GraphicsUnit GraphicsUnit GraphicsUnit GraphicsUnit Enum

定义

指定给定数据的度量单位。Specifies the unit of measure for the given data.

public enum class GraphicsUnit
public enum GraphicsUnit
type GraphicsUnit = 
Public Enum GraphicsUnit
继承

字段

Display Display Display Display 1

指定显示设备的度量单位。Specifies the unit of measure of the display device. 通常,视频显示使用的单位是像素;打印机使用的单位是 1/100 英寸。Typically pixels for video displays, and 1/100 inch for printers.

Document Document Document Document 5

将文档单位(1/300 英寸)指定为度量单位。Specifies the document unit (1/300 inch) as the unit of measure.

Inch Inch Inch Inch 4

将英寸指定为度量单位。Specifies the inch as the unit of measure.

Millimeter Millimeter Millimeter Millimeter 6

将毫米指定为度量单位。Specifies the millimeter as the unit of measure.

Pixel Pixel Pixel Pixel 2

将设备像素指定为度量单位。Specifies a device pixel as the unit of measure.

Point Point Point Point 3

将打印机点(1/72 英寸)指定为度量单位。Specifies a printer's point (1/72 inch) as the unit of measure.

World World World World 0

将世界坐标系单位指定为度量单位。Specifies the world coordinate system unit as the unit of measure.

示例

下面的代码示例演示如何Icon GraphicsUnit使用枚举从句柄加载位图, Round并使用方法来绘制位图的矩形边界。The following code example demonstrates how to load a bitmap from an Icon handle, using the GraphicsUnit enumeration, and the use of the Round method to draw the rectangle bounds of a bitmap.

此示例旨在与 Windows 窗体一起使用。This example is designed to be used with Windows Forms. 创建一个包含名为 "Button2" 的按钮的窗体。Create a form that contains a button named Button2. 将代码粘贴到窗体中, 并将此方法与按钮Click的事件关联。Paste the code into the form and associate this method with the button's Click event.

void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   Bitmap^ bitmap1 = Bitmap::FromHicon( SystemIcons::Hand->Handle );
   Graphics^ formGraphics = this->CreateGraphics();
   GraphicsUnit units = GraphicsUnit::Point;
   RectangleF bmpRectangleF = bitmap1->GetBounds( units );
   Rectangle bmpRectangle = Rectangle::Round( bmpRectangleF );
   formGraphics->DrawRectangle( Pens::Blue, bmpRectangle );
   delete formGraphics;
}
private void Button2_Click(System.Object sender, System.EventArgs e)
{

    Bitmap bitmap1 = Bitmap.FromHicon(SystemIcons.Hand.Handle);
    Graphics formGraphics = this.CreateGraphics();
    GraphicsUnit units = GraphicsUnit.Point;

    RectangleF bmpRectangleF = bitmap1.GetBounds(ref units);
    Rectangle bmpRectangle = Rectangle.Round(bmpRectangleF);
    formGraphics.DrawRectangle(Pens.Blue, bmpRectangle);
    formGraphics.Dispose();
}
Private Sub Button2_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button2.Click

    Dim bitmap1 As Bitmap = Bitmap.FromHicon(SystemIcons.Hand.Handle)
    Dim formGraphics As Graphics = Me.CreateGraphics()
    Dim units As GraphicsUnit = GraphicsUnit.Point
    Dim bmpRectangleF As RectangleF = bitmap1.GetBounds(units)
    Dim bmpRectangle As Rectangle = Rectangle.Round(bmpRectangleF)
    formGraphics.DrawRectangle(Pens.Blue, bmpRectangle)
    formGraphics.Dispose()
End Sub

适用于