Adaptive-Card-Editor/Adaptive Card Editor UWP/MainPage.xaml.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using AdaptiveCards.Rendering.Uwp;
using System.Threading.Tasks;

// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace Adaptive_Card_Editor_UWP
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public DispatcherTimer keyTimer = new DispatcherTimer();

        public long lastKeyUp;

        public bool isRendered;

        public long interval = 5000000;

        public MainPage()
        {
            TimerSetup();
            this.InitializeComponent();
        }

        public void TimerSetup()
        {
            keyTimer.Tick += TimerTick;
            // keyTimer.Interval = new TimeSpan(0, 0, 1);
            keyTimer.Interval = TimeSpan.Parse("00:00:00.05");
            keyTimer.Start();
        }

        private void txtInput_KeyUp(object sender, KeyRoutedEventArgs e)
        {
            // last key up event = integer value of current time
            lastKeyUp = DateTime.Now.Ticks;

            // user is inputting text, so we're going to rerender
            isRendered = false;
        }

        void TimerTick(object sender, object args)
        {
            if (isRendered)
            {
                return;
            }
            else
            {
                if (DateTime.Now.Ticks >= lastKeyUp + interval )
                {
                    // we done got some input! let's render it.
                    // we don't care what the input is; if it's not valid JSON ignore this keystroke

                    // render the text as a plain textbox
                    TextBlock txtOutput = new TextBlock();
                    txtOutput.TextWrapping = TextWrapping.Wrap;
                    txtOutput.Padding = new Thickness(10);
                    txtOutput.Text = txtInput.Text;

                    // clear the grid of existing content
                    grdCard.Children.Clear();

                    // render an adaptive card
                    try
                    {
                        AdaptiveCardRenderer cardRenderer = new AdaptiveCardRenderer();
                        AdaptiveCardParseResult parsedCard = AdaptiveCard.FromJsonString(txtInput.Text);
                        RenderedAdaptiveCard theCard = cardRenderer.RenderAdaptiveCard(parsedCard.AdaptiveCard);
                        grdCard.Children.Add(theCard.FrameworkElement);
                    }
                    catch (Exception ex)
                    {
                        txtOutput.Text = ex.ToString();
                        grdCard.Children.Add(txtOutput);
                    }
                    grdCard.UpdateLayout();

                    isRendered = true;
                }
                else
                {
                    return;
                }
            }
        }
    }
}