I'm working on a Xamarin Forms application. Right now I'm trying to implement custom video controls into my MediaElement but I'm failing to do so, and googling isn't helping much.
Basic overview, I have a MediaElement playing a video, and I have two buttons on each side of the video that I would like the user to be able to press and rewind or fast forward 5 seconds. The buttons recognize being clicked, but do not do what I want them to, and I'm not sure what I am doing wrong. Here is my code:
Page.xaml
...
<Grid BackgroundColor="#E5EBEE">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="150"/>
</Grid.ColumnDefinitions>
<MediaElement x:Name="LessonVideo"
Source="ms-appx:///vid_IntroDemo.mp4"
ShowsPlaybackControls="False"
IsLooping="True"
Aspect="AspectFill"
AutoPlay="True"
KeepScreenOn="True"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
Grid.ColumnSpan="3"
/>
<BoxView Opacity="0.0" BackgroundColor="#00C2FF"/>
<Button x:Name="Back" BackgroundColor="Yellow" Grid.Column="0" Opacity="0.2" Clicked="RewindVideo"></Button>
<Button x:Name="Forward" BackgroundColor="Red" Grid.Column="2" Opacity="0.2"></Button>
</Grid>
Page.xaml.cs
...
private void RewindVideo(object sender, EventArgs e)
{
if (LessonVideo.CanSeek)
{
LessonVideo.Position = TimeSpan.FromSeconds(LessonVideo.Position.TotalSeconds - 5);
}
}
I've experimented with stopping and playing the video, but nothing seems to be working. Help me out and point me in the right direction how to solve this. Thank you in advance.
Related
enter image description hereI want to implement the xamarin essentials map, but with a floating search for the pins that will appear on this map. I'm using a grid to divide the grid's rows and thus use the first row for the map and the second to show a cardview related to the selected pin. I put the search control in row 0 so that it seems to float on the map.
I couldn't get the focus of the search control to work. I don't know if I'm implementing the InputTransparent property correctly.
Any ideas?
<Grid InputTransparent="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="140"/>
</Grid.RowDefinitions>
<maps:Map
x:Name="map"
Grid.Column="0"
Grid.Row="0"
Grid.RowSpan="2"
MapType="Street"
HasZoomEnabled="True"
IsShowingUser="True"
InputTransparent="False"
MoveToLastRegionOnLayoutChange="false"
>
</maps:Map>
<StackLayout Grid.Row="0" Grid.Column="0" InputTransparent="True">
<Frame
Margin="20,40,20,0"
Padding="0"
BorderColor="{StaticResource BlackColor}"
CornerRadius="8"
HeightRequest="35">
<Grid VerticalOptions="CenterAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="35" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="35" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="35" />
</Grid.ColumnDefinitions>
<Image
Grid.Row="0"
Grid.Column="0"
HeightRequest="20"
HorizontalOptions="Center"
Source="ic_search_bar"
VerticalOptions="Center"
WidthRequest="20" />
<controls:CustomEntry
x:Name="entrySearch"
Grid.Row="0"
Grid.Column="1"
FontSize="14"
HeightRequest="35"
HorizontalOptions="FillAndExpand"
HorizontalTextAlignment="Start"
Keyboard="Text"
Placeholder="¿Qué se te antoja hoy?"
PlaceholderColor="#979797"
ReturnCommand="{Binding SearchCommand}"
InputTransparent="False"
ReturnType="Search"
Text="{Binding SearchText}"
TextChanged="entrySearch_TextChanged"
VerticalOptions="FillAndExpand"
VerticalTextAlignment="Center" />
<Image
Grid.Row="0"
Grid.Column="2"
HeightRequest="15"
HorizontalOptions="Center"
Source="ic_clear_search.png"
VerticalOptions="Center"
WidthRequest="15">
<Image.GestureRecognizers>
<TapGestureRecognizer Command="{Binding ClearSearchCommand}" NumberOfTapsRequired="1" />
</Image.GestureRecognizers>
</Image>
</Grid>
</Frame>
</StackLayout>
</Grid>
I try to use the property in many parts of the code
From the docs on InputTransparent
true if neither the element nor its children should receive input and
should, instead, pass inputs to the elements that are visually behind
the current visual element
Your stackLayout is transparent so it’s children, including the Entry, are also transparent
You might be thinking InputTransparent does the opposite of what it actually does. True makes an area effectively invisible to touch; touch goes through it.
If you want an element to be touchable, it has to be "False". BUT all its ancestors must also NOT BLOCK touch.
If you really mean "True", but you have children you want to click on, do this:
<SomeLayoutNameHere InputTransparent="True" CascadeInputTransparent="False" ...>
That allows children to specify whether they can receive touch (InputTransparent=False), or are invisible to touch (=True).
"False" is the default.
I have a progress bar in Xamarin Forms defined in my XAML.
Actually I want to add labels beneath the progress that shows the minimum and maximum value of the progress bar as shown in the image below:
My XAML code:
<StackLayout Orientation="Vertical" Margin="5">
<Frame Padding="10"
BackgroundColor="White"
HeightRequest="80">
<Frame.Content>
<Label Text="%" HorizontalTextAlignment="End" FontSize="Small"/>
<ProgressBar x:Name="myProgressBar" WidthRequest="100"
HeightRequest="15" VerticalOptions="Center" HorizontalOptions="Center" Progress="0.2"/>
</Frame.Content>
</Frame>
</StackLayout>
Can someone please help me to achieve this in Xamarin Forms ? Also, how can I add a gradient color like in the image ?
For the text, you would probably want to use labels positioned under the progressbar. I'd recommend a grid with two rows.
As for the gradient, unfortunately the xamarin forms progress bar doesn't support this out of the box. You can either create a custom renderer for each platform that draws the gradient, or consider a third party control like Syncfusion's (https://www.syncfusion.com/products/xamarin/progress-bar)
You can make a custom Xamarin Forms control.
The content could be something like that:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.5* />
<ColumnDefinition Width="0.5* />
</Grid.ColumnDefinition>
<Image x:Name="gradientImage" Grid.Row="0" Grid.ColumnSpan="2" Margin="10,10,10,0" />
<Frame x:Name="progressFrame" Grid.Row="0" Width="{Binding Progress}" HorizontalOption="End" BackgroundColor="Gray" ... />
<!-- Labels -->
<Label x:Name="startLbl" Grid.Row="1" Grid.Column="0" Text="{Binding startLabel}" HorizontalOption="Start" />
<Label x:Name="endLbl" Grid.Row="1" Grid.Column="1" Text="{Binding endLabel}" HorizontalOption="End" />
</Grid>
For the gradient progress bar, instead of CustomRenderers you can use an image.
this image will be the full width gradient bar
over this image, like a MASK, there is a frame. You have to compute the frame width depending on the progress value. ==> It will 'make appear" the gradient image smotthly when progress will increase.
Hope you understand the concept :)
Then in the code behind (in your ViewModel ?) manage the start/end label values and the computation of the "progress" value... I presume you will have to make a Binding Converter for: "progress" ==> "bar Width"...
Tell me if it's clear
Wanted to comment on above answer from #KFactory but don't have permission yet.
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.5* />
<ColumnDefinition Width="0.5* />
</Grid.ColumnDefinition>
Has a few typos. missing end quotes and s on closing tag. Should be
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.5*" />
<ColumnDefinition Width="0.5*" />
</Grid.ColumnDefinitions>
I am trying to create a custom, material-style, card cell in my Xamarin Forms app. I have the appearance pretty much down, but I'm having problems with the image in it. I want it to touch the top and bottom edges, the left hand edge, and be a square sort of shape, while maintaining the aspect ratio. But right now, all I get is this small image that won't play ball:
(I've had to cover the company images with paint, but trust me that they're about that size).
Here's what I actually want (again, please excuse the paint job)
I'm using an image in a grid view, in the 1st column and spanning all 4 rows. I've tried all of the LayoutOptions, which I used to understand but now I'm second guessing myself. I've also tried putting the image in a StackLayout as I thought you can expand children of a Stacklayout, but still no dice. Here is my simplified Xaml right now:
<Frame CornerRadius="10"
Margin="10, 5"
IsClippedToBounds="True"
BackgroundColor="White">
<Grid BackgroundColor="White" >
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<StackLayout Grid.Row="0" Grid.Column="0" Grid.RowSpan="4"
HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<Image HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Aspect="AspectFill" Source="{Binding ImageSource}"/>
</StackLayout>
<Label Grid.Row="0" Grid.Column="1"
Text="{Binding Favourite.FavKindName}"
FontSize="{DynamicResource InfoLargerTextFontSize}"/>
<Image Grid.Row="1" Grid.Column="3" Grid.RowSpan="4" Source="Contact.png"
VerticalOptions="CenterAndExpand" >
<Image.GestureRecognizers>
<TapGestureRecognizer />
</Image.GestureRecognizers>
</Image>
</Grid>
</Frame>
What's more, you can probably tell I'm pretty clueless about the phone icon on the right. I want that to occupy the centre and be of a decent button size for the card cell.
I've spent hours trying to figure this out. What am I doing wrong?
Frame has a default Padding of 20. That's why you have those margins inside the frame.
<Frame Padding="0" // Here , set padding to 0, so you can fill all Frame space
CornerRadius="10"
Margin="10, 5"
IsClippedToBounds="True"
BackgroundColor="White">
I have a Panorama control, which has an ExpanderView Item (from Silverlight toolkit).
My client wants this page to be customizable. Thats why I created 3 level of binding:
The PanoramaItems, the ExpanderView headers and the ExpanderView content.
The problem when I set the itemssource of the Panorama control. it takes about 5 seconds to show the items.
Any idea how I can solve this?
C# code:
private void panorama_Loaded(object sender, RoutedEventArgs e)
{
this.DataContext = App.Products;
}
XAML Code:
<controls:Panorama Loaded="panorama_Loaded" x:Name="panorama" ItemsSource="{Binding}">
<controls:Panorama.ItemTemplate>
<DataTemplate>
<ListBox ItemsSource="{Binding Sub_Products}" >
<ListBox.ItemTemplate>
<DataTemplate>
<toolkit:ExpanderView Header="{Binding}" Expander="{Binding}" ItemsSource="{Binding Sub_Sub_Products}">
<toolkit:ExpanderView.ExpanderTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image VerticalAlignment="Center" Source="Images/List.png" Width="25" />
<TextBlock Text="{Binding Title}" />
</StackPanel>
</DataTemplate>
</toolkit:ExpanderView.ExpanderTemplate>
<toolkit:ExpanderView.ItemTemplate>
<DataTemplate>
<Grid Margin="-30,0,0,0" Background="White" Width="450" Tap="Grid_Tap" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="{Binding ImageSource}" />
<StackPanel VerticalAlignment="Top" Grid.Column="1">
<TextBlock Text="{Binding Title}" />
<TextBlock Text="{Binding Description}" />
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
<TextBlock Margin="0,12,32,0" Grid.Row="1" Text="Learn more" />
</StackPanel>
</Grid>
</DataTemplate>
</toolkit:ExpanderView.ItemTemplate>
</toolkit:ExpanderView>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DataTemplate>
</controls:Panorama.ItemTemplate>
</controls:Panorama>
You could try to collapse the panorama items that are off screen and only set visibility to visible on demand. That should at least reduce the size of the visible tree.
A good way to find the slow parts is to use the profiler in Visual Studio. You will find one frame which is really slow (it will have a render time of 5 seconds in your case). Then dig into the visual tree of that frame and see which elements took a long time to render and try to optimize these.
Remove the ExpanderView ItemsSource binding in xaml and bind to it when the Expander is manupulated in code. Just leave it as ItemsSource="{Binding}". That way you will dynamically build you visual tree as the user taps on the expander.
The event handler is something like below. I am assuming Product is the type in your App.Products list. Also ensure that you hook up the event in your xaml for the expander.
private void ExpanderView_ManipulationStarted(object sender, System.Windows.Input.ManipulationStartedEventArgs e)
{
var expander = sender as ExpanderView;
expander.ItemsSource = (expander.DataContext as Product).Sub_Sub_Products;
}
Hope this solves your slow loading issues and is not too late at this time.
Does anyone have the xaml to get the look and feel of this UI?
This is one way we can do your UI:
<ListBox x:Name="contentList" SelectionChanged="OnFileHit">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TextBlock Text="Marc Boyer" FontSize="{StaticResource PhoneFontSizeLarge}"/>
<TextBlock Text="Inviation check this out here" Grid.Row="1" FontSize="{StaticResource PhoneFontSizeMedium}" Foreground="GreenYellow"/>
<TextBlock Text="When: Thursday 9 PM" Grid.Row="2" FontSize="{StaticResource PhoneFontSizeNormal}" Opacity="0.5"/>
<TextBlock Text="9.45" HorizontalAlignment="Right" Grid.Row="0" Grid.Column="1" FontSize="{StaticResource PhoneFontSizeNormal}"/>
<Image Grid.Row="1" Grid.Column="1" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
u Should use panorama and pivot pages to get this kinda UI. Its not very difficult to design such UI but i currently don't have a similar looking screen. probably this link might help u better.
http://www.silverlightshow.net/items/Windows-Phone-7-Part-5-Panorama-and-Pivot-controls.aspx
and also this
http://windowsphonegeek.com/articles/WP7-Navigation-in-depth--Navigation-controls
I found this cool templates that I think others will find it useful.
http://wp7designtemplates.codeplex.com/
the page and tabs are done using the pivot control, there is a template you can choose when you create a new project that has it in by default and also shows how you can create custom list items