Complete the basic UI

toast.cpp

@@ -0,0 +1,52 @@
+#include "toast.h"
+
+Toast::Toast(const QString& text)
+{
+    // 1. 设置窗口的基本参数
+    this->setFixedSize(600, 120);
+    this->setWindowTitle("消息通知");
+    this->setWindowIcon(QIcon(":/resource/image/logo.png"));
+    this->setAttribute(Qt::WA_DeleteOnClose);
+    this->setStyleSheet("QDialog { background-color: rgb(255, 255, 255); }");
+    // 去掉窗口的标题栏
+    this->setWindowFlags(Qt::FramelessWindowHint);
+
+    // 2. 先考虑一下窗口的位置.
+    // 获取到整个屏幕的尺寸, 通过 primaryScreen 来获取.
+    QScreen* screen = QApplication::primaryScreen();
+    int width = screen->size().width();
+    int height = screen->size().height();
+    int x = (width - this->width()) / 2;
+    int y = height - this->height() - 100;	// 此处的 100 是窗口底边距离屏幕底边的间隔
+    this->move(x, y);
+
+    // 3. 添加一个布局管理器
+    QVBoxLayout* layout = new QVBoxLayout();
+    layout->setSpacing(0);
+    layout->setContentsMargins(0, 0, 0, 0);
+    this->setLayout(layout);
+
+    // 4. 创建显示文本的 Label
+    QLabel* label = new QLabel();
+    label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    label->setAlignment(Qt::AlignCenter);
+    label->setStyleSheet("QLabel { font-size: 25px; color: rgb(0, 0, 0); }");
+    label->setText(text);
+    layout->addWidget(label);
+
+    // 5. 实现 2s 之后自动关闭.
+    QTimer* timer = new QTimer(this);
+    connect(timer, &QTimer::timeout, this, [=]() {
+        timer->stop();
+        // 核心代码, 关闭当前窗口
+        this->close();
+        });
+    timer->start(2000);
+
+}
+
+void Toast::showMessage(const QString& text)
+{
+    Toast* toast = new Toast(text);
+    toast->show();
+}