i try to make a small app, that you can add some GraphNode(write some text in it) to a GraphEdit, have some connection between them, and save them all and can load them later.
now i can save and load the GraphNode's size, positon, and other things, but i can't save connections.
i can't get the name of the instance and really don't know what to do.
can any one help?
Great thanks!
it is my code:
extends Control
var spn = load("res://scences/nodes/graphnode.tscn")
var inipositon = Vector2(40,40)
var node_index = 0
var allsavedata = []
var savedata = []
var newnodes = []
var connections = []
onready var p_edit = $VBoxContainer/GraphEdit
func onsavebuttonpressed():
#下面两个是全面清空数据，从当下node情况来储存
get_new_node()
all_save_data = []
save_data = []
var file = File.new()
# 把node转换成一个一个json
for i in new_nodes:
# 这里就是拿child里的node的方法，其实就是你知道node名字就行了
var n = i.get_node("TextEdit")
var p = i.rect_position
var s = i.rect_size
var id = 0
# 这里是制作一个dic，里面就是node需要被存储的各种信息
var n_data = {
"node_text": n.text,
"node_pos_x": p.x,
"node_pos_y": p.y,
"node_width": s.x,
"node_height": s.y
}
#存到总data里
save_data.append(n_data)
#print("存的数据",n_data)
# 把node信息与connection信息合成一个总arry，放在一个文件里
all_save_data = [save_data, connections]
file.open("user://node_save_test.json", file.WRITE)
file.store_line(to_json(all_save_data))
file.close()
func onloadbuttonpressed():
getnewnode()
clearallnodes()
var file = File.new()
file.open("user://node_save_test.json", file.READ)
var data = JSON.parse(file.get_as_text())
# 这里后面必须加个.result否则只是一个json的怪格式
all_save_data = data.result
file.close()
load_nodes()
读取node信息并创建
func loadnodes():
newnodes = []
# 读node信息部分
for i in all_save_data[0]:
var node = spn.instance()
node.get_node("TextEdit").text = i["node_text"]
# 奇怪，用offset就行，rect_positon就不行
node.offset = Vector2(i["node_pos_x"],i["node_pos_y"])
# 大小也奇怪，必须用rect_min_size而rect_size就不行
node.rect_min_size = Vector2(i["node_width"], i["node_height"])
p_edit.add_child(node)
# 读connection信息部分
for i in all_save_data[1]:
print("链接：", i)
p_edit.connect_node(i["from"], i["from_port"], i["to"], i["to_port"])
func clearallnodes():
pedit.clearconnections()
for i in pedit.getchildren():
if i is GraphNode:
i.free()
func checknode():
var nodelist = $GraphEdit.getconnectionlist()
print("slot链接信息:")
print(node_list)
func onbackpressed():
gettree().changescene("res://scences/Sctest_menu.tscn")
func onButtonpressed():
# fun里可以定义var，然后instance（）就是做了一个实例
var node = spn.instance()
node.offset += inipositon + (nodeindex*Vector2(20,20))
pedit.addchild(node)
nodeindex += 1
func onGraphEditconnectionrequest(from, fromslot, to, toslot):
pedit.connectnode(from, fromslot, to, toslot)
func onGraphEditdisconnectionrequest(from, fromslot, to, toslot):
pedit.disconnectnode(from, fromslot, to, toslot)
下面这个就是拿到当下所有node的信息，存和读之前都要执行
func getnewnode():
var allnode = pedit.getchildren()
newnodes = []
for i in allnode:
if i.hasnode("TextEdit"):
new_nodes.append(i)
else:
pass
var node_list = p_edit.get_connection_list()
connections = node_list
func oninfobuttonpressed():
for i in connections:
print("from:",i["from"])
print("list:", connections)