TimeCellsControlBase.CustomDrawTimeCell Event

Enables time cells to be painted in a custom manner.

Namespace: DevExpress.XtraScheduler.Reporting

Assembly: DevExpress.XtraScheduler.v23.2.Reporting.dll

NuGet Package: DevExpress.Win.SchedulerReporting

Declaration

C#

public event CustomDrawObjectEventHandler CustomDrawTimeCell

VB.NET

Public Event CustomDrawTimeCell As CustomDrawObjectEventHandler

Event Data

The CustomDrawTimeCell 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

Use the CustomDrawTimeCell event to paint time cells in a custom manner. The cell’s bounding rectangle is identified by the CustomDrawObjectEventArgs.Bounds parameter.

If you custom paint a cell via this event , set the CustomDrawObjectEventArgs.Handled parameter to true. This will indicate that the default painting is not required.

Call the CustomDrawObjectEventArgs.DrawDefault method to perform the default drawing procedure when necessary.

Use the CustomDrawObjectEventArgs.ObjectInfo parameter to get information on the cell currently being painted. You should cast the object to an appropriate type - the TimeCell or the ExtendedCell (for DayViewTimeCells.ExtraCells).

Note

Use the CustomDrawObjectEventArgs.Cache property to paint shapes, write a text and insert images. Do not use the CustomDrawObjectEventArgs.Graphics object in Scheduler Reports.

The following example demonstrates the use of a CustomDrawTimeCell event to add shading to the background of DayViewTimeCells.ExtraCells.

C#

using DevExpress.XtraScheduler.Reporting;
using DevExpress.XtraScheduler.Drawing;
// ...
private void dayViewTimeCells1_CustomDrawTimeCell(object sender, CustomDrawObjectEventArgs e)
{
    TimeCell cell = (TimeCell)e.ObjectInfo;
    if(cell is ExtendedCell) {
        SchedulerColorSchema schema = GetResourceColorSchema(cell.Resource);
        cell.Appearance.BackColor = Color.White;
        cell.Appearance.BackColor2 = schema.CellLight;
        e.DrawDefault();
    }
    e.Handled = true;
}

VB.NET

Imports DevExpress.XtraScheduler.Reporting
Imports DevExpress.XtraScheduler.Drawing
' ...
Private Sub dayViewTimeCells1_CustomDrawTimeCell(ByVal sender As Object,  _
        ByVal e As CustomDrawObjectEventArgs) Handles dayViewTimeCells1.CustomDrawTimeCell
    Dim cell As TimeCell = CType(e.ObjectInfo, TimeCell)
    If TypeOf cell Is ExtendedCell Then
        Dim schema As SchedulerColorSchema = GetResourceColorSchema(cell.Resource)
        cell.Appearance.BackColor = Color.White
        cell.Appearance.BackColor2 = schema.CellLight
        e.DrawDefault()
    End If
    e.Handled = True
End Sub

This event is analogous to the SchedulerControl.CustomDrawTimeCell event of the Scheduler control.