描述

 

在设计单位中获取该字体家族的大?ㄍǔ３莆狤M大小或EM高度）.

 

C++ Syntax

 

 

FreeBASIC 语法

 

 

参数

 

nStyle

 

[in]整数,指定字体的样式.该值必须在FontStyle枚举或一位或运算符应用于两种或两种以上的元素的结果的一个元素.例如,fontstylebold或fontstyleunderline或fontstylestrikeout指定组合的三种风格.

 

返回值

 

此方法返回该字体家族的设计单位的大小.

 

引用文件

 

CGpFontFamily.inc (include CGdiPlus.inc)

 

示例

 

' ========================================================================================

' The following example creates a FontFamily object, gets the em height in design units,

' and outputs the value as text.

' ========================================================================================

SUB Example_GetEmHeight (BYVAL hdc AS HDC)

 

  ' // Create a graphics object from the window device context

  DIM graphics AS CGpGraphics = hdc

  ' // Get the DPI scaling ratio

  DIM rxRatio AS SINGLE = graphics.GetDpiX / 96

  DIM ryRatio AS SINGLE = graphics.GetDpiY / 96

  ' // Set the scale transform

  graphics.ScaleTransform(rxRatio, ryRatio)

 

  ' // Create a FontFamily object

  DIM emHeightFontFamily AS CGpFontFamily = "arial"

 

  ' // Get the cell ascent of the font family in design units.

  DIM emHeight AS LONG = emHeightFontFamily.GetEmHeight(FontStyleRegular)

 

  ' // Copy the height into a string and draw the string.

  DIM solidBrush AS CGpSolidBrush = GDIP_ARGB(255, 0, 0, 0)

  DIM font AS CGpFont = CGpFont(@emHeightFontFamily, AfxPointsToPixelsX(16) / rxRatio)

  DIM wszText AS WSTRING * 260

  wszText = "emHeightFontFamily.GetEmHeight() returns " & STR(emHeight)

  graphics.DrawString(@wszText, -1, @font, 0, 0, @solidbrush)

 

END SUB

' ========================================================================================