Display timeplot graph values when pointing over the chart

FEA: ItEr76S04BugFixing

ganttzk/src/main/resources/web/js/ganttz/GanttPanel.js

@@ -51,7 +51,7 @@ ganttz.GanttPanel = zk.$extends(zk.Widget,{
      * it's not available right now. It is queried instead. Using throttle
      * to not re-query it constantly */
     _getTimeplotContainer: common.Common.throttle(500, function() {
-        return jq('canvas.timeplot-canvas');
+        return jq('canvas.timeplot-canvas').parent();
     }),
     _initializeProperties : function(){
         this._timetrackergap    = jq('.timetrackergap');

libreplan-webapp/src/main/java/org/libreplan/web/planner/chart/ChartFiller.java

@@ -631,6 +631,7 @@ public abstract class ChartFiller implements IChartFiller {
             ValueGeometry valueGeometry, TimeGeometry timeGeometry) {
         plotinfo.setValueGeometry(valueGeometry);
         plotinfo.setTimeGeometry(timeGeometry);
+        plotinfo.setShowValues(true);
         chart.appendChild(plotinfo);
     }
 

libreplan-webapp/src/main/webapp/planner/css/ganttzk.css

@@ -1317,4 +1317,24 @@ div.z-grid-header .second_level_ tr {
 
 .taskspanelgap #listlimitingdependencies {
     top: -2px;
+}
+
+.plannergraph {
+    overflow: hidden;
+}
+
+.plannergraph .timeplot-valueflag,
+.plannergraph .timeplot-timeflag {
+    font-size: 12px;
+    font-weight: normal;
+    background-color: #f7f7bf;
+    border: solid 1px #CCCCCC;
+    -moz-box-shadow: 1px 1px 3px #999;
+    -webkit-box-shadow: 1px 1px 3px #999;
+    border-radius: 3px;
+}
+
+.plannergraph .timeplot-timeflag {
+    opacity: 1 !important;
+    font-size: 12px;
 }