public static Hsv IncrementColorComponent(
Hsv originalHsv,
HsvComponent component,
IncrementDirection direction,
IncrementAmount amount,
bool shouldWrap,
double minBound,
double maxBound)
{
Hsv newHsv = originalHsv;
if (amount == IncrementAmount.Small || !ColorHelper.ToDisplayNameExists)
{
// In order to avoid working with small values that can incur rounding issues,
// we'll multiple saturation and value by 100 to put them in the range of 0-100 instead of 0-1.
newHsv.S *= 100;
newHsv.V *= 100;
// Note: *valueToIncrement replaced with ref local variable for C#, must be initialized
ref double valueToIncrement = ref newHsv.H;
double incrementAmount = 0.0;
// If we're adding a small increment, then we'll just add or subtract 1.
// If we're adding a large increment, then we want to snap to the next
// or previous major value - for hue, this is every increment of 30;
// for saturation and value, this is every increment of 10.
switch (component)
{
case HsvComponent.Hue:
valueToIncrement = ref newHsv.H;
incrementAmount = amount == IncrementAmount.Small ? 1 : 30;
break;
case HsvComponent.Saturation:
valueToIncrement = ref newHsv.S;
incrementAmount = amount == IncrementAmount.Small ? 1 : 10;
break;
case HsvComponent.Value:
valueToIncrement = ref newHsv.V;
incrementAmount = amount == IncrementAmount.Small ? 1 : 10;
break;
default:
throw new InvalidOperationException("Invalid HsvComponent.");
}
double previousValue = valueToIncrement;
valueToIncrement += (direction == IncrementDirection.Lower ? -incrementAmount : incrementAmount);
// If the value has reached outside the bounds, we were previous at the boundary, and we should wrap,
// then we'll place the selection on the other side of the spectrum.
// Otherwise, we'll place it on the boundary that was exceeded.
if (valueToIncrement < minBound)
{
valueToIncrement = (shouldWrap && previousValue == minBound) ? maxBound : minBound;
}
if (valueToIncrement > maxBound)
{
valueToIncrement = (shouldWrap && previousValue == maxBound) ? minBound : maxBound;
}
// We multiplied saturation and value by 100 previously, so now we want to put them back in the 0-1 range.
newHsv.S /= 100;
newHsv.V /= 100;
}
public static Hsv IncrementColorChannel(
Hsv originalHsv,
ColorPickerHsvChannel channel,
IncrementDirection direction,
IncrementAmount amount,
bool shouldWrap,
double minBound,
double maxBound)
{
var newHsv = originalHsv;
if (amount == IncrementAmount.Small)
{
// In order to avoid working with small values that can incur rounding issues,
// we'll multiple saturation and value by 100 to put them in the range of 0-100 instead of 0-1.
newHsv.S *= 100;
newHsv.V *= 100;
ref var valueToIncrement = ref newHsv.H;
double incrementAmount = 0;
// If we're adding a small increment, then we'll just add or subtract 1.
// If we're adding a large increment, then we want to snap to the next
// or previous major value - for hue, this is every increment of 30;
// for saturation and value, this is every increment of 10.
switch (channel)
{
case ColorPickerHsvChannel.Hue:
valueToIncrement = ref newHsv.H;
incrementAmount = amount == IncrementAmount.Small ? 1 : 30;
break;
case ColorPickerHsvChannel.Saturation:
valueToIncrement = ref newHsv.S;
incrementAmount = amount == IncrementAmount.Small ? 1 : 10;
break;
case ColorPickerHsvChannel.Value:
valueToIncrement = ref newHsv.V;
incrementAmount = amount == IncrementAmount.Small ? 1 : 10;
break;
default:
throw new InvalidOperationException("Invalid ColorPickerHsvChannel.");
}
var previousValue = valueToIncrement;
valueToIncrement += direction == IncrementDirection.Lower ? -incrementAmount : incrementAmount;
// If the value has reached outside the bounds, we were previous at the boundary, and we should wrap,
// then we'll place the selection on the other side of the spectrum.
// Otherwise, we'll place it on the boundary that was exceeded.
if (valueToIncrement < minBound)
{
valueToIncrement = (shouldWrap && previousValue == minBound) ? maxBound : minBound;
}
if (valueToIncrement > maxBound)
{
valueToIncrement = (shouldWrap && previousValue == maxBound) ? minBound : maxBound;
}
// We multiplied saturation and value by 100 previously, so now we want to put them back in the 0-1 range.
newHsv.S /= 100;
newHsv.V /= 100;
}
