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//QTreeView中节点展开过程中自动调整表头的列宽，使被展开的节点不会被遮住
ui->treeView_Comm_SCL->header()->setResizeMode(QHeaderView::ResizeToContents);
//在QAbstractItemModel的派生类中进行QTreeView显示的美化：
//在data中可以设置树节点使用的图标
QVariant ServerModel::data(const QModelIndex &index, int role) const
{ if(role != Qt::DisplayRole
&& role != Qt::DecorationRole)
return QVariant();
ServerNode* node = NodeFromIndex(index);
if(0 == node)
return QVariant();
if(Qt::DisplayRole == role)
{ switch(index.column())
{ case 0:
return node->NodeName();
case 1:
// return node->NodeComment();
return node->NodeValue();
default:
return QVariant();
}
}
else if(Qt::DecorationRole == role) //set icon for tree view
{ switch (index.column())
{ case 0:
return node->NodeIcon();
default:
return QVariant();
}
}
return QVariant();
}
//在headerData中可以设置表头的图标与表头每列所占的初始化宽度，避免树节点被遮挡
QVariant ServerModel::headerData(int section, Qt::Orientation orientation, int role) const{ if(orientation == Qt::Horizontal && role == Qt::DisplayRole)
{ if(section == 0)
{ return QObject::trUtf8("Model Node Name"); }
else if(section == 1)
{ return QObject::trUtf8("Comment"); }
return QVariant();
}
//set Icon for QTreeView header
if(orientation == Qt::Horizontal && role == Qt::DecorationRole)
{ if(section == 0)
{ return QIcon(QPixmap(QString::fromUtf8(":/Widget/Catalogue/WidgetIcon/Catalogue/tree.png"))); }
else if(section == 1)
{ QIcon listIcon(QPixmap(QString::fromUtf8(":/Widget/Catalogue/WidgetIcon/Catalogue/list.png"))); return listIcon;
}
else
{ return QVariant();
}
}
//set Colume width
if(orientation == Qt::Horizontal && role == Qt::SizeHintRole)
{ if(section == 0)
{ return QSize(300,20);
}
else if(section == 1)
{ return QSize(100,20);
}
else
{ return QVariant();
}
}
return QVariant();
}
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