Wpf stackpanel scrollbar. The StackPanel is very similar to the WrapPanel, but with at least one important difference: The StackPanel doesn't wrap the content. Wpf stackpanel scrollbar

 
 The StackPanel is very similar to the WrapPanel, but with at least one important difference: The StackPanel doesn't wrap the contentWpf stackpanel scrollbar Controls

I'm using only vertical scrollbar, not need horizontal scrollbar. To make it scroll in a StackPanel you have to specify the height of the GridView. the markup is pretty much like the following. Called before the BringIntoViewRequested event occurs. ScrollChrome) for some unknow reason, have to convert to string to compare. StackPanel), so there is never "more content than space". horizontal { margin: 0; padding: 0; } . Share. Otherwise, you'll need to use the ScrollBar control and manually control what's visible. Column="0" VerticalAlignment="Stretch" Height=". The other solution is to use a decent layout container. Is there any way to add a simple vertical scrollbar? I have tried this below and add my content into it : <ScrollViewer VerticalScrollBarVisibility="Auto"> <Grid> <StackPanel> //Content </StackPanel> </Grid> </ScrollViewer> Add scrolling to a StackPanel in a Grid Column. Example. In the following example, we will be using stack panels inside a grid. Share. The child elements of. <StackPanel Orientation="Horizontal" Height="100"> If you don't it will have an infinite height and that's why you see no scrollbars. リソースディクショナリーで使うときは、下記を追加でsysが使えたのでメモ. If I take the stack panel out of the equation and just have the datagrid in the grid, the scrollbars work fine. . Controls. VerticalScrollTo="50">. Since there are too many images to show on one screen, I want to add two 'buttons' (left en right of the stackpanel) that allow the user to scroll through them. That'll work. The content within a scrollable layout control (the ScrollControl class descendant) can be scrolled via scroll bars, the drag scroll feature (see the ScrollControl. A horizontal StackPanel will always give its children their desired width, so it will never force the Grid to be larger than it wants to be. Now the total width of the content of the grid exceed 500 points and this means that ScrollViewer will show scroll bars. <StackPanel Grid. Just replace ListView with Gridview in your code. Here is the style: <Style x:Key="ScrollThumbs" TargetType=" {x:Type Thumb}"> <Setter Property="Template"> <Setter. WPF's ScrollViewer tries to scroll entire elements into view at a time, which is why you see the jumpy scroll behavior. This stackpanel will contain databound images. Connect and share knowledge within a single location that is structured and easy to search. Remarks. Nesting of layout means the use layout panel inside another layout, e. Learn how to use the scrolling methods of the ScrollViewer element to incrementally scroll content by line or page in a ScrollViewer. Evenly space elements in StackPanel. You could, but the VerticalScrollBarVisibility is an attached property that you can set directly on the StackPanel. e. Top (Margin. How to stack up the stackpanel vertically if it does not fit in the app? below code works fine with full screen app; With resizing it does not fit due to fixed width; With resize, How to stack up vertically. Let’s have a look at the following XAML code. Hope someone can tell me what I am missing. 1. Children. The Viewport's size is that of the ScrollViewer minus the area of the Scrollbars. ScrollViewer OverviewIn this case, StackPanel itself is resized when XtraScrollableControl is resized. MSDN has an example to set the vertical bar on the left: ScrollViewer ControlTemplate Example [ ^] To put the horizontal bar on the top, change its Grid. ScrollViewer's ScrollBar Doesn't Appear. the size they take up in their container, and an internal size,. Height. Controls. So now set the WrapPanel's Margin to: Code Snippet. Hi jralden, WPF stackpanel will give the space element needs, so there is no need contain a scrollviewer, if you have to use StackPanel, you could use ScrollViewer to wrapper your TreeView, for example: <ScrollViewer Height="200" CanContentScroll="True" VerticalScrollBarVisibility="Auto"> <TreeView x:Name="MeasureTreeView". @Rohit I don't really know what more to explain. Share. the scrollviewer is working fine if I drag the scrollbar. Share. Panning: Moving content vertically or horizontally using touch or pen input. Modified 9 months ago. Get current offset from ScrollViewer. Content within a user interface is often larger than a computer screen's display area. However, you can use ListView with horizontal scrollbar: <ListView ScrollViewer. Pages are continually updated to stay current, with. I set the height of the ListView to auto for it to take up all the space in the region. Stack panels are used by ItemsControls like Menu, ListBox, and ComboBox. Make the scroll viewer as a Parent of the stack panel and then add the child elements. 3. var scrollViewer = new ScrollViewer () { HorizontalScrollBarVisibility. It's basically going to ask each child element how big it wants to be and however much space it asks for it's going to give it. Welcome to WPF Tutorials | Scrolll Viewer in WPF | WPF ScrollviewerIn this part of WPF controls, we're going to check out the ScrollViewer. StackPanel will grow until it can contain the whole DataGrid, so in this case the DataGrid has its vertical scroll bar set to visible but in fact its height is expanded enough so that no scrollbar is needed to appear. Solution 1 - C# Put it into a ScrollViewer. It is often used whenever any kind of list needs to be created. Step 4 - Next, you can add the one more stack panel controls inside the scroll view, change the name property and add the end tag</StackPanel>. A table panel allows you to define a grid and place a control inside each cell. 1. Orientation%2A of content within a xref:System. NET. ScrollBar to a fixed size and how to specify a minimum size for the xref:System. This is pretty late, but anyone using ListBox probably shouldn't have it in a StackPanel. 4. Add mouse wheel delta divided by certain divider to the offset. m_View; Then you don't need to wrap it in a ScrollViewer. Add this event SelectionChanged="TabControl_SelectionChanged" to your TabControl. Button button = new Button(); button. The idea thought can be used for a standard (horizontal) WrapPanel : from left to right, creating new rows when full. For example, in the Visual Studio WPF designer, select a CheckBox control, and then right-click and select Edit template > Create a copy. Fix the size of scroll viewer, Scroll viewer by default has the property to grow indefinitely if you dont specify the size, once you specify size and can content scroll property true, it will do the trick. Here controls are like Radiobutton,Lable ,CheckBox,Textblock are added dynamically in grid. XAML. 3. Panel elements do not receive focus by default. ScrollViewer but none have the desired effect, nor does changing the StackPanel to a WrapPanel or even Grid help any. Scrolling, panning, and zooming. The listview in the stackpanel layout cannot display the scroll bar. It always takes all the vertical space it needs, so the container of the ScrollPanel is much larger than the window itself, and the ScrollViewer sees no need to scroll. You were very close, just missing 1 key thing, set the scrollViewer's VerticalScrollBarVisibility attached property to Auto or Visibile. First row contains textboxes and combobox and in second row contains only listbox filled with dataclass. By default, StackPanel stacks items vertically from top to bottom in the order they are declared. That is why there is no Content property for StackPanel. please suggest me an edit if I asked my problem in wrong way. Well, I finally found solution to this: Originally, the datagrid was wrapped in the StackPanel, and then in ScrollViewer. A StackPanel, by default (If orientation is Vertical) gives each child item maximum width available but only the required height! If your required height is more than what is available (Like in you example), it will be clipped! Their is a few workarounds for this problem: 1) Fixed width (This sucks!)WPF - StackPanel. It depends on where you use your UserControl though. The HorizontalAlignment property is a type of. Usually I use Height=" {Binding RelativeSource= {RelativeSource AncestorType= {x:Type Window}},. Grid. It specifies the coordinate points of the visual to which it will scroll. Scrolling, panning, and zooming. For the ListBox, the default uses the VirtualizingStackPanel. Xaml. We are having wpf user control (UserControl. RowDefinitions> <RowDefinition. 3rd, in the 'Create Style Resource' dialog, specify a key for the ScrollViewer style and click. Of course, you can place your wrap panel inside the scrollviewer. Initially all it's menu items are disabled. ItemsPanel. inside the stackpanel I've some grids and inside the grids there're stackpanels again and some tiles control by MahApps Metro. If I take the stack panel out of the equation and just have the datagrid in the grid, the scrollbars work fine. I want to display a important list of items using an ItemsControl. HorizontalScrollBarVisibility="Auto" ScrollViewer. Windows. In This Section1 Answer. This stackpanel will contain databound images. Set the Height of the RowDefinitions in the "VerticalScrollBar" Style. <ListBox ItemsSource=" {Binding}" ScrollViewer. In the grid layout, the listview displays the sliding bar and the mouse can scroll. Put it into a ScrollViewer. Stackpanel places controls based on PositiveInfinity, which means the size that it can take in positive direction. When you put the ScrollViewer in a StackPanel or Grid with RowHeight="Auto", it will not scroll, as the parent "offered" it any space it requires. The WPF DataGrid provides a lot of functionalities, but also has many limitations and a very steep learning curve. How to: Customize the Thumb Size on a ScrollBar . For the ItemsControl class, the default ItemsPanel value is an ItemsPanelTemplate that specifies a StackPanel. 3. 0. VerticalScrollBarVisibility attached property. 10. 34. 列幅の変更やソートといった機能も標準搭載されているのでわざわざItemsControlをこねくり回して頑張る. The problem here is you use a StackPanel to wrap your DataGrid. Value> <ControlTemplate TargetType=" {x:Type. It turns out the click on the scroll arrows will return: " Microsoft. Here's a screenshot of how it might. Share. I am using the Scrollbars as a way to increase/decrease integer values in the TextBox. The reason why I'm using an ItemsControl is that the DataTemplate is much more complex in the application I'm working on: The sample code provided only reflects the sizing problem I. Override this method to influence the default post-template logic of a class. You can set the Orientation property to Horizontal to stack items from left to right. Make sure that the Grid that contains the RowDefinitions doesn't have a StackPanel as a parent somewhere up in the visual tree and that there are enough items/columns in the DataGrid for the scroll bar(s) to get visible. Hi ya, is there any trick? I've read some old Framework 2. The ListView is trying to virtualize, by default. may be some control is stealing the mousewheel action but I can't feagure out which one. Here, the document is given inline, it is an 800 pixel high StackPanel. Column="0" Orientation="Vertical"> <TextBlock FontSize="30" Text="S. Hide or Show stackpanel of ListViewItem with VisualStateManager. asked on 13 Apr 2011, 05:32 AM. @Lee - Just use ContentPresenter and set its Content property to an instance of your UserControl: contentPresenter. That should solve the weird horizontal scroll bar bug your seeing, and I'll update my post. // give the canvas a name, so you can bind to it mainCanvas. Even if a developer chooses the wrong StackPanel subtype, drag and drop should still work properly in. Row="1" Grid. For StatusBar, the default uses DockPanel. That means, the ScorllViewer is treating each StackPanel as a single content element and scrolling by height of each StackPanel instead of height of each Button within the child StackPanels. It currently just sizes to the height of the controls in the StackPanel (the Add and Remove buttons), and resizes to accomodate items that are added. One option is to use a DockPanel, and dock the ScrollBar to the right and let the Grid fill in the rest: <DockPanel HorizontalAlignment="Stretch. Yeah I've added that stackpanel as a test, replacing it with just a grid appears to have similar results with a slight difference, there is at best 1 pixel when ScrollBar appears, unfortunately not being able to shrink ContentControl issue is still present. <UserControl> <Grid> <ScrollViewer. You can use the Orientation property to specify the direction of the child elements. Visible; sv. Left and Margin. Solution 2. I did using an event: SizeChanged="sizeChanged_ScrollViewer". Data. typeof (ScrollBar) is not valid. You can move the location of the scrollbar using a ControlTemplate. dll" in to another application (ParentApplication) In parent application we have one stackpanel in which we have to add the user control dynamically using the user control constructor. What I want to do is every time the logs change, the ScrollViewer will scroll to the bottom. I add Labels to the StackPanel programmatically. We added the reference of "Child. (Depending on how many controls I add to the Scrollviewer, etc. ScrollViewer Overview For horizontally oriented StackPanel, explicitly putting both the scrollbar visibilities worked for me to get the horizontal scrollbar. I want the ListBox to stretch vertically by anchoring to the bottom of the window. AdvertiseThe idea in WPF is that every component has only its own job and if you want certain behavior, you combine multiple components to create the view you are looking for. However the only parent above the stackpanel that i can use the height of is the scrollviewer itself so maybe that is the problem Here is the code as it stands now in Xamlpad ready code. Try3: The scrollbar will show up if you set the height of the ListView. Make sure your GridView is in a Grid and not a StackPanel. Called. Share. Below is the code. A ScrollBar allows you to view content that is outside of the current viewing area by sliding the Thumb to make the content visible. 96. Header for the top scrolling content. I did using an event: SizeChanged="sizeChanged_ScrollViewer". The problem is that I want it to be left justified within its parent. The answer is always the same. StackPanelSample. Although you can use either xref:System. Windows. Basically I want a 4x4 grid thats scalable but keeps a square (or any other arbitrary) aspect ratio. Look at this: <Grid> <ScrollViewer> <Grid Height="1000" /> </ScrollViewer> <Grid>. RowDefinitions> <RowDefinition Height="12*"/> <RowDefinition Height="77. Make the scroll viewer as a Parent of the stack panel and then add the child elements to the stack panel. From MSDN: Represents the control that displays a header that has a collapsible window that displays content. 3. DockPanel or xref:System. 1 Answer. This was fairly ok actually as the MSDN default Styles and pretty easy to follow. WPF. Content = stack; //now place any thing, no. may be some control is stealing the mousewheel action but I can't feagure out. I tried both of these:I had to make two changes: (1) everywhere that I used to set the attached properties Canvas. 79. Designers generally allow you to create a copy of an existing template and modify it. It's in a StackPanel. Grid. Walkthrough: My first WPF desktop application. When i do that the scroll bar still doesnt work. <ScrollViewer x:Name="PART_ContentHost"/> Instead, you should use a ContentPresenter. This is pretty late, but anyone using ListBox probably shouldn't have it. I'm using only vertical scrollbar, not need horizontal. Oct 16, 2011 at 14:38. Toolkit. (Actually it will also work if you set the height of the TabControl. <UserControl> <Grid> <ScrollViewer. Although you can use either xref:System. I used scrollviewer on 'B': a) on StackPanel spJobsB (containing gb'B' and Expander ) the horizontal scrollviewer appears across this entire row which is undesirable b) on Expander expJobPrefixB (containing Stack Panel of group boxes B-1, B-2,. 次のWPF XAMLでは、ScrollViewerは機能しません(スクロールバーは表示されますが、スクロールできず、コンテンツはウィンドウの一番下まで移動します)。. I have this screen, the user can change the Height, and based on that I want my ScrollViewer to show the scrollbar if needed but it turns to be always the same size. Row="0" Grid. Walkthrough: My first WPF desktop application. <DockPanel> <ScrollViewer> <StackPanel> <!--. Controls. Grid. If the list box is inside a StackPanel, try these steps for your ListBox. to a grid inside your window. Application. Oct 16, 2011 at 14:38. In a WPF desktop application I've got a ListBox that must show the Vertical Scrollbar and Horizontal Scrollbar. ParentApplication contains : MainWindow. Jan 15, 2013 at 21:33. Choose Between StackPanel and DockPanel Create a StackPanel Horizontally or Vertically Align Content in a StackPanel. – Oskar. Connect and share knowledge within a single location that is structured and easy to search. The other, and much better option, would be to get rid of the StackPanel and use another Panel that doesn't measures its child elements with an infinite space. Currently the text gets cut-off at the bottom of the grid and the scrollview doesn't identify when to take effect. What do I need to specify so that the WPF Datagrid has scrollbars? I tried putting the datagrid in a ScrollViewer but that. The figure below illustrates a top-to-bottom layout. The WrapPanel will position each of its child controls next to the other, horizontally (default) or vertically, until there is no more room, where it will wrap to the next line and then continue. To do this, call the VisualTreeHelper. Besides that, all that binding or code behind stuff is entirely redundant. Row="1" attributes in the ScrollViewer instead of in your ItemControl. g. ScrollViewer tells its content, that it has infinite place to fit in, and items always keep their original size and ScrollViewer just crops elements and shows vertical scrollbar if height is too small or leaves blank space if. Solution 2. I have an ItemsControl for which the ItemsSource is Binded. Modified 5 years, 7 months ago. You were very close, just missing 1 key thing, set the scrollViewer's VerticalScrollBarVisibility attached property to Auto or Visibile. You don't need ItemsControl, which be default will put items in vertical StackPanel which gives its children unlimited amount of height to grow. setting MaxHeight for ScrollViewer should solve the issue. Hi Magnus and Andy, I added DockPanel or setted DataGrid in Grid. This is due to the fact that the grid is measured with infinity height. Please refer to my answer here for more information:Once the scrollbars are appearing, then we can clean it up further: Bind the Height of the StackPanel or Grid to the ActualHeight of the parent. How can I make it appear on the left hand side? &lt;ListBox x:Name="MessageListBox"2. How to put it image in WPF stackpanel? problem with Scrollbar in Custom Stackpanel. 5 Answers. Then give a name like TabControlScroller to the ScrollViewer inside the template. Windows. This is because a StackPanel measures its child elements with infinite horizontal space if its Orientation property is set to Horizontal and infinite vertical space if it is set to Vertical. Well, the ListBox in WPF already contains a scroll, which you can force to be visible like this: <ListBox ScrollViewer. If you want to keep the bottom panel always visible with it using as much space as it needs/wants, you should dock the bottom panel and let the othe panel fill the remaining space of the DockPanel unoccupied by the bottom panel. I did find this, but unfortunately it doesn't help. In this event I get the actual height and then reduce the size of the grid: double parentHeight = NewFilesStack. I am currently working on my first WPF project and trying to make a ListView scrollable. but I can't use typeof (Microsoft. You should be "flowing" text (blocks) instead of attempting both horizontal and vertical. VerticalScrollBarVisibility = ScrollBarVisibility. I've reduced the issue to the simplest elements I could below I've tried putting the DataGrid in a separate ScrollViewer but had the same issue. See my edit. First, StackPanel doesn't have a VerticalScrollBarVisibility property. The ScrollBar class in WPF represents a ScrollBar control. My controls placed in 'DockPanel' as below. i coded it as per the below so that it would add the UserControl (showing the different items) to a StackPanel with a horizontal orientation that then contains a wrappanel to wrap the items inside but it is not working. Hi Magnus and Andy, I added DockPanel or setted DataGrid in Grid. When the new data is shown the scroll position is not a the top of the new data. Use ListView as the root of the page and leverage ListView. There are two predefined elements that enable scrolling in WPF applications: ScrollBar and ScrollViewer. This helps the ScrollViewer to use the available space within Grid and if content overflows, it will show scrollbars. How-to Topics. Linking (WPF window) button action to other (WPF window) stackpanel? Expand stackpanel and child controls to fill screen width on various devices. the scrollviewer's controltemplate contains a grid in which the scrollcontentpresenter places the items within a column and row of set size. VirtualizingStackPanel. <Grid> <StackPanel> <Expander> <DataGrid> <Expander> <ListView>. I am trying to get a scrollbar on on a grid for WinRT app with Xaml. For MenuItem, the default uses WrapPanel. In this case you should use an items control and not resort to horrible attached properties which you will end up having a million of for every property you wish to style. Thumb of a xref:System. Add this event SelectionChanged="TabControl_SelectionChanged" to your TabControl. Here is a original question what i want to do. Feb 25, 2011 at 11:09. Content = title; button. 1. Here is the sample XAML:. To compel a panel element to receive focus, set the Focusable property to true. The ItemsControl will have the content of your data and will be wrapped in a StackPanel (by default). Reference. our contributor guide. If you're reluctant to do that, perhaps the StackPanel isn't the right panel for this job. 前置きが長くなったけどWPFには標準でScrollBarとScrollViewerというコントロールが用意されている。. – Arsen Khachaturyan. The WrapPanel will position each of its child controls next to the other, horizontally (default) or vertically, until there is no more room, where it will wrap to the next line and then continue. There are two predefined elements that enable scrolling in WPF applications: ScrollBar and ScrollViewer. This does exactly what we want. However, there is often more text than the amount the window can display, so I need a vertical scroll bar. The scrollviewer will then scroll the larger stackpanel within the smaller grid viewport. – madan. Stack panel is a type of container which can keep on growing as many as children you add into it and provides equal space for each of its children, So the scrollviewer requires a height here to tell the parent to define the space limits; so it can function in its assigned area. Primitives namespace. Button elements that represent the various scrolling methods are docked on the left in a separate StackPanel. I'd suggest for a start to check out the MVVM pattern and how bindings and data templates are applied in WPF rather than attempting to create and assign child controls in code ala WinForms. I assume that this is because unchecking ScrollViewer. Remarks. How-to Topics. Inner ListBox in StackPanel get the height to display all items, so scroll can't be activated, even if those items are not seen on the screen. This doesn’t work that well in our case, as it will also scroll our “Enter stuff in here:” prompt that is within the StackPanel. <ListView> <ListView. Stack panel is a simple and useful layout panel in XAML. This means that in order to get a scroll bar for a panel, you will have to wrap it in a ScrollViewer component. Stackpanel and scrollbar. C# WPF Adding scroll bar in Stackpanel. MakeVisible (Visual visual, Rect rectangle) method by passing in the control you would like as the first parameter, and a Rect with the coordinates to make visible as the second. Template> <ControlTemplate> <ScrollViewer x:Name="ScrollViewer" Padding. By setting CanContentScroll to false, you're telling the ScrollViewer. The buttons which control scrolling are RepeatButton s instead of ordinary Button s. Let's first try a very simple example, much like we did with the WrapPanel: <Window x:Class. Controls. The StackPanel control is a Panel which lays out its children by stacking them horizontally or vertically. So this will enable scrolling inside the TreeView, by mouse and scrollbar: So this will enable scrolling inside the TreeView, by mouse and scrollbar:So in your case the mouse is over the scroll viewer of the tab items area. m_View; Then you don't need to wrap it in a ScrollViewer. The entire grid is already displayed in the ScrollViewer, and the ScorllViewer is clipped so you cannot see the rest of grid. Writing your own code to display data in rows and columns is surprisingly easy, taking only a few dozens of code lines. Linking (WPF window) button action to other (WPF window) stackpanel? Expand stackpanel and child controls to fill screen width on various devices. Will display a vertical scrollbar automatically when required. This ItemsSource is bound to a collection of Grids created at runtime. don't use a StackPanel for layout purposes. Windows. Toolkit. MessageBox instead of a normal WPF window results in creating a non-working scrollbar. Answers. Inside the middle section I put another grid with 2 rows and 2 columns. The outer StackPanel is the issue. 0. It marks the tunneling PreviewMouseWheel event as handled, so as to prevent WPF from raising the bubbling MouseWheel event, which is the one causing the actual scrolling. DockPanel. you can use "ScrollViewer" and "Stackpanel" as main content of "ScrollViewer". The ScrollViewer should hold the StackPanel as Content, and you have to set MaxWidth/MaxHeight on the ScrollViewer beyond which the ScrollBar will show. LS. Also set the Grid. <ScrollViewer VerticalScrollBarVisibility = "Hidden" HorizontalScrollBarVisibility= "Auto" > <StackPanel Orientation = "Horizontal" /> </ScrollViewer> In this case, StackPanel itself is resized when XtraScrollableControl is resized. Assuming you're using winforms, default panel components does not offer you a way to disable the horizontal scrolling components. I am having trouble in adding the scroll bar at the end if the stackpanel or the Grid View in WPF anybody plz help me how can add Scrollbar at the end of the panel no matter of the size of window and when i cange the size of the window it should always appers at the end of window. . Dec 10, 2008 at 15:32. RowDefinitions> <Grid. Right; vScrollBar1. By default the ScrollBar will show up when there is more content than space. This tool can help you/your team maintain a better XAML coding style as well as a much better XAML readability. Implement this method to add class handling for this event. StackPanel - Fill up all remaining space. Most probably your problem comes from the fact, that your listbox resides in a control, which does not delimit it's height, so your listbox has a height that is exactly. . @Lee - Just use ContentPresenter and set its Content property to an instance of your UserControl: contentPresenter. That should force the scroll bar to show up. ScrollViewer Overview. The answer is NO. Virtualizing means, among other things, using logical scroll. I removed the ScrollViewer, and replaces StackPanel with Grid. The hierarchical inheritance of StackPanel class is as follows −. Dock="Bottom", that will ensure the ListView in your first row is constrained in. Set ScrollViewer. – Paul Rohde. Solution 1. To understand why, it helps to think of panels and container controls as containers that have an external size, i. To do this layout properly, in your XAML put the bottom panel before the other (variably sized) panel and. because I put 20 elements to show but there is 12 elements to see without scrollbar. So, you might want to tweak a bit of sample. Controls. My understanding of virtualizing stack panel is as follows: At the top level we have a treeview that contains a scrollviewer. Alignment The FrameworkElement has two alignment properties: HorizontalAlignment and VerticalAlignment. When the WrapPanel uses the Horizontal. So a list control like a grid will be as tall as needed to show all their children. StackPanel does not do UI virtualization, so if you have a lot of items, perf will suffer badly. This concept is widely used to take the advantages of multiple layouts in an application. A click on other area of the scrollbar will return type. My controls placed in 'DockPanel' as below.