GanttView.RequestTimescaleRulers Event
Occurs when timescale rulers are visually changed and allows you to edit timescale rulers. This is a routed event.
Namespace: DevExpress.Xpf.Gantt
Assembly: DevExpress.Xpf.Gantt.v20.2.dll
NuGet Packages: DevExpress.WindowsDesktop.Wpf.Gantt, DevExpress.Wpf.Gantt
Declaration
Event Data
The RequestTimescaleRulers event's data class is RequestTimescaleRulersEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Handled | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs. |
NonworkingDayVisibility | Gets or sets the nonworking day visibility at a current zoom level. |
NonworkingTimeVisibility | Gets or sets the nonworking time visibility at a current zoom level. |
OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
RoutedEvent | Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs. |
Source | Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs. |
TimescaleRulers | Get or sets a collection of timescale rulers displayed at the current zoom level. |
Zoom | Gets the current zoom. |
The event data class exposes the following methods:
Method | Description |
---|---|
InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
Remarks
The RequestTimescaleRulers event occurs on init, when the Gantt area is zoomed and when the TimescaleRulerCount property value is changed.
Handle the RequestTimescaleRulers event to dynamically change the following:
- a set of rulers displayed within the timescales (RequestTimescaleRulersEventArgs.TimescaleRulers)
- visibility of nonworking days and nonworking time (RequestTimescaleRulersEventArgs.NonworkingDayVisibility and RequestTimescaleRulersEventArgs.NonworkingTimeVisibility)
private void view_RequestTimescaleRulers(object sender, DevExpress.Xpf.Gantt.RequestTimescaleRulersEventArgs e) {
// Remove a ruler from timescale
e.TimescaleRulers.RemoveAt(2);
// Add a ruler that indicates hours
e.TimescaleRulers.Add(new DevExpress.Xpf.Gantt.TimescaleRuler(DevExpress.Xpf.Gantt.TimescaleUnit.Hour));
// Add a ruler that indicates 30 minute ranges
e.TimescaleRulers.Add(new DevExpress.Xpf.Gantt.TimescaleRuler(DevExpress.Xpf.Gantt.TimescaleUnit.Minute, 30));
// Nonworking dates and nonworking time are not indicated with a specific background
e.NonworkingDayVisibility = Visibility.Hidden;
e.NonworkingTimeVisibility = Visibility.Hidden;
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the RequestTimescaleRulers event.
Note
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