private TextBox CreateSignatureTextBox(BindableText text, Thickness margin, int page, int of)
{
TextBox tb = new TextBox {
AcceptsReturn = true, Background = Brushes.Transparent, BorderThickness = new Thickness(0), Margin = margin
};
Binding CreateBinding()
{
var binding = new Binding(nameof(text.Text));
binding.Mode = BindingMode.TwoWay;
binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
binding.Source = text;
return(binding);
}
var rawTextBinding = CreateBinding();
var pageCountBinding = CreateBinding();
pageCountBinding.Converter = new PageCountConverter(page, of);
tb.GotKeyboardFocus += (sender, e) =>
tb.SetBinding(TextBox.TextProperty, rawTextBinding);
tb.LostKeyboardFocus += (sender, e) =>
tb.SetBinding(TextBox.TextProperty, pageCountBinding);
tb.SetBinding(TextBox.TextProperty, pageCountBinding);
return(tb);
}
/// <summary>
/// Add an editable TextBox to all pages of the document (returns specified textbox, for focusing)
/// </summary>
public TextBox InitialAddSignatureTb(double x, double y, int textboxToReturnPageIndex)
{
// match x and y coordinates to height/width of the content of the page
x = x - Padding.Left;
y = y - Padding.Top;
if (x < 0 || x > ContentWidth)
{
return(null);
}
if (y < 0 || y > ContentHeight)
{
return(null);
}
// approximately center textbox on coordinates
x -= 2;
y -= 8;
var bindableText = new BindableText();
var signatureChange = new SignatureChange(bindableText, x, y);
return(AddSignatureNoCopy(signatureChange, textboxToReturnPageIndex));
}