I tried recreating David Orinaus example of a bottom drawer on Xamarin Forms with DotNet Maui.
Implementation of bottom drawer:
<Grid>
<!-- Backdrop -->
<BoxView Color="#4B000000"
Opacity="0"
InputTransparent="True"
x:Name="Backdrop">
<BoxView.GestureRecognizers>
<TapGestureRecognizer
Tapped="TapGestureRecognizer_Tapped"/>
</BoxView.GestureRecognizers>
</BoxView>
<!-- Bottom Drawer -->
<Frame
x:Name="BottomToolbar"
HeightRequest="200"
VerticalOptions="End"
BackgroundColor="#FFFFFF"
CornerRadius="20"
TranslationY="260"
Padding="15,6">
<Frame.GestureRecognizers>
<PanGestureRecognizer
PanUpdated="PanGestureRecognizer_PanUpdated"
/>
</Frame.GestureRecognizers>
<StackLayout Orientation="Vertical" Padding="0,4">
<BoxView CornerRadius="2" HeightRequest="4" WidthRequest="40"
BackgroundColor="LightGray"
HorizontalOptions="Center"/>
<Label Text="Actions"
HorizontalOptions="Center"
FontSize="18"
FontAttributes="Bold"/>
<TableView Intent="Settings"
VerticalOptions="End"
BackgroundColor="White"
>
<TableSection>
<TextCell
Text="Favorite"/>
<TextCell
Text="Share"/>
</TableSection>
</TableView>
</StackLayout>
</Frame>
</Grid>
Most of the code is the same and this is a sample repository: https://github.com/MaticDiba/MauiAppBottomDrawer
But for some reason, the Bottom drawer is always shown when the page is loaded instead of being hidden until called.
Is there any specific with how DotNet Maui is handling frame views? Any suggestion on how to achieve the same effect with DotNet Maui as this example did with Xamarin?
Related
I have the following screen in an Android project:
How can I create controls like this in Xamarin forms? (I really don't want to implement it native).
You could use Frame and set the Padding and CornerRadius .
For example
<StackLayout VerticalOptions="CenterAndExpand" HorizontalOptions="CenterAndExpand">
<Frame BackgroundColor="Red" CornerRadius="10" WidthRequest="100" HeightRequest="50" Padding="5">
<Frame BackgroundColor="White" CornerRadius="8" WidthRequest="90" HeightRequest="40" Padding="5" >
<Frame BackgroundColor="Red" CornerRadius="8" WidthRequest="80" HeightRequest="30" Padding="0">
<Label Text="11111" TextColor="White" FontSize="20" VerticalTextAlignment="Center" HorizontalTextAlignment="Center"/>
</Frame>
</Frame>
</Frame>
</StackLayout>
You could put the above code in a custom view and binding the color and text in code behind.
In Xamarin.Android it has a class named ViewPager to support "Gestural navigation allows the user to swipe left and right to step through pages of data." (https://learn.microsoft.com/en-us/xamarin/android/user-interface/controls/view-pager/)
But my task is write cross-platform codes for both Android & iOS (without rewrite new code for this gesture). With Xamarin.Form does any library support this ? I have read about Xamarin.Form carousel, but it seem used for slideshow, not appropriate for news list.
I think TabbedPage is more suitable for you. tabbedPage support the Gestural navigation allows the user to swipe left and right to step through pages of data, just set the different pages of data in different tabs.
Here is running GIF.
You can add this Tabbedpage like following code.
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TabbedPageDemo;assembly=TabbedPageDemo"
x:Class="TabbedPageDemo.TabbedPageDemoPage">
<TabbedPage.Resources>
<ResourceDictionary>
<local:NonNullToBooleanConverter x:Key="booleanConverter" />
</ResourceDictionary>
</TabbedPage.Resources>
<TabbedPage.ItemTemplate>
<DataTemplate>
<ContentPage Title="{Binding Name}" Icon="monkeyicon.png">
<StackLayout Padding="5, 25">
<Label Text="{Binding Name}"
Font="Bold,Large"
HorizontalOptions="Center" />
<Image Source="{Binding PhotoUrl}"
WidthRequest="200"
HeightRequest="200" />
<StackLayout Padding="50, 10">
<StackLayout Orientation="Horizontal">
<Label Text="Family:"
HorizontalOptions="FillAndExpand" />
<Label Text="{Binding Family}"
Font="Bold,Medium" />
</StackLayout>
<StackLayout Orientation="Horizontal"
IsVisible="{Binding Subfamily,
Converter={StaticResource booleanConverter}}">
<Label Text="Subfamily:"
HorizontalOptions="FillAndExpand" />
<Label Text="{Binding Subfamily}"
Font="Bold,Medium" />
</StackLayout>
<StackLayout Orientation="Horizontal"
IsVisible="{Binding Tribe,
Converter={StaticResource booleanConverter}}">
<Label Text="Tribe:"
HorizontalOptions="FillAndExpand" />
<Label Text="{Binding Tribe}"
Font="Bold,Medium" />
</StackLayout>
<StackLayout Orientation="Horizontal">
<Label Text="Genus:"
HorizontalOptions="FillAndExpand" />
<Label Text="{Binding Genus}"
Font="Bold,Medium" />
</StackLayout>
</StackLayout>
</StackLayout>
</ContentPage>
</DataTemplate>
</TabbedPage.ItemTemplate>
</TabbedPage>
You can add different ItemTemplate in the Tabbedpage.
Here is a related link.
https://learn.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/navigation/tabbed-page
Update: you can add the listview in the tabbpage like following GIF.
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];
}
}
I am looking for a cross platform swipe on ListView to perform an action such as opening a menu or deleting an item.
Has anyone implemented such a scenario? I would like to for instance delete an item when swiping on item to left.
I need to support all platforms: ios/droid/win
The easiest way would be to use the built-in Context Actions, this allows you to show menu items when your list item is swiped on iOS or long pressed on Android
<ListView x:Name="ContextDemoList">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.ContextActions>
<MenuItem Clicked="OnMore" CommandParameter="{Binding .}"
Text="More" />
<MenuItem Clicked="OnDelete" CommandParameter="{Binding .}"
Text="Delete" IsDestructive="True" />
</ViewCell.ContextActions>
<StackLayout Padding="15,0">
<Label Text="{Binding title}" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
https://developer.xamarin.com/guides/xamarin-forms/user-interface/listview/interactivity/#Context_Actions
If swiping is a requirement for both platforms, or you need to do an action when the item is swiped (Instead of showing menu items) then i'd recommend SyncFucion's listview control, it is available with a Community licence and it offers more flexibility
<syncfusion:SfListView x:Name="listView" AllowSwiping="True">
<syncfusion:SfListView.LeftSwipeTemplate>
<DataTemplate x:Name="LeftSwipeTemplate">
<Grid>
<Grid BackgroundColor="#009EDA" HorizontalOptions="Fill" VerticalOptions="Fill" Grid.Column="0">
<Grid VerticalOptions="Center" HorizontalOptions="Center">
<Image Grid.Column="0"
Grid.Row="0"
BackgroundColor="Transparent"
HeightRequest="35"
WidthRequest="35"
Source="Favorites.png" />
</Grid>
</Grid>
</Grid>
</DataTemplate>
</syncfusion:SfListView.LeftSwipeTemplate>
</syncfusion:SfListView>
https://help.syncfusion.com/xamarin/sflistview/swiping
You can use SwipeView and wrap it in a ListView.
<ListView
ItemsSource="{Binding Items}"
SelectionMode="None"
CachingStrategy="RecycleElement"
RowHeight="110"
HeightRequest="1000"
BackgroundColor="White"
IsPullToRefreshEnabled="True"
Refreshing="OnRefresh">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<SwipeView>
<SwipeView.GestureRecognizers>
<TapGestureRecognizer
Tapped="OnTapped"
NumberOfTapsRequired="1" />
</SwipeView.GestureRecognizers>
<SwipeView.RightItems>
<SwipeItems>
<SwipeItem
Text="Edit"
IconImageSource="edit_icon.png"
BackgroundColor="Green"
Invoked="OnEdit" />
<SwipeItem
Text="Delete"
IconImageSource="delete_icon.png"
BackgroundColor="Red"
Invoked="OnDelete" />
</SwipeItems>
</SwipeView.RightItems>
<SwipeView.Content>
:
</SwipeView.Content>
</SwipeView>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
From: https://github.com/xamarin/Xamarin.Forms/issues/9089
I am not sure whether this is my problem or a problem with Xamarin.
On an iPad my application can load the page which contain a list of data in ListView.
The View Cell inside the ListView can be slightly complex. It contains a profile image, some smaller icons using, which are using FFImageLoading.
On iPad, when I tap a cell of the first page to go into the next page, which contains a list of data, it loads very smoothly.
On Android, when I tap on a cell to go into the next page, the detection of the tap is slow and the loading time of the ListView also very slow.
Is there anyway enhance the performance? I thought it was the data I loaded from SQLite. However, after I comment out the ItemsSource on ListView, the loading time is fine.
This is the datatemplate I've used for displaying the cell.
<ViewCell>
<ViewCell.View>
<StackLayout Spacing="0" Padding="0" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
<StackLayout Orientation="Horizontal" Spacing="10" Padding="0" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<StackLayout Orientation="Horizontal" HorizontalOptions="StartAndExpand">
<controls:CircleImage
Style="{StaticResource profileImageStyle}"
Margin="10, 10, 10, 10"
Source="{Binding Source}"
BorderColor="White"
BorderThickness="2"
VerticalOptions="Center"
HorizontalOptions="Center">
<controls:CircleImage.GestureRecognizers>
<TapGestureRecognizer Tapped="OnChildDetailTapped" />
</controls:CircleImage.GestureRecognizers>
</controls:CircleImage>
<StackLayout VerticalOptions="Fill" Spacing="1" Padding="0,20,0,10" HorizontalOptions="StartAndExpand">
<StackLayout.GestureRecognizers>
<TapGestureRecognizer Tapped="OnChildDetailTapped" />
</StackLayout.GestureRecognizers>
<StackLayout
Orientation="Vertical"
VerticalOptions="Center"
HorizontalOptions="StartAndExpand">
<Label x:Name="childName" Text="{Binding DisplayName}" Style="{StaticResource normalFont}"> </Label>
<local:ChildInfoIconsView
Child="{Binding .}"
VerticalOptions="Fill">
</local:ChildInfoIconsView>
<Label
x:Name="childNotes"
Style="{StaticResource footnoteFont}"
Text="{Binding ChildNotes, StringFormat={x:Static local:AppResources.formatNotes}}"
IsVisible="{Binding HasChildNotes}">
</Label>
<Label
x:Name="noPickupReason"
Style="{StaticResource footnoteFont}"
Text="{Binding NoPickupReason, StringFormat={x:Static local:AppResources.formatNoPickupReason}}"
IsVisible="{Binding HasNoPickupReason}">
</Label>
<Label
x:Name="absentReason"
Style="{StaticResource footnoteFont}"
Text="{Binding AbsentReason, StringFormat={x:Static local:AppResources.formatAbsentReason}}"
IsVisible="{Binding HasAbsentReason}">
</Label>
</StackLayout>
</StackLayout>
</StackLayout>
<StackLayout Orientation="Horizontal" VerticalOptions="FillAndExpand" HorizontalOptions="End">
<StackLayout.Padding>
<OnIdiom x:TypeArguments="Thickness">
<OnIdiom.Phone>5, 20, 10, 20</OnIdiom.Phone>
<OnIdiom.Tablet>10, 30, 30, 30</OnIdiom.Tablet>
</OnIdiom>
</StackLayout.Padding>
<Image
Style="{StaticResource listviewButtonStyle}"
IsVisible="{Binding EnabledSigning, Source={x:Reference page}}"
Source="ic_action_yes.png"
VerticalOptions="FillAndExpand"
HorizontalOptions="End">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="OnAttend" />
</Image.GestureRecognizers>
<Image.Margin>
<OnIdiom x:TypeArguments="Thickness">
<OnIdiom.Phone>0, 0, 5, 0</OnIdiom.Phone>
<OnIdiom.Tablet>5, 5, 20, 5</OnIdiom.Tablet>
</OnIdiom>
</Image.Margin>
</Image>
<Image
Style="{StaticResource listviewButtonStyle}"
IsVisible="{Binding EnabledSigning, Source={x:Reference page}}"
Source="ic_action_no.png"
VerticalOptions="FillAndExpand"
HorizontalOptions="End">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="OnAbsent" />
</Image.GestureRecognizers>
<Image.Margin>
<OnIdiom x:TypeArguments="Thickness">
<OnIdiom.Phone>5, 0, 0, 0</OnIdiom.Phone>
<OnIdiom.Tablet>20, 5, 5, 5</OnIdiom.Tablet>
</OnIdiom>
</Image.Margin>
</Image>
</StackLayout>
</StackLayout>
</StackLayout>
</ViewCell.View>
</ViewCell>
Try setting a listview caching strategy to improve performance.
See here for more details
Be aware though that you may need to jump through some hoops to use RecycleElement with FFImageLoading. The issue is described here
Also, please post your data template so we can see if it can be simplified.
Use RecyclerView
https://blog.xamarin.com/recyclerview-highly-optimized-collections-for-android-apps/
OR
Use FFImageLoading
https://github.com/luberda-molinet/FFImageLoading
to optimize and for smoother scroll