I want to add a button to the pivot header so that it is shown in-line with pivot item titles, but doesn't update the content shown but just launches an event instead.
After some experimenting, I discovered how to do this. First place a button inside a PivotItem's header. Set it up to route tap events as well as click events.
<PivotItem>
<PivotItem.Header>
<Button
x:Name="MyButton"
Tapped="PivotItem_Tapped"
Click="MyButton_Click">MyButton</Button>
</PivotItem.Header>
</PivotItem>
Then inside the handler for the tap, consume the tap event. Clicking on the button won't update the pivot's content now:
private void MyButton_Click(object sender, RoutedEventArgs e)
{
//do whatever you need.
}
private void PivotItem_Tapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
{
e.Handled = true;
}
Related
I'm trying to go to another page when clicking a button. How could i do this.
I tried using a NavigationViewItem but it didn't work.
The NavigationViewItem you posted is used in UWP.
If it is a WinUI3 project, then you need to refer to this document, use Navigate.
the relevant code samples are as follows.
xaml
<Button x:Name="myButton" Click="myButton_Click"/>
xaml.cs
private void myButton_Click(object sender, RoutedEventArgs e)
{
Frame rootFrame = new Frame();
this.Content = rootFrame;
rootFrame.Navigate(typeof(BlankPage1), null);
}
I have a listview with data I don't know. I would like to delete a line after I press a button. The button is in the of the listview.
My code:
Xaml:
<MenuItem Clicked="SupprimerPoste_Clicked" CommandParameter="{Binding .}" />
my List:
public static ObservableCollection<Data> listePosteNoteFrais = new ObservableCollection<Data>();
App.listePosteNoteFrais.Add(new Data { Numero = Label_Numero.Text, ... });
event button:
private void SupprimerPoste_Clicked(object sender, EventArgs e)
{
var menuItem = ((MenuItem)sender);
Data delete ((Data)menuItem.CommandParameter
App.listePosteNoteFrais.Remove(delete);
}
So you can try to remove the item in the data list in the clicked event of the button. You can check the following case which shows how to delete the item in the listview.
Case:How to remove an item from a Xamarin Forms ListView?
In addition, you can check the official document about how to use the observable collection as the listview's item resource.
Official document:https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/listview/data-and-databinding
I have created a content dialog for my UWP app which involves a centralized UI Element and a surrounding blank area.But content dialog does not have a property like "IsLightDismissEnabled" to close the dialog on click on an area except the UIELEMENT area.How can I achieve it?
In the code behind your content dialog:
public sealed partial class CustomDialog : ContentDialog
{
public CustomDialog()
{
this.InitializeComponent();
Boolean isHide;
Window.Current.CoreWindow.PointerPressed += (s, e) =>
{
if (isHide)
Hide();
};
PointerExited += (s, e) => isHide = true;
PointerEntered += (s, e) => isHide = false;
}
}
There are few options that I can think of:
Use popup (like uruk suggested) and add your controls inside, create the popup at desired location (you could also use binding here if you want to show the popup at location depending on user input at runtime Popup has HorizontalOffset and VerticalOffset properties)
Create a parent view that is taking up the whole page but is transparent, then add your UI elements at the center and attach tap/click events to the transparent view. These events are going to just close remove/collapse the transparent view which contains the other elements inside (Either by binding of values or by setting the values to the UI elements).
Example or popup usage:
<Popup x:Name="MenuPopUp"
IsLightDismissEnabled="True"
HorizontalOffset="{Binding HorizontalOffset}"
VerticalOffset="{Binding VerticalOffset}"
IsOpen="{Binding IsOpen, Mode=TwoWay}">
<Grid>
YOUR ELEMENTS HERE
</Grid>
</Popup>
Content dialog is a modal dialog. Why don't you use a Popup or a child class of it? It's non-modal, and it already has the IsLightDismissEnabled property you just mentioned.
<Popup x:Name="MenuPopUp"
IsLightDismissEnabled="True"
LostFocus="MenuPopUp_LostFocus"/>
In CS
private void MenuPopUp_LostFocus(object sender, RoutedEventArgs e)
{
MenuPopup.IsOpen = false;
}
I want to prevent the ability to deselect a list view item if it is already selected. Therefore how do I prevent right mouse click ability to deselect an item?
I have prevented the ability to deselect via swiping by using IsSwipeEnabled="False" on the List View. I didn't require swipe ability on the list view.
I'm happy to completely prevent right mouse click on the list view items if needed.
If I am reading your question correctly, it sounds like you want the ability for the user to select items, but to not be able to de-select. If that is the case, it seems like a strange requirement - it goes against normal UI convention and does something that the user is not expecting.
Having said that, you can do so by handling the SelectionChanged event in the ListView.
When the event is triggered, it gives you a list of removed (de-selected) items. You then just need to add those items back into the ListView's selected items list:
private void itemListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
foreach (var item in e.RemovedItems)
{
itemListView.SelectedItems.Add(item);
}
}
Note that if you use the above code, you do not have to handle any swipe or mouse events.
Edit - Per OP's comment, the requirement is slightly different than what I thought:
I want the selected item to deselect if a different item is selected. however what I dont want is an already selected item to be (manually) deselected
Assuming that you have a single select ListView, you can still use the SelectionChanged event and the SelectionChangedEventArgs to do what you are asking for:
private void itemListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.RemovedItems.Count > 0 && e.AddedItems.Count == 0)
{
var removed = e.RemovedItems[0];
itemListView.SelectedItem = removed;
}
}
I have found a simple solution on the following forum.
You simply add a RightTapped event to the ListView DataTemplate content.
<ListView>
<ListView.ItemTemplate>
<DataTemplate>
<ContentPresenter RightTapped="daves_RightTapped" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
And then in the code behind:
private void daves_RightTapped(object sender, Windows.UI.Xaml.Input.RightTappedRoutedEventArgs e)
{
e.Handled = true;
}
This works fine on an outlook style ListView.
I have a list of customers with various pieces of information. I have a list box with their names. When I select an entry I see more information about the customer on the screen. I want to "Navigate To" another screen when clicking on the user's name with more of their information. I can't figure out how to pass information about the entry to the next screen to accomplish this.
Here is the list box that the user chooses from to begin with.
<ListBox x:Name="scheduleListBox"
ItemTemplate="{DynamicResource ItemTemplate}"
ItemsSource="{Binding Collection}"
Margin="8,8,8,0"
Style="{DynamicResource ListBox-Sketch}"
Height="154"
VerticalAlignment="Top"/>
Here is the TextBlock that could be clicked to go to the other screen. It is changed based on what the user selected from the ListBox.
<TextBlock Text="{Binding Customer}"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Width="150" Margin="104,0,0,0"
Style="{DynamicResource BasicTextBlock-Sketch}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<pi:NavigateToScreenAction TargetScreen="V02Screens.Customer_Status"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBlock>
I'm kind of hoping that there is something I can do in Expression Blend 4 or in the XAML.
In Windows 8, you can pass the entire object to the receiving page.
Like this:
// main page
private void ListBox_SelectionChanged_1
(object sender, SelectionChangedEventArgs e)
{
var _Item = (sender as ListBox).SelectedItem;
Frame.Navigate(typeof(MainPage), _Item);
}
// detail page
protected override void OnNavigatedTo(NavigationEventArgs e)
{
this.DataContext = e.Parameter;
}
In WPF & SL, you can save reference to the SelectedItem in your View Model.
// main page
private void ListBox_SelectionChanged_1
(object sender, SelectionChangedEventArgs e)
{
var _Item = (sender as ListBox).SelectedItem;
MyModel.SelectedItem = _Item;
// TODO: navigate
}
// detail page
protected override void OnNavigatedTo(NavigationEventArgs e)
{
this.DataContext = MyModel.SelectedItem;
}
I hope this helps.
In WPF you can supply an object to the Navigate command which contains anything you want, including whatever data you might want to show on the next page. Then on the target page (the one you navigate to), you have to handle the load completed event.
In your first page you might navigate with...
this.NavigationService.Navigate( somePage, someContainerObject );
Then you might retrieve it on somePage with...
// Don't forget to subscribe to the event!
this.NavigationService.LoadCompleted += new LoadCompletedEventHandler(container_LoadCompleted);
...
void container_LoadCOmpleted( object sender, NavigationEventArgs e)
{
if( e.ExtraData != null )
// cast e.ExtraData and use it
}