DEC-18525 fix: 单选下拉框popup高度计算错误导致遮挡

src/widget/singleselect/singleselect.list.js

@@ -7,6 +7,10 @@
  */
 BI.SingleSelectList = BI.inherit(BI.Widget, {
 
+    _constants: {
+        itemHeight: 24
+    },
+
     _defaultConfig: function () {
         return BI.extend(BI.SingleSelectList.superclass._defaultConfig.apply(this, arguments), {
             baseCls: "bi-select-list",
@@ -61,7 +65,7 @@ BI.SingleSelectList = BI.inherit(BI.Widget, {
             items: o.allowNoSelect ? BI.LogicFactory.createLogicItemsByDirection(o.direction, {
                 type: "bi.single_select_item",
                 cls: "bi-list-item-active",
-                height: 24,
+                height: this._constants.itemHeight,
                 forceNotSelected: true,
                 text: BI.i18nText("BI-Basic_No_Select"),
                 ref: function (_ref) {
@@ -116,7 +120,7 @@ BI.SingleSelectList = BI.inherit(BI.Widget, {
 
     resetHeight: function (h) {
         this.list.resetHeight ? this.list.resetHeight(h) :
-            this.list.element.css({"max-height": h / BI.pixRatio + BI.pixUnit});
+            this.list.element.css({"max-height": (h - (this.options.allowNoSelect ? this._constants.itemHeight : 0)) / BI.pixRatio + BI.pixUnit});
     },
 
     setNotSelectedValue: function () {

src/widget/singleselect/singleselect.loader.js

@@ -6,6 +6,10 @@
  */
 BI.SingleSelectLoader = BI.inherit(BI.Widget, {
 
+    _constants: {
+        itemVgap: 5
+    },
+
     _defaultConfig: function () {
         return BI.extend(BI.SingleSelectLoader.superclass._defaultConfig.apply(this, arguments), {
             baseCls: "bi-single-select-loader",
@@ -92,7 +96,7 @@ BI.SingleSelectLoader = BI.inherit(BI.Widget, {
             type: "bi.vertical",
             element: this,
             items: [this.button_group],
-            vgap: 5
+            vgap: this._constants.itemVgap
         });
 
         this.button_group.on(BI.Controller.EVENT_CHANGE, function () {
@@ -151,7 +155,7 @@ BI.SingleSelectLoader = BI.inherit(BI.Widget, {
     },
 
     resetHeight: function (h) {
-        this.button_group.resetHeight(h);
+        this.button_group.resetHeight(h - this._constants.itemVgap * 2);
     },
 
     resetWidth: function (w) {