2 files changed, 51 insertions, 1 deletions

diff --git a/ui.cpp b/ui.cpp
index e20a18c..1e18fc0 100644
--- a/ui.cpp
+++ b/ui.cpp
@@ -895,6 +895,46 @@ void UI::Button::on_render() {
 	);
 }
 
+UI::Checkbox::Checkbox(
+	UI* ui,
+	Element* parent,
+	const char* text
+): Element(ui, parent) {
+	btn = ui->create_element<Button>(this, " ");
+	btn->handler = [](UI::Element* e, const Message& m) {
+		if (m.type == UI::Message::Type::click) {
+			UI::Checkbox* ch = (UI::Checkbox*)e->parent;
+			ch->set_val(!ch->val);
+		}
+		return 0;
+	};
+	label = ui->create_element<Label>(this, text);
+	val = false;
+}
+
+UI::Rect UI::Checkbox::layout(const Rect& avail) {
+	int w;
+	Rect r = avail;
+	Rect br = btn->layout(avail);
+	w = br.w + ui_padding;
+	r.x += w;
+	r.w -= w;
+	r.clip(avail);
+	label->layout(r);
+	bound = Rect(br.x, br.y, br.w + ui_padding * 2, br.h);
+	clip = bound;
+	clip.clip(ui->area);
+	return bound;
+}
+
+void UI::Checkbox::set_val(bool v) {
+	Message msg{};
+	btn->set_text(v? "x": " ");
+	val = v;
+	msg.type = Message::Type::checkbox_changed;
+	message(msg);
+}
+
 UI::Input::Input(UI* ui, Element* parent, Input_Filter f):
 	Element(ui, parent),
 	filter(f),
diff --git a/ui.hpp b/ui.hpp
index 576f7a0..dbf6fb6 100644
--- a/ui.hpp
+++ b/ui.hpp
@@ -117,7 +117,8 @@ struct UI {
 			input_changed,
 			input_finalised,
 			text_typed,
-			text_backspaced
+			text_backspaced,
+			checkbox_changed
 		} type;
 		void* payload;
 	};
@@ -201,6 +202,15 @@ struct UI {
 		void on_render() override;
 	};
 
+	struct Checkbox : Element {
+		Label* label;
+		Button* btn;
+		bool val;
+		Checkbox(UI* ui, Element* parent, const char* text);
+		Rect layout(const Rect& avail) override;
+		void set_val(bool v);
+	};
+
 	typedef int (*Input_Filter)(char ch);
 
 	struct Input : Element {