rendered paste body{
Project: File Editor
Student: Χάρης Λιβάρδας
}
program FileEditor;
{$APPTYPE GUI}
Uses
Strings,Windows;
Const
AppName = 'File Editor';
Type
TFileName = Array[0..Max_Path] Of Char;
Var
AMessage : Msg;
HWindow,HStatus,HEdit : HWnd;
TheLogFont : TLogFont;
TheColor : DWORD;
FileName : TFileName;
{********************************************************************}
Procedure SetStatusText(Num : Integer; Const Text : string);
var
StatText : array[0..255] of Char;
begin
if Num = 0 then
StatText[0] := ' '
else
StatText[0] := #9;
StrPCopy(@StatText[1],Text);
SendMessage(HStatus,SB_SETTEXT,Num,LongInt(@StatText));
end;
{********************************************************************}
Function SelectFile(Var FName:TFileName; Open:Boolean): Boolean;
Const
Filter : PChar = 'Text files (*.txt)'#0'*.txt'#0+
'All files (*.*)'#0'*.*'#0#0;
Ext : PChar = 'txt';
Var
NameRec : OpenFileName;
Begin
FillChar(NameRec,SizeOf(NameRec),0);
FName[0] := #0;
With NameRec Do
Begin
LStructSize := SizeOf(NameRec);
HWndOwner := HWindow;
LpStrFilter := Filter;
LpStrFile := @FName;
NMaxFile := Max_Path;
Flags := OFN_Explorer Or OFN_HideReadOnly;
If Open Then
Begin
Flags := Flags Or OFN_FileMustExist;
End;
LpStrDefExt := Ext;
End;
If Open Then
SelectFile := GetOpenFileName(@NameRec)
Else
SelectFile := GetSaveFileName(@NameRec);
End;
{********************************************************************}
Procedure SaveText;
Var
Len : Longint;
P : PChar;
F : File;
FName : TFileName;
Begin
If SelectFile(FName,False) Then
Begin
Assign(F,@FName);
Rewrite(F,1);
Len := GetWindowTextLength(HEdit);
GetMem(P,Len+1);
P[Len] := #0;
If Len>0 Then
Begin
GetWindowText(HEdit,P,Len+1);
BlockWrite(F,P^,Len);
End;
Close(F);
FreeMem(P,Len+1);
StrCopy(FileName,FName);
SetStatusText(0,StrPas(FileName));
SetStatusText(1,'');
SendMessage(HEdit,EM_SetModify,0,0);
End;
End;
{********************************************************************}
Procedure AskSave;
Const
BoxType = MB_IconQuestion Or MB_YesNo;
Begin
If SendMessage(HEdit,EM_GetModify,0,0)<>0 Then
Begin
If MessageBox(HWindow,'Save text?','Edited',BoxType)=IdYes Then
Begin
SaveText;
End;
End;
End;
{********************************************************************}
Procedure LoadText;
Var
F : File;
Len : LongInt;
P : PChar;
Begin
AskSave;
If SelectFile(FileName,True) Then
Begin
Assign(F,@FileName);
Reset(F,1);
Len := FileSize(F);
GetMem(P,Len+1);
P[Len] := #0;
If Len>0 Then BlockRead(F,P^,Len);
Close(F);
SetWindowText(HEdit,P);
SendMessage(HEdit,EM_SetModify,0,0);
FreeMem(P,Len+1);
SetStatusText(0,StrPas(FileName));
SetStatusText(1,'');
End;
End;
{********************************************************************}
Procedure NewText;
Const
Empty : PChar = '';
Begin
AskSave;
FileName := 'Unsaved';
SetStatusText(0,StrPas(FileName));
SendMessage(HEdit,WM_SetText,1,LongInt(Empty));
SendMessage(HEdit,EM_SetModify,0,0);
End;
{********************************************************************}
Function WindowProc (Window:HWnd;AMessage,WParam,LParam:Longint): Longint;
stdcall; export;
Var
R : rect;
StatH : Word;
NrMenu : Longint;
NotiCode : LongInt;
Begin
WindowProc := 0;
Case AMessage Of
wm_Close:
Begin
AskSave;
End;
wm_Destroy:
Begin
PostQuitMessage (0);
Exit;
End;
wm_SetFocus:
Begin
SetFocus(HEdit);
End;
WM_EraseBkgnd:
Begin
Exit(1);
End;
wm_Size:
Begin
GetClientRect(HStatus,@R);
StatH := R.Bottom-R.Top;
GetClientRect(Window,@R);
MoveWindow (HEdit,0,0,R.Right,R.Bottom-StatH,False);
MoveWindow (HStatus,0,R.Bottom-StatH,R.Right,R.Bottom,False);
End;
wm_Command:
Begin
NotiCode := HiWord(WParam);
Case NotiCode of
en_Change :
Begin
If SendMessage(HEdit,EM_GetModify,0,0)<>0 then
SetStatusText(1,'Modified')
Else
SetStatusText(1,'');
End;
Else
Begin //Menu item
NrMenu := LoWord(WParam);
Case NrMenu Of
101 : NewText;
102 : LoadText;
103 : SaveText;
104 : PostMessage(Window,WM_Close,0,0);
201 : SendMessage(HEdit,WM_Undo,0,0);
202 : SendMessage(HEdit,WM_Cut,0,0);
203 : SendMessage(HEdit,WM_Copy,0,0);
204 : SendMessage(HEdit,WM_Paste,0,0);
401 : MessageBox(Window,'Help','Created by Xarhs Livardas',
MB_OK Or MB_IconInformation);
End;
End;
End;
End;
wm_CtlColorEdit :
Begin
SetTextColor(WParam,TheColor);
Exit(GetSysColorBrush(COLOR_WINDOW));
End;
End;
WindowProc := DefWindowProc(Window,AMessage,WParam,LParam);
End;
{********************************************************************}
Function WinRegister: Boolean;
Var
WindowClass : WndClass;
Begin
With WindowClass Do
Begin
Style := cs_hRedraw Or cs_vRedraw;
lpfnWndProc := WndProc(@WindowProc);
cbClsExtra := 0;
cbWndExtra := 0;
hInstance := system.MainInstance;
hIcon := LoadIcon (0,idi_Application);
hCursor := LoadCursor (0,idc_Arrow);
hbrBackground := GetStockObject(GRAY_BRUSH);
lpszMenuName := Nil;
lpszClassName := AppName;
End;
WinRegister := RegisterClass (WindowClass)<>0;
End;
{********************************************************************}
Function EditCreate(ParentWindow,Status:HWnd): HWnd;
Const
CS_Start = WS_Child or WS_HScroll or WS_VScroll or ES_MultiLine or ES_Left;
CS_Ex = WS_EX_ClientEdge;
EdiTText : PChar = '';
Var
HEdit : HWND;
R : TRect;
StatH : Word;
Begin
GetClientRect(Status,@R);
StatH := R.Bottom-R.Top;
GetClientRect(ParentWindow,@R);
HEdit := CreateWindowEx (CS_Ex,'EDIT',EditText,CS_Start,0,0,
R.Right-R.Left,R.Bottom-R.Top-StatH,ParentWindow,0,
MainInstance,Nil);
If HEdit<>0 Then
Begin
//Set Courier new as default font
with TheLogFont do
begin
lfHeight := 0; // Default logical height of font
lfWidth := 0; // Default logical average character width
lfEscapement := 0; // angle of escapement
lfOrientation := 0; // base-line orientation angle
lfWeight := FW_NORMAL; // font weight
lfItalic := 0; // italic attribute flag
lfUnderline := 0; // underline attribute flag
lfStrikeOut := 0; // strikeout attribute flag
lfCharSet := DEFAULT_CHARSET; // character set identifier
lfOutPrecision := OUT_DEFAULT_PRECIS; // output precision
lfClipPrecision := CLIP_DEFAULT_PRECIS; // clipping precision
lfQuality := DEFAULT_QUALITY; // output quality
lfPitchAndFamily := DEFAULT_PITCH; // pitch and family
Strcopy(lfFaceName,'Courier New'); // pointer to typeface name string
end;
TheColor := GetSysColor(COLOR_WINDOWTEXT);
ShowWindow(Hedit,SW_Show);
UpdateWindow(HEdit);
End;
EditCreate := HEdit;
End;
{********************************************************************}
Function WinCreate: HWnd;
Var hWindow : HWnd;
Menu : hMenu;
SubMenu : hMenu;
Begin
hWindow := CreateWindow (AppName,'File Editor',ws_OverlappedWindow,
cw_UseDefault,cw_UseDefault,cw_UseDefault,
cw_UseDefault,0,0,MainInstance,Nil);
If hWindow<>0 Then
Begin
Menu := CreateMenu;
SubMenu := CreateMenu;
AppendMenu(Submenu,MF_STRING,101,'&New...');
AppendMenu(Submenu,MF_STRING,102,'&Open...');
AppendMenu(Submenu,MF_STRING,103,'&Save...');
AppendMenu(Submenu,MF_SEPARATOR,0,Nil);
AppendMenu(SubMenu,MF_String,104,'E&xit');
AppendMenu(Menu,MF_POPUP,SubMenu,'&File');
SubMenu := CreateMenu;
AppendMenu(SubMenu,MF_String,201,'&Undo'#8'Ctrl+Z');
AppendMenu(Submenu,MF_SEPARATOR,0,Nil);
AppendMenu(SubMenu,MF_String,202,'&Cut'#8'Ctrl+X');
AppendMenu(SubMenu,MF_String,203,'&Copy'#8'Ctrl+C');
AppendMenu(SubMenu,MF_STRING,204,'&Paste'#8'Ctrl+V');
AppendMenu(Menu,MF_POPUP,SubMenu,'&Edit');
SubMenu := CreateMenu;
AppendMenu(Menu,MF_STRING,401,'&Help');
SetMenu(hWindow,menu);
ShowWindow(hWindow,SW_Show);
UpdateWindow(hWindow);
End;
WinCreate := hWindow;
End;
{********************************************************************}
Function StatusCreate (parent:hwnd): HWnd;
var
AWnd : HWnd;
Edges : array[1..2] of LongInt;
Begin
FileName := 'Unsaved';
AWnd := CreateStatusWindow(WS_CHILD or WS_VISIBLE,FileName,Parent,$7712);
// Create items:
if AWnd <> 0 then
begin
Edges[1] := 400;
Edges[2] := 500;
SendMessage(AWnd,SB_SETPARTS,2,LongInt(@Edges));
end;
StatusCreate := AWnd;
End;
{********************************************************************}
Begin
If Not WinRegister Then
Begin
MessageBox (0,'Register failed',Nil, mb_Ok);
End
Else
Begin
hWindow := WinCreate;
If longint(hWindow)=0 Then
Begin
MessageBox (0,'WinCreate failed',Nil,MB_OK);
End
Else
Begin
HStatus := statuscreate(hwindow);
HEdit := EditCreate(HWindow,HStatus);
SetFocus(HEdit);
While GetMessage(@AMessage,0,0,0) Do
Begin
TranslateMessage(AMessage);
DispatchMessage(AMessage);
End;
Halt(AMessage.wParam);
End;
End;
End.