- 1 year ago
How to get HLS Values from TColorDialog before close
In Delphi, you can use the TColorDialog
component to select a color from the system color picker dialog. However, the TColorDialog
does not provide direct access to the HLS (Hue, Lightness, Saturation) values of the selected color. To retrieve the HLS values from the selected color before the dialog is closed, you can use the following approach:
Add the
Graphics
unit to your form'suses
clause to access theGraphics
module.Declare a variable to store the HLS values:
delphivar
HLSValues: THLSColor;
In the event handler for the button or menu item that triggers the color dialog, write the following code:
delphivar
ColorDialog: TColorDialog;
begin
ColorDialog := TColorDialog.Create(nil);
try
// Set options or customizations for the color dialog if needed
if ColorDialog.Execute then
begin
// Retrieve the selected color
HLSValues := RGBToHLS(ColorToRGB(ColorDialog.Color));
// Use the HLS values as needed
// HLSValues.Hue, HLSValues.Lightness, HLSValues.Saturation
end;
finally
ColorDialog.Free;
end;
end;
In the above code,
ColorDialog
is created and executed. If the user selects a color and clicks the OK button, theRGBToHLS
function is used to convert the RGB value of the selected color to HLS values. You can then access the HLS values usingHLSValues.Hue
,HLSValues.Lightness
, andHLSValues.Saturation
.Note:
RGBToHLS
is a function provided by theGraphics
unit in Delphi. Make sure you have theGraphics
unit included in your project.
With this approach, you can retrieve the HLS values from the selected color before the TColorDialog
is closed and use them as needed in your application.