I'm using Panorama Control, and have image on the top. My XAML code as follow:
<Grid x:Name="LayoutRoot">
<Image Grid.Row="0" Source="/Images/khuyenmai.png" Height="85" Width="85" HorizontalAlignment="Right" x:Name="imgKhuyenMai" Tap="imgKhuyenMai_Tap" VerticalAlignment="Top" Margin="305,5,41,0" RenderTransformOrigin="2.205,-6.523"></Image>
<phone:Panorama Grid.RowSpan="2" Margin="0,0,0,10">
<!--Panorama item one-->
<phone:PanoramaItem Header="item1">
<Grid/>
</phone:PanoramaItem>
<!--Panorama item two-->
<phone:PanoramaItem Header="item2">
<Grid/>
</phone:PanoramaItem>
</phone:Panorama>
</Grid>
My problem is : "Tap" event is not working ?
In Grid, when Canvas.ZIndex of items is equal, the latter item will cover the ahead item. For example, in your code, Panorama will cover Image item, So you can't Tap it. There are 2 solutions, you can choose one:
set Canvas.ZIndex = 1 on Image
OR
change sort of your code like this, put Image latter than Panorama:
<Grid x:Name="LayoutRoot">
<phone:Panorama/>
<Image/>
</Grid>
Related
I use a GridView to display photos and I search an elegant way to allow user to add a new item to a form.
The form contains a lot of fields: it is displayed in a Pivot, where each PivotItem represents a category of the form.
Some categories contain one or more child items: they are displayed through a Master-Detail page.
It's in this page that I need to display a list of photos: as a photo represents a "sub sub item" of the form, I wouldn't manage the add of a new photo through the CommandBar. But I would like to use an "Add" button after the last item of the GridView containing the photos.
At this time I only found a solution that partially work:
Here is the XAML:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Text="Photos" Grid.Row="0"/>
<StackPanel Orientation="Horizontal" Grid.Row="1">
<GridView ItemsSource="{Binding images}">
<GridView.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Gray" BorderThickness="1"
Padding="10"
Height="150" Width="190">
<Image Stretch="UniformToFill"
Source="{Binding bitmap_image}" />
</Border>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
<Border BorderBrush="Gray" BorderThickness="1"
Padding="10"
Height="150" Width="190">
<Button Command="{Binding Path=DataContext.AddPhotoCommand, ElementName=DetailsPage}"
Height="100" Width="100">
<Viewbox>
<SymbolIcon Symbol="Add"/>
</Viewbox>
</Button>
</Border>
</StackPanel>
</Grid>
As I use a StackPanel, the Add button is no longer visible if I display 3 photos...
=> Is there a better way to do this? Or do you see a an alternative? I'm looking for doing this through a DataTemplateSelector, but that would require me to create a "false" object for displaying the add button...
As I use a StackPanel, the Add button is no longer visible if I display 3 photos...
If you don't mind the button is in the next line of your last photo, you can use WinRTXamlToolkit's WrapPanel instead of StackPanel to avoid the pictures goes out of the window and put the button inside the GridView's FooterTemplate:
Xaml:
<Page
x:Class="AddButtonSample.MainPage"
xmlns:controls="using:WinRTXamlToolkit.Controls"
...
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Text="Photos" Grid.Row="0"/>
<controls:WrapPanel Orientation="Horizontal" Grid.Row="1">
<GridView ItemsSource="{Binding images}">
<GridView.FooterTemplate>
<DataTemplate>
<Button Command="{Binding Path=AddPhotoCommand}" Height="100" Width="100">
<Viewbox>
<SymbolIcon Symbol="Add"/>
</Viewbox>
</Button>
</DataTemplate>
</GridView.FooterTemplate>
<GridView.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Gray" BorderThickness="1"
Padding="10"
Height="150" Width="190">
<Image Stretch="UniformToFill"
Source="{Binding bitmap_image}" />
</Border>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
</controls:WrapPanel>
</Grid>
Result:
If you really want to put the Button side by side after the last item of GridView. The only Option is DataTemplateSelector.
The best solution might be to use a CommandBar and put the "Add" button in the very bottom of the panel, as that would be most consistent with UWP design guidelines. GridView also has a FooterTemplate, which allows you to add some XAML in the footer of the whole GridView (but not directly after the items).
If you still want to have the add item as part of the GridView contents, you will really need to use the fake item and a DataTemplateSelector. This solution is not very clean, but probably is the only simple way.
I tried to do something similar for my own app too, but there really isn't an obvious way to achieve it. A little background on what my app does: it's a flashcard app that displays decks of card in a gridview on the homepage, with an add button being at the front of the gridview. This is what I did:
for my deck class, I gave it a bool attribute isButton
in the observablecollection of decks, set the first item's isButton to true
make two datatemplates for the gridview (deck and button) and make a data template picker for the gridview, and check the isButton attribute
if isButton is true, the template picker will use the button template
otherwise use deck template
I'm trying to achieve custom selection of selected item in listview. In default, selected item has border around it. I wanted to add CornerRadius to it but couldn't. So I decided to add my own border in ItemTemplate and make it visible for the currently selected item only.
Here's my ItemTemplate for Listview:
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Border Height="73"
Width="73">
<Image Stretch="UniformToFill"
VerticalAlignment="Center"
HorizontalAlignment="Center"
Source="{Binding ImgPath}">
</Image>
</Border>
<Border x:Name="CornerRadiusBorder"
Height="78"
Width="77"
BorderBrush="Blue"
BorderThickness="3"
CornerRadius="3">
</Border>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
I want to make CornerRadiusBorder visible only for selected item.
I have a Windows Phone 8 listpicker that I'm trying to change the background color of, however, it only seems to change the item background and not the dropdown box background as you can see in the screen capture. The dropdown box seems to be binded to the WP8 theme. How can I change the background of the entire dropdown box and not just each individual item?
<toolkit:ListPicker x:Name="BackgroundListPicker" Background="Black" ItemsSource="{Binding BackgroundsList}">
<toolkit:ListPicker.ItemTemplate >
<DataTemplate x:Name="BackgroundItemTemplate" >
<Grid HorizontalAlignment="Stretch" Background="Black" VerticalAlignment="Stretch" Margin="0,0,0,0">
<StackPanel Orientation="Horizontal">
<Image Source="{Binding BackgroundThumb}" Width="30" Height="30" HorizontalAlignment="Left" />
<TextBlock Text="{Binding BackgroundName}" Foreground="White" Margin="12,0,0,0" HorizontalAlignment="Right"/>
</StackPanel>
</Grid>
</DataTemplate>
</toolkit:ListPicker.ItemTemplate>
</toolkit:ListPicker>
So your issue was that you were attempting to apply an image to an item. When you needed to hit the control itself that the items populate via ItemsPresenter so by pulling out the default style template for the control, and either making a place to pass in your image for an instance, or placing one directly into the template itself. You get your resulting background image for the ListPicker background to fall behind the items populating it.
Glad you found your remedy! Cheers.
i want to display large image in small control such that entire image can be scrolled.
for this, i have used following code but i could only succeed in achieving vertical scrolling.
what should i do for enabling both, horizontal and vertical scrolling ?
<Grid HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Row="1" Width="470">
<ScrollViewer x:Name="scrollViewer" Width="470" Height="270" HorizontalAlignment="Left" VerticalAlignment="Top">
<Image Name="drag" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Top"/>
</ScrollViewer>
</Grid>
if there is any other solution than using scrollviewer then please share it, or mention any changes in this code which are useful for achieving the same.
Try
<Grid HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Row="1" Width="470">
<ScrollViewer x:Name="scrollViewer" Width="470" Height="270" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"HorizontalAlignment="Left" VerticalAlignment="Top">
<Image Name="drag" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Top"/>
</ScrollViewer>
</Grid>
You need to set HorizontalScrollBarVisibility and VerticalScrollBarVisibility properties to achieve desired scrolling.
Edit :
If you want to see the scroll bars always you can set HorizontalScrollBarVisibility="Visible" and VerticalScrollBarVisibility="Visible" .Otherwise("Auto") scroll bars will appear based on the content size
In my application, I am having a ListView. ListView lists a set of images.
So when the application is running, and when that page is loaded, a list of images are shown.
<ListView ItemsSource="{Binding imageLists}" Background="Red" Tapped="ListView_Tapped">
<ListView.ItemTemplate>
<DataTemplate>
<Grid Background="Green">
<Image Source="{Binding imagePath}" CacheMode="BitmapCache" Stretch="UniformToFill"/>
<StackPanel Name="imageTitle" Visibility="Collapsed" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
As you can see from the code, I have one image & stackpanel inside the listview. And the stackpanel's visibility has been set to collapsed for convenience.
The StackPanel imageTitle resides inside the ListView. Stackpanel contains a TextBlock housing the images name. For now it's dumy text.
On Tapping any image in the list, I am trying to make the stackPanel visible.
The Code Behind:
private void ListView_Tapped(object sender, TappedRoutedEventArgs e)
{
imageTitle.Visibility = Windows.UI.Xaml.Visibility.Visible;
}
Since the stackpanel is inside the listview & I am trying to make it visible on the tap event of the listview, I am not able to acheive the needed result. I know my code is wrong.
If I specify the stackpanel outside the listview, I can make it visible using the code I gave inside the ListView_Tapped function. But even in that case, I need to show the stackpanel (name of the image I clicked) inside the listview item (image I clicked).
Any help??
Can this be achieved using only XAML?
Here's a pure xaml way.
Rather than changing the Visibility of the imageTitle (not a great UX), let's change its Opacity to make its appearing more interesting.
First we need to create a storyboard inside this data template. This storyboard will fade in the imageTitle in 400ms.
And then we drag a ControlStoryboard behavior from Expression Blend's Asset panel onto the top level Grid. Basically we want the storyboard to fire off when this Grid is tapped.
Please see below code for reference.
<DataTemplate x:Key="GroupTemplate">
<Grid Background="Green">
<Grid.Resources>
<Storyboard x:Name="ShowImageTitleStoryboard">
<DoubleAnimation Duration="0:0:0.4" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="imageTitle"/>
</Storyboard>
</Grid.Resources>
<Interactivity:Interaction.Behaviors>
<Core:EventTriggerBehavior EventName="Tapped">
<Media:ControlStoryboardAction Storyboard="{StaticResource ShowImageTitleStoryboard}"/>
</Core:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
<Image Source="{Binding Image}" CacheMode="BitmapCache" Stretch="UniformToFill"/>
<StackPanel x:Name="imageTitle" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center" Opacity="0">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
Apart from JustinXL's answer it can also be done by using ChangePropertyAction. Also pure XAML:
<DataTemplate>
<Grid Background="Green">
<Image Source="{Binding imagePath}" CacheMode="BitmapCache" Stretch="UniformToFill">
<i:Interaction.Behaviors>
<ic:EventTriggerBehavior EventName="Tapped">
<ic:ChangePropertyAction TargetObject="{Binding ElementName=imageTitle}" PropertyName="Visibility" Value="Visible"/>
</ic:EventTriggerBehavior>
</i:Interaction.Behaviors>
</Image>
<StackPanel Name="imageTitle" Visibility="Collapsed" Background="Blue"
HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Foreground="White" Text="Dumy Image Title" FontSize="10"/>
</StackPanel>
</Grid>
</DataTemplate>
It's just another way to change a property - JustinXL's answer will provide nice animation with opacity, which will look much better.
I dunno why you specifically want to handle the scenario using XAML. For the Microsoft's recommended MVVM model you should bind a property to your element field and then you can write a converter for the same to return back "Visible" or "Collapse".