Silverlight3.0 使用墨迹画笔InkPresenter

    InkPresenter称为墨迹控件,它支持的输入设备有, 手写笔输入,触摸板和鼠标输入.其使用方法非常简单.只需添加 InkPresenter控件,并保存InkPresenter的Storkes对象即可.

XAML代码如下:

<Grid x:Name="LayoutRoot" Background="White">
		<InkPresenter x:Name="IP" Margin="0,8,8,8"
                      MouseMove="IP_MouseMove" LostMouseCapture="IP_LostMouseCapture" 
                      MouseLeftButtonDown="IP_MouseLeftButtonDown">
			<InkPresenter.Background>
				<ImageBrush ImageSource="4.jpg" Stretch="Fill"/>
			</InkPresenter.Background>
		</InkPresenter>
	</Grid>

C#后台代码如下:

//定义一个画笔
        private Stroke myStroke;
        private void IP_MouseMove(object sender, MouseEventArgs e)
        {
            if (myStroke != null)
            {
                //当鼠标移动时如果画笔不为空就继续添加,新的坐标点到StylusPoints集合
                myStroke.StylusPoints.Add(e.StylusDevice.GetStylusPoints(IP));
            }
        }

        private void IP_LostMouseCapture(object sender, MouseEventArgs e)
        {
            myStroke = null;
        }

        private void IP_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            //墨迹画笔捕获鼠标
            IP.CaptureMouse();
            //创建画笔做标集合SPC
            StylusPointCollection SPC = new StylusPointCollection();
            //将当前IP对象的坐标集合添加到SPC
            SPC.Add(e.StylusDevice.GetStylusPoints(IP));
            //将坐标添加到画笔对象
            myStroke = new Stroke(SPC);
            //墨迹尺寸
            myStroke.DrawingAttributes.Width = 10;
            myStroke.DrawingAttributes.Height = 10;
            //墨迹颜色
            myStroke.DrawingAttributes.Color = Colors.White;
            //将画笔对象添加到IP的画笔集合中
            IP.Strokes.Add(myStroke);
        }

效果图：

哦哦,字写的不好看,大家凑合看吧…

阳光明媚..哈哈