private void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
SensusDetailPageItem selectedDetailPageItem = e.SelectedItem as SensusDetailPageItem;
if (selectedDetailPageItem != null)
{
Detail = new NavigationPage((Page)Activator.CreateInstance(selectedDetailPageItem.TargetType));
_masterPage.MasterPageItemsListView.SelectedItem = null;
IsPresented = false;
}
}
public SensusMasterDetailPage()
{
_masterPage = new SensusMasterPage();
_masterPage.MasterPageItemsListView.ItemSelected += (sender, e) =>
{
try
{
SensusDetailPageItem selectedDetailPageItem = e.SelectedItem as SensusDetailPageItem;
if (selectedDetailPageItem != null)
{
if (selectedDetailPageItem.TargetType == null)
{
selectedDetailPageItem.Action?.Invoke();
}
else
{
Detail = new NavigationPage((Page)Activator.CreateInstance(selectedDetailPageItem.TargetType));
IsPresented = false;
}
_masterPage.MasterPageItemsListView.SelectedItem = null;
}
}
catch (Exception ex)
{
SensusException.Report("Exception while handling master-detail menu selection: " + ex.Message, ex);
}
};
Master = _masterPage;
// the SensusServiceHelper is not yet loaded when this page is constructed. as a result, we cannot assign the
// ProtocolsPage to the Detail property. instead, just assign a blank content page and show the user the master
// detail list. by the time the user selects from the list, the service helper will be available and the protocols
// page will be ready to go.
Detail = new NavigationPage(new ContentPage
{
Content = new Label
{
Text = "Welcome to Sensus." + Environment.NewLine + "Please select from the menu above.",
FontSize = 30,
HorizontalOptions = LayoutOptions.CenterAndExpand,
VerticalOptions = LayoutOptions.CenterAndExpand,
VerticalTextAlignment = TextAlignment.Center,
HorizontalTextAlignment = TextAlignment.Center
}
});
IsPresented = true;
}
public SensusMasterPage()
{
List <SensusDetailPageItem> detailPageItems = new List <SensusDetailPageItem>();
detailPageItems.Add(new SensusDetailPageItem
{
Title = "Studies",
IconSource = "studies.png",
TargetType = typeof(ProtocolsPage)
});
detailPageItems.Add(new SensusDetailPageItem
{
Title = "Surveys",
IconSource = "surveys.png",
TargetType = typeof(PendingScriptsPage)
});
detailPageItems.Add(new SensusDetailPageItem
{
Title = "Privacy Policy",
IconSource = "privacy.png",
TargetType = typeof(PrivacyPolicyPage)
});
SensusDetailPageItem accountItem = new SensusDetailPageItem
{
Title = "Log In",
IconSource = "account.png"
};
accountItem.Action = () =>
{
if (accountItem.Title == "Log Out")
{
SensusContext.Current.IamRegion = null;
SensusContext.Current.IamAccessKey = null;
SensusContext.Current.IamAccessKeySecret = null;
accountItem.Title = "Log In";
}
else
{
SensusContext.Current.MainThreadSynchronizer.ExecuteThreadSafe(async() =>
{
Input input = await SensusServiceHelper.Get().PromptForInputAsync("Log In", new QrCodeInput(QrCodePrefix.IAM_CREDENTIALS, "Account: ", true, "Please scan your account barcode."), null, true, null, null, null, null, false);
if (input == null)
{
return;
}
string error = null;
string credentials = input.Value?.ToString();
if (string.IsNullOrWhiteSpace(credentials))
{
error = "Empty credentials barcode.";
}
else
{
string[] parts = credentials.Split(':');
if (parts.Length == 3)
{
SensusContext.Current.IamRegion = parts[0];
SensusContext.Current.IamAccessKey = parts[1];
SensusContext.Current.IamAccessKeySecret = parts[2];
}
else
{
error = "Invalid credentials barcode.";
}
}
if (error == null)
{
accountItem.Title = "Log Out";
await SensusServiceHelper.Get().FlashNotificationAsync("Logged in.");
}
else
{
await SensusServiceHelper.Get().FlashNotificationAsync(error);
}
});
}
};
detailPageItems.Add(accountItem);
_masterPageItemsListView = new ListView(ListViewCachingStrategy.RecycleElement)
{
ItemsSource = detailPageItems,
ItemTemplate = new DataTemplate(() =>
{
Grid grid = new Grid {
Padding = new Thickness(5, 10)
};
grid.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(30)
});
grid.ColumnDefinitions.Add(new ColumnDefinition {
Width = GridLength.Star
});
Image image = new Image();
image.SetBinding(Image.SourceProperty, nameof(SensusDetailPageItem.IconSource));
Label label = new Label {
VerticalOptions = LayoutOptions.FillAndExpand
};
label.SetBinding(Label.TextProperty, nameof(SensusDetailPageItem.Title));
grid.Children.Add(image);
grid.Children.Add(label, 1, 0);
return(new ViewCell {
View = grid
});
}),
SeparatorVisibility = SeparatorVisibility.None
};
Icon = "hamburger.png";
Title = "Sensus";
Content = new StackLayout
{
Children = { _masterPageItemsListView }
};
}
