Fix graph focusNodeAdjacency do not support emphasis opacity and opacity is bug on hoverLayer.

src/chart/graph/GraphView.js

@@ -34,13 +34,14 @@ var nodeOpacityPath = ['itemStyle', 'opacity'];
 var lineOpacityPath = ['lineStyle', 'opacity'];
 
 function getItemOpacity(item, opacityPath) {
-    return item.getVisual('opacity') || item.getModel().get(opacityPath);
+    var opacity = item.getVisual('opacity');
+    return opacity != null ? opacity : item.getModel().get(opacityPath);
 }
 
 function fadeOutItem(item, opacityPath, opacityRatio) {
     var el = item.getGraphicEl();
-
     var opacity = getItemOpacity(item, opacityPath);
+
     if (opacityRatio != null) {
         opacity == null && (opacity = 1);
         opacity *= opacityRatio;
@@ -48,7 +49,7 @@ function fadeOutItem(item, opacityPath, opacityRatio) {
 
     el.downplay && el.downplay();
     el.traverse(function (child) {
-        if (child.type !== 'group') {
+        if (!child.isGroup) {
             var opct = child.lineLabelOriginalOpacity;
             if (opct == null || opacityRatio != null) {
                 opct = opacity;
@@ -61,13 +62,13 @@ function fadeOutItem(item, opacityPath, opacityRatio) {
 function fadeInItem(item, opacityPath) {
     var opacity = getItemOpacity(item, opacityPath);
     var el = item.getGraphicEl();
-
-    el.highlight && el.highlight();
+    // Should go back to normal opacity first, consider hoverLayer, 
+    // where current state is copied to elMirror, and support
+    // emphasis opacity here.
     el.traverse(function (child) {
-        if (child.type !== 'group') {
-            child.setStyle('opacity', opacity);
-        }
+        !child.isGroup && child.setStyle('opacity', opacity);
     });
+    el.highlight && el.highlight();
 }
 
 export default echarts.extendChartView({

test/hoverStyle.html

@@ -343,7 +343,13 @@ under the License.
                             {value: 100, name: 'aa', x: 100, y: 200},
                             {value: 150, name: 'bb', x: 450, y: 300},
                             {value: 200, name: 'cc', x: 200, y: 100},
-                            {value: 250, name: 'dd', x: 450, y: 250}
+                            {value: 250, name: 'dd', x: 450, y: 250, 
+                                emphasis: {
+                                    itemStyle: {
+                                        color: 'blue'
+                                    }
+                                }
+                            }
                         ],
                         links: [
                             {source: 'aa', target: 'bb'},
@@ -360,7 +366,6 @@ under the License.
                                 color: 'orange',
                                 type: 'solid',
                                 width: 8
-                                // opacity: .8
                             }
                         }
                     }]
@@ -368,8 +373,8 @@ under the License.
 
                 var chart = testHelper.create(echarts, 'mainb4', {
                     title: [
-                        'normal line is **green dashed width 3**,', 
-                        'should become **orange solid width 8** when hovered'
+                        'normal style is **line: green dashed width 3, node: red**,', 
+                        'should become **line: orange solid width 8, node: only "dd" blue** when hovered'
                     ],
                     option: option,
                     height: 200