/// <summary>
/// Starts a new task for the autocomplete and propagates the result via the <see cref="AutocompleteItemsChanged" /> event.
/// This method does some technical stuff and delegates the actual search to the <see cref="IAutocompleteSource" />.
/// </summary>
/// <param name="searchTerm">The term to search for</param>
public void Search(string searchTerm)
{
string id = Guid.NewGuid().ToString();
IAutocompleteSource autocompleteSource = null;
lock (m_lockObject)
{
autocompleteSource = m_autocompleteSource;
// no source, no search
if (autocompleteSource == null)
{
return;
}
LastId = id;
}
Task.Delay(SearchDelay)
.ContinueWith((prevTask) =>
{
// search only if there was no other request during the delay
if (DoSearchWithId(id))
{
IEnumerable items = autocompleteSource.Search(searchTerm);
// a final check if this result will not be replaced by another active search
if (DoSearchWithId(id))
{
AutocompleteItemsChanged?.Invoke(this, new AutocompleteItemsChangedEventArgs(items));
}
}
});
}
public AutocompleteViewModel()
: base()
{
m_autocompleteSource = new OperatingSystemAutocompleteSource();
m_selectedItem = null;
}
private void AutocompleteSourceChangedHandler(IAutocompleteSource newAutocompleteSource)
{
if (m_autocompleteController != null)
{
m_autocompleteController.AutocompleteSource = newAutocompleteSource;
}
}
private void AutocompleteSourceChangedHandler(IAutocompleteSource newAutocompleteSource, IAutocompleteSource oldAutocompleteSource)
{
if (oldAutocompleteSource != null && oldAutocompleteSource is IAutocompleteSourceChangingItems)
{
((IAutocompleteSourceChangingItems)oldAutocompleteSource).AutocompleteSourceItemsChanged -= AutocompleteSourceItemsChangedHandler;
}
if (newAutocompleteSource != null && newAutocompleteSource is IAutocompleteSourceChangingItems)
{
((IAutocompleteSourceChangingItems)newAutocompleteSource).AutocompleteSourceItemsChanged += AutocompleteSourceItemsChangedHandler;
}
if (m_autocompleteController != null)
{
m_autocompleteController.AutocompleteSource = newAutocompleteSource;
}
}
internal CatalogView(
MoviesGridViewModel data,
IAutocompleteSource directorsAutocompleteSource,
IAutocompleteSource actorsAutocompleteSource)
{
InitializeComponent();
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
var imageColumn = new DataGridViewImageColumn();
var nameColumn = new DataGridViewTextBoxColumn();
var yearColumn = new DataGridViewTextBoxColumn();
imageColumn.ImageLayout = DataGridViewImageCellLayout.Zoom;
dataGridView1.Columns.Add(imageColumn);
dataGridView1.Columns.Add(nameColumn);
dataGridView1.Columns.Add(yearColumn);
imageColumn.Resizable = DataGridViewTriState.False;
nameColumn.Resizable = DataGridViewTriState.False;
yearColumn.Resizable = DataGridViewTriState.False;
imageColumn.ReadOnly = true;
nameColumn.ReadOnly = true;
yearColumn.ReadOnly = true;
editFormYear.SetErrorProvider(editMovieFormErrorProvider);
editFormNameText.SetErrorProvider(editMovieFormErrorProvider);
editFormCountryText.SetErrorProvider(editMovieFormErrorProvider);
editFormDirector.SetSource(directorsAutocompleteSource);
editFormAddActor.SetSource(actorsAutocompleteSource);
editMovieFormHelpProvider.SetShowHelp(editFormNameText, true);
editMovieFormHelpProvider.SetHelpString(editFormNameText, "Название фильма");
data.Changed += UpdateGridView;
UpdateGridView(data);
ShowMovieGrid();
OnCatalogViewResize(null, null);
}
/// <summary>
/// Creates a new <see cref="AutocompleteController" />.
/// </summary>
public AutocompleteController()
{
m_autocompleteSource = null;
m_lastId = null;
}
public ThemChuyenXuViewModel()
: base()
{
_giaodanSource = new GiaoDanAutoCompleteSource();
_selectedGiaoDan = null;
}
public void SetSource(IAutocompleteSource src)
{
source = src;
}
