Add simple ui::color_view element

libs/ui/include/psemek/ui/color_view.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <psemek/ui/element.hpp>
+#include <psemek/ui/box_shape.hpp>
+
+namespace psemek::ui
+{
+
+	struct color_view
+		: ui::element
+	{
+		virtual gfx::color_rgba color() const { return color_; }
+		virtual void set_color(gfx::color_rgba value) { color_ = value; }
+
+		virtual bool square() const { return square_; }
+		virtual void set_square(bool value) { square_ = value; }
+
+		struct shape const & shape() const override { return shape_; }
+		void reshape(geom::box<float, 2> const & box) override { shape_.box = box; }
+
+		geom::interval<float> width_constraints(float height) const override;
+		geom::interval<float> height_constraints(float width) const override;
+
+		void draw(painter & p) const override;
+
+	private:
+		box_shape shape_;
+		gfx::color_rgba color_ = {255, 0, 0, 255};
+		bool square_ = true;
+	};
+
+}

libs/ui/source/color_view.cpp

@@ -0,0 +1,35 @@
+#include <psemek/ui/color_view.hpp>
+#include <psemek/log/log.hpp>
+
+namespace psemek::ui
+{
+
+	geom::interval<float> color_view::width_constraints(float height) const
+	{
+		if (square_)
+			return {height, height};
+		return element::width_constraints(height);
+	}
+
+	geom::interval<float> color_view::height_constraints(float width) const
+	{
+		if (square_)
+			return {width, width};
+		return element::height_constraints(width);
+	}
+
+	void color_view::draw(painter & p) const
+	{
+		geom::box<float, 2> box = shape_.box;
+		if (square_)
+		{
+			if (box[0].length() > box[1].length())
+				box[0] = geom::expand(geom::interval<float>::singleton(box[0].center()), box[1].length() / 2.f);
+			else
+				box[1] = geom::expand(geom::interval<float>::singleton(box[1].center()), box[0].length() / 2.f);
+		}
+
+		p.draw_rect(box, color_);
+	}
+
+}