added colon emote popup for ffz and bttv

src/widgets/listview/GenericListItem.hpp

@@ -0,0 +1,44 @@
+#pragma once
+
+namespace chatterino {
+
+class GenericListItem
+{
+public:
+    /**
+     * @brief   Attempt to obtain an GenericListItem * from the passed QVariant.
+     *
+     * @param   variant variant to try to convert to GenericListItem *
+     *
+     * @return  an GenericListItem * if the QVariant could be converted,
+     *          or nullptr if the variant did not contain GenericListItem *
+     */
+    static GenericListItem *fromVariant(const QVariant &variant);
+
+    virtual ~GenericListItem() = default;
+
+    GenericListItem();
+
+    /**
+     * @param   icon    icon to be displayed in the switcher list
+     */
+    GenericListItem(const QIcon &icon);
+
+    /**
+     * @brief   Action to perform when this item is activated. Must be implemented in
+     *          subclasses.
+     */
+    virtual void action() = 0;
+
+    virtual void paint(QPainter *painter, const QRect &rect) const = 0;
+    virtual QSize sizeHint(const QRect &rect) const = 0;
+
+protected:
+    QIcon icon_;
+    static const QSize ICON_SIZE;
+};
+
+}  // namespace chatterino
+
+// This allows us to store GenericListItem * as a QVariant
+Q_DECLARE_METATYPE(chatterino::GenericListItem *);