1 files changed, 50 insertions, 0 deletions
diff --git a/redo/controls_windows.c b/redo/controls_windows.c
index c660bd7..2c5934d 100644
--- a/redo/controls_windows.c
+++ b/redo/controls_windows.c
@@ -75,3 +75,53 @@ void setButtonSubclass(HWND hwnd, void *data)
 	if ((*fv_SetWindowSubclass)(hwnd, buttonSubProc, 0, (DWORD_PTR) data) == FALSE)
 		xpanic("error subclassing Button to give it its own event handler", GetLastError());
 }
+
+static LRESULT CALLBACK checkboxSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
+{
+	switch (uMsg) {
+	case msgCOMMAND:
+		if (HIWORD(wParam) == BN_CLICKED) {
+			WPARAM check;
+
+			/* we didn't use BS_AUTOCHECKBOX (see controls_windows.go) so we have to manage the check state ourselves */
+			check = BST_CHECKED;
+			if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_CHECKED)
+				check = BST_UNCHECKED;
+			SendMessage(hwnd, BM_SETCHECK, check, 0);
+			checkboxToggled((void *) data);
+			return 0;
+		}
+		return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
+	case WM_NCDESTROY:
+		if ((*fv_RemoveWindowSubclass)(hwnd, buttonSubProc, id) == FALSE)
+			xpanic("error removing Checkbox subclass (which was for its own event handler)", GetLastError());
+		return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
+	default:
+		return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
+	}
+	xmissedmsg("Checkbox", "checkboxSubProc()", uMsg);
+	return 0;		/* unreached */
+}
+
+void setCheckboxSubclass(HWND hwnd, void *data)
+{
+	if ((*fv_SetWindowSubclass)(hwnd, checkboxSubProc, 0, (DWORD_PTR) data) == FALSE)
+		xpanic("error subclassing Checkbox to give it its own event handler", GetLastError());
+}
+
+BOOL checkboxChecked(HWND hwnd)
+{
+	if (SendMessage(hwnd, BM_GETCHECK, 0, 0) == BST_UNCHECKED)
+		return FALSE;
+	return TRUE;
+}
+
+void checkboxSetChecked(HWND hwnd, BOOL c)
+{
+	WPARAM check;
+
+	check = BST_CHECKED;
+	if (c == FALSE)
+		check = BST_UNCHECKED;
+	SendMessage(hwnd, BM_SETCHECK, check, 0);
+}