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| (*****************************************
Sorry, no comments.
Any question, feel free to e-mail me :
Cezar Lenci
sintesis@dglnet.com.br
******************************************)
unit PageSetup;
interface
Uses
Windows,Forms,CommDlg,Printers,SysUtils,Messages,Dialogs,Classes;
Type
TPageSetupFlags = (poDefaultMinMargins,poDisableMargins,poMargins,poMinMargins,
poDisableOrientation,poDisablePaper,poDisablePrinter,
poHundredthsOfMillimeters,poThousandthsOfInches);
TPageOptions = Set Of TPageSetupFlags;
TPageSetupDialog = class(TCommonDialog)
private
FOptions : TPageOptions;
FFlags : Longint;
FMarginLeft,
FMarginTop,
FMarginRight,
FMarginBottom,
FMinMarginLeft,
FMinMarginTop,
FMinMarginRight,
FMinMarginBottom : Integer;
FPaperLength,
FPaperWidth : Short;
procedure SetOptions(Value : TPageOptions);
procedure SetLeft(Value : Integer);
procedure SetTop(Value : Integer);
procedure SetRight(Value : Integer);
procedure SetBottom(Value : Integer);
procedure SetMinLeft(Value : Integer);
procedure SetMinTop(Value : Integer);
procedure SetMinRight(Value : Integer);
procedure SetMinBottom(Value : Integer);
public
constructor Create(AOwner : TComponent); override;
procedure Execute;
procedure GetDefaults;
Published
Property Options : TPageOptions Read FOptions Write SetOptions;
Property MarginLeft : Integer Read FMarginLeft Write SetLeft;
Property MarginTop : Integer Read FMarginTop Write SetTop;
Property MarginRight : Integer Read FMarginRight Write SetRight;
Property MarginBottom : Integer Read FMarginBottom Write SetBottom;
Property MinMarginLeft : Integer Read FMinMarginLeft Write SetMinLeft;
Property MinMarginTop : Integer Read FMinMarginTop Write SetMinTop;
Property MinMarginRight : Integer Read FMinMarginRight Write SetMinRight;
Property MinMarginBottom : Integer Read FMinMarginBottom Write SetMinBottom;
Property PaperLength : Short Read FPaperLength;
Property PaperWidth : Short Read FPaperWidth;
end;
Procedure Register;
implementation
procedure CenterWindow(Wnd: HWnd);
var
Rect: TRect;
begin
GetWindowRect(Wnd, Rect);
SetWindowPos(Wnd, 0,
(GetSystemMetrics(SM_CXSCREEN) - Rect.Right + Rect.Left) div 2,
(GetSystemMetrics(SM_CYSCREEN) - Rect.Bottom + Rect.Top) div 3,
0, 0, SWP_NOACTIVATE or SWP_NOSIZE or SWP_NOZORDER);
end;
function DialogHook(Wnd: HWnd; Msg: UINT; WParam: WPARAM; LParam: LPARAM): UINT; stdcall;
begin
Result := 0;
case Msg of
WM_INITDIALOG:
begin
CenterWindow(Wnd);
Result := 1;
end;
end;
end;
function TaskModalDialog(DialogFunc: Pointer; var DialogData): Bool;
type
TDialogFunc = function(var DialogData): Bool stdcall;
var
ActiveWindow: HWnd;
WindowList: Pointer;
begin
ActiveWindow := GetActiveWindow;
WindowList := DisableTaskWindows(0);
try
Result := TDialogFunc(DialogFunc)(DialogData);
finally
EnableTaskWindows(WindowList);
SetActiveWindow(ActiveWindow);
end;
end;
procedure GetPrinter(var DeviceMode, DeviceNames: THandle);
var
Device, Driver, Port: array[0..79] of char;
DevNames: PDevNames;
Offset: PChar;
begin
Printer.GetPrinter(Device, Driver, Port, DeviceMode);
if DeviceMode <> 0 then
begin
DeviceNames := GlobalAlloc(GHND, SizeOf(TDevNames) +
StrLen(Device) + StrLen(Driver) + StrLen(Port) + 3);
DevNames := PDevNames(GlobalLock(DeviceNames));
try
Offset := PChar(DevNames) + SizeOf(TDevnames);
with DevNames^ do
begin
wDriverOffset := Longint(Offset) - Longint(DevNames);
Offset := StrECopy(Offset, Driver) + 1;
wDeviceOffset := Longint(Offset) - Longint(DevNames);
Offset := StrECopy(Offset, Device) + 1;
wOutputOffset := Longint(Offset) - Longint(DevNames);;
StrCopy(Offset, Port);
end;
finally
GlobalUnlock(DeviceNames);
end;
end;
end;
function CopyData(Handle: THandle): THandle;
var
Src, Dest: PChar;
Size: Integer;
begin
if Handle <> 0 then
begin
Size := GlobalSize(Handle);
Result := GlobalAlloc(GHND, Size);
if Result <> 0 then
try
Src := GlobalLock(Handle);
Dest := GlobalLock(Result);
if (Src <> nil) and (Dest <> nil) then Move(Src^, Dest^, Size);
finally
GlobalUnlock(Handle);
GlobalUnlock(Result);
end
end
else Result := 0;
end;
constructor TPageSetupDialog.Create(AOwner : TComponent);
begin
inherited Create(AOwner);
FOptions := [poDefaultMinMargins,poHundredthsOfMillimeters];
End;
procedure TPageSetupDialog.Execute;
var
PageDlgRec: TPageSetupDlg;
DevHandle: THandle;
begin
FillChar(PageDlgRec, SizeOf(PageDlgRec), 0);
with PageDlgRec do
begin
lStructSize := SizeOf(PageDlgRec);
hInstance := System.HInstance;
GetPrinter(DevHandle,hDevNames);
hDevMode := CopyData(DevHandle);
rtMargin := Rect(MarginLeft,MarginTop,MarginRight,MarginBottom);
rtMinMargin := Rect(MinMarginLeft,MinMarginTop,MinMarginRight,MinMarginBottom);
Flags := PSD_ENABLEPAGESETUPHOOK or FFlags;
hWndOwner := Application.Handle;
lpfnPageSetupHook := DialogHook;
End;
TaskModalDialog(@PageSetupDlg, PageDlgRec);
with PageDlgRec do
begin
MarginLeft := rtMargin.Left;
MarginTop := rtMargin.Top;
MarginRight := rtMargin.Right;
MarginBottom := rtMargin.Bottom;
End;
end;
procedure TPageSetupDialog.GetDefaults;
var
PageDlgRec: TPageSetupDlg;
DevHandle: THandle;
begin
FillChar(PageDlgRec, SizeOf(PageDlgRec), 0);
with PageDlgRec do
begin
lStructSize := SizeOf(PageDlgRec);
hInstance := System.HInstance;
GetPrinter(DevHandle,hDevNames);
rtMargin := Rect(MarginLeft,MarginTop,MarginRight,MarginBottom);
rtMinMargin := Rect(MinMarginLeft,MinMarginTop,MinMarginRight,MinMarginBottom);
Flags := PSD_RETURNDEFAULT or PSD_ENABLEPAGESETUPHOOK or FFlags;
hWndOwner := Application.Handle;
lpfnPageSetupHook := DialogHook;
End;
TaskModalDialog(@PageSetupDlg, PageDlgRec);
with PageDlgRec do
begin
MarginLeft := rtMargin.Left;
MarginTop := rtMargin.Top;
MarginRight := rtMargin.Right;
MarginBottom := rtMargin.Bottom;
End;
end;
procedure TPageSetupDialog.SetOptions(Value : TPageOptions);
Begin
If (poDefaultMinMargins in Value) And Not (poDefaultMinMargins in FOptions) Then
Value := Value - [poMinMargins];
If (poMinMargins in Value) And Not (poMinMargins in FOptions) Then
Value := Value - [poDefaultMinMargins];
If (poHundredthsOfMillimeters in Value) And Not (poHundredthsOfMillimeters in FOptions) Then
Value := Value - [poThousandthsOfInches];
If (poThousandthsOfInches in Value) And Not (poThousandthsOfInches in FOptions) Then
Value := Value - [poHundredthsOfMillimeters];
FOptions := Value;
FFlags := 0;
If poDefaultMinMargins in FOptions then
FFlags := FFlags or PSD_DEFAULTMINMARGINS;
If poDisableMargins in FOptions then
FFlags := FFlags or PSD_DISABLEMARGINS;
If poMargins in FOptions then
FFlags := FFlags or PSD_MARGINS;
If poMinMargins in FOptions then
FFlags := FFlags or PSD_MINMARGINS;
If poDisableOrientation in FOptions then
FFlags := FFlags or PSD_DISABLEORIENTATION;
If poDisablePaper in FOptions then
FFlags := FFlags or PSD_DISABLEPAPER;
If poDisablePrinter in FOptions then
FFlags := FFlags or PSD_DISABLEPRINTER;
If poHundredthsOfMillimeters in FOptions then
FFlags := FFlags or PSD_INHUNDREDTHSOFMILLIMETERS;
If poThousandthsOfInches in FOptions then
FFlags := FFlags or PSD_INTHOUSANDTHSOFINCHES;
End;
procedure TPageSetupDialog.SetLeft(Value : Integer);
Begin
If Value > FMinMarginLeft Then
FMarginLeft := Value;
End;
procedure TPageSetupDialog.SetTop(Value : Integer);
Begin
If Value >= FMinMarginTop Then
FMarginTop := Value;
End;
procedure TPageSetupDialog.SetRight(Value : Integer);
Begin
If Value >= FMinMarginRight Then
FMarginRight := Value;
End;
procedure TPageSetupDialog.SetBottom (Value : Integer);
Begin
If Value >= FMinMarginBottom Then
FMarginBottom := Value;
End;
procedure TPageSetupDialog.SetMinLeft(Value : Integer);
Begin
If Value <= FMarginLeft Then
FMinMarginLeft := Value;
End;
procedure TPageSetupDialog.SetMinTop(Value : Integer);
Begin
If Value <= FMarginTop Then
FMinMarginTop := Value;
End;
procedure TPageSetupDialog.SetMinRight(Value : Integer);
Begin
If Value <= FMarginRight Then
FMinMarginRight := Value;
End;
procedure TPageSetupDialog.SetMinBottom (Value : Integer);
Begin
If Value <= FMarginBottom Then
FMinMarginBottom := Value;
Self.GetDefaults;
End;
Procedure Register;
Begin
RegisterComponents('Dialogs',[TPageSetupDialog]);
End;
end. |
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