protected void InitializeViewModel()
{
AppViewModel viewModel = DataContext as AppViewModel;
viewModel.BookVm.LoadDataContact();
var textInput = Observable.FromEventPattern <TextChangedEventHandler, TextChangedEventArgs>(
h => QueryInput.TextChanged += h, h => QueryInput.TextChanged -= h);
var textQuery =
from evt in textInput
let obj = evt.Sender as TextBox
let text = obj.Text
select text;
textQuery.Subscribe(o =>
{
this.SetSearchQueryAndLoad(viewModel, o);
});
}
protected void GenerateLetters()
{
for (char letterFirst = 'A', letterLast = 'Z', i = letterFirst; i <= letterLast; ++i)
{
var definition = new ColumnDefinition();
definition.Width = new GridLength(1, GridUnitType.Star);
AlphabeticGrid.ColumnDefinitions.Add(definition);
var button = new Button();
button.Content = i;
Style default_style = new Style();
default_style.Setters.Add(new Setter {
Property = Control.BackgroundProperty, Value = new SolidColorBrush(Colors.Gray)
});
button.Style = default_style;
button.Name = "Index" + i;
Grid.SetColumn(button, i - letterFirst);
AlphabeticGrid.Children.Add(button);
var buttonClick = Observable.FromEventPattern <RoutedEventHandler, RoutedEventArgs>(h => button.Click += h, h => button.Click -= h);
AppViewModel viewModel = DataContext as AppViewModel;
Style selected = new Style();
selected.Setters.Add(new Setter {
Property = Control.BackgroundProperty, Value = new SolidColorBrush(Colors.White)
});
buttonClick.Subscribe(arg =>
{
Button but = arg.Sender as Button;
if (but == null)
{
return;
}
if (viewModel.BookVm.CurLetterButton != null)
{
if (viewModel.BookVm.CurLetter == but.Content.ToString().ToLower())
{
viewModel.BookVm.CurLetter = "";
viewModel.BookVm.CurLetterButton.Style = default_style;
}
else
{
viewModel.BookVm.CurLetter = but.Content.ToString().ToLower();
viewModel.BookVm.CurLetterButton.Style = default_style;
but.Style = selected;
viewModel.BookVm.CurLetterButton = but;
}
}
else
{
viewModel.BookVm.CurLetter = but.Content.ToString().ToLower();
viewModel.BookVm.CurLetterButton = but;
viewModel.BookVm.CurLetterButton.Style = selected;
}
viewModel.BookVm.LoadDataContact();
});
}
}
public void SetSearchQueryAndLoad(AppViewModel viewModel, string text)
{
viewModel.BookVm.SearchQuery = text;
viewModel.BookVm.LoadDataContact();
}