增加和修改了非常多的功能

src/ui/LoginWidget.h

@@ -0,0 +1,40 @@
+#ifndef LOGINWIDGET_H
+#define LOGINWIDGET_H
+
+#include <QWidget>
+
+class ElaLineEdit;
+class ElaPushButton;
+class ElaToggleSwitch;
+class QLabel;
+
+class LoginWidget : public QWidget {
+    Q_OBJECT
+public:
+    explicit LoginWidget(QWidget* parent = nullptr);
+    QString nickname() const;
+
+signals:
+    void loggedIn(const QString& nickname);
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    void initUI();
+    void onConnect();
+    void onLogin();
+    void onRegister();
+
+    ElaLineEdit* _serverEdit = nullptr;
+    ElaLineEdit* _usernameEdit = nullptr;
+    ElaLineEdit* _passwordEdit = nullptr;
+    ElaToggleSwitch* _rememberSwitch = nullptr;
+    ElaPushButton* _connectBtn = nullptr;
+    ElaPushButton* _loginBtn = nullptr;
+    ElaPushButton* _registerBtn = nullptr;
+    QLabel* _statusLabel = nullptr;
+    QString _nickname;
+};
+
+#endif