Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. detect whether collapsed node has selected child node
Forum Updated to NodeBB v4.3 + New Features

detect whether collapsed node has selected child node

Scheduled Pinned Locked Moved Solved General and Desktop
6 Posts 2 Posters 428 Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • U Offline
    U Offline
    user4592357
    wrote on last edited by user4592357
    #1

    when a node in my tree view is collapsed, i emit a signal:

    void Tree::onNodeCollapsed(const QModelIndex &index)
    {
    	// get the collapsed node
    	auto pNode = static_cast<TreeNode *>(index.internalPointer());
    
    	// execute collapse routine
    	pNode->onCollapsed();
    
    	// update the model
    	getTreeModel()->updateModel();
    
    	// inform about node collapse in tree view
    	emit nodeCollapsed(pNode);
    }
    

    later, in a slot:

    void SomeObject::onTreeNodeCollapsed(TreeNode *pNode)
    {
        if (pNode has a selected child)
        {
            // 
        }
        else
        {
            //
        }
    }
    

    how can i determine this?

    1 Reply Last reply
    0
    • mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi
      Seems you are using a custom model so just guessing/asking.
      Well cant u ask the selected index,
      what its parent is and then compare
      the parent TreeNode with the pNode ?

      U 1 Reply Last reply
      1
      • mrjjM mrjj

        Hi
        Seems you are using a custom model so just guessing/asking.
        Well cant u ask the selected index,
        what its parent is and then compare
        the parent TreeNode with the pNode ?

        U Offline
        U Offline
        user4592357
        wrote on last edited by
        #3

        @mrjj
        ah right. an then do this recursively for the outer levels

        mrjjM 1 Reply Last reply
        0
        • U user4592357

          @mrjj
          ah right. an then do this recursively for the outer levels

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @user4592357
          Hi
          Yes if those are parentless.
          If you dont have millions of items in the model, should be fine.

          U 1 Reply Last reply
          1
          • mrjjM mrjj

            @user4592357
            Hi
            Yes if those are parentless.
            If you dont have millions of items in the model, should be fine.

            U Offline
            U Offline
            user4592357
            wrote on last edited by
            #5

            @mrjj
            my bad, i'm noticing only now. my question was not about selected node, but rather a collapsed one. how can i know whether the collapsed node has selected child nodes?

            mrjjM 1 Reply Last reply
            0
            • U user4592357

              @mrjj
              my bad, i'm noticing only now. my question was not about selected node, but rather a collapsed one. how can i know whether the collapsed node has selected child nodes?

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #6

              @user4592357
              Well if the current selected index's parents is the
              collapsed node then it has. else not.

              1 Reply Last reply
              1

              • Login

              • Login or register to search.
              • First post
                Last post
              0
              • Categories
              • Recent
              • Tags
              • Popular
              • Users
              • Groups
              • Search
              • Get Qt Extensions
              • Unsolved