Creating Compound Components :: Chapter 9: Writing Delphi.
Creating Custom Delphi Components - Inside and Out This tutorial will explain component writing to you, which should result in more code reuse. It will go over properties, events, and methods, and will also explain how to install components.
The code of a design-only package's components is usually statically linked into the executable file, using the code of the corresponding Delphi Compiled Unit (DCU) files. Keep in mind, however, that it is also technically possible to use a design-only package as a run-time package.
With past versions of Delphi, the component had to define a new property, Active, wrapping the Enabled property of the Timer. A wrapper property means that the get and set methods of this property read and write the value of the wrapped property, which belongs to an internal component (a wrapper property generally has no local data). In this specific case, the code looks like this.
Customizing the DBGrid Component. In addition to writing new, custom, data-aware components, Delphi programmers commonly customize the DBGrid control. The goal for the next component is to enhance the DBGrid with the same kind of custom output I used for the RecordView component, directly displaying graphic and memo fields.
The six basic steps to writing your Delphi component are as follows: 1. Deciding on an ancestor class. 2. Creating the Component Unit. 3. Adding properties, methods, and events to your new component. 4. Testing your component. 5. Registering your component with the Delphi environment. 6. Creating a help file for your component.
A Delphi component passes component messages to other components to indicate any change in its state that might affect those components. Most of these messages begin as Windows messages, but some of them are more complex, higher-level translations and not simple remappings.
Historical Documents: Delphi 1 launch demos source code, launch script, and marketing video By: John Kaster. Abstract: Anders Hejlsberg provided the original launch script and projects used in the Delphi 1 launch on February 14, 1995.
Description: Use structural, behavioral, and concurrent patterns in Delphi to skillfully develop applications Key Features Delve into the core patterns and components of Delphi to enhance your application's design Learn how to select the right patterns to improve your program's efficiency and productivity Discover how parallel programming and memory management can optimize your code Book.
In Delphi I could study the built-in in components, or follow the tutorials and write my own if needs be, or figure out how to achieve my aims using the existing functionality. First, a quick review Delphi is a commercial product for developing software ( Embarcadero-1 ), ( Wikipedia-1 ), with a proprietary IDE and version of Object Pascal ( Wikipedia-2 ) that integrates tightly with the.
An Overview of the IDE When you work with a visual development environment, your time is spent in two different portions of the application: visual designers and the code editor. Designers let you work with components at the visual level (such as when you place a button on a form) or at a non-visual level (such as when you place a DataSet component on a data module).
Writing a Copernic Desktop Search Plug-in Using Delphi 2006 Overview. Copernic Desktop Search is arguably one of the best desktop search tools available. One of the features that makes it great is the ability to extend it using the simple file extractor plug-in API.
According to their website, Lazarus is a Delphi compatible cross-platform IDE for Rapid Application Development. It strives to be free and open source replacement for Delphi. Before writing this review, I have never written a line of Pascal, but after playing around with the IDE, I managed to create a simple todo application.
The RoundRect shape has too much space missing in the corners. I'd like to specify a smaller corner ellipse. Is there any way to make the rounding of the corners more subtle by using the Delphi shape, or do I have to resort to writing to the WinAPI?
