将节点从 jstree 拖到外部 div 元素上,然后在放下时执行操作
我已经有一个 jstree 正在工作,现在希望能够将某些类型的节点拖动到外部 div 元素(包含由 highcharts 生成的图表)。我实际上并不希望从树中删除该节点,也不想要该节点的副本。我只是想要删除节点的操作来使用节点的 ID 更新图表。
我想我可以解决图表更新的问题,但这是使用 jstree 拖/放的过程,我发现有点令人困惑。另外,我只希望某些类型的节点可拖动(任何具有 rel="ds" 属性的节点)。
我对此很挣扎,但还没有走得太远。这就是我必须要做的:
$("#statstree").jstree({
"json_data" : {
"ajax" : {
"url" : "test.json",
"data" : function (n) {
return { id : n.attr ? n.attr("id") : 0 };
},
"progressive_render" : true
}
},
"types" : {
"valid_children" : [ "root" ],
"types" : {
"folder" : {
"icon" : {
"image" : "images/folder.png"
},
"valid_children" : [ "default" ],
//"max_depth" : 2,
"hover_node" : true,
"show_checkboxes" : false
},
"default" : {
"icon" : {
"image" : "images/folder.png"
},
"valid_children" : [ "default" ]
},
"hover_node" : false
}
},
"themes" : {
"theme" : "classic",
"dots" : false,
"icons" : true
},
"core" : { "html_titles" : true },
"dnd" : {
"drop_target" : "#test_area",
"drop_finish" : function (data) {
if(data.o.attr("rel") === "ds") {
//update chart with new data here?
//using data.o.attr("id")
}
}
},
"crrm" : { move : { check_move : function (m) { return false; } } },
"plugins" : ["themes","json_data","dnd","ui","types","crrm"]
});
我在某处读到绑定“before.jstree”事件可以帮助阻止某些节点被拖动(还有 crrm 位)。但我认为我做错了。看来“start_drag”无权访问 data.args[0]:
$("#statstree").bind("before.jstree", function (e, data) {
if(data.func === "start_drag" && data.args[0].parent("li").attr("rel") != "ds") {
e.stopImmediatePropagation();
return false;
}
});
有人知道我如何完成此任务吗?
干杯:)
编辑:我已经想出了如何阻止非“ds”节点被丢弃在该区域:
"drag_check" : function (data) {
if(data.r.attr("rel") != "ds") {
return false;
}
return {
after : false,
before : false,
inside : true
};
}
我现在将完善我的问题:
我怎样才能如果我有多个 drop_targets,如何获取目标的 ID? "drop_target" : "#testarea1, #testarea2"
编辑 2
哦,边走边回答我的问题!我已经坐在那里盯着这个看了很多年了。一瞬间我就想到了:
data.r.attr("id")
Edit 3
现在唯一剩下的问题是,尽管所有没有 rel="ds 属性的节点" 无法“拖放到”外部 div/图表中,当将鼠标悬停在允许的区域上时,它们仍然显示 jstree 绿色勾号图标。有什么想法如何阻止这种情况发生吗?
I have got a jstree working, and now want to be able to drag certain types of nodes to an external div element (containing a chart generated by highcharts). I don't actually want the node to be removed from the tree, nor do I want a copy of the node. I simply want the action of dropping the node to update the chart using the node's ID.
I think I can work out the chart updating bit, but it is the process of dragging/dropping with jstree I am finding a little confusing. Plus I only want certain types of nodes to be draggable (any with an attribute of rel="ds").
I'm struggling quite a bit with it, and haven't got very far. This is where I have got to:
$("#statstree").jstree({
"json_data" : {
"ajax" : {
"url" : "test.json",
"data" : function (n) {
return { id : n.attr ? n.attr("id") : 0 };
},
"progressive_render" : true
}
},
"types" : {
"valid_children" : [ "root" ],
"types" : {
"folder" : {
"icon" : {
"image" : "images/folder.png"
},
"valid_children" : [ "default" ],
//"max_depth" : 2,
"hover_node" : true,
"show_checkboxes" : false
},
"default" : {
"icon" : {
"image" : "images/folder.png"
},
"valid_children" : [ "default" ]
},
"hover_node" : false
}
},
"themes" : {
"theme" : "classic",
"dots" : false,
"icons" : true
},
"core" : { "html_titles" : true },
"dnd" : {
"drop_target" : "#test_area",
"drop_finish" : function (data) {
if(data.o.attr("rel") === "ds") {
//update chart with new data here?
//using data.o.attr("id")
}
}
},
"crrm" : { move : { check_move : function (m) { return false; } } },
"plugins" : ["themes","json_data","dnd","ui","types","crrm"]
});
I read somewhere that binding a 'before.jstree' event could help out with blocking certain nodes from being dragged (and the crrm bit too). But I think I am doing it wrong. It appears that "start_drag" doesn't have access to data.args[0]:
$("#statstree").bind("before.jstree", function (e, data) {
if(data.func === "start_drag" && data.args[0].parent("li").attr("rel") != "ds") {
e.stopImmediatePropagation();
return false;
}
});
Anyone got any ideas how I can achieve this task?
Cheers :)
EDIT: I've since worked out how to stop non 'ds' nodes being dropped on the area:
"drag_check" : function (data) {
if(data.r.attr("rel") != "ds") {
return false;
}
return {
after : false,
before : false,
inside : true
};
}
I'll refine my question now:
How can I get the target's ID if I have multiple drop_targets? "drop_target" : "#testarea1, #testarea2"
EDIT 2
Doh, answering my quesitons as I go along! And I've been sitting staring at this for ages now. It's all coming to me in a flash:
data.r.attr("id")
Edit 3
Now the only remaining issue is that although all nodes which don't have an attribute of rel="ds" cannot be 'dropped' into the external div/chart, they still show a jstree green tick icon when hovering over the permitted area/s. Any ideas how to stop this from happening?
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检查 valid_children 选项。
Check the valid_children option.