From 0ee75bcff070db91c46bafc3babca8c17e074b8b Mon Sep 17 00:00:00 2001
From: Chloe <chloe@holoswitch.com>
Date: Tue, 12 May 2020 22:47:33 +0200
Subject: [PATCH] feat: add scaleForDoubleTap to set the desire scale.

---
 lib/src/zoomable/zoomable_widget.dart | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/lib/src/zoomable/zoomable_widget.dart b/lib/src/zoomable/zoomable_widget.dart
index 3ab4895..0d36c31 100644
--- a/lib/src/zoomable/zoomable_widget.dart
+++ b/lib/src/zoomable/zoomable_widget.dart
@@ -5,8 +5,10 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter_advanced_networkimage/src/utils.dart';
 
 class ZoomableWidget extends StatefulWidget {
+  
   ZoomableWidget({
     Key key,
+    this.scaleForDoubleTap: 1.0,
     this.minScale: 0.7,
     this.maxScale: 1.4,
     this.initialScale: 1.0,
@@ -27,7 +29,8 @@ class ZoomableWidget extends StatefulWidget {
     this.onZoomChanged,
     this.resetDuration: const Duration(milliseconds: 250),
     this.resetCurve: Curves.easeInOut,
-  })  : assert(minScale != null),
+  })  : assert(scaleForDoubleTap != null),
+        assert(minScale != null),
         assert(maxScale != null),
         assert(initialScale != null),
         assert(initialOffset != null),
@@ -43,6 +46,9 @@ class ZoomableWidget extends StatefulWidget {
         assert(enableFling != null),
         assert(flingFactor != null);
 
+  /// The scale size for double tap
+  final double scaleForDoubleTap;
+
   /// The minimum size for scaling.
   final double minScale;
 
@@ -244,10 +250,10 @@ class _ZoomableWidgetState extends State<ZoomableWidget> {
     _curve = widget.resetCurve;
 
     if (widget.zoomSteps > 0)
-      _stepLength = (widget.maxScale - 1.0) / widget.zoomSteps;
+      _stepLength = (widget.scaleForDoubleTap - 1.0) / widget.zoomSteps;
 
     double _tmpZoom = _zoom + _stepLength;
-    if (_tmpZoom > widget.maxScale || _stepLength == 0.0) _tmpZoom = 1.0;
+    if (_tmpZoom > widget.scaleForDoubleTap || _stepLength == 0.0) _tmpZoom = 1.0;
 
     setState(() {
       _zoom = _tmpZoom;