interactive_curve_view_range_delegate.cpp
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#include "interactive_curve_view_range_delegate.h"
#include "interactive_curve_view_range.h"
#include <cmath>
#include <float.h>
namespace Shared {
bool InteractiveCurveViewRangeDelegate::didChangeRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
if (!interactiveCurveViewRange->yAuto()) {
return false;
}
Range yRange = computeYRange(interactiveCurveViewRange);
float max = yRange.max;
float min = yRange.min;
float range = max - min;
if (max < min) {
range = 0.0f;
}
if (interactiveCurveViewRange->yMin() == addMargin(min, range, true) && interactiveCurveViewRange->yMax() == addMargin(max, range, false)) {
return false;
}
if (min == max) {
float step = max != 0.0f ? interactiveCurveViewRange->computeGridUnit(CurveViewRange::Axis::Y, 0.0f, max) : 1.0f;
min = min - step;
max = max + step;
}
if (min == FLT_MAX && max == -FLT_MAX) {
min = -1.0f;
max = 1.0f;
}
if (min == FLT_MAX) {
float step = max != 0.0f ? interactiveCurveViewRange->computeGridUnit(CurveViewRange::Axis::Y, 0.0f, std::fabs(max)) : 1.0f;
min = max-step;
}
if (max == -FLT_MAX) {
float step = min != 0.0f ? interactiveCurveViewRange->computeGridUnit(CurveViewRange::Axis::Y, 0.0f, std::fabs(min)) : 1.0f;
max = min+step;
}
interactiveCurveViewRange->setYMin(addMargin(min, range, true));
interactiveCurveViewRange->setYMax(addMargin(max, range, false));
if (std::isinf(interactiveCurveViewRange->xMin())) {
interactiveCurveViewRange->setYMin(-FLT_MAX);
}
if (std::isinf(interactiveCurveViewRange->xMax())) {
interactiveCurveViewRange->setYMax(FLT_MAX);
}
return true;
}
}