question with QColor

[Devora]

Hi, is there any kind soul that would explaine what the below source means. thanks

if (nodeData.fadeNumber>255 ||nodeData.fadeNumber<0)
			{
				nodeData.fadeNumber=255;
			}
			if (nodeData.re<100)
			{
				nodeColorDark = QColor(0xD0, 0x80, 0x00,(nodeData.fadeNumber));	
				nodeColor =QColor(0xff, 0xff, 0x00,(nodeData.fadeNumber));
			}
			else
			{
				nodeColor = QColor(0x00, 0xf0, 0xff,(nodeData.fadeNumber));
				nodeColorDark =QColor(0x00, 0x00, 0xff,(nodeData.fadeNumber));
			}
            break;
        default :

if (nodeData.fadeNumber>255 ||nodeData.fadeNumber<0)
			{
				nodeData.fadeNumber=255;
			}
			if (nodeData.re<100)
			{
				nodeColorDark = QColor(0xD0, 0x80, 0x00,(nodeData.fadeNumber));	
				nodeColor =QColor(0xff, 0xff, 0x00,(nodeData.fadeNumber));
			}
			else
			{
				nodeColor = QColor(0x00, 0xf0, 0xff,(nodeData.fadeNumber));
				nodeColorDark =QColor(0x00, 0x00, 0xff,(nodeData.fadeNumber));
			}
            break;
        default :

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[nish]

fire up qt assistant and go to qcolor

QColor::QColor ( int r, int g, int b, int a = 255 )
Constructs a color with the RGB value r, g, b, and the alpha-channel (transparency) value of a.
The color is left invalid if any of the arguments are invalid.
See also setRgba() and isValid().

[Lykurg]

if (nodeData.fadeNumber>255 ||nodeData.fadeNumber<0)
			{
				nodeData.fadeNumber=255;
			}

if (nodeData.fadeNumber>255 ||nodeData.fadeNumber<0)
			{
				nodeData.fadeNumber=255;
			}

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This checks if the value of nodeData.fadeNumber is between 0 and 255.

if (nodeData.re<100)
			{
				nodeColorDark = QColor(0xD0, 0x80, 0x00,(nodeData.fadeNumber));	
				nodeColor =QColor(0xff, 0xff, 0x00,(nodeData.fadeNumber));
			}
			else
			{
				nodeColor = QColor(0x00, 0xf0, 0xff,(nodeData.fadeNumber));
				nodeColorDark =QColor(0x00, 0x00, 0xff,(nodeData.fadeNumber));
			}

if (nodeData.re<100)
			{
				nodeColorDark = QColor(0xD0, 0x80, 0x00,(nodeData.fadeNumber));	
				nodeColor =QColor(0xff, 0xff, 0x00,(nodeData.fadeNumber));
			}
			else
			{
				nodeColor = QColor(0x00, 0xf0, 0xff,(nodeData.fadeNumber));
				nodeColorDark =QColor(0x00, 0x00, 0xff,(nodeData.fadeNumber));
			}

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Depending if nodeData.fadeNumber is lower 100 or bigger some colors are set. No problem.

But I think you are wondering about 0x00 or 0xFF. That are simple hexadecimal notations for 0 or 255...

Please also note our Newbie section.