在绘制扩展玻璃相框一个TextBox W / O WPF

本文介绍了在绘制扩展玻璃相框一个TextBox W / O WPF的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想画我的形式的扩展玻璃框架上一个文本框。我就不一一介绍了这种技术，这是众所周知的。下面是对于那些还没有听说过谁的例子：

I am trying to draw a TextBox on the extended glass frame of my form. I won't describe this technique, it's well-known. Here's an example for those who haven't heard of it: http://www.danielmoth.com/Blog/Vista-Glass-In-C.aspx

的事情是，它是复杂的绘制在这个玻璃框架。由于黑色被认为是在0-α颜色，任何黑色消失

The thing is, it is complex to draw over this glass frame. Since black is considered to be the 0-alpha color, anything black disappears.

有明显对付这个问题的途径：绘制复杂GDI +形状并不受此阿尔法-ness。例如，该代码可以用来绘制在玻璃上的标签（注：的GraphicsPath 则使用的DrawString 的为了避开可怕的ClearType的问题）：

There are apparently ways of countering this problem: drawing complex GDI+ shapes are not affected by this alpha-ness. For example, this code can be used to draw a Label on glass (note: GraphicsPath is used instead of DrawString in order to get around the horrible ClearType problem):

public class GlassLabel : Control
{
    public GlassLabel()
    {
        this.BackColor = Color.Black;
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        GraphicsPath font = new GraphicsPath();

        font.AddString(
            this.Text,
            this.Font.FontFamily,
            (int)this.Font.Style,
            this.Font.Size,
            Point.Empty,
            StringFormat.GenericDefault);

        e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
        e.Graphics.FillPath(new SolidBrush(this.ForeColor), font);
    }
}

类似地，这样的方法可以用于创建在玻璃区域的容器。注意使用的多边形的，而不是矩形 - 利用矩形时，其黑色部分被认为是阿尔法。

Similarly, such an approach can be used to create a container on the glass area. Note the use of the polygons instead of the rectangle - when using the rectangle, its black parts are considered as alpha.

public class GlassPanel : Panel
{
    public GlassPanel()
    {
        this.BackColor = Color.Black;
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        Point[] area = new Point[]
            {
                new Point(0, 1),
                new Point(1, 0),
                new Point(this.Width - 2, 0),
                new Point(this.Width - 1, 1),
                new Point(this.Width -1, this.Height - 2),
                new Point(this.Width -2, this.Height-1),
                new Point(1, this.Height -1),
                new Point(0, this.Height - 2)
            };

        Point[] inArea = new Point[]
            {
                new Point(1, 1),
                new Point(this.Width - 1, 1),
                new Point(this.Width - 1, this.Height - 1),
                new Point(this.Width - 1, this.Height - 1),
                new Point(1, this.Height - 1)
            };

        e.Graphics.FillPolygon(new SolidBrush(Color.FromArgb(240, 240, 240)), inArea);
        e.Graphics.DrawPolygon(new Pen(Color.FromArgb(55, 0, 0, 0)), area);

        base.OnPaint(e);
    }
}

现在我的问题是：怎样绘制一个TextBox ？
经过大量谷歌搜索，我想出了以下解决方案：

Now my problem is: How can I draw a TextBox?After lots of Googling, I came up with the following solutions:

子类文本框的的OnPaint 方法。这是的可能的，虽然我不能让它正常工作。它应该包括画一些神奇的事情，我不知道该怎么办呢。

制作自己的自定义文本框，也许在 TextBoxBase 。如果任何人有的好的，有效的和工作的例子，认为这可能是一个很好的整体解决方案，请告诉我。

使用 BufferedPaintSetAlpha 。（）。这种方法的缺点可能是文本框的边角可能看起来很奇怪，但我可以忍受的。如果有人知道如何正确地实施该方法从Graphics对象，请告诉我。我个人不这样做，但这似乎最好的解决办法为止。说实话，我发现了一个伟大的C ++的文章，但我太懒惰将其转换。

Subclassing the TextBox's OnPaint method. This is possible, although I could not get it to work properly. It should involve painting some magic things I don't know how to do yet.
Making my own custom TextBox, perhaps on a TextBoxBase. If anyone has good, valid and working examples, and thinks this could be a good overall solution, please tell me.
Using BufferedPaintSetAlpha. (http://msdn.microsoft.com/en-us/library/ms649805.aspx). The downsides of this method may be that the corners of the textbox might look odd, but I can live with that. If anyone knows how to implement that method properly from a Graphics object, please tell me. I personally don't, but this seems the best solution so far. To be honest, I found a great C++ article, but I am way too lazy to convert it. http://weblogs.asp.net/kennykerr/archive/2007/01/23/controls-and-the-desktop-window-manager.aspx

请注意：如果我曾经与BufferedPaint方法成功了，我发誓S / O，我将与所有常见的Windows窗体控件可绘制在玻璃上简单的DLL

Note: If I ever succeed with the BufferedPaint methods, I swear to s/o that I will make a simple DLL with all the common Windows Forms controls drawable on glass.

推荐答案

我花了一些时间在这个话题前一阵子。基本上你需要的是一个透明的文本框。我最初的方法是使用CodeProject上文本框。但是我是有该控件的一些难以解决的问题。有一段时间我已经找到解决方案需要后，只能在Windows XP和后续工作。，以及获得这种控制表现得像单行文本框设置RichTextBox.Multiline为false

I have spent some time on this topic a while ago. Basically what you need is a transparent textbox. My initial approach was to use codeproject AlphaBlendTextBox - A transparent/translucent textbox for .NET. But I was having a few difficult to solve issues with that control. After a while I have found required solution, it will work only on Windows XP and up. As well to get this control to behave like single line text box set RichTextBox.Multiline to false.

// Source:
// http://www.dotnetjunkies.com/WebLog/johnwood/archive/2006/07/04/transparent_richtextbox.aspx

// It seems there are 4 versions of the RichEdit control out there - when I'm talking about the 
// RichEdit control, I'm talking about the C DLL that either comes with Windows or some version 
// of Office. The files are named either RICHEDXX.DLL (XX is the version number), or MSFTEDIT.DLL 
// and they're in the System32 folder.

// .Net RichTextBox control is bound to version 2. The biggest problem with this version (at least 
// for me) is that it does not render properly if you try to make the window transparent. Later versions, 
// however, do.

// We can fix that. If you create a control deriving from the original RichTextBox control, but overriding 
// the CreateParams property, you can put in a new Windows class name (this is the window class name, 
// nothing to do with classes in the C# sense). This effectively gives us a free upgrade. When the .Net 
// RichTextBox control instantiates, it will now use the latest RichEdit control and not the old, archaic, 
// version 2.

// There are other benefits too - version 3 and beyond of the RichEdit control support quite an extensive 
// array of layout features, such as tables and full text justification. This is the version of the RichEdit 
// that WordPad uses in Windows XP. To really see what it's capable of displaying you can create documents in 
// Word and save them in RTF, load these into the new RichEdit and in a lot of cases it'll look identical, 
// it's that powerful. A full list of features can be found here:
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/richedit/richeditcontrols/aboutricheditcontrols.asp

// There are a couple of caveats:
// 
// 1. The control that this is bound to was shipped with Windows XP, and so this code won't work in 
//    Windows 2000 or earlier. 
//
// 2. The RichTextBox control in C# only knows about version 2, so the interface doesn't include 
//    all the new features. You can wrap a few of the features yourself through new methods on the 
//    RichEdit class.

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

internal class RichEdit : RichTextBox
{

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    private static extern IntPtr LoadLibrary(string lpFileName);

    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams parameters = base.CreateParams;
            if (LoadLibrary("msftedit.dll") != IntPtr.Zero)
            {
                parameters.ExStyle |= 0x020; // transparent
                parameters.ClassName = "RICHEDIT50W";
            }
            return parameters;
        }
    }
}

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