End to End GUI Development with Qt5

Adding the Mac OS implementation

Let's take a look at the Mac implementation of the SysInfo class. Start by creating a new C++ class named SysInfoMacImpl that inherits from the SysInfo class. Override SysInfo virtual functions and you should have a SysInfoMacImpl.h file like this:

#include "SysInfo.h" 
 
#include <QtGlobal> 
#include <QVector> 
 
class SysInfoMacImpl : public SysInfo 
{ 
public: 
    SysInfoMacImpl(); 
 
    void init() override; 
    double cpuLoadAverage() override; 
    double memoryUsed() override; 
}; 

The first implementation we will do will be the memoryUsed() function, in the SysInfoMacImpl.cpp file:

#include <mach/vm_statistics.h> #include <mach/mach_types.h> #include <mach/mach_init.h> #include <mach/mach_host.h> #include <mach/vm_map.h> SysInfoMacImpl::SysInfoMacImpl() ...