QTree / QStandardItemModel中的多个列

Question

我的项目需要你的宝贵知识;我需要做一个至少有3列的树。我所拥有的是一个"Actions"列表，如下所示:

typedef struct Action
{
    int ID;
    int parentID;
    char* ident;
    char* text;
}

"Actions"列表(pListActions)如下所示:

ID  ParentID     ident              text
1   0           "root"        "this is my root"
2   1           "element1"    "1st element"
3   1           "element2"    "2nd element"
4   0           "root2"       "this is another root"
...
...

和相应的树，我可以用我的代码生成:

ID      ident       text
1
|-2
|-3
4

如你所见，我只有第一列，但我需要有其他列。我已经尝试了setItem方法，但我不知道如何找到正确的行…事实上，我需要将一行的所有内容"链接"在一起;如果我插入一个新行，我想保持ID和相应的标识/文本之间的链接。

生成树(第一列)的代码:

QStandardItemModel *standardModel = new QStandardItemModel; //My model for the tree
standardModel->setColumnCount(3);
QStandardItem *rootNode = standardModel->invisibleRootItem();
for (auto it=std::begin(*this->pListActions);it!=std::end(*this->pListActions);it++) //I add all the elements in my list of actions
    {
        Action* pa = *it;
        QStandardItem *myNewItem= new QStandardItem(QString::number(pa->ID));   //The new item ID
        myNewItem->setCheckable(1);
    //Looking for a potential parent (with the action->parentID value
    //FindItemParent is the index of the element il the standardModel with the same ID as the current parentID (only one or zero because the ID is unique)
        QModelIndexList FindItemParent= standardModel->match(standardModel->index(0,0),Qt::DisplayRole,QVariant::fromValue(QString::number(pa->parentID)),2,Qt::MatchRecursive);
        if(!FindItemParent.empty())//If a parent exists
        {
            standardModel->itemFromIndex(FindItemParent.front())->appendRow(myNewItem);//add the current item to the parent in the standardModel
        }
        else {  //No parents
            rootNode->appendRow(myNewItem); //add the element to the root
        }
    }
    //drawing the tree
    QTreeView *tree = new QTreeView;    //Arbre affiché à l'aide du QTreeView
    tree->setModel(standardModel);
    tree->expandAll();
    tree->show();

和我想要的最终结果:

ID      ident       text
1       root        this is my root
|-2     element1    1st element
|-3     element2    2nd element
4       root2       this is another root

Answer 1

我终于找到了如何使用更容易的QTreeWidget来做到这一点。方法如下:

QTreeWidget *finalTree = new QTreeWidget;   
finalTree->setColumnCount(3);
QTreeWidgetItem *root = new QTreeWidgetItem;    //Racine de la séquence
root->setText(0,"ROOT");
finalTree->addTopLevelItem(root);
for (auto it=std::begin(*this->pListActions);it!=std::end(*this->pListActions);it++)
{
    Action* pa = *it; 
        QTreeWidgetItem *myNewItem = new QTreeWidgetItem;   
        myNewItem->setText(0,QString::number(pa->ID)); 
        myNewItem->setText(1,pa->ident);
        myNewItem->setText(1,pa->type);

        QList<QTreeWidgetItem*> foundAParent;
        foundAParent = finalTree->findItems(QString::number(pa->parentID),Qt::MatchContains | Qt::MatchRecursive,0);
        if (!foundAParent.empty())
        {
            foundAParent.front()->addChild(myNewItem);
        }
        else
        {
            root->addChild(myNewItem);
        }
        finalTree->addTopLevelItem(root);
}

finalTree->show();