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#include "mainwindow.h"
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#include <QMessageBox>
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#include <QDebug>
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent)
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{
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QWidget *central = new QWidget(this);
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setCentralWidget(central);
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// 表格
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tableView = new QTableView(this);
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model = new QStandardItemModel(this);
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model->setHorizontalHeaderLabels({"学号", "姓名", "成绩"});
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tableView->setModel(model);
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// 输入框
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idEdit = new QLineEdit();
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idEdit->setPlaceholderText("学号"); // 占位符 && 水印文字
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nameEdit = new QLineEdit();
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nameEdit->setPlaceholderText("姓名");
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scoreEdit = new QLineEdit();
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scoreEdit->setPlaceholderText("成绩");
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// 按钮
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addButton = new QPushButton("添加");
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deleteButton = new QPushButton("删除");
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// 布局
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// Edit水平布局
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QHBoxLayout *formLayout_Edit = new QHBoxLayout();
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formLayout_Edit->addWidget(idEdit);
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formLayout_Edit->addWidget(nameEdit);
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formLayout_Edit->addWidget(scoreEdit); // 使各个Edit之间水平分布
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// Button水平布局
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QHBoxLayout *formLayout_button = new QHBoxLayout();
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formLayout_button->addWidget(addButton);
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formLayout_button->addWidget(deleteButton);
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// 垂直布局
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QVBoxLayout *mainLayout = new QVBoxLayout();
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mainLayout->addWidget(tableView); // index 0：垂直布局中第0个元素（表格）
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mainLayout->addLayout(formLayout_Edit); // index 1：垂直布局中第1个元素（水平排列的输入框/按钮）
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mainLayout->addLayout(formLayout_button); // index 2：垂直布局中第2个元素 （按钮）
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// 控制大小
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mainLayout->setStretch(0, 1); // 表格撑满
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mainLayout->setStretch(1, 0); // 输入区最小
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mainLayout->setContentsMargins(10, 10, 10, 10); // 让每一个控件都与边缘保持10个像素的距离
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central->setLayout(mainLayout);
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tableView->setSizePolicy(
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QSizePolicy::Expanding,
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QSizePolicy::Expanding);
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// 信号槽
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connect(addButton, &QPushButton::clicked, this, &MainWindow::on_addButton_clicked);
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connect(deleteButton, &QPushButton::clicked, this, &MainWindow::on_deleteButton_clicked);
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// 确认窗口大小
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resize(900, 600);
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setMinimumSize(800, 500);
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}
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// 这个析构还必须得有
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MainWindow::~MainWindow()
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{
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}
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void MainWindow::on_addButton_clicked()
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{
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// 添加学生信息的逻辑
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Student stu;
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stu.id = idEdit->text();
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stu.name = nameEdit->text();
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stu.score = scoreEdit->text().toDouble();
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// qDebug() << "id : " << stu.id
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// << "name : " << stu.name
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// << "score : " << stu.score;
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// 判空F
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if (stu.id.isEmpty() || stu.name.isEmpty())
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{
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QMessageBox::warning(this, "错误", "学号和姓名不能为空！");
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return;
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}
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students.push_back(stu);
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// 刷新表格
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refreshTable();
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// 刷新输入框内容
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idEdit->clear();
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nameEdit->clear();
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scoreEdit->clear();
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}
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void MainWindow::on_deleteButton_clicked()
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{
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int row = tableView->currentIndex().row();
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if (row < 0)
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return;
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students.remove(row);
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// 刷新表格
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refreshTable();
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}
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void MainWindow::refreshTable()
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{
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model->removeRows(0, model->rowCount());
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for (const Student &stu : students)
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{
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QList<QStandardItem *> row;
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row << new QStandardItem(stu.id)
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<< new QStandardItem(stu.name)
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<< new QStandardItem(QString::number(stu.score));
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model->appendRow(row);
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}
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}
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