Make next and prev buttons (#2598)

* Make next and prev buttons

* cleanup

* reduce diff

* Revert previous commit

* change scaling
old-commit-hash: f6ed146e8f

selfdrive/ui/qt/offroad/wifi.cc

@@ -55,6 +55,7 @@ WifiUI::WifiUI(QWidget *parent) : QWidget(parent) {
 
   // Scan on startup
   wifi->request_scan();
+  page = 0;
 }
 
 void WifiUI::refresh() {
@@ -74,6 +75,7 @@ void WifiUI::refresh() {
   for (Network &network : wifi->seen_networks){
     QHBoxLayout *hlayout = new QHBoxLayout;
 
+    if(page * networks_per_page <= i && i < (page + 1) * networks_per_page){
       // SSID
       hlayout->addSpacing(50);
       hlayout->addWidget(new QLabel(QString::fromUtf8(network.ssid)));
@@ -94,7 +96,7 @@ void WifiUI::refresh() {
       hlayout->addWidget(btn);
       hlayout->addSpacing(20);
 
-    connectButtons->addButton(btn, i++);
+      connectButtons->addButton(btn, i);
 
       QWidget * w = new QWidget;
       w->setLayout(hlayout);
@@ -113,10 +115,41 @@ void WifiUI::refresh() {
           background-color: #114265;
         }
       )");
-    if(i > 10){
-      return;
     }
+    i+=1;
   }
+  QHBoxLayout *prev_next_buttons = new QHBoxLayout;
+  QPushButton* prev = new QPushButton("Previous");
+  prev->setEnabled(page);
+  prev->setFixedHeight(100);
+
+  QPushButton* next = new QPushButton("Next");
+  next->setFixedHeight(100);
+  //If there are more visible networks then we can show, enable going to next page
+  if(wifi->seen_networks.size() > (page + 1) * networks_per_page){
+    next->setEnabled(true);
+  }else{
+    next->setDisabled(true);
+  }
+  QObject::connect(prev, SIGNAL(released()), this, SLOT(prevPage()));
+  QObject::connect(next, SIGNAL(released()), this, SLOT(nextPage()));
+  prev_next_buttons->addWidget(prev);
+  prev_next_buttons->addWidget(next);
+
+  QWidget * w = new QWidget;
+  w->setLayout(prev_next_buttons);
+  w->setStyleSheet(R"(
+    QPushButton:enabled {
+      background-color: #114265;
+    }
+    QPushButton:disabled {
+      background-color: #323C43;
+    }
+    * {
+      background-color: #114265;
+    }
+  )");
+  vlayout->addWidget(w);
 }
 
 void WifiUI::handleButton(QAbstractButton* button) {
@@ -130,7 +163,6 @@ void WifiUI::handleButton(QAbstractButton* button) {
     wifi->connect(n);
   } else if (n.security_type == SecurityType::WPA){
     QString password = getStringFromUser();
-
     if(password.size()){
       wifi->connect(n, password);
     }
@@ -150,3 +182,11 @@ void WifiUI::receiveText(QString t) {
   loop.quit();
   text = t;
 }
+void WifiUI::prevPage() {
+  page--;
+  refresh();
+}
+void WifiUI::nextPage() {
+  page++;
+  refresh();
+}

selfdrive/ui/qt/offroad/wifi.hpp

@@ -15,6 +15,8 @@ class WifiUI : public QWidget {
 
 private:
   WifiManager* wifi;
+  int page;
+  const int networks_per_page = 10;
 
   QStackedWidget* swidget;
   QVBoxLayout* vlayout;
@@ -35,4 +37,6 @@ private slots:
   void handleButton(QAbstractButton* m_button);
   void refresh();
   void receiveText(QString text);
+  void prevPage();
+  void nextPage();
 };