Scroll in selected split with PageUp and PageDown (#2081)

src/widgets/settingspages/KeyboardSettingsPage.cpp

@@ -66,6 +66,10 @@ KeyboardSettingsPage::KeyboardSettingsPage()
     form->addRow(new QLabel("Ctrl + P"), new QLabel("Open Settings menu"));
     form->addRow(new QLabel("F5"),
                  new QLabel("Reload subscriber and channel emotes"));
+
+    form->addItem(new QSpacerItem(16, 16));
+    form->addRow(new QLabel("PageUp"), new QLabel("Scroll up"));
+    form->addRow(new QLabel("PageDown"), new QLabel("Scroll down"));
 }
 
 }  // namespace chatterino

src/widgets/splits/SplitInput.cpp

@@ -450,6 +450,20 @@ void SplitInput::installKeyPressedEvent()
         {
             this->openEmotePopup();
         }
+        else if (event->key() == Qt::Key_PageUp)
+        {
+            auto &scrollbar = this->split_->getChannelView().getScrollBar();
+            scrollbar.offset(-scrollbar.getLargeChange());
+
+            event->accept();
+        }
+        else if (event->key() == Qt::Key_PageDown)
+        {
+            auto &scrollbar = this->split_->getChannelView().getScrollBar();
+            scrollbar.offset(scrollbar.getLargeChange());
+
+            event->accept();
+        }
     });
 }