Behavior Customization

22 Feb 2018 / 10 minutes to read

RangeNavigator allows you to customize the control using events. You can change the range for selected data of the RangeNavigator using events.

Deferred update

If you set EnableDeferredUpdate to true, the RangeChanged event gets fired after dragging and dropping the slider. By default the EnableDeferredUpdate is true. If EnableDeferredUpdate is false then the RangeChanged event gets fired while dragging the slider.

  • cshtml
  • [
    @(Html.EJ().RangeNavigator("container")
    
    . EnableDeferredUpdate (true)
    
    )

    Deferred update

    Methods

    Destroy

    This method is used to destroy the RangeNavigator widget.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
       
    )
    <script type="text/javascript">  
        
    	var obj = $("#container").data("ejRangeNavigator");
        obj.destroy(); // destroy the range navigator
    
    </script>

    Handle Events

    Load

    This event is fired when RangeNavigator is loading. A parameter sender is passed to the handler. Using sender.model, you can access the RangeNavigator properties.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
    .Load("loadingData")
       
    )
    
    <script type="text/javascript">
    
    	function loadingData(sender) 
    	{
    
    		 sender.model.allowSnapping = false;
    
    	}
    
    </script>

    Loaded

    This event is handled when the RangeNavigator gets loaded. A parameter sender is passed to the handler. Using sender.model, you can access the RangeNavigator properties.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
    .Loaded("loadingData")
    
       
    )
    
    <script type="text/javascript">
    
    	function loadingData(sender) 
    	{
    
    		 sender.model.isResponsive = false;
    
    	}
    
    </script>

    RangeChanged

    This event gets fired whenever the selected range changes in RangeNavigator. A parameter sender is passed to the handler. Using sender.selectedRangeSettings, you can access the start and end value of range for the selected region.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
        
    .RangeChanged("loadingData")
    
    )
    
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    
    		 console.log(sender.selectedRangeSettings.start);
    
       }
    
    </script>

    SelectedRangeStart

    This event is fired when starting to change the slider position in RangeNavigator. A parameter sender is passed to the handler. Using sender.selectedRangeSettings, you can access the start value of range for the selected region.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
        
    .SelectedRangeStart("loadingData")
    
    )
    
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    
    		 console.log(sender.selectedRangeSettings.start);
    
       }
    
    </script>

    SelectedRangeEnd

    This event is fired when selection ends in RangeNavigator. A parameter sender is passed to the handler. Using sender.selectedRangeSettings, you can access the end value of range for the selected region.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
        
    .SelectedRangeEnd("loadingData")
    
    )
    
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    
    		 console.log(sender.selectedRangeSettings.end);
    
       }
    
    </script>

    ScrollStart

    This event is fired when starting to change the scrollbar position of RangeNavigator. A parameter sender is passed to the handler. Using sender.data startRange and sender.data endRange, you can access the scrollbar position starting and ending range value on changed scrollbar.

  • javascript
  • @(Html.EJ().RangeNavigator("container")
        
    .ScrollStart(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    ScrollEnd

    This event is fired while ending the change in scrollbar position of RangeNavigator. A parameter sender is passed to the handler. Using data oldRange and data newRange, you can access the scrollbar position old and new range values on changing scrollbar.

  • javascript
  • @(Html.EJ().RangeNavigator("container")
        
    .ScrollEnd(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    ScrollChanged

    This event is fired when changing the scrollbar position of RangeNavigator. A parameter sender is passed to the handler. Using data oldRange and data newRange, you can access the old and new range values of changed scrollbar position.

  • javascript
  • @(Html.EJ().RangeNavigator("container")
        
    .ScrollChanged(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    Click

    Click event is handled when the RangeNavigator gets clicked. A parameter sender is passed to the handler. Using sender.model, you can access the RangeNavigator properties.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
        
    .Click(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    DoubleClick

    DoubleClick event is handled when the RangeNavigator gets clicked. A parameter sender is passed to the handler. Using sender.model, you can access the RangeNavigator properties.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
        
    .DoubleClick(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    RightClick

    RightClick event is handled when the RangeNavigator gets clicked. A parameter sender is passed to the handler. Using sender.model, you can access the RangeNavigator properties.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
        
    .RightClick(loadingData)
    
    )
    <script type="text/javascript">
    
       function loadingData(sender) 
       {
    	   	console.log(sender.type);
       }
    
    </script>

    Use of ZoomCoordinates

    RangeNavigator is used along with the controls like chart and grid to view the selected data. To update chart/grid, whenever the selected range changes in RangeNavigator, you can use RangeChanged event of RangeNavigator and then update the chart/grid with the selected data in this event.

    You can easily update the data for chart by assigning the ZoomFactor and ZoomPosition of the RangeNavigator to the chart axis.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
    .RangeChanged("loadingData")
    
    )
    
    <script type="text/javascript">
    
    	// setting zoom factor and position for chart axis in rangeChanged event.
    
    	function loadingData(sender) 
    	{
    
    	 var chart = $("#container").data("ejChart");
    
    	 if (chart != null) 
    	 {
    
    		 chart.model.axes[0].zoomPosition = sender. zoomPosition;                                                               
    
    		 chart.model.axes[0].zoomFactor = sender. zoomFactor;
    
    		}
    
    		$("#container").ejChart("redraw");
    
    	}
    
    </script>

    Thumb Template

    You can customize Thumb template by using LeftThumbTemplate and RightThumbTemplate property. You can add the required template as a “div” element with an “id” to the web page and assign the id or assign the HTML string to this property under NavigatorStyleSettings.

  • cshtml
  • <script type="text/x-jsrender" id="left" >
    
               <svg height="24" width="32" style="fill:#DD4A4A;stroke:black;">
    
                    <path d="M2 2 L2 22 L22 22 L32 12 L22 2 Z" />
    
               </svg>
    
    </script>
    
    <script type="text/x-jsrender" id="right">
    
               <svg height="24" width="32" style="fill:#DD4A4A;stroke:black; ">
    
                   <path d="M2 12 L12 22 L32 22 L32 2 L12 2 Z" />
    
               </svg>
    
    </script>
    
    
    @(Html.EJ().RangeNavigator("container")
    
    	            // ...              
    
          .NavigatorStyleSettings(navigator=>navigator.LeftThumbTemplate("left")
    
                     .RightThumbTemplate("right"))
    
                     // ... 
    
    )

    The following screenshot displays the RangeNavigator using thumb template.

    Value Axis Settings

    You can customize the line, Font Size, gridline, tickline, range, RangePadding and visibility of RangeNavigator axis.

    To enable the visibility of axis line, you need to set Visible property of AxisLine in ValueAxisSettings.

    You can customize the axis range by specifying Min, Max and Interval for Range property.

    The MajorGridLines can be enabled by specifying Visible property. The Size, Width and Visible property of MajorTickLines is used to customize the axis tick lines.

    The visibility of ValueAxisSettings is enabled by setting Visible property as true.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
    	            // ...             
                    .ValueAxisSettings(value=>value                        
    							.AxisLine(axis=>axis.Visible(true))
    							.Font(f=>f.Size('12px'))
    							.MajorGridLines(grid=>grid.Visible(true))
    							.MajorTickLines(tick=>tick.Size(3).Visible(false).Width(3))
    							.Range(range=>range.Min(0).Max(100).Interval(10))
    							.RangePadding(RangePadding.Normal),
    							.Visible(true)
    				)
                       // ...             
                 )

    Selected Range Settings

    The start and end range values of selected range can be customized using Start and End property of SelectedRangeSettings.

  • cshtml
  • @(Html.EJ().RangeNavigator("container")
    
    	            // ...              
                    .SelectedRangeSettings(range=>range.Start("01/05/1992").End("01/05/1993"))                      
                       // ...             
                 )