Is it possible to drag to down panel slider using xamarin forms?

Question

I\'m new in xamamrin forms anyone helps me about drag to down panel slider. I want to drag to down slider in android using xamarin forms mentioned in image

Any hav

Answer 1

There are many way to implement a sliding panel, I provide one of them which using a PanGestureRecognizer :

in xaml

in code behind

using System.ComponentModel;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace App10
{
    // Learn more about making custom code visible in the Xamarin.Forms previewer
    // by visiting https://aka.ms/xamarinforms-previewer
    [DesignTimeVisible(false)]
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();        
        }

        double? layoutHeight;
        double layoutBoundsHeight;
        int direction;
        const double layoutPropHeightMax = 0.75;
        const double layoutPropHeightMin = 0.04;
        void PanGestureHandler(object sender, PanUpdatedEventArgs e)
        {
            layoutHeight = layoutHeight ?? ((sender as StackLayout).Parent as AbsoluteLayout).Height;
            switch (e.StatusType)
            {
                case GestureStatus.Started:
                    layoutBoundsHeight = AbsoluteLayout.GetLayoutBounds(sender as StackLayout).Height;
                    break;
                case GestureStatus.Running:
                    direction = e.TotalY > 0 ? 1 : -1;
                    break;
                case GestureStatus.Completed:
                    if (direction > 0) 
                    {
                        Device.BeginInvokeOnMainThread(async() =>
                        {

                            var height = layoutPropHeightMin;

                            while (height < layoutPropHeightMax)
                            {
                               await Task.Delay(2);
                                height += 0.04;

                                AbsoluteLayout.SetLayoutBounds(bottomDrawer, new Rectangle(0.5, 0.00, 0.9, height));
                            }

                        });
                      
                    }
                    else
                    {
                        Device.BeginInvokeOnMainThread(async () =>
                        {

                            var height = layoutPropHeightMax;

                            while (height > layoutPropHeightMin)
                            {
                                await Task.Delay(2);
                                height -= 0.04;

                                AbsoluteLayout.SetLayoutBounds(bottomDrawer, new Rectangle(0.5, 0.00, 0.9, height));
                            }

                        });
                    }
                    break;
            }
        }
    }
}