MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Muchinfo.WPF.Controls/Zoom/ZoomFontText.cs

using System.Windows;
using System.Windows.Controls;

namespace Muchinfo.WPF.Controls.Zoom
{
    /// <summary>
    /// Class ZoomFontText.
    /// </summary>
    public class ZoomFontText : Control
    {
        static ZoomFontText()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(ZoomFontText), new FrameworkPropertyMetadata(typeof(ZoomFontText)));
        }


        public double FontCount
        {
            get { return (double)GetValue(FontCountProperty); }
            set { SetValue(FontCountProperty, value); }
        }

        // Using a DependencyProperty as the backing store for FontCount.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty FontCountProperty =
            DependencyProperty.Register("FontCount", typeof(double), typeof(ZoomFontText), new PropertyMetadata(2d));




        /// <summary>
        /// 放大倍数
        /// </summary>
        public double ZoomFontSize
        {
            get { return (double)GetValue(ZoomFontSizeProperty); }
            set { SetValue(ZoomFontSizeProperty, value); }
        }

        // Using a DependencyProperty as the backing store for ZoomSize.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty ZoomFontSizeProperty =
            DependencyProperty.Register("ZoomFontSize", typeof(double), typeof(ZoomFontText), new PropertyMetadata(2d));


        public string NormalText
        {
            get { return (string)GetValue(NormalTextProperty); }
            set { SetValue(NormalTextProperty, value); }
        }

        // Using a DependencyProperty as the backing store for NormalText.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty NormalTextProperty =
            DependencyProperty.Register("NormalText", typeof(string), typeof(ZoomFontText), new PropertyMetadata(""));


        /// <summary>
        /// 放大文本
        /// </summary>
        public string ZoomText
        {
            get { return (string)GetValue(ZoomTextProperty); }
            set { SetValue(ZoomTextProperty, value); }
        }

        // Using a DependencyProperty as the backing store for ZoomText.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty ZoomTextProperty =
            DependencyProperty.Register("ZoomText", typeof(string), typeof(ZoomFontText), new PropertyMetadata(""));


        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        // Using a DependencyProperty as the backing store for Text.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty TextProperty =
            DependencyProperty.Register("Text", typeof(string), typeof(ZoomFontText), new PropertyMetadata("", OnTextChange));

        private static void OnTextChange(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var self = d as ZoomFontText;
            if (self == null) return;

            // SetViewBoxWidthHeight(self);

            var text = e.NewValue as string;
            if (string.IsNullOrWhiteSpace(text)) return;
            if (text.Length < self.FontCount)
            {
                self.NormalText = text;
                self.ZoomText = string.Empty;
                return;
            }
            self.NormalText = text.Substring(0, text.Length - (int)self.FontCount);
            self.ZoomText = text.Substring(text.Length - (int)self.FontCount);
        }

    }
}