ToolTips

Custom ToolTips for tasks

Note: This is illustrated in sample "Appearance\GanttControlCustomAppearance".

The GanttControl lets you to easily customize the look and feel of the tooltips that get displayed for each task bar.

First define a IValueConverter where you can convert a "IActivityView" instance to a ToolTip Content:

// Custom ToolTip content provider

public class ActivityViewToToolTipContentConverter : IValueConverter

{

#region IValueConverter Members

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

IActivityView view = value as IActivityView;

// Return a UI Element that will be the content for the tooltip:

// To get hold of the IActivity instance.

// view.Activity;

// To get hold of the data source (TaskInfo, in this case) bound to this activity:

// TaskInfo ti = ((DataBoundActivity)view.Activity).DataSource as TaskInfo;

Grid grid = new Grid();

TextBlock tb = new TextBlock();

tb.Text = view.Activity.Description;

grid.Children.Add(tb);

return grid;

}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

throw new NotImplementedException();

}

#endregion

}

Then in your XAML resource:

<local:ActivityViewToToolTipContentConverter x:Key="tooltipConverter"></local:ActivityViewToToolTipContentConverter>

And refer to the above resource in the ToolTipContentBinding property of the GanttControl:

<gantt:GanttControl x:Name="ganttControl"

ToolTipContentBinding="{Binding Converter={StaticResource tooltipConverter}}"