The behaviour I'm seeing is that it doesn't hide the multi-day view appointments and then doesn't correctly draw the day view ones. Please see the screen shot attached.
I've attached a handler to the ViewChanged event of the Calendar component.
The event fires on Android but not on UWP. I've tried changing the view type using the calendar controls and also programatically but the event is not being fired.
set the MultiDayViewStyle (tried both in code and also in the xaml) and the Appointment settings don't seem to have any effect on Android.
The following properties are not applied to the DayViewStyle/MultiDayViewStyle- AppointmentFontSize
- AppointmentDetailsFontSize
- AppointmentTextColor
- AppointmentDetailsTextColor
If you set SelectedDate when the Calendar control is created, does not take any effect in the UI on iOS.
As a workaround, set SelectedDate at a later stage.
Hi,
I have been using Telerik controls for the last 4 years in WPF. One of the controls widely used is the RadScheduleView in which I manage customer appointments in hair dresser salons. Recently I tried to implement the same functionality on Mobile Apps using Xamarin.
Some of the appointments generated by users contain overlapping times since they are serviced by different employees. This functionality in WPF is managed perfectly using RadScheduleView. Now I am using the same data by downloading it into a MobileApp (for now Android App) and reproducing similar appointments but on RadCalendar. Every time an appointment have overlaps, the way system is recreating it on the calendar is misleading and sometimes appointments are also hidden.
The following is a Code snippet that also produce the same results.
Steps to reproduce:
1. Appointment View module that inherits from Telerik.XamarinForms.Input.Appointment and add additional properties to manage appointments:
public class AppointmentViewModel : Telerik.XamarinForms.Input.Appointment
{
public Int32 PK { get; set; } = -1;
public String DisplayStartTime
{
get
{
return StartDate.ToString("HH:mm");
}
}
public String DisplayEndTime
{
get
{
return EndDate.ToString("HH:mm");
}
}
public double AppointmentDate
{
get
{
return StartDate.Date.ToOADate();
}
}
public string AppointmentDisplayDate
{
get
{
return StartDate.Date.ToString("ddd dd MMM");
}
}
}Note: To render appointments, I am still using default properties of the class Telerik.XamarinForms.Input.Appointment, see point 3.
2. Create Page (XAML) with calendar and a refresh button:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:telerikPrimitives="clr-namespace:Telerik.XamarinForms.Primitives;assembly=Telerik.XamarinForms.Primitives"
xmlns:zxing="clr-namespace:ZXing.Net.Mobile.Forms;assembly=ZXing.Net.Mobile.Forms"
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"
xmlns:telerikGrid="clr-namespace:Telerik.XamarinForms.DataGrid;assembly=Telerik.XamarinForms.DataGrid"
xmlns:helper="clr-namespace:ProductManager.Helper_Code"
xmlns:telerikDataControls="clr-namespace:Telerik.XamarinForms.DataControls;assembly=Telerik.XamarinForms.DataControls"
xmlns:telerikListView="clr-namespace:Telerik.XamarinForms.DataControls.ListView;assembly=Telerik.XamarinForms.DataControls"
x:Class="ProductManager.Pages.pgAppointments" Appearing="ContentPage_Appearing" Disappearing="ContentPage_Disappearing" >
<ContentPage.Content>
<Gride HorizontalOptions="Fill" VerticalOptions="Fill" Margin="0,0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<telerikInput:RadCalendar x:Name="cntAppoints"
Grid.Row="0"
VerticalOptions="Fill" HorizontalOptions="Fill"
GridLinesDisplayMode="Show"
ViewMode="Day"
DisplayDateChanged="CntAppoints_DisplayDateChanged"
SelectionMode="Single" SelectionChanged="CntAppoints_SelectionChanged"
NativeControlLoaded="CntAppoints_NativeControlLoaded"
TimeSlotTapped="CntAppoints_TimeSlotTapped"
ViewChanged="CntAppoints_ViewChanged" CellTapped="CntAppoints_CellTapped"
SchedulingUiEnabled="True" AppointmentTapped="CntAppoints_AppointmentTapped" >
<telerikInput:RadCalendar.DayViewSettings>
<telerikInput:DayViewSettings DayStartTime="00:00:00"
DayEndTime="23:40:00"
TimelineInterval="15" />
</telerikInput:RadCalendar.DayViewSettings>
<telerikInput:RadCalendar.DayViewStyle>
<telerikInput:DayViewStyle
AllDayAppointmentFontSize="10"
TimelineLabelsTextColor="DarkGray"
TimelineLabelsFontSize="10"
AppointmentFontSize="10"
AppointmentDetailsFontSize="8"/>
</telerikInput:RadCalendar.DayViewStyle>
<telerikInput:RadCalendar.MultiDayViewSettings>
<telerikInput:MultiDayViewSettings DayStartTime="00:00:00"
DayEndTime="23:40:00"
TimelineInterval="15" />
</telerikInput:RadCalendar.MultiDayViewSettings>
<telerikInput:RadCalendar.MultiDayViewStyle>
<telerikInput:MultiDayViewStyle
AllDayAppointmentFontSize="10"
TimelineLabelsTextColor="DarkGray"
TimelineLabelsFontSize="10"
AppointmentFontSize="10"
AppointmentDetailsFontSize="8"/>
</telerikInput:RadCalendar.MultiDayViewStyle>
</telerikInput:RadCalendar>
<telerikInput:RadButton x:Name="btnRefresh"
Clicked="BtnRefresh_Clicked" HorizontalContentAlignment="End" VerticalContentAlignment="Center"
HorizontalOptions="Center" VerticalOptions="Center"
BackgroundColor="Transparent"
Grid.Row="1" Text="Refresh" />
</Grid>
</ContentPage.Content>
</ContentPage>
3. Code Behind the Refresh Button :
private void BtnRefresh_Clicked(object sender, EventArgs e)
{
cntAppoints.DisplayDate = DateTime.Parse("11/05/2019");
ObservableCollection<AppointmentViewModel> apps = new ObservableCollection<AppointmentViewModel>() {
new AppointmentViewModel()
{
PK =1,
Title="Customer 1",
StartDate=DateTime.Parse("2019-05-11T08:00:00"),
EndDate=DateTime.Parse("2019-05-11T08:45:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =2,
Title="Customer 2",
StartDate=DateTime.Parse("2019-05-11T08:00:00"),
EndDate=DateTime.Parse("2019-05-11T18:00:00"),
Detail="Station: STATION 3",
IsAllDay=true
},
new AppointmentViewModel()
{
PK =3,
Title="Customer 3",
StartDate=DateTime.Parse("2019-05-11T08:00:00"),
EndDate=DateTime.Parse("2019-05-11T08:30:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =4,
Title="Customer 4",
StartDate=DateTime.Parse("2019-05-11T08:30:00"),
EndDate=DateTime.Parse("2019-05-11T08:45:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =5,
Title="Customer 5",
StartDate=DateTime.Parse("2019-05-11T09:00:00"),
EndDate=DateTime.Parse("2019-05-11T09:30:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =6,
Title="Customer 6",
StartDate=DateTime.Parse("2019-05-11T09:00:00"),
EndDate=DateTime.Parse("2019-05-11T09:15:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =7,
Title="Customer 7",
StartDate=DateTime.Parse("2019-05-11T09:15:00"),
EndDate=DateTime.Parse("2019-05-11T10:00:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =8,
Title="Customer 8",
StartDate=DateTime.Parse("2019-05-11T09:30:00"),
EndDate=DateTime.Parse("2019-05-11T09:45:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =9,
Title="Customer 9",
StartDate=DateTime.Parse("2019-05-11T09:45:00"),
EndDate=DateTime.Parse("2019-05-11T10:30:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =10,
Title="Customer 10",
StartDate=DateTime.Parse("2019-05-11T10:00:00"),
EndDate=DateTime.Parse("2019-05-11T10:30:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =11,
Title="Customer 11",
StartDate=DateTime.Parse("2019-05-11T11:30:00"),
EndDate=DateTime.Parse("2019-05-11T12:15:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =12,
Title="Customer 12",
StartDate=DateTime.Parse("2019-05-11T12:00:00"),
EndDate=DateTime.Parse("2019-05-11T12:45:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =13,
Title="Customer 13",
StartDate=DateTime.Parse("2019-05-11T12:30:00"),
EndDate=DateTime.Parse("2019-05-11T13:15:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =14,
Title="Customer 14",
StartDate=DateTime.Parse("2019-05-11T12:30:00"),
EndDate=DateTime.Parse("2019-05-11T13:00:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =15,
Title="Customer 15",
StartDate=DateTime.Parse("2019-05-11T13:00:00"),
EndDate=DateTime.Parse("2019-05-11T13:15:00"),
Detail="Station: STATION 2"
},
new AppointmentViewModel()
{
PK =16,
Title="Customer 16",
StartDate=DateTime.Parse("2019-05-11T13:15:00"),
EndDate=DateTime.Parse("2019-05-11T13:30:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =17,
Title="Customer 17",
StartDate=DateTime.Parse("2019-05-11T13:15:00"),
EndDate=DateTime.Parse("2019-05-11T13:30:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =18,
Title="Customer 18",
StartDate=DateTime.Parse("2019-05-11T13:30:00"),
EndDate=DateTime.Parse("2019-05-11T14:00:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =19,
Title="Customer 19",
StartDate=DateTime.Parse("2019-05-11T13:30:00"),
EndDate=DateTime.Parse("2019-05-11T14:00:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =20,
Title="Customer 20",
StartDate=DateTime.Parse("2019-05-11T14:00:00"),
EndDate=DateTime.Parse("2019-05-11T14:30:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =21,
Title="Customer 21",
StartDate=DateTime.Parse("2019-05-11T14:30:00"),
EndDate=DateTime.Parse("2019-05-11T15:00:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =22,
Title="Customer 22",
StartDate=DateTime.Parse("2019-05-11T14:30:00"),
EndDate=DateTime.Parse("2019-05-11T15:00:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =23,
Title="Customer 23",
StartDate=DateTime.Parse("2019-05-11T15:00:00"),
EndDate=DateTime.Parse("2019-05-11T15:30:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =24,
Title="Customer 24",
StartDate=DateTime.Parse("2019-05-11T15:00:00"),
EndDate=DateTime.Parse("2019-05-11T15:45:00"),
Detail="Station: Station 1nServices: head massage and shampoo, short to medium blowdry"
},
new AppointmentViewModel()
{
PK =25,
Title="Customer 25",
StartDate=DateTime.Parse("2019-05-11T15:15:00"),
EndDate=DateTime.Parse("2019-05-11T15:30:00"),
Detail="Station: STATION 2"
},
new AppointmentViewModel()
{
PK =26,
Title="Customer 26",
StartDate=DateTime.Parse("2019-05-11T15:30:00"),
EndDate=DateTime.Parse("2019-05-11T16:00:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =27,
Title="Customer 27",
StartDate=DateTime.Parse("2019-05-11T15:45:00"),
EndDate=DateTime.Parse("2019-05-11T16:15:00"),
Detail="Station: STATION 2"
},
new AppointmentViewModel()
{
PK =28,
Title="Customer 28",
StartDate=DateTime.Parse("2019-05-11T16:00:00"),
EndDate=DateTime.Parse("2019-05-11T16:30:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =29,
Title="Customer 29",
StartDate=DateTime.Parse("2019-05-11T16:30:00"),
EndDate=DateTime.Parse("2019-05-11T16:45:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =30,
Title="Customer 30",
StartDate=DateTime.Parse("2019-05-11T16:45:00"),
EndDate=DateTime.Parse("2019-05-11T17:15:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =31,
Title="Customer 31",
StartDate=DateTime.Parse("2019-05-11T17:00:00"),
EndDate=DateTime.Parse("2019-05-11T17:30:00"),
Detail="Station: STATION 4"
},
new AppointmentViewModel()
{
PK =32,
Title="Customer 32",
StartDate=DateTime.Parse("2019-05-11T17:15:00"),
EndDate=DateTime.Parse("2019-05-11T17:45:00"),
Detail="Station: Station 1"
},
new AppointmentViewModel()
{
PK =33,
Title="Customer 33",
StartDate=DateTime.Parse("2019-05-11T17:15:00"),
EndDate=DateTime.Parse("2019-05-11T17:45:00"),
Detail="Station: STATION 4"
}
};
cntAppoints.AppointmentsSource = null;
cntAppoints.AppointmentsSource = apps;
//GetData(cntAppoints.DisplayDate);
//expFilters.IsExpanded = false;
}
4. After running the above code, the following issues are encountered when appointments are generated on the calendar (screens taken from original application):
- Customer_8.jpg - Appointment for Customer 8 is overlapping appointment with customer 7 when on calendar there is enough space in the other columns;
- Customer_14.jpg - Appointment for Customer 14 is overlapping appointment with customer 12. Appointment for Customer 13 is hidden under Customer 14;
- Customers_26_27_28.jpg - Appointments for Customers 26,27,28 are overlapping with appointment for customer 24 when on calendar their is ample space were to generate these appoints.
- Customer_32.jpg - This is the worst scenario. Appointments for Customer 32 and 33 are sharing the same time slot. This appointments overlapping and users can only view appointment 33.
Can you please give me an indication what I am doing wrong in my code or how can avoid such cases. The scenarios indicated above are misleading to the final users. I notised that such tickets for similar issues where raised since 2017 but never finally answered.
When RadCalendar is inside Xamarin Forms Tabbed Page. Switching between tabs triggers Calendar SelectionChanged and the calendar DisplayDate is changed.
Workaround:
the issue could not be reproduced when RadTabView is used and its IsContentPreserved property is set to true.
Region.Op.REPLACE is deprecated and therefore the exception is thrown:
[AndroidRuntime] java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed
[AndroidRuntime] at android.graphics.Canvas.checkValidClipOp(Canvas.java:779)
[AndroidRuntime] at android.graphics.Canvas.clipRect(Canvas.java:826)
[AndroidRuntime] at com.telerik.widget.calendar.CalendarFragment.drawRows(CalendarFragment.java:589)
[AndroidRuntime] at com.telerik.widget.calendar.CalendarFragment.render(CalendarFragment.java:259)
[AndroidRuntime] at com.telerik.widget.calendar.CalendarScrollManager$FragmentHolder$LayerView.onDraw(CalendarScrollManager.java:136)
[AndroidRuntime] at android.view.View.draw(View.java:20207)
The RadCalendar DayView.EventView get stuck in a shifted position. This only occurs on iOS.
Steps to reproduce:
1. Load calendar.
2. Slowly slide the event view (lower portion) either right or left until the time labels (1am, 2am, etc.) are no longer in their starting positions.
3. Without releasing the scroll, tap the button to change the view to Month view mode.
4. Tap the button to change back to Day view mode.
5. Observe that the entire events view is still shifted and will remain so until the RadCalendar control is destroyed and a new one is created.
Attached are pictures showing the correct view and the incorrect view. Also, a sample project is attached that can be used to replicate this issue.
I have attempted to use a custom renderer to manually reset the events view, but nothing seems to work.
SelectionChanged starts calling twice when appointments collection is changed at runtime from within the event.
The problem occurs when I update the Events property on either of the events DisplayDateChanged or SelectionChanged. It seems these events are triggered another time, sometimes, when the AppointmentSource gets refreshed. I say sometimes because you can navigate through the weeks as normal, but as some points you notice something went wrong. Here’s a list of what I have encountered so far :
When sliding through the weeks from the days header, let’s say the selected day is a Monday, the next weeks would have the Monday selected as expected. Then a random week would have an other selected day (Friday). It would happen randomly until some weeks get skipped completely.
When sliding through the weeks from the days header, let’s say the selected day is a Monday, the next weeks would have the Monday selected as expected. If I touch the Friday box, the selected date gets initially updated to Friday and then a random day between Monday and Friday gets selected.
When sliding through the weeks from the days header, the calendar gets stucked on a random week, and sliding forward or backward through the days header just put you back to the same week. In this case the only way to move to the next/previous week is to slide through the time slot.