diff --git a/code/uilib/uicheckbox.cpp b/code/uilib/uicheckbox.cpp
index ab2e34663..be875d6e6 100644
--- a/code/uilib/uicheckbox.cpp
+++ b/code/uilib/uicheckbox.cpp
@@ -22,129 +22,195 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 #include "ui_local.h"
 
+Event EV_UICheckBox_SetCheckedCommand
+(
+	"checked_command",
+	EV_DEFAULT,
+	"s",
+	"command",
+	"Command to execute when checkbox is checked"
+);
+
+Event EV_UICheckBox_SetUncheckedCommand
+(
+	"unchecked_command",
+	EV_DEFAULT,
+	"s",
+	"command",
+	"Command to execute when checkbox is unchecked" // text not present in original executable
+);
+
+Event EV_UICheckBox_SetCheckedShader
+(
+	"checked_shader",
+	EV_DEFAULT,
+	"s",
+	"shader",
+	"Set the shader of the small button when it is checked"
+);
+
+Event EV_UICheckBox_SetUncheckedShader
+(
+	"unchecked_shader",
+	EV_DEFAULT,
+	"s",
+	"shader",
+	"Set the shader of the small button when it is unchecked"
+);
+
 CLASS_DECLARATION( UIWidget, UICheckBox, NULL )
 {
-	{ NULL, NULL }
+	{&W_LeftMouseDown,						&UICheckBox::Pressed			},
+	{&W_LeftMouseUp,						&UICheckBox::Released			},
+	{&W_MouseEntered,						&UICheckBox::MouseEntered		},
+	{&W_MouseExited,						&UICheckBox::MouseExited		},
+	{&EV_UICheckBox_SetCheckedCommand,		&UICheckBox::SetCheckedCommand	},
+	{&EV_UICheckBox_SetUncheckedCommand,	&UICheckBox::SetUncheckedCommand},
+	{&EV_UICheckBox_SetCheckedShader,		&UICheckBox::SetCheckedShader	},
+	{&EV_UICheckBox_SetUncheckedShader,		&UICheckBox::SetUncheckedShader	},
+	{NULL,									NULL							}
 };
 
 UICheckBox::UICheckBox()
 {
-	// FIXME: stub
+	AllowActivate(qtrue);
+	m_check_height = 14.0;
+	m_check_width = 14.0;
+	m_indent = 8.0;
+	m_depressed = qfalse;
+	m_checked_material = NULL;
+	m_unchecked_material = NULL;
 }
 
-void UICheckBox::Draw
-	(
-	void
-	)
-
+void UICheckBox::Draw()
 {
-	// FIXME: stub
+	if (!m_depressed)
+	{
+		Draw3DBox(0.0f, 0.0f, m_frame.size.width, m_frame.size.height, 0, m_border_color, m_local_alpha);
+	}
+
+	SetColor(m_foreground_color, m_local_alpha);
+
+	UColor color = m_checked ? UBlue : UBlack;
+	UIReggedMaterial* material = m_checked ? m_checked_material : m_unchecked_material;
+
+	float width = m_check_width * m_vVirtualScale[0];
+	float height = m_check_height * m_vVirtualScale[1];
+	float x = m_vVirtualScale[0] * m_indent;
+	float y = (m_frame.size.height - height) * 0.5f;
+	if (material)
+	{
+		material->ReregisterMaterial();
+		uii.Rend_DrawPicStretched(x, y, width, height, 0.0f, 0.0f, 1.0f, 1.0f, material->GetMaterial());
+	}
+	else
+	{
+		DrawBox(x, y, width, height, color, m_local_alpha);
+	}
+
+	float titleX = m_indent * 1.5f + m_check_width;
+	float titleY = (m_frame.size.height / m_vVirtualScale[1] - getTitleHeight()) * 0.5f - 1.0f;
+	return DrawTitle(titleX, titleY);
 }
 
-void UICheckBox::CharEvent
-	(
-	int ch
-	)
-
+void UICheckBox::CharEvent(int ch)
 {
-	// FIXME: stub
+	// Support ticking checkboxes with spacebar
+	if (ch == ' ')
+	{
+		m_checked = !m_checked;
+		UpdateCvar();
+	}
 }
 
-void UICheckBox::Pressed
-	(
-	Event *ev
-	)
-
+void UICheckBox::Pressed(Event *ev)
 {
-	// FIXME: stub
+	m_depressed = qtrue;
 }
 
-void UICheckBox::Released
-	(
-	Event *ev
-	)
-
+void UICheckBox::Released(Event *ev)
 {
-	// FIXME: stub
+	m_checked = !m_checked;
+
+	// Handle additional commands:
+	// this is for checkboxes that either change multiple cvars,
+	// or that set a cvar with a non-bool value.
+	// e.g.: the Invert Mouse checkbox originally flips cvar m_invert_pitch,
+	// but also does ("set m_pitch -0.022" : "set m_pitch 0.022") commands using this
+	str command = m_checked ? m_checked_command : m_unchecked_command;
+	Cbuf_AddText(command.c_str());
+
+	m_depressed = qfalse;
+	UpdateCvar();
 }
 
-void UICheckBox::UpdateCvar
-	(
-	void
-	)
+void UICheckBox::UpdateCvar()
 {
-	// FIXME: stub
+	if (m_cvarname.length())
+	{
+		UI_SetCvarInt(m_cvarname, m_checked);
+	}
+
+	if (m_command.length()) // always seems to be NULL, could be remnant code
+	{
+		const char* text_to_append = m_checked ? " 1\n" : " 0\n";
+		m_command.append(text_to_append);
+		Cbuf_AddText(m_command.c_str());
+	}
+
+	if (m_commandhandler) // always seems to be NULL, could be remnant code
+	{
+		const char *checkedInt = va("%d", m_checked);
+		m_commandhandler(checkedInt, NULL);
+	}
 }
 
-void UICheckBox::MouseEntered
-	(
-	Event *ev
-	)
-
+void UICheckBox::MouseEntered(Event *ev)
 {
-	// FIXME: stub
+	auto num = ev->GetInteger(3);
+	uWinMan.ActivateControl(this);
+	if (num)
+	{
+		m_depressed = qtrue;
+	}
 }
 
-void UICheckBox::MouseExited
-	(
-	Event *ev
-	)
-
+void UICheckBox::MouseExited(Event *ev)
 {
-	// FIXME: stub
+	m_depressed = qfalse;
 }
 
-void UICheckBox::SetCheckedCommand
-	(
-	Event *ev
-	)
-
+void UICheckBox::SetCheckedCommand(Event *ev)
 {
-	// FIXME: stub
+	m_checked_command = ev->GetString(1);
 }
 
-void UICheckBox::SetUncheckedCommand
-	(
-	Event *ev
-	)
-
+void UICheckBox::SetUncheckedCommand(Event *ev)
 {
-	// FIXME: stub
+	m_unchecked_command = ev->GetString(1);
 }
 
-void UICheckBox::SetCheckedShader
-	(
-	Event *ev
-	)
-
+void UICheckBox::SetCheckedShader(Event *ev)
 {
-	// FIXME: stub
+	str shader = ev->GetString(1);
+	m_checked_material = uWinMan.RegisterShader(shader);
 }
 
-void UICheckBox::SetUncheckedShader
-	(
-	Event *ev
-	)
-
+void UICheckBox::SetUncheckedShader(Event *ev)
 {
-	// FIXME: stub
+	str shader = ev->GetString(1);
+	m_unchecked_material = uWinMan.RegisterShader(shader);
 }
 
-void UICheckBox::UpdateData
-	(
-	void
-	)
-
+void UICheckBox::UpdateData(void)
 {
-	// FIXME: stub
+	if (m_cvarname.length())
+	{
+		m_checked = UI_GetCvarInt(m_cvarname.c_str(), 0);
+	}
 }
 
-bool UICheckBox::isChecked
-	(
-	void
-	)
-
+bool UICheckBox::isChecked()
 {
-	// FIXME: stub
-	return false;
+	return m_checked;
 }
diff --git a/code/uilib/uicheckbox.h b/code/uilib/uicheckbox.h
index 871897b87..f303f2908 100644
--- a/code/uilib/uicheckbox.h
+++ b/code/uilib/uicheckbox.h
@@ -56,5 +56,10 @@ class UICheckBox : public UIWidget {
 	bool		isChecked( void );
 };
 
+extern Event EV_UICheckBox_SetCheckedCommand;
+extern Event EV_UICheckBox_SetUncheckedCommand;
+extern Event EV_UICheckBox_SetCheckedShader;
+extern Event EV_UICheckBox_SetUncheckedShader;
+
 #endif