else:
+        # Experimental support for LMB interaction for the tweak tool.
+        if params.use_tweak_tool_lmb_interaction and not fallback:
+            return [
+                (operator, {"type": 'LEFTMOUSE', "value": 'PRESS'},
+                 {"properties": [("deselect_all", True), ("select_passthrough", True)]}),
+                (operator, {"type": 'LEFTMOUSE', "value": 'CLICK'},
+                 {"properties": [("deselect_all", True)]}),
+                (operator, {"type": 'LEFTMOUSE', "value": 'PRESS', "shift": True},
+                 {"properties": [("deselect_all", False), ("toggle", True)]}),
+                ("transform.translate", {"type": 'LEFTMOUSE', "value": 'CLICK_DRAG'},
+                 {"properties": [("release_confirm", True)]}),
+            ]
+
         # For right mouse, set the cursor.
         return [
             (cursor_operator, {"type": 'LEFTMOUSE', "value": 'PRESS'}, None),