Add offsetX and offsetY props for manual position adjustment

Author: richardadjogah

lib/index.js

@@ -62,6 +62,8 @@ const Popover = createClass({
     preferPlace: T.oneOf(Layout.validTypeValues),
     place: T.oneOf(Layout.validTypeValues),
     tipSize: T.number,
+    offsetX: T.number,
+    offsetY: T.number,
     refreshIntervalMs: T.oneOfType([ T.number, T.bool ]),
     isOpen: T.bool,
     onOuterAction: T.func,
@@ -82,6 +84,8 @@ const Popover = createClass({
       preferPlace: null,
       place: null,
       offset: 4,
+      offsetX: 0,
+      offsetY: 0,
       isOpen: false,
       onOuterAction: function noOperation () {},
       enterExitTransitionDurationMs: 500,
@@ -210,8 +214,8 @@ const Popover = createClass({
     /* Apply Absolute Positioning. */
 
     log(`pos`, pos)
-    this.containerEl.style.top = `${pos.y}px`
-    this.containerEl.style.left = `${pos.x}px`
+    this.containerEl.style.top = `${pos.y + this.props.offsetY}px`
+    this.containerEl.style.left = `${pos.x + this.props.offsetX}px`
 
     /* Calculate Tip Position */