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PREVIEW.PAS
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Pascal/Delphi Source File
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1991-07-10
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18KB
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580 lines
{Font Preview - 1.2 Program Copyright (C) Doug Overmyer 7/8/91}
program PREVIEW;
{$S-}
{$R PREVIEW.RES}
uses WinTypes, WinProcs, WinDos, Strings, WObjects,WOPlus,WFPlus,StdDlgs;
const
id_But1 = 201;
id_But2 = 202;
id_But3 = 203;
id_But4 = 204;
id_But5 = 205;
id_Lb1 = 301;
id_lb2 = 302;
id_St1 = 401;
id_St2 = 402;
id_St3 = 403;
id_St4 = 404;
{******************************************************************}
{ Types }
{******************************************************************}
type
TPVApplication = object(TApplication)
procedure InitMainWindow;virtual;
end;
PPVDlg1 = ^TPVDlg1;
TPVDlg1 = object(TDialog)
FontSize: Integer;
procedure WMInitDialog(var Msg:TMessage);virtual wm_First+wm_InitDialog;
procedure IDLb1(var Msg:TMessage);virtual id_First+id_Lb1;
end;
PPVDlg2 = ^TPVDlg2;
TPVDlg2 = object(TDialog)
procedure WMInitDialog(var Msg:TMessage);virtual wm_First+wm_InitDialog;
end;
type {convert TLogFont records to objects}
PFontItem = ^TFontItem;
TFontItem = object(TObject)
LogFont:TLogFont;
FontType:Integer;
constructor Init(NewItem:TLogFont;NewType:Integer);
destructor Done;virtual;
end;
PFontCollection = ^TFontCollection;
TFontCollection = object(TSortedCollection)
function KeyOf(Item:Pointer):Pointer;virtual;
function Compare(Key1,Key2:Pointer):Integer;virtual;
function GetCount:Integer;virtual;
end;
type {Child win to display sample text}
PFontWindow = ^TFontWindow;
TFontWindow = object(TWindow)
FontsHeight: LongInt;
constructor Init(AParent: PWindowsObject; ATitle: PChar);
procedure Paint(PaintDC: HDC; var PaintInfo: TPaintStruct); virtual;
procedure Destroy; virtual;
procedure WMSize(var Msg: TMessage);
virtual wm_First + wm_Size;
end;
type {MainWindow of Application}
PPVWindow = ^TPVWindow;
TPVWindow = object(TWindow)
FWin:PFontWindow;
FBox:PListBox;
TheIcon:HIcon;
Bn1,Bn2,Bn3,Bn4,Bn5 :PODButton;
Dlg1 : PPVDlg1; {Select font size dialog}
St1,St2,St3,St4:PStatic;
TextString:Array[0..80] of Char; {to display in FWin}
FontSelection:Integer; {Index into Fonts collection}
FontSize:Integer; {Current font size desired}
FontMetrics:TTextMetric; {Current font metrics}
constructor Init(AParent:PWindowsObject;ATitle:PChar);
destructor Done;virtual;
procedure SetupWindow;virtual;
procedure Paint(PaintDC:HDC;var PaintInfo:TPaintStruct);virtual;
procedure LoadFBox;
procedure WMDrawItem(var Msg:TMessage);virtual wm_First + wm_DrawItem;
procedure WMSize(var Msg:TMessage);virtual wm_First+wm_Size;
procedure WMSetFocus(var Msg:TMessage);virtual wm_First+wm_SetFocus;
procedure IDBut1(var Msg:TMessage);virtual id_First+id_But1; {About}
procedure IDBut2(var Msg:TMessage);virtual id_First+id_But2; {Size}
procedure IDBut3(var Msg:TMessage);virtual id_First+id_But3; {String}
procedure IDBut4(var Msg:TMessage);virtual id_First+id_But4; {Text Metrics}
procedure IDBut5(var Msg:TMessage);virtual id_First+id_But5; {Exit}
procedure IDLB2(var Msg:TMessage);virtual id_First+id_lb2;
procedure EnumerateFaces;virtual;
function GetFontSelection:Integer;virtual;
function GetFontSize:Integer;virtual;
function GetTextString:PChar;virtual;
procedure SetFontSize(NewfontSize:Integer);virtual;
end;
{********************************************************************}
{G L O B A L V A R I A B L E S }
{********************************************************************}
var
Fonts:PFontCollection; {collection of PFontItem for call-back func}
Sizes:PStack; {collection of Strings for call-back func}
{********************************************************************}
{M E T H O D S }
{********************************************************************}
procedure TPVApplication.InitMainWindow;
begin
MainWindow := New(PPVWindow,Init(nil,'Font Preview'));
end;
{********************************************************************}
{Init}
constructor TPVWindow.Init(AParent:PWindowsObject;ATitle:PChar);
begin
TWindow.Init(AParent,ATitle);
Attr.Menu := 0;
Attr.X := 20; Attr.Y := 25; Attr.W := 595; Attr.H := 260;
Bn1 := New(PODButton,Init(@Self,id_But1,'Font Size',0,0,50,50,False,'PV_Bn1'));
Bn2 := New(PODButton,Init(@Self,id_But2,'Font Size',50,0,50,50,False,'PV_Bn2'));
Bn3 := New(PODButton,Init(@Self,id_But3,'String',100,0,100,50,False,'PV_Bn3'));
Bn4 := New(PODButton,Init(@Self,id_But4,'String',200,0,50,50,False,'PV_Bn4'));
Bn5 := New(PODButton,Init(@Self,id_But5,'Exit',250,0,50,50,False,'PV_Bn5'));
St1 := New(PStatic,Init(@Self,id_St1,'',315,5,240,18,75));
St2 := New(PStatic,Init(@Self,id_St2,'',315,26,240,18,75));
St3 := New(PStatic,Init(@Self,id_ST3,'',310,3,250,44,75));
St4 := New(PStatic,Init(@Self,id_St4,'',5,55,100,18,75));
St2^.Attr.Style := St2^.Attr.Style or ss_LeftNoWordWrap;
St3^.Attr.Style := St3^.Attr.Style or ss_BlackFrame;
St4^.Attr.Style := St4^.Attr.Style or ss_Left;
FontSelection := 0;
FontSize := 48;
StrCopy(TextString,'');
Fonts := New(PFontCollection,Init(100,100));
Fonts^.Duplicates := False;
Sizes := New(PStack,Init(10,10));
EnumerateFaces;
FWin := New(PFontWindow,Init(@Self,ATitle));
with FWin^.Attr do
Style := Style or ws_Child or ws_HScroll or ws_VScroll or ws_Border ;
FBox := New(PListBox,Init(@Self,id_lb2,0,0,0,0));
with FBox^.Attr do Style := Style and not lbs_Sort or lbs_nointegralheight ;
end;
{SetupWindow}
procedure TPVWindow.SetupWindow;
begin
TWindow.SetupWindow;
SetClassWord(HWindow,GCW_HIcon,LoadIcon(HInstance,'PV_Icon'));
LoadFBox;
end;
{Paint}
procedure TPVWindow.Paint(PaintDC:HDC;var PaintInfo:TPaintStruct);
var
ThePen:HPen;
TheBrush :HBrush;
OldBrush :HBrush;
OldPen:HPen;
OldBitMap:HBitMap;
MemDC :HDC;
CR:TRect;
W,H:Integer;
BMRec:TBitMap;
begin
TheBrush := GetStockObject(LtGray_Brush);
ThePen := CreatePen(ps_Solid,1,$00000000);
OldPen := SelectObject(PaintDC,ThePen);
OldBrush := SelectObject(PaintDC,TheBrush);
GetClientRect(HWindow,CR);
Rectangle(PaintDC,CR.left,CR.Top,CR.right,50);
SelectObject(PaintDC,OldBrush);
SelectObject(PaintDC,OldPen);
DeleteObject(ThePen);
end;
{Route the Ownerdraw msgs to correct object}
procedure TPVWindow.WMDrawItem(var Msg:TMessage);
var
PDIS : ^TDrawItemStruct;
begin
PDIS := Pointer(Msg.lParam);
case PDIS^.CtlType of
odt_Button:
case PDIS^.CtlID of
id_But1 :Bn1^.DrawItem(Msg);
id_But2 :Bn2^.DrawItem(Msg);
id_But3 :Bn3^.DrawItem(Msg);
id_But4 :Bn4^.DrawItem(Msg);
id_But5 :Bn5^.DrawItem(Msg);
end;
end;
end;
{Done}
destructor TPVWindow.Done;
begin
Dispose(Sizes,Done);
TWindow.Done;
end;
{WMSize}
procedure TPVWindow.WMSize(var Msg:TMessage);
begin
SetWindowPos(FBox^.HWindow,0,-1,75,(Msg.LParamLo div 3)+1,
((Msg.LParamHi-75) ),swp_NoZOrder);
SetWindowPos(FWin^.HWindow,0,(Msg.LParamLo div 3)-1,49,
(Msg.LParamLo * 2 div 3)+1,(Msg.LParamHi-48),swp_NoZOrder);
end;
{WMSetFocus}
procedure TPVWindow.WMSetFocus(var Msg:TMessage);
begin
SetFocus(FBox^.HWindow);
end;
procedure TPVWindow.IDBut1(var Msg:TMessage);
var
Dlg : PDialog;
begin
Dlg :=New(PDialog,Init(@Self,'PV_About'));
Application^.ExecDialog(Dlg);
end;
{IDBut2} {run font size dialog box}
procedure TPVWindow.IDBut2(var Msg:TMessage);
begin
Dlg1 := new(PPVDlg1,Init(@Self,'PV_Dlg1'));
Application^.ExecDialog(Dlg1);
if (Dlg1^.FontSize) <> 0 then
InvalidateRect(Fwin^.HWindow,nil,True);
end;
{IDBut3} {run sample string dialog box}
procedure TPVWindow.IDBut3(var Msg:TMessage);
var
TotChars:Integer;
begin
If Application^.ExecDialog(New(PInputdialog,Init(@Self,'Font String',
'Enter text:',TextString,SizeOf(TextString)))) = id_OK then
else StrCopy(TextString,'');
InvalidateRect(FWin^.HWindow,nil,True);
end;
{IdBut4} {GetTextMetrics}
procedure TPVWindow.IDBut4(var Msg:TMessage);
var
Dlg : PPVDlg2;
begin
Dlg :=New(PPVDlg2,Init(@Self,'PV_Dlg2'));
Application^.ExecDialog(Dlg);
end;
{IdBut5} {exit}
procedure TPVWindow.IDBut5(var Msg:TMessage);
begin
SendMessage(HWindow,wm_Close,0,0);
end;
procedure TPVWindow.LoadFBox;
var
Indx : Integer;
Font : PFontItem;
Buf1 :Array[0..20] of Char;
Buf2 :Array[0..5] of Char;
begin
Str(Fonts^.Getcount,Buf2);
StrECopy(StrECopy(StrECopy(Buf1,'*'),Buf2),' Fonts*');
St4^.SetText(Buf1);
for indx := 0 to (Fonts^.GetCount -1) do
begin
Font := Fonts^.At(indx);
FBox^.InsertString(Font^.LogFont.lfFaceName,-1);
end;
end;
procedure TPVWindow.IDLB2(var Msg:TMessage);
var
szBuffer:Array[0..80] of Char;
indx:Integer;
begin
case Msg.lParamHi of
lbn_DblClk, lbn_SelChange:
begin
indx := FBox^.GetSelIndex;
FontSelection := Indx;
InvalidateRect(FWin^.HWindow,nil,True);
Exit;
end;
end;
end;
function EnumerateFace(var LogFont: TLogFont; TextMetric: PTextMetric;
FontType: Integer; Data: PChar): Integer; export;
var
OldFont: HFont;
begin
Fonts^.Insert(New(PFontItem,Init(LogFont,FontType)));
EnumerateFace := 1;
end;
{ Collect all of the system fonts }
procedure TPVWindow.EnumerateFaces;
var
EnumProc: TFarProc;
TheDC :HDC;
begin
TheDC := GetDC(HWindow);
EnumProc := MakeProcInstance(@EnumerateFace, HInstance);
EnumFonts(TheDC, nil, EnumProc, nil);
ReleaseDC(HWindow, TheDC);
end;
function TPVWindow.GetFontSelection:Integer;
begin
GetFontSelection := FontSelection;
end;
function TPVWindow.GetFontSize:Integer;
begin
GetFontSize := FontSize;
end;
function TPVWindow.GetTextString:PChar;
begin
GetTextString := @TextString;
end;
procedure TPVWindow.SetFontSize(NewFontSize:Integer);
begin
FontSize := NewFontSize;
end;
{***********************************************************************}
{ Initialize object and collect font information }
constructor TFontWindow.Init(AParent: PWindowsObject; ATitle: PChar);
begin
TWindow.Init(AParent, ATitle);
Attr.Style := Attr.Style or ws_VScroll or ws_HScroll or ws_Border;
FontsHeight := 0;
Scroller := New(PScroller, Init(@Self, 12, 12,0,0));
end;
{ Draw font name in Window & update static text}
procedure TFontWindow.Paint(PaintDC: HDC; var PaintInfo: TPaintStruct);
var
I: Integer;
VPosition: Integer;
FontItem :PFontItem;
FontSel:Integer;
AFont:HFont;
OldFont:HFont;
Extent:LongRec;
Text:Array[0..80] of Char;
Buf:Array[0..80] of Char;
szFH:Array[0..4] of Char;
begin
FontItem := Fonts^.At(PPVWindow(Parent)^.GetFontSelection);
FontItem^.LogFont.lfHeight := PPVWindow(Parent)^.GetFontSize;
FontsHeight := PPVWindow(Parent)^.GetFontSize;
FontItem^.LogFont.lfWidth := 0;
FontItem^.LogFont.lfWeight := 0;
FontItem^.LogFont.lfQuality := Proof_Quality;
VPosition := 5;
if StrComp(PPVWindow(Parent)^.GetTextString,'') = 0
then StrCopy(Text,FontItem^.LogFont.lfFaceName)
else StrCopy(Text,PPVWindow(Parent)^.GetTextString);
AFont := CreateFontIndirect(FontItem^.LogFont);
OldFont := SelectObject(PaintDC, AFont);
GetTextMetrics(PaintDC,PPVWindow(Parent)^.FontMetrics);
LongInt(Extent) := GetTextExtent(PaintDC,Text,
StrLen(Text));
Scroller^.SetRange(Extent.lo div 12, Extent.Hi div 12);
TextOut(PaintDC, 10,VPosition, Text,
StrLen(Text));
StrCopy(Buf,'Face: ');
PPVWindow(Parent)^.St1^.SetText(StrCat(Buf,FontItem^.LogFont.lfFaceName));
Str(PPVWindow(Parent)^.FontMetrics.tmHeight:3,szFH);
StrECopy(StrECopy(Buf,'Size:'),szFH);
PPVWindow(Parent)^.St2^.SetText(Buf);
SelectObject(PaintDC,OldFont);
DeleteObject(AFont);
end;
procedure TFontWindow.Destroy;
begin
TWindow.Destroy;
end;
procedure TFontWindow.WMSize(var Msg: TMessage);
begin
TWindow.WMSize(Msg);
end;
{***********************************************************************}
constructor TFontItem.Init(NewItem:TLogFont;NewType:Integer);
begin
LogFont := NewItem;
FontType := NewType;
end;
destructor TFontItem.Done;
begin
end;
{***********************************************************************}
function TFontCollection.KeyOf(Item:Pointer):Pointer;
var
Ptr :PChar;
begin
Ptr := PFontItem(Item)^.LogFont.lfFaceName;
KeyOf := Ptr;
end;
function TFontCollection.Compare(Key1,Key2:Pointer):Integer;
begin
Compare := StrIComp(PChar(Key1),PChar(Key2));
end;
function TFontCollection.GetCount:Integer;
begin
GetCount := Count;
end;
{***********************************************************************}
procedure TPVDlg1.IDLb1(var Msg:TMessage);
var
Idx : Integer;
Buf:Array[0..5] of Char;
Ptr : PChar;
ErrCode:Integer;
begin
case Msg.lParamHi of
lbn_SelChange,lbn_DblClk:
begin
Ptr := Buf;
Idx := SendDlgItemMsg(id_Lb1,lb_GetCurSel,0,0);
SendDlgItemMsg(id_Lb1,lb_GetText,word(Idx),LongInt(Ptr));
val(Ptr,FontSize,ErrCode);
PPVWindow(Parent)^.SetFontSize(FontSize);
EndDlg(Idx);
Exit;
end;
end;
end;
function EnumerateSize(var LogFont: TLogFont; TextMetric: PTextMetric;
FontType: Integer; Data: PChar): Integer; export;
var
FHeight:Array[0..6] of Char;
begin
Str(LogFont.lfHeight:3,FHeight);
Sizes^.Push(New(PStackStr,Init(FHeight)));
EnumerateSize := 1;
end;
procedure TPVDlg1.WMInitDialog(var Msg:TMessage);
var
pTextItem:PChar;
Buf:Array[0..3] of Char;
Indx:Integer;
DSN,ErrCode :Integer;
EnumProc:TFarProc;
TheDC:HDc;
FontItem:PFontItem;
Item:PStackStr;
begin
TDialog.WMInitDialog(Msg);
Sizes^.DeleteAll;
FontItem := Fonts^.At(PPVWindow(Parent)^.GetFontSelection);
TheDC := GetDC(HWindow);
EnumProc := MakeProcInstance(@EnumerateSize, HInstance);
EnumFonts(TheDC, FontItem^.LogFont.lfFaceName, EnumProc, nil);
ReleaseDC(HWindow, TheDC);
Indx := 12;
pTextItem := Buf;
if FontItem^.FontType <> 1 then
begin
Str(Indx:3,Buf);
while Indx < 200 do
begin
SendDlgItemMsg(id_Lb1,lb_AddString,word(0),LongInt(pTextItem));
Indx := Indx + 12;
Str(Indx:3,Buf);
end;
end
else
while Sizes^.Count > 0 do
begin
Item := Sizes^.Pop;
StrCopy(Buf,Item^.StackStr);
Dispose(Item,Done);
SendDlgItemMsg(id_Lb1,lb_AddString,word(0),LongInt(pTextItem));
end;
end;
{***********************************************************************}
procedure TPVDlg2.WMInitDialog(var Msg:TMessage);
const
FontFamily : Array[0..5,0..11] of Char = ('Don''t Care', ' Roman',
' Swiss',' Modern', ' Script', 'Decorative');
var
FontItem:PFontItem;
TextItem:PChar;
Buf:Array[0..3] of Char;
FontMetrics:TTextMetric;
begin
FontMetrics :=PPVWindow(Parent)^.FontMetrics;
TDialog.WMInitDialog(Msg);
FontItem := Fonts^.At(PPVWindow(Parent)^.GetFontSelection);
SetDlgItemText(HWindow,601,FontItem^.LogFont.lfFaceName);
Str(FontMetrics.tmHeight:3,Buf); SetDlgItemText(HWindow,612,Buf);
Str(FontMetrics.tmAscent:3,Buf); SetDlgItemText(HWindow,613,Buf);
Str(FontMetrics.tmDescent:3,Buf); SetDlgItemText(HWindow,614,Buf);
Str(FontMetrics.tmInternalLeading:3,Buf); SetDlgItemText(HWindow,615,Buf);
Str(FontMetrics.tmExternalLeading:3,Buf); SetDlgItemText(HWindow,616,Buf);
Str(FontMetrics.tmAveCharWidth:3,Buf); SetDlgItemText(HWindow,617,Buf);
Str(FontMetrics.tmMaxCharWidth:3,Buf); SetDlgItemText(HWindow,618,Buf);
Str(FontMetrics.tmWeight:3,Buf); SetDlgItemText(HWindow,619,Buf);
Str(FontMetrics.tmItalic:3,Buf); SetDlgItemText(HWindow,620,Buf);
Str(FontMetrics.tmUnderlined:3,Buf); SetDlgItemText(HWindow,621,Buf);
Str(FontMetrics.tmStruckOut:3,Buf); SetDlgItemText(HWindow,632,Buf);
Str(FontMetrics.tmFirstChar:3,Buf); SetDlgItemText(HWindow,633,Buf);
Str(FontMetrics.tmLastChar:3,Buf); SetDlgItemText(HWindow,634,Buf);
Str(FontMetrics.tmDefaultChar:3,Buf); SetDlgItemText(HWindow,635,Buf);
if FontMetrics.tmPitchandFamily and 1 > 0 then SetDlgItemText(HWindow,636,'Variable')
else SetDlgItemText(HWindow,636,'Fixed');
SetDlgItemText(HWindow,637,FontFamily[FontMetrics.tmPitchAndFamily shr 4] );
if FontMetrics.tmCharSet = ANSI_CharSet then SetDlgItemText(HWindow,638,'Ansi')
else if FontMetrics.tmCharSet = OEM_CharSet then SetDlgItemText(HWindow,638,'OEM')
else if FontMetrics.tmCharSet = Symbol_CharSet then SetDlgItemText(HWindow,638,'Symbol')
else if FontMetrics.tmCharSet = ShiftJis_CharSet then SetDlgItemText(HWindow,638,'ShiftJis')
else SetDlgItemText(HWindow,638,' ');
Str(FontMetrics.tmOverHang:3,Buf); SetDlgItemText(HWindow,639,Buf);
Str(FontMetrics.tmDigitizedAspectX:3,Buf); SetDlgItemText(HWindow,640,Buf);
Str(FontMetrics.tmDigitizedAspectY:3,Buf); SetDlgItemText(HWindow,641,Buf);
end;
{*********************************************************************}
{*** M A I N L I N E }
{*********************************
***********************************}
var
PVApp : TPVApplication;
begin
PVApp.Init('A Font Preview');