How to get the list of fonts available - Delphi XE3 + Firemonkey 2?

问题

In order to create a font picker I need to get the list of fonts available to Firemonkey. As Screen.Fonts doesn't exist in FireMonkey I thought I'd need to use FMX.Platform ? eg:

if TPlatformServices.Current.SupportsPlatformService(IFMXSystemFontService, IInterface(FontSvc)) then
  begin
    edit1.Text:= FontSvc.GetDefaultFontFamilyName;
  end
  else
    edit1.Text:= DefaultFontFamily;

However, the only function available is to return the default Font name.

At the moment I'm not bothered about cross-platform support but if I'm going to move to Firemonkey I'd rather not rely on Windows calls where possible.

回答1:

The cross platform solution should use the MacApi.AppKit and Windows.Winapi together in conditional defines.

First Add these code to your uses clause:

{$IFDEF MACOS}
MacApi.Appkit,Macapi.CoreFoundation, Macapi.Foundation,
{$ENDIF}
{$IFDEF MSWINDOWS}
Winapi.Messages, Winapi.Windows,
{$ENDIF}

Then add this code to your implementation:

{$IFDEF MSWINDOWS}
function EnumFontsProc(var LogFont: TLogFont; var TextMetric: TTextMetric;
  FontType: Integer; Data: Pointer): Integer; stdcall;
var
  S: TStrings;
  Temp: string;
begin
  S := TStrings(Data);
  Temp := LogFont.lfFaceName;
  if (S.Count = 0) or (AnsiCompareText(S[S.Count-1], Temp) <> 0) then
    S.Add(Temp);
  Result := 1;
end;
{$ENDIF}

procedure CollectFonts(FontList: TStringList);
var
{$IFDEF MACOS}
  fManager: NsFontManager;
  list:NSArray;
  lItem:NSString;
{$ENDIF}
{$IFDEF MSWINDOWS}
  DC: HDC;
  LFont: TLogFont;
{$ENDIF}
  i: Integer;
begin

  {$IFDEF MACOS}
    fManager := TNsFontManager.Wrap(TNsFontManager.OCClass.sharedFontManager);
    list := fManager.availableFontFamilies;
    if (List <> nil) and (List.count > 0) then
    begin
      for i := 0 to List.Count-1 do
      begin
        lItem := TNSString.Wrap(List.objectAtIndex(i));
        FontList.Add(String(lItem.UTF8String))
      end;
    end;
  {$ENDIF}
  {$IFDEF MSWINDOWS}
    DC := GetDC(0);
    FillChar(LFont, sizeof(LFont), 0);
    LFont.lfCharset := DEFAULT_CHARSET;
    EnumFontFamiliesEx(DC, LFont, @EnumFontsProc, Winapi.Windows.LPARAM(FontList), 0);
    ReleaseDC(0, DC);
  {$ENDIF}
end;

Now you can use CollectFonts procedure. Don't forget to pass a non-nil TStringlist to the procedure.A typical usage may be like this.

procedure TForm1.FormCreate(Sender: TObject);
var fList: TStringList;
    i: Integer;
begin
  fList := TStringList.Create;
  CollectFonts(fList);
  for i := 0 to fList.Count -1 do
  begin
     ListBox1.Items.Add(FList[i]);
  end;
  fList.Free;
end;

回答2:

I've used the following solution:

  Printer.ActivePrinter;
  memo1.lines.AddStrings(Printer.Fonts);

declaring FMX.Printer in the uses.

回答3:

unit Unit1;

interface

uses
  Windows, SysUtils, Classes, Forms, Controls, StdCtrls;

type
  TForm1 = class(TForm)
    ComboBox1: TComboBox;
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}                      

procedure TForm1.FormShow(Sender: TObject);
begin
  ComboBox1.Items.Assign(Screen.Fonts);
  ComboBox1.Text := 'Fonts...';
end;

end.

来源：https://stackoverflow.com/questions/13346620/how-to-get-the-list-of-fonts-available-delphi-xe3-firemonkey-2

标签

Delphi

firemonkey

delphi-xe3

firemonkey-fm2