Question

Delphi: how to load in a DrawGrid (or ImageList) a lot of bmp files contained in a folder

Asked by: jcfaria

Hello,

I need to put inside a DrawGrid (or ImageList) a lot of bmp files contained in a folder? Is it possible? Please, how to do?

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Asked On
2007-10-30 at 10:09:36ID22927575
Tags

delphi

,

drawgrid

Topics

Graphics and Delphi Programming

,

Delphi Components

,

Delphi Programming

Participating Experts
2
Points
250
Comments
7

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Answers

 

by: developmentguruPosted on 2007-10-30 at 12:56:34ID: 20180572

 I would need to know more about what you want to accomplish.  An Image List only holds one size of image so it is not likely a good candidate.  Again, due to the probability that the images are different sizes, a TDrawGrid is probably not the best choice.  Do you want to be able to view the images one at a time?

  If so, I would create your main form with a list box left aligned, a splitter, and a TScrollBox client aligned and a TImage inside the scroll box.  You can put buttons on the form to add or remove from the list box which would simply be a list of file names and locations.  When the user clicks on a particular file in the list you could call the TImage control's Picture.LoadFromFile.  If you set the TImage's AutoSize property to true then it will become the needed size and the scroll bars will be there due to the scroll box.

  If you were wanting something else entirely I would need more details.

Let me know.

 

by: jcfariaPosted on 2007-10-30 at 15:05:54ID: 20181557

Hi,

Thanks for the answer!

In fact, I would like to improve an editor (written with Delphi 7), i.e, to make it more flexible related with LaTex edition.

So, my basic idea is to enable the user add, remove or change images in a specific folder (the images are really of different sizes) and, in run time, the program will read these files and show all images in the user interface.

As soon as the user to choice one image (with mouse or keyboard) it will add the textual description of the image inside of the editor.

For example, if a have the images: 'alpha.bmp' (W=11; H=18), 'epsilon.bmp' (W=6; H=18), 'gama.bmp' (W=10; H=18), 'subiota.bmp' (W=4; H=18), etc, stored in a folder named 'Greeg', I need to load all (run time) and show it in a suitable way, for the user choice what he want to use.

Regards,
JCFaria

 

by: developmentguruPosted on 2007-10-31 at 05:27:38ID: 20184674

--So, my basic idea is to enable the user add, remove or change images in a specific folder (the images -
--are really of different sizes) and, in run time, the program will read these files and show all images in
--the user interface.

  Adding and removing images is easy enough (copy the file or delete it).  How do you want the user to be able to change the file?

--As soon as the user to choice one image (with mouse or keyboard) it will add the textual description
--of the image inside of the editor.

  Can you give me an example of the "textual description"?  If you want file size, width, and height to display in the user interface then that is easy.  If you want this editor to add comments to the picture... that is something else entirely as you would need to have a separate store of comments to be tied to the BMPs since a BMP (as I understand it) has no area for storing comments internally.

--For example, if a have the images: 'alpha.bmp' (W=11; H=18), 'epsilon.bmp' (W=6; H=18), 'gama.bmp'
--(W=10; H=18), 'subiota.bmp' (W=4; H=18), etc, stored in a folder named 'Greeg', I need to load all (run
--time) and show it in a suitable way, for the user choice what he want to use.

  Are you limited to a certain size of bitmap?  I noticed all of them you mentioned are small.  If your user interface needs to be able to accomodate any size bitmap (versus just small ones) then it makes a huge difference in what you can do with the user interface design.  If you need to accomodate any size I would stick with the design I mentioned earlier (showing one at a time when it is selected).

If you provide enough information I will try to give you a start, let me know.

 

by: JohnjcesPosted on 2007-10-31 at 07:34:51ID: 20185809

JCFaria

Please look at the screen shot, at the top of the page, of a program I wrote at:

http://www.jcitssystems.com/EPhotoView.htm

Is that "something" like the display you are after. Thumbnails, then when you click a larger version appears whereby you can edit the filename, image properties etc?

IF so, let me know and I can provide you with some code and the location of components used.

John

 

by: jcfariaPosted on 2007-11-25 at 18:57:41ID: 20348006

Dear John,

First, many thanks for the tip about your program!

Yes... I just download your application and it is a lot near what I'm needing. But, will be necessary some adaptations.

Basically I'm needing:
1- To load all images (gif, bmp, etc) from folders that have (a new and functional classification) of the latex symbols (see 01. greek.zip file that I sent for your email);

2- To dispose it in a suitable way for the user;

3- Enable the user to choice one file (image) each time;

4- To put in the editor the name of the file: for example if the file is named '001. alpha.gif', in the editor will be add '\alpha';

Could you help me with some code and components?

The software I've been developing is an open source Gui/Editor named Tinn-R: http://sourceforge.net/projects/tinn-r

and I've been improvement the LaTeX support to the users.

See the picture (To John.01.png that I sent for your email): I wonder it will gives for you a clear notion of what I'm needing.

The images will be loaded as soon as the user to choice a TTabSheet component and, when the user to change the active TTabSheet, the content of the old (now not visible) will be cleared (to avoid memory
consumption): see (To John.02.png that I sent for your email).

Regards,
--
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\
Jose Claudio Faria
Estatistica - prof. Titular
UESC/DCET/Brasil
joseclaudio.faria@gmail.com
joseclaudio.faria@terra.com.br
///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\

 

by: JohnjcesPosted on 2007-11-25 at 19:25:38ID: 20348082

Jose,

To start, I use the JEDI code library available from SourceForge and in particular the TJvImagesViewer companent. That comp is much better and more stable than was the TJvThumbView. I do know that some of the problems with the ThumbView component were fixed after I brought several issues to their attention.

http://sourceforge.net/projects/jvcl/
http://homepages.codegear.com/jedi/jvcl/

I am still not certain what you are needing, but with the JvImagesViewer you can do a lot with the images, whether gif or other wise using GraphicEx library;

http://www.soft-gems.net/index.php?option=com_content&task=view&id=13&Itemid=33

I am not certain what code you might need, but with the ImagesViewer you can allow users to select one image and then, when selected, you can do "something" with it via the events of the component.[

I hope this get you going with enough information to start.

John

 

by: jcfariaPosted on 2007-11-26 at 06:52:13ID: 31408466

John,

Great!

I just made a download of JVCL and with one (between a lot) of examples, was possible to find a nice solution for my problem.

With JVCL will be possible to make all I'm needing: many thanks!

Best,
JCFaria

20120131-EE-VQP-002

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