Stack Overflow
Stack Overflow

Questions tagged [virtualizingstackpanel]

Arranges and virtualizes content on a single line that is oriented either horizontally or vertically.

The standard layout system creates item containers and computes layout for each item associated with a list control. The word "virtualize" refers to a technique by which a subset of user interface (UI) elements are generated from a larger number of data items based on which items are visible on-screen. Generating many UI elements when only a few elements might be on the screen can adversely affect the performance of your application. The VirtualizingStackPanel calculates the number of visible items and works with the ItemContainerGenerator from an ItemsControl (such as ListBox or ListView) to create UI elements only for visible items.

88 questions
1
vote
1 answer

Does Silverlight have a VirtualizingStackPanel?

Does Silverlight have a VirtualizingStackPanel? If there is no built in type are there any third party controls that implement this?
Aaron Fischer
  • 20,853
  • 18
  • 75
  • 116
1
vote
0 answers

Scroll the virtualized items control to the bottom

How to scroll the virtualized items control to the bottom when it initially loading? i have tried this, scroll bar jumps while loading. initially its in middle position and then jumps bottom.. is there is any other way to show the last item in the…
Ponraja
  • 570
  • 2
  • 6
  • 17
1
vote
2 answers

Scroll a ListBox's VirtualizingStackPanel with buttons

I have a Listbox displaying 5 items at a time, horizontally. I want to implement a 'Previous' and 'Next' button that when clicked, will display the previous set of 5, or next set of 5 items. I am not displaying the horizontal scroll bar, as I…
TheGeekYouNeed
  • 7,509
  • 2
  • 26
  • 43
1
vote
1 answer

Is it possible to use VirtualizingStackPanel in a FlipView?

Currently my FlipView allows the user to select multiple pictures from the local Pictures folder and then display the selected images in FlipView. However it will only work if the user selects a small number of pictures. When too many large images…
Poji
  • 39
  • 7
1
vote
1 answer

GridView and Virtualizing Stackpanel to display a grid of items

I am trying to create a grid containing elements such as | 1 | 4 | 7 | | 2 | 5 | 8 | ===> extend | 3 | 6 | 9 | Since the data is very large, I need to use UI virtualization and what I see in most example is the VirtualizingStackPanel Here is how I…
rydgaze
  • 1,050
  • 13
  • 24
1
vote
1 answer

VirtualizingStackPanel Loses images when scrolled off screen

I have a GridView that has a VirtualizingStackPanel as the ItemsPanel. The items are bound to a collection of my model objects on my viewModel. The specific properties that I am binding to in the itemtemplate are an image and three strings. When the…
James Pack
  • 824
  • 1
  • 10
  • 19
1
vote
1 answer

WP7 - VirtualizingStackPanel bottom margin does not work

I have VirtualizingStackPanel in ListBox ItemsPanel. If I set Margin="0,0,0,50" then margin is not showed but if I set left margin (or top or right) Margin="50,0,0,0" then margin works correct. If I change VirtualizingStackPanel for StackPanel then…
Earlgray
  • 647
  • 1
  • 8
  • 31
1
vote
0 answers

How to decorate VirtualizingStackPanel

Is there a simple way to decorate VirtualizingStackPanel? If I put VirtualizingStackPanel directly in ScrollViewer, virtualization will work. My goal is to override the Decorator.OnRender() method and draw some geometry behind a…
user990095
  • 23
  • 5
1
vote
3 answers

WP7 Listbox how UI virtualization work

I'm using ListBox which has VirtualizingStackPanel, which is said to support UI virtualizing by default. However, when I set my listStudent (of type ObservableCollection, and have 5 Students in it) as ItemsSource for my Listbox. Then whenever user…
onmyway133
  • 45,645
  • 31
  • 257
  • 263
1
vote
0 answers

Inheriting VirtualizingStackPanel, InternalChildren.Count returns zero

I implement some additional logic for elements arrangement. I override MeasureOverride and ArrangeOverride. If I inherit from StackPanel everything works. What is not the case for VirtualizingStackPanel as a parent. Debug revealed that…
Pavel Voronin
  • 13,503
  • 7
  • 71
  • 137
1
vote
0 answers

VirtualizingStackPanel erratic behavior when resizing

I'm working on custom control which uses VirtualizingStackPanel with mode set to "recycling" and I run into following problem: https://i.stack.imgur.com/76oSZ.png It happens when I "play" with columns width for a while and then maximize the…
zduny
  • 2,481
  • 1
  • 27
  • 49
0
votes
1 answer

Referencing an item in a VirtualizingStackPanel

I'm playing with the "Grid Application," which is a C++ Metro app template provided by VS11. The main display is a collection of items displayed in a VirtualizingStackPanel:
chrisd
  • 853
  • 1
  • 9
  • 23
0
votes
1 answer

What would cause a Virtualizing ListView to sometime generate all items?

EDITED for clarity: I have 2 ListView i my application. The first one contains a List < KeyPair< String, List< Elements > >. The display of the items in the list is templated to show only the Key (String). When the user selects an item in this…
Spez
  • 33
  • 6
0
votes
0 answers

Tooltip flickers when an off screen Item of a ListBox updated (VirtualizingStackPanel, ICollectionView)

I have a collection of contacts. Each contact has a Status indicator. Using the VirtualizingStackPanel ItemPanel, when viewing item 1-10, I am expecting any update on, say, item#100 would not cause the rerendering on item 1-10. It seems like they…
Uncle-PiE
  • 1
  • 1
0
votes
2 answers

How to make listbox placed in a large canvas in wpf more performant?

I have a custom UserControl looks like this: The brown boxes are ListBoxItems in a ListBox control and there are many such items. Each item again contains a lot of other controls, like images, text blocks among others. They and a Rectangle control…
tmsh
  • 71
  • 1
  • 9
1 2 3
4
5 6