[native_pdf_view] Added onPageChanged callback. Bump 2.1.0

Author: SergeShkurko

packages/native_pdf_renderer/test/native_pdf_renderer_test.dart

@@ -98,7 +98,12 @@ void main() {
 
     test('open', () async {
       // page number 0 - not available
-      expect(document.getPage(0), throwsA(isInstanceOf<PdfPageNotFound>()));
+      expect(
+        document.getPage(0),
+        throwsA(
+          isInstanceOf<PdfNotSupportException>(),
+        ),
+      );
 
       page = await document.getPage(3);
       expect(log, <Matcher>[
@@ -117,7 +122,12 @@ void main() {
       expect(page.document, document);
 
       // page number 4 more than the document
-      expect(document.getPage(4), throwsA(isInstanceOf<PdfPageNotFound>()));
+      expect(
+        document.getPage(4),
+        throwsA(
+          isInstanceOf<PdfNotSupportException>(),
+        ),
+      );
     });
 
     test('render', () async {

packages/native_pdf_view/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.1.0
+
+* Added `onPageChanged` callback
+
 ## 2.0.0
 
 * Removed default padding

packages/native_pdf_view/lib/src/native_pdf_view.dart

@@ -15,6 +15,7 @@ class PDFView extends StatefulWidget {
   const PDFView({
     @required this.document,
     this.controller,
+    this.onPageChanged,
     this.loader = const SizedBox(),
     this.scrollDirection = Axis.horizontal,
     this.renderer = _render,
@@ -27,6 +28,7 @@ class PDFView extends StatefulWidget {
     @required this.document,
     @required this.builder,
     this.controller,
+    this.onPageChanged,
     this.loader = const SizedBox(),
     this.scrollDirection = Axis.horizontal,
     this.renderer = _render,
@@ -52,6 +54,9 @@ class PDFView extends StatefulWidget {
   /// Page management
   final PageController controller;
 
+  /// Called whenever the page in the center of the viewport changes
+  final void Function(int page) onPageChanged;
+
   /// Default PdfRenderer options
   static Future<PDFPageImage> _render(PDFPage page) => page.render(
         width: page.width * 2,
@@ -169,6 +174,7 @@ class _PDFViewState extends State<PDFView> {
         itemCount: widget.document.pagesCount,
         onPageChanged: (int index) {
           _currentIndex = index;
+          widget.onPageChanged?.call(index+1);
         },
         controller: widget.controller ?? _pageController,
         scrollDirection: widget.scrollDirection,

packages/native_pdf_view/pubspec.yaml

@@ -1,6 +1,6 @@
 name: native_pdf_view
 description: Flutter plugin to render PDF files on both Android and iOS devices. Provides a Widget to render the pages using a PageView.
-version: 2.0.0
+version: 2.1.0
 author: Serge Shkurko <sergeshkurko@outlook.com>
 homepage: https://github.com/rbcprolabs/packages.flutter/tree/master/packages/native_pdf_view