How to mix two colors represented by QColor type ?

[sibislaw2]

Hi, i want to mix two colors represented by QColor type in my C++ code. How to do it 'simple way' ? Like

@QColor a, b, c;

c=a+b@

[p3c0]

Hi,

You can't do it by adding. There's no overloaded "+" operator for QColor.
Instead you can try this,
@
QColor a(Qt::red);
QColor b(Qt::green);

QColor c;
c.setRgb(a.red(),b.green(),0);
@

So c becomes yellow.

[ankursaxena]

Actually when you use color in qt. It is already mixture of 3 colors based on rgb or any other system.

If you are using rgb system then there will be 3 colors mixture.

Example taken by p3c0 is showed that there are 3 colors one is Qt::red, second is Qt::green and third one and last is 0 means black.

So it is mixture of red,green and black.

[giordi]

This is how I usually blend two QColors togheter

QColor(
color1.red()* (1-r) + color2.red()r,
color1.green() (1-r) + color2.green()r,
color1.blue() (1-r) + color2.blue()*r,
255));

where r is the ratio of the color for example 0.5 will give you a 50-50 blend