彻底改版2.0

other/lineeditnext/widget.cpp

@@ -0,0 +1,30 @@
+#include "widget.h"
+#include "ui_widget.h"
+#include "qlineedit.h"
+
+Widget::Widget(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::Widget)
+{
+    ui->setupUi(this);
+    connect(ui->lineEdit1, SIGNAL(returnPressed()), this, SLOT(next()));
+    connect(ui->lineEdit2, SIGNAL(returnPressed()), this, SLOT(next()));
+    connect(ui->lineEdit3, SIGNAL(returnPressed()), this, SLOT(next()));
+}
+
+Widget::~Widget()
+{
+    delete ui;
+}
+
+void Widget::next()
+{
+    QLineEdit *lineEdit = (QLineEdit *)sender();
+    if (lineEdit == ui->lineEdit1) {
+        ui->lineEdit2->setFocus();
+    } else if (lineEdit == ui->lineEdit2) {
+        ui->lineEdit3->setFocus();
+    } else if (lineEdit == ui->lineEdit3) {
+        ui->lineEdit1->setFocus();
+    }
+}