TreeView.zip_Qt QTreeView_Qt中的QTreeView_qt treeview使用_qttreeview

#include "TreeModel.h" TreeModel::TreeModel(QObject *parent): QAbstractItemModel(parent) { m_rootItem = new TreeItem( { "A", "B" } ); auto item1 = new TreeItem( { "asssssssss", "b" } ); auto item2 = new TreeItem( { "aassssssssssssssssssss", "bb" } ); auto item3 = new TreeItem( { "aaagggggggggggggggggggggggggggggggggggg", "bbb" } ); m_rootItem->appendChild(item1); item1->appendChild(item2); item2->appendChild(item3); } TreeModel::~TreeModel() { delete m_rootItem; } int TreeModel::columnCount(const QModelIndex &parent) const { if (parent.isValid()) { return static_cast<TreeItem*>(parent.internalPointer())->columnCount(); } else { return m_rootItem->columnCount(); } } QHash<int, QByteArray> TreeModel::roleNames() const { /* roleName可以自己定义，我这里是随便写的 */ QHash<int, QByteArray> names(QAbstractItemModel::roleNames()); names[12345] = "text"; names[12346] = "text2"; return names; } QVariant TreeModel::data(const QModelIndex &index, int role) const { if (!index.isValid()) { return QVariant(); } switch(role) { case 12345: { return static_cast<TreeItem*>(index.internalPointer())->data(0); } case 12346: { return static_cast<TreeItem*>(index.internalPointer())->data(1); } case Qt::DisplayRole: { return static_cast<TreeItem*>(index.internalPointer())->data(index.column()); } default: { return QVariant(); } } } Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const { if(!index.isValid()) { return 0; } return Qt::ItemIsEnabled | Qt::ItemIsSelectable; } QVariant TreeModel::headerData(int section, Qt::Orientation orientation, int role) const { if(orientation == Qt::Horizontal && role == Qt::DisplayRole) { return m_rootItem->data(section); } return QVariant(); } QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) const { if(!hasIndex(row, column, parent)) { return QModelIndex(); } TreeItem *parentItem; if(!parent.isValid()) { parentItem = m_rootItem; } else { parentItem = static_cast<TreeItem*>(parent.internalPointer()); } TreeItem *childItem = parentItem->child(row); if(childItem) { return createIndex(row, column, childItem); } else { return QModelIndex(); } } QModelIndex TreeModel::parent(const QModelIndex &index) const { if(!index.isValid()) { return QModelIndex(); } TreeItem *childItem = static_cast<TreeItem*>(index.internalPointer()); TreeItem *parentItem = childItem->parent(); if(parentItem == m_rootItem) { return QModelIndex(); } return createIndex(parentItem->row(), 0, parentItem); } int TreeModel::rowCount(const QModelIndex &parent) const { TreeItem *parentItem; if(parent.column() > 0) { return 0; } if(!parent.isValid()) { parentItem = m_rootItem; } else { parentItem = static_cast<TreeItem*>(parent.internalPointer()); } return parentItem->childCount(); } QAbstractItemModel *TreeModel::model() { return this; }