Change touch scroll detection to pointer-input-sensor approach using signals/events.

1 files changed, 59 insertions, 1 deletions

diff --git a/logic/database.gd b/logic/database.gd
index 4f3e613..41ba679 100644
--- a/logic/database.gd
+++ b/logic/database.gd
@@ -31,7 +31,8 @@ onready var stage: Stage = get_node("/root/main/stage")
 onready var delete_button: Button = get_node("actions/delete")
 onready var edit_button: Button = get_node("actions/edit")
 onready var add_button: Button = get_node("actions/add")
-onready var v_scroll_bar: ScrollBar = get_v_scroll()
+onready var v_scroll_bar: ScrollBar = get_v_scroll() # @DAM Stop scroll inertia when buttons are pressed.
+onready var drag_sensor: PointerInputSensor = get_node("drag_sensor")
 
 
 func _init():
@@ -44,15 +45,72 @@ func _init():
 func _ready():
 	self.connect("item_selected", self, "item_selected")
 	self.connect("nothing_selected", self, "clear_selection")
+	
 	delete_button.connect("pressed", self, "delete_action")
 	edit_button.connect("pressed", self, "edit_action")
 	add_button.connect("pressed", self, "add_action")	
+	
 	stage.connect("save", self, "save")
 	stage.connect("discard", self, "discard")
+	
+	drag_sensor.connect("on_press", self, "on_press")
+	drag_sensor.connect("on_drag", self, "on_drag")
+	drag_sensor.connect("on_end_drag", self, "on_end_drag")
+	drag_sensor.connect("on_click", self, "on_click")
+	
 	for it in db:
 		self.add_item(get_entry_view(it))
 
 
+# @DAM Cleanup this code.
+export var scroll_velocity_decaying_factor: float = 2.5
+var drag_velocity := 0.0
+var is_dragging := false
+
+func _process(delta: float):
+	if is_dragging == false && abs(drag_velocity) > 0.5:
+		drag_velocity *= clamp((1.0 - scroll_velocity_decaying_factor * delta), 0.0, 1.0)
+		v_scroll_bar.value -= drag_velocity * delta
+
+func on_click(pointer: PointerInputSensor.PointerInputData):
+	var target := self
+	var position := target.get_global_mouse_position() - target.rect_global_position
+	
+	var event_touch := InputEventScreenTouch.new()
+	event_touch.index = 0
+	event_touch.position = position
+	
+	var event_mouse := InputEventMouseButton.new()
+	event_mouse.button_index = BUTTON_LEFT
+	event_mouse.button_mask = BUTTON_MASK_LEFT
+	event_mouse.position = position
+	
+	event_mouse.pressed = true
+	event_touch.pressed = true
+	target._gui_input(event_mouse)
+	target._gui_input(event_touch)
+	
+	target.grab_focus()
+	
+	event_mouse.pressed = false
+	event_touch.pressed = false
+	target._gui_input(event_mouse)
+	target._gui_input(event_touch)
+
+func on_press(pointer: PointerInputSensor.PointerInputData):
+	is_dragging = true
+
+func on_end_drag(pointer: PointerInputSensor.PointerInputData):
+	is_dragging = false
+
+func on_drag(pointer: PointerInputSensor.PointerInputData):
+	is_dragging = true
+	drag_velocity = pointer.velocity.y
+	v_scroll_bar.value -= pointer.relative_position.y
+
+
+
+
 func _notification(what: int):
 	if visible == false:
 		return