add popover component

src/components/popover.cpp

@@ -0,0 +1,35 @@
+#include "components/popover.hpp"
+
+#include "gtkmm/label.h"
+#include "gtkmm/object.h"
+
+Popover::Popover(std::string icon, std::string name) {
+    auto label = Gtk::make_managed<Gtk::Label>(icon);
+    label->add_css_class("icon-label");
+    set_child(*label);
+    signal_clicked().connect(
+        sigc::mem_fun(*this, &Popover::on_toggle_window));
+
+    popover = new Gtk::Popover();
+    popover->set_parent(*this);
+    popover->set_autohide(true);
+
+    popover->signal_closed().connect([this]() {
+        this->add_css_class("minimized");
+        this->remove_css_class("restored");
+    });
+}
+
+Popover::~Popover() {
+    delete popover;
+}
+
+void Popover::on_toggle_window() {
+    if (popover->get_visible()) {
+        popover->popdown();
+    } else {
+        this->remove_css_class("minimized");
+        this->add_css_class("restored");
+        popover->popup();
+    }
+}