mirror of
https://github.com/supleed2/ELEC60013-ES-CW2.git
synced 2024-09-19 21:26:17 +00:00
91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
#include <knob>
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Knob::Knob(int minimum, int maximum, int initialRotation) {
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Knob::minimum = minimum;
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Knob::maximum = maximum;
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Knob::A = false;
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Knob::B = false;
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Knob::previousRotation = NONE;
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Knob::rotation = initialRotation;
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Knob::rotationInternal = initialRotation;
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}
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int Knob::getRotation() {
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return Knob::rotation;
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};
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void Knob::setRotation(int newRotation) {
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rotation = newRotation;
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rotationInternal = newRotation;
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};
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void Knob::updateRotation(bool ANew, bool BNew) {
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if (A == ANew && B == BNew)
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return; // No change, do not update values
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bool fullstep = (BNew && ANew) || (!BNew && !ANew);
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bool cwRot = (!B && !A && !BNew && ANew) ||
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(!B && A && BNew && ANew) ||
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(B && !A && !BNew && !ANew) ||
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(B && A && BNew && !ANew);
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bool acwRot = (!B && !A && BNew && !ANew) ||
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(!B && A && !BNew && !ANew) ||
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(B && !A && BNew && ANew) ||
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(B && A && !BNew && ANew);
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bool impossible = (!B && !A && BNew && ANew) ||
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(!B && A && BNew && !ANew) ||
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(B && !A && !BNew && ANew) ||
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(B && A && !BNew && !ANew);
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if (cwRot) {
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if (previousRotation == CW && fullstep) {
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rotationInternal++;
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} else if (previousRotation == ACW && fullstep) {
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previousRotation = NONE;
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} else {
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previousRotation = CW;
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}
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} else if (acwRot) {
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if (previousRotation == ACW && fullstep) {
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rotationInternal--;
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} else if (previousRotation == CW && fullstep) {
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previousRotation = NONE;
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} else {
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previousRotation = ACW;
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}
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} else if (impossible) {
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if (fullstep) {
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switch (previousRotation) {
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case NONE: // Step skipped and no previous direction
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break;
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case CW:
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rotationInternal++;
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break;
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case ACW:
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rotationInternal--;
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break;
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}
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}
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}
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A = ANew;
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B = BNew;
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if (rotationInternal < minimum)
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rotationInternal = minimum;
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if (rotationInternal > maximum)
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rotationInternal = maximum;
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rotation = rotationInternal;
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}
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void Knob::changeLimitsVolume(int newMinimum, int newMaximum) {
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if (newMaximum > maximum) {
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rotation = rotation << 1;
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} else if (newMaximum < maximum) {
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rotation = rotation >> 1;
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} else {
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}
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minimum = newMinimum;
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maximum = newMaximum;
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}; |