再学 GDI+[38]: 文本输出 - DrawString、TGPFont

本例效果图:

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代码文件:

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unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Button1: TButton;

    Button2: TButton;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



uses GDIPOBJ, GDIPAPI;



procedure TForm1.Button1Click(Sender: TObject);

var

  g: TGPGraphics;

  sb: TGPSolidBrush;

  font: TGPFont;

begin

  g := TGPGraphics.Create(Canvas.Handle);

  sb := TGPSolidBrush.Create(aclBlack);



  {指定字体名和字号即可建立 TGPFont 类}

  font := TGPFont.Create('宋体', 9);

  g.DrawString('娇女字平阳 折花倚桃边 折花不见我 泪下如流泉', -1, font, MakePoint(10.0,20), sb);

  {参数 2 为 -1 表示输出所有指定字符; 参数 4 必须为 TGPPointF 结构}



  font.Free;

  sb.Free;

  g.Free;

end;



procedure TForm1.Button2Click(Sender: TObject);

var

  g: TGPGraphics;

  sb: TGPSolidBrush;

  font: TGPFont;

begin

  g := TGPGraphics.Create(Canvas.Handle);

  sb := TGPSolidBrush.Create(aclBlack);



  {借用其他 DC 的特征建立 TGPFont 类; 但好像不能继承所有特征, 譬如字体颜色}

  Canvas.Font.Name := '宋体';

  Canvas.Font.Size := 9;

  font := TGPFont.Create(Canvas.Handle);



  g.DrawString('小儿名伯禽 与姊亦齐肩 双行桃树下 抚背复谁怜', -1, font, MakePoint(10.0,40), sb);



  font.Free;

  sb.Free;

  g.Free;

end;



end.


 
   

窗体文件:

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object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 105

  ClientWidth = 282

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  Position = poDesktopCenter

  PixelsPerInch = 96

  TextHeight = 13

  object Button1: TButton

    Left = 64

    Top = 68

    Width = 75

    Height = 25

    Caption = 'Button1'

    TabOrder = 0

    OnClick = Button1Click

  end

  object Button2: TButton

    Left = 145

    Top = 68

    Width = 75

    Height = 25

    Caption = 'Button2'

    TabOrder = 1

    OnClick = Button2Click

  end

end