private static void ComboBoxOnDropDownOpened(object sender, EventArgs eventArgs) { var comboBox = (ComboBox)sender; var cloneTextBox = comboBox.Template.FindName("EditableTextBoxClone", comboBox) as TextBox; var originalTextBox = comboBox.Template.FindName("PART_EditableTextBox", comboBox) as TextBox; if (cloneTextBox != null && originalTextBox != null) { var managedOverlayInfo = new ComboBoxAssistManagedOverlayInfo(comboBox, originalTextBox, cloneTextBox); cloneTextBox.PreviewKeyDown += CloneTextBoxOnPreviewKeyDown; cloneTextBox.SelectionLength = originalTextBox.SelectionLength; cloneTextBox.SelectionStart = originalTextBox.SelectionStart; originalTextBox.SelectionChanged += OriginalTextBoxOnSelectionChanged; SetManagedOverlayInfo(comboBox, managedOverlayInfo); SetManagedOverlayInfo(originalTextBox, managedOverlayInfo); SetManagedOverlayInfo(cloneTextBox, managedOverlayInfo); } cloneTextBox?.Dispatcher.BeginInvoke(new Action(() => { cloneTextBox.Focus(); })); }
private static void ComboBoxOnDropDownOpened(object sender, EventArgs eventArgs) { var comboBox = (ComboBox)sender; var cloneTextBox = comboBox.Template.FindName("EditableTextBoxClone", comboBox) as TextBox; var originalTextBox = comboBox.Template.FindName("PART_EditableTextBox", comboBox) as TextBox; if (cloneTextBox != null && originalTextBox != null) { var managedOverlayInfo = new ComboBoxAssistManagedOverlayInfo(comboBox, originalTextBox, cloneTextBox); cloneTextBox.PreviewKeyDown += CloneTextBoxOnPreviewKeyDown; cloneTextBox.SelectionLength = originalTextBox.SelectionLength; cloneTextBox.SelectionStart = originalTextBox.SelectionStart; originalTextBox.SelectionChanged += OriginalTextBoxOnSelectionChanged; SetManagedOverlayInfo(comboBox, managedOverlayInfo); SetManagedOverlayInfo(originalTextBox, managedOverlayInfo); SetManagedOverlayInfo(cloneTextBox, managedOverlayInfo); } cloneTextBox?.Dispatcher.BeginInvoke(new Action(() => { cloneTextBox.Focus(); })); }