Qt Quick Controls - Calendar Example

The Calendar example displays a Calendar control and an events list for the selected date. It uses a C++ class to fetch the event details from an SQLite database. The example app uses a custom CalendarStyle to highlight the selected date and mark the dates that have events.

The following snippet from main.qml shows how the Calendar control is used in the app:


  Calendar {
      id: calendar
      width: (parent.width > parent.height ? parent.width * 0.6 - parent.spacing : parent.width)
      height: (parent.height > parent.width ? parent.height * 0.6 - parent.spacing : parent.height)
      frameVisible: true
      weekNumbersVisible: true
      selectedDate: new Date(2014, 0, 1)
      focus: true

      style: CalendarStyle {
          dayDelegate: Item {
                   ...
              }
         }
  }

The C++ class, SqlEventModel, inherits SqlQueryModel to create a database with dummy events for certain dates.


  SqlEventModel::SqlEventModel()
  {
      createConnection();
  }

  void SqlEventModel::createConnection()
  {
      QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
      db.setDatabaseName(":memory:");
      if (!db.open()) {
          qFatal("Cannot open database");
          return;
      }

      QSqlQuery query;
      // We store the time as seconds because it's easier to query.
      query.exec("create table Event (name TEXT, startDate DATE, startTime INT, endDate DATE, endTime INT)");
      query.exec("insert into Event values('Grocery shopping', '2014-01-01', 36000, '2014-01-01', 39600)");
      query.exec("insert into Event values('Ice skating', '2014-01-01', 57600, '2014-01-01', 61200)");
      query.exec("insert into Event values('Doctor''s appointment', '2014-01-15', 57600, '2014-01-15', 63000)");
      query.exec("insert into Event values('Conference', '2014-01-24', 32400, '2014-01-28', 61200)");

      return;
  }

In main.qml, the SqlEventModel custom type is used to get the list of events to mark the dates on the calendar.


  SqlEventModel {
      id: eventModel
  }

  Calendar {
      ...
      style: CalendarStyle {
          dayDelegate: Item {
              ...
              Image {
                  visible: eventModel.eventsForDate(styleData.date).length > 0
                  ...
                  source: "qrc:/images/eventindicator.png"
              }
          }
      }
  }

The app uses a Flow type to position the items, and manipulates the items' width and height based on the orientation change on mobile devices.


  Calendar {
      id: calendar
      width: (parent.width > parent.height ? parent.width * 0.6 - parent.spacing : parent.width)
      height: (parent.height > parent.width ? parent.height * 0.6 - parent.spacing : parent.height)
  }

  Rectangle {
      width: (parent.width > parent.height ? parent.width * 0.4 - parent.spacing : parent.width)
      height: (parent.height > parent.width ? parent.height * 0.4 - parent.spacing : parent.height)
      border.color: Qt.darker(color, 1.2)

      ListView {
          ...
      }
  }

Running the Example

To run the example from Qt Creator, open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.

Files:

Images:

calendar/images/eventindicator.png

Contents

Qt Quick Controls - Calendar Example

Running the Example