added the update download button for linux/mac (updates don't work tho

so it doesn't show)

src/util/InitUpdateButton.cpp

@@ -12,6 +12,8 @@ void initUpdateButton(RippleEffectButton &button, std::unique_ptr<UpdatePromptDi
 
     // show update prompt when clicking the button
     QObject::connect(&button, &RippleEffectButton::clicked, [&button, &handle] {
+        (void)(handle);
+
         auto dialog = new UpdatePromptDialog();
         dialog->setActionOnFocusLoss(BaseWindow::Delete);
         dialog->move(button.mapToGlobal(QPoint(int(-100 * button.getScale()), button.height())));
@@ -26,8 +28,10 @@ void initUpdateButton(RippleEffectButton &button, std::unique_ptr<UpdatePromptDi
             }
         });
 
+#ifdef Q_OS_WIN
         handle.reset(dialog);
         dialog->closing.connect([&handle] { handle.release(); });
+#endif
     });
 
     // update image when state changes

src/widgets/Notebook.cpp

@@ -304,8 +304,6 @@ void Notebook::resizeEvent(QResizeEvent *)
 
 void Notebook::performLayout(bool animated)
 {
-    auto app = getApp();
-
     int xStart = int(2 * this->getScale());
 
     int x = xStart, y = 0;
@@ -409,8 +407,6 @@ NotebookTab *Notebook::getTabFromPage(QWidget *page)
 SplitNotebook::SplitNotebook(Window *parent)
     : Notebook(parent)
 {
-    auto app = getApp();
-
     this->connect(this->getAddButton(), &NotebookButton::clicked,
                   [this]() { QTimer::singleShot(80, this, [this] { this->addPage(true); }); });
 
@@ -429,13 +425,10 @@ void SplitNotebook::addCustomButtons()
     settingsBtn->setVisible(!getApp()->settings->hidePreferencesButton.getValue());
 
     getApp()->settings->hidePreferencesButton.connect(
-        [this, settingsBtn](bool hide, auto) {
-            settingsBtn->setVisible(!hide);
-            this->performLayout(true);
-        },
+        [settingsBtn](bool hide, auto) { settingsBtn->setVisible(!hide); },
         this->uniqueConnections);
 
-    settingsBtn->icon = NotebookButton::IconSettings;
+    settingsBtn->setIcon(NotebookButton::Settings);
 
     QObject::connect(settingsBtn, &NotebookButton::clicked,
                      [] { getApp()->windows->showSettingsDialog(); });
@@ -444,13 +437,9 @@ void SplitNotebook::addCustomButtons()
     auto userBtn = this->addCustomButton();
     userBtn->setVisible(!getApp()->settings->hideUserButton.getValue());
     getApp()->settings->hideUserButton.connect(
-        [this, userBtn](bool hide, auto) {
-            userBtn->setVisible(!hide);
-            this->performLayout(true);
-        },
-        this->uniqueConnections);
+        [userBtn](bool hide, auto) { userBtn->setVisible(!hide); }, this->uniqueConnections);
 
-    userBtn->icon = NotebookButton::IconUser;
+    userBtn->setIcon(NotebookButton::User);
     QObject::connect(userBtn, &NotebookButton::clicked, [this, userBtn] {
         getApp()->windows->showAccountSelectPopup(this->mapToGlobal(userBtn->rect().bottomRight()));
     });

src/widgets/helper/NotebookButton.cpp

@@ -13,18 +13,31 @@
 
 namespace chatterino {
 
-NotebookButton::NotebookButton(BaseWidget *parent)
+NotebookButton::NotebookButton(Notebook *parent)
     : RippleEffectButton(parent)
+    , parent_(parent)
 {
     this->setAcceptDrops(true);
 }
 
+void NotebookButton::setIcon(Icon icon)
+{
+    this->icon_ = icon;
+
+    this->update();
+}
+
+NotebookButton::Icon NotebookButton::getIcon() const
+{
+    return this->icon_;
+}
+
 void NotebookButton::themeRefreshEvent()
 {
     this->setMouseEffectColor(this->themeManager->tabs.regular.text);
 }
 
-void NotebookButton::paintEvent(QPaintEvent *)
+void NotebookButton::paintEvent(QPaintEvent *event)
 {
     QPainter painter(this);
 
@@ -43,7 +56,8 @@ void NotebookButton::paintEvent(QPaintEvent *)
 
     float h = height(), w = width();
 
-    if (icon == IconPlus) {
+    switch (icon_) {
+        case Plus: {
             painter.setPen([&] {
                 QColor tmp = foreground;
                 if (!this->mouseOver_) {
@@ -54,11 +68,15 @@ void NotebookButton::paintEvent(QPaintEvent *)
             QRect rect = this->rect();
             int s = h * 4 / 9;
 
-        painter.drawLine(rect.left() + rect.width() / 2 - (s / 2), rect.top() + rect.height() / 2,
+            painter.drawLine(
+                rect.left() + rect.width() / 2 - (s / 2), rect.top() + rect.height() / 2,
                 rect.left() + rect.width() / 2 + (s / 2), rect.top() + rect.height() / 2);
-        painter.drawLine(rect.left() + rect.width() / 2, rect.top() + rect.height() / 2 - (s / 2),
+            painter.drawLine(
+                rect.left() + rect.width() / 2, rect.top() + rect.height() / 2 - (s / 2),
                 rect.left() + rect.width() / 2, rect.top() + rect.height() / 2 + (s / 2));
-    } else if (icon == IconUser) {
+        } break;
+
+        case User: {
             painter.setRenderHint(QPainter::Antialiasing);
             painter.setRenderHint(QPainter::HighQualityAntialiasing);
 
@@ -75,8 +93,9 @@ void NotebookButton::paintEvent(QPaintEvent *)
 
             painter.setBrush(foreground);
             painter.drawEllipse(2.5 * a, 1.5 * a, 3 * a + 1, 3 * a);
-    } else  // IconSettings
-    {
+        } break;
+
+        case Settings: {
             painter.setRenderHint(QPainter::Antialiasing);
             painter.setRenderHint(QPainter::HighQualityAntialiasing);
 
@@ -87,16 +106,20 @@ void NotebookButton::paintEvent(QPaintEvent *)
 
             for (int i = 0; i < 8; i++) {
                 path.arcTo(a, a, 6 * a, 6 * a, i * (360 / 8.0) - (360 / 32.0), (360 / 32.0));
-            path.arcTo(2 * a, 2 * a, 4 * a, 4 * a, i * (360 / 8.0) + (360 / 32.0), (360 / 32.0));
+                path.arcTo(2 * a, 2 * a, 4 * a, 4 * a, i * (360 / 8.0) + (360 / 32.0),
+                           (360 / 32.0));
             }
 
             painter.fillPath(path, foreground);
 
             painter.setBrush(background);
             painter.drawEllipse(3 * a, 3 * a, 2 * a, 2 * a);
+        } break;
+
+        default:;
     }
 
-    fancyPaint(painter);
+    RippleEffectButton::paintEvent(event);
 }
 
 void NotebookButton::mouseReleaseEvent(QMouseEvent *event)
@@ -157,4 +180,14 @@ void NotebookButton::dropEvent(QDropEvent *event)
     }
 }
 
+void NotebookButton::hideEvent(QHideEvent *)
+{
+    this->parent_->performLayout();
+}
+
+void NotebookButton::showEvent(QShowEvent *)
+{
+    this->parent_->performLayout();
+}
+
 }  // namespace chatterino

src/widgets/helper/NotebookButton.hpp

@@ -6,18 +6,19 @@
 
 namespace chatterino {
 
+class Notebook;
+
 class NotebookButton : public RippleEffectButton
 {
     Q_OBJECT
 
 public:
-    static const int IconPlus = 0;
-    static const int IconUser = 1;
-    static const int IconSettings = 2;
+    enum Icon { None, Plus, User, Settings };
 
-    int icon = 0;
+    explicit NotebookButton(Notebook *parent);
 
-    NotebookButton(BaseWidget *parent);
+    void setIcon(Icon icon_);
+    Icon getIcon() const;
 
 protected:
     virtual void themeRefreshEvent() override;
@@ -27,11 +28,16 @@ protected:
     virtual void dragLeaveEvent(QDragLeaveEvent *) override;
     virtual void dropEvent(QDropEvent *) override;
 
+    virtual void hideEvent(QHideEvent *) override;
+    virtual void showEvent(QShowEvent *) override;
+
 signals:
     void clicked();
 
 private:
+    Notebook *parent_ = nullptr;
     QPoint mousePos_;
+    Icon icon_ = None;
 };
 
 }  // namespace chatterino