World Time Clockglobal time clock
This could also be a world chart with integrated analogue or digitial time display. This is a circulating world chart that rotates in a 24-hour clock face. As an alternative, the disk can be fixed and the ring can move. Illuminated projections on a card depicting the time of day in which Geochron is used, a mark of a certain shape of the world clock.
Wristwatches and bag clocks are also available. In the past, timepiece makers mistakenly affixed the world time tag to an instrument that only displays time for two or a few time regions, but the word should only be used for clocks that display time for all the world's important time regions.
Plugin world time clock example
This example just extends the Customizing Plugin example and its Customizing plugin (based on the Analog Clock example) by presenting the concepts of signal and slot. This example of the World Time Clock plugin contains two classes: WordTimeClock is a user-defined clock Widget with hours and minutes hand that is refreshed every few seconds automatic.
First, we take a look at the WorldTimeClock category, which adds a single input and a single slots to the AnalogClock category of the Custom Widget Plugin example. Then, we take a short look at the category WorldTimeClockPlugin, but this category is in most parts the same as the Custom Widget Plugin example.
At the end we have a look at the plug-in's projectfile. QWidget is inherited by the WordTimeClock category and is a user-defined clock Widget with hours and minutes pointers that updates every few seconds. The difference between this example and the Customizing widget plug-in is the insertion of the signals and the slots in the Customizing Widget class:::: );: );: );: );:: ;:: ; }; Please notice the use of the QDESIGNER_WIDGET_EXPORT macros.
Confirm the setTimeZone() socket with an associated time-ZoneOffset tag and confirm an updated() flag that uses the actual time as an argument and is output when the widget is redrawn. You can also link the valueChanged() output of a QSpinBox to the setTimeClock slots of setTimeZone(). It' definitions correspond to the plug-in classes of the Custom Plugin example, which are described in detail.
It also knows how to generate instant copies of the WorldTimeClockPlugin Widgets. Both QObject and QDesignerCustomWidgetInterface are inherited from the WorldTimeClockPlugin family. When using concurrent inheritance, it is important to make sure that all interface (that is, the categories that do not pass on Q_OBJECT) are made known to the subobject system using the smart symbol Q_INTERFACES().
Implementing the WatchClockPlugin also corresponds to implementing the plug-in API in the example of the Customizing widget plug-in (only the classname and the implementations of QDesignerCustomWidgetInterface::domXml() differ). TEMPLATE in combination with the CONFIG tag's keyboard plug-in will allow qmake to build the user-defined Widget as a plug-in libraries.
The plug-in provides a default feature for creating widgets by deploying the generic interface QDesignerCustomWidgetInterface or QDesignerCustomWidgetCollectionInterface, designed for use with QUiLoader. Notice that if you want the plug-ins to appear in a visual studio environment, the plug-ins must be created in released state and their library must be duplicated to the plug-ins folder in the installation location of the environment (see e.g. C: /program files/trolltech ass/visual studio integration/plugins). 4.