HorizontalDateHeaders.CustomDrawDayHeader Event
Enables day headers to be painted in a custom manner.
Namespace: DevExpress.XtraScheduler.Reporting
Assembly: DevExpress.XtraScheduler.v19.2.Reporting.dll
Declaration
Event Data
The CustomDrawDayHeader 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. |
Remarks
The CustomDrawDayHeader event is raised before a DayHeader is printed. The event parameter’s CustomDrawObjectEventArgs.ObjectInfo property provides the information on an object being painted. The return value of this property should be typecast to the DayHeader type.
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.
Set the CustomDrawObjectEventArgs.Handled property to true to prohibit default appointment painting. Call the CustomDrawObjectEventArgs.DrawDefault method to perform the default drawing procedure if necessary.
The following code sample illustrates the use of the CustomDrawDayHeader event to draw a gradient fill using resource colors, and set the header caption font to bold.
This code snippet illustrates how to change the font and color of the HorizontalDateHeaders visual elements in the Scheduler Report. The XtraSchedulerReport.GetResourceColorSchema method is used to get colors used to paint areas which belong to different resources.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/scheduler-reporting-custom-painting-using-customdraw-events-e2758
using DevExpress.XtraScheduler;
using DevExpress.XtraScheduler.Drawing;
using System;
using System.Drawing;
private void horizontalDateHeaders1_CustomDrawDayHeader(object sender, CustomDrawObjectEventArgs e)
{
DayHeader header = (DayHeader)e.ObjectInfo;
SchedulerColorSchema schema = this.GetResourceColorSchema(header.Resource);
header.Appearance.HeaderCaption.BackColor = schema.CellLight;
header.Appearance.HeaderCaption.BackColor2 = schema.Cell;
Color color = schema.CellBorderDark;
header.Appearance.HeaderCaption.ForeColor = TransformColor(color, 0.6);
header.Appearance.HeaderCaption.Font = e.Cache.GetFont(header.Appearance.HeaderCaption.Font, FontStyle.Bold);
e.DrawDefault();
e.Handled = true;
}
private Color TransformColor(Color color, double light)
{
return Color.FromArgb((int)(color.R * light), (int)(color.G * light), (int)(color.B * light));
}
The CustomDrawDayHeader event is analogous to the SchedulerControl.CustomDrawDayHeader event of the Scheduler control.
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the CustomDrawDayHeader event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.