Refactoring

src/palette.cpp

@@ -0,0 +1,62 @@
+#include "palette.h"
+
+
+#define HUE_INIT		0.1f
+#define HUE_INCREMENT	0.62f
+#define SATURATION		0.99f
+#define VALUE			0.99f
+
+static unsigned hsv2rgb(float h, float s, float v)
+{
+	unsigned hi;
+	float r = 0, g = 0, b = 0, p, q, t, f;
+
+	hi = (unsigned)(h * 6.0f);
+	f = h * 6.0f - hi;
+	p = v * (1.0f - s);
+	q = v * (1.0f - f * s);
+	t = v * (1.0f - (1.0f - f) * s);
+
+	switch (hi) {
+		case 0:
+			r = v; g = t; b = p;
+			break;
+		case 1:
+			r = q; g = v; b = p;
+			break;
+		case 2:
+			r = p; g = v; b = t;
+			break;
+		case 3:
+			r = p; g = q; b = v;
+			break;
+		case 4:
+			r = t; g = p; b = v;
+			break;
+		case 5:
+			r = v; g = p; b = q;
+			break;
+	}
+
+	return ((unsigned)(r * 256) << 16)
+	  + ((unsigned)(g * 256) << 8)
+	  + (unsigned)(b * 256);
+}
+
+Palette::Palette()
+{
+	_hueState = HUE_INIT;
+}
+
+QColor Palette::color()
+{
+	_hueState += HUE_INCREMENT;
+	_hueState -= (int) _hueState;
+
+	return QColor(hsv2rgb(_hueState, SATURATION, VALUE));
+}
+
+void Palette::reset()
+{
+	_hueState = HUE_INIT;
+}