Question

在WinForms（最好的C＃）中，我怎么能做一个简单的＆＃34;缩放＆＃34;工具在光标位置下方显示矩形视图？理想情况下，只放大控件（按钮，标签......）

虽然，首先，这可能与标准库（.dll）有关吗？我是处理图形的新手...

提前致谢！

编辑：此问题/答案（Zoom a Rectangle in .NET）对待缩放图像，而不是输入控件。我只是想放大控件。

Edit2：通过每个控件的MouseEnter事件，我定位一个面板，该面板应该包含放大的控件图像。我只在正确的网站上获得了这个小组......

private void anyControl_MouseEnter(object sender, EventArgs e)
{
    Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, 
                     Screen.PrimaryScreen.Bounds.Height);
    //Create the Graphic Variable with screen Dimensions
    Graphics graphics = Graphics.FromImage(printscreen as Image);
    //Copy Image from the screen
    graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);

    Control auxControl = (Control) sender;
    panel.Width = auxControl + 20;
    panel.Height = auxControl + 20;
    panel.Location = new Point (auxControl.Location.X - 10, auxControl.Location.Y - 10);

    control.DrawToBitmap(printscreen, panel.Bounds)
}

Answer 1

您可以使用此代码从屏幕上获取图片（感谢http://www.codeproject.com/Articles/485883/Create-your-own-Snipping-Tool）：

Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, 
                         Screen.PrimaryScreen.Bounds.Height);
//Create the Graphic Variable with screen Dimensions
Graphics graphics = Graphics.FromImage(printscreen as Image);
//Copy Image from the screen
graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);

所以使用此链接和您分享的链接应该排序

如果您不热衷于捕获屏幕部分，请使用表单的DrawToBitmap方法（感谢Capture screenshot of only a section of a form?）

Answer 2

使用以下代码我解决了我的问题，但最终的图像有些模糊......（我＆＃34;缩放＆＃34;图像为20％）

 private void anyControl_MouseEnter(object sender, EventArgs e)
 {

    Control auxControl = (Control) sender;

    int enlargedWidth = (int) Math.Round(auxControl.Width * 1.20);
    int enlargedHeight = (int) Math.Round(auxControl.Height * 1.20);

    panel.Width = enlargedWidth;
    panel.Height = enlargedHeight;
    panel.Location = new Point (auxControl.Location.X - (int) Math.Round(auxControl.Width * 0.10), auxControl.Location.Y - (int) Math.Round(auxControl.Height * 0.10));

    Bitmap aBitmap = new System.Drawing.Bitmap(auxControl.Width, auxControl.Height);
    auxControl.DrawToBitmap(aBitmap, auxControl.ClientRectangle);

    Bitmap aZoomBitmap = ZoomImage(aBitmap, panel.Bounds);
    panel.ContentImage = aZoomBitmap;

    panel.Visible = true;
 }

 private Bitmap ZoomImage(Bitmap pBmp, Rectangle pDestineRectangle)
 {

    Bitmap aBmpZoom = new Bitmap(pDestineRectangle.Width, pDestineRectangle.Height);
    Graphics g = Graphics.FromImage(aBmpZoom);
    Rectangle srcRect = new Rectangle(0, 0, pBmp.Width, pBmp.Height);
    Rectangle dstRect = new Rectangle(0, 0, aBmpZoom.Width, aBmpZoom.Height);
    g.DrawImage(pBmp, dstRect, srcRect, GraphicsUnit.Pixel);

    return aBmpZoom;
 }

.NET中的简单缩放工具

2 个答案: