Adds ability to swap tools (Shift + x as an initial shortcut) (#1173)

* Use Shift + x as a shortcut to swap tools

* rename it to swap tools, instead of switch tools

project.godot

@@ -362,6 +362,11 @@ right_pan_tool={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":true,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":77,"physical_keycode":0,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 ]
 }
+swap_tools={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":true,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":88,"physical_keycode":0,"key_label":0,"unicode":88,"location":0,"echo":false,"script":null)
+]
+}
 show_pixel_grid={
 "deadzone": 0.5,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"command_or_control_autoremap":true,"alt_pressed":false,"shift_pressed":false,"pressed":false,"keycode":72,"physical_keycode":0,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)

src/Autoload/Global.gd

@@ -883,6 +883,7 @@ func _initialize_keychain() -> void:
 		&"brush_size_increment": Keychain.InputAction.new("", "Buttons"),
 		&"brush_size_decrement": Keychain.InputAction.new("", "Buttons"),
 		&"change_tool_mode": Keychain.InputAction.new("", "Tool modifiers", false),
+		&"swap_tools": Keychain.InputAction.new("", "Tool modifiers", false),
 		&"draw_create_line": Keychain.InputAction.new("", "Draw tools", false),
 		&"draw_snap_angle": Keychain.InputAction.new("", "Draw tools", false),
 		&"draw_color_picker": Keychain.InputAction.new("Quick color picker", "Draw tools", false),

src/Autoload/Tools.gd

@@ -517,6 +517,32 @@ func swap_color() -> void:
 	assign_color(left, MOUSE_BUTTON_RIGHT, false)
 
 
+func swap_tools() -> void:
+	if MOUSE_BUTTON_LEFT and MOUSE_BUTTON_RIGHT in _slots.keys():
+		var left_slot: Slot = _slots[MOUSE_BUTTON_LEFT]
+		var right_slot: Slot = _slots[MOUSE_BUTTON_RIGHT]
+		if left_slot.tool_node:
+			if (
+				left_slot.tool_node.has_method("get_config")
+				and right_slot.tool_node.has_method("get_config")
+				and left_slot.tool_node.has_method("set_config")
+				and right_slot.tool_node.has_method("set_config")
+				and left_slot.tool_node.has_method("update_config")
+				and right_slot.tool_node.has_method("update_config")
+			):
+				var left_name := left_slot.tool_node.name
+				var right_name := right_slot.tool_node.name
+				var left_config: Dictionary = left_slot.tool_node.get_config()
+				var right_config: Dictionary = right_slot.tool_node.get_config()
+				# Now interchange tools
+				assign_tool(left_name, MOUSE_BUTTON_RIGHT)
+				assign_tool(right_name, MOUSE_BUTTON_LEFT)
+				_slots[MOUSE_BUTTON_LEFT].tool_node.set_config(right_config)
+				_slots[MOUSE_BUTTON_RIGHT].tool_node.set_config(left_config)
+				_slots[MOUSE_BUTTON_LEFT].tool_node.update_config()
+				_slots[MOUSE_BUTTON_RIGHT].tool_node.update_config()
+
+
 func assign_color(color: Color, button: int, change_alpha := true, index: int = -1) -> void:
 	var c: Color = _slots[button].color
 	# This was requested by Issue #54 on GitHub

src/UI/ToolsPanel/ToolButtons.gd

@@ -19,6 +19,9 @@ func _unhandled_input(event: InputEvent) -> void:
 		if event.is_action_pressed(action):
 			return
 
+	if event.is_action_pressed("swap_tools"):
+		Tools.swap_tools()
+
 	for tool_name in Tools.tools:  # Handle tool shortcuts
 		if not get_node(tool_name).visible:
 			continue