本例效果圖:
代碼文件:unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
ListBox1: TListBox;
procedure FormPaint(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure ListBox1Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI;
var
FontName: string = '宋體';
procedure TForm1.FormCreate(Sender: TObject);
var
str: string;
begin
ListBox1.Align := alRight;
for str in Screen.Fonts do
if str[1] <> '@' then
ListBox1.Items.Add(str);
end;
procedure TForm1.FormPaint(Sender: TObject);
var
g: TGPGraphics;
b: TGPBrush;
font: TGPFont;
fontFamily: TGPFontFamily;
begin
g := TGPGraphics.Create(Canvas.Handle);
b := TGPSolidBrush.Create(aclRed);
fontFamily := TGPFontFamily.Create(FontName);
font := TGPFont.Create(fontFamily, 48, FontStyleBold);
g.DrawString('Delphi', -1, font, MakePoint(5.0,20.0), b);
Text := Format('Height: %f', [font.GetHeight(g)]);
fontFamily.Free;
font.Free;
b.Free;
g.Free;
end;
procedure TForm1.ListBox1Click(Sender: TObject);
begin
FontName := ListBox1.Items[ListBox1.ItemIndex];
Repaint;
end;
end.
窗體文件:object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 126
ClientWidth = 375
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 ListBox1: TListBox
Left = 242
Top = 8
Width = 121
Height = 97
ItemHeight = 13
TabOrder = 0
OnClick = ListBox1Click
end
end
