Iam using Carousel view control available in Xamarin form(Version 5).
In my case i used Listviews inside carousel view. It works fine if scroll by swiping to left or right, but if i programmatically set the ScrollTo or Position property for the carousel view using button click then it is scrolling multiple times though i'm setting single incremental value.
I added SnapPointsType="MandatorySingle" as mentioned here
One more issue is if my current carousel position is zero and moving to last position or more then one is not working.
<AbsoluteLayout Margin="2" BackgroundColor="Transparent">
<CarouselView
x:Name="MyCarousalView"
AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All"
Scrolled="CarouselViewScrolled">
<CarouselView.ItemsLayout>
<LinearItemsLayout Orientation="Horizontal" ItemSpacing="0" SnapPointsType="MandatorySingle" />
</CarouselView.ItemsLayout>
<CarouselView.ItemTemplate>
<DataTemplate>
<ListView
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
ItemsSource="{Binding .}"
x:FieldModifier="public">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell Tapped="ViewCellTapped">
<StackLayout Padding="0">
<StackLayout Padding="20,1" VerticalOptions="StartAndExpand" Spacing="0" >
<Label
FontSize="16"
Text="{Binding Description}"
FontAttributes="Bold"/>
<Label
FontSize="14"
Text="{Binding CreatedDate}" />
</StackLayout>
<Label HorizontalOptions="FillAndExpand" Padding="0" HeightRequest="1" BackgroundColor="#D4D4D4"/>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</DataTemplate>
</CarouselView.ItemTemplate>
</CarouselView>
</AbsoluteLayout>
Next button click event
private void NextClicked(object sender, EventArgs e)
{
MyCarousalView.ScrollTo((MyCarousalView.Position + 1) < _weekDaysList.Count ? MyCarousalView.Position + 1 : 0);
}
Carousel view binding:
List<List<Note>> _myList;
_myList=getData(); //based on service response
MyCarousalView.ItemsSource = null;
MyCarousalView.ItemsSource = _myList;
Screen recording with issue image
Screen video
Please letme know if any solution/workaround. Thanks
Related
I have a slight problem with XamarinForms, which I am fairly new with.
I do have a grid with several Items in it (ListView, Label, Stacklayout, Listview).
I thought setting RowDefinitions = "Auto" for each row, would make the whole Page scrollable.
But instead I have a scrollbar on each individual listView.
I have added a snippet of my code with one of the listViews inside.
How do I get the listViews shown in their full size and the scrollbar be for the whole page?
I have already tried a scrollview instead of the grid, but it did not work.
Picture of Content in Emulator
Picture of Whole Page
Xamarin Forms:
<Grid
Padding="10"
RowDefinitions="Auto,Auto,Auto,Auto"
ColumnDefinitions="*"
>
<Label Padding="20" FontAttributes="Bold" FontSize="40" Text="{Binding DisplayName}" Grid.Row="0"/>
<ListView ItemsSource="{Binding News}"
HasUnevenRows="True"
IsPullToRefreshEnabled="False"
Grid.Row="1">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Padding="10">
<Label Text="{Binding DateTimeString}"/>
<Label Text="{Binding Text}" MaxLines="4"/>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.Header>
<Grid ColumnDefinitions="*,Auto"
Padding="10"
VerticalOptions="Center">
<Label Text="News"
Grid.Column="0"
FontAttributes="Bold"
FontSize="32"/>
<Label Text="mehr Anzeigen"
Grid.Column="1"
HorizontalTextAlignment="End"/>
</Grid>
</ListView.Header>
</ListView>
You can put the items in ScrollView which is capable of scrolling its content.
refer to: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/layouts/scrollview
I am trying to disable scrolling in my collection view. The reason why I want to do that is there is a scroll view already in my XAML code. When I try to scroll all page elements on the page, collection view elements are also scrolled themselves but I don't want that.
<ScrollView>
<StackLayout Padding="20" Spacing="20" >
<Frame CornerRadius="15"
BackgroundColor="#A6EDB3"
VerticalOptions="StartAndExpand"
HeightRequest="200"
IsClippedToBounds="True"
Padding="0" >
<StackLayout Padding="10,5,10,5"
Orientation="Horizontal" >
<Image Source="settingsIcon"
HeightRequest="25"
WidthRequest="25"
Aspect="Fill" />
<Label Text="Filter"
FontSize="Medium"
VerticalTextAlignment="Center"
VerticalOptions="Center"/>
</StackLayout>
</Frame>
<Label Text="Vocabulary topics" TextColor="black" FontSize="20" FontAttributes="Bold" ></Label>
<CollectionView x:Name="topics" Scrolled="topics_Scrolled" VerticalScrollBarVisibility="Never" >
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout Padding="0,10,0,10">
<Frame HasShadow="False"
HeightRequest="60"
CornerRadius="15"
BackgroundColor="{Binding BackgroundColor}"
HorizontalOptions="Fill" >
<StackLayout Orientation="Horizontal">
<Frame BackgroundColor="{Binding BoxColor}" WidthRequest="40" ></Frame>
<StackLayout>
<Label Text="{Binding Name}"></Label>
</StackLayout>
</StackLayout>
</Frame>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</StackLayout>
</ScrollView>
Having two scrolls on the same page is not the correct way.
Also if you just want to place items above/below your collectionView use the Header/Footer properties then!!
For instance, for the current design, your CollectionView could look something like below and work as you want it to.
<CollectionView Padding="20" x:Name="topics" Scrolled="topics_Scrolled" VerticalScrollBarVisibility="Never" >
<CollectionView.Header>
<StackLayout Spacing="20" >
<Frame CornerRadius="15"
BackgroundColor="#A6EDB3"
VerticalOptions="StartAndExpand"
HeightRequest="200"
IsClippedToBounds="True"
Padding="0" >
<StackLayout Padding="10,5,10,5"
Orientation="Horizontal" >
<Image Source="settingsIcon"
HeightRequest="25"
WidthRequest="25"
Aspect="Fill" />
<Label Text="Filter"
FontSize="Medium"
VerticalTextAlignment="Center"
VerticalOptions="Center"/>
</StackLayout>
</Frame>
<Label Text="Vocabulary topics" TextColor="black" FontSize="20" FontAttributes="Bold" ></Label>
</StackLayout>
</CollectionView.Header>
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout Padding="0,10,0,10">
<Frame HasShadow="False"
HeightRequest="60"
CornerRadius="15"
BackgroundColor="{Binding BackgroundColor}"
HorizontalOptions="Fill" >
<StackLayout Orientation="Horizontal">
<Frame BackgroundColor="{Binding BoxColor}" WidthRequest="40" ></Frame>
<StackLayout>
<Label Text="{Binding Name}"></Label>
</StackLayout>
</StackLayout>
</Frame>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
Note: you might have to adjust the margin and padding properties for it to look the exact same. My code is just an example.
For more information on CollectionView check: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/collectionview/
You can use InputTransparent.
In your case what I would do would be to wrap the CollectionView in a <ContentView> as:
<ContentView InputTransparent="True"
x:Name="content">
<CollectionView ItemsSource="{Binding Items}"...>
...
</CollectionView>
</ContentView>
Create a scroll event to your scroll view:
<ScrollView Scrolled="ScrollView_Scrolled">
...
</ScrollView>
Then, with this event, make sure that the InputTransparent switches depending on the scroll position:
private void ScrollView_Scrolled(object sender, ScrolledEventArgs e)
{
var scrollView = sender as ScrollView;
// Get the height of your scroll view
var contentSize = scrollView.ContentSize.Height;
// Get the max position of the scrollview
var maxPos = contentSize - scrollView.Height;
// Compare it to the current position
if (Convert.ToInt16(e.ScrollY) >= Convert.ToInt16(maxPos))
{
// Switch input transparent value
content.InputTransparent = false;
}
else if (Convert.ToInt16(e.ScrollY) == 0)
{
content.InputTransparent = true;
}
}
This is perfectly fine to use two scrollable controls on the same page for what you want to do. And I don't think <CollectionView.Header> would give you the result you want.
I hope it was helpful! 🙂
I have a List view with fixed Row Height. Inside List view there is Label with large description. I am trying to make this label scroll able. Can anyone help please.
<ListView ItemsSource="{Binding ServiceList, Mode=TwoWay}" RowHeight="100">
<ListView.ItemTemplate>
<DataTemplate x:DataType="models:ServiceModel">
<ViewCell>
<ScrollView
Margin="0"
Padding="0"
HeightRequest="50">
<Label
LineBreakMode="WordWrap"
Style="{StaticResource blackColorLabel}"
Text="{Binding ServiceDescription}" />
</ScrollView>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
As mentioned in the comments, you shouldn't nest scrollviews because the behavior is erratic. You can use BindableLayout though.
<StackLayout BindableLayout.ItemsSource="{Binding ServiceList}">
<BindableLayout.ItemTemplate>
<DataTemplate x:DataType="models:ServiceModel">
<ScrollView
Margin="0"
Padding="0"
HeightRequest="50">
<Label
LineBreakMode="WordWrap"
Style="{StaticResource blackColorLabel}"
Text="{Binding ServiceDescription}" />
</ScrollView>
</DataTemplate>
</BindableLayout.ItemTemplate>
RowHeight is not a thing for BindableLayouts, but you could probably wrap your Label in a ContentView and set the HeightReqeust of the ContentView to 100. Or maybe even just set your Label Height Request to 100 and see what that does.
I'm making a simple listview and got a problem with iOS header - I want to make it transparent, but the problem is, that listview items are sliding under heading. What I want to achieve, is that heading will slide up with listview items.
This is how it looks now
And this is how current code looks like:
<ListView x:Name="SingleBeanView"
ItemsSource="{Binding Beans}"
IsGroupingEnabled="true"
Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"
BackgroundColor="Transparent">
<ListView.GroupHeaderTemplate>
<DataTemplate>
<ViewCell ios:Cell.DefaultBackgroundColor="Transparent" Height="52">
<Label Text="{Binding Heading}" TextColor="{StaticResource LightTextColor}" FontSize="Large" HorizontalOptions="Start" VerticalOptions="Start" Margin="15,10,0,0"/>
</ViewCell>
</DataTemplate>
</ListView.GroupHeaderTemplate>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout BackgroundColor="Transparent" Orientation="Vertical">
<StackLayout Orientation="Horizontal">
<Label Text="{Binding Field1}"/>
<Label Text="{Binding Field2}"/>
<Label Text="{Binding Field3}"/>
</StackLayout>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
Unfortunately , if using GroupHeader in ListView , this can not achieve your want.This effect is designed by Apple . If want to modify ,this need more things and time to do about customing listview.
Here is a solution for native ios, you can have a try with custom renderer to do.However, after testing this can not work in Xamarin.
So the last way maybe need custom cell to realize it--Puttinng header in Cell . Then That means you can not use GroupHeaderTemplate.
Another discussion.
I just can't understand why the background for my side menu on xamarin forms won't render the same on my xamarin.ios. Yet in other parts of the project my list views render and look the same when I use transparent backgrounds, I even tried copying and pasting the xaml code from other parts of the project where it does render the same, but still it does not work. In case anyone's wondering the side menu on ios was requested by the client.
Attached below I have 2 images showing how the side menu renders differently on the 2 platforms
Here's the Xaml code I'm using for my Side Menu:
<MasterDetailPage.Master>
<StackLayout Orientation="Vertical" BackgroundColor="Transparent" Spacing="0">
<StackLayout
HorizontalOptions="Fill"
Orientation="Horizontal"
VerticalOptions="Fill" BackgroundColor="Black" Padding="50, 50, 50, 50">
<StackLayout HorizontalOptions="Center" Orientation="Vertical">
<ffimageloading:CachedImage x:Name="ProfilePictureCircleImage"
LoadingPlaceholder="profile_image_placeholder.png"
ErrorPlaceholder="profile_image_placeholder.png"
DownsampleToViewSize="true"
FadeAnimationEnabled="true"
HeightRequest="65"
WidthRequest="65">
<ffimageloading:CachedImage.Transformations>
<fftransformations:CircleTransformation/>
</ffimageloading:CachedImage.Transformations>
</ffimageloading:CachedImage>
</StackLayout>
<StackLayout
HorizontalOptions="CenterAndExpand"
Orientation="Vertical"
VerticalOptions="CenterAndExpand">
<Label
x:Name="FullNameLabel"
FontSize="18"
HorizontalOptions="Center"
TextColor="White"
VerticalOptions="CenterAndExpand" />
</StackLayout>
</StackLayout>
<BoxView HeightRequest="2" BackgroundColor="#D90B31"/>
<ListView
x:Name="NavigationMenuItems"
ItemSelected="OnMenuItemSelected"
BackgroundColor="{StaticResource TileColour}"
RowHeight="60"
SeparatorVisibility="None"
SeparatorColor="Transparent">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<!-- Main design for menu items -->
<StackLayout
Padding="20,10,0,10"
Orientation="Horizontal"
Spacing="20"
VerticalOptions="FillAndExpand"
BackgroundColor="Transparent">
<local:TintedCachedImage TintColor="{StaticResource SideMenuIconColor}"
Source="{Binding Icon}"
VerticalOptions="Center"
DownsampleToViewSize="true"
HeightRequest="19"
WidthRequest="19"/>
<Label
FontSize="15"
Text="{Binding Title}"
TextColor="{StaticResource SideMenuTextColor}"
VerticalOptions="Center" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage>
</MasterDetailPage.Master>
<MasterDetailPage.Detail>
<NavigationPage />
</MasterDetailPage.Detail>
above are pictures illustrating how it looks across the 2 platforms.
Found the solution to this question on another stackoverflow thread I had to use a custom renderer:
public class CustomSideMenuRenderer: TabletMasterDetailRenderer
{
public override void ViewWillLayoutSubviews()
{
base.ViewWillLayoutSubviews();
var master = ViewControllers[0];
master.View.BackgroundColor = UIColor.Clear;
var detail = ViewController.ChildViewControllers[1];
}
}