public MainPageViewModel()
{
Notes = new ObservableCollection <NoteModel>();
SaveNoteCommand = new Command(() =>
{
Notes.Add(new NoteModel {
Text = NoteText
});
NoteText = string.Empty;
},
() => !string.IsNullOrEmpty(NoteText));
EraseNotesCommand = new Command(() => Notes.Clear());
NoteSelectedCommand = new Command(async() =>
{
if (SelectedNote is null)
{
return;
}
var detailViewModel = new DetailPageViewModel
{
NoteText = SelectedNote.Text
};
await Application.Current.MainPage.Navigation.PushAsync(new DetailPage(detailViewModel));
SelectedNote = null;
});
}
public DetailPage(DetailPageViewModel viewModel)
{
BindingContext = viewModel;
Title = "Notes Detail";
BackgroundColor = Color.PowderBlue;
var textLabel = new Label
{
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.CenterAndExpand
};
textLabel.SetBinding(Label.TextProperty, nameof(DetailPageViewModel.NoteText));
var exitButton = new Button
{
Text = "Pop",
VerticalOptions = LayoutOptions.Center,
Margin = new Thickness(20),
BackgroundColor = Color.Red,
TextColor = Color.White,
FontSize = 20
};
exitButton.SetBinding(Button.CommandProperty, nameof(DetailPageViewModel.ExitCommand));
var stackLayout = new StackLayout
{
Margin = new Thickness(20, 40)
};
stackLayout.Children.Add(textLabel);
stackLayout.Children.Add(exitButton);
Content = stackLayout;
}
public MainPageViewModel()
{
Notes = new ObservableCollection <NoteModel>();
SaveNoteCommand = new Command(() =>
{
Notes.Add(new NoteModel
{
Id = Guid.NewGuid().ToString(),
Text = NoteText,
Title = Common.createTitle(NoteText),
Timestamp = DateTime.Now,
Time = DateTime.Now.ToString("dd MMM yyyy")
});
NoteText = string.Empty;
},
() => !string.IsNullOrEmpty(NoteText));
NoteSelectedCommand = new Command(async() =>
{
if (SelectedNote is null)
{
return;
}
var detailViewModel = new DetailPageViewModel
{
NoteText = SelectedNote.Text,
Notes = Notes,
Id = SelectedNote.Id
};
await Application.Current.MainPage.Navigation.PushAsync(new DetailPage(detailViewModel));
SelectedNote = null;
});
}
public DetailPage(DetailPageViewModel viewModel)
{
BindingContext = viewModel;
Title = "Notes Detail";
BackgroundColor = Color.PowderBlue;
var noteEditor = new Editor
{
Placeholder = "Enter Note",
BackgroundColor = Color.White,
Margin = new Thickness(2)
};
noteEditor.SetBinding(Editor.TextProperty, nameof(DetailPageViewModel.NoteText));
var saveButton = new Button
{
Text = "Save",
VerticalOptions = LayoutOptions.Center,
Margin = new Thickness(2),
BackgroundColor = Color.Green,
TextColor = Color.White
};
saveButton.SetBinding(Button.CommandProperty, nameof(DetailPageViewModel.SaveCommand));
var deleteButton = new Button
{
Text = "Delete",
VerticalOptions = LayoutOptions.Center,
Margin = new Thickness(10),
BackgroundColor = Color.Red,
TextColor = Color.White
};
deleteButton.SetBinding(Button.CommandProperty, nameof(DetailPageViewModel.DeleteCommand));
var grid = new Grid
{
Margin = new Thickness(20, 40),
ColumnDefinitions =
{
new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Star)
},
new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Star)
}
},
RowDefinitions =
{
new RowDefinition {
Height = new GridLength(4, GridUnitType.Star)
},
new RowDefinition {
Height = new GridLength(1, GridUnitType.Star)
},
}
};
grid.Children.Add(noteEditor, 0, 0);
Grid.SetColumnSpan(noteEditor, 2);
grid.Children.Add(saveButton, 0, 1);
grid.Children.Add(deleteButton, 1, 1);
Content = grid;
}
