Views/WorkSpaceView.xaml.cs

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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.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MahAppsMetro.Demo.Views
{
    /// <summary>
    /// Interaction logic for WorkSpaceView.xaml
    ///  放大缩小
    ///  左右平移
    ///  
    /// </summary>
    public partial class WorkSpaceView : UserControl
    {

        public WorkSpaceView()
        {
            InitializeComponent();
        }

        private void Border_MouseMove(object sender, MouseEventArgs e)
        {
            // 判断左键是否按下
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                //声明DataObject,并打包圆控件的图像绘制方式(包含颜色)、高度及其副本。
                DataObject data = new DataObject();
                data.SetData(DataFormats.StringFormat, "rectangle");

                //使用DragDrop的DoDragDrop方法开启拖动功能。拖动方式为拖动复制或移动
                DragDrop.DoDragDrop(this, data, DragDropEffects.Copy | DragDropEffects.Move);
            }
        }

        private void VisualCanvas_Drop(object sender, DragEventArgs e)
        {
            Point p = e.GetPosition(canvas);
            //检查数据是否包含制定字符串类型数据
            if (e.Data.GetDataPresent(DataFormats.StringFormat))
            {
                //获取字符串
                string dataString = (string)e.Data.GetData(DataFormats.StringFormat);
                switch (dataString)
                {
                    case "rectangle":
                        canvas.CreateRectangle(p);
                        break;
                }
            }