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| unit UUSBStorage;
interface
uses Windows, Messages, SysUtils, Classes, Forms, Dialogs,Math;
const
DBT_DEVICEARRIVAL = $8000; // le système détecte un nouveau périphérique
DBT_DEVICEREMOVECOMPLETE = $8004; // le périphérique à été retiré
DBT_DEVTYP_VOLUME = $00000002; // type du périphérique
type
PDevBroadcastHdr = ^DEV_BROADCAST_HDR;
PDevBroadcastHeader = PDevBroadcastHdr;
DEV_BROADCAST_HDR = packed record
dbch_size: DWORD;
dbch_devicetype: DWORD;
dbch_reserved: DWORD;
end;
PDevBroadcastVolume = ^DEV_BROADCAST_VOLUME;
DEV_BROADCAST_VOLUME = packed record
dbch_size: DWORD;
dbch_devicetype: DWORD;
dbch_reserved: DWORD;
dbcv_unitmask: DWORD; // Sert à récupérer la lettre du lecteur
dbcv_flags: WORD; // 0 = Affectation de la lecteur par le périphérique (clé USB)
// 1 = Lettre Changée Automatique (Lecteur de CD-ROM / DVD-ROM)
end;
type
TTypeSizeOf = (tsoAutomatic, tsoByte, tsoKiloByte, tsoMegaByte, tsoGigabyte, tsoTeraByte);
TMediaType = (mtAll, mtCDandDVD, mtFlashDisk);
TUSBStorage = class(TComponent)
private
FDeviceLetter: Char;
FVolName: Array[0..Max_Path]Of Char;
FileSysName : Array[0..Max_Path]Of Char;
FVolSerial : DWord;
FileMaxLen : DWord;
FileFlags : DWord;
FFreeSpace : double;
FSize : double;
FBusySpace: double;
FWindowHandle: HWND;
FOnUSBConnect: TNotifyEvent;
FOnUSBDisconnect: TNotifyEvent;
FMediaTypeSelected:TMediaType;
FShowSizeType:boolean;
FSizeTypeOf:TTypeSizeOf;
procedure WndProc(var Msg: TMessage);
function FormatSize(Value: Double; TypeSizeReturn: TTypeSizeOf; Precision:integer): string;
function FormatSizeF(Value: Double; TypeSizeReturn: TTypeSizeOf; Precision:integer): Double;
protected
procedure WMDeviceChange(var Msg: TMessage); dynamic;
public
function GetFreeSpaceF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
function GetBusySpaceF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
function GetSizeF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
function GetFreeSpace(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): string;
function GetBusySpace(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): string;
function GetSize(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): string;
function VolumeName:String;
function FileSystem:String;
property SizeType: TTypeSizeOf read FSizeTypeOf;
property SerialVolume: Cardinal read FVolSerial;
property LetterDevice: Char read FDeviceLetter;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
property MediaType:TMediaType read FMediaTypeSelected write FMediaTypeSelected;
property ShowSizeType:boolean read FShowSizeType write FShowSizeType;
property OnUSBConnect: TNotifyEvent read FOnUSBConnect write FOnUSBConnect;
property OnUSBDisconnect: TNotifyEvent read FOnUSBDisconnect write FOnUSBDisconnect;
end;
procedure Register;
implementation
procedure Register;
begin
RegisterComponents('JlnCompo',[TUSBStorage]);
end;
{==============================================================================}
{ TMediaConnected }
{==============================================================================}
{------------------------------------------------------------------------------}
{*************************************************************************}
{ Fonction qui formate la taille }
{ - tsoAutomatic : Choix automatique du format de sortie (o,Ko,Mo,Go,To) }
{ - tsoByte : Retour de la taille en Byte }
{ - tsoKiloByte : Retour de la taille en KiloByte }
{ - tsoMegaByte : Retour de la taille en MegaByte }
{ - tsoGigaByte : Retour de la taille en GigaByte }
{ - tsoTeraByte : Retour de la taille en TeraByte }
{*************************************************************************}
function TUSBStorage.FormatSizeF(Value: Double; TypeSizeReturn: TTypeSizeOf; Precision:integer): Double;
begin
FFreeSpace:=DiskFree(Ord(FDeviceLetter)-64);
FSize:=DiskSize(Ord(FDeviceLetter)-64);
FBusySpace:= FSize - FFreeSpace;
if Precision > 8 then
Precision := 8
else
begin
if Precision < 0 then
Precision := 0
end;
case TypeSizeReturn of
tsoAutomatic:
begin
if ((value > 1024) and (value < Power(1024,2))) then
begin
Result:= RoundTo((Value / 1024),-Precision);
FSizeTypeOf:=tsoKiloByte;
end
else
begin
if ((value > Power(1024,2)) and (value < Power(1024,3))) then
begin
Result := RoundTo((Value / Power(1024,2)),-Precision);
FSizeTypeOf:=tsoMegaByte;
end
else
begin
if ((value > Power(1024,3)) and (value < Power(1024,4))) then
begin
Result := RoundTo((Value / Power(1024,3)),-Precision);
FSizeTypeOf:=tsoGigabyte;
end
else
begin
if (value > Power(1024,4)) then
begin
Result := RoundTo((Value / Power(1024,4)),-Precision);
FSizeTypeOf:=tsoTeraByte;
end
else
begin
Result := RoundTo(Value,-Precision);
FSizeTypeOf:=tsoByte;
end;
end;
end;
end;
end;
tsoByte:
begin
Result := RoundTo(Value,-Precision);
FSizeTypeOf:=tsoByte;
end;
tsoKiloByte:
begin
Result := RoundTo((Value / 1024),-Precision);
FSizeTypeOf:=tsoKiloByte;
end;
tsoMegaByte:
begin
Result := RoundTo((Value / Power(1024,2)),-Precision);
FSizeTypeOf:=tsoMegaByte;
end;
tsoGigabyte:
begin
Result := RoundTo((Value / Power(1024,3)),-Precision);
FSizeTypeOf:=tsoGigabyte;
end
else
begin
Result := RoundTo((Value / Power(1024,4)),-Precision);
FSizeTypeOf:=tsoTeraByte;
end;
end;
end;
//------------------------------------------------------------------------------
{*****************************************************************************************}
{ Fonction qui formate la taille : Si FIsTrue alors affichage en plus du format de sortie }
{ - tsoAutomatic : Choix automatique du format de sortie (o,Ko,Mo,Go,To) }
{ - tsoByte : Retour de la taille en Byte }
{ - tsoKiloByte : Retour de la taille en KiloByte }
{ - tsoMegaByte : Retour de la taille en MegaByte }
{ - tsoGigaByte : Retour de la taille en GigaByte }
{ - tsoTeraByte : Retour de la taille en TeraByte }
{*****************************************************************************************}
function TUSBStorage.FormatSize(Value: Double; TypeSizeReturn: TTypeSizeOf; Precision:integer): string;
begin
if Precision > 8 then
Precision := 8
else
begin
if Precision < 0 then
Precision := 0
end;
case TypeSizeReturn of
tsoAutomatic:
begin
if ((value > 1024) and (value < Power(1024,2))) then
begin
Result:= FloatToStr(RoundTo((Value / 1024),-Precision));
if FShowSizeType then
Result:= Result + ' Ko';
FSizeTypeOf:=tsoKiloByte;
end
else
begin
if ((value > Power(1024,2)) and (value < Power(1024,3))) then
begin
Result := FloatToStr(RoundTo((Value / Power(1024,2)),-Precision));
if FShowSizeType then
Result:= Result + ' Mo';
FSizeTypeOf:=tsoMegaByte;
end
else
begin
if ((value > Power(1024,3)) and (value < Power(1024,4))) then
begin
Result := FloatToStr(RoundTo((Value / Power(1024,3)),-Precision));
if FShowSizeType then
Result:= Result + ' Go';
FSizeTypeOf:=tsoGigabyte;
end
else
begin
if (value > Power(1024,4)) then
begin
Result := FloatToStr(RoundTo((Value / Power(1024,4)),-Precision));
if FShowSizeType then
Result:= Result + ' To';
FSizeTypeOf:=tsoTeraByte;
end
else
begin
Result := FloatToStr(RoundTo(Value,-Precision));
if FShowSizeType then
Result:= Result + ' o';
FSizeTypeOf:=tsoByte;
end;
end;
end;
end;
end;
tsoByte:
begin
Result := FloatToStr(RoundTo(Value,-Precision));
if FShowSizeType then
Result:=Result+ ' o';
FSizeTypeOf:=tsoByte;
end;
tsoKiloByte:
begin
Result := FloatToStr(RoundTo((Value / 1024),-Precision));
if FShowSizeType then
Result:= Result + ' Ko';
FSizeTypeOf:=tsoKiloByte;
end;
tsoMegaByte:
begin
Result := FloatToStr(RoundTo((Value / Power(1024,2)),-Precision));
if FShowSizeType then
Result:= Result + ' Mo';
FSizeTypeOf:=tsoMegaByte;
end;
tsoGigabyte:
begin
Result := FloatToStr(RoundTo((Value / Power(1024,3)),-Precision));
if FShowSizeType then
Result:= Result + ' Go';
FSizeTypeOf:=tsoGigabyte;
end;
else
begin
Result := FloatToStr(RoundTo((Value / Power(1024,4)),-Precision));
if FShowSizeType then
Result:= Result + ' To';
FSizeTypeOf:=tsoTeraByte;
end;
end;
end;
//------------------------------------------------------------------------------
function TUSBStorage.VolumeName:string;
begin
Result:=FVolName;
end;
function TUSBStorage.FileSystem:string;
begin
Result:=FileSysName;
end;
{**************}
{ Constructeur }
{**************}
constructor TUSBStorage.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FWindowHandle := Classes.AllocateHWnd(WndProc);
end;
//------------------------------------------------------------------------------
{*************}
{ Destructeur }
{*************}
destructor TUSBStorage.Destroy;
begin
Classes.DeallocateHWnd(FWindowHandle);
inherited Destroy;
end;
//------------------------------------------------------------------------------
procedure TUSBStorage.WndProc(var Msg: TMessage);
begin
if (Msg.Msg = WM_DEVICECHANGE) then
begin
try
WMDeviceChange(Msg);
except
Application.HandleException(Self);
end;
end
else
Msg.Result := DefWindowProc(FWindowHandle, Msg.Msg, Msg.wParam, Msg.lParam);
end;
//------------------------------------------------------------------------------
{*******************************************************************}
{ Message qui est envoyé lors d'insertion de média USB / CD-ROM ... }
{*******************************************************************}
procedure TUSBStorage.WMDeviceChange(var Msg: TMessage);
var
PHeader : PDevBroadcastHeader;
PData : PDevBroadcastVolume;
Index : Integer;
begin
inherited;
PHeader:=PDevBroadcastHeader(Msg.lParam);
FDeviceLetter:=#0;
case Msg.WParam of
// On a inséré un média
DBT_DEVICEARRIVAL :
begin
// On teste si c'est un volume
if (PHeader^.dbch_devicetype = DBT_DEVTYP_VOLUME) then
begin
if (((FMediaTypeSelected = mtFlashDisk) and (PDevBroadcastVolume( Msg.LParam )^.dbcv_flags = 0))
or ((FMediaTypeSelected = mtCDAndDVD) and (PDevBroadcastVolume( Msg.LParam )^.dbcv_flags = 1))
or (FMediaTypeSelected = mtAll)) then
begin
PData:=PDevBroadcastVolume(Msg.lParam);
for Index:=0 to 25 do
if ((PData^.dbcv_unitmask shr Index) = 1) then
begin
FDeviceLetter:=Chr(65+Index);
break;
end;
// Récupération de diverses informations sur le média
if GetVolumeInformation(PChar(FDeviceLetter+':\'),@FVolName,Max_Path,@FVolSerial, FileMaxLen, FileFlags,FileSysName,Max_Path) then
begin
FFreeSpace:=DiskFree(Ord(FDeviceLetter)-64);
FSize:=DiskSize(Ord(FDeviceLetter)-64);
FBusySpace:= FSize - FFreeSpace;
end;
if Assigned(FOnUSBConnect) then
FOnUSBConnect(Self);
end;
end;
end;
// On a déconnecté un média
DBT_DEVICEREMOVECOMPLETE:
begin
if (PHeader^.dbch_devicetype = DBT_DEVTYP_VOLUME) then
begin
if (PHeader^.dbch_devicetype = DBT_DEVTYP_VOLUME) then
begin
if (((FMediaTypeSelected = mtFlashDisk) and (PDevBroadcastVolume( Msg.LParam )^.dbcv_flags = 0))
or ((FMediaTypeSelected = mtCDAndDVD) and (PDevBroadcastVolume( Msg.LParam )^.dbcv_flags = 1))
or (FMediaTypeSelected = mtAll)) then
begin
PData:=PDevBroadcastVolume(Msg.lParam);
for Index:=0 to 25 do
if ((PData^.dbcv_unitmask shr Index) = 1) then
begin
FDeviceLetter:=Chr(65+Index);
break;
end;
if Assigned(FOnUSBDisconnect) then
FOnUSBDisconnect(Self);
end;
end;
end;
end;
end;
end;
//------------------------------------------------------------------------------
{***********************************************}
{ fonction qui retourne l'espace libre du média }
{***********************************************}
function TUSBStorage.GetFreeSpace(TypeSizeReturn: TTypeSizeOf = tsoKiloByte;Precision:integer=2): string;
begin
result := FormatSize(FFreeSpace, TypeSizeReturn, Precision);
end;
//------------------------------------------------------------------------------
{************************************************}
{ fonction qui retourne l'espace occupé du média }
{************************************************}
function TUSBStorage.GetBusySpace(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): string;
begin
result := FormatSize(FBusySpace, TypeSizeReturn, Precision);
end;
//------------------------------------------------------------------------------
{************************************************}
{ fonction qui retourne l'espace disque du média }
{************************************************}
function TUSBStorage.GetSize(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): string;
begin
result := FormatSize(FSize, TypeSizeReturn, Precision);
end;
//------------------------------------------------------------------------------
{***************************************************************************************}
{ fonction qui retourne l'espace libre du média (type de sortie : chaine de caractères) }
{***************************************************************************************}
function TUSBStorage.GetFreeSpaceF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
begin
result := FormatSizeF(FFreeSpace, TypeSizeReturn, Precision);
end;
//------------------------------------------------------------------------------
{****************************************************************************************}
{ fonction qui retourne l'espace occupé du média (type de sortie : chaine de caractères) }
{****************************************************************************************}
function TUSBStorage.GetBusySpaceF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
begin
result := FormatSizeF(FBusySpace, TypeSizeReturn, Precision);
end;
//------------------------------------------------------------------------------
{****************************************************************************************}
{ fonction qui retourne l'espace disque du média (type de sortie : chaine de caractères) }
{****************************************************************************************}
function TUSBStorage.GetSizeF(TypeSizeReturn: TTypeSizeOf = tsoKiloByte; Precision:integer=2): Double;
begin
result := FormatSizeF(FSize, TypeSizeReturn, Precision);
end;
end. |
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