Comments for The Art of Delphi Programming

Comment on Windows 7 Previews – the Delphi Way by Uwe Raabe

Uwe Raabe — Mon, 13 Jun 2011 15:09:10 +0000

What are you trying to do? What “memo1″?`When do you call SaveToFile?
Currently, I have no idea what you are doing.

Comment on Windows 7 Previews – the Delphi Way by yuda

yuda — Mon, 13 Jun 2011 14:49:18 +0000

i wrote memo1.Lines.SaveToFile under windows xp and under windows 7 its not working,
is it known problem ?
any solutions
thanks very much
yuda

Comment on Windows 7 Previews – the Delphi Way by Juan Martinez

Juan Martinez — Thu, 09 Jun 2011 21:13:43 +0000

Thank you very much Uwe.

I recently upgrade to XE but I haven’t installed it yet. Your work is a motivation to do it soon.

Thanks again

Comment on Windows 7 Previews – the Delphi Way by Uwe Raabe

Uwe Raabe — Wed, 08 Jun 2011 19:57:55 +0000

Sorry, the code is meant for Delphi XE – I didn’t test it for earlier versions. Propsys.pas was introduced in Delphi 2010, though. It contains some interface declarations that can also be found somewhere in MSDN.

Comment on Windows 7 Previews – the Delphi Way by Juan Martinez

Juan Martinez — Wed, 08 Jun 2011 13:40:08 +0000

Wonderful!. Excellent!.

Thanks Uwe.

Where can I found the file “PropSys”?. I use Delphi 2009 Pro.

Thanks in advance

Comment on Windows 7 Previews – the Delphi Way by Uwe Raabe

Uwe Raabe — Sat, 04 Jun 2011 08:55:42 +0000

Interesting question – I might have a look into this…

Comment on Windows 7 Previews – the Delphi Way by Greg

Greg — Fri, 03 Jun 2011 22:35:11 +0000

I’ll probably use this for one of my projects I’ve been wanting to create a Preview Handler for. Your work is much appreciated as it looks like it will now be an easy task for me. Thank you.

Do you know of a similarly simple way to display a preview of a file/stream within a Delphi application using Preview Handlers? For example, if I want to display a PDF using its’ Preview Handler or my own .ABC extension using my custom Preview Handler?

Comment on Windows 7 Previews – the Delphi Way by Rodrigo

Rodrigo — Thu, 02 Jun 2011 15:23:47 +0000

Great Code Uwe, I have experience written previews handlers in C#, Delphi prism and Delphi but my way to generate the preview handler (I use a lot of COM calls and interfaces) differs from you way (the delphi way), your code is much more simple than my code, you are handling very tricky stuff in a simpler way. You are a very smart guy congrats for you work.

See You.

Comment on Windows 7 Previews – the Delphi Way by Uwe Raabe

Uwe Raabe — Thu, 02 Jun 2011 08:59:53 +0000

You may concentrate your searches on TComPreviewHandler.SetFocus trying to skip the current behaviour. If that solves the problem we might find a better implementation.

While direct debugging is somewhat limited, I had a good experience with CodeSite.

Comment on Windows 7 Previews – the Delphi Way by Andreas Stenius

Andreas Stenius — Thu, 02 Jun 2011 08:47:42 +0000

Excellent post!

It took me less than an hour to create a preview handler for presenting the data from our custom .DAT files in explorer.

A minor note though. The Memo control I’m using doesn’t seem to be able to hold on to the focus. All clicks causes the explorer to flash and regain focus.
Haven’t looked into it closer, perhaps I will if it gets too annoying.