We Keep Coding

Get around grid in uwp

I'm trying to create 2 grid the first one have two buttons and the other one have a title I want to make the second grid get around the first one ...
here's my code>>
<Grid x:Name="pgtitle" >
<StackPanel x:Name="btn" >
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
<AppBarButton Icon="More" Tapped="more_Tapped"/>
<AppBarButton Icon="List" Click="view_Click"/>
</StackPanel>
</StackPanel>
<RelativePanel x:Name="title">
<TextBlock x:Name="titletxt" Text="{Binding ViewModel.SelectedItem.Title}" FontSize="18" FontWeight="Bold" TextWrapping="Wrap"/>
</RelativePanel>
</Grid>
here's a picture for what am I trying to do>>

If you mean "get around" as in flow around, similarly to news articles and texts, that is not possible. All layout elements in XAML are rectangular and they don't take other sibling elements into account.
You can display the inner Grid in one column and other elements in second column, but the contents of such columns must be known beforehand.

Look into the RelativePanel element in UWP where you can place elements right or left of other elements. I think this can be achieved with that control.
For example, the RelativePanel will contain the smaller grid you have in your picture and will be the anchor to all other elements. You will have to set the other elements (children of the larger grid) to go on the right or bottom of the smaller grid.

Can flip view be used to show large number of itemSource?

I am developing a windows 10 Universal Application.I have a requirement like I need to show the details of a Room when I click on an item in the Rooms List.
I am planning to use a Flip-view control to show the details of a single room.
And When I swipe ,it should show the details of the second item and so on.
My question is if the item source is very large,will it make the app slow or will that create any memory usage issue?
Here is my code
<FlipView ItemsSource="{Binding RoomsCollection}" Loaded="FlipView_Loaded" >
<FlipView.ItemTemplate>
<DataTemplate>
<Grid>
<TextBlock Text="{Binding Room.Id"} HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="Red"/>
</Grid>
</DataTemplate>
</FlipView.ItemTemplate>
So if the RoomsCollection goes say more that 1000 since i am using a flip view will the entire collection be loaded initially or is there any kind of visualization implemented by the control?

Empty LongListSelector causes infinite ScrollViewer

This is the situation:
I have a datasource that gets filtered by certain attribute (lets call it Checked), into two lists on the viewmodel. Call it New and Old.
New one needs to be displayed into one list, Old one needs to be displayed into the list right under it.
Oh and they need to scroll in unison. So if Old is currently out of screen, it will swim into visibility as the list is swiped up.
I've currently solved this with LongListSelectors like this:
<ScrollViewer VerticalAlignment="Top" VerticalScrollBarVisibility="Auto">
<StackPanel>
<phone:LongListSelector x:Name="NewList" Margin="0,0,0,0" ItemsSource="{Binding New}" SelectionChanged="NewList_SelectionChanged">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding Name}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}" Foreground="{Binding Color}" />
</StackPanel>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
<phone:LongListSelector x:Name="OldList" Margin="0,0,0,0" ItemsSource="{Binding Path=Old}" Padding="0,20,0,0">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding Name}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}" FontStyle="Italic" Foreground="{Binding Color}"/>
</StackPanel>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</StackPanel>
</ScrollViewer>
Two longlistselectors inside a stackpanel inside a scrollviewer. Now it all works absolutely fab while there's something in both of those lists.
However, when one of them has no content whatsoever, it immediately expands to fill the entire height of its parent. In this case... the infinite scrollviewer. Which means that if there's nothing in the New list, there will be absolutely nothing visible on the screen whatsoever and if there's nothing on the New list... I can pretty much scroll infinitely after getting past the New list items.
Do I have any options here? Without programmatically creating a ton of Text fields and then trying to attach events to it, or worse, write my own list control? Standard listboxes don't work because they both scroll separately.
Any ideas?

Having two list controls under each other is a genrally a bad idea, because of ScrollViewers inside ScrolViewers.
I would advise you to use a single LongListSelector without any ScrollViewer around it.
Then create a single collection with old an new items and use an ItemTemplateSelector to style them differently.

The problem you are facing is that by the default when emty LLS is measured it's height as you see is 'infinite'. You are using StacPanel which means that second LLS is under infinite LLS.
The simples solution is to set the Height of LLS:
<phone:LongListSelector x:Name="NewList" Height="300" Margin="0,0,0,0" ItemsSource="{Binding New}" SelectionChanged="NewList_SelectionChanged">
If you can - use a Grid with defined rows instead of StacPanel. If you still want to use StackPanel, you can override the method MeasureOverride() in LLS and make extension.
It should work if you do it like this:
namespace Extensions
{
public class LongListSelectorEx : LongListSelector
{
protected override System.Windows.Size MeasureOverride(System.Windows.Size availableSize)
{
if (this.ItemsSource == null)
return new System.Windows.Size(this.Width, 0);
if (this.ItemsSource.Count <= 0)
return new System.Windows.Size(this.Width, 0);
return base.MeasureOverride(availableSize);
}
}
}
Watch out also if you haven't got width defined (the return value cannot be NaN - in that situation put 0 instead this.Width). Of course you will also need to check Height of LLS, bacause if you don't your controls can be pushed off the screen, when there are many items in LLS.
You can also read about this here

Get a textblock value in a listbox using GestureServices

Sorry guys, I had asked this question earlier but could not figure out the answer. Made an edit to see if that bumps it, but that did not seem to work. So here is the last try to the question
I can't seem to figure out how one can get the value of a specific textblock in a listbox. To start things off, here is the code:
<ListBox HorizontalAlignment="Left" Name="listItems" VerticalAlignment="Top" >
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Height="210" >
<Grid Height="210" Background="#75FFF8DC">
<toolkit:GestureService.GestureListener>
<toolkit:GestureListener Tap="GestureListener_Tap"
DoubleTap="GestureListener_DoubleTap"
Hold="GestureListener_Hold"
Flick="GestureListener_Flick"/>
</toolkit:GestureService.GestureListener>
...CODE...
</></></>...
The code area contains a bunch of other grids, partitions (columns and rows) and textblocks. Here is an example:
<Image Name="XXX" Source="{Binding XXXPath}" Stretch="Fill"
Grid.Column="0"/>
<TextBlock Name="YYY" Grid.Column="1" Grid.Row="0"
Text="{Binding YYYPath}" Foreground="Black"/>
<TextBlock Name="ZZZ" Grid.Column="2" Grid.Row="0"
Text="{Binding ZZZPath}" Foreground="Black"/>
So what I want, is if someone taps the grid (that means anything in the grid, including these textblocks and images), I want to first get the text of the textblock "YYY."
I could have inserted that code into a textblock and used sender as textblock, but I do not want to limit my gestures to one textblock, nor do I want to repeat that for each element in the grid (lots of issues and seems unnecessary).
Edit: If this does not work, I can also implement just one tap gesture (but again, for the whole grid) and use that to get the value of the textblock. Is there no way? Otherwise I will have to do this: Add tap for the textblock and use sender as a textblock, then get the value of the text. But I really do not want to use this approach.

I see you use bindings for your textblocks and image. So why don't you use ( if you haven't already done it) an IList instance of class which hold an information about them? Then set this instance as an ItemSource for your listbox. That way when user taps somewhere on listbox you can catch the SelectedIndex or SelectedItem of a listbox item. And this will help you to figure out which element of IList collection to extract so you could get your text or image or whatever you need.
And you don't need to use GestureServices from external Silverlight Toolkit with Mango. Tap, DoubleTap etc. are built-in.

Multi-Column Selector

I am searching for some hybrid of ComboBox and ListView and I am wondering why there exists nothing like that, although I feel it's a quite natural wish to have it.
In more detail:
A WPF ItemsControl should have an ItemsSource of all applicable items.
These items have multiple properties, say ID:int, Name:string and Description:string.
Now my ItemControl should:
Show these three properties as nicely aligned columns in some combobox-like drop-down
Provide some way of quickly finding an item by just typing text into a single textbox (without specifying, which property shall be searched). This should either select the first match or filter the items hiding all non-matching ones.
Key is that the control is perfectly usable without a mouse, but also provides some "explorer"-mode, if the user does not remember the perfectly identifying ID but only parts of some description or name.
A configurable "Search-Function" would be nice, and it would be no problem if you would need to explicitly state all the properties to be included in a search or display function.

There is no such control so far, but you can certainly make one easily,
Create a C# Custom Control and define control template as Expander containing a DataGrid/ListView.
You can define dependency properties of your custom control as needed for ListView and do templatebinding for them. Expander's header should be bound to selected item's text or some sort of text representation of your objects.
Alternative:
Add a GRID inside Item Template and define its column definitions. And you can specify multi column values in the GRID easily.
<ComboBox>
<ComboBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="200"/>
<ColumnDefinition Width="100"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding CustomerName}"/>
<TextBlock Grid.Column="1" Text="{Binding CustomerEmail}"/>
<TextBlock Grid.Column="2" Text="{Binding CustomerPhone}"/>
</Grid>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
By applying widths correctly, and giving margins to textblock, you can create multicolumn list to be displayed easily. Dont forget to TextSearch.SearchPath property in order to be able to select item by keyboad.