SchedulerControl.CustomDrawTimeIndicator Event

Enables the Time Indicator to be painted manually.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v23.2.dll

NuGet Package: DevExpress.Win.Scheduler

Declaration

C#

public event CustomDrawObjectEventHandler CustomDrawTimeIndicator

VB.NET

Public Event CustomDrawTimeIndicator As CustomDrawObjectEventHandler

Event Data

The CustomDrawTimeIndicator event's data class is CustomDrawObjectEventArgs. The following properties provide information specific to this event:

Property	Description
Bounds	Returns the bounding rectangle of the drawing area.
Cache	Gets an object which specifies the storage for the pens, fonts and brushes. Use it for custom painting in Scheduler Reports.
Graphics	Gets an object used for painting.
Handled	Gets or sets whether an event was handled. If it was handled, the default actions are not required.
ObjectInfo	Gets information on the painted element.

The event data class exposes the following methods:

Method	Description
DrawDefault()	Renders the element using the default drawing mechanism.
DrawHtml(HtmlTemplate, DxHtmlPainterContext, Action<DxHtmlPainterArgs>)	Paints the required HTML template inside an element that raised this event. The context parameter allows you to assign an object that transfers mouse events to template elements.
DrawHtml(HtmlTemplate, Action<DxHtmlPainterArgs>)	Paints the required HTML template inside an element that raised this event.
GetDisplayValue(String)
GetValue(String)

Remarks

The CustomDrawTimeIndicator event occurs before a Time Indicator is painted. The event parameter’s CustomDrawObjectEventArgs.ObjectInfo property provides information sufficient to paint a time indicator in desired manner.

You can call the CustomDrawObjectEventArgs.DrawDefault method to perform default painting before applying custom draw.

Set the CustomDrawObjectEventArgs.Handled property to true to prohibit default painting.

Example

This example handles the SchedulerControl.CustomDrawTimeIndicator event to display the current time for the Time Indicator.

CustomDraw.cs

private void SchedulerControl1_CustomDrawTimeIndicator(object sender, CustomDrawObjectEventArgs e) {
    TimeIndicatorViewInfo info = e.ObjectInfo as TimeIndicatorViewInfo;
    SchedulerControl scheduler = sender as SchedulerControl;
    e.DrawDefault();
    foreach(var item in info.Items) {
        HorizontalTimeIndicatorCircleItem timeIndicatorItem = item as HorizontalTimeIndicatorCircleItem;
        if(timeIndicatorItem != null) {
            Rectangle boundsText = Rectangle.Empty;
            if(scheduler.ActiveView is DayView) {
                boundsText = Rectangle.Inflate(new Rectangle(item.Bounds.X + 5, item.Bounds.Y-3, scheduler.ActiveView.ViewInfo.Bounds.Width - 5, 10), 0, 5);
                boundsText.Offset(((int)e.Graphics.ClipBounds.Width / 2), -10);
            }
            e.Cache.DrawString(info.Interval.Start.ToString(), scheduler.Appearance.HeaderCaption.GetFont(), textBrush, boundsText,
                scheduler.Appearance.HeaderCaption.GetStringFormat());
            e.Cache.FillRectangle(textBrush, new Rectangle(item.Bounds.X + 5, item.Bounds.Y, scheduler.ActiveView.ViewInfo.Bounds.Width -5, 2));
        }
    }
    e.Handled = true;
}

CustomDraw.vb

Private Sub SchedulerControl1_CustomDrawTimeIndicator(ByVal sender As Object, ByVal e As CustomDrawObjectEventArgs)
    Dim info As TimeIndicatorViewInfo = TryCast(e.ObjectInfo, TimeIndicatorViewInfo)
    Dim scheduler As SchedulerControl = TryCast(sender, SchedulerControl)
    e.DrawDefault()
    For Each item In info.Items
        Dim timeIndicatorItem As HorizontalTimeIndicatorCircleItem = TryCast(item, HorizontalTimeIndicatorCircleItem)
        If timeIndicatorItem IsNot Nothing Then
            Dim boundsText As Rectangle = Rectangle.Empty
            If TypeOf scheduler.ActiveView Is DayView Then
                boundsText = Rectangle.Inflate(New Rectangle(item.Bounds.X + 5, item.Bounds.Y - 3, scheduler.ActiveView.ViewInfo.Bounds.Width - 5, 10), 0, 5)
                boundsText.Offset((CInt(e.Graphics.ClipBounds.Width) \ 2), -10)
            End If

            e.Cache.DrawString(info.Interval.Start.ToString(), scheduler.Appearance.HeaderCaption.GetFont(), textBrush, boundsText, scheduler.Appearance.HeaderCaption.GetStringFormat())
            e.Cache.FillRectangle(textBrush, New Rectangle(item.Bounds.X + 5, item.Bounds.Y, scheduler.ActiveView.ViewInfo.Bounds.Width - 5, 2))
        End If
    Next
    e.Handled = True
End Sub