From 9a5bc738c507f3fc55f0ff65e5c1ccc23e6988a3 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Mon, 6 Jun 2016 19:51:46 -0400
Subject: [PATCH] Implemented likewise on Windows.

---
 windows/radiobuttons.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/windows/radiobuttons.cpp b/windows/radiobuttons.cpp
index d2b80b53..3063d3cd 100644
--- a/windows/radiobuttons.cpp
+++ b/windows/radiobuttons.cpp
@@ -12,6 +12,8 @@ struct uiRadioButtons {
 	uiWindowsControl c;
 	HWND hwnd;					// of the container
 	std::vector<HWND> *hwnds;		// of the buttons
+	void (*onSelected)(uiRadioButtons *, void *);
+	void *onSelectedData;
 };
 
 static BOOL onWM_COMMAND(uiControl *c, HWND clicked, WORD code, LRESULT *lResult)
@@ -28,10 +30,16 @@ static BOOL onWM_COMMAND(uiControl *c, HWND clicked, WORD code, LRESULT *lResult
 			check = BST_CHECKED;
 		SendMessage(hwnd, BM_SETCHECK, check, 0);
 	}
+	(*(r->onSelected))(r, r->onSelectedData);
 	*lResult = 0;
 	return TRUE;
 }
 
+static void defaultOnSelected(uiRadioButtons *r, void *data)
+{
+	// do nothing
+}
+
 static void uiRadioButtonsDestroy(uiControl *c)
 {
 	uiRadioButtons *r = uiRadioButtons(c);
@@ -141,6 +149,33 @@ void uiRadioButtonsAppend(uiRadioButtons *r, const char *text)
 	uiWindowsControlMinimumSizeChanged(uiWindowsControl(r));
 }
 
+intmax_t uiRadioButtonsSelected(uiRadioButtons *r)
+{
+	size_t i;
+
+	for (i = 0; i < r->hwnds->size(); i++)
+		if (SendMessage((*(r->hwnds))[i], BM_GETCHECK, 0, 0) == BST_CHECKED)
+			return i;
+	return -1;
+}
+
+void uiRadioButtonsSetSelected(uiRadioButtons *r, intmax_t n)
+{
+	intmax_t m;
+
+	m = uiRadioButtonsSelected(r);
+	if (m != -1)
+		SendMessage((*(r->hwnds))[m], BM_SETCHECK, BST_UNCHECKED, 0);
+	if (n != -1)
+		SendMessage((*(r->hwnds))[n], BM_SETCHECK, BST_CHECKED, 0);
+}
+
+void uiRadioButtonsOnSelected(uiRadioButtons *r, void (*f)(uiRadioButtons *, void *), void *data)
+{
+	r->onSelected = f;
+	r->onSelectedData = data;
+}
+
 static void onResize(uiWindowsControl *c)
 {
 	radiobuttonsRelayout(uiRadioButtons(c));
@@ -156,5 +191,7 @@ uiRadioButtons *uiNewRadioButtons(void)
 
 	r->hwnds = new std::vector<HWND>;
 
+	uiRadioButtonsOnSelected(r, defaultOnSelected, NULL);
+
 	return r;
 }