REPORT-74080 fix: 修复自定义图标无法居中，调整了撑开的公式

demo/js/base/button/demo.button.js

@@ -256,6 +256,17 @@ Demo.Button = BI.inherit(BI.Widget, {
                 iconGap: 24,
                 iconPosition: "top"
             }
+        },{
+            el: {
+                type: "bi.button",
+                text: "自动撑开高度",
+                iconCls: "close-font",
+                textHeight: 32,
+                iconGap: 24,
+                vgap: 16,
+                hgap: 100,
+                iconPosition: "top"
+            }
         }, {
             el: {
                 type: "bi.button",

src/base/single/button/buttons/button.js

@@ -14,20 +14,29 @@
     BI.Button = BI.inherit(BI.BasicButton, {
 
         _const: {
-            iconWidth: 16
+            iconWidth: 18
         },
 
         _defaultConfig: function (props) {
             var conf = BI.Button.superclass._defaultConfig.apply(this, arguments);
 
+            var adaptiveHeight = 0;
+            if (isVertical(props.iconPosition)) {
+                // 图标高度和文字高度默认相等
+                adaptiveHeight += (props.textHeight || 16) * 2;
+                adaptiveHeight += props.iconGap || 4;
+                var tGap = props.tgap || props.vgap || 2;
+                var bGap = props.bgap || props.vgap || 2;
+                adaptiveHeight += (tGap + bGap);
+            }
+
             return BI.extend(conf, {
                 baseCls: (conf.baseCls || "") + " bi-button" + ((BI.isIE() && BI.isIE9Below()) ? " hack" : ""),
                 attributes: {
                     tabIndex: 1
                 },
                 minWidth: (props.block === true || props.clear === true) ? 0 : 80,
-                // 44 = 垂直间距 6 + 边框 2 + 图标 16 + 图标和文字间隔 8 + 文字 12
-                height: isVertical(props.iconPosition) ? 44 + ((props.iconGap || 8) - 8) : 24,
+                height: isVertical(props.iconPosition) ? adaptiveHeight : 24,
                 shadow: props.clear !== true,
                 isShadowShowingOnSelected: true,
                 readonly: true,
@@ -49,7 +58,7 @@
                 bgap: 0,
                 lgap: 0,
                 rgap: 0,
-                iconGap: 8,
+                iconGap: 4,
                 iconPosition: "left"
             });
         },
@@ -81,7 +90,10 @@
                     cls: o.iconCls,
                     width: this._const.iconWidth,
                     height: lineHeight,
-                    lineHeight: lineHeight
+                    lineHeight: lineHeight,
+                    // 不设置，自定义按钮无法居中
+                    iconWidth: o.iconWidth,
+                    iconHeight: o.iconHeight
                 });
                 this.text = BI.createWidget({
                     type: "bi.label",