It appears WindowsFormsHost control is set to display on top. Is there any way to change its z-order to allow other WPF controls on the same window to be visible on top of the WindowsFormsHost control?
Unfortunately no, because of the way the winformshost is composited into a WPF window it must appear on top.
See the z-order paragraph from here.
In a WPF user interface, you can change the z-order of elements to
control overlapping behavior. A hosted Windows Forms control is drawn
in a separate HWND, so it is always drawn on top of WPF elements.
A hosted Windows Forms control is also drawn on top of any Adorner
elements.
You can do a little trick. When you declare an WindowsFormsHost, it's parent is first HWND component. Usually it's root window. So, clip area for controls is whole window. I'll show an example with WPF ScrollViewer.
<Window>
<Grid>
<ScrollViewer Margin="20,50">
<ItemsControl ItemsSource="{StaticResource StringArray}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<WindowsFormsHost>
<wf:Button />
</WindowsFormsHost>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</Grid>
</Window>
In this case Buttons will be out of ScrollViewer bounds. But there's a way to create "intermediate" HWND item to clip WinForms area over ScrollViewer. Just place another WindowsFormsHost with ElementHost like below:
<Grid>
<WindowsFormsHost Margin="20,50">
<ElementHost x:Name="This is a clip container">
<ScrollViewer>
<ItemsControl ItemsSource="{StaticResource StringArray}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<WindowsFormsHost>
<wf:Button />
</WindowsFormsHost>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</ElementHost>
</WindowsFormsHost>
</Grid>
Now clip area for Buttons is ElementHost and WinForms Buttons will be clipped by it on scrolling. Also you can create ControlTemplate for ContentContol and reuse it where you need it.
<ControlTemplate x:Key="ClipContainer" TargetType="{x:Type ContentControl}">
<WindowsFormsHost>
<ElementHost>
<ContentPresenter />
</ElementHost>
</WindowsFormsHost>
</ControlTemplate>
<Grid>
<ContentControl Template="{StaticResource ClipContainer}" Margin="20,50">
<ScrollViewer>
<ItemsControl ItemsSource="{StaticResource StringArray}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<WindowsFormsHost>
<wf:Button />
</WindowsFormsHost>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</ContentControl>
</Grid>
Related
I've got this Grid which contains a TabControl with a number of TabItem.
Each TabItem loads a UserControl.
<Grid>
<TabControl>
<TabItem>
<local:UsersControl/>
</TabItem>
</TabControl>
</Grid>
In this specific UserControl I placed a Grid with nested a DockPanel, left side for menu, right for content.
On the right side are loaded a Border containing a single UserControl relative to the selection on the menu on the left.
<Grid>
<DockPanel>
<Border>
<UserControl Content="{Binding MainDock, UpdateSourceTrigger=PropertyChanged}"/>
</Border>
</DockPanel>
</Grid>
Finally, the UserControl consists of a StackPanel which contains a TextBlock and a ScrollViewver with inside a DataGrid.
<StackPanel>
<TextBlock/>
<ScrollViewer>
<DataGrid>
<!-- datagrid stuff -->
</DataGrid>
</ScrollViewer>
</StackPanel>
The problem consist in the latest StackPanel being bottomless and expanding well over the bottom of the window application, which never activate the ScrollViewer hiding part of the grid data, when there are enough rows.
Any idea how to solve this?
I want to make it so that my TabControl is vertically scrollable, but I can't seem to do it. The following sample acts as though there was no scrollviewer at all. I even tried putting the TabControl inside the scrollviewer, or putting it all in a grid and constraining the height of the grid, but nothing works.
<DataTemplate x:Key="tabControlTemplate">
<TabControl ItemsSource="{Binding guiItems}" DisplayMemberPath="Title" Height="Auto" Template="{StaticResource mainTabControlTemplateEx}">
<TabControl.ContentTemplate>
<DataTemplate>
<ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
<StackPanel Margin="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<ItemsControl ItemsSource="{Binding guiItems }" ItemTemplateSelector="{DynamicResource templateSelector}"/>
</StackPanel>
</ScrollViewer>
</DataTemplate>
</TabControl.ContentTemplate>
</TabControl>
</DataTemplate>
The actual problem is not clear from the question.
You are not getting to see scrollviewer and the content inside is clipped? PLease confirm if that is the case.
If the problem is you are getting to see entire content taking up all the available space, and you would like to control that using scroll viewer, then you would need to set 'MaxHeight' property on Scroll Viewer. This would limit the height of your DataTemplate and would make verticall scroll bar visible if the inner content goes beyond the MaxHeight.
Hope that helps.
This may have been asked, but wasn't able to find the exact question.
Basically I have a WPF Window that I use as a Form. Now for the form, I have a StackPanel that helps keep all the controls and labels in place.
If the user has a smaller resolution display, the window size will be slower so for example 800x600. Some controls get lost.
For this I have added a ScrollViewer wrapped around the StackPanel. But the ScrollViewer never activates. Its probably got something to do with the stackpanel never being limited I suppose. But how can I activate the scroll viewer if the user resizes the window, or the window (when it opens) cannot display all contents properly?
I don't think its necesary to put my xaml here, but if you need it let me know. thanks!
A StackPanel has infinite size (doesn't respect its parent bounds) so you should wrap it in a Grid, which in turn is inside the ScrollViewer.
This may help you
<StackPanel Orientation="Vertical">
<ScrollViewer Name="scrollViewer1">
<DataGrid Name="dgDataList" ItemsSource="{Binding}">
<DataGrid.Columns>
<DataGridTemplateColumn Header="View" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
//control like textblock, image etc
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</ScrollViewer>
<ScrollViewer Name="scrollViewer2" >
<DataGrid Name="dgDataList2" ItemsSource="{Binding}" >
<DataGrid.Columns>
<DataGridTemplateColumn Header="View" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
//control like textblock, image etc
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</ScrollViewer>
</StackPanel>
I ran into a similar problem where the horizontal scrollbar wasn't being displayed even though there was content on the screen that was hidden.
<Window x:Class="WPFTestingPlatform.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="{Binding SystemParameters.PrimaryScreenHeight}"
Width="{Binding SystemParameters.PrimaryScreenWidth}"
ResizeMode="CanResizeWithGrip">
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<StackPanel Width="1248" Height="600">
<TextBlock HorizontalAlignment="Right">Right</TextBlock>
</StackPanel>
</ScrollViewer>
</Window>
Set the window to have the size you would like for your window. Also set the Stackpanel size so it neatly fits all of your content.
The window size isn't as important as setting the StackPanel height/width otherwise the StackPanel will inherit it's size from the window.
You can resize this window and the scrollbars will appear/disappear (if ResizeMode="CanResizeWithGrip" is set). If you do not set HorizontalScrollBarVisibility, the scrollviewer will not display the horizontal scrollbar regardless of the content size.
Suppose you have a StackPanel, which contains a ScrollViewer which contains another StackPanel with an ItemsControl with a bound ItemsSource. This ItemsSource is bound to a collection of Grids created at runtime. Each Grid contains a label and a textbox/combobox/a few checkboxes that all have a unique TabIndex value within the StackPanel.
Here is the xaml:
<ScrollViewer Name="scrollViewer" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<StackPanel Name="stackPanel" MinWidth="500" Width="Auto">
<ItemsControl Name="itemsControl" ItemsSource="{Binding ElementName=SomeWindow, Path=GridsCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</ScrollViewer>
I want to simply tab from one control to the next, but only within the controls in the grids in the grids collection. So far I've tried different KeyboardNavigation.TabNavigation settings but without any luck. What is the best way to do this?
Set TabNavigation to KeyboardNavigationMode.Cycle for each container you want to behave like that, so the focus won't escape it as long as you use Tab and Shift+Tab:
KeyboardNavigation.SetTabNavigation(grid1, KeyboardNavigationMode.Cycle);
If you want to change Ctrl+Tab behaviour, use KeyboardNavigation.SetControlTabNavigation.
You can apply an implicit style that disables tabbing for every Control, then you re-enable it for just what you want to be tab-able:
<ScrollViewer Name="scrollViewer" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<ScrollViewer.Resources>
<Style TargetType="Control">
<Setter Property="IsTabStop" Value="False" />
</Style>
</ScrollViewer.Resources>
<StackPanel Name="stackPanel" MinWidth="500" Width="Auto">
<ItemsControl Name="itemsControl"
ItemsSource="{Binding ElementName=SomeWindow, Path=GridsCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</ScrollViewer>
Don't forget to set IsTabStop on your dynamically generated Grids to True
I have an ItemsControl in my user control with a scroll viewer around it for when it gets too big (Too big being content is larger than the viewable area of the UserControl). The problem is that the grid that it is all in just keeps expanding so that the scroll viewer never kicks in (unless I specify an exact height for the grid). See code below and thanks in advance.
<UserControl x:Class="BusinessObjectCreationWizard.View.TableSelectionPageView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<GroupBox FontWeight="Bold" Height="300px"
Header="Tables"
Padding="2">
<ScrollViewer>
<ItemsControl FontWeight="Normal"
ItemsSource="{Binding Path=AvailableTables}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<CheckBox Content="{Binding Path=DisplayName}"
IsChecked="{Binding Path=IsSelected}"
Margin="2,3.5" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</GroupBox>
</UserControl>
This user control is loaded here
<Border Background="White" Grid.Column="1" Grid.Row="0">
<HeaderedContentControl Content="{Binding Path=CurrentPage}"
Header="{Binding Path=CurrentPage.DisplayName}" />
</Border>
I would like to not specify the height.
If you remove the Height from your GroupBox (which, as far as I understand, is what you want to do), then it will fill its container, unless there's a panel upstream that imposes its own sizing rules.
I used this simplified version of your XAML. I removed the template and the binding, and hard-coded some items, to make this stand alone; those changes won't affect the way layout is done.
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<GroupBox FontWeight="Bold" Header="Tables" Padding="2">
<ScrollViewer>
<ItemsControl FontWeight="Normal">
<TextBlock>Foo</TextBlock>
<TextBlock>Bar</TextBlock>
<TextBlock>Baz</TextBlock>
</ItemsControl>
</ScrollViewer>
</GroupBox>
</Window>
Run it, and you'll see that the content does indeed size to fit the window, and the scrollbar only enables when the window gets too small to see all three items. I believe this is what you want.
So the problem is most likely one of the parent panels, one you're not showing in your sample XAML. The problem you describe could occur if your GroupBox appears inside a StackPanel:
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<StackPanel>
<GroupBox FontWeight="Bold" Header="Tables" Padding="2">
<ScrollViewer>
<ItemsControl FontWeight="Normal">
<TextBlock>Foo</TextBlock>
<TextBlock>Bar</TextBlock>
<TextBlock>Baz</TextBlock>
</ItemsControl>
</ScrollViewer>
</GroupBox>
</StackPanel>
</Window>
Now the GroupBox appears at the top of the Window, sized to exactly fit its contents. If you shrink the Window enough, the GroupBox will be cut off -- because it's sized to fit its content, not its container. This sounds like the problem you're describing.
The reason is that StackPanel asks its children what their ideal height is (based on their content), and uses that height. Without StackPanel (or something similar), the default is to respect the control's VerticalAlignment, and if that's set to the default value of Stretch, then the control is stretched to fill its parent. This means it won't be taller than its parent, which sounds like what you want.
Solution: remove the StackPanel (or whatever else is causing you problems) and use something else. Depending on what you're trying to accomplish, you might have better luck with a DockPanel or a Grid. Hard to tell without knowing more about your layout.
Edit: Okay, it looks like the problem is indeed the HeaderedContentControl parent -- but not directly. HeaderedContentControl isn't a panel, so it doesn't do any layout of its own (and its descendant, GroupBox, doesn't have this same problem). The problem is its default template -- which includes a StackPanel. The good news is, you're free to use a different template, let's say one with a DockPanel instead:
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<HeaderedContentControl>
<HeaderedContentControl.Style>
<Style TargetType="{x:Type HeaderedContentControl}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type HeaderedContentControl}">
<DockPanel>
<ContentPresenter ContentSource="Header" DockPanel.Dock="Top"/>
<ContentPresenter/>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</HeaderedContentControl.Style>
<GroupBox FontWeight="Bold" Header="Tables" Padding="2">
<ScrollViewer>
<ItemsControl FontWeight="Normal">
<TextBlock>Foo</TextBlock>
<TextBlock>Bar</TextBlock>
<TextBlock>Baz</TextBlock>
</ItemsControl>
</ScrollViewer>
</GroupBox>
</HeaderedContentControl>
</Window>
If you leave off the <HeaderedContentControl.Style> part, this reproduces your problem; but with the style in place, it allows the GroupBox to fill its container, so the ScrollViewer will get a scrollbar when you want it to.
If the previous answer doesn't fix the problem, you could also try binding the Width, Height of your grid to the ActualWidth, ActualHeight of your parent UserControl. Something like:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="WpfApplication.UserControl1"
x:Name="UserControl">
<Grid Height="{Binding ElementName=UserControl, Path=ActualHeight}"
Width="{Binding ElementName=UserControl, Path=ActualWidth}" />
In this case you aren't setting an explicit width and height but you are limiting the Grids width/height to the constraints of the UserControl it sits in.
I had the same issue, after reading this response I replaced all StackPanels with Grids in UserControl. It resolved the Scrollbar issue.
Try removing the grid entirely and setting the HorizontalAlignment and VerticalAlignment directly on the GroupBox. If a layoutpanel has only one child, it's often redundant... this migth be true in your case.
If that doesn't work... what's the parent of your grid control?
Why not just use a listbox instead of an itemscontrol, that has a built in scrollviewer.
They are different. If you do not want to have the items selectable, then don't use a ListBox. It is going to be heavier, and will also have the deselect a selection everytime the user clicks on an entry. Just put the ItemsControl in a ScrollViewer
I had the same problema with ListBox, it wasn't expanding and the scroll viewer didn't appear. I solved it as follows:
<UserControl x:Class="TesteView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid MaxHeight="710">
....
....
<StackPanel>
<ListBox MaxHeight="515"
ScrollViewer.HorizontalScrollBarVisibility="Hidden"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ItemsSource="{Binding Path=Teste,Mode=TwoWay}">
....
....
</ListBox>
</StackPanel>
</Grid>
</UserControl>