DelphiVCL.PaintBox or TPaintBox provides a canvas that applications can use for rendering an image when you develop Windows software.
We can use TPaintBox to add custom images to a form. Unlike TImage, which displays an image that is stored in a bitmap, icon, or metafile, TPaintBox requires an application to draw the image directly on a canvas. Use the OnPaint event handler to draw on the paint…
This Is How TShiftState Works For Windows App Development
February 16, 2022
TShiftState in DelphiVCL indicates the state of the modifier keys – shift/ctrl/alt, the mouse buttons, or touch devices when you are performing Windows app development.
The TShiftState type is used by key-event and mouse-event handlers to determine the state of the…
If you are planning to create an application whether it’s a big project or just a small yet functional app for desktop or mobile, the first thing you must learn, and master, is how to create a smooth and neat Graphical User Interface (GUI). In order for users to…
Python is a high-level and general-purpose programming language that has been widely used by programmers in many different fields. From a recent PyCon, we have learned that the Python programming language has been effectively applied in Agriculture, High Energy Physics, and more. In this video, we will discover how Python is being applied in another field of science. Maria Jose Molina-Contreras…
Do you want to be able to make your Python apps play sounds and music? Whether it’s Linux, macOS or app development on Windows, adding sounds or the ability to play music adds a great new dimension to your programs and lifts them free of being restricted to the beeps…
One of the key user interface paradigms when you develop Windows software is the ability for users to interact with objects on the screen with their mouse. Most often this means being able to click things but over time the concept of being able to drag – and drop…
In this tutorial (which doesn’t just apply to Windows development) you will be learning how to only pad one side of a widget at a time instead of the default two sides. Whenever we pad widgets, we use pady and padx, but by default we put padding on two sides of the widget. Pady places the padding above and below, the padx puts the padding to the left and to the bottom. In this tutorial, you…
DelphiVCL is a powerful framework for creating excellent, modern, graphical user interfaces (GUIs) for your Python programs. DelphiVCL is independent of Delphi and does not require Delphi to be installed. However, you can make use of Delphi’s powerful IDE software and its…
When it comes to Graphical User Interface or GUI Programming in Python, Tkinter is a default toolkit or default library available for users, especially for beginners to build some robust small-scale applications in Python. While there are many other options available but…
We use the Value property to set or specify any actions or parameters in the DelphiVCL library while using the IDE software.
Here is the working example of Value with CanSelect parameter:
def grdTestSelectCell(Sender, Col, Row, CanSelect):
if Col == 2 and Row == 2:
CanSelect.Value = False
In the example above, we set the CanSelect parameter to False to prevent the cell in…
