qtreeview实现检索功能,search按钮弹出新窗口,将输入到新窗口后,点击确定,将关闭新窗口,移动光标到位置,c++
时间: 2023-08-18 20:07:07 浏览: 49
您可以在QTreeView中实现搜索功能,然后在单击搜索按钮时打开新窗口,在新窗口中输入搜索文本并单击“确定”按钮后关闭窗口,并将光标移动到匹配项的位置。以下是一个示例代码:
MainWindow.h:
```c++
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
class QTreeView;
class SearchDialog;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();
private slots:
void showSearchDialog();
private:
QTreeView *m_treeView;
SearchDialog *m_searchDialog;
};
#endif // MAINWINDOW_H
```
MainWindow.cpp:
```c++
#include "MainWindow.h"
#include "SearchDialog.h"
#include <QTreeView>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
m_treeView = new QTreeView(this);
setCentralWidget(m_treeView);
m_searchDialog = new SearchDialog(this);
connect(m_searchDialog, &SearchDialog::searchTextChanged, [=](const QString &searchText) {
QModelIndex foundIndex;
for (int i = 0; i < m_treeView->model()->rowCount(); ++i) {
QModelIndex index = m_treeView->model()->index(i, 0);
QString text = index.data(Qt::DisplayRole).toString();
if (text.contains(searchText)) {
foundIndex = index;
break;
}
}
if (foundIndex.isValid()) {
m_treeView->scrollTo(foundIndex, QAbstractItemView::PositionAtCenter);
m_treeView->setCurrentIndex(foundIndex);
}
});
}
MainWindow::~MainWindow()
{
}
void MainWindow::showSearchDialog()
{
m_searchDialog->show();
}
```
SearchDialog.h:
```c++
#ifndef SEARCHDIALOG_H
#define SEARCHDIALOG_H
#include <QDialog>
class QLineEdit;
class SearchDialog : public QDialog
{
Q_OBJECT
public:
explicit SearchDialog(QWidget *parent = nullptr);
signals:
void searchTextChanged(const QString &searchText);
private slots:
void onOkButtonClicked();
private:
QLineEdit *m_searchLineEdit;
};
#endif // SEARCHDIALOG_H
```
SearchDialog.cpp:
```c++
#include "SearchDialog.h"
#include <QLineEdit>
#include <QPushButton>
#include <QVBoxLayout>
SearchDialog::SearchDialog(QWidget *parent)
: QDialog(parent)
{
m_searchLineEdit = new QLineEdit(this);
QPushButton *okButton = new QPushButton(tr("OK"), this);
connect(okButton, &QPushButton::clicked, this, &SearchDialog::onOkButtonClicked);
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(m_searchLineEdit);
layout->addWidget(okButton);
setLayout(layout);
}
void SearchDialog::onOkButtonClicked()
{
QString searchText = m_searchLineEdit->text();
emit searchTextChanged(searchText);
close();
}
```
在MainWindow的构造函数中创建SearchDialog实例,并将其与searchTextChanged信号连接起来。然后,将showSearchDialog方法与搜索按钮的单击信号连接起来。在showSearchDialog方法中,调用SearchDialog的show方法来显示搜索对话框。在SearchDialog的构造函数中创建QLineEdit和QPushButton,并将它们添加到QVBoxLayout中,最后将其设置为对话框的布局。
当用户单击SearchDialog中的“OK”按钮时,SearchDialog将发出searchTextChanged信号,并将搜索文本作为参数传递。在MainWindow的槽函数中,用搜索文本遍历QTreeView中的每一行,并查找匹配项。一旦找到匹配项,使用QTreeView的scrollTo方法将其滚动到可见区域,并使用setCurrentIndex方法将光标移动到匹配项的位置。