在我的 Qt 应用程序中,我想将新项目动态添加到列表视图中。此外,我还使用 Signal & Slot 在表单之间传输数据,因此我创建了以下 2 个表单:
主窗口.h
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
public slots:
void ReceivedData(QString item);
private slots:
void on_btnAdd_clicked();
void on_btnCancel_clicked();
private:
Ui::MainWindow *ui;
void SetUpListName();
};
addform.h
class AddForm : public QDialog
{
Q_OBJECT
public:
explicit AddForm(QWidget *parent = 0);
~AddForm();
signals:
void SendData(QString item);
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
private:
Ui::AddForm *ui;
MainWindow *main_window;
};
主窗口.cpp
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
SetUpListName();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::SetUpListName()
{
// Add 5 new elements
for (int i = 0; i < 5; i++) {
QString item = "Item " + QString::number(i);
ui->lwListItem->addItem(item);
}
}
void MainWindow::on_btnAdd_clicked()
{
// Open Add Form
AddForm add;
add.setModal(true);
add.exec();
}
void MainWindow::on_btnCancel_clicked()
{
this->close();
}
void MainWindow::ReceivedData(QString item)
{
// Check to receive data
qDebug() << "Item: " << item;
// Add a new item to list items
ui->lwListItem->addItem(item);
}
addform.cpp
AddForm::AddForm(QWidget *parent) :
QDialog(parent),
ui(new Ui::AddForm)
{
ui->setupUi(this);
main_window = new MainWindow();
connect(this, SIGNAL(SendData(QString)), main_window, SLOT(ReceivedData(QString)));
}
AddForm::~AddForm()
{
delete ui;
}
void AddForm::on_pushButton_clicked()
{
// Send data via Signal & Slot
emit SendData(ui->txtName->text());
}
void AddForm::on_pushButton_2_clicked()
{
this->close();
}
当我运行应用程序时,我从添加表单中获取了数据,但列表视图没有添加此项。
有人有任何解决方案吗?
谢谢!
P/S:你可以在这里下载我的源代码