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https://github.com/UpsilonNumworks/Upsilon.git
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213 lines
6.9 KiB
C++
213 lines
6.9 KiB
C++
#include "interactive_curve_view_range.h"
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#include <poincare.h>
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#include <ion.h>
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#include <math.h>
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#include <stddef.h>
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#include <assert.h>
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using namespace Poincare;
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namespace Shared {
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InteractiveCurveViewRange::InteractiveCurveViewRange(CurveViewCursor * cursor, InteractiveCurveViewRangeDelegate * delegate) :
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MemoizedCurveViewRange(),
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m_yAuto(true),
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m_delegate(delegate),
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m_cursor(cursor)
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{
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}
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void InteractiveCurveViewRange::setCursor(CurveViewCursor * cursor) {
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m_cursor = cursor;
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}
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uint32_t InteractiveCurveViewRange::rangeChecksum() {
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float data[5] = {m_xMin, m_xMax, m_yMin, m_yMax, m_yAuto ? 1.0f : 0.0f};
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size_t dataLengthInBytes = 5*sizeof(float);
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assert((dataLengthInBytes & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
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return Ion::crc32((uint32_t *)data, dataLengthInBytes>>2);
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}
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bool InteractiveCurveViewRange::yAuto() {
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return m_yAuto;
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}
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void InteractiveCurveViewRange::setXMin(float xMin) {
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float newXMin = xMin;
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MemoizedCurveViewRange::setXMin(clipped(newXMin, false));
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if (m_xMax - newXMin < k_minFloat) {
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newXMin = m_xMax - k_minFloat;
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MemoizedCurveViewRange::setXMin(clipped(newXMin, false));
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}
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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 InteractiveCurveViewRange::setXMax(float xMax) {
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float newXMax = xMax;
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MemoizedCurveViewRange::setXMax(clipped(newXMax, true));
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if (newXMax - m_xMin < k_minFloat) {
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newXMax = m_xMin + k_minFloat;
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MemoizedCurveViewRange::setXMax(clipped(newXMax, true));
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}
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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 InteractiveCurveViewRange::setYMin(float yMin) {
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float newYMin = yMin;
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MemoizedCurveViewRange::setYMin(clipped(newYMin, false));
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if (m_yMax - newYMin < k_minFloat) {
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newYMin = m_yMax - k_minFloat;
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MemoizedCurveViewRange::setYMin(clipped(newYMin, false));
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}
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}
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void InteractiveCurveViewRange::setYMax(float yMax) {
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float newYMax = yMax;
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MemoizedCurveViewRange::setYMax(clipped(newYMax, true));
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if (newYMax - m_yMin < k_minFloat) {
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newYMax = m_yMin + k_minFloat;
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MemoizedCurveViewRange::setYMax(clipped(newYMax, true));
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}
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}
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void InteractiveCurveViewRange::setYAuto(bool yAuto) {
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m_yAuto = yAuto;
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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 InteractiveCurveViewRange::zoom(float ratio) {
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float xMin = m_xMin;
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float xMax = m_xMax;
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float yMin = m_yMin;
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float yMax = m_yMax;
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if (2.0f*ratio*fabsf(xMax-xMin) < k_minFloat || 2.0f*ratio*fabsf(yMax-yMin) < k_minFloat) {
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return;
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}
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m_xMin = clipped((xMax+xMin)/2.0f - ratio*fabsf(xMax-xMin), false);
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m_xMax = clipped((xMax+xMin)/2.0f + ratio*fabsf(xMax-xMin), true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yAuto = false;
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m_yMin = clipped((yMax+yMin)/2.0f - ratio*fabsf(yMax-yMin), false);
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m_yMax = clipped((yMax+yMin)/2.0f + ratio*fabsf(yMax-yMin), true);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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}
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void InteractiveCurveViewRange::panWithVector(float x, float y) {
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m_yAuto = false;
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if (clipped(m_xMin + x, false) != m_xMin + x || clipped(m_xMax + x, true) != m_xMax + x || clipped(m_yMin + y, false) != m_yMin + y || clipped(m_yMax + y, true) != m_yMax + y) {
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return;
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}
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m_xMin = clipped(m_xMin + x, false);
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m_xMax = clipped(m_xMax + x, true);
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m_yMin = clipped(m_yMin + y, false);
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m_yMax = clipped(m_yMax + y, true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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}
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void InteractiveCurveViewRange::roundAbscissa() {
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float xMin = m_xMin;
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float xMax = m_xMax;
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m_xMin = clipped(roundf((xMin+xMax)/2) - (float)Ion::Display::Width/2.0f, false);
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m_xMax = clipped(roundf((xMin+xMax)/2) + (float)Ion::Display::Width/2.0f-1.0f, true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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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 InteractiveCurveViewRange::normalize() {
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float xMin = m_xMin;
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float xMax = m_xMax;
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float yMin = m_yMin;
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float yMax = m_yMax;
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m_xMin = clipped((xMin+xMax)/2 - 5.3f, false);
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m_xMax = clipped((xMin+xMax)/2 + 5.3f, true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yAuto = false;
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m_yMin = clipped((yMin+yMax)/2 - 3.1f, false);
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m_yMax = clipped((yMin+yMax)/2 + 3.1f, true);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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}
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void InteractiveCurveViewRange::setTrigonometric() {
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m_xMin = -10.5f;
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m_xMax = 10.5f;
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if (Preferences::sharedPreferences()->angleUnit() == Expression::AngleUnit::Degree) {
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m_xMin = -600;
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m_xMax = 600;
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}
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yAuto = false;
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m_yMin = -1.6f;
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m_yMax = 1.6f;
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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}
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void InteractiveCurveViewRange::setDefault() {
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m_xMin = -10.0f;
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m_xMax = 10.0f;
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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setYAuto(true);
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}
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void InteractiveCurveViewRange::centerAxisAround(Axis axis, float position) {
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if (axis == Axis::X) {
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float range = m_xMax - m_xMin;
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m_xMin = clipped(position - range/2.0f, false);
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m_xMax = clipped(position + range/2.0f, true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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} else {
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m_yAuto = false;
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float range = m_yMax - m_yMin;
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m_yMin = clipped(position - range/2.0f, false);
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m_yMax = clipped(position + range/2.0f, true);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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}
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}
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void InteractiveCurveViewRange::panToMakePointVisible(float x, float y, float topMarginRatio, float rightMarginRatio, float bottomMarginRation, float leftMarginRation) {
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float xRange = m_xMax - m_xMin;
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float yRange = m_yMax - m_yMin;
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if (x < m_xMin + leftMarginRation*xRange && !isinf(x) && !isnan(x)) {
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m_xMin = clipped(x - leftMarginRation*xRange, false);
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m_xMax = clipped(m_xMin + xRange, true);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yAuto = false;
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}
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if (x > m_xMax - rightMarginRatio*xRange && !isinf(x) && !isnan(x)) {
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m_xMax = clipped(x + rightMarginRatio*xRange, true);
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m_xMin = clipped(m_xMax - xRange, false);
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m_xGridUnit = computeGridUnit(Axis::X, m_xMin, m_xMax);
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m_yAuto = false;
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}
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if (y < m_yMin + bottomMarginRation*yRange && !isinf(y) && !isnan(y)) {
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m_yMin = clipped(y - bottomMarginRation*yRange, false);
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m_yMax = clipped(m_yMin + yRange, true);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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m_yAuto = false;
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}
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if (y > m_yMax - topMarginRatio*yRange && !isinf(y) && !isnan(y)) {
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m_yMax = clipped(y + topMarginRatio*yRange, true);
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m_yMin = clipped(m_yMax - yRange, false);
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m_yGridUnit = computeGridUnit(Axis::Y, m_yMin, m_yMax);
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m_yAuto = false;
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}
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}
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float InteractiveCurveViewRange::clipped(float x, bool isMax) {
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float max = isMax ? k_upperMaxFloat : k_lowerMaxFloat;
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float min = isMax ? -k_lowerMaxFloat : -k_upperMaxFloat;
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float clippedX = x > max ? max : x;
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clippedX = clippedX < min ? min : clippedX;
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return clippedX;
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}
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}
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