According to the MediaInfo documentation which is located at http://mediainfo.sourceforge.net/en/Support/SDK/Doxygen/class_media_info_lib_1_1_media_info_list.html, the MediaInfoList class is used to gather information about multiple files in one shot.
The problem I have is the MediaInfoDLL.pas file that comes with the download package does not contain any information I need to access this class and I cannot find any examples online that show how to use this class from within Delphi.
If anyone has any references or examples on how I am supposed to access this class then please do share.
That is Visual C++ class, it is absolutely different from Delphi classes.
You may try to compile the whole MediaInfo using C++ Builder instead.
Or make COM class over that class using Visual C++.
Or better not use classes at all. Most simple. And most practical.
Make your own class wrapping non-class API
Related
I would like to write a syntax highlighting editor extension for VS 2019 in C++ (nothing else), are there any samples to get me started?
I can only find one example extension for VS 2019 written in C++ and it consists of a subclass with no explanations of how to do anything AFAI can see.
I believe I need a language editor extension, but am not 100%
The language it needs to highlight is similar to assembler.
If this was VS6, I might have just used the custom keyword colouriser.
I would like to write a syntax highlighting editor extension for VS
2019 in C++ (nothing else), are there any samples to get me started?
In current VS IDE, Microsoft does not advocate writing extensions in c++.
As Microsoft recommends, current extensions are more likely to use c# rather than c++.
Although some VS SDK APIs are probably written in c++, but the interfaces are still called using c#.
However, there is only one c++ project template called vspakcage
But this project provides various background services for VS IDE . It will only be loaded when needed. So for you to add the syntax highlighting feature permanently, this project is afraid of lacking.
Besides, there is no official documentation to guide the writing of the c++ project.
Suggestion
You can try to write such extension in c#, and you can refer to this official document and this.
In addition, if you still want your feature, I suggest you could suggest a feature on our User Voice Forum.(click suggest a feature). Then you can share the link with us here and anyone who is interested in this feature will vote for you so that it will get Microsoft's attention.
I'm working on an ActiveX where the same code base should be used to two different ActiveXs, meaning, I have the single solution which is built from several DLLs.
When I build the solution for creating the CAB for ActiveX A, I change the DLLs class IDs to specific ones and when I built it for creating the CAB for the second ActiveX, I changed the class IDs to something else.
I need both ActiveXs to be able to run on the same machine.
Basically, it works fine except for that in certain scenarios where I run different versions of the ActiveXs (ActiveX A is from older code version than ActiveX B) there is un-desired behavior.
It looks like that ActiveX loads some DLLs from ActiveX B (which is from different code version).
Sorry for the long description but last important information, since both ActiveXs come from the same code, I have the same class name which is exposed to the javascript which calls the ActiveX.
In the registry there is total separation in all keys except for the following (NetworkInterface is the exposed class):
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MyActiveX.NetworkInterface\CLSID]
#="{31ED2205-F6AE-4133-AD30-60CA2783ADA6}"
When installing ActiveX I see this entry with the right class ID but when installing the second ActiveX the key is overridden by the second ActiveX.
Is it possible to achieve what I'm trying to achieve?
Is there any way to have the same class registered with different class IDs?
Thanks.
#Lior, You answered your question yourself in this phrase: "to have the same class registered with different class IDs". In fact, we are talking about ProgID's, or programmatic identifiers - MyActiveX.NetworkInterface in your case.
There is just one dedicated registry hive for ProgID's - HKEY_LOCAL_MACHINE\SOFTWARE\Classes\, and if you use a ProgID in your client code to instantiate a component, you can do it only for one ActiveX component. When you create an instance using a ProgID, the corresponding CLSID is determined using that registry hive, and the executable DLL/OCX/EXE which implements that class is used. For the latter case, the corresponding registry hive looks like this:
HKEY_CLASSES_ROOT\Wow6432Node\Clsid{6935DB93-21E8-4ccc-BEB9-9FE3C77A297A}\InProcServer32
The best thing which can be done in this case is to use two different ProgID's for your two ActiveX components. Even if you use the same source code for the main classes, you can use them "as is" in two different projects which are used to compile components with separate ProgID's. It seems, all dev environments (VB6 you're maybe using) allow you to do that.
Some more info about this can be found in this article: http://www.vbaccelerator.com/progid.htm
We had the same issue with our ActiveX components, and our experience tells us that to have different ProgID's is the best choice. Even if you release a next version, change the ProgID. This will allow both versions to coexist in the same OS without any problems, and the developers can upgrade the existing projects step-by-step.
===
As an answer to your question, I have an idea of how you can try to solve your problem if you cannot change ProgID's. As I know, you can activate ActiveX's using directly their CLSID's, and different dev environments use different techniques for that. I do not have your project, but if you use JavaScript, you can try the recipe from this article:
http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/08652e9e-7deb-40a3-8c1a-f9becdcbf56e/
In a nutshell, you do not need to create your ActiveX objects using a call like this:
myobject = new ActiveXObject("SAMPLEACTIVEX.sampleActiveXCtrl.1");
You need to put your two ActiveX controls on the page using the OBJECT tag and call the methods of your objects using their names (id's) on the webpage. If you look at an example of the HTML OBJECT tag, you'll see something like this:
As you can see, you can use the specified ID to access the members of the object you exactly need. Many examples of that are already on SO - here is one of them:
javascript: "Object doesn't support this property or method" when ActiveX object called
Years ago, I wrote a code template that took a few simple parameters (points) and produced a class skeleton. Since some of the method bodies had code in them, I couldn't call InvokeClassCompletion and just placed the implementations with the declarations (user had to move them).
It has occurred to me that I can write a code template script engine to insert these methods in the correct position, but I don't see how I'm supposed to navigate the file. There are declarations for IOTAEditReader and IOTAEditWriter in ToolsAPI.pas, but I'm guessing there is a step missing - certainly I don't need to manually parse the Delphi code just to find the implementation section?
Does anyone have experience with it?
The IDE has plenty of parsers in it, but not one is made available for IDE plugins (ToolsAPI). So you have to write your own parser or use an existing one like http://delphiblog.twodesk.com/using-the-castalia-delphi-parser
You might find that GExperts or CNPack contains almost all the code you need, in one of its editor wizards.
If not, then, those two are the best reference I know for writing IDE plugins. As far as writing parsers, see Andreas' answer.
If you just want better code templates, you could consider buying Castalia, as it has an improved code template feature over the builtin delphi IDE plugin features. Castalia internally uses the Castalia delphi parser mentioned by andreas. It's quite good.
I am seeking to understand someone else's code in Delphi 7 (I suspect that newer version have this built in, but I don't want to spring > $1k for the newest version).
Are their any (preferably FOSS) tools which will help me generate a class hierarchy diagram?
Actually, the class browser in GExperts is ok. Maybe not as good as the accepted answer, but just one of a great collection of tools
You can use ESS-model from SourceForge.
If you Load and .PAS (also .DPR, .CLASS,...) with some classes this program generate a Class Diagram and some Documentation. It's free and you can access to code source.
Regards
AFAIK ModelMaker 6.2 was included with Delphi 7, it's a UML tool. You can import your source code in it and generate class diagrams etc, I really don't remember anymore all of it's features, but I do remember that ModelMaker is awesome tool and it's sure worth a look.
Update: Model Maker (now MMX) is now free for all supported Delphi IDEs
You can take a look at our SynProject tool.
Synopse SynProject is an open source application for code source versioning and automated documentation of Delphi projects.
There is a pascal source parser, which will create all classes hierarchy documentation.
And it's much more than a parser: you can write the whole Specifications/Architecture/Design/Test/Release documents list in an integrated manner.
There are some tutorials, screenshots and resulting documentation sample in the above link.
Peganza's Pascal Analyzer (not FOSS)
Doc-o-matic's documentation generator creates class hierarchies. They have a free express version you can try.
The Blackberry JDE does not include java.util.ArrayList, even though it knows about java.util? What's up with that? Is there an equivalent class for BB? I don't want to use an array, really, because I have an unknown number of objects I'm dealing with. why does the Blackberry JDE leave so much out?
Well they are Java from a language standpoint. It just doesn't support all of the standard edition packages. It falls more inline with the microedition standards, but is way beyond J2ME from a package standpoint. They don't go around saying they're in compliance with J2SE 1.6, but it's still Java.
And of course it has arrays, unless you mean the class, Arrays. But, they have that too. It's located in package net.rim.device.api.util.
Yeah, Blackberry isn't J2SE, but it's not J2ME neither.
Check out:
IntVector
SimpleSortingIntVector
IntStack
ByteVector
UnsortedReadableList
SortedReadableList
I have doubts about impossibility of doing with those classes something you can do with ArrayList.
Great article: BlackBerry API Hidden Gems (Part Two)
You can add it into your package yourself. Get the ArrayList implementation and just add it into your project. You will also need to get the implementation for AbstractCollection, AbstractList, Collection, Comparable, ConcurrentModificationException, Iterator, List and ListIterator.
I have a project that has a java.util package and I have put all of these classes in there and I can now use ArrayList :). You will have to modify the classes slightly to use rim imports rather than standard java imports where necessary, but it can be done if you really want ArrayLists.