Disabled blocks option

README.md

@@ -88,6 +88,10 @@ import SortableGrid from 'react-native-sortable-grid'
  -  ``` dragStartAnimation ``` **Object**
 
   Custom animation to override the default wiggle. Must be an object containing a key ```transform```, which is an array of transformations. Read about [transforms](https://facebook.github.io/react-native/docs/transforms.html) and [animations](https://facebook.github.io/react-native/docs/animated.html) and [see the example](example/customAnimationExample.js#L47) to learn how to use this.
+
+ -  ``` disabledBlocks ``` **Array**
+
+  List of block indices that cannot be sorted. They cannot be dragged or displaced by dragging another block.
 
 ## SortableGrid methods
 

index.js

@@ -83,6 +83,7 @@ class SortableGrid extends Component {
     this.dragStartAnimation           = null
 
     this.rows              = null
+    this.disabledBlocks    = []
     this.dragPosition      = null
     this.activeBlockOffset = null
     this.blockWidth        = null
@@ -183,7 +184,7 @@ class SortableGrid extends Component {
           closestDistance = distance
         }
       })
-      if (closest !== this.state.activeBlock) {
+      if (this.disabledBlocks.indexOf(closest) === -1 && closest !== this.state.activeBlock) {
         Animated.timing(
           this._getBlock(closest).currentPosition,
           {
@@ -336,6 +337,9 @@ class SortableGrid extends Component {
   }
 
   activateDrag = (key) => () => {
+    if (this.disabledBlocks.indexOf(key) !== -1) {
+      return
+    }
     this.panCapture = true
     this.onDragStart( this.itemOrder[key] )
     this.setState({ activeBlock: key })