QStringListModel是最简单的模型类,具备向视图提供字符串数据的能力。QStringListModel是一个可编辑的模型,可以为组件提供一系列字符串作为数据。
下面我们通过一个例子来看看QStringListModel的使用。首先是我们的构造函数:
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MyListView::MyListView()
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{
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QStringList data;
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data << "Letter A" << "Letter B" << "Letter C";
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model = new QStringListModel(this);
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model->setStringList(data);
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listView = new QListView(this);
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listView->setModel(model);
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QHBoxLayout *btnLayout = new QHBoxLayout;
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QPushButton *insertBtn = new QPushButton(tr("insert"), this);
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connect(insertBtn, SIGNAL(clicked()), this, SLOT(insertData()));
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QPushButton *delBtn = new QPushButton(tr("Delete"), this);
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connect(delBtn, SIGNAL(clicked()), this, SLOT(deleteData()));
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btnLayout->addWidget(insertBtn);
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btnLayout->addWidget(delBtn);
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QVBoxLayout *mainLayout = new QVBoxLayout(this);
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mainLayout->addWidget(listView);
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mainLayout->addLayout(btnLayout);
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setLayout(mainLayout);
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}
接下来我们来看几个按钮的响应槽函数。
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void MyListView::insertData()
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{
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bool isOK;
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QString text = QInputDialog::getText(this, "Insert",
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"Please input new data:",
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QLineEdit::Normal,
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"You are inserting new data.",
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&isOK); //要求用户输入数据
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if (isOK) {
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QModelIndex currIndex = listView->currentIndex();
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model->insertRows(currIndex.row(), 1);
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model->setData(currIndex, text);
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listView->edit(currIndex);//使这一行可以被编辑
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}
接下来是删除数据:
void MyListView::deleteData()
{
if (model->rowCount() > 1) {
model->removeRows(listView->currentIndex().row(), 1);
}
}
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