/// <summary> /// Handles the button click on the ok button /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnOk_Click(object sender, RoutedEventArgs e) { Button btnOk = (Button)sender; ListView filterListView = (ListView)btnOk.Tag; // navigate up to the header to obtain the filter property name GridViewColumnHeader header = (GridViewColumnHeader)UIHelpers.FindElementOfTypeUp(filterListView, typeof(GridViewColumnHeader)); SortableGridViewColumn column = (SortableGridViewColumn)header.Column; String currentFilterProperty = column.SortPropertyName; var items = new List <FilterItem>(); foreach (object o in filterListView.Items) { var item = (FilterItem)o; if (item.IsChecked) { items.Add(item); } } if (items.Exists(i => i.ItemView.Equals("Clear"))) { if (currentFilters.ContainsKey(currentFilterProperty)) { FilterStruct filter = (FilterStruct)currentFilters[currentFilterProperty]; filter.button.ContentTemplate = (DataTemplate)dictionary["filterButtonInactiveTemplate"]; if (FilterButtonInactiveStyle != null) { filter.button.Style = FilterButtonInactiveStyle; } currentFilters.Remove(currentFilterProperty); } ApplyCurrentFilters(); } else { // find the button and apply the active style Button button = (Button)UIHelpers.FindVisualElement(header, "filterButton"); button.ContentTemplate = (DataTemplate)dictionary["filterButtonActiveTemplate"]; if (FilterButtonActiveStyle != null) { button.Style = FilterButtonActiveStyle; } AddFilters(currentFilterProperty, items.ToArray(), button); ApplyCurrentFilters(); } // navigate up to the popup and close it Popup popup = (Popup)UIHelpers.FindElementOfTypeUp(filterListView, typeof(Popup)); popup.IsOpen = false; }
/// <summary> /// Handles the selection change event from the filter popup /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void SelectionChangedHandler(object sender, SelectionChangedEventArgs e) { // obtain the term to filter for ListView filterListView = (ListView)sender; FilterItem filterItem = (FilterItem)filterListView.SelectedItem; // navigate up to the header to obtain the filter property name GridViewColumnHeader header = (GridViewColumnHeader)UIHelpers.FindElementOfTypeUp(filterListView, typeof(GridViewColumnHeader)); SortableGridViewColumn column = (SortableGridViewColumn)header.Column; String currentFilterProperty = column.SortPropertyName; if (filterItem == null) { return; } // determine whether to clear the filter for this column if (filterItem.ItemView.Equals("Clear")) { if (currentFilters.ContainsKey(currentFilterProperty)) { FilterStruct filter = (FilterStruct)currentFilters[currentFilterProperty]; filter.button.ContentTemplate = (DataTemplate)dictionary["filterButtonInactiveTemplate"]; if (FilterButtonInactiveStyle != null) { filter.button.Style = FilterButtonInactiveStyle; } currentFilters.Remove(currentFilterProperty); } ApplyCurrentFilters(); } else { // find the button and apply the active style Button button = (Button)UIHelpers.FindVisualElement(header, "filterButton"); button.ContentTemplate = (DataTemplate)dictionary["filterButtonActiveTemplate"]; if (FilterButtonActiveStyle != null) { button.Style = FilterButtonActiveStyle; } AddFilter(currentFilterProperty, filterItem, button); ApplyCurrentFilters(); } // navigate up to the popup and close it Popup popup = (Popup)UIHelpers.FindElementOfTypeUp(filterListView, typeof(Popup)); popup.IsOpen = false; }
/// /// Executes when the control is initialized completely the first time through. Runs only once. /// /// protected override void OnInitialized(EventArgs e) { // Uri uri = new Uri("MasterPageModel/ComponentsModel/FilterableListView/FilterListViewDictionary.xaml", UriKind.Relative);< // dictionary = Application.LoadComponent(uri) as ResourceDictionary; this.dictionary = Application.Current.Resources; // add the event handler to the GridViewColumnHeader. This strongly ties this ListView to a GridView. this.AddHandler(GridViewColumnHeader.ClickEvent, new RoutedEventHandler(GridViewColumnHeaderClickedHandler)); // cast the ListView's View to a GridView GridView gridView = this.View as GridView; if (gridView != null) { // determine which column is marked as IsDefaultSortColumn. Stops on the first column marked this way. SortableGridViewColumn sortableGridViewColumn = null; foreach (GridViewColumn gridViewColumn in gridView.Columns) { gridViewColumn.HeaderTemplate = (DataTemplate)dictionary["SortableGridHeaderTemplate"]; sortableGridViewColumn = gridViewColumn as SortableGridViewColumn; if (sortableGridViewColumn != null) { if (sortableGridViewColumn.IsDefaultSortColumn) { break; } sortableGridViewColumn = null; } } // if the default sort column is defined, sort the data and then update the templates as necessary. if (sortableGridViewColumn != null) { lastSortedOnColumn = sortableGridViewColumn; Sort(sortableGridViewColumn.SortPropertyName, ListSortDirection.Ascending); if (!String.IsNullOrEmpty(this.ColumnHeaderSortedAscendingTemplate)) { sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedAscendingTemplate) as DataTemplate; } this.SelectedIndex = 0; } } base.OnInitialized(e); }
/// /// Event Handler for the ColumnHeader Click Event. /// /// /// private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e) { // Uri uri = new Uri("MasterPageModel/ComponentsModel/FilterableListView/FilterListViewDictionary.xaml", UriKind.Relative); ResourceDictionary dictionary = Application.Current.Resources; GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader; // ensure that we clicked on the column header and not the padding that's added to fill the space. if (headerClicked != null && headerClicked.Role != GridViewColumnHeaderRole.Padding) { // attempt to cast to the sortableGridViewColumn object. SortableGridViewColumn sortableGridViewColumn = (headerClicked.Column) as SortableGridViewColumn; // ensure that the column header is the correct type and a sort property has been set. if (sortableGridViewColumn != null && !String.IsNullOrEmpty(sortableGridViewColumn.SortPropertyName)) { ListSortDirection direction; // determine if this is a new sort, or a switch in sort direction. if (lastSortedOnColumn == null || String.IsNullOrEmpty(lastSortedOnColumn.SortPropertyName) || !String.Equals(sortableGridViewColumn.SortPropertyName, lastSortedOnColumn.SortPropertyName, StringComparison.InvariantCultureIgnoreCase)) { direction = ListSortDirection.Ascending; } else { if (lastDirection == ListSortDirection.Ascending) { direction = ListSortDirection.Descending; } else { direction = ListSortDirection.Ascending; } } // get the sort property name from the column's information. string sortPropertyName = sortableGridViewColumn.SortPropertyName; // Sort the data. Sort(sortPropertyName, direction); Label sortIndicator = (Label)UIHelpers.SingleFindDownInTree(headerClicked, new UIHelpers.FinderMatchName("sortIndicator")); if (direction == ListSortDirection.Ascending) { sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowUp"]; } else { sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowDown"]; } // Remove arrow from previously sorted header if (lastSortedOnColumnHeader != null && lastSortedOnColumnHeader != headerClicked) { sortIndicator = (Label)UIHelpers.SingleFindDownInTree(lastSortedOnColumnHeader, new UIHelpers.FinderMatchName("sortIndicator")); sortIndicator.Style = (Style)dictionary["HeaderTemplateTransparent"]; } lastSortedOnColumn = sortableGridViewColumn; lastSortedOnColumnHeader = headerClicked; } } }
/// <summary> /// Handles the ShowFilter command to populate the filter list and display the popup /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ShowFilterCommand(object sender, ExecutedRoutedEventArgs e) { Button button = e.OriginalSource as Button; if (button != null) { // navigate up to the header GridViewColumnHeader header = (GridViewColumnHeader)UIHelpers.FindElementOfTypeUp(button, typeof(GridViewColumnHeader)); // then down to the popup Popup popup = (Popup)UIHelpers.FindElementOfType(header, typeof(Popup)); if (popup != null) { // find the property name that we are filtering SortableGridViewColumn column = (SortableGridViewColumn)header.Column; String propertyName = column.SortPropertyName; // clear the previous filter if (filterList == null) { filterList = new ArrayList(); } filterList.Clear(); // if this property is currently being filtered, provide an option to clear the filter. if (IsPropertyFiltered(propertyName)) { filterList.Add(new FilterItem("Clear")); } else { bool containsNull = false; //PropertyDescriptor filterPropDesc = TypeDescriptor.GetProperties(typeof(Airport))[propertyName]; // iterate over all the objects in the list foreach (Object item in Items) { object value = getPropertyValue(item, propertyName); if (value != null) { FilterItem filterItem = new FilterItem(value as IComparable); Boolean contains = filterList.Cast <FilterItem>().ToList().Exists(i => i.Item.ToString() == filterItem.Item.ToString()); if (!filterList.Contains(filterItem) && !contains) { filterList.Add(filterItem); } } else { containsNull = true; } } filterList.Sort(); if (containsNull) { filterList.Add(new FilterItem(null)); } } // open the popup to display this list popup.DataContext = filterList; CollectionViewSource.GetDefaultView(filterList).Refresh(); popup.IsOpen = true; // connect to the selection change event ListView listView = UIHelpers.FindChild <ListView>(popup.Child, "filterList"); //listView.SelectionChanged += SelectionChangedHandler; Button btnOk = UIHelpers.FindChild <Button>(popup.Child, "btnOk"); btnOk.Click += btnOk_Click; Button btnCancel = UIHelpers.FindChild <Button>(popup.Child, "btnCancel"); btnCancel.Click += btnCancel_Click; } } }