这是一个WinForm代码
Fragment_1 fragment = (Fragment_1) getSupportFragmentManager().findFragmentById(R.layout.fr1);
fragment.updateSearchView();
我需要在我的UWP应用中转换它。但是，我可以使用WriteableBitmap代替Bitmap和SolidColorBrush代替Pen。但是对于Graphics类应该是什么。
如果我将图形视为WriteableBitmap，除了以下这些线之外，无论如何一切都解决了
private EasyScript eScript;
/// <summary>
/// Graphics object we'll draw on to in order to produce a signature
/// image.
/// </summary>
private Graphics graphics;
/// <summary>
/// Raster backing the graphics object.
/// </summary>
private Bitmap raster;
/// <summary>
/// Pen we'll use to create strokes on our graphics object.
/// </summary>
private Pen pen;
/// <summary>
/// The last point we captured.
/// </summary>
private Coordinate lastPoint = null;
/// <summary>
/// Whether or not the next event we receive should clear the signature.
/// </summary>
private bool clearOnNext = false;
/// <summary>
/// The current stroke count.
/// </summary>
private int strokeCount = 0;
/// <summary>
/// The amount to scale the coordinates by.
/// </summary>
private double scaleFactor = 1;
/// <summary>
/// Initializes a new instance of the <see cref="ExampleForm"/> class.
/// </summary>
public ExampleForm()
{
//Create a new EasyScript object.
this.eScript = new EasyScript();
//Register ourselves as a signature listener.
eScript.AddListener(this);
//Initialize our form.
this.InitializeComponent();
//Initialize our drawing components.
raster = new Bitmap(signaturePictureBox.Width, signaturePictureBox.Height);
graphics = Graphics.FromImage(raster);
//Enable high quality drawing.
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
pen = new Pen(Brushes.Black);
//Calculate our scale factor based on the size of the picture box.
scaleFactor = signaturePictureBox.Width / eScript.GetSignatureProtocol().GetWidth();
//Clear the picture box.
ClearSignatureBox();
// this allows the form to preview all keyboard events before other parts of the form are allowed
// to get them. If a particular keyboard event is from a ScripTouch device,
// we can prevent the event from propogating to other form elements, such as a TextBox.
this.KeyPreview = true;
this.cardSwipeInfoTextBox.ReadOnly = true;
this.signatureInfoTextBox.ReadOnly = true;
}
和
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality; graphics.SmoothingMode = SmoothingMode.AntiAlias;
和
graphics.FillRectangle(Colors.White, 0, 0, signature.Width, signature.Height);
签名是我的图像对象。
提前致谢。
答案 0 :(得分：2)
System.Drawing命名空间下的Graphics类更像CanvasDrawingSession类Win2D。 Win2D是一款易于使用的Windows运行时API，可用于UWP应用程序的GPU加速即时模式2D图形渲染。
例如，对于graphics.InterpolationMode媒体资源，您可以尝试使用CanvasImageInterpolation。 CanvasDrawingSession的{{3}}属性定义了与SmoothingMode类似的功能。 CanvasDrawingSession还提供了Graphics和Antialiasing方法，如上所示README.md。
因此，您可以尝试在UWP应用程序中使用Win2D库来实现相同的功能。有关如何使用Win2D的更多详细信息，请参考FillRectangle的 1:23:0.20
2:34:0.50
3:67:0.90
4:87:0.10
5:23:0.12
，有关示例，请参阅Drawline。
答案 1 :(得分：0)
尝试使用WritableBitmapEx库 https://www.nuget.org/packages/WriteableBitmapEx
您可以使用nuget将此软件包添加到您的项目中。
使用WritableBitmapEx，可以很容易地直接在图像上绘制多边形，形状，线条等。
例如 bmp.DrawRectangle（cornerPoints [0] .X，cornerPoints [0] .Y，cornerPoints [2] .X，cornerPoints [2] .Y，Colors.Red）;
您可以在github上使用WritableBitmapEx找到大量的绘图示例 https://github.com/reneschulte/WriteableBitmapEx