再学 GDI+[39]: 文本输出 - 文本样式

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, CheckLst;



type

  TForm1 = class(TForm)

    CheckListBox1: TCheckListBox;

    procedure FormPaint(Sender: TObject);

    procedure FormCreate(Sender: TObject);

    procedure CheckListBox1Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



uses GDIPOBJ, GDIPAPI;



var fs: Integer;



procedure TForm1.CheckListBox1Click(Sender: TObject);

const

  fsArr: array[0..5] of Integer = (FontStyleRegular,

                                   FontStyleBold,

                                   FontStyleItalic,

                                   FontStyleBoldItalic,

                                   FontStyleUnderline,

                                   FontStyleStrikeout);

var

  i: Integer;

begin

  fs := 0;

  for i := 0 to CheckListBox1.Items.Count - 1 do

    if CheckListBox1.Checked[i] then

      fs := fs or fsArr[i];

  Repaint;

end;



procedure TForm1.FormCreate(Sender: TObject);

begin

  CheckListBox1.Align := alLeft;

  CheckListBox1.Items.CommaText := 'FontStyleRegular,' +

                                   'FontStyleBold,' +

                                   'FontStyleItalic,' +

                                   'FontStyleBoldItalic,' +

                                   'FontStyleUnderline,' +

                                   'FontStyleStrikeout';

  CheckListBox1.Checked[0] := True;

end;



procedure TForm1.FormPaint(Sender: TObject);

var

  g: TGPGraphics;

  sb: TGPSolidBrush;

  font: TGPFont;

begin

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

  sb := TGPSolidBrush.Create(aclRed);



  font := TGPFont.Create('微软雅黑', 50, fs);

  g.DrawString('Delphi', -1, font, MakePoint(CheckListBox1.Width + 0.0, 0), sb);



  font.Free;

  sb.Free;

  g.Free;

end;



end.


 
   

窗体文件:

---

object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 98

  ClientWidth = 367

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  Position = poDesktopCenter

  OnCreate = FormCreate

  OnPaint = FormPaint

  PixelsPerInch = 96

  TextHeight = 13

  object CheckListBox1: TCheckListBox

    Left = 8

    Top = 8

    Width = 113

    Height = 148

    ItemHeight = 13

    TabOrder = 0

    OnClick = CheckListBox1Click

  end

end


 
   

文本样式的定义:

---

FontStyle = Integer;

const

  FontStyleRegular    = Integer(0); {普通文本}

  FontStyleBold       = Integer(1); {加粗文本}

  FontStyleItalic     = Integer(2); {倾斜文本}

  FontStyleBoldItalic = Integer(3); {加粗并倾斜文本}

  FontStyleUnderline  = Integer(4); {带下划线的文本}

  FontStyleStrikeout  = Integer(8); {中间有直线通过的文本}

Type

TFontStyle = FontStyle;