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unit main;
{$mode objfpc}{$H+}
interface
uses
SysUtils, Classes, fpg_base, fpg_main, fpg_form, fpg_panel, fpg_button,
fpg_radiobutton, fpg_dialogs, fpg_imgfmt_jpg;
type
TfrmMain = class(TfpgForm)
private
{@VFD_HEAD_BEGIN: frmMain}
Panel1: TfpgPanel;
RadioButton1: TfpgRadioButton;
RadioButton2: TfpgRadioButton;
RadioButton3: TfpgRadioButton;
RadioButton4: TfpgRadioButton;
Button1: TfpgButton;
Button2: TfpgButton;
{@VFD_HEAD_END: frmMain}
FImage: TfpgImage;
FImageName: string;
SizeSelect: integer;
procedure Btn1Click(Sender: TObject);
procedure Btn2Click(Sender: TObject);
procedure rbChanged(Sender: TObject);
procedure FormPaint(Sender: TObject);
procedure LoadImage;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure AfterCreate; override;
end;
{@VFD_NEWFORM_DECL}
var frmMain: TfrmMain;
implementation
{@VFD_NEWFORM_IMPL}
procedure TfrmMain.AfterCreate;
begin
{%region 'Auto-generated GUI code' -fold}
{@VFD_BODY_BEGIN: frmMain}
Name := 'frmMain';
SetPosition(321, 289, 330, 380);
WindowTitle := 'JPEG Image Test';
WindowPosition := wpOneThirdDown;
Hint := '';
Panel1 := TfpgPanel.Create(self);
with Panel1 do
begin
Name := 'Panel1';
SetPosition(16, 260, 96, 112);
FontDesc := '#Label1';
Hint := '';
Text := '';
end;
RadioButton1 := TfpgRadioButton.Create(Panel1);
with RadioButton1 do
begin
Name := 'RadioButton1';
SetPosition(8, 8, 80, 20);
Checked := True;
FontDesc := '#Label1';
GroupIndex := 0;
Hint := '';
TabOrder := 1;
Text := 'Full size';
Tag:=1;
OnChange := @rbChanged;
end;
RadioButton2 := TfpgRadioButton.Create(Panel1);
with RadioButton2 do
begin
Name := 'RadioButton2';
SetPosition(8, 32, 72, 20);
FontDesc := '#Label1';
GroupIndex := 0;
Hint := '';
TabOrder := 1;
Text := '1/2 size';
Tag:=2;
OnChange := @rbChanged;
end;
RadioButton3 := TfpgRadioButton.Create(Panel1);
with RadioButton3 do
begin
Name := 'RadioButton3';
SetPosition(8, 56, 72, 20);
FontDesc := '#Label1';
GroupIndex := 0;
Hint := '';
TabOrder := 2;
Text := '1/4 size';
Tag:=3;
OnChange := @rbChanged;
end;
RadioButton4 := TfpgRadioButton.Create(Panel1);
with RadioButton4 do
begin
Name := 'RadioButton4';
SetPosition(8, 80, 72, 20);
FontDesc := '#Label1';
GroupIndex := 0;
Hint := '';
TabOrder := 3;
Text := '1/8 size';
Tag:=4;
OnChange := @rbChanged;
end;
Button1 := TfpgButton.Create(self);
with Button1 do
begin
Name := 'Button1';
SetPosition(216, 260, 80, 24);
Text := 'Open';
FontDesc := '#Label1';
Hint := '';
ImageName := '';
TabOrder := 2;
OnClick:=@Btn1Click;
end;
Button2 := TfpgButton.Create(self);
with Button2 do
begin
Name := 'Button2';
SetPosition(216, 304, 80, 24);
Text := 'Close';
FontDesc := '#Label1';
Hint := '';
ImageName := '';
TabOrder := 3;
OnClick:=@Btn2Click;
end;
{@VFD_BODY_END: frmMain}
{%endregion}
end;
procedure TfrmMain.LoadImage;
begin
WindowTitle := FImageName;
FImage := LoadImage_JPG(FImageName, SizeSelect);
RePaint;
end;
constructor TfrmMain.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
OnPaint := @FormPaint;
SizeSelect := 1; // full size by default
end;
destructor TfrmMain.Destroy;
begin
FImage.Free;
inherited Destroy;
end;
procedure TfrmMain.Btn1Click(Sender: TObject);
var
dlg: TfpgFileDialog;
begin
dlg := TfpgFileDialog.Create(nil);
try
dlg.Filter := 'JPEG Image (*.jpg)|*.jpg';
if dlg.RunOpenFile then
begin
FImageName:= dlg.FileName;
end;
finally
dlg.Free;
end;
LoadImage;
end;
procedure TfrmMain.Btn2Click(Sender: TObject);
begin
Close;
end;
procedure TfrmMain.FormPaint(Sender: TObject);
begin
Canvas.DrawImage(0, 0, FImage);
end;
procedure TfrmMain.rbChanged(Sender: TObject);
begin
if Sender is TfpgRadioButton then
SizeSelect := TfpgRadioButton(Sender).Tag;
LoadImage;
end;
end.
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