DelphiDelphiVCLPythonPython GUIWindows

What Is A DelphiVCL.Timer In The DelphiVCL Windows UI Toolkit

As a part of the DelphiVCL Windows UI Toolkit the DelphiVCL.Timer or TTimer is used to encapsulate the Windows API timer functions. TTimer is used to simplify calling the Windows API timer functions SetTimer and KillTimer, and to simplify processing the WM_TIMER messages. Use one timer component for each timer in the application. The execution of the timer occurs through its OnTimer event.
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DelphiDelphiVCLPythonPython GUIWindows

How To Use The Action Parameter In DelphiVCL Windows Development

The Action parameter in DelphiVCL is used to specify the action associated with the control when carrying out Windows development. Action is the action object that is associated with the control. Actions allow an application to centralize the response to user commands. When control is associated with an action, the action determines the appropriate properties and events of the control (such as…
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DelphiDelphiVCLPythonPython GUIWindows

What Is A DelphiVCL.PaintBox And How Does It Work?

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…
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DelphiDelphiVCLPythonPython GUIWindows

How To Use The Value Property For Actions and Parameters

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…
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