114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
//#ifdef _WINDOWS
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//#include <windows.h>
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//#else
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//#include <sys/ioctl.h>
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//#endif
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#include "progress_bar.h"
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ProgressBar::ProgressBar() {}
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ProgressBar::ProgressBar(unsigned long n_, const char* description_, std::ostream& out_){
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n = n_;
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frequency_update = n_;
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description = description_;
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out = &out_;
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unit_bar = "\u2588";
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unit_space = "-";
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desc_width = std::strlen(description); // character width of description field
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}
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void ProgressBar::SetFrequencyUpdate(unsigned long frequency_update_){
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if(frequency_update_ > n){
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frequency_update = n; // prevents crash if freq_updates_ > n_
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}
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else{
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frequency_update = frequency_update_;
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}
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}
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void ProgressBar::SetStyle(const char* unit_bar_, const char* unit_space_){
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unit_bar = unit_bar_;
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unit_space = unit_space_;
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}
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int ProgressBar::GetConsoleWidth(){
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int width;
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#ifdef _WINDOWS
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CONSOLE_SCREEN_BUFFER_INFO csbi;
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GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
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width = csbi.srWindow.Right - csbi.srWindow.Left;
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#else
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struct winsize win;
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//注意！当我们使用pipe here-doc等通道获取程序参数时无法正确的获取窗口大小 此时我们将使用预定值
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if (ioctl(0, TIOCGWINSZ, &win) != -1)
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width = win.ws_col;
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else width = 100;
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#endif
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return width;
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}
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int ProgressBar::GetBarLength(){
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// get console width and according adjust the length of the progress bar
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int bar_length = static_cast<int>((GetConsoleWidth() - desc_width - CHARACTER_WIDTH_PERCENTAGE) / 2.);
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return bar_length;
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}
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void ProgressBar::ClearBarField(){
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for(int i=0;i<GetConsoleWidth();++i){
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*out << " ";
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}
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*out << "\r" << std::flush;
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}
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void ProgressBar::Progressed(unsigned long idx_)
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{
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try{
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if(idx_ > n) throw idx_;
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// determines whether to update the progress bar from frequency_update
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if ((idx_ != n-1) && ((idx_+1) % (n/frequency_update) != 0)) return;
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// calculate the size of the progress bar
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int bar_size = GetBarLength();
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// calculate percentage of progress
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double progress_percent = idx_* TOTAL_PERCENTAGE/(n-1);
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// calculate the percentage value of a unit bar
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double percent_per_unit_bar = TOTAL_PERCENTAGE/bar_size;
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// display progress bar
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*out << " " << description << " |";
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for(int bar_length=0;bar_length<=bar_size-1;++bar_length){
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if(bar_length*percent_per_unit_bar<progress_percent){
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*out << unit_bar;
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}
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else{
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*out << unit_space;
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}
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}
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if(idx_ == n-1)
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*out << "|" << std::setw(CHARACTER_WIDTH_PERCENTAGE + 1) << std::setprecision(1) << std::fixed << progress_percent << "%\r" << std::flush << std::endl;
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else *out << "|" << std::setw(CHARACTER_WIDTH_PERCENTAGE + 1) << std::setprecision(1) << std::fixed << progress_percent << "%\r" << std::flush;
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}
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catch(unsigned long e){
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ClearBarField();
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std::cerr << "PROGRESS_BAR_EXCEPTION: _idx (" << e << ") went out of bounds, greater than n (" << n << ")." << std::endl << std::flush;
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}
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} |