再学 GDI+[38]: 文本输出 DrawString、TGPFont

本例效果图:

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代码文件:

---

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:

---

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