Solved

Creating Image Viewer Component (Again!)

Posted on 2007-11-26
2
2,155 Views
Last Modified: 2013-11-23
Hi, I am making an Image viewer component in Delphi 7 that displays only bmp's. I have placed all of my sub components in a TPanel,  including

an Image Box
a Load File Button
An exit (close) button
A label that displays the file size

I have managed to code where I want  my buttons , labels and image box to be,  but what I want to know is how I add events to the buttons,  what code do I add to make the exit button close and to open a bmp?

I first made an application with all of the functionality working, just need to know how to transfer that to the compnent code?

Any ideas would be gratefully appreciated.

I have already asked this question before and I got a great solution from  expert dinilud (his code is below) but I forgot to ask him how I could retrieve & show another 2  image  properies in a label

1. File size in bytes or MB
2. Date file was created.

Cheers


unit ImageViewer;
 
interface
 
uses
  SysUtils, Classes, Controls, ExtCtrls, StdCtrls,ExtDlgs,Forms,Graphics;
 
type
  TImageViewer = class(TPanel)
  private
    { Private declarations }
    FLoadBmpBtn: TButton;
    FExitBtn: TButton;
    FInfoBtn: TButton;
    FImage1: TImage;
    FCreatedLabel: TLabel;
    FSizeLabel: TLabel;
    FSizeLabelCaption: TLabel;
    procedure FExitBtnClick(Sender: TObject);
    procedure FLoadBmpBtnClick(Sender: TObject);
    function GetPicture:TPicture;
    procedure SetPicture(Value:TPicture);
  protected
    { Protected declarations }
 
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    { Public declarations }
  published
    { Published declarations }
    property Picture:TPicture read GetPicture write SetPicture;
  end;
 
procedure Register;
 
implementation
 
procedure Register;
begin
  RegisterComponents('Samples', [TImageViewer]);
end;
 
constructor TImageViewer.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Caption:=' ';
  SetBounds(Left,Top,260,345);
  FLoadBmpBtn:=TButton.Create(Self);
  FLoadBmpBtn.Parent:=Self;
  FLoadBmpBtn.Caption:='Laod';
  FLoadBmpBtn.SetBounds(85,305,80,25);
  FLoadBmpBtn.Anchors:=[akBottom,akRight];
  FLoadBmpBtn.OnClick:=FLoadBmpBtnClick;
  FExitBtn:= TButton.Create(Self);
  FExitBtn.Parent:=Self;
  FExitBtn.Caption:='Exit';
  FExitBtn.SetBounds(167,305,80,25);
  FExitBtn.Anchors:=[akBottom,akRight];
  FExitBtn.OnClick:=FExitBtnClick; 
  FInfoBtn:= TButton.Create(Self);
  FInfoBtn.Parent:=Self;
  FInfoBtn.Caption:='Info';
  FInfoBtn.SetBounds(2,305,80,25);
  FInfoBtn.Anchors:=[akBottom,akRight];
  FImage1:=TImage.Create(Self);
  FImage1.Parent:=Self;
  FImage1.SetBounds(8,8,243,243);
  FImage1.Anchors:=[akLeft,akTop,akRight,akBottom];
  FImage1.Stretch:=True;
 
  FSizeLabelCaption:= TLabel.Create(Self);
  FSizeLabelCaption.Parent:=Self;
  FSizeLabelCaption.SetBounds(8,256,32,13);
  FSizeLabelCaption.Caption:='Size: ';
  FSizeLabelCaption.Anchors:=[akBottom,akLeft];
  FSizeLabel:= TLabel.Create(Self);
  FSizeLabel.Parent:=Self;
  FSizeLabel.SetBounds(FSizeLabelCaption.Left+FSizeLabelCaption.Width,256,32,13);
  FSizeLabel.Caption:='0 X 0';
  FSizeLabel.Anchors:=[akBottom,akLeft];
end;
 
destructor TImageViewer.Destroy;
begin
  FSizeLabelCaption.Free;
  FSizeLabel.Free;
  FImage1.Free;
  FInfoBtn.Free;
  FLoadBmpBtn.Free;
  FExitBtn.Free;
  inherited;
end;
 
procedure TImageViewer.FExitBtnClick(Sender: TObject);
var c:TComponent;
begin
  c:=Self;
  While TWinControl(C).Parent<>nil do
  begin
     if TWinControl(C).Parent is TCustomForm then
     begin
        TCustomForm(TWinControl(C).Parent).Close;
        Break;
     end;
     c:=TWinControl(C).Parent;
  end;
{  if TWinControl(C).Parent is TCustomForm then
      TCustomForm(TWinControl(C).Parent).Close;}
end;
 
procedure TImageViewer.FLoadBmpBtnClick(Sender: TObject);
var f:TOpenPictureDialog;
begin
   f:=TOpenPictureDialog.Create(Self);
   try
     if f.Execute then
     begin
       FImage1.Picture.LoadFromFile(f.FileName);
       FSizeLabel.Caption:=IntToStr(FImage1.Picture.Width)+' X '+
                               IntToStr(FImage1.Picture.Height);
     end;
 
   finally
     f.Free;
   end;
end;
 
function TImageViewer.GetPicture:TPicture;
begin
  Result:=FImage1.Picture;
end;
 
procedure TImageViewer.SetPicture(Value:TPicture);
begin
   FImage1.Picture.Assign(Value);
   FSizeLabel.Caption:=IntToStr(FImage1.Picture.Width)+' X '+
                               IntToStr(FImage1.Picture.Height);
end;
 
end.

Open in new window

0
Comment
Question by:gedge73
2 Comments
 

Author Comment

by:gedge73
ID: 20353839
Anybody?
0
 
LVL 1

Accepted Solution

by:
carcotasu earned 500 total points
ID: 20356389
try to replace this procedure:



procedure TImageViewer.FLoadBmpBtnClick(Sender: TObject);
var f:TOpenPictureDialog;
    fs: file of Byte;
    fSize, fDate :string ;
begin
   f:=TOpenPictureDialog.Create(Self);
   try
     if f.Execute then
     begin
       FImage1.Picture.LoadFromFile(f.FileName);
       // size in bytes
       try
          AssignFile(fs, F.FileName);
          Reset(fs);
          fSize:=IntToStr(FileSize(fs)) ;
          CloseFile(fs);
       except
         fSize:='Unknown' ;
       end ;
       // end size
       // date file
       try
          fDate:=DateTimeToStr(FileDateToDateTime(FileAge(F.FileName)));
       except
          fDate:='Unknown';
       end ;
       // end date file
       FSizeLabel.Caption:=IntToStr(FImage1.Picture.Width)+' X '+
                               IntToStr(FImage1.Picture.Height)+' Size: '+
                               fSize+' Date File: '+fDate ;
     end;
 
   finally
     f.Free;
   end;
end;

Open in new window

0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question