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pictureurl.cpp
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pictureurl.cpp
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#include "pictureurl.h"
PictureURL::PictureURL(QObject *parent) : QObject(parent),
picture1(PictureEnumeration::NULL_PICTURE), picture2(PictureEnumeration::NULL_PICTURE)
{
qsrand(QDateTime::currentMSecsSinceEpoch());
}
//returns a the URL of a randomly selected picture
QString PictureURL::select_picture_URL()
{
PictureEnumeration pictureNumber = Select_enum_for_picture();
Set_Picture_Order(pictureNumber);
return Find_URL(pictureNumber);
}
bool PictureURL::is_same_pictures()
{
return (picture1 == picture2) ? true : false;
}
//================================== //
//======== HELPER FUNCTIONS ======== //
//================================== //
//Creates a random number that will later be used to identify a picture
PictureEnumeration PictureURL::Select_enum_for_picture()
{
return static_cast<PictureEnumeration>(qrand()%total_number_of_image);
}
//URL of pictures are associated with a numbers. Returns the associated URL
QString PictureURL::Find_URL(PictureEnumeration pictureNumber)
{
QString url;
switch(pictureNumber)
{
case PictureEnumeration::Picture0 :
url = "///beautifulSunset.jpeg";
break;
case PictureEnumeration::Picture1:
url = "///beautifulEvening.jpeg";
break;
case PictureEnumeration::Picture2:
url = "///beautifulIsland.jpeg";
break;
default:
throw QException::exception();
}
return url;
}
void PictureURL::Set_Picture_Order(PictureEnumeration pictureNumber)
{
if (picture1 == PictureEnumeration::NULL_PICTURE) { picture1 = pictureNumber; }
else if (picture2 == PictureEnumeration::NULL_PICTURE) {picture2 = pictureNumber; }
// since both picture1 and picture2 have values, there are already two pictures.
// Thus, we set picture1's enum to be equal to picture2's enum and picture2's enum to the enum associated with the new picture2, which is passed in as pictureNumber
else
{
picture1 = picture2;
picture2 = pictureNumber;
}
}