Nested ListView scrolling - c#

I am having some issues in my Windows 8.1 app regarding getting a nested ListView to scroll properly. Basically I have the following scenario:
I have a page that needs to display a list of 'packages' in a vertical ListView. Each of those packages then has 1-15 images inside of it that I would then like to display in a horizontal ListView. Basically this means I have a list of lists that I would like to display (display the main list vertically, and for each list in the vertical list, list the images horizontally).
I have this almost working, but when it comes to trying to scroll through the nested ListView of images, it is very difficult because the scroll bar/area is right below the images and most of the time you end up touching the image and "selecting" it instead. I'd like to be able to swipe to scroll but I can't seem to get that to work either.
Is there a better way to approach getting a nested horizontal listview to scroll properly? I think one of the issue may be that my touch events aren't being routed the way I want them to be.
At this point my XAML for this looks like the following:
<ScrollViewer x:Name="OuterScrollView">
<ListView x:Name="ImageRoot" Height="851" Width="656" DataContext="{StaticResource GlobalDataContext}" ItemsSource="{Binding MainImageInfo.ImagePackages}">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="{Binding PackageName}"/>
<ScrollViewer>
<ListView>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemTemplate>
<DataTemplate>
<Image Source="{Binding ImageBitmap}" Height="200" Width="200"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollViewer>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollViewer>
Any feedback is appreciated.

Related

WPF Wrap ListView, or Grid DataTable

i am trying to make a XAML with wrapping list view, or is it a grid, or table. I am just not sure. Please take a look at the image. How would i go about formatting my "list" that needs to wrap around the view, can someone please give me sample XAML, as i have no idea how to realize how to make this view.
It seems i need to use a ListView inside a Wrappanel of some sort? The data is dynamic, such as i can have any number of key/value pairs as seen here (open, high, lose, close, etc...) so keep in mind the pairs can have any number and they need to wrap around the control/window.
Any idea how to define such a XAML?
Thanks.
I've since figured it out. I'm using an itemcontrol instead of a list and put a wrappanel. Like this.
<ItemsControl ItemsSource="{Binding DataItems}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Width="100" Text="{Binding KeyText}"></TextBlock>
<TextBlock Width="100" Text="{Binding ValueText}"></TextBlock>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>

Windows Phone 8.1 flow container for dynamic buttons

SOF Tribe,
I have a request for the identity of a flow container into which I can pour an indeterminate number of dynamically created XAML buttons. Said buttons should wrap the text as closely as possible (I think I have a template for this). But the buttons should wrap like a gridview, but run like a stackpanel. Does anyone know a container that will allow me to accomplish what the image portrays?
Currently, for the existing image below, I'm using a gridview, but the gridview sets a specific width but does flow unevenly. A stackpanel has the desired end-to-butt style but won't wrap. So, any ideas?
There is what is called the UniversalWrapPanel made by Greg Stoll. So, that's the direction I'll be taking. Now however, I've got the last little bit to tackle. How to get the bound data to respect the parent container's ability to wrap content and not just stack it up in a vertical column.
The below XAML gives me the below image result which is not quite what I want. Statically added buttons work just fine to the UniversalWrapPanel. But trying to get a binding and ItemsSource to work, well, that's beyond me at this time.
<support:UniversalWrapPanel Orientation="Horizontal" Background="White">
<ItemsControl x:Name="GridViewRecipients" ItemsSource="{Binding}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Style="{StaticResource ButtonLozengeStyle}" Content="{Binding FullName}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</support:UniversalWrapPanel>
OK, so a bit more searching and I found this:
http://www.visuallylocated.com/post/2015/02/20/Creating-a-WrapPanel-for-your-Windows-Runtime-apps.aspx
and so here is the correct way to reference the UniversalWrapPanel within the ItemsControl:
<ItemsControl x:Name="GridViewRecipients" ItemsSource="{Binding}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<support:UniversalWrapPanel Orientation="Horizontal" Background="DodgerBlue"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Style="{StaticResource ButtonLozengeStyle}" Content="{Binding FullName}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
For the result of:

WrapPanel in a ListView (Metro)

I have the following code in a Metro app. The listview binds up to a list of objects. My problem is that the WrapGrid assigns them equal width. But some Titles are longer then others so width should be set width to Auto. But this dont work.. anyone have any idea?
<ListView>
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" >
<TextBlock Text="{Binding Title}"/>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapGrid Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
This works for me:
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapGrid ItemWidth="250" ItemHeight="80" MaximumRowsOrColumns="7" VerticalAlignment="Center" HorizontalAlignment="Center" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
The key point here is MaximumRowsOrColumns property. Have fun :)
I think it's not the WrapGrid, but the ListView itself through the ListViewItem/ItemContainerStyle that makes them same size. I don't think there really is a workaround for that though. You could use your own ItemsControl and custom panel or calculate the desired size of each item and based on that - put the items in something like a VariableSizedWrapGrid, setting RowSpan/ColumnSpan appropriately to match that desired size. Other than that - you can either make all items wide enough to fit everything or simply clip the content and display the full strings in the detailed view once the user clicks an item.

Add more of my usercontrol container or usercontrol collection display

I do not know what the container/control im looking for would be called, so I cannot really search for it.
Add More of Same Usercontrol Usercontrol
Clicking on + would add a new instance of My Usercontrol to the right of the existing ones
Clicking on X would dispose the usercontrol that was clicked
I'm not really looking for a tab control that would put each new instance on a new tab, but if there is nothing else then it might do.
The design is not to be as shown in the image obviously, the image just illustrates the basic idea
Any keyword/name suggestions or links to existing implementations?
e.g. Maybe there is a style that turns a ListBox into something suitable?
I would use an ItemsControl and customize it's ItemsPanelTemplate to be whatever you want.
ItemsControls are meant for iterating through a collection of objects, and displaying them in whatever form you want. I wrote some simple code samples of them here if you're interested, or here's another quick example:
<DockPanel x:Name="RootPanel">
<Button Style="{StaticResource AddButtonStyle}"
DockPanel.Dock="Right" VerticalAlignment="Center"
Command="{Binding AddItemCommand" />
<ScrollViewer>
<ItemsControl ItemsSource="{Binding MyCollection}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<local:MyUserControl />
<Button Style="{StaticResource RemoveButtonStyle}"
Command="{Binding ElementName=RootPanel, Path=DataContext.RemoveItemCommand}"
CommandParameter="{Binding }"
HorizontalAlignment="Left" VerticalAlignment="Top" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</DockPanel>
Your ItemsControl would be bound to an ObservableCollection of objects, and your Add/Remove buttons would simply add/remove items from that collection. Since it is an ObservableCollection, it will notify the UI when the collection gets changed and automatically update.
You can indeed use a ListBox and set its ItemTemplate and ItemsPanelTemplate:
<ListBox>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"></StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Label Content="{Binding Name}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Of course, your ItemTemplate would be a reference to your control.
You could look at something called a carousel control which uses a list of objects behind it and displays them similarly to itunes. This could be a bit over the top but is one solution. An example can be seen here
If this is too advanced for your needs, could it be as simple as a stackpanel with a scrollbar which is bound to a list of your user controls?

Getting only 3 items of the text block visible on the list

I have a list box that is scrolls horizontally, it has a text block within, am binding data to the text block dynamically , this data is coming from a server,i have folders coming from the server and am displaying only the names of these folders in this list box.suppose there are 10 folders on the start of the App i want only first three names to be visible on the list(the effect should be something like the Panorama page), then when i scroll next three names should be visible and which ever is closest to the middle that folder should get expanded... and which ever name is highlighted for that name the BG of the list box should change to Green.
Please help me out am very new to WP7
the code am using is
<ListBox BorderBrush="White" Background="LightGray" ItemsSource="{Binding DisplayItem}" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Disabled" Margin="36,122,34,500" Grid.Row="2">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal">
</StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Height="75" Width="250" FontSize="28" Foreground="Black" Text="{Binding WidgetName}" HorizontalAlignment="Center">
</TextBlock>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
In order to achieve the panorama view, listbox is not your best choice. Code Samples has an example called Panorama/Pivot Sample.
Check it, i think this is what you're looking for, it describes the method used in addition to sample codes.

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