If I write:
rootNode.expand()
I can only get access to the children nodes of this rootNode, but can't get access to the grandchildren nodes of this rootNode. I have to write:
rootNode.expandChildNodes()
in order to acheive it.
Is there another way to obtain the grandchildren or further children nodes even if the tree is collapsed? other than using node.eachChild() function?
I tried:
rootChildNode.firstChild
but it doesn't work.
ExtJS 4x has expandAll() method on the Tree Panel component. This will expand every node recursively.
if you want to expand to a partcular level then in that case:
expandTo:function(level){
treePanel.collapseAll();
treePanel.getRootNode().cascadeBy(function (node) {
if (node.getDepth() < level) { node.expand(); }
if (node.getDepth() == level) { return false; }
});
}
Another way to get to the descendants is to use node.expand(true), where node is the root node. Similarly, you can take any node within the tree and expand all of its descendant nodes using this same code. A common usage is for the selected node.
Related
I am working with ExtJS 4.2 and have two tree panels. I am also using treeviewdragdrop to be able to drag some nodes from left tree to right.
Now let me explain the problem I am having.
You can see that AMAZONE is the Service Alias and as soon you change something in that textfield, there is a listener on blur to update right tree's root text. Since its AMAZON now, the root is also AMAZON. Then you can drag items from left to right like i have in the picture (Yhoo, dbTask).
This is when I get into trouble. When I go back and change the SERVICE ALIAS, it changes the name but nodes disappear since I have to reload the root node again in order to see the updated root text. Is there a way to maybe update the view, that actually updates whatever changed were made. This what I have now.
This is the code
listners:
{
blur: function()
{
var root_node = right_tree.getRootNode();
root_node.data.text = new_alias_name;
right_tree.store.load(); // or reload()
}
}
I know I can save dropped node into a variable and as soon as I reload the tree, I can assign those as children. But something tells me there should be simpler way. Thnaks ;)
Use:
root_node.set('text', new_alias_name');
And remove the call to load.
I have a treegrid and I want to update just one node with its childs. So I have tried like this:
store.load({
node: store.getNodeById(1)
});
That updates childs, but not the node itself. So how can I update node and childs? It would be best if it would require just one request to the database.
There isn´t any way to do it by configuration, it just works as design. What you can do is a little trick after load the node's children in order to manipulate the tree nodes to update the node itself manually.
See the images. They show the behaviour you expect.
This is working okay in jsfiddle: http://jsfiddle.net/lontivero/jBTWn/3/
Basically, the idea is, as I just said, manipulate the tree after load the children. In my example this is done by:
var node = store.getNodeById(1);
store.load({
node: node,
callback: function(newRecord) {
var parent = node.parentNode;
parent.insertBefore(newRecord[0], node);
parent.removeChild(node);
},
params: {
json: Ext.JSON.encode(updated_data)
}
});
Good luck!
I want to know how to insert items into a treestore sorted, if there is a way within extjs to do this. I then want to have the items appear in a treepanel sorted, although there may already be some nodes in the treepanel;
So, that question may be, how do I have a treepanel reload what it is displaying based on what is within my store. Let me be clear, I do not want to reload the store from some datasource. I want to reload the panel to reflect what is contained within the store. What is the best way to go about this?
There is no real default way to do this. What your going to have to do is create an empty store on the page that uses the same model as the tree, something really simple like this:
var mySortStore = Ext.create("Ext.data.Store", {
model: "MyTreeStore",
data: []
});
Then when you go to add the node to the tree, use this function instead:
function addNodeSorted(node, childToBeAdded){
//clear the store from previous additions
mySortStore.removeAll();
//remove old sorters if they are dynamically changing
mySortStore.sort();
//add the node into the tree
node.appendChild(childToBeAdded);
var cn = node.childNodes,
n;
//remove all nodes from their parent and add them to the store
while ((n = cn[0])) {
mySortStore.add(node.removeChild(n));
}
//then sort the store like you would normally do in extjs, what kind of sorting you want is up to you
mySortStore.sort('height', 'ASC');//this is just an example
//now add them back into the tree in correct order
mySortStore.each(function(record){
node.appendChild(record);
});
}
I have a Tree Panel which I expand programmatically.
When I expand a node, I would like to "jump to" this node, I mean to scroll to it.
How to scroll a tree panel to a specific node ?
UPDATE:
I use Ext 4.1
Try using selectPath() http://docs.sencha.com/ext-js/4-0/#!/api/Ext.tree.Panel-method-selectPath
In extjs 3.x you can try calling focus() on the TreeNodeUI (myNode.ui.focus())
The tree is asynchronously loading every node, and you need to call to focus only after all the nodes have been loaded. What you are going to need to do is to set autoLoad to false on your root node, then later in the code manually load the root node for the first time using:
rootNode.expand(true, function(){
myTreePanel.getView().focusRow(nodeyouwanttofocus);
});
doing it this way allows you to use the first parameter of the expand function that makes the expand fully recursive and also assures that the second parameter that is a function only executes after all the nodes are loaded, guarenteeing that the view is the correct height and that the node exists visually.
Another option that allows more flexability is to hook into the expand event:
var myTreeStore = Ext.create("Ext.data.TreeStore", {
listeners: {
expand: function(theParentNode){
theParentNode.eachChild(function(node){
if(nodeIWantSelected == node)
myTreePanel.getView().focusRow(node);
}
}
}
});
and you can use the .select of the selection model to hook in to select the node (and I think it may focus the node too).
I haven't tried 'selectPath' as suggested by Sha before, which seems a lot easier to use, but you can hook in the focusRow function as the callback and I think that would work too.
You can use tree.getView().focusRow(), like it:
tree.expandPath(
'/root/1/2/3',
'id',
'/',
function() {
tree.getView().focusRow(tree.getStore().getNodeById('3'));
}
});
But, if your tree use animate: true and load every node asynchronously and any node in the path not loaded yet this approach doesnt work (tree is not scrolled to the selected node because of multiple layout updates).
As workaround you can:
set animate: false for tree;
add 'afterlayout' listener, like this:
tree.on('afterlayout', function() {
tree.getView().focusRow(tree.getSelectionModel().getSelection()[0]);
}
I guess you can add this handler when needed and remove it when everything is done.
I need to prevent tree node anchor from navigating current page, but the anchors have to keep showing its link (no hash).
I tried to put return false when it sets up the listener:
...
listeners : {
click : function (node) {
/* some processes */
return false;
}
}
...
Seems it is useless, the anchors are still firing its href.
I can't do onClick injection for all nodes, because the nodes are loaded on demand.
Any idea's?
I can't do onClick injection for all
nodes, because the nodes are loaded on
demand.
Not necessarily, have you thought about doing this with a different approach, i.e.:
YOURTREEPANELCOMPONENT.on('click',function(currentnode, clickevent){
// prevent href from being called and the page from loading
clickevent.stopEvent();
// what else to do when the node is clicked
});