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5d1ef0f3f0
Put two sequences u(n+1)=u(n) and v(n+1) = v(n), u(100) = 50, v(50) = 8. Basic settings computed the x range as [0,10] before, now it is [50,110].
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
#include "curve_view_range.h"
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#include <cmath>
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#include <ion.h>
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#include <poincare/preferences.h>
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using namespace Shared;
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using namespace Poincare;
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namespace Sequence {
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CurveViewRange::CurveViewRange(CurveViewCursor * cursor, InteractiveCurveViewRangeDelegate * delegate) :
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InteractiveCurveViewRange(cursor, delegate)
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{
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m_xMin = -k_displayLeftMarginRatio * m_xMax;
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}
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void CurveViewRange::roundAbscissa() {
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int roundedXMean = std::round((m_xMin+m_xMax)/2);
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float halfScreenWidth = ((float)Ion::Display::Width)/2.0f;
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float newXMin = clipped(roundedXMean - halfScreenWidth, false);
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float newXMax = clipped(roundedXMean + halfScreenWidth - 1.0f, true);
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if (std::isnan(newXMin) || std::isnan(newXMax)) {
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return;
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}
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m_xMin = newXMin;
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m_xMax = newXMax;
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float interestingXMin = m_delegate->interestingXMin();
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if (m_xMin < interestingXMin) {
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m_xMin = interestingXMin - k_displayLeftMarginRatio * (float)Ion::Display::Width;
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m_xMax = m_xMin + (float)Ion::Display::Width;
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}
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m_xGridUnit = computeGridUnit(Axis::X, m_xMax - m_xMin);
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if (m_delegate) {
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m_delegate->didChangeRange(this);
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}
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}
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void CurveViewRange::normalize() {
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float xMean = (m_xMin+m_xMax)/2;
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float yMean = (m_yMin+m_yMax)/2;
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// Compute the X
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float newXMin = clipped(xMean - NormalizedXHalfRange(), false);
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float newXMax = clipped(xMean + NormalizedXHalfRange(), true);
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if (!std::isnan(newXMin) && !std::isnan(newXMax)) {
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m_xMin = newXMin;
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m_xMax = newXMax;
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m_xGridUnit = computeGridUnit(Axis::X, m_xMax - m_xMin);
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}
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float interestingXMin = m_delegate->interestingXMin();
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if (m_xMin < interestingXMin) {
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m_xMin = interestingXMin -k_displayLeftMarginRatio*2.0f*NormalizedXHalfRange();
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m_xMax = m_xMin + 2.0f*NormalizedXHalfRange();
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}
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// Compute the Y
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m_yAuto = false;
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float newYMin = clipped(yMean - NormalizedYHalfRange(), false);
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float newYMax = clipped(yMean + NormalizedYHalfRange(), true);
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if (!std::isnan(newYMin) && !std::isnan(newYMax)) {
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m_yMin = newYMin;
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m_yMax = newYMax;
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMax - m_yMin);
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}
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}
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void CurveViewRange::setTrigonometric() {
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float interestingXMin = m_delegate->interestingXMin();
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float interestingXRange = Preferences::sharedPreferences()->angleUnit() == Preferences::AngleUnit::Degree ? 1200.0f : 21.0f;
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m_xMin = interestingXMin - k_displayLeftMarginRatio * interestingXRange;
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m_xMax = interestingXMin + interestingXRange;
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m_xGridUnit = computeGridUnit(Axis::X, m_xMax - m_xMin);
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m_yAuto = false;
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constexpr float y = 1.6f;
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m_yMin = -y;
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m_yMax = y;
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMax - m_yMin);
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}
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void CurveViewRange::setDefault() {
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if (m_delegate == nullptr) {
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return;
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}
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float interestingXMin = m_delegate->interestingXMin();
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float interestingXRange = m_delegate->interestingXHalfRange();
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m_xMin = interestingXMin - k_displayLeftMarginRatio * interestingXRange;
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m_xMax = interestingXMin + interestingXRange;
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m_xGridUnit = computeGridUnit(Axis::X, m_xMax - m_xMin);
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setYAuto(true);
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}
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}
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