DayViewHeaderItemViewModel Class

The storage for appearance settings values of an individual Day View header item’s representation.

Namespace: DevExpress.Maui.Scheduler

Assembly: DevExpress.Maui.Scheduler.dll

NuGet Package: DevExpress.Maui.Scheduler

Declaration

public class DayViewHeaderItemViewModel :
    HeaderItemViewModel

Remarks

The Scheduler View uses this class in the following occurrences:

BindingContext of a data template assigned to the DayViewBase.HeaderItemTemplate property stores this class’s instance.
The DayViewHeaderItemAppearance.Customizer‘s Customize(DayViewHeaderItemViewModel) accepts this class’s instance as an argument.

This view model provides the following settings that you can customize:

All Day Area Cell View Model's Settable Properties

Example

This example uses the day view header item style and its customizer to modify the header’s appearance.

XAML

<dxs:WorkWeekView.HeaderItemAppearance>
    <dxs:DayViewHeaderItemAppearance 
        BackgroundColor="Gray" 
        TodayDayNumberBackgroundColor="#FF8000" 
        TextSpacing="16"
        BorderThickness="2"
        BorderColor="#f0f0f0"
        DayNumberTextColor="Black"
        TodayDayNumberTextColor="White"
        WeekDayTextColor="Black"
        TodayWeekDayTextColor="#FF8000">
        <dxs:DayViewHeaderItemAppearance.Customizer>
            <views:HeaderItemCustomizer/>
        </dxs:DayViewHeaderItemAppearance.Customizer>
    </dxs:DayViewHeaderItemAppearance>
</dxs:WorkWeekView.HeaderItemAppearance>

class HeaderItemCustomizer : IDayViewHeaderItemCustomizer {
    public void Customize(DayViewHeaderItemViewModel header) {
        if (header.IsToday) {
            header.BackgroundColor = header.AlternateBackgroundColor;
            header.AlternateBackgroundColor = Colors.White;
            Color tmp = header.DayNumberTextColor;
            header.DayNumberTextColor = header.WeekDayTextColor;
            header.WeekDayTextColor = tmp;
        }
    }
}

Scheduler - Header Item Appearance

Symbol	Description
DayViewBase.HeaderItemAppearance	Gets or sets appearance settings of header items. This is a bindable property.
DayViewHeaderItemAppearance	The storage for the Day-based View’s date header appearance settings.
DayViewHeaderItemAppearance.Customizer	Gets or sets an object that customizes the view models that provide data for headers. This is a bindable property.
IDayViewHeaderItemCustomizer	If implemented by a class, modifies appearance settings of individual Day View header items.
IDayViewHeaderItemCustomizer.Customize(DayViewHeaderItemViewModel)	Modifies appearance settings of an individual Day View header item.
`DayViewHeaderItemViewModel`	The storage for appearance settings values of an individual Day View header item’s representation.