Thus, when you create a Delphi style class, you are permitted to use multiple inheritance, but only if all of the base classes except the one that is a RTL or Delphi style class have no data members and only pure virtual methods. In C++Builder, the compiler recognizes classes that have only pure virtual methods and no data members as corresponding to Delphi interfaces. This allows polymorphic behavior for classes that share the same interface, even if they do not have a common ancestor. Delphi code can assign a class instance to variables of any of those interface types, just as it can assign the class instance to a variable of any ancestor class type. While an Delphi class can have only a single parent class, it can support any number of interfaces. That is, an interface is like a class where all the methods are pure virtual and there are no data members. An Delphi interface acts like a class with no implementation. There is no C++ construct that maps directly to the Delphi concept of interface. Using Interfaces Instead of Multiple Inheritanceįor many of the situations where you would use multiple inheritance in C++, Delphi code makes use of interfaces instead. 5 Interfaced classes and lifetime management.4 Creating classes that support IUnknown.1 Using Interfaces Instead of Multiple Inheritance.I can't tell you how to call this function in Delphi, but the WPF demo code may give you some ideas. From your code you need to navigate to ReportLoader.html file and run LoadEmbeddedObject JavaScript function from ReportLoader.js, passing to it the embedUrl of your report, your access token and the Id of the report to be embedded. The second is JavaScript code, which you need to run to load the report in the third one. Basically you need to copy powerbi.js, ReportLoader.js and ReportLoader.html files from the demo to your project. This demo shows you how to embed the report in a WPF application. When you acquired an access token, get the report's embedUrl using Get Report In Group API.Įmbedding of Power BI reports is basically loading them in a in a web page. You may take a look at this question to see how you can do this using raw web requests in Delphi: How to connect a Delphi desktop app to a third-party Dynamics 365 app using OAuth 2.0? Normally, this access token is acquired using ADAL, but I have doubts you will find one for Delphi. It will be used in further calls to Power BI REST API. To embed a report, you must authenticate yourself and acquire an access token.
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January 2023
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