- #Delphi word plugin for mac code#
- #Delphi word plugin for mac Pc#
- #Delphi word plugin for mac windows#
I found out (the hard way) that if I need to include all my plugins with every release, there is no point in having plugins at all. This includes Delphi updates which can break something.
If you use BPL system, then you need to match BPL version with EXE version. There are some ready-made solutions, but as far as I know they usually use BPLs, with their limited usefulness.Īt first I went for BPL and DLL base plugins. Google for "Delphi plugin framework", too. And it's not a one-nighter job, while BPLs certainly are. This method will restrict plugins to the set of VCL controls your application already uses or has registered, though. (XML is a convenient way to express the UI, since you get the concept of parenting / nesting for free.) The UI description syntax can include callbacks to the DLL triggered when the contents or state of the control changes. To get around this, I have experimented with a different approach: keep using DLLs, and develop a syntax for the plugin to describe the UI it needs, then create the UI yourself in the host app. In my opinion this makes packages completely impractical, since it's hard to expect that all the potential plugin writers around the world will be using the same version of Delphi you are. The catch is, all BPLs must be compiled with the same exact version and build of Delphi that your main application is.
With BPLs, you can access and instantiate classes offered by a plugin as if they were declared in your host application. The Borland/CodeGear-sanctioned way is to use packages (BPLs). In general, DLLs cannot be used to do this.
Now, back to my initial question: things get much more complicated if you need the plugins to interact with your user interface, e.g. It seems to me that the barrier to entry, from the point of view of potential plugin writers, is lower if you use scripting than if you choose DLLs. However, every user will need to have a Python distribution installed. Given the popularity of Python, this may be a viable solution if you want to attract developers to your project.
#Delphi word plugin for mac code#
My favorite scripting solution at the moment is Python for Delphi (P4D, also free) from It can interface beautifully with your classes via RTTI, and allows you to execute Python code in your Delphi app, as well as use Delphi classes in Python scripts. See for example RemObjects Pascal Script (free) at. Some of these libraries support only Pascal as the scripting language, others will let you use Basic (perhaps better for beginner users) or other languages. There are several very capable 3rd-party scripting engines, both commercial and free, and most of them allow you to exchange Delphi objects with the script. Google for using DLLs in Delphi, and you'll find plenty more tips.Īnother way that hasn't been mentioned yet is to enable scripting in your application itself. This will appear to work in some cases, but is unsafe in general, because even if the DLL was compiled in Delphi, it may have been a different version of the compiler, with a slightly different idea of what TStream is). Do not as a rule pass Delphi classes such as TStream to a DLL. (So for example, use PChars, not strings. THat way you can be sure that the plugin DLLs will understand your data types, no matter what language/compiler they were created in.
#Delphi word plugin for mac windows#
Certain caveats apply - in general you should be interfacing with a dll using only the data types that are used in Windows API. Others have already mentioned DLLs, which is the first way to go. The latter is much easier and opens up two possibilities. Installation is fast, simple, and free.The first question I would ask is, do you need the plugins to access the UI of your host application, or add any UI elements of their own? Or will the plugins be limited to querying and/or supplying data to your host app?
#Delphi word plugin for mac Pc#
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