SchedulerControl.CustomDrawDayViewAllDayArea Event

Enables the All-Day Area to be painted manually.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v23.2.dll

NuGet Package: DevExpress.Win.Scheduler

Declaration

C#

public event CustomDrawObjectEventHandler CustomDrawDayViewAllDayArea

VB.NET

Public Event CustomDrawDayViewAllDayArea As CustomDrawObjectEventHandler

Event Data

The CustomDrawDayViewAllDayArea 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 CustomDrawDayViewAllDayArea event fires before an All-Day Area is painted. The event parameter’s CustomDrawObjectEventArgs.ObjectInfo property provides the information required to paint an area. The value of this property should be typecast to the DevExpress.XtraScheduler.Drawing.SelectableIntervalViewInfo type.

Note

The CustomDrawDayViewAllDayArea event fires only for the Day View and Work Week View views.

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

Example

This example demonstrates how to display scheduled time statistics in the All-Day Area. The IntervalLoadRatioCalculator object calculates work time loads.

CustomDraw.cs

private void schedulerControl1_CustomDrawDayViewAllDayArea(object sender, DevExpress.XtraScheduler.CustomDrawObjectEventArgs e)
{
    if (schedulerStorage1.Appointments != null)
    {
        AllDayAreaCell cell = (AllDayAreaCell)e.ObjectInfo;
        Resource resource = cell.Resource;
        TimeInterval interval = cell.Interval;
        AppointmentBaseCollection apts = ((SchedulerControl)sender).Storage.GetAppointments(interval);
        float percent = CalcCurrentWorkTimeLoad(apts, interval, resource);
        Brush brush;
        if (percent == 0.0)
            brush = Brushes.LightYellow;
        else if (percent < 0.5)
            brush = Brushes.LightBlue;
        else brush = Brushes.LightCoral;
        e.Cache.FillRectangle(brush, e.Bounds);
        e.Cache.DrawString(string.Format("{0:P}", percent), cell.Appearance.Font, Brushes.Black, e.Bounds, cell.Appearance.TextOptions.GetStringFormat());
        e.Handled = true;
    }
}
private float CalcCurrentWorkTimeLoad(AppointmentBaseCollection apts, TimeInterval interval, Resource resource)
{
    AppointmentBaseCollection aptsByResource = new AppointmentBaseCollection();
    var aptQuery = apts.Where(a => a.ResourceId.Equals(resource.Id));
    aptsByResource.AddRange(aptQuery.ToList());

    IntervalLoadRatioCalculator calc = new IntervalLoadRatioCalculator(interval, aptsByResource);
    return calc.Calculate();
}

CustomDraw.vb

Private Sub schedulerControl1_CustomDrawDayViewAllDayArea(ByVal sender As Object, ByVal e As DevExpress.XtraScheduler.CustomDrawObjectEventArgs) Handles schedulerControl1.CustomDrawDayViewAllDayArea
    If schedulerStorage1.Appointments IsNot Nothing Then
        Dim cell As AllDayAreaCell = CType(e.ObjectInfo, AllDayAreaCell)
        Dim resource As Resource = cell.Resource
        Dim interval As TimeInterval = cell.Interval

        Dim percent As Single = CalcCurrentWorkTimeLoad(interval, resource)
        Dim brush As Brush
        If percent = 0.0 Then
            brush = Brushes.LightYellow
        ElseIf percent < 0.5 Then
            brush = Brushes.LightBlue
        Else
            brush = Brushes.LightCoral
        End If
        e.Cache.FillRectangle(brush, e.Bounds)
        e.Cache.DrawString(String.Format("{0:P}", percent), cell.Appearance.Font, Brushes.Black, e.Bounds, cell.Appearance.TextOptions.GetStringFormat())
        e.Handled = True
    End If
End Sub

Private Function CalcCurrentWorkTimeLoad(ByVal interval As TimeInterval, ByVal resource As Resource) As Single
    Dim apts As AppointmentBaseCollection = Me.schedulerStorage1.GetAppointments(interval)
    Dim aptsByResource As New AppointmentBaseCollection()
    Dim aptQuery = apts.Where(Function(a) a.ResourceId.Equals(resource.Id))
    aptsByResource.AddRange(aptQuery.ToList())

    Dim calc As New IntervalLoadRatioCalculator(interval, aptsByResource)
    Return calc.Calculate()
End Function