SchedulerControl.CustomDrawDayViewTimeRuler Event

Enables the time ruler to be painted manually.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v23.2.dll

NuGet Package: DevExpress.Win.Scheduler

Declaration

C#

public event CustomDrawObjectEventHandler CustomDrawDayViewTimeRuler

VB.NET

Public Event CustomDrawDayViewTimeRuler As CustomDrawObjectEventHandler

Event Data

The CustomDrawDayViewTimeRuler 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 CustomDrawDayViewTimeRuler event fires before a time ruler is painted. The event parameter’s CustomDrawObjectEventArgs.ObjectInfo property provides the information required to paint the ruler. The value of this property should be typecast to the DevExpress.XtraScheduler.Drawing.TimeRulerViewInfo type.

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 time ruler painting.

Note

The CustomDrawDayViewTimeRuler event is raised only for the Day View and its descendants (Work Week View, Full Week View).

Example

This example displays an image within the Time Ruler.

CustomDraw.cs

public static void scheduler_CustomDrawDayViewTimeRuler(object sender, DevExpress.XtraScheduler.CustomDrawObjectEventArgs e)
{
    TimeRulerViewInfo info = e.ObjectInfo as TimeRulerViewInfo;
    // Clear all captions.
    foreach (var item in info.Items)
    {
        ViewInfoTextItem viewInfoText = item as ViewInfoTextItem;
        if (viewInfoText != null)
        {
            viewInfoText.Text = string.Empty;
        }
    }
    // Draw the TimeRuler as usual, but with empty captions.
    e.DrawDefault();
    // Draw the image in the header.
    Image im = Image.FromFile("image.png");
    Rectangle imageBounds = new Rectangle(info.HeaderBounds.X, info.HeaderBounds.Y, im.Width, im.Height);
    e.Cache.DrawImage(im, imageBounds);
    // Cancel default painting procedure.
    e.Handled = true;
}

CustomDraw.vb

Public Shared Sub scheduler_CustomDrawDayViewTimeRuler(ByVal sender As Object, ByVal e As DevExpress.XtraScheduler.CustomDrawObjectEventArgs)
    Dim info As TimeRulerViewInfo = TryCast(e.ObjectInfo, TimeRulerViewInfo)
    ' Clear all captions.
    Dim item As Object
    For Each item In info.Items
        Dim viewInfoText As ViewInfoTextItem = TryCast(item, ViewInfoTextItem)
        If viewInfoText IsNot Nothing Then
            viewInfoText.Text = String.Empty
        End If
    Next item
    ' Draw the TimeRuler as usual, but with empty captions.
    e.DrawDefault()
    ' Draw the image in the header.
    Dim im As Image = Image.FromFile("image.png")
    Dim imageBounds As New Rectangle(info.HeaderBounds.X, info.HeaderBounds.Y, im.Width, im.Height)
    e.Cache.DrawImage(im, imageBounds)
    ' Cancel default painting procedure.
    e.Handled = True
End Sub