Method updateFromColour

Demos/Demo_Colour/ColourPanel.cpp:215–282

	}

	void ColourPanel::updateFromColour(const MyGUI::Colour& _colour)
	{
		mCurrentColour = _colour;

		std::vector<float> vec;
		vec.push_back(_colour.red);
		vec.push_back(_colour.green);
		vec.push_back(_colour.blue);
		std::sort(vec.begin(), vec.end());

		MyGUI::IntPoint point(
			static_cast<int>((1 - vec[0] / vec[2]) * mColourRect->getWidth()),
			static_cast<int>((1 - vec[2]) * mColourRect->getHeight()));
		mImageColourPicker->setPosition(
			point.left - (mImageColourPicker->getWidth() / 2),
			point.top - (mImageColourPicker->getHeight() / 2));

		int iMax = (_colour.red == vec[2]) ? 0 : (_colour.green == vec[2]) ? 1 : 2;
		int iMin = (_colour.red == vec[0]) ? 0 : (_colour.green == vec[0]) ? 1 : 2;
		int iAvg = 3 - iMax - iMin;

		if (iMin == iMax) // if gray colour - set base red
		{
			iMax = 0;
			iMin = 1;
			iAvg = 2;
			byIndex(mBaseColour, iMin) = 0.;
			byIndex(mBaseColour, iAvg) = 0.;
			byIndex(mBaseColour, iMax) = 1.;
		}
		else
		{
			byIndex(mBaseColour, iMin) = 0.;
			byIndex(mBaseColour, iAvg) = (vec[1] - vec[0]) / (vec[2] - vec[0]);
			byIndex(mBaseColour, iMax) = 1.;
		}


		int i;
		for (i = 0; i < 6; ++i)
		{
			if ((std::abs(byIndex(mColourRange[i], iMin) - byIndex(mBaseColour, iMin)) < 0.001f) &&
				(std::abs(byIndex(mColourRange[i], iMax) - byIndex(mBaseColour, iMax)) < 0.001f) &&
				(std::abs(byIndex(mColourRange[i + 1], iMin) - byIndex(mBaseColour, iMin)) < 0.001f) &&
				(std::abs(byIndex(mColourRange[i + 1], iMax) - byIndex(mBaseColour, iMax)) < 0.001f))
				break;
		}

		float sector_size = (float)mScrollRange->getScrollRange() / 6.0f;
		size_t current = i;

		float offset = byIndex(mBaseColour, iAvg);
		if (byIndex(mColourRange[i + 1], iAvg) < byIndex(mColourRange[i], iAvg))
			offset = 1 - byIndex(mBaseColour, iAvg);

		size_t pos = size_t((current + offset) * sector_size);

		mScrollRange->setScrollPosition(pos);