improve touch interactions

Play button is larger (easier to touch). Can both start and stop sounds.
Sound doesn’t restart on mouseEnter if the sound is already playing.
Sound stops if you move off play button

Missing: stop button does not revert to play button when the sound finishes.

src/components/library-item/library-item.css

@@ -208,8 +208,8 @@
     justify-content: center;
 
     overflow: hidden;  /* Mask the icon animation */
-    width: 1.5rem;
-    height: 1.5rem;
+    width: 2.5rem;
+    height: 2.5rem;
     background-color: $sound-primary;
     color: $ui-white;
     border-radius: 50%;

src/components/library-item/library-item.jsx

@@ -9,9 +9,11 @@ import classNames from 'classnames';
 import bluetoothIconURL from './bluetooth.svg';
 import internetConnectionIconURL from './internet-connection.svg';
 import playIcon from './icon--play.svg';
+import stopIcon from './icon--stop.svg';
 
 const preventClick = e => {
     e.stopPropagation();
+    e.preventDefault();
 };
 
 /* eslint-disable react/prefer-stateless-function */
@@ -141,15 +143,14 @@ class LibraryItemComponent extends React.PureComponent {
                     <div
                         aria-label="Play"
                         className={styles.playButton}
-                        role="button"
-                        tabIndex="0"
                         onClick={preventClick}
-                        onMouseDown={this.props.onPlay}
+                        onMouseDown={this.props.isPlaying ? this.props.onStop : this.props.onPlay}
+                        onMouseLeave={this.props.isPlaying ? this.props.onStop : null}
                     >
                         <img
                             className={styles.playIcon}
                             draggable={false}
-                            src={playIcon}
+                            src={this.props.isPlaying ? stopIcon : playIcon}
                         />
                     </div>
                 ) : null}
@@ -174,6 +175,7 @@ LibraryItemComponent.propTypes = {
     iconURL: PropTypes.string,
     insetIconURL: PropTypes.string,
     internetConnectionRequired: PropTypes.bool,
+    isPlaying: PropTypes.bool,
     name: PropTypes.oneOfType([
         PropTypes.string,
         PropTypes.node
@@ -185,6 +187,7 @@ LibraryItemComponent.propTypes = {
     onMouseEnter: PropTypes.func.isRequired,
     onMouseLeave: PropTypes.func.isRequired,
     onPlay: PropTypes.func.isRequired,
+    onStop: PropTypes.func.isRequired,
     showPlayButton: PropTypes.bool
 };
 

src/components/library/library.jsx

@@ -43,7 +43,7 @@ class LibraryComponent extends React.Component {
             'setFilteredDataRef'
         ]);
         this.state = {
-            selectedItem: null,
+            playingItem: null,
             filterQuery: '',
             selectedTag: ALL_TAG.tag,
             loaded: false
@@ -75,10 +75,20 @@ class LibraryComponent extends React.Component {
         });
     }
     handleMouseEnter (id) {
-        if (this.props.onItemMouseEnter) this.props.onItemMouseEnter(this.getFilteredData()[id]);
+        console.log('Library MouseEnter id:', id, ', playingItem: ', this.state.playingItem);
+        // don't restart if mouse over already playing item
+        if (this.props.onItemMouseEnter && this.state.playingItem !== id) {
+            this.setState({
+                playingItem: id
+            }, this.props.onItemMouseEnter(this.getFilteredData()[id]));
+        }
     }
     handleMouseLeave (id) {
-        if (this.props.onItemMouseLeave) this.props.onItemMouseLeave(this.getFilteredData()[id]);
+        if (this.props.onItemMouseLeave) {
+            this.setState({
+                playingItem: null
+            }, this.props.onItemMouseLeave(this.getFilteredData()[id]));
+        }
     }
     handleFilterChange (event) {
         this.setState({
@@ -185,6 +195,7 @@ class LibraryComponent extends React.Component {
                             id={index}
                             insetIconURL={dataItem.insetIconURL}
                             internetConnectionRequired={dataItem.internetConnectionRequired}
+                            isPlaying={this.state.playingItem === index}
                             key={typeof dataItem.name === 'string' ? dataItem.name : dataItem.rawURL}
                             name={dataItem.name}
                             showPlayButton={this.props.showPlayButton}

src/containers/library-item.jsx

@@ -16,6 +16,7 @@ class LibraryItem extends React.PureComponent {
             'handleMouseEnter',
             'handleMouseLeave',
             'handlePlay',
+            'handleStop',
             'rotateIcon',
             'startRotatingIcons',
             'stopRotatingIcons'
@@ -65,8 +66,14 @@ class LibraryItem extends React.PureComponent {
     }
     handlePlay (e) {
         e.stopPropagation(); // To prevent from bubbling back to handleClick
+        e.preventDefault();
         this.props.onMouseEnter(this.props.id);
     }
+    handleStop (e) {
+        e.stopPropagation(); // To prevent from bubbling back to handleClick
+        e.preventDefault();
+        this.props.onMouseLeave(this.props.id);
+    }
     startRotatingIcons () {
         this.rotateIcon();
         this.intervalId = setInterval(this.rotateIcon, 300);
@@ -109,6 +116,7 @@ class LibraryItem extends React.PureComponent {
                 id={this.props.id}
                 insetIconURL={this.props.insetIconURL}
                 internetConnectionRequired={this.props.internetConnectionRequired}
+                isPlaying={this.props.isPlaying}
                 name={this.props.name}
                 showPlayButton={this.props.showPlayButton}
                 onBlur={this.handleBlur}
@@ -118,6 +126,7 @@ class LibraryItem extends React.PureComponent {
                 onMouseEnter={this.handleMouseEnter}
                 onMouseLeave={this.handleMouseLeave}
                 onPlay={this.handlePlay}
+                onStop={this.handleStop}
             />
         );
     }
@@ -144,6 +153,7 @@ LibraryItem.propTypes = {
     id: PropTypes.number.isRequired,
     insetIconURL: PropTypes.string,
     internetConnectionRequired: PropTypes.bool,
+    isPlaying: PropTypes.bool,
     name: PropTypes.oneOfType([
         PropTypes.string,
         PropTypes.node