Implémentation de "User Dialogs" pour Windows phone 8, Windows 8 et Xamarin pour Windows
Voici un exemple d'implémentation du plugin UserDialogs pour la plateforme Windows.
L'auteur du plugin a indiqué qu'il ne supportera pas Windows 8. Il préfère se concentrer sur le développement du plugin pour Windows 10.
ConfirmAsync
public async Task<bool> ConfirmAsync(string message, string title = null, string okText = "OK", string cancelText = "Cancel")
{
var messgeDialog = new MessageDialog(message, title);
messgeDialog.Commands.Add(new UICommand(okText));
messgeDialog.Commands.Add(new UICommand(cancelText));
messgeDialog.DefaultCommandIndex = 0;
messgeDialog.CancelCommandIndex = 1;
var result = await messgeDialog.ShowAsync();
if (result.Label.Equals(okText))
{
return true;
}
else
{
return false;
}
}
AlertAsync
public async Task AlertAsync(string message, string title = null, string okText = "OK")
{
var md = new MessageDialog(message, title);
await md.ShowAsync();
}
PromptAsync
public async TaskPromptAsync(string message, string title = null, string okText = "OK", string cancelText = "Cancel", string placeholder = "", bool secure = false) { var dialog = new PromptDialog(message, placeholder); var result = await dialog.ShowAsync(); if (result != null) { return result; } else { return new PromptResult() { Ok = false }; } }
PromptDialog.cs
using Acr.XamForms.UserDialogs;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.System;
using Windows.UI;
using Windows.UI.Core;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
public class PromptDialog
{
private TaskCompletionSource _taskCompletionSource;
private TextBlock _titleTextBlock;
private TextBox _contentTextBlock;
private Popup _popup;
private bool _isPhone;
public PromptDialog(string title, string placeHolderMessage, bool isPhone = false)
{
Title = title;
PlaceHolderMessage = placeHolderMessage;
_isPhone = isPhone;
HeaderBrush = new SolidColorBrush(Colors.Black);
}
public string PlaceHolderMessage { get; set; }
public Brush HeaderBrush { get; set; }
public string Title { get; set; }
public IAsyncOperation ShowAsync()
{
_popup = new Popup { Child = DrawPopup() };
if (_popup.Child != null)
{
SubscribeEvents();
_popup.IsOpen = true;
}
return AsyncInfo.Run(WaitForInput);
}
private Task WaitForInput(CancellationToken token)
{
_taskCompletionSource = new TaskCompletionSource();
token.Register(OnCanceled);
return _taskCompletionSource.Task;
}
private Grid DrawPopup()
{
var content = Window.Current.Content as FrameworkElement;
if (content == null)
{
// The dialog is being shown before content has been created for the window
Window.Current.Activated += OnWindowActivated;
return null;
}
double width = Window.Current.Bounds.Width;
double height = Window.Current.Bounds.Height;
var rootPanel = new Grid { Width = width, Height = height };
var overlay = new Grid { Background = new SolidColorBrush(Colors.Black), Opacity = 0.2D };
rootPanel.Children.Add(overlay);
var dialog = new Grid { VerticalAlignment = VerticalAlignment.Center };
dialog.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
dialog.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
dialog.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
dialog.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
dialog.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });
dialog.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
rootPanel.Children.Add(dialog);
var titleBorder = new Border { Background = HeaderBrush, Height = 70 };
Grid.SetColumnSpan(titleBorder, 3);
dialog.Children.Add(titleBorder);
// Title
_titleTextBlock = new TextBlock();
_titleTextBlock.Text = Title;
_titleTextBlock.FontSize = _isPhone ? 16 : 24;
_titleTextBlock.Foreground = new SolidColorBrush(Colors.White);
_titleTextBlock.Margin = new Thickness(0, 0, 0, 20);
_titleTextBlock.VerticalAlignment = VerticalAlignment.Bottom;
Grid.SetColumn(_titleTextBlock, 1);
dialog.Children.Add(_titleTextBlock);
var infoBorder = new Border { Background = new SolidColorBrush(Colors.White) };
Grid.SetRow(infoBorder, 1);
Grid.SetColumnSpan(infoBorder, 3);
Grid.SetRowSpan(infoBorder, 2);
dialog.Children.Add(infoBorder);
var grid = new Grid { MinHeight = 120 };
Grid.SetRow(grid, 1);
Grid.SetColumn(grid, 1);
dialog.Children.Add(grid);
StackPanel informationPanel = new StackPanel();
informationPanel.Margin = new Thickness(0, 20, 0, 30);
// informationPanel.Width = 456D;
Grid.SetColumn(informationPanel, 1);
Grid.SetRow(informationPanel, 1);
// Content Textbox
_contentTextBlock = new TextBox();
_contentTextBlock.Text = PlaceHolderMessage;
_contentTextBlock.BorderBrush = new SolidColorBrush(Colors.Black);
_contentTextBlock.Margin = new Thickness(0, 20, 0, 4);
informationPanel.Children.Add(_contentTextBlock);
grid.Children.Add(informationPanel);
// Buttons
StackPanel stButtons = new StackPanel()
{
Orientation = Orientation.Horizontal,
HorizontalAlignment = HorizontalAlignment.Right,
Margin = new Thickness(0, 0, 0, 20)
};
Button cancelButton = new Button();
cancelButton.BorderThickness = new Thickness();
cancelButton.Padding = new Thickness(10, 5, 10, 5);
cancelButton.Content = "Cancel";
cancelButton.Foreground = new SolidColorBrush(Colors.White);
cancelButton.Background = new SolidColorBrush(Colors.DarkGray);
cancelButton.MinWidth = 90D;
cancelButton.Click += (cancelSender, cancelArgs) => OnCanceled();
stButtons.Children.Add(cancelButton);
Button okButton = new Button();
okButton.BorderThickness = new Thickness();
okButton.Padding = new Thickness(10, 5, 10, 5);
okButton.Content = "OK";
okButton.Foreground = new SolidColorBrush(Colors.White);
okButton.Background = new SolidColorBrush(Colors.Black);
okButton.MinWidth = 90D;
okButton.Click += (okSender, okArgs) => OnCompleted();
stButtons.Children.Add(okButton);
Grid.SetColumn(stButtons, 1);
Grid.SetRow(stButtons, 2);
dialog.Children.Add(stButtons);
return rootPanel;
}
private void PasswordTextBoxOnKeyUp(object sender, KeyRoutedEventArgs keyRoutedEventArgs)
{
if (keyRoutedEventArgs.Key == VirtualKey.Enter)
{
OnCompleted();
}
}
///
/// adjust for different view states
///
///
///
private void OnWindowSizeChanged(object sender, WindowSizeChangedEventArgs e)
{
if (_popup.IsOpen == false) return;
var child = _popup.Child as FrameworkElement;
if (child == null) return;
child.Width = e.Size.Width;
child.Height = e.Size.Height;
}
private void OnInputHiding(InputPane sender, InputPaneVisibilityEventArgs args)
{
var child = _popup.Child as FrameworkElement;
if (child == null) return;
child.Margin = new Thickness(0);
}
private void OnKeyDown(object sender, KeyRoutedEventArgs e)
{
if (e.Key == VirtualKey.Escape)
{
OnCanceled();
}
}
private void OnWindowActivated(object sender, WindowActivatedEventArgs windowActivatedEventArgs)
{
Window.Current.Activated -= OnWindowActivated;
SubscribeEvents();
_popup.Child = DrawPopup();
_popup.IsOpen = true;
}
private void OnCompleted()
{
UnsubscribeEvents();
var result = new PromptResult();
result.Ok = true;
result.Text = _contentTextBlock.Text;
_popup.IsOpen = false;
_taskCompletionSource.SetResult(result);
}
private void OnCanceled()
{
UnsubscribeEvents();
// null to indicate dialog was canceled
PromptResult result = null;
_popup.IsOpen = false;
_taskCompletionSource.SetResult(result);
}
private void SubscribeEvents()
{
Window.Current.SizeChanged += OnWindowSizeChanged;
Window.Current.Content.KeyDown += OnKeyDown;
var input = InputPane.GetForCurrentView();
input.Hiding += OnInputHiding;
}
private void UnsubscribeEvents()
{
Window.Current.SizeChanged -= OnWindowSizeChanged;
Window.Current.Content.KeyDown -= OnKeyDown;
var input = InputPane.GetForCurrentView();
input.Hiding -= OnInputHiding;
}
}
}
