DayViewHeaderItemViewModel Class

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

Namespace: DevExpress.XamarinForms.Scheduler

Assembly: DevExpress.XamarinForms.Scheduler.dll

NuGet Package: DevExpress.XamarinForms.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 DayViewHeaderItemStyle.Customizer‘s Customize(DayViewHeaderItemViewModel) accepts this class’s instance as an argument.

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

Example

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

XAML

<dxs:WorkWeekView.HeaderItemStyle>
    <dxs:DayViewHeaderItemStyle 
        BackgroundColor="Gray" 
        TodayDayNumberBackgroundColor="#FF8000" 
        TextSpacing="16"
        BorderThickness="2"
        BorderColor="#f0f0f0">
        <dxs:DayViewHeaderItemStyle.DayNumberTextStyle>
            <dxs:TextStyle Color="Black"/>
        </dxs:DayViewHeaderItemStyle.DayNumberTextStyle>
        <dxs:DayViewHeaderItemStyle.TodayDayNumberTextStyle>
            <dxs:TextStyle Color="White"/>
        </dxs:DayViewHeaderItemStyle.TodayDayNumberTextStyle>
        <dxs:DayViewHeaderItemStyle.WeekDayTextStyle>
            <dxs:TextStyle Color="Black"/>
        </dxs:DayViewHeaderItemStyle.WeekDayTextStyle>
        <dxs:DayViewHeaderItemStyle.TodayWeekDayTextStyle>
            <dxs:TextStyle Color="#FF8000"/>
        </dxs:DayViewHeaderItemStyle.TodayWeekDayTextStyle>
        <dxs:DayViewHeaderItemStyle.Customizer>
            <views:HeaderItemCustomizer/>
        </dxs:DayViewHeaderItemStyle.Customizer>
    </dxs:DayViewHeaderItemStyle>
</dxs:WorkWeekView.HeaderItemStyle>

C#

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

Symbol	Description
DayViewBase.HeaderItemStyle	Gets or sets appearance settings of header items.
DayViewHeaderItemStyle	The storage for the Day-based View’s date header appearance settings.
DayViewHeaderItemStyle.Customizer	Gets or sets an object that customizes the view models that provide data for headers.
IDayViewHeaderItemCustomizer	The interface that should implement a class that 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.

Implements

INotifyPropertyChanged

INotifyPropertyChanging

Inheritance

Object

DevExpress.XamarinForms.Scheduler.Internal.NotifyPropertyChangedBase

ItemViewModel

HeaderItemViewModel

DayViewHeaderItemViewModel