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moehu/moehu_fontend/lib/views/ImageView/.pydio

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moehu/moehu_fontend/lib/views/ImageView/ImageView.dart

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+import 'package:flutter/material.dart';
+import 'package:peach/entity/_.dart';
+import 'package:photo_view/photo_view.dart';
+import 'package:photo_view/photo_view_gallery.dart';
+
+/*
+ * 查看大图 
+ */
+class PhotoViewGalleryScreen extends StatefulWidget {
+  List<ImagePickerEntity> images = [];
+  int index = 0;
+  String heroTag;
+  PageController controller;
+
+  PhotoViewGalleryScreen(
+      {Key key,
+      @required this.images,
+      this.index,
+      this.controller,
+      this.heroTag})
+      : super(key: key) {
+    controller = PageController(initialPage: index);
+  }
+
+  @override
+  _PhotoViewGalleryScreenState createState() => _PhotoViewGalleryScreenState();
+}
+
+class _PhotoViewGalleryScreenState extends State<PhotoViewGalleryScreen> {
+  int currentIndex = 0;
+
+  @override
+  void initState() {
+    super.initState();
+    currentIndex = widget.index;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Stack(
+        children: <Widget>[
+          Positioned(
+            top: 0,
+            left: 0,
+            bottom: 0,
+            right: 0,
+            child: Container(
+              child: PhotoViewGallery.builder(
+                scrollPhysics: const BouncingScrollPhysics(),
+                builder: (BuildContext context, int index) {
+                  return PhotoViewGalleryPageOptions(
+                    imageProvider: widget.images[index].getNetWorkPath != null
+                        ? NetworkImage(widget.images[index]?.getNetWorkPath)
+                        : FileImage(widget.images[index]?.getPath),
+                  );
+                },
+                itemCount: widget.images.length,
+                backgroundDecoration: null,
+                pageController: widget.controller,
+                enableRotation: true,
+                onPageChanged: (index) {
+                  setState(
+                    () {
+                      currentIndex = index;
+                    },
+                  );
+                },
+              ),
+            ),
+          ),
+          Positioned(
+            //图片index显示
+            top: MediaQuery.of(context).padding.top + 15,
+            width: MediaQuery.of(context).size.width,
+            child: Center(
+              child: Text("${currentIndex + 1}/${widget.images.length}",
+                  style: TextStyle(color: Colors.white, fontSize: 16)),
+            ),
+          ),
+          Positioned(
+            //右上角关闭按钮
+            right: 10,
+            top: MediaQuery.of(context).padding.top,
+            child: IconButton(
+              icon: Icon(
+                Icons.close,
+                size: 30,
+                color: Colors.white,
+              ),
+              onPressed: () {
+                Navigator.of(context).pop();
+              },
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class FadeRoute extends PageRouteBuilder {
+  final Widget page;
+  FadeRoute({this.page})
+      : super(
+          pageBuilder: (
+            BuildContext context,
+            Animation<double> animation,
+            Animation<double> secondaryAnimation,
+          ) =>
+              page,
+          transitionsBuilder: (
+            BuildContext context,
+            Animation<double> animation,
+            Animation<double> secondaryAnimation,
+            Widget child,
+          ) =>
+              FadeTransition(
+            opacity: animation,
+            child: child,
+          ),
+        );
+}