Block: Allow to grab focus

Set the focus mode on Blocks so they can process input events. When
dragged on the canvas, set the dropped block to be focused. Note the
subtle interaction between FocusMode.FOCUS_ALL, which allows focusing by
mouse click, and MouseFilter.MOUSE_FILTER_IGNORE, which filters out
mouse click events. The combination means that the mouse click will be
handled in Godot for focusing the block, but the mouse click can't be
processed in _gui_input().

Author: dbnicholson

addons/block_code/drag_manager/drag_manager.gd

@@ -79,6 +79,7 @@ func drag_ended():
 
 	if block:
 		connect_block_canvas_signals(block)
+		block.grab_focus()
 
 	_block_canvas.release_scope()
 

addons/block_code/ui/blocks/block/block.gd

@@ -47,6 +47,7 @@ func _set_bottom_snap_path(value: NodePath):
 func _ready():
 	if bottom_snap == null:
 		_set_bottom_snap_path(bottom_snap_path)
+	focus_mode = FocusMode.FOCUS_ALL
 	mouse_filter = Control.MOUSE_FILTER_IGNORE
 
 

addons/block_code/ui/blocks/control_block/control_block.tscn

@@ -5,6 +5,7 @@
 
 [node name="ControlBlock" type="MarginContainer"]
 size_flags_horizontal = 0
+focus_mode = 2
 mouse_filter = 2
 script = ExtResource("1_2hbir")
 block_name = "control_block"

addons/block_code/ui/blocks/entry_block/entry_block.tscn

@@ -4,9 +4,9 @@
 [ext_resource type="Script" path="res://addons/block_code/ui/blocks/entry_block/entry_block.gd" id="2_3ik8h"]
 
 [node name="EntryBlock" instance=ExtResource("1_byjbb")]
+focus_mode = 2
 script = ExtResource("2_3ik8h")
 signal_name = ""
-defaults = {}
 block_name = "entry_block"
 label = "EntryBlock"
 block_type = 1

addons/block_code/ui/blocks/parameter_block/parameter_block.tscn

@@ -18,8 +18,9 @@ corner_radius_bottom_left = 16
 offset_right = 16.0
 offset_bottom = 8.0
 size_flags_horizontal = 0
+focus_mode = 2
+mouse_filter = 2
 script = ExtResource("1_0hajy")
-defaults = null
 block_name = "parameter_block"
 label = "Param"
 block_type = 3

addons/block_code/ui/blocks/statement_block/statement_block.tscn

@@ -7,6 +7,7 @@
 
 [node name="StatementBlock" type="MarginContainer"]
 size_flags_horizontal = 0
+focus_mode = 2
 mouse_filter = 2
 script = ExtResource("1_6wvlf")
 block_name = "statement_block"