Новый модуль checkbox.

source/ncui/package.d

@@ -18,3 +18,4 @@ public import ncui.lib.logger;
 // Виджеты
 public import ncui.widgets.container;
 public import ncui.widgets.button;
+public import ncui.widgets.checkbox;

source/ncui/widgets/checkbox.d

@@ -0,0 +1,97 @@
+module ncui.widgets.checkbox;
+
+import ncui.widgets.widget;
+import ncui.core.event;
+import ncui.core.window;
+import ncui.engine.screen;
+import ncui.engine.action;
+
+alias OnChange = void delegate(bool checked);
+
+final class Checkbox : IWidget
+{
+private:
+	OnChange _onChange;
+	int _y;
+	int _x;
+	string _label;
+	bool _checked;
+	bool _enabled = true;
+
+	void notifyChange()
+	{
+		if (_onChange !is null)
+		{
+			_onChange(_checked);
+		}
+	}
+
+public:
+	this(int y, int x, string label, bool checked = false, OnChange onChange = null)
+	{
+		_y = y;
+		_x = x;
+		_label = label;
+		_checked = checked;
+		_onChange = onChange;
+	}
+
+	override @property bool focusable()
+	{
+		return true;
+	}
+
+	override @property bool enabled()
+	{
+		return _enabled;
+	}
+
+	void setChecked(bool checked)
+	{
+		if (_checked == checked)
+		{
+			return;
+		}
+
+		_checked = checked;
+		notifyChange();
+	}
+
+	void toggle()
+	{
+		setChecked(!_checked);
+	}
+
+	void setEnabled(bool enabled)
+	{
+		_enabled = enabled;
+	}
+
+	void onChange(OnChange callback)
+	{
+		_onChange = callback;
+	}
+
+	override void render(Window window, ScreenContext context, bool focused)
+	{
+		const string mark = _checked ? "x" : " ";
+		string checkbox = (focused ? "*" : "[") ~ mark ~ (focused ? "* " : "] ") ~ _label;
+		window.put(_y, _x, checkbox);
+	}
+
+	override ScreenAction handle(ScreenContext context, KeyEvent event)
+	{
+		if (!_enabled)
+		{
+			return ScreenAction.none();
+		}
+
+		if (isEnter(event) || isSpace(event))
+		{
+			toggle();
+			return ScreenAction.none();
+		}
+
+		return ScreenAction.none();
+	}
+}