add doneButtonPersist & rename

doneButtonPersist keeps the done button on screen throughout the pages
ignore opacity transition when enabled.
rename to doneText, skip Text to keep inline with onPressedSkipButton & onPressedDoneButton
update readme

Author: taljacobson

README.md

@@ -113,10 +113,11 @@ You should then run `flutter packages get` in your terminal so as to get the pac
 | showSkipButton | Bool | Show the skip button at the bottom of page. | true   |
 | pageButtonTextSize | Double | Set the button text size. | 18.0 |
 | pageButtonFontFamily | String | Set the font of button text. | Default |
-| skip | Text | Override SkipButton Text and styles. | null |
-| done | Text | Override DoneButton Text and styles. | null |
 | onTapSkipButton | VoidCallback | Method executes on tapping skip button. | null |
 | pageButtonTextStyles | TextStyle | Configure TextStyle for skip, done buttons, overrides pageButtonFontFamily, pageButtonsColor, pageButtonTextSize. | fontSize: `18.0`, color: `Colors.white` |
+| skipText | Text | Override SkipButton Text and styles. | Text('SKIP') |
+| doneText | Text | Override DoneButton Text and styles. | Text('DONE') |
+| doneButtonPersist | Bool | show done Button throughout pages | false |
 
 For help on editing package code, view the [flutter documentation](https://flutter.io/developing-packages/).
 

lib/UI/page.dart

@@ -63,18 +63,19 @@ class Page extends StatelessWidget {
             pageViewModel: pageViewModel), //Transform
 
         new Flexible(
-            child: new Column(
-          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-          children: <Widget>[
-            new _TitlePageTransform(
-                percentVisible: percentVisible,
-                pageViewModel: pageViewModel), //Transform
-            new _BodyPageTransform(
-                percentVisible: percentVisible,
-                pageViewModel: pageViewModel), //Transform
-          ],
-        ) // Column
-            ),
+          child: new Column(
+            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+            mainAxisSize: MainAxisSize.max,
+            children: <Widget>[
+              new _TitlePageTransform(
+                  percentVisible: percentVisible,
+                  pageViewModel: pageViewModel), //Transform
+              new _BodyPageTransform(
+                  percentVisible: percentVisible,
+                  pageViewModel: pageViewModel), //Transform
+            ],
+          ), // Column
+        ),
       ],
     );
   }

lib/UI/page_indicator_buttons.dart

@@ -94,9 +94,12 @@ class PageIndicatorButtons extends StatelessWidget {
   final double slidePercent;
   final bool showSkipButton;
 
-  final Text endText;
-  final Text startText;
+  final Text doneText;
+  final Text skipText;
   final TextStyle textStyle;
+
+  final bool doneButtonPersist;
+
   //Constructor
   PageIndicatorButtons({
     @required this.acitvePageIndex,
@@ -106,9 +109,10 @@ class PageIndicatorButtons extends StatelessWidget {
     this.slidePercent,
     this.onPressedSkipButton,
     this.showSkipButton = true,
-    this.startText,
-    this.endText,
+    this.skipText,
+    this.doneText,
     this.textStyle,
+    this.doneButtonPersist,
   });
 
   @override
@@ -131,7 +135,7 @@ class PageIndicatorButtons extends StatelessWidget {
                               slideDirection == SlideDirection.leftToRight)) &&
                       showSkipButton)
                   ? new SkipButton(
-                      child: startText,
+                      child: skipText,
                       onTap: onPressedSkipButton,
                       pageButtonViewModel: new PageButtonViewModel(
                         //View Model
@@ -148,15 +152,16 @@ class PageIndicatorButtons extends StatelessWidget {
               padding: const EdgeInsets.only(bottom: 10.0),
               child: (acitvePageIndex == totalPages - 1 ||
                       (acitvePageIndex == totalPages - 2 &&
-                          slideDirection == SlideDirection.rightToLeft))
+                              slideDirection == SlideDirection.rightToLeft ||
+                          doneButtonPersist))
                   ? new DoneButton(
-                      child: endText,
+                      child: doneText,
                       onTap: onPressedDoneButton,
                       pageButtonViewModel: new PageButtonViewModel(
                         //view Model
                         activePageIndex: acitvePageIndex,
                         totalPages: totalPages,
-                        slidePercent: slidePercent,
+                        slidePercent: doneButtonPersist ? 0.0 : slidePercent,
                         slideDirection: slideDirection,
                       ),
                     )

lib/intro_views_flutter.dart

@@ -48,11 +48,14 @@ class IntroViewsFlutter extends StatefulWidget {
   /// gets overridden by [pageButtonTextStyles]
   final String pageButtonFontFamily;
 
-  /// Override 'DONE' Text with Your Own Text, its TextStyle will be copied and override [pageButtonTextSize] [PageButtonFontFamily] [PageButtonsColor]
-  final Text endText;
+  /// Override 'DONE' Text with Your Own Text,
+  final Text doneText;
 
-  /// Override 'Skip' Text with Your Own Text, its TextStyle will be copied and override [pageButtonTextSize] [PageButtonFontFamily] [PageButtonsColor]
-  final Text startText;
+  /// Override 'Skip' Text with Your Own Text,
+  final Text skipText;
+
+  /// always Show DoneButton
+  final bool doneButtonPersist;
   IntroViewsFlutter(
     this.pages, {
     Key key,
@@ -63,8 +66,9 @@ class IntroViewsFlutter extends StatefulWidget {
     this.pageButtonFontFamily,
     this.onTapSkipButton,
     this.pageButtonsColor,
-    this.endText =  const Text("DONE"),
-    this.startText = const Text("SKIP"),
+    this.doneText = const Text("DONE"),
+    this.skipText = const Text("SKIP"),
+    this.doneButtonPersist = false,
   }) : super(key: key);
 
   @override
@@ -218,8 +222,9 @@ class _IntroViewsFlutterState extends State<IntroViewsFlutter>
               });
             },
             showSkipButton: widget.showSkipButton,
-            endText: widget.endText,
-            startText: widget.startText,
+            doneText: widget.doneText,
+            skipText: widget.skipText,
+            doneButtonPersist: widget.doneButtonPersist,
           ),
 
           new PageDragger(