Refactor ui::edit state & support focusing

libs/ui/include/psemek/ui/edit.hpp

@@ -57,6 +57,9 @@ namespace psemek::ui
 		bool on_event(key_press const & e) override;
 		bool on_event(text_input const & e) override;
 
+		bool focused() const override;
+		virtual bool editing() const;
+
 		struct shape const & shape() const override { return shape_; }
 		void reshape(geom::box<float, 2> const & bbox) override;
 
@@ -70,15 +73,6 @@ namespace psemek::ui
 
 	protected:
 
-		enum class state_t
-		{
-			normal,
-			mouseover,
-			editing,
-		};
-
-		state_t state() const { return state_; }
-
 		void set_text_shape(geom::box<float, 2> const & box);
 
 	private:
@@ -87,6 +81,9 @@ namespace psemek::ui
 		halignment halign_ = halignment::left;
 		valignment valign_ = valignment::top;
 
+		bool editing_ = false;
+		bool mouseover_ = false;
+
 		std::size_t caret_ = 0;
 		float caret_blink_period_ = 0.5f;
 		float caret_blink_timer_ = 0.f;
@@ -95,8 +92,6 @@ namespace psemek::ui
 		box_shape shape_;
 		geom::box<float, 2> text_box_;
 
-		state_t state_ = state_t::normal;
-
 		validator_type validator_;
 
 		callback_type on_text_entered_;

libs/ui/source/edit.cpp

@@ -90,32 +90,13 @@ namespace psemek::ui
 
 	bool edit::on_event(mouse_move const & e)
 	{
-		bool const mouseover = shape_.contains(geom::cast<float>(e.position));
-
-		switch (state_)
-		{
-		case state_t::normal:
-			if (mouseover)
-			{
-				state_ = state_t::mouseover;
-				sdl2::set_cursor(sdl2::cursor_type::beam);
-			}
-			break;
-		case state_t::mouseover:
-			if (!mouseover)
-			{
-				state_ = state_t::normal;
-				sdl2::set_cursor(sdl2::cursor_type::arrow);
-			}
-			break;
-		case state_t::editing:
-			if (mouseover)
-				sdl2::set_cursor(sdl2::cursor_type::beam);
-			else
-				sdl2::set_cursor(sdl2::cursor_type::arrow);
-			break;
-		}
+		bool new_mouseover = shape_.contains(geom::cast<float>(e.position));
+		if (!mouseover_ && new_mouseover)
+			sdl2::set_cursor(sdl2::cursor_type::beam);
+		else if (mouseover_ && !new_mouseover)
+			sdl2::set_cursor(sdl2::cursor_type::arrow);
 
+		mouseover_ = new_mouseover;
 		return false;
 	}
 
@@ -123,22 +104,25 @@ namespace psemek::ui
 	{
 		if (e.button == mouse_button::left && e.down)
 		{
-			switch (state_)
+			if (mouseover_)
 			{
-			case state_t::normal:
-				return false;
-			case state_t::mouseover:
-				state_ = state_t::editing;
-				if (!in_text_input())
+				if (!editing_)
+				{
+					editing_ = true;
 					start_text_input();
-				reset_caret();
+					reset_caret();
+				}
 				return true;
-			case state_t::editing:
-				state_ = state_t::normal;
-				if (in_text_input())
+			}
+			else
+			{
+				if (editing_)
+				{
+					editing_ = false;
 					stop_text_input();
-				reset_caret();
-				return true;
+					reset_caret();
+					post_text_entered();
+				}
 			}
 		}
 
@@ -147,7 +131,7 @@ namespace psemek::ui
 
 	bool edit::on_event(key_press const & e)
 	{
-		if (e.down && state_ == state_t::editing)
+		if (e.down && editing_)
 		{
 			if (e.key == SDLK_LEFT)
 			{
@@ -175,11 +159,13 @@ namespace psemek::ui
 			}
 			else if (e.key == SDLK_RETURN || e.key == SDLK_ESCAPE)
 			{
-				state_ = state_t::normal;
-				if (in_text_input())
+				if (editing_)
+				{
+					editing_ = false;
 					stop_text_input();
-				reset_caret();
-				post_text_entered();
+					reset_caret();
+					post_text_entered();
+				}
 			}
 			else if (e.key == SDLK_BACKSPACE)
 			{
@@ -210,7 +196,7 @@ namespace psemek::ui
 
 	bool edit::on_event(text_input const & e)
 	{
-		if (state_ == state_t::editing)
+		if (editing_)
 		{
 			auto new_text = text_;
 			auto range = util::utf8_range(e.text);
@@ -223,6 +209,16 @@ namespace psemek::ui
 		return false;
 	}
 
+	bool edit::focused() const
+	{
+		return editing_;
+	}
+
+	bool edit::editing() const
+	{
+		return editing_;
+	}
+
 	void edit::reshape(geom::box<float, 2> const & bbox)
 	{
 		shape_.box = bbox;
@@ -235,7 +231,6 @@ namespace psemek::ui
 		static float const inf = std::numeric_limits<float>::infinity();
 
 		auto st = merged_own_style();
-
 		return {{{0.f, inf}, {1.f * st->font->size()[1] * (*st->scale), inf}}};
 	}
 
@@ -247,7 +242,7 @@ namespace psemek::ui
 
 	void edit::update(float dt)
 	{
-		if (state_ == state_t::editing)
+		if (editing_)
 		{
 			caret_blink_timer_ += dt;
 			if (caret_blink_timer_ >= caret_blink_period_)
@@ -359,7 +354,7 @@ namespace psemek::ui
 
 	void edit::reset_caret()
 	{
-		caret_visible_ = (state_ == state_t::editing);
+		caret_visible_ = editing_;
 		caret_blink_timer_ = 0.f;
 	}