fix showflagdialog and main to override the showflag property

example/lib/main.dart

@@ -38,9 +38,8 @@ class _MyAppState extends State<MyApp> {
                 // Initial selection and favorite can be one of code ('IT') OR dial_code('+39')
                 initialSelection: 'IT',
                 favorite: ['+39', 'FR'],
-                showFlag: false,
                 countryFilter: ['IT', 'FR'],
-                showFlagDialog: true,
+                showFlagDialog: false,
                 comparator: (a, b) => b.name.compareTo(a.name),
                 //Get the country information relevant to the initial selection
                 onInit: (code) =>
@@ -53,14 +52,13 @@ class _MyAppState extends State<MyApp> {
                   padding: const EdgeInsets.all(8.0),
                   child: CountryCodePicker(
                     onChanged: print,
+                    showFlagMain: true,
+                    showFlag: false,
                     initialSelection: 'TF',
                     hideSearch: true,
                     showCountryOnly: true,
                     showOnlyCountryWhenClosed: true,
                     alignLeft: true,
-                    builder: (countryCode) {
-                      return Text('${countryCode.code}');
-                    },
                   ),
                 ),
               ),

lib/country_code_picker.dart

@@ -132,7 +132,9 @@ class CountryCodePickerState extends State<CountryCodePicker> {
           direction: Axis.horizontal,
           mainAxisSize: MainAxisSize.min,
           children: <Widget>[
-            if (widget.showFlag || (widget.showFlagMain == true))
+            if (widget.showFlagMain != null
+                ? widget.showFlagMain
+                : widget.showFlag)
               Flexible(
                 flex: widget.alignLeft ? 0 : 1,
                 fit: widget.alignLeft ? FlexFit.tight : FlexFit.loose,
@@ -231,7 +233,9 @@ class CountryCodePickerState extends State<CountryCodePicker> {
         searchDecoration: widget.searchDecoration,
         searchStyle: widget.searchStyle,
         textStyle: widget.dialogTextStyle,
-        showFlag: widget.showFlag || (widget.showFlagDialog == true),
+        showFlag: widget.showFlagDialog != null
+            ? widget.showFlagDialog
+            : widget.showFlag,
         flagWidth: widget.flagWidth,
         size: widget.dialogSize,
         hideSearch: widget.hideSearch,