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unit MySQLResultSetFieldViewer;
interface
uses
gnugettext, Windows, Messages, SysUtils, Variants, Classes,
Graphics, Controls, TntForms, Forms,
Dialogs, ExtCtrls, TntExtCtrls, ComCtrls, TntComCtrls,
AuxFuncs, myx_public_interface, StdCtrls, TntStdCtrls,
PNGImage, Jpeg, UniCodeEditor, TntSysUtils, MySQLResultSet;
type
TViewerMode = (ViewerModeView, ViewerModeEdit);
TViewerContentType = (
ViewerContentTypeNone,
ViewerContentTypeText,
ViewerContentTypeImage,
ViewerContentTypeBinary
);
TMySQLResultSetFieldViewerForm = class(TTntForm)
PageControl: TTntPageControl;
TextSheet: TTntTabSheet;
ImageSheet: TTntTabSheet;
TextMemo: TTntMemo;
BinarySheet: TTntTabSheet;
HexUniCodeEd: TUniCodeEdit;
PlainTextUniCodeEdit: TUniCodeEdit;
TntSplitter1: TTntSplitter;
ImageScrollBox: TTntScrollBox;
FieldImage: TTntImage;
TextSheetBtnPnl: TTntPanel;
OKBtn: TTntButton;
CancelBtn: TTntButton;
ImageSheetBtnPnl: TTntPanel;
Ok2Btn: TTntButton;
Cancel2Btn: TTntButton;
TntPanel1: TTntPanel;
OK3Btn: TTntButton;
Cancel3Btn: TTntButton;
ImageFormatTitleLbl: TTntLabel;
TntBevel1: TTntBevel;
ImageSizeTitleLbl: TTntLabel;
ImageFormatLbl: TTntLabel;
ImageSizeLbl: TTntLabel;
BinarySizeTitelLbl: TTntLabel;
BinarySizeLbl: TTntLabel;
procedure PlainTextUniCodeEditScroll(Sender: TCustomUnicodeEdit; DeltaX, DeltaY: Integer);
procedure HexUniCodeEdScroll(Sender: TCustomUnicodeEdit; DeltaX, DeltaY: Integer);
constructor Create(AOwner: TComponent; Mode: TViewerMode); reintroduce;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
FMode: TViewerMode;
FContentType: TViewerContentType;
FChanging: Boolean;
public
procedure SetContent(RSValue: TRSFieldValue);
property ContentType: TViewerContentType read FContentType;
end;
//----------------------------------------------------------------------------------------------------------------------
implementation
uses
ApplicationDataModule, Options;
{$R *.dfm}
//----------------------------------------------------------------------------------------------------------------------
constructor TMySQLResultSetFieldViewerForm.Create(AOwner: TComponent; Mode: TViewerMode);
begin
inherited Create(AOwner);
FMode := Mode;
if Mode = ViewerModeView then
begin
CancelBtn.Visible:=False;
OKBtn.Left:=CancelBtn.Left;
Cancel2Btn.Visible:=False;
OK2Btn.Left:=Cancel2Btn.Left;
Cancel3Btn.Visible:=False;
OK3Btn.Left:=Cancel3Btn.Left;
TextMemo.ReadOnly := True;
end;
FContentType:=ViewerContentTypeNone;
FieldImage.Left:=0;
FieldImage.Top:=0;
end;
//----------------------------------------------------------------------------------------------------------------------
procedure TMySQLResultSetFieldViewerForm.FormCreate(Sender: TObject);
begin
InitForm(Self);
ApplicationDM.Options.RestoreWindowPos(Self);
Font.Name := MYXCommonOptions.DataFontName;
PageControl.ActivePageIndex := 0;
end;
//----------------------------------------------------------------------------------------------------------------------
procedure TMySQLResultSetFieldViewerForm.FormDestroy(Sender: TObject);
begin
ApplicationDM.Options.AddWindowPos(self);
end;
//----------------------------------------------------------------------------------------------------------------------
procedure TMySQLResultSetFieldViewerForm.SetContent(RSValue: TRSFieldValue);
var
ImgFormat: MYX_IMAGE_FORMAT;
MemStream: TMemoryStream;
PNGImage: TPNGObject;
JPEGImage: TJPEGImage;
Data: String;
Buffer: PChar;
i, j: Integer;
s, s1: WideString;
c: Char;
begin
ImageSheet.TabVisible := False;
TextSheet.TabVisible := False;
BinarySizeLbl.Caption := FormatFloat('###,###,###', RSValue.Length) + ' ' + _('Bytes');
if(RSValue.BinaryData)then
begin
ImgFormat := myx_guess_image_format(RSValue.Value, RSValue.Length);
if (ImgFormat <> MYX_IMG_UNKNOWN) and (ImgFormat <> MYX_IMG_GIF) then
begin
ImageSheet.TabVisible := True;
PageControl.ActivePage := ImageSheet;
FContentType:=ViewerContentTypeImage;
PageControl.ActivePage:=ImageSheet;
ImageSizeLbl.Caption := FormatFloat('###,###,###', RSValue.Length)+' '+_('Byte');
MemStream := TMemoryStream.Create;
try
SetString(Data, PChar(RSValue.Value), RSValue.Length);
if Data <> '' then
begin
MemStream.WriteBuffer(PChar(Data)^, RSValue.Length);
MemStream.Position := 0;
end;
case ImgFormat of
MYX_IMG_PNG:
begin
ImageFormatLbl.Caption := _('PNG');
PNGImage := TPNGObject.Create;
try
try
PNGImage.LoadFromStream(MemStream);
FieldImage.Picture.Assign(PNGImage);
except
ShowModalDialog(_('PNG image corrupted.'), _('The BLOB field contains a corrupted image file.'),
myx_mtError, 'Ok');
FieldImage.Picture.Bitmap.FreeImage;
end;
finally
PNGImage.Free;
end;
end;
MYX_IMG_JPEG:
begin
ImageFormatLbl.Caption := _('JPEG');
JPEGImage := TJPEGImage.Create;
try
try
JPEGImage.LoadFromStream(MemStream);
FieldImage.Picture.Assign(JPEGImage);
except
ShowModalDialog(_('JPG image corrupted.'), _('The BLOB field contains a corrupted image file.'),
myx_mtError, 'Ok');
FieldImage.Picture.Bitmap.FreeImage;
end;
finally
JPEGImage.Free;
end;
end;
MYX_IMG_BMP:
begin
ImageFormatLbl.Caption := _('BMP');
try
FieldImage.Picture.Bitmap.LoadFromStream(MemStream);
except
ShowModalDialog(_('JPG image corrupted.'), _('The BLOB field contains a corrupted image file.'),
myx_mtError, 'Ok');
FieldImage.Picture.Bitmap.FreeImage;
end;
end;
end;
FieldImage.Invalidate;
finally
MemStream.Free;
end;
FieldImage.Invalidate;
end;
end
else
begin
TextSheet.TabVisible := True;
PageControl.ActivePage := TextSheet;
FContentType:=ViewerContentTypeText;
if not RSValue.IsNull then
TextMemo.Text := TntAdjustLineBreaks(UTF8Decode(RSValue.Value))
else
TextMemo.Text := '';
ImageSheet.TabVisible := False;
end;
GetMem(Buffer, RSValue.Length*2+1);
try
BinToHex(PChar(RSValue.Value), Buffer, RSValue.Length);
j:=0;
i:=0;
s:='';
s1:='';
while(i<RSValue.Length*2)do
begin
s:=s+Buffer[i]+Buffer[i+1]+' ';
c:=RSValue.Value[i div 2];
if(c=#0)then
c:='0'
else if(c=#13)then
c:=''
else if(c=#10)then
c:=''
else if(c<#32)then
c:=' ';
s1:=s1+c;
inc(j);
if(j mod 4=0)and(j<16)then
s:=s+'|';
if(j=16)then
begin
j:=0;
HexUniCodeEd.Content.AddLine(s);
PlainTextUniCodeEdit.Content.AddLine(s1);
s:='';
s1:='';
end;
inc(i, 2);
end;
if s<>'' then
begin
HexUniCodeEd.Content.AddLine(s);
PlainTextUniCodeEdit.Content.AddLine(s1);
end;
finally
FreeMem(Buffer);
end;
end;
//----------------------------------------------------------------------------------------------------------------------
procedure TMySQLResultSetFieldViewerForm.HexUniCodeEdScroll(Sender: TCustomUnicodeEdit; DeltaX, DeltaY: Integer);
begin
if not FChanging then
begin
FChanging := True;
try
HexUniCodeEd.Update;
PlainTextUniCodeEdit.OffsetY := HexUniCodeEd.OffsetY;
PlainTextUniCodeEdit.Update;
finally
FChanging := False;
end;
end;
end;
//----------------------------------------------------------------------------------------------------------------------
procedure TMySQLResultSetFieldViewerForm.PlainTextUniCodeEditScroll(Sender: TCustomUnicodeEdit; DeltaX, DeltaY: Integer);
begin
if not FChanging then
begin
FChanging := True;
try
PlainTextUniCodeEdit.Update;
HexUniCodeEd.OffsetY := PlainTextUniCodeEdit.OffsetY;
HexUniCodeEd.Update;
finally
FChanging := False;
end;
end;
end;
//----------------------------------------------------------------------------------------------------------------------
end.
|
