Introduce ui::toggle_button - a button that can be turned on/off

libs/ui/include/psemek/ui/element_factory.hpp

@@ -10,6 +10,7 @@
 #include <psemek/ui/image_view.hpp>
 #include <psemek/ui/rich_image_view.hpp>
 #include <psemek/ui/checkbox.hpp>
+#include <psemek/ui/toggle_button.hpp>
 #include <psemek/ui/slider.hpp>
 #include <psemek/ui/spinbox.hpp>
 #include <psemek/ui/scroller.hpp>
@@ -32,6 +33,9 @@ namespace psemek::ui
 		virtual std::shared_ptr<image_view> make_image_view(gfx::texture_view_2d image);
 		virtual std::shared_ptr<rich_image_view> make_rich_image_view(std::shared_ptr<gfx::texture_2d> image);
 		virtual std::shared_ptr<checkbox> make_checkbox(bool value);
+		virtual std::shared_ptr<toggle_button> make_toggle_button();
+		virtual std::shared_ptr<toggle_button> make_toggle_button(std::string text);
+		virtual std::shared_ptr<toggle_button> make_toggle_button(gfx::texture_view_2d icon);
 		virtual std::shared_ptr<slider> make_slider();
 		virtual std::shared_ptr<spinbox> make_spinbox();
 		// directions:

libs/ui/include/psemek/ui/toggle_button.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <psemek/ui/checkbox.hpp>
+#include <psemek/ui/label.hpp>
+#include <psemek/ui/image_view.hpp>
+
+namespace psemek::ui
+{
+
+	struct toggle_button
+		: checkbox
+	{
+		struct label * label() { return label_.get(); }
+		struct label const * label() const { return label_.get(); }
+
+		struct image_view * icon() { return icon_.get(); }
+		struct image_view const * icon() const { return icon_.get(); }
+
+		virtual void set_label(std::shared_ptr<struct label> label);
+		virtual void set_icon(std::shared_ptr<image_view> icon);
+
+		children_range children() const override;
+
+		~toggle_button() override;
+
+	private:
+		std::shared_ptr<struct label> label_;
+		std::shared_ptr<image_view> icon_;
+		element * children_[1]{nullptr};
+	};
+
+
+}

libs/ui/source/element_factory.cpp

@@ -76,6 +76,41 @@ namespace psemek::ui
 		return nullptr;
 	}
 
+	std::shared_ptr<toggle_button> element_factory::make_toggle_button() { return nullptr; }
+
+	std::shared_ptr<toggle_button> element_factory::make_toggle_button(std::string text)
+	{
+		auto b = make_toggle_button();
+		if (b)
+		{
+			auto l = make_label(std::move(text));
+			if (l)
+			{
+				l->set_valign(label::valignment::center);
+				l->set_halign(label::halignment::center);
+				l->set_overflow(label::overflow_mode::ellipsis);
+				b->set_label(l);
+			}
+		}
+		return b;
+	}
+
+	std::shared_ptr<toggle_button> element_factory::make_toggle_button(gfx::texture_view_2d icon)
+	{
+		auto b = make_toggle_button();
+		if (b)
+		{
+			auto i = make_image_view(icon);
+			if (i)
+			{
+				i->set_downscale(false);
+				i->set_upscale(false);
+				b->set_icon(i);
+			}
+		}
+		return b;
+	}
+
 	std::shared_ptr<slider> element_factory::make_slider() { return nullptr; }
 
 	std::shared_ptr<spinbox> element_factory::make_spinbox() { return nullptr; }

libs/ui/source/toggle_button.cpp

@@ -0,0 +1,44 @@
+#include <psemek/ui/toggle_button.hpp>
+
+namespace psemek::ui
+{
+
+	element::children_range toggle_button::children() const
+	{
+		return children_range{children_};
+	}
+
+	toggle_button::~toggle_button()
+	{
+		release_children();
+	}
+
+	void toggle_button::set_label(std::shared_ptr<struct label> label)
+	{
+		if (icon())
+			set_icon(nullptr);
+
+		if (label_) label_->set_parent(nullptr);
+
+		label_ = std::move(label);
+		children_[0] = label_.get();
+		if (label_) label_->set_parent(this);
+	}
+
+	void toggle_button::set_icon(std::shared_ptr<image_view> icon)
+	{
+		if (label())
+			set_label(nullptr);
+
+		if (icon_) icon_->set_parent(nullptr);
+
+		icon_ = std::move(icon);
+		children_[0] = icon_.get();
+		if (icon_)
+		{
+			icon_->set_parent(this);
+			icon_->set_downscale(false);
+		}
+	}
+
+}