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POInsert and delete rows in QTreeView
 

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  1. POInsert and delete rows in QTreeView
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    <p>Good day, I Have base model inherited from QAbstractItemModel, and some background threads which notify this model from time to time, in examples the insertions rows implemens somthing like this </p> <pre><code>bool TreeModel::insertRows(int position, int rows, const QModelIndex &amp;parent) { TreeItem *parentItem = getItem(parent); bool success; beginInsertRows(parent, position, position + rows - 1); success = parentItem-&gt;insertChildren(position, rows, rootItem-&gt;columnCount()); endInsertRows(); return success; } </code></pre> <p>But I can't do it like this because my model is single which uses 4 views, I've implemented my insertion this way:</p> <pre><code>void notifyEventImpl(file_item_type *sender,helper&lt;ITEM_ACTION_ADDED&gt;) { base_class::setSize(file_item_type::size()+sender-&gt;size()); m_listDirectory.push_back(sender); file_item_type::filesystem_type::s_notify.insert(this); // notify my model } </code></pre> <p>Where <code>s_notify</code> is a class with implementation:</p> <pre><code> void Notifaer::dataChange(void * item){emit dataChanged(item);} void Notifaer::remove(void * item){emit removed(item);} void Notifaer::insert(void * item){emit inserted(item);} void Notifaer::push_back(const FileItemModel * model) { VERIFY(QObject::connect(this,SIGNAL(dataChanged(void*)),model,SLOT(dataChangeItem(void*)) )); VERIFY(QObject::connect(this,SIGNAL(removed(void*)),model,SLOT(removeItem(void*)) )); VERIFY(QObject::connect(this,SIGNAL(inserted(void*)),model,SLOT(insertItem(void*)) )); } </code></pre> <p>Given this, I invoke the method:</p> <pre><code>void FileItemModel::insertItem(void *it) { file_item_type *item = dynamic_cast&lt;file_item_type*&gt;(static_cast&lt;file_item_type*&gt;(it)); { QModelIndex index = createIndex(0,0,item); if (index.isValid()) { beginInsertRows(index, 0, item-&gt;childCount()-1); endInsertRows(); } } } void FileItemModel::removeItem(void *it) { file_item_type *item = static_cast&lt;file_item_type*&gt;(it); { QModelIndex index = createIndex(0,0,item); if (index.isValid()) { beginRemoveRows(index, 0, item-&gt;childCount()-1); endRemoveRows(); } } } </code></pre> <p>Remove rows works perfectly, but insert does not work. What's wrong in my implementation?</p>
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    1. This table or related slice is empty.
    1. PTQuestion
    1. USJames
    1. USTopilski Alexandr
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    2. PL
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. VO
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    1. COCan you give more details about how insert "does not work"? Does it crash (if so, what's the error message?), do nothing, or do something else?
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      1. USJames
    2. COsimple not appear new row
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      1. USTopilski Alexandr
 

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