void OnControlLoaded(object sender, RoutedEventArgs routedEventArgs)
{
_queryTextBox = Control.GetFirstDescendant <FormsTextBox>();
_cancelButton = _queryTextBox?.GetFirstDescendant <FormsCancelButton>();
if (_cancelButton != null)
{
// The Cancel button's content won't be loaded right away (because the default Visibility is Collapsed)
// So we need to wait until it's ready, then force an update of the button color
_cancelButton.ReadyChanged += (o, args) => UpdateCancelButtonColor();
}
UpdateHorizontalTextAlignment();
UpdateVerticalTextAlignment();
UpdateTextColor();
UpdatePlaceholderColor();
UpdateBackgroundColor();
UpdateBackground();
UpdateIsSpellCheckEnabled();
UpdateInputScope();
UpdateMaxLength();
SetAutomationId(Element.AutomationId);
// If the Forms VisualStateManager is in play or the user wants to disable the Forms legacy
// color stuff, then the underlying textbox should just use the Forms VSM states
if (_queryTextBox != null)
{
_queryTextBox.UseFormsVsm = Element.HasVisualStateGroups() ||
!Element.OnThisPlatform().GetIsLegacyColorModeEnabled();
}
}
public static Size GetCopyOfSize(FormsTextBox control, Windows.Foundation.Size constraint)
{
if (_copyOfTextBox == null)
{
_copyOfTextBox = new FormsTextBox
{
Style = Microsoft.UI.Xaml.Application.Current.Resources["FormsTextBoxStyle"] as Microsoft.UI.Xaml.Style
};
// This causes the copy to be initially setup correctly.
// I found that if the first measure of this copy occurs with Text then it will just keep defaulting to a measure with no text.
_copyOfTextBox.Measure(_zeroSize);
}
_copyOfTextBox.MinHeight = control.MinHeight;
_copyOfTextBox.MaxHeight = control.MaxHeight;
_copyOfTextBox.MinWidth = control.MinWidth;
_copyOfTextBox.MaxWidth = control.MaxWidth;
_copyOfTextBox.TextWrapping = control.TextWrapping;
_copyOfTextBox.AcceptsReturn = control.AcceptsReturn;
_copyOfTextBox.Text = control.Text;
_copyOfTextBox.FontSize = control.FontSize;
_copyOfTextBox.FontFamily = control.FontFamily;
_copyOfTextBox.FontStretch = control.FontStretch;
_copyOfTextBox.FontStyle = control.FontStyle;
_copyOfTextBox.FontWeight = control.FontWeight;
_copyOfTextBox.Margin = control.Margin;
_copyOfTextBox.Padding = control.Padding;
// have to reset the measure to zero before it will re-measure itself
_copyOfTextBox.Measure(_zeroSize);
_copyOfTextBox.Measure(constraint);
var result = new Size
(
Math.Ceiling(_copyOfTextBox.DesiredSize.Width),
Math.Ceiling(_copyOfTextBox.DesiredSize.Height)
);
return(result);
}