SyncfusionExamples / handle-visibility-drag-indicator-listview-xamarin

This repository contains sample about how to show or hide drag indicator based on the DragStartMode in Xamarin.Forms ListView (SfListView)

How to show or hide drag indicator based on the DragStartMode in Xamarin.Forms ListView (SfListView)

You can handle the DragIndicatorView visibility based on DragStartMode by using the converter in the Xamarin.Forms SfListView.

You can also refer the following article.

https://www.syncfusion.com/kb/11425/how-to-show-or-hide-drag-indicator-based-on-the-dragstartmode-in-xamarin-forms-listview

XAML

Set the converter to the IsVisible property of DragIndicatorView.

<syncfusion:SfListView x:Name="listView" Grid.Row="1" ItemSize="60" BackgroundColor="#FFE8E8EC" GroupHeaderSize="50" ItemsSource="{Binding ToDoList}" DragStartMode="OnHold" SelectionMode="None">
    <syncfusion:SfListView.ItemTemplate>
        <DataTemplate>
            <Frame HasShadow="True" BackgroundColor="White" Padding="0">
                <Frame.InputTransparent>
                    <OnPlatform x:TypeArguments="x:Boolean" Android="True" WinPhone="False" iOS="False"/>
                </Frame.InputTransparent>
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="60" />
                    </Grid.ColumnDefinitions>
                    <Label x:Name="textLabel" Text="{Binding Name}" FontSize="15" TextColor="#333333" VerticalOptions="Center" HorizontalOptions="Start" Margin="5,0,0,0" />
                    <syncfusion:DragIndicatorView Grid.Column="1" ListView="{x:Reference listView}" HorizontalOptions="Center" VerticalOptions="Center" IsVisible="{Binding DragStartMode, Source={x:Reference listView},Converter={StaticResource dragValueConverter}}">
                        <Grid Padding="10, 20, 20, 20">
                            <Image Source="DragIndicator.png" VerticalOptions="Center" HorizontalOptions="Center" />
                        </Grid>
                    </syncfusion:DragIndicatorView>
                </Grid>
            </Frame>
        </DataTemplate>
    </syncfusion:SfListView.ItemTemplate>
</syncfusion:SfListView>

C#

Converter to return true or false based on the DragStartMode.

namespace ListViewXamarin
{
    public class DragValueConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var dragMode = (DragStartMode)value;
            if (dragMode == DragStartMode.OnHold || dragMode == DragStartMode.OnDragIndicator)
                return true;
            else
                return false;
        }
 
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}