From 318670c492fe5214b89ade00ce9b77c05a810481 Mon Sep 17 00:00:00 2001
From: yao <yeah7437@163.com>
Date: Thu, 25 Aug 2016 15:02:23 +0800
Subject: [PATCH] Update TransformableImage.js
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Add a minScale prop makes the image scales  minScale at least.
In the case of that the Image size is same with the screen size， when i double-tap the image,
i hope the image scale to the minScale instead of nothing happend.
---
 library/TransformableImage.js | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/library/TransformableImage.js b/library/TransformableImage.js
index 6da1c08..60738fc 100644
--- a/library/TransformableImage.js
+++ b/library/TransformableImage.js
@@ -23,7 +23,8 @@ export default class TransformableImage extends Component {
     enableScale: PropTypes.bool,
     enableTranslate: PropTypes.bool,
     onTransformGestureReleased: PropTypes.func,
-    onViewTransformed: PropTypes.func
+    onViewTransformed: PropTypes.func,
+    minScale: PropTypes.number
   };
 
   static defaultProps = {
@@ -63,6 +64,7 @@ export default class TransformableImage extends Component {
     let maxScale = 1;
     let contentAspectRatio = undefined;
     let width, height; //pixels
+    const { minScale } = this.props;
 
     if (this.props.pixels) {
       //if provided via props
@@ -78,11 +80,12 @@ export default class TransformableImage extends Component {
       contentAspectRatio = width / height;
       if (this.state.width && this.state.height) {
         maxScale = Math.max(width / this.state.width, height / this.state.height);
-        maxScale = Math.max(1, maxScale);
+        if(minScale){
+            maxScale = Math.max(minScale, maxScale);
+        }
       }
     }
 
-
     return (
       <ViewTransformer
         ref='viewTransformer'
@@ -178,4 +181,4 @@ function sameSource(source, nextSource) {
     }
   }
   return false;
-}
\ No newline at end of file
+}