MODEL class

Model class is a class that helps in populating the views ( manage pages , offline pages) of the app .

Model class is inspired from QAbstractitem Model subclass

Refer : http://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html

It's functions are as follows :

  • Adding saved page lists to manage page / offline pages view

  • Removing the page lists from manage page / offline page view

  • Updating both views whenever there is change in the views

Functions available in model class


    void addpages(const list &list)

    Q_INVOKABLE void deletepages(int row);

    Q_INVOKABLE void deletelist();

    Q_INVOKABLE void new_page(QString current_title);

    Q_INVOKABLE void update(QString pageid, int row);

void listmodel::addpages(const list &list)

The addpages function does what it sounds like . It add the pages to the app ( populate the view) at runtime . It is called by main.cpp .

main.cpp sends the page_title and page_id as a list type .

void listmodel::deletepages(int row)

The deletepages function deletes the page from the view when a user clicks on delete button . It works by taking the row of the page from list .

for example : i have 3 pages namely page1 , page2 and page3 and have index as 0 , 1 , 2 respectively . When user clicks on delete button the row(index) of page is sent to the function and remove it from the list .

void listmodel::deletelist()

This function is called when user wants to delete all the available pages in the list . This function is pretty straight-forward . It works as follows

  • count the size of list

  • sends the index of pages to deletepages() function

  • deletepages() removes the pages as explained above.

void listmodel::new_page(QString current_title)

new_page functions adds the new page to the list . It gets the title of the page from main.qml and make a database query . It looks for page_id of the page and sends both pate_title and page_id to the addpages function .

void listmodel::update(QString pageid , int row)

Update function does what it sounds like , whenever a user clicks on update button it will check for update online and if there is update it will update the list .

This function is never called alone . It needs dbmanager's update() to work properly .