feat: complete mobile UI implementation

project/atlas_test.gd

@@ -67,6 +67,54 @@ func _run() -> void:
 	drag.position = Vector2(140, 120)
 	atlas._on_map_input(drag)
 	_ck(atlas._map.position != old_pos, "atlas left drag moves map")
+	# 移动端地图用单指平移；第二根手指出现后，当前拖动必须被冻结，不能
+	# 把双指手势继续解释成地图移动或世界点地。
+	atlas._recenter_map()
+	var single_down := InputEventScreenTouch.new()
+	single_down.index = 4
+	single_down.pressed = true
+	single_down.position = Vector2(120, 120)
+	atlas._on_map_input(single_down)
+	var single_drag := InputEventScreenDrag.new()
+	single_drag.index = 4
+	single_drag.position = Vector2(160, 145)
+	single_drag.relative = Vector2(40, 25)
+	atlas._on_map_input(single_drag)
+	_ck(atlas._map.position != atlas._map_origin, "atlas single-finger touch drag moves map")
+	var single_up := InputEventScreenTouch.new()
+	single_up.index = 4
+	single_up.pressed = false
+	single_up.position = single_drag.position
+	atlas._on_map_input(single_up)
+	atlas._recenter_map()
+	var first_down := InputEventScreenTouch.new()
+	first_down.index = 5
+	first_down.pressed = true
+	first_down.position = Vector2(120, 120)
+	atlas._on_map_input(first_down)
+	var second_down := InputEventScreenTouch.new()
+	second_down.index = 6
+	second_down.pressed = true
+	second_down.position = Vector2(300, 120)
+	atlas._on_map_input(second_down)
+	var before_two_finger_drag: Vector2 = atlas._map.position
+	var two_finger_drag := InputEventScreenDrag.new()
+	two_finger_drag.index = 5
+	two_finger_drag.position = Vector2(220, 220)
+	two_finger_drag.relative = Vector2(100, 100)
+	atlas._on_map_input(two_finger_drag)
+	_ck(atlas._map.position == before_two_finger_drag,
+			"two-finger map gesture does not pan from one finger")
+	var first_up := InputEventScreenTouch.new()
+	first_up.index = 5
+	first_up.pressed = false
+	first_up.position = two_finger_drag.position
+	atlas._on_map_input(first_up)
+	var second_up := InputEventScreenTouch.new()
+	second_up.index = 6
+	second_up.pressed = false
+	second_up.position = Vector2(300, 120)
+	atlas._on_map_input(second_up)
 	var reset := InputEventMouseButton.new()
 	reset.button_index = MOUSE_BUTTON_RIGHT
 	reset.pressed = true