ItemToolTipOpening is never been called

[Markus Demmler]

Hello,
I am trying to setup a data drill down simiar to the provided example. But I am facing the problem that the ItemToolTipOpening event is not fired when I place the mouse on a chart point.
Here is the code that I am using:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Telerik.Windows.Controls.Charting;
using AppointmentScheduler;
using Telerik.Windows.Data;
using System.Globalization;
using Telerik.Windows.Controls;

namespace AppointmentSchedulerUI
{
    /// <summary>
    /// Interaction logic for ChartWorkingHours.xaml
    /// </summary>
    public partial class ChartWorkingHours : Window
    {
        private AppointmentScheduler.AppointmentScheduler m_AppointmentScheduler;
        private Dictionary<string, Employee> m_Employees;


        public ChartWorkingHours(Dictionary<string, Employee> employees, AppointmentScheduler.AppointmentScheduler appointmentScheduler)
        {
            m_AppointmentScheduler = appointmentScheduler;
            m_Employees = employees;

            InitializeComponent();
            CountriesBox.ItemsSource = employees.Values;

            m_CB_Year.ItemsSource = new int[]{2009, 2010, 2011, 2012};

            List<string> monthNames = new List<string>();
            monthNames.Add("Komplettes Jahr");
            for (int i=1; i<=12; i++)
                monthNames.Add(CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(i));
            m_CB_Month.ItemsSource = monthNames;

            m_RadChart.DefaultView.ChartLegend.Header = "";
            m_RadChart.DefaultView.ChartLegendPosition = Dock.Bottom;

            SeriesMapping seriesMapping1 = new SeriesMapping();
            seriesMapping1.LegendLabel = "Abgerechnete Arbeitsstunden";
            seriesMapping1.SeriesDefinition = new BarSeriesDefinition();
            ItemMapping itemMapping1 = new ItemMapping();
            itemMapping1.DataPointMember = DataPointMember.YValue;
            itemMapping1.FieldName = "WorkedHours";
            ItemMapping itemMapping2 = new ItemMapping();
            itemMapping2.DataPointMember = DataPointMember.XCategory;
            itemMapping2.FieldName = "ShortName";
            seriesMapping1.ItemMappings.Add(itemMapping1);
            seriesMapping1.ItemMappings.Add(itemMapping2);
            m_RadChart.SeriesMappings.Add(seriesMapping1);

            SeriesMapping seriesMapping2= new SeriesMapping();
            seriesMapping2.LegendLabel = "Bezahlte Arbeitsstunden";
            seriesMapping2.SeriesDefinition = new BarSeriesDefinition();
            ItemMapping itemMapping3 = new ItemMapping();
            itemMapping3.DataPointMember = DataPointMember.YValue;
            itemMapping3.FieldName = "PaidHours";
            ItemMapping itemMapping4 = new ItemMapping();
            itemMapping4.DataPointMember = DataPointMember.XCategory;
            itemMapping4.FieldName = "ShortName";
            seriesMapping2.ItemMappings.Add(itemMapping3);
            seriesMapping2.ItemMappings.Add(itemMapping4);
            m_RadChart.SeriesMappings.Add(seriesMapping2);

            m_CB_Year.SelectedItem = DateTime.Now.Year;
            m_CB_Month.SelectedIndex = 0;
            m_CB_Year.SelectionChanged +=new SelectionChangedEventHandler(TimeSpanModified);
            m_CB_Month.SelectionChanged += new SelectionChangedEventHandler(TimeSpanModified);

            m_RadChart.DefaultView.ChartArea.ItemToolTipOpening += this.ChartItemToolTipOpening;

            UpdateData();
        }





        private void ChartItemToolTipOpening(ItemToolTip2D tooltip, ItemToolTipEventArgs args)
        {
            RadChart chart = new RadChart();
            chart.Height = 200;
            chart.Width = 300;

            chart.DefaultView.ChartLegend.Visibility = System.Windows.Visibility.Collapsed;
            chart.DefaultView.ChartArea.AxisX.LayoutMode = AxisLayoutMode.Inside;
            string axisItemLabel = m_RadChart.DefaultView.ChartArea.AxisX.TickPoints[args.ItemIndex].Label;
            chart.DefaultView.ChartTitle.Content = string.Format("Quarterly Preview: {0}", axisItemLabel);

            chart.DefaultView.ChartArea.AxisY.DefaultLabelFormat = "C";

            DataSeries series = new DataSeries();
            series.Definition = new LineSeriesDefinition();
            series.Definition.ShowItemLabels = false;
            //SeriesExtensions.FillWithSampleData(series, 4, (int)args.DataPoint.YValue);

            string[] quarters = new string[] { "Q1", "Q2", "Q3", "Q4" };

            for (int i = 0; i < chart.DefaultView.ChartArea.AxisX.TickPoints.Count; i++)
                series[i].XCategory = quarters[i];

            //for (int i = 0; i < series.Count; i++)
            //    quarterlyRevenues[i] = series[i].YValue;

            chart.DefaultView.ChartArea.DataSeries.Add(series);

            tooltip.Content = chart;
        }





        private void UpdateData()
        {
            int selectedYear = (int)m_CB_Year.SelectedItem;
            string selectedMonthString = (string)m_CB_Month.SelectedItem;
            bool wholeYear = false;
            int selectedMonth = 0;
            if (selectedMonthString == "Komplettes Jahr")
                wholeYear = true;
            else
                selectedMonth = DateTime.ParseExact(selectedMonthString, "MMMM", CultureInfo.CurrentCulture).Month;

            DateTime startTime;
            DateTime endTime;
            if (wholeYear)
            {
                startTime = new DateTime(selectedYear, 1, 1);
                endTime = new DateTime(selectedYear + 1, 1, 1);
            }
            else
            {
                startTime = new DateTime(selectedYear, selectedMonth, 1);
                endTime = new DateTime(selectedYear, selectedMonth, 1).AddMonths(1);
            }

            List<ChartData> chartData = new List<ChartData>();
            foreach (Employee emp in m_Employees.Values)
            {
                double workedHours = m_AppointmentScheduler.GetWorkedHours(startTime, endTime, emp);
                double paidHours = m_AppointmentScheduler.GetPaidHours(startTime, endTime, emp);
                chartData.Add(new ChartData(emp.FirstName, emp.LastName, workedHours, paidHours));
            }

            m_RadChart.ItemsSource = chartData;
        }

        private void CheckBox_Checked(object sender, RoutedEventArgs e)
        {
            CheckBox sourceCheckbox = e.OriginalSource as CheckBox;
            Queue<ChartFilterDescriptor> filtersToRemove = new Queue<ChartFilterDescriptor>();

            foreach (ChartFilterDescriptor descriptor in m_RadChart.FilterDescriptors)
            {
                if (descriptor.Value.Equals(sourceCheckbox.Content))
                    filtersToRemove.Enqueue(descriptor);
            }

            foreach (ChartFilterDescriptor descriptor in filtersToRemove)
                m_RadChart.FilterDescriptors.Remove(descriptor);

        }

        private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
        {
            CheckBox sourceCheckbox = e.OriginalSource as CheckBox;
            m_RadChart.FilterDescriptors.Add(new ChartFilterDescriptor("FullName", typeof(string), FilterOperator.IsNotEqualTo, sourceCheckbox.Content));
        }

        private void TimeSpanModified(object sender, SelectionChangedEventArgs e)
        {
            UpdateData();
        }
    }
}

I am custom classes which are connected via SeriesMapping.

Best regards,
Markus Demmler

[Markus Demmler]

Comparing it with the provided examples, I found out that I am missing something like:

series.Definition.ShowItemToolTips = true;

But I don't know how I could use that as I am using SeriesMapping and not DataSeries directly.
Any suggestions?

Best regards,
Markus Demmler

[Velin]

Hello Markus Demmler,

Here is an excerpt from the code you provided which I modified in order to enable tooltips in your scenario. You should apply the changes to all the SeriesMapping objects you have:

SeriesMapping seriesMapping1 = new SeriesMapping();
seriesMapping1.LegendLabel = "Abgerechnete Arbeitsstunden";
seriesMapping1.SeriesDefinition = new BarSeriesDefinition(){ ShowItemToolTips = true};

Greetings,
Velin
the Telerik team

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[Markus Demmler]

Solved the problem.
Thanks a lot for your help!

Markus

[Anitha]

If we are using  

 

ShowItemToolTips

 

 

="True"

the tooltip value is visible thorughout the line, I want to show the value as tooltip only at the data point not on the total line.

 

 

 

 

 

 

Thanks in Advance