QListWidget是继承QListView,QListView是基于Model的,需要自己来建模(如建立QStringListModel,QSqlTableModel等),保存数据,这样就大大降低了数据冗余,提高了程序的效率,但是需要我们对数据建模有一定的了解,而QListWidget是一个升级版本的QListView,它已经为我们建立了一个数据存储模型QListWidgetItem,操作方便,直接调用...
QListView *listView = new QListView; listView->setModel(model); listView->setEditTriggers(QAbstractItemView::DoubleClicked); // 双击编辑 1. 2. 3. 4. 5. 6. 7. 8. QListView将一维线性数据以列表视图的形式显示,可以使用任何数据模型作为数据源。 ### 2、QTreeView: 层级树形视图 QStandardItemMo...
// ui->treeView->expandAll(); 3.单纯显示意义不大,我们需要可以点击选择,双击打开,自然而然就想到信号槽了 connect(ui->treeView,SIGNAL(clicked(QModelIndex)),this,SLOT(onClicked(QModelIndex))); connect(ui>treeView,SIGNAL(doubleClicked(QModelIndex)),this,SLOT(onDoubleClicked(QModelIndex))); void T...
此外,对于某些特定的控件(如QTreeView、QListView等),Qt还提供了信号如doubleClicked,可以直接连接这些信号到槽函数来处理双击事件。 Qt代码示例:实现双击事件的处理 以下是一个简单的Qt代码示例,演示如何在QWidget中处理双击事件: cpp #include <QApplication> #include <QWidget> #include <Q...
高级控件提供了更高级的功能,如QComboBox、QTreeView等。它们通常具有更复杂的内部结构和行为。 3. 事件处理机制 QTWidgets模块的事件处理机制允许我们为控件编写事件处理函数,以便在事件发生时进行相应的处理。事件处理机制的核心是QEvent类和事件循环。 3.1 QEvent类 QEvent类是所有事件的基类。QTWidgets模块中定义了...
这篇帮助很大:https://blog.csdn.net/qq_32116695/article/details/81298585, 代码如下:TreeView{ id: viewTree anchors.fill: parent ...
QPushButton* button =newQPushButton("Click me", centralWidget); layout->addWidget(button); setCentralWidget(centralWidget); } // 所有子对象会在MainWindow销毁时自动删除 }; 3.2 混合使用智能指针和对象树 classDataManager:publicQObject { Q_OBJECT ...
Returns true if the item referred to by the given index is hidden in the view, otherwise returns false.Hiding is a view specific feature. For example in TableView a column can be marked as hidden or a row in the TreeView.In the base class this is a pure virtual function....
Returns true if the item referred to by the given index is hidden in the view, otherwise returns false.Hiding is a view specific feature. For example in TableView a column can be marked as hidden or a row in the TreeView.In the base class this is a pure virtual function....
Graphics View uses a BSP (Binary Space Partitioning) tree to provide very fast item discovery, and as a result of this, it can visualize large scenes in real-time, even with millions of items. Graphics View was introduced in Qt 4.2, replacing its predecessor, QCanvas. ...