App_win_iot_V2.0/IOTContainer/View/MarqueeControl.xaml.cs

using IOTContainer.Common;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace IOTContainer.View
{
    /// <summary>
    /// MarqueeControl.xaml 的交互逻辑
    /// </summary>
    public partial class MarqueeControl : UserControl
    {
        Storyboard std = null;
        DoubleAnimation animation = null;
      
        int Speed = 150;
        string showText = string.Empty;
        public MarqueeControl()
        {
            InitializeComponent();
        }
        public void Load(string text, double width, double height, string fontSize, string backgroundColor, int? backgroundOpacity, string fontColor, string fontStyle, string animationSpeed)
        {
            try
            {
                std = (Storyboard)canvas.Resources["stdLeft"];
                this.Height = height;
                this.Width = width;
                canvas.Width = width;
                canvas.Height = height;
                content.Height = height;
                canvas.VerticalAlignment = VerticalAlignment.Center;
                content.VerticalAlignment = VerticalAlignment.Center;


                txtItem.FontSize = Convert.ToDouble(fontSize);
                BrushConverter converter = new BrushConverter();
                if (!string.IsNullOrEmpty(backgroundColor))
                {
                    SolidColorBrush brush = (SolidColorBrush)converter.ConvertFromString(backgroundColor);
                    if (backgroundOpacity != null)
                    {
                        brush.Opacity = backgroundOpacity.Value / 100.0;
                    }

                    canvas.Background = brush;
                }

                if (!string.IsNullOrEmpty(fontColor))
                {
                    Brush newFill = (Brush)converter.ConvertFromString(fontColor);
                    txtItem.Foreground = newFill;
                }
                if (!string.IsNullOrEmpty(fontStyle))
                {
                    switch (fontStyle)
                    {
                        case "正常":
                            txtItem.FontStyle = FontStyles.Normal;
                            break;
                        case "加粗":
                            txtItem.FontWeight = FontWeights.Bold;
                            break;
                        case "斜体":
                            txtItem.FontStyle = FontStyles.Italic;
                            break;
                        case "加粗、斜体":
                            txtItem.FontStyle = FontStyles.Italic;
                            txtItem.FontWeight = FontWeights.Bold;
                            break;
                        default:
                            break;
                    }
                }
                if (!string.IsNullOrEmpty(animationSpeed))
                {
                    switch (animationSpeed)
                    {
                        case "慢":
                            Speed = 50;
                            break;
                        case "中等":
                            Speed = 90;
                            break;
                        case "快":
                            Speed = 130;
                            break;
                        case "很快":
                            Speed = 180;
                            break;
                        default:
                            Speed = 90;
                            break;
                    }
                }
                animation = (DoubleAnimation)std.Children[0];
                std.Completed += (t, r) => changeItem();
                showText = text;
                std.Completed += delegate
                {
                    if (txtItem.Visibility != Visibility.Visible)
                    {
                        txtItem.Visibility = Visibility.Visible;
                        txtItem.Text = showText;
                    }

                };
                changeItem();
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile("Load：" + ex.ToString(), "MarqueeControl");
            }
        }
        private void changeItem()
        {
            try
            {
                txtItem.Text = showText;
                txtItem.UpdateLayout();

                double canvasWidth = canvas.ActualWidth;
                double canvasHeight = canvas.ActualHeight;
                double txtWidth = txtItem.ActualWidth;
                double txtHeight = txtItem.ActualHeight;

                animation.From = canvasWidth;
                animation.To = -txtWidth;

                int time = 0;

                time = (int)((canvasWidth + txtWidth) / Speed);
                if (time < 2) time = 2;
                animation.Duration = new Duration(new TimeSpan(0, 0, time));

                if (std != null)
                {
                    std.Begin();
                }
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile("Load：" + ex.ToString(), "MarqueeControl");
            }
        }

        public void Dispose()
        {
            std.Stop();
            std.Children.Clear();
        }
    }
}