Commands
TimeSpanPicker Commands
TimeSpan Picker for Xamarin exposes the following commands you can use to programmatically manipulate displaying the popup as well as clearing the selected time interval:
- ToggleCommand(ICommand): Allows you to show/hide the popup used for selecting a time interval.
- ClearCommand(ICommand): Allows you to clear the displayed time interval.
Example for ToggleCommand and ClearCommand
<StackLayout>
<Button Text="Toggle Command" Command="{Binding Source={x:Reference timeSpanPicker}, Path=ToggleCommand}"/>
<Button Text="Clear Command" Command="{Binding Source={x:Reference timeSpanPicker}, Path=ClearCommand}"/>
<telerikInput:RadTimePicker x:Name="timeSpanPicker" />
</StackLayout>
also you need to add the following namespace:
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"
PopupSelector Commands
Through the popup users can pick a time interval. The time interval value should be confirmed or rejected through the OK and Cancel buttons placed on the popup.
TimeSpan Picker allows you to add a custom logic for the Accept and Cancel commands which are executed when OK and Cancel buttons, respectively, are pressed.
- AcceptCommand(ICommand): Defines the command which confirms the current selection of the picker and closes the popup. AcceptCommandParameter can be used to pass a parameter to the command execute method.
- CancelCommand(ICommand): Defines the command which rejects the current selection of the picker and closes the popup. CancelCommandParameter can be used to pass a parameter to the command execute method.
The Accept and Cancel commands can be applied using the SelectorSettings property of RadTimeSpanPicker. In addition, you can pass command parameters through the AcceptCommandParameter and CancelCommandParameter properties of the TimeSpanPicker SelectorSettings.
Here is a quick example on how they could be set:
Example for AcceptCommand and CancelCommand
<telerikInput:RadTimeSpanPicker x:Name="timeSpanPicker">
<telerikInput:RadTimeSpanPicker.SelectorSettings>
<telerikInput:PickerPopupSelectorSettings AcceptCommand="{Binding Accept}"
AcceptCommandParameter="{Binding Time, Source={x:Reference timeSpanPicker}}"
CancelCommand="{Binding Cancel}"
CancelCommandParameter="{Binding Time, Source={x:Reference timeSpanPicker}}"/>
</telerikInput:RadTimeSpanPicker.SelectorSettings>
<telerikInput:RadTimeSpanPicker.BindingContext>
<local:ViewModel/>
</telerikInput:RadTimeSpanPicker.BindingContext>
</telerikInput:RadTimeSpanPicker>
and the ViewModel
public class ViewModel
{
public ICommand Accept { get; set; }
public ICommand Cancel { get; set; }
public ViewModel()
{
this.Accept = new Command(this.OnAccept);
this.Cancel = new Command(this.OnCancel);
}
private void OnAccept(object param)
{
Application.Current.MainPage.DisplayAlert("Time Interval selected", "New time interval: " + (TimeSpan)param, "OK");
// implement your custom logic here
}
private void OnCancel(object param)
{
var message = param != null ? "Current time interval: " + (TimeSpan)param : "Currently no time interval is selected";
Application.Current.MainPage.DisplayAlert("Time Interval Selection Canceled", message, "OK");
// implement your custom logic here
}
}
also you need to add the following namespace:
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"