LunarMind/Commands/PrintDocument.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Input;
using System.Windows;
using System.Windows.Controls;
using SHomeWorkshop.LunarMind.Dialogs;
using System.Windows.Media.Imaging;
using System.Windows.Media;
using System.Windows.Documents;

namespace SHomeWorkshop.LunarMind.Commands
{
    /// <summary>
    /// 打印文档命令。此命令总是可以运行的。
    /// </summary>
    public static class PrintDocumentCommand
    {
        private static RoutedUICommand routedUICmd;//创建私有字段

        public static RoutedUICommand RoutedUICmd//创建只读静态属性
        {
            get { return routedUICmd; }
        }

        static PrintDocumentCommand()//类型构造器
        {
            routedUICmd = new RoutedUICommand(
                "PrintDocumentCommand",
                "PrintDocumentCommand",
                typeof(PrintDocumentCommand),//创建RoutedUICommand对象
                null/*new InputGestureCollection() 
                { 
                    new KeyGesture(Key.P,ModifierKeys.Control,"Ctrl+P")
                }*/);

            cmdBinding.Command = routedUICmd;
            cmdBinding.CanExecute += new CanExecuteRoutedEventHandler(cmdBinding_CanExecute);
            cmdBinding.Executed += new ExecutedRoutedEventHandler(cmdBinding_Executed);
        }

        private static CommandBinding cmdBinding = new CommandBinding();

        public static CommandBinding CmdBinding
        {
            get { return cmdBinding; }
        }

        static void cmdBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            PrintDocument();
        }

        internal static void PrintDocument()
        {
            System.Windows.Media.Imaging.RenderTargetBitmap rtb = new RenderTargetBitmap(
                    (int)(Globals.MainWindow.mainCanvas.ActualWidth * 3.125),
                    (int)(Globals.MainWindow.mainCanvas.ActualHeight * 3.125),
                    300, 300, PixelFormats.Pbgra32);//300÷96=3.125//用来打印的图片分辨率要高些。96DPI只适合屏幕显示。