Open window at center

GPClient/gpclient.cpp

@@ -2,12 +2,17 @@
 #include "ui_gpclient.h"
 #include "samlloginwindow.h"
 
+#include <QDesktopWidget>
+
 GPClient::GPClient(QWidget *parent)
     : QMainWindow(parent)
     , ui(new Ui::GPClient)
 {
     ui->setupUi(this);
 
+    setFixedSize(width(), height());
+    moveCenter();
+
     QObject::connect(this, &GPClient::connectFailed, [this]() {
         ui->connectButton->setDisabled(false);
         ui->connectButton->setText("Connect");
@@ -136,6 +141,7 @@ void GPClient::onLoginSuccess(QJsonObject loginResult)
 
     ui->statusLabel->setText("Connecting...");
     ui->connectButton->setText("Cancel");
+    ui->connectButton->setDisabled(false);
     vpn->connect(host, user, cookieValue);
 }
 
@@ -158,6 +164,28 @@ void GPClient::onVPNLogAvailable(QString log)
     qDebug() << log;
 }
 
+void GPClient::moveCenter()
+{
+    QDesktopWidget *desktop = QApplication::desktop();
+
+    int screenWidth, width;
+    int screenHeight, height;
+    int x, y;
+    QSize windowSize;
+
+    screenWidth = desktop->width();
+    screenHeight = desktop->height();
+
+    windowSize = size();
+    width = windowSize.width();
+    height = windowSize.height();
+
+    x = (screenWidth - width) / 2;
+    y = (screenHeight - height) / 2;
+    y -= 50;
+    move(x, y);
+}
+
 void GPClient::samlLogin(const QString portal)
 {
     const QString preloginUrl = "https://" + portal + "/ssl-vpn/prelogin.esp";

GPClient/gpclient.h

@@ -39,6 +39,7 @@ private:
     QNetworkReply *reply;
     com::yuezk::qt::GPService *vpn;
 
+    void moveCenter();
     void samlLogin(const QString portal);
 };
 #endif // GPCLIENT_H

GPClient/gpclient.ui

@@ -6,12 +6,12 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>258</width>
-    <height>301</height>
+    <width>260</width>
+    <height>300</height>
    </rect>
   </property>
   <property name="windowTitle">
-   <string>GPClient</string>
+   <string>GP VPN Client</string>
   </property>
   <widget class="QWidget" name="centralwidget">
    <property name="sizePolicy">