Qt creator ui not updating
Since the custom widget code does not need to be built or combined with the plugin code, very little extra work is required in order to make custom widgets work with Qt Designer.
widget is a version of the Analog Clock example supplied with Qt 4 and Py Qt4 which provides a property to allow the clock to show the time in different time zones, a slot to enable the time zone to be changed in response to signals from other components, and two signals of its own to report changes to the time and time zone.
It's free, well documented it was suggested we present detailed instructions showing how to configure Qt Creator for a common embedded board.
That was an excellent suggestion, so here they are.
One of the elements in the design is a (title) text showing the current folder size, giving the user the visual feedback how big the recording is and that it is still ongoing (size is growing over time).
For that we want to regularly check the size of the folder in a separate thread and update the text in rqt (GUI) accordingly.
signal and update the widget if the new value is different to the old one.
It is a popular and low-cost board that can be used for embedded applications.
In C , developers have to create an additional plugin class, based on QDesigner Custom Widget Interface, that informs Qt Designer about the custom widget's name and which is used to create instances of it for use in forms created by the user.
The custom widget and the plugin class are then compiled together to create a plugin that Qt Designer can load.
In many respects, it separates the design of an application from its function, leaving designers in control of its look and feel and basic usability while developers write the underlying application logic.
Most of the standard Qt widgets are available to users of Qt Designer, and these can be used to create arbitrarily complex user interfaces.