- Qt 6.10
- Qt Remote Objects
- Qt Remote Objects Examples
- Time Client Application
- Qt 6.10.2 Reference Documentation

# Time Client Application

A client who holds a replica of a time object from a server and displays the time in a clock.

The Time Client Application opens a blue window with a message. When you click once, it displays a clock. When you click again, two clocks, then it repeats. The clock is defined in Clock.qml and uses the `Time` QML-type, implemented in C++, to set the time of the clock using the time on the server.

#### Before Running the Time Client Application

To run this example, Time Server Application must already be running on the same host as this application. It sets up a registry server and hosts an instance of a subclass of the `MinuteTimerSimpleSource` class. If it is not running, there will be an error message in the window.

#### Defining Remote Objects using a REP-file

The REP-file "timemodel.rep" in the parent directory of this application is used to generate the header-files used by both applications. For this application, the generated "rep_timemodel_replica.h" file defines `MinuteTimerReplica`, the replica of `MinuteTimer`, and other related classes.

#### The TimeModel Class

The `TimeModel` class in plugin.h and plugin.cpp implements the QML-type `Time`. It contacts the registry server on localhost using the URL "local:registry", acquires a replica, `MinuteTimerReplica`, and connects to its signals. The properties are automatically updated.

#### The QML Types

The QML defined in "Clock.qml" draws a watch using the properties hours and minutes.

The application opens a window with the contents "plugins.qml". It changes between displaying different content using a Loader, cycling for each click between "plugins0.qml", "plugins1.qml", and "plugins2.qml".

While "plugins0.qml" displays a blue screen with a message, the custom QML-type `Clock` is used in "plugins1.qml", with the properties hours and minutes set to the hour and minute properties of `Time`. The "plugins2.qml" file is similar but displays two clocks.

     import QtRemoteObjects
     import QtQuick
     import TimeExample // import types from the plugin

     Rectangle {
         width: 200
         height: 400
         color: "blue"
         Clock {
             id: clock1
             anchors.top: parent.top

             Time { // this class is defined in C++
                 id: time
                 node: node
             }

             Node {
                 id: node
                 registryUrl: "local:registry"
             }

             hours: time.hour
             minutes: time.minute
             valid: time.state == Time.Valid

         }
     }

Example project @ code.qt.io

See also Time Server Application.