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Thoughts from David Cornelius

Software development tools and techniques explored--mostly Delphi

Widths and Themes

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In the old DOS days, things were simple. You had 25 rows and 80 columns of text. Period. Well, if you knew the right tricks, you could double the rows or columns, but still it was pretty limited. This made programming fairly easy--you knew how much space you had to deal with. With a GUI, or Graphical User Interface, things can get stretched out, you can have larger fonts, and you can have themes on or off. So knowing how much space you have to display stuff isn't quite as cut and dried. But I'm going to look at just one aspect that can be surprising: themes.

DateTimePicker Vista Theme!

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Adding theme support to your application can give your program a whole new look (if you use standard Windows controls) without changing anything else. This works because the controls will actually use a different set of DLLs behind the scene. In Delphi 2007, this is accomplished with a simple checkbox in the project options. (Visit the Delphi Wikia page and search for "Adding Theme Support" for more information.) The DateTimePicker is one of these and I just discovered its new capabilities when themed on Vista or Windows 7.

Starting with Delphi Prism

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I've recently acquired the latest Pascal language compiler from RemObjects, Oxygene. Embarcadero, now the owners of Delphi, decided not to continue development of Delphi for .NET, but instead license this compiler plug-in for Visual Studio from RemObjects. So if you get RAD Studio 2009 from Embarcedero, which includes Delphi 2009 for Win32, you also get a special single-language version of Microsoft Visual Studio with the Pascal compiler from RemObjects.

Delphi History

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Delphi is one of the greatest development environments every produced for Windows. It has an easy to learn, yet strict language that leads to less confusion than C++ and better coding practices than Visual BASIC. Unfortunately, it has been marketed by a company that has made so many changes in direction and name that people have laughed it off. One more change has happened recently, here is the story, which actually starts over 25 years ago, before Windows.

Turbo Pascal

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Microsoft likes to take credit for "innovations" in software. But usually, they just steal or purchase other companies' ideas. For example, Borland pioneered Integrated Development Environments back when most people had 5-1/4" floppy disks and CPU Mhz was rated in "K" units. Turbo Pascal was a terrific way to quickly create applications, and allowed the programmer to edit, compile, and run their programs without creating a bunch of batch files and launching them just before going out for lunch. Alas, Borland has lost most of its pioneering geniuses to the Redmond, Washington monolith.

PicViewer

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PicViewer is a Windows 32-bit program that lets you scan through a bunch of graphic files (.JPG, .BMP, .ICO, etc.). It has a full screen mode in which the background is black and the cursor is hidden. In this mode, the spacebar or arrow keys step through each of the graphic files in the directory thus making it easy to give a slide show. A movie mode has been added to provide automated naviation. The pictures can be scaled to fit the window or shown in full-size mode with scrollbars if needed. Command-line parameters can start in a given directory, initiate movie mode, etc.

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