I want to implement an horizontal ListView which can have multiple lines, like the file explorer:
I found that I have to use StackPanelfor the ItemPanelTemplate here, but I prefer to have multiple lines instead of the horizontal scrollbar.
I think that the idea is when the StackPanel width reaches the ListView width, go the next line/create a new StackPanel. I don't know if it's correct, but maybe it can help to understand what am I looking for.
How can I implement this?
You need to use a WrapPanel instead of a StackPanel as ItemsPanelTemplate.
<ListView ItemsSource="{Binding xxx}">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
Use a WrapPanel and specify the width.
<ListView ItemsSource="your-source">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel width="1200" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
Related
Can't find a solution to a pretty simple UI problem:
I have a model with a Images property. The Images property holds a collection of items Image.
As for now on - I have a ListBox and binding a ListBoxItem data template to Images.Image and all good. But I have each item on a new line. Not good.
What I am willing to achieve is, lets describe as, a Listbox with Horizontal items orientation and limit of items in a row. Just like Large icons view style in Windows Explorer.
Have somebody previously implemented such a solution? Any advice will be highly appreciated.
Thank you in advance.
Use a WrapPanel (or some other appropriate Panel) as the ListBox's ItemsPanel, and disable horizontal scrolling:
<ListBox ItemsSource="{Binding Images}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding}" Width="100" Margin="5"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
You can set the ListBox's ItemPanelTemplate to WrapPanel, like this.
I am not sure why it is always like that - but as soon as I asked, I have found an alternative solution with usage of ListView:
<ListView ItemsSource="{Binding Images}">
<ListView.ItemTemplate>
<DataTemplate>
<Image Source="{Binding Image}" />
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="2" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
I have a WPF MVVM application with an itemscontrol. The number of horizontal child items is influenced by the itemscontrol width. There is only 1 thing i haven't solved. I'm trying to align the child elements in a way that there are always centered. I have made quick pictures in paint to demonstrate what i mean.
How it's now:
If the width further inceares then a forth item will be added horizontally. This function needs to stay.
How I would like to see it:
If there is enough room for a forth item then it needs to be added. I'm thinking that the answer could be a simple XAML property. Anybody an idea?
Put the ItemsControl in a Grid and set its HorizontalAlignment to Center:
<Grid>
<ItemsControl ItemsSource="{Binding Images}" HorizontalAlignment="Center">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Source="{Binding}" .../>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
I have a ListView in WPF. I have an ObservableCollection as the ItemsSource. I want the items to simply flow from left to right and then onto the next row left to right etc. Image a Windows Explorer in Large Icon mode where you see the folders and files as large icons in a grid.
I am using a third party component that is based on the ListView, so I have to use ListView methods to make this work.
How do I do it?
Update: Here is my code using the answer given:
<diag:NodeListView Name="nodeListViewSources" Width="400" Margin="0,0,0,0" Background="Gray" SelectionMode="Single" SelectionChanged="nodeListView_SelectionChanged">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</diag:NodeListView>
The NodeListView is a third party class derived from a ListView. Maybe that is the problem, but I thought it should work the same.
You just need to change the items' panel to a WrapPanel.
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal"></WrapPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
I was able to get a hold of the third party component vendor. Turns out I also needed to add the following:
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
This along with the WrapPanel worked. Thanks to all...
I am trying to get an alternate row color effect on a Listbox / wrappanel. However since the orientation is Horizontal, The alternate columns are getting the alternate colors. I want the elements to be listed side ways and then wrapped. How can I set the alternate color on rows based on this.
<ListBox ItemsSource="{Binding MySource}" ItemContainerStyle="{StaticResource alternatingListItemStyle}" AlternationCount="2">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" MaxWidth="300"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox Content="{Binding MyCaption}"/>
</DataTemplate>
</ListBox.ItemTemplate>
The possible reason for alternating color for columns is the 'MaxWidth'.
As the MaxWidth for WrapPanel is 300, it's possible to hold more than one item.
If you reduce the maxwidth, it may hold a single item.
Hope this helps.
(Can you explain why you are using a wrap panel in ItemsPanelTemplate?
I am not sure how you want the output to look like.)
What must I do to use a DataTemplate in a WrapPanel or StackPanel?
On a ListBox its so easy but i cant find a way to do it on a Panel...
Edit: What i want is a ListBox that places the items like a WrapPanel.
If I understand you correctly, you can use the ItemsPanel property of your container. I used something similar to make my ItemsControl layout using a horizontal StackPanel:
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
So, more specifically for your case:
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
There isn't a DataTemplate property for those panels..
You can however use a ControlTemplate for these panels, and set these in the Template property of these panels...
HTH