unit mainUnit;
interface
uses
Windows, Messages,
SysUtils, Classes, Graphics, Controls, Forms,
Dialogs,
ExtDlgs, StdCtrls,
ComCtrls, ExtCtrls, Buttons;
type
TForml = class(TForm)
SavePictureDialogl:
TSavePictureDialog;
OpenPictureDialogl:
TOpenPictureDialog;
ScrollBoxl:
TScrollBox; Imagel: TImage;
ProgressBari: TProgressBar;
OpenBitBtn:
TBitBtn;
SaveBitBtn:
TBitBtn;
procedure SavePictureDialoglTypeChange(Sender:
TObject);
procedure ImagelProgress(Sender:
TObject; Stage: TProgressStage;
PercentDone:
Byte;
RedrawNow: Boolean;
const R: TRect;
const Msg: String);
procedure SavePictureDialoglClose(Sender:
TObject);
procedure FormCreate(Sender:
TObject);
procedure SavePictureDialoglShow(Sender:
TObject);
procedure OpenBitBtnClick(Sender:
TObject);
procedure SaveBitBtnClick(Sender:
TObject);
private
public
end;
var
Forml: TForml;
implementation
{$R *.DFM}
uses jpeg;
const DeltaH : Integer
= 80;
var Quality : TJpegQualityRange;
ProgressiveEnc :
Boolean;
procedure TForml.OpenBitBtnClick(Sender:
TObject);
begin
if OpenPictureDialogl.Execute
then Imagel.Picture.LoadFromFile
(OpenPictureDialogl.FileName);
end;
procedure TForml.SaveBitBtnClick(Sender:
TObject);
var ji : TJpeglmage;
begin
if SavePictureDialogl.Execute
then
begin
ji := TJpeglmage.Create;
ji.CompressionQuality
:= Quality;
ji.ProgressiveEncoding
:= ProgressiveEnc;
j i.Assign(Imagel.Picture.Bitmap);
ji.SaveToFile(SavePictureDialogl.FileName);
ji.Free;
end;
end;
procedure TForml.SavePictureDialoglTypeChange(Sender:
TObject);
var ParentHandle:THandle;wRect:TRect;
PicPanel,PaintPanel:TPanel;JEdit
: TEdit;
Expanded : boolean;
begin
With Sender as TSavePictureDialog
do
begin
PicPanel := (FindComponent('PicturePanel')
as TPanel);
if not Assigned(PicPanel)
then Exit;
ParentHandle:=GetParent(Handle);
PaintPanel:=(FindComponent('PaintPanel')
as TPanel);
PaintPanel.Align
:= alNone;
Expanded :=
FindComponent('JLabel') <> nil;
if Filterlndex
>1 then begin if not Expanded then
begin
GetWindowRect(ParentHandle,WRect);
SetWindowPos(ParentHandle,0,0,0,
WRect.Right-WRect.Left,
WRect.Bottom-WRect.Top+DeltaH,
SWP_NOMOVE+SWP_NOZORDER);
GetWindowRect(Handle,WRect);
SetWindowPos(handle,0,0,0,WRect.Right-
WRect.Left,
WRect.Bottom-WRect.Top+DeltaH,
SWP_NOMOVE+SWP_NOZORDER);
Expanded:=True;
PicPanel.Height :=
PicPanel.Height+DeltaH;
if FindComponent('JLabel')=nil
then with TLabel.Create(Sender
as TSavePictureDialog) do
begin
Parent := PicPanel;
Name := 'JLabel';
Caption := 'Quality';
Left := 5;
Height := 25;
Top := PaintPanel.Top+PaintPanel.Height+5;
end;
if FindComponent('JEdit')=nil
then
begin
JEdit := TEdit.Create(Sender
as TSavePictureDialog);
with JEdit do
begin
Parent := PicPanel;
Name:='JEdit';
Text := '75';
Left:-50;Width :=
50;
Height := 25;
Top := PaintPanel.Top+PaintPanel.Height+5;
end;
end;
if FindComponent('JUpDown')=nil
then
with TUpDown.Create(Sender
as TSavePictureDialog) do
begin
Parent := PicPanel;
Name:='JUpDown';
Associate := JEdit;
Increment := 5;
Min := 1; Max :=
100;
Position := 75; end;
if FindComponent('JCheck')=nil
then
with TCheckBox.Create(Sender
as TSavePictureDialog) do
begin
Name: = 'JCheck';
Caption:='Progressive
Encoding'; Parent:=PicPanel;
Left:=5;Width :=
PicPanel.Width - 10; Height:=25;
Top := PaintPanel.Top+PaintPanel.Height+35;
end;
end;
end
else
SavePictureDialoglClose(Sender);
end;
end;
procedure TForml.ImagelProgress(Sender:
TObject; Stage: TProgressStage;
PercentDone:
Byte; RedrawNow: Boolean; const R: TRect;
const Msg: String);
begin
case Stage of psStarting:
begin
Progressbarl.Position
:= 0;
Progressbarl.Max
:= 100;
end;
psEnding: begin
Progressbarl.Position
:= 0;
end;
psRunning: begin
Progressbarl.Position
:= PercentDone;
end;
end;
end;
procedure TForml.SavePictureDialoglClose(Sender:
TObject);
var PicPanel
: TPanel; ParentHandle : THandle; WRect : TRect;
begin
With Sender as TSavePictureDialog
do
begin
PicPanel := (FindComponent('PicturePanel')
as TPanel);
if not Assigned(PicPanel)
then Exit; ParentHandle:=GetParent(Handle);
if ParentHandle=0
then Exit;
if FindComponent('JLabel')onil
then
begin
FindComponent('JLabel').Free;
FindComponent('JEdit').Free;
ProgressiveEnc :=
(FindComponent('JCheck1) as TCheckBox).Checked; FindComponent('JCheck').Free;
Quality := (FindComponent('JUpDown')
as TUpDown).Position; FindComponent('JUpDown').Free;
PicPanel.Height:=PicPanel.Height-DeltaH;
GetWindowRect(Handle,WRect);
SetWindowPos(Handle,0,0,0,WRect.Right-WRect.Left,
WRect.Bottom-WRect.Top-DeltaH,
SWP_NOMOVE+SWP_NOZORDER);
GetWindowRect(ParentHandle,WRect);
SetWindowPos(ParentHandle,0,0,0,
WRect.Right-WRect.Left,
WRect.Bottom-WRect.Top-DeltaH,
SWP_NOMOVE+SWP_NOZORDER);
Filterlndex := 1;
end;
end;
end;
procedure TForml.FormCreate(Sender:
TObject);
var s: string;
begin
s :=GraphicFilter(TBitmap)+'|'+
GraphicFilter(TJpeglmage);
OpenPictureDialogl.Filter
:= s;
SavePictureDialogl.Filter
:= s;
end;
procedure TForml.SavePictureDialoglShow(Sender:
TObject);
begin
with Sender as TSavePictureDialog
do
begin
if FindComponent('JLabel')Onil
then
begin
FilterIndex := 2;
SavePictureDialoglTypeChange(Sender)
;
end;
end;
end;
end.
