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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for June 25th, 2019

Cool new Twitter account that warns about a free book when it appears: Packt Free Learning (@packtfreebook) | Twitter

Posted by jpluimers on 2019/06/25

Packt free books

Usually one free book each day, with some pauses when Packt Publishing runs other specials [WayBack] Packt Free Learning (@packtfreebook) | Twitter.

This account started on 20190621. Hopefully it lasts for a while, as it is a very easy reminder on when a new free book becomes available.

Maybe they will notify of other free specials as well; time will tell.

Hopefully, the WordPress Twitter binding will show the most recent one below by Packt – Wikipedia.

EU versus USA Packt prices

Note that since a month or two, the Packt site asks me on a daily base to switch to their European site instead of to their USA site.

Avoid switching, as that incurs a high currency conversion cost. For example:

So that is a EUR/USD conversion factor of between 0.9 and 0.86 right (eBook 9/10 and paper+eBook 38.99/44.99).

Actually that’s not true: at the time of writing, the conversion is 0.78 which leaves a ~15% profit for just eBooks (0.9/0.78-1) and ~10% (0.86/0.78) margin for the Packt conversion. A tad high for my likings.

[] 10 usd in eur – Google Search

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Posted in Development, Software Development | Leave a Comment »

WouterVanNifterick/C-To-Delphi: C To Delphi converter

Posted by jpluimers on 2019/06/25

For my link archive: [WayBack] WouterVanNifterick/C-To-Delphi: C To Delphi converter

Via: [WayBack] Does anyone know of a C/C++ to Delphi converter? – Michael Riley – Google+


Posted in C, Delphi, Development, Software Development | 2 Comments »

missing TPopupMenu feature: checking for visibility

Posted by jpluimers on 2019/06/25

a method to detect when the menu was closed without a selection (i.e. none of the menuitem OnClick handlers fired). Add the unit below to your project and the form the popup menu is on will receive the custom messages defined in the unit when the menu appears or closes.

The solution by Peter Below in ExPopupList works from D5 on:  [Archive.ismissing TPopupMenu features? – Google Groups.

Now you can hook the [WayBackTControl.OnContextPopup Event for a [WayBackTPopupMenu activation, and the custom Windows messages CM_MENUCLOSED, CM_ENTERMENULOOP and CM_EXITMENULOOP to monitor the state of the popup menu.



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Posted in Delphi, Development, Software Development | Leave a Comment »

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