public void Breaking_The_Chain_Should_Assign_Default_Value_To_Target_If_Specified()
{
ResetBinding();
LambdaBinding.BindOneWay(() => Student.School.Address.City, () => schoolCity, "[No City]");
Student.School = null;
Assert.AreEqual("[No City]", schoolCity);
}
/// <summary>
/// Clears the <see cref="Binding"/> property.
/// </summary>
protected void ResetBinding()
{
if (Binding != null)
{
Binding.Dispose();
}
Binding = null;
}
public void One_Way_Binding_Should_Use_Converter_If_Specified()
{
Student student = new Student();
int intValue = 0;
LambdaBinding.BindOneWay(() => student.Name, () => intValue, name => int.Parse(name));
student.Name = "451";
Assert.AreEqual(451, intValue);
}
private void bind(PropertyItem propertyItem, RadioButton btnTopLeft, Anchor anchor)
{
BindingOperations.SetBinding(btnTopLeft, ToggleButton.IsCheckedProperty, LambdaBinding.New(
new Binding("Value")
{
Source = propertyItem, Mode = propertyItem.IsReadOnly ? BindingMode.OneWay : BindingMode.TwoWay
},
(object source) => { return((Anchor)source == anchor); },
(bool source) => { return(source ? anchor : Binding.DoNothing); }
));
}
public FrameworkElement ResolveEditor(PropertyItem propertyItem)
{
BindingOperations.SetBinding(ctCombo, ComboBox.SelectedItemProperty, LambdaBinding.New(
new Binding("Value")
{
Source = propertyItem, Mode = propertyItem.IsReadOnly ? BindingMode.OneWay : BindingMode.TwoWay
},
(ExtraPropertyId source) => { return(App.DataSources.FirstOrDefault(d => d.PropertyId.Equals(source))); },
(DataSourceInfo source) => { return(source == null ? null : source.PropertyId); }
));
return(this);
}
public void Updates_Should_Work_Both_Ways()
{
var binding = LambdaBinding.BindTwoWay(
() => FirstStudent.Name,
() => SecondStudent.Name);
FirstStudent.Name = "Peter";
Assert.AreEqual("Peter", SecondStudent.Name);
SecondStudent.Name = "Parker";
Assert.AreEqual("Parker", FirstStudent.Name);
}
public FrameworkElement ResolveEditor(PropertyItem propertyItem)
{
BindingOperations.SetBinding(textbox, TextBox.TextProperty, LambdaBinding.New(
new Binding("Value")
{
Source = propertyItem, Mode = propertyItem.IsReadOnly ? BindingMode.OneWay : BindingMode.TwoWay
},
(Filename source) => { return((string)source); },
(string source) => { return((Filename)source); }
));
_expression = textbox.GetBindingExpression(TextBox.TextProperty);
return(this);
}
public void Two_Way_Value_Conversion_Should_Be_Applied()
{
var binding = LambdaBinding.BindTwoWay(
() => FirstStudent.Age,
() => SecondStudent.Name,
i => i.ToString(),
n => int.Parse(n));
FirstStudent.Age = 25;
Assert.AreEqual("25", SecondStudent.Name);
SecondStudent.Name = "30";
Assert.AreEqual(30, FirstStudent.Age);
}
public IBinding BindOneWay <TSource, TTarget>
(
Expression <Func <TSource> > source,
Expression <Func <TTarget> > target,
Func <TSource, TTarget> converter = null,
TTarget defaultValue = default(TTarget)
)
{
var key = new BindingKey(target.MemberInfo());
var binding = new LambdaBindingProxy(LambdaBinding.BindOneWay(source, target, converter, defaultValue));
if (!Bindings.Value.TryAdd(key, binding))
{
binding.Dispose();
throw new InvalidOperationException(string.Format("Свойство {0} уже подписано на обновления", key.Name));
}
return(binding);
}
public static IEnumerable <TItem> ShowCheckList <TItem>(Window owner, IEnumerable <CheckListItem <TItem> > items, string prompt, string okButton, string[] columnTitles, string promptSure = null)
{
var wnd = new CheckListWindow()
{
Owner = owner
};
wnd.ctPrompt.Text = prompt;
wnd.ctOkBtn.Text = okButton;
wnd.ctCancelBtn.Text = App.Translation.Prompt.Cancel;
for (int i = 0; i < columnTitles.Length; i++)
{
wnd.ctGrid.Columns[i + 1].Header = columnTitles[i];
wnd.ctGrid.Columns[i + 1].Visibility = Visibility.Visible;
if (i != columnTitles.Length - 1) // mark all columns except for the last one as auto width
{
wnd.ctGrid.Columns[i + 1].Width = DataGridLength.Auto;
}
}
wnd._promptSure = promptSure;
wnd._promptSureYes = okButton.Replace('_', '&');
wnd._checkItems = new ObservableCollection <CheckListItem>(items);
wnd.ctGrid.ItemsSource = wnd._checkItems;
BindingOperations.SetBinding(wnd.chkSelectAll, CheckBox.IsCheckedProperty, LambdaBinding.New(
new Binding {
Source = wnd._checkAll, Path = new PropertyPath("Value")
},
(bool?checkAll) => checkAll,
(bool?checkAll) => { wnd.setAllCheckboxes(checkAll); return(checkAll); }
));
if (wnd.ShowDialog() != true)
{
return(Enumerable.Empty <TItem>());
}
return(wnd._checkItems.OfType <CheckListItem <TItem> >().Where(cli => cli.IsChecked).Select(cli => cli.Item));
}
public LambdaBindingProxy(LambdaBinding binding)
{
Contract.Requires <ArgumentNullException>(binding != null);
_binding = binding;
}
/// <summary>
/// Inits the <see cref="Binding"/> property. The default implementation
/// registers a binding that updates the student's <see cref="Student.SchoolCity"/>
/// with the <see cref="Address.City"/> of the student's school's address.
/// </summary>
protected virtual void CreateBinding()
{
Binding = LambdaBinding.BindOneWay(() => Student.School.Address.City, () => Student.SchoolCity);
}
/// <summary>
/// Inits the <see cref="Binding"/> property. The default implementation
/// registers a binding that updates the student's <see cref="Student.SchoolCity"/>
/// with the <see cref="Address.City"/> of the student's school's address.
/// </summary>
protected virtual void CreateBinding()
{
Binding = LambdaBinding.BindOneWay(() => Student.School.Address.City, () => Student.SchoolCity);
}
/// <summary>
/// Clears the <see cref="Binding"/> property.
/// </summary>
protected void ResetBinding()
{
if (Binding != null)
{
Binding.Dispose();
}
Binding = null;
}