What is a component in Delphi?

What is a component in Delphi?

Building components is an important activity for Delphi programmers. Basically, any time you need the same behavior in two different places in an application, or in two different applications, you can place the shared code in a class—or, even better, in a component.

How do I create a component in Delphi?

Choose Component > New Component. Choose File > New > Other, go to the Delphi Projects > Delphi Files page and double-click Component….The New Component wizard performs the same tasks you would when creating a component manually:

1. Creating a unit.
2. Deriving the component.
3. Registering the component.

How do I create a component at runtime in Delphi?

To simplify the runtime component creation process, you can use GExperts.

1. Create a component (or more components) visually and set its properties.
2. Select one or more components and execute GExperts, Components to Code.
3. Paste the generated code into your application.
4. Remove component(s) from the visual form designer.

What is a tab in Delphi?

The tab control component (TTabControl) creates a set of tabs that look like notebook dividers. For VCL, you can create tabs by editing the Tabs property in the Object Inspector; each string in Tabs represents a tab. The tab control is a single panel with one set of components on it.

What is a GUI Delphi?

A graphical user interface (GUI) application is one that is designed using graphical features such as windows, menus, dialog boxes, and features that make the application easy to use. You can extend the application by calling DLLs, packages, and other support files from the executable.

What is a dynamic component Delphi?

Dynamic Component Creation This is a common practice when building composite components where a visual container creates and owns the subcomponents. The Create constructor is a class method, as opposed to virtually all other methods you’ll encounter in Delphi programming, which are object methods.

How do I set tabs in Delphi?

The tab order is initially set by Delphi, corresponding to the order in which you add components to the form. You can change this by changing the TabOrder property of each component, or by using the Edit Tab Order dialog box.

How do I create a class in Delphi?

Defining New Classes (Delphi)

1. In the IDE, start with a project open and choose File > New > Unit to create a new unit where you can define the new class.
2. Add the uses clause and type section to the interface section.
3. In the type section, write the class declaration.

Which is an example of a Delphi component?

A Delphi component can be used to add functionality to your Delphi application or project, without spending a lot of time writing it yourself. Typical examples of Delphi components are: Delphi PDF, Delphi grid & Delphi chart controls.

What can a VCL be used for in Delphi?

VCL, short for Visual Component Library, is a type of component or control that you can use in Delphi or call from C++ Builder. A Delphi component can be used to add functionality to your Delphi application or project, without spending a lot of time writing it yourself.

Which is HTML component library for Delphi and Lazarus?

HTML Component Library is a cross-patform and 100% native HTML rendering library for Delphi and Lazarus that brings all the power of HTML/CSS into desktop and mobile Delphi applications.

Is the Delphi component library compatible with Android?

Library supports all Delphi versions from ancient Delphi 5 to Delphi 11 Alexandria. For Delphi XE4 – Delphi 11 Alexandria all FMX platforms are supported – Win32/64, OSX, Android, iOS and Linux. Unicode (including Right-to-Left) is supported even for non-unicode Delphi 5 – 2007 using widestrings and TNT Unicode library.