beginInsertRows was not declared ???

[travlr]

Hi all.

• My class, 'H5Model', is a QAbstractItemModel subclass.
• It is resized, on demand, when the QTreeView item is clicked.
• The class built fine until I added 'insertRows(...)' functionality using 'beginInsertRows(...)' and 'endInsertRows()' in the implementation, I get 2 build errors saying:

  'beginInsertRows' was not declared in this scope.

  'beginInsertRows' was not declared in this scope.

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  and

  'endInsertRows' was not declared in this scope.

  'endInsertRows' was not declared in this scope.

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• The declaration and implementation are below.
• 'H5Node::loadChildren()' is called twice, first time returns the number of children, second time actually appends the children to the data structure. (H5Node is the item data structure)
• I'm using Qt-4.5 last updated from the git repository on June 3, 2009.
• I'm using Qt-Creator and gcc when building.
• The build directory has been cleaned completely and qmake re-run before attempting to build.
• The "editabletreemodel" Qt example, which is similar, builds without any trouble.

So, given the situtation as it is stated above, I am baffled.
I certainly appreciate your help.

~travlr

h5model.h

#ifndef H5MODEL_H
 #define H5MODEL_H
 #include <QAbstractItemModel>
 #include <QModelIndex>
 #include <QVariant>
 
 class H5Node;
 
 class H5Model : public QAbstractItemModel
 {
     Q_OBJECT
 
 public:
     H5Model(QObject* parent=0);
     ~H5Model();
 
 
     // readonly
     QVariant data(const QModelIndex & index, int role) const;
     Qt::ItemFlags flags(const QModelIndex & index) const;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const;
     QModelIndex index(int row, int column, const QModelIndex & parent) const;
     QModelIndex parent(const QModelIndex & index) const;
     int rowCount(const QModelIndex & parent=QModelIndex()) const;
     int columnCount(const QModelIndex & parent=QModelIndex()) const;
 
     // resizeable
     bool insertRows(int row, int count, const QModelIndex & parent=QModelIndex());
 
public slots:
     void h5TreeClicked(const QModelIndex & index);
 
private:
     // variables
     H5Node* m_rootNode;
 };
 
 #endif // H5MODEL_H

#ifndef H5MODEL_H
 #define H5MODEL_H
 #include <QAbstractItemModel>
 #include <QModelIndex>
 #include <QVariant>

 class H5Node;

 class H5Model : public QAbstractItemModel
 {
     Q_OBJECT

 public:
     H5Model(QObject* parent=0);
     ~H5Model();


     // readonly
     QVariant data(const QModelIndex & index, int role) const;
     Qt::ItemFlags flags(const QModelIndex & index) const;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const;
     QModelIndex index(int row, int column, const QModelIndex & parent) const;
     QModelIndex parent(const QModelIndex & index) const;
     int rowCount(const QModelIndex & parent=QModelIndex()) const;
     int columnCount(const QModelIndex & parent=QModelIndex()) const;

     // resizeable
     bool insertRows(int row, int count, const QModelIndex & parent=QModelIndex());

public slots:
     void h5TreeClicked(const QModelIndex & index);
 
private:
     // variables
     H5Node* m_rootNode;
 };

 #endif // H5MODEL_H

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h5model.cpp

#include <QtGui>
 #include <QDebug>
 #include "h5node.h"
 #include "h5model.h"
 
 
 H5Model::H5Model(QObject* parent) : QAbstractItemModel(parent)
 {
     m_rootNode = new H5Node(H5Node::Root, "/data/data", 0);
     m_rootNode->loadChildren();
 }
 
 
 H5Model::~H5Model()
 {
     delete m_rootNode;
 }
 
 
 int H5Model::columnCount(const QModelIndex & parent) const
 {
     if (parent.isValid())
         return static_cast<H5Node*>(parent.internalPointer())->columnCount();
     else
         return m_rootNode->columnCount();
 }
 
 
 QVariant H5Model::data(const QModelIndex & index, int role) const
 {
     if (!index.isValid() || role != Qt::DisplayRole)
         return QVariant();
     H5Node* node = static_cast<H5Node*>(index.internalPointer());
     return node->data(index.column());
 }
 
 
 Qt::ItemFlags H5Model::flags(const QModelIndex & index) const
 {
     if (!index.isValid())
         return 0;
     return Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 }
 
 
 QVariant H5Model::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
         if (section == 0)
             return "Name";
         else if (section == 1)
             return "Type";
         else
             return QVariant();
     }
     return QVariant();
 }
 
 
 QModelIndex H5Model::index(int row, int column, const QModelIndex & parent) const
 {
     if (!hasIndex(row, column, parent))
         return QModelIndex();
     H5Node* parentItem;
     if (!parent.isValid())
         parentItem = m_rootNode;
     else
         parentItem = static_cast<H5Node*>(parent.internalPointer());
     H5Node* childItem = parentItem->child(row);
     if (childItem)
         return createIndex(row, column, childItem);
     else
         return QModelIndex();
 }
 
 
 QModelIndex H5Model::parent(const QModelIndex & index) const
 {
     if (!index.isValid())
         return QModelIndex();
     H5Node* childItem = static_cast<H5Node*>(index.internalPointer());
     H5Node* parentItem = childItem->parent();
     if (parentItem == m_rootNode)
         return QModelIndex();
     return createIndex(parentItem->row(), 0, parentItem);
 }
 
 
 int H5Model::rowCount(const QModelIndex & parent) const
 {
     H5Node* parentItem;
     if (parent.column() > 0)
         return 0;
     if (!parent.isValid())
         parentItem = m_rootNode;
     else
         parentItem = static_cast<H5Node*>(parent.internalPointer());
     return parentItem->childCount();
 }
 
 
 bool insertRows(int row, int count, const QModelIndex & parent)
 {
     Q_UNUSED(row)
     Q_UNUSED(count)
     H5Node* node = static_cast<H5Node*>(parent.internalPointer());
     int numChildren = node->loadChildren();
     if (numChildren == 0) {
         return false;
     }
     beginInsertRows(parent, 0, numChildren - 1);
     node->loadChildren();
     endInsertRows();
     return true;
 }
 
 
 // slot
 void H5Model::h5TreeClicked(const QModelIndex & index)
 {
     insertRows(0, 0, index);
 }

#include <QtGui>
 #include <QDebug>
 #include "h5node.h"
 #include "h5model.h"


 H5Model::H5Model(QObject* parent) : QAbstractItemModel(parent)
 {
     m_rootNode = new H5Node(H5Node::Root, "/data/data", 0);
     m_rootNode->loadChildren();
 }


 H5Model::~H5Model()
 {
     delete m_rootNode;
 }


 int H5Model::columnCount(const QModelIndex & parent) const
 {
     if (parent.isValid())
         return static_cast<H5Node*>(parent.internalPointer())->columnCount();
     else
         return m_rootNode->columnCount();
 }


 QVariant H5Model::data(const QModelIndex & index, int role) const
 {
     if (!index.isValid() || role != Qt::DisplayRole)
         return QVariant();
     H5Node* node = static_cast<H5Node*>(index.internalPointer());
     return node->data(index.column());
 }


 Qt::ItemFlags H5Model::flags(const QModelIndex & index) const
 {
     if (!index.isValid())
         return 0;
     return Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 }


 QVariant H5Model::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
         if (section == 0)
             return "Name";
         else if (section == 1)
             return "Type";
         else
             return QVariant();
     }
     return QVariant();
 }


 QModelIndex H5Model::index(int row, int column, const QModelIndex & parent) const
 {
     if (!hasIndex(row, column, parent))
         return QModelIndex();
     H5Node* parentItem;
     if (!parent.isValid())
         parentItem = m_rootNode;
     else
         parentItem = static_cast<H5Node*>(parent.internalPointer());
     H5Node* childItem = parentItem->child(row);
     if (childItem)
         return createIndex(row, column, childItem);
     else
         return QModelIndex();
 }


 QModelIndex H5Model::parent(const QModelIndex & index) const
 {
     if (!index.isValid())
         return QModelIndex();
     H5Node* childItem = static_cast<H5Node*>(index.internalPointer());
     H5Node* parentItem = childItem->parent();
     if (parentItem == m_rootNode)
         return QModelIndex();
     return createIndex(parentItem->row(), 0, parentItem);
 }


 int H5Model::rowCount(const QModelIndex & parent) const
 {
     H5Node* parentItem;
     if (parent.column() > 0)
         return 0;
     if (!parent.isValid())
         parentItem = m_rootNode;
     else
         parentItem = static_cast<H5Node*>(parent.internalPointer());
     return parentItem->childCount();
 }


 bool insertRows(int row, int count, const QModelIndex & parent)
 {
     Q_UNUSED(row)
     Q_UNUSED(count)
     H5Node* node = static_cast<H5Node*>(parent.internalPointer());
     int numChildren = node->loadChildren();
     if (numChildren == 0) {
         return false;
     }
     beginInsertRows(parent, 0, numChildren - 1);
     node->loadChildren();
     endInsertRows();
     return true;
 }


 // slot
 void H5Model::h5TreeClicked(const QModelIndex & index)
 {
     insertRows(0, 0, index);
 }

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[wysota]

Your "insertRows" function is not part of your class. You made it a standalone function instead of a class method.

[travlr]

Wysota I swear I looked for a solution a hundred times before I posted.

Doh!!!

I can't believe I did not see it...

... I HATE stupid mistakes.

Thank you so much... again!

~travlr