Qt ------ 自定义QVector<T>中的T
Qt 自定义 gt lt ------
2023-09-11 14:19:53 时间
#ifndef FREQUENCYSPECTRUM_H #define FREQUENCYSPECTRUM_H #include <QtCore/QVector> /** * Represents a frequency spectrum as a series of elements, each of which * consists of a frequency, an amplitude and a phase. */ class FrequencySpectrum { public: FrequencySpectrum(int numPoints = 0); struct Element { Element() : frequency(0.0), amplitude(0.0), phase(0.0), clipped(false) { } /** * Frequency in Hertz */ qreal frequency; /** * Amplitude in range [0.0, 1.0] */ qreal amplitude; /** * Phase in range [0.0, 2*PI] */ qreal phase; /** * Indicates whether value has been clipped during spectrum analysis */ bool clipped; }; typedef QVector<Element>::iterator iterator; typedef QVector<Element>::const_iterator const_iterator; void reset(); int count() const; Element& operator[](int index); const Element& operator[](int index) const; iterator begin(); iterator end(); const_iterator begin() const; const_iterator end() const; private: QVector<Element> m_elements; }; #endif // FREQUENCYSPECTRUM_H
#include "frequencyspectrum.h" FrequencySpectrum::FrequencySpectrum(int numPoints) : m_elements(numPoints)//等于m_elements.resize(numPoints); { } void FrequencySpectrum::reset() { iterator i = begin(); for ( ; i != end(); ++i) *i = Element(); } int FrequencySpectrum::count() const { return m_elements.count(); } FrequencySpectrum::Element &FrequencySpectrum::operator[](int index) { return m_elements[index]; } const FrequencySpectrum::Element &FrequencySpectrum::operator[](int index) const { return m_elements[index]; } FrequencySpectrum::iterator FrequencySpectrum::begin() { return m_elements.begin(); } FrequencySpectrum::iterator FrequencySpectrum::end() { return m_elements.end(); } FrequencySpectrum::const_iterator FrequencySpectrum::begin() const { return m_elements.begin(); } FrequencySpectrum::const_iterator FrequencySpectrum::end() const { return m_elements.end(); }
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