John Elder of Codemy recently started a project where we will build an interactive text editor. The tutorial was divided into multiple parts where John will teach us how to build this simple Python GUI app from scratch. The previous videos taught us to build the widget and add some common functionalities to it including the ability to open and save files to a directory.
This time, we will learn…
The ComponentIndex property or DelphiVCL.Application.ComponentIndex from DelphiVCL is used to indicate the position of the component in its owner’s Components property array.
Use ComponentIndex when iterating through the Components list of the component’s…
Use the Dispatch method or DelphiVCL.Application.Dispatch from the DelphiVCL library to call message-handling methods for the object, based on the contents of the Message parameter.
Call Dispatch to automatically pass messages to the appropriate message…
Tkinter is a beginner-friendly GUI toolkit for Python and can be used to create cross platform apps. It features a widget system that allows you to easily add elements to your application using a simple line of commands. In this video, John Elder of Codemy will teach us how to create a simple text editor using the Tkinter in Python. Although this project sounds complicated, it is surprisingly easy…
Whenever object-oriented programming is done in Python, we mostly come across the __init__ method. This article explains the main concept of __init__ method in Python when used for Windows app development of graphical user interfaces (GUIs).
“__init__” is a…
How To Change Behavior Of Components For Windows Development
April 13, 2022
The ComponentStyle property or DelphiVCL.Application.ComponentStyle is used to govern the behavior of the component when you are carrying out Windows development.
ComponentStyle governs how the component interacts with the streaming system and the Object Inspector.
The DoApplicationIdle method or DelphiVCL.Application.DoApplicationIdle is used to process messages in the Message queue for certain events as part of your Windows development.
The DoApplicationIdle method forces a call to the protected method TApplication.Idle. Idle triggers the event OnIdle, processes the events OnMouseEnter and OnMouseLeave, and updates the hints.
Let’s browse all the…
After the comprehensive CRM Database project, John Elder recently started a new one, a text editor using the Tkinter module in Python. Creating a text editor using the Tkinter is surprisingly easy and you can add a seemingly endless number of interactive functionalities to…
The DelphiVCL.ControlBar manages the layout of toolbar components as part of a low code application platform. With components like the controlbar in the DelphiVCL the amount of code you actually have to write is greatly reduced and often avoided altogether.
Use…
TFillStyle in Delphi’s VCL Windows UI toolkit indicates the type of color change that defines the boundary of a possibly non-rectangular region on a canvas.
TFillStyle values determine what type of color changes define the boundaries of a (possibly) non-rectangular region of a canvas, as indicated in the following table:
Value
Meaning
fsSurface
The region is defined…
