public static void UpdateCancelButton(this UISearchBar uiSearchBar, ISearchBar searchBar,
UIColor?cancelButtonTextColorDefaultNormal, UIColor?cancelButtonTextColorDefaultHighlighted, UIColor?cancelButtonTextColorDefaultDisabled)
{
uiSearchBar.ShowsCancelButton = !string.IsNullOrEmpty(uiSearchBar.Text);
// We can't cache the cancel button reference because iOS drops it when it's not displayed
// and creates a brand new one when necessary, so we have to look for it each time
var cancelButton = uiSearchBar.FindDescendantView <UIButton>();
if (cancelButton == null)
{
return;
}
if (searchBar.CancelButtonColor == null)
{
cancelButton.SetTitleColor(cancelButtonTextColorDefaultNormal, UIControlState.Normal);
cancelButton.SetTitleColor(cancelButtonTextColorDefaultHighlighted, UIControlState.Highlighted);
cancelButton.SetTitleColor(cancelButtonTextColorDefaultDisabled, UIControlState.Disabled);
}
else
{
cancelButton.SetTitleColor(searchBar.CancelButtonColor.ToNative(), UIControlState.Normal);
cancelButton.SetTitleColor(searchBar.CancelButtonColor.ToNative(), UIControlState.Highlighted);
cancelButton.SetTitleColor(searchBar.CancelButtonColor.ToNative(), UIControlState.Disabled);
}
}
public static void UpdateFont(this UISearchBar uiSearchBar, ITextStyle textStyle, IFontManager fontManager, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
textField.UpdateFont(textStyle, fontManager);
}
public static void UpdateVerticalTextAlignment(this UISearchBar uiSearchBar, ISearchBar searchBar, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
textField.VerticalAlignment = searchBar.VerticalTextAlignment.ToPlatformVertical();
}
void GetDefaultSearchBarColors(UISearchBar searchBar)
{
_defaultTintColor = searchBar.BarTintColor;
var cancelButton = searchBar.FindDescendantView <UIButton>();
if (cancelButton != null)
{
_cancelButtonTextColorDefaultNormal = cancelButton.TitleColor(UIControlState.Normal);
_cancelButtonTextColorDefaultHighlighted = cancelButton.TitleColor(UIControlState.Highlighted);
_cancelButtonTextColorDefaultDisabled = cancelButton.TitleColor(UIControlState.Disabled);
}
}
void SetupDefaults(UISearchBar nativeView)
{
_defaultTextColor = QueryEditor?.TextColor;
var cancelButton = nativeView.FindDescendantView <UIButton>();
if (cancelButton != null)
{
_cancelButtonTextColorDefaultNormal = cancelButton.TitleColor(UIControlState.Normal);
_cancelButtonTextColorDefaultHighlighted = cancelButton.TitleColor(UIControlState.Highlighted);
_cancelButtonTextColorDefaultDisabled = cancelButton.TitleColor(UIControlState.Disabled);
}
}
public static void UpdateFont(this UISearchBar uiSearchBar, ISearchBar searchBar, IFontManager fontManager, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
var uiFont = fontManager.GetFont(searchBar.Font);
textField.Font = uiFont;
}
public static void UpdateHorizontalTextAlignment(this UISearchBar uiSearchBar, ISearchBar searchBar, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
// We don't have a FlowDirection yet, so there's nothing to pass in here.
// TODO: Update this when FlowDirection is available
// (or update the extension to take an ILabel instead of an alignment and work it out from there)
textField.TextAlignment = searchBar.HorizontalTextAlignment.ToNative(true);
}
public static void UpdateIsTextPredictionEnabled(this UISearchBar uiSearchBar, ISearchBar searchBar, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
if (searchBar.IsTextPredictionEnabled)
{
textField.AutocorrectionType = UITextAutocorrectionType.Yes;
}
else
{
textField.AutocorrectionType = UITextAutocorrectionType.No;
}
}
public SearchHandlerAppearanceTracker(UISearchBar searchBar, SearchHandler searchHandler)
{
_searchHandler = searchHandler;
_searchHandler.PropertyChanged += SearchHandlerPropertyChanged;
_searchHandler.FocusChangeRequested += SearchHandlerFocusChangeRequested;
_uiSearchBar = searchBar;
_uiSearchBar.OnEditingStarted += OnEditingStarted;
_uiSearchBar.OnEditingStopped += OnEditingEnded;
_uiSearchBar.TextChanged += OnTextChanged;
_uiSearchBar.ShowsCancelButton = true;
GetDefaultSearchBarColors(_uiSearchBar);
var uiTextField = searchBar.FindDescendantView <UITextField>();
UpdateSearchBarColors();
UpdateSearchBarTextAlignment(uiTextField);
UpdateFont(uiTextField);
UpdateKeyboard();
}
public static void UpdatePlaceholder(this UISearchBar uiSearchBar, ISearchBar searchBar, UITextField?textField)
{
textField ??= uiSearchBar.FindDescendantView <UITextField>();
if (textField == null)
{
return;
}
var placeholder = searchBar.Placeholder ?? string.Empty;
var placeholderColor = searchBar.PlaceholderColor;
var foregroundColor = placeholderColor ?? ColorExtensions.PlaceholderColor.ToColor();
textField.AttributedPlaceholder = foregroundColor == null
? new NSAttributedString(placeholder)
: new NSAttributedString(str: placeholder, foregroundColor: foregroundColor.ToPlatform());
textField.AttributedPlaceholder.WithCharacterSpacing(searchBar.CharacterSpacing);
}
public void UpdateSearchBarColors()
{
var cancelButton = _uiSearchBar.FindDescendantView <UIButton>();
var uiTextField = _uiSearchBar.FindDescendantView <UITextField>();
UpdateTextColor(uiTextField);
UpdateSearchBarPlaceholder(uiTextField);
UpdateCancelButtonColor(cancelButton);
UpdateSearchBarBackgroundColor(uiTextField);
}