253 lines
13 KiB
C++
253 lines
13 KiB
C++
#include "Spectrum.h"
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#include "Curve_Sampling.h"
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#include <algorithm>
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#include <cmath>
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#include <iomanip>
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#include <sstream>
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namespace renderive {
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namespace detail {
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namespace {
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struct Spectrum_Runtime_Base {};
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struct Spectrum_Runtime {
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std::vector<double> samples;
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std::vector<double> maxima;
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std::vector<double> minima;
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std::vector<double> markers;
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int selected_marker = -1;
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Hover_Tooltip_Runtime tooltip;
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};
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using Spectrum_Runtime_State = Double_State_Strategy<Spectrum_Runtime_Base, Spectrum_Runtime>;
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RectF axes_rect(const Axis_Transform& horizontal, const Axis_Transform& vertical) {
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const double x1 = horizontal.coord_to_pixel(horizontal.coordinate_range.origin);
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const double x2 = horizontal.coord_to_pixel(horizontal.coordinate_range.target);
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const double y1 = vertical.coord_to_pixel(vertical.coordinate_range.origin);
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const double y2 = vertical.coord_to_pixel(vertical.coordinate_range.target);
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return {std::min(x1, x2), std::min(y1, y2), std::abs(x2 - x1), std::abs(y2 - y1)};
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}
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void draw_curve(Painter& painter, std::span<const double> values, Range domain, const Axis_Transform& x_axis, const Axis_Transform& y_axis, bool visible_only, Line_Interpolation_Mode interpolation, const Pen& pen, const Brush& brush) {
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auto points = curve_points(values, domain, x_axis, y_axis, visible_only, interpolation);
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if(points.size() < 2)
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return;
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if(brush.enabled()) {
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std::vector<PointF> polygon;
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polygon.reserve(points.size() + 2);
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polygon.push_back({points.front().x, y_axis.coord_to_pixel(y_axis.coordinate_range.target)});
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polygon.insert(polygon.end(), points.begin(), points.end());
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polygon.push_back({points.back().x, y_axis.coord_to_pixel(y_axis.coordinate_range.target)});
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painter.polygon(polygon, Pen{.style = Line_Style::None}, brush);
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}
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painter.polyline(points, pen);
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}
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double spectrum_power_at(const Spectrum_Properties& properties, const Spectrum_Runtime& runtime, double frequency, bool& ok) {
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ok = false;
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if(runtime.samples.empty() || !properties.frequency_range.contains(frequency) || properties.frequency_range.length() == 0.0)
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return 0.0;
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const double normalized = (frequency - properties.frequency_range.origin) / properties.frequency_range.length();
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const double position = std::clamp(normalized, 0.0, 1.0) * static_cast<double>(runtime.samples.size() - 1);
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const auto lower = static_cast<std::size_t>(std::floor(position));
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const auto upper = std::min(lower + 1, runtime.samples.size() - 1);
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const double fraction = position - static_cast<double>(lower);
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ok = true;
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return runtime.samples[lower] * (1.0 - fraction) + runtime.samples[upper] * fraction;
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}
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}
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struct Spectrum_Control::Impl {
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Impl(std::shared_ptr<Frequency_Axis> frequency, std::shared_ptr<Axis> power) : frequency_axis(std::move(frequency)), power_axis(std::move(power)) {}
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std::shared_ptr<Frequency_Axis> frequency_axis;
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std::shared_ptr<Axis> power_axis;
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Spectrum_Runtime_State runtime;
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};
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Spectrum_Control::Spectrum_Control(Plot_Core& plot, const Spectrum_Properties& properties, std::shared_ptr<Frequency_Axis> frequency_axis, std::shared_ptr<Axis> power_axis)
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: Plottable_State(plot, properties), impl_(std::make_unique<Impl>(std::move(frequency_axis), std::move(power_axis))) {}
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Spectrum_Control::~Spectrum_Control() = default;
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void Spectrum_Control::update_samples(std::span<const double> values) {
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if(get<&Spectrum_Properties::frequency_point_size>() <= 0)
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set<&Spectrum_Properties::frequency_point_size>(static_cast<int>(values.size()));
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impl_->runtime.update([values](Spectrum_Runtime& runtime) {
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runtime.samples.assign(values.begin(), values.end());
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if(runtime.maxima.size() != values.size())
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runtime.maxima.assign(values.begin(), values.end());
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else
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for(std::size_t index = 0; index < values.size(); ++index)
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runtime.maxima[index] = std::max(runtime.maxima[index], values[index]);
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if(runtime.minima.size() != values.size())
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runtime.minima.assign(values.begin(), values.end());
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else
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for(std::size_t index = 0; index < values.size(); ++index)
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runtime.minima[index] = std::min(runtime.minima[index], values[index]);
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});
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changed();
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}
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void Spectrum_Control::update_samples(std::pmr::vector<double>&& values) {
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update_samples(std::span<const double>(values.data(), values.size()));
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}
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std::size_t Spectrum_Control::sample_count() const {
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return impl_->runtime.read([](const Spectrum_Runtime& runtime) { return runtime.samples.size(); });
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}
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std::size_t Spectrum_Control::rendered_point_count() const {
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const auto state = properties();
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const auto runtime = impl_->runtime.read([](const Spectrum_Runtime& value) { return value; });
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return curve_points(runtime.samples, state.frequency_range, impl_->frequency_axis->transform(), impl_->power_axis->transform(), state.visible_range_only, state.interpolation_mode).size();
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}
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double Spectrum_Control::power_at(double frequency, bool& ok) const {
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const auto state = properties();
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return impl_->runtime.read([&](const Spectrum_Runtime& runtime) { return spectrum_power_at(state, runtime, frequency, ok); });
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}
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void Spectrum_Control::add_custom_marker(double frequency) {
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add_custom_line_marker(frequency);
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}
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void Spectrum_Control::add_custom_line_marker(double frequency) {
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impl_->runtime.update([frequency](Spectrum_Runtime& runtime) { runtime.markers.push_back(frequency); });
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changed();
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}
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void Spectrum_Control::remove_custom_marker(double frequency) {
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bool removed{};
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impl_->runtime.update([&](Spectrum_Runtime& runtime) {
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if(runtime.markers.empty())
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return;
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auto closest = std::min_element(runtime.markers.begin(), runtime.markers.end(), [frequency](double left, double right) { return std::abs(left - frequency) < std::abs(right - frequency); });
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const int removed_index = static_cast<int>(std::distance(runtime.markers.begin(), closest));
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runtime.markers.erase(closest);
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if(runtime.selected_marker == removed_index)
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runtime.selected_marker = -1;
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else if(runtime.selected_marker > removed_index)
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--runtime.selected_marker;
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removed = true;
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});
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if(removed)
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changed();
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}
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void Spectrum_Control::remove_selected_marker() {
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bool removed{};
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impl_->runtime.update([&](Spectrum_Runtime& runtime) {
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if(runtime.selected_marker < 0 || runtime.selected_marker >= static_cast<int>(runtime.markers.size()))
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return;
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runtime.markers.erase(runtime.markers.begin() + runtime.selected_marker);
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runtime.selected_marker = -1;
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removed = true;
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});
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if(removed)
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changed();
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}
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void Spectrum_Control::clear_custom_markers() {
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impl_->runtime.update([](Spectrum_Runtime& runtime) {
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runtime.markers.clear();
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runtime.selected_marker = -1;
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});
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changed();
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}
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int Spectrum_Control::selectable_line_marker_count() const {
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return impl_->runtime.read([](const Spectrum_Runtime& runtime) { return static_cast<int>(runtime.markers.size()); });
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}
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int Spectrum_Control::selected_marker_index() const {
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return impl_->runtime.get<&Spectrum_Runtime::selected_marker>();
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}
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void Spectrum_Control::set_selected_marker_index(int index) {
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impl_->runtime.update([index](Spectrum_Runtime& runtime) { runtime.selected_marker = index >= 0 && index < static_cast<int>(runtime.markers.size()) ? index : -1; });
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changed();
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}
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void Spectrum_Control::select_next_marker() {
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impl_->runtime.update([](Spectrum_Runtime& runtime) {
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if(runtime.markers.empty())
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runtime.selected_marker = -1;
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else
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runtime.selected_marker = (runtime.selected_marker + 1) % static_cast<int>(runtime.markers.size());
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});
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changed();
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}
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void Spectrum_Control::select_previous_marker() {
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impl_->runtime.update([](Spectrum_Runtime& runtime) {
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if(runtime.markers.empty())
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runtime.selected_marker = -1;
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else
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runtime.selected_marker = (runtime.selected_marker <= 0 ? static_cast<int>(runtime.markers.size()) : runtime.selected_marker) - 1;
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});
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changed();
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}
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void Spectrum_Control::clear_marker_selection() {
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set_selected_marker_index(-1);
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}
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double Spectrum_Control::marker_frequency(int index) const {
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return impl_->runtime.read([index](const Spectrum_Runtime& runtime) { return index >= 0 && index < static_cast<int>(runtime.markers.size()) ? runtime.markers[index] : 0.0; });
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}
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void Spectrum_Control::set_marker_frequency(int index, double frequency) {
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bool updated{};
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impl_->runtime.update([&](Spectrum_Runtime& runtime) {
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if(index < 0 || index >= static_cast<int>(runtime.markers.size()))
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return;
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runtime.markers[index] = frequency;
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updated = true;
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});
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if(updated)
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changed();
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}
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void Spectrum_Control::set_current_marker_frequency(double frequency) {
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const int index = selected_marker_index();
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if(index >= 0)
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set_marker_frequency(index, frequency);
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}
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void Spectrum_Control::handle_event(const Event& event) {
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bool updated{};
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impl_->runtime.update([&](Spectrum_Runtime& runtime) { updated = update_hover_tooltip(runtime.tooltip, event); });
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if(updated)
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changed();
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}
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void Spectrum_Control::publish() {
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publish_properties();
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impl_->runtime.publish();
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}
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void Spectrum_Control::paint(Painter& painter) {
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const auto state = render_properties();
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const auto runtime = impl_->runtime.render_use_state();
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const Axis_Transform horizontal = impl_->frequency_axis->transform();
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const Axis_Transform vertical = impl_->power_axis->transform();
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const RectF content = axes_rect(horizontal, vertical);
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if(state.sweep_region_visible) {
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const double first = horizontal.coord_to_pixel(state.sweep_frequency_range.origin);
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const double last = horizontal.coord_to_pixel(state.sweep_frequency_range.target);
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painter.rect({std::min(first, last), content.y, std::abs(last - first), content.height}, Pen{.style = Line_Style::None}, state.sweep_region_brush);
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}
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if(state.max_hold_visible)
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draw_curve(painter, runtime.maxima, state.frequency_range, horizontal, vertical, state.visible_range_only, state.interpolation_mode, state.max_pen, state.max_brush);
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if(state.min_hold_visible)
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draw_curve(painter, runtime.minima, state.frequency_range, horizontal, vertical, state.visible_range_only, state.interpolation_mode, state.min_pen, state.min_brush);
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draw_curve(painter, runtime.samples, state.frequency_range, horizontal, vertical, state.visible_range_only, state.interpolation_mode, state.current_pen, state.current_brush);
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if(state.middle_frequency_pen.enabled()) {
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const double x = horizontal.coord_to_pixel(state.center_frequency);
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painter.line({x, content.y}, {x, content.bottom()}, state.middle_frequency_pen);
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}
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for(std::size_t index = 0; index < runtime.markers.size(); ++index) {
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const double x = horizontal.coord_to_pixel(runtime.markers[index]);
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painter.line({x, content.y}, {x, content.bottom()}, static_cast<int>(index) == runtime.selected_marker ? state.selected_marker_pen : state.marker_pen);
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}
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if(!runtime.samples.empty() && (state.max_marker_visible || state.use_min_marker)) {
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const auto draw_extreme = [&](bool maximum) {
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auto iterator = maximum ? std::max_element(runtime.samples.begin(), runtime.samples.end()) : std::min_element(runtime.samples.begin(), runtime.samples.end());
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const std::size_t index = static_cast<std::size_t>(std::distance(runtime.samples.begin(), iterator));
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const double denominator = runtime.samples.size() > 1 ? runtime.samples.size() - 1.0 : 1.0;
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const double frequency = state.frequency_range.origin + state.frequency_range.length() * index / denominator;
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const PointF point{horizontal.coord_to_pixel(frequency), vertical.coord_to_pixel(*iterator)};
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const Pen& pen = maximum ? state.max_pen : state.min_pen;
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painter.circle(point, 3.0, pen, Brush{pen.color, Brush_Style::Solid});
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};
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if(state.max_marker_visible)
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draw_extreme(true);
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if(state.use_min_marker)
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draw_extreme(false);
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}
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if(state.tooltip_enabled && runtime.tooltip.active && content.contains(runtime.tooltip.position)) {
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const double frequency = horizontal.pixel_to_coord(runtime.tooltip.position.x);
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bool ok{};
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const double power = spectrum_power_at(state, runtime, frequency, ok);
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if(ok) {
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std::ostringstream text;
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text << std::fixed << std::setprecision(2) << frequency << " Hz " << power;
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const RectF box{runtime.tooltip.position.x + 8.0, runtime.tooltip.position.y + 8.0, 170.0, 24.0};
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painter.rect(box, Pen{state.tooltip_text_pen.color}, state.tooltip_background_brush);
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painter.text({box.x + 4.0, box.y + 3.0}, text.str(), state.tooltip_font, state.tooltip_text_pen);
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}
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}
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}
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}
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}
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