public static bool FocusOrSelectAll(this SelectableEntry entry)
{
if (entry.IsFocused || entry.Focus())
{
entry.CursorPosition = 0;
entry.SelectionLength = entry.Text?.Length ?? 0;
return true;
}
return false;
}
public static bool HandleKeyDown(this SelectableEntry entry, string keys, bool replaceText)
{
if (entry.IsVisible)
{
var lines = keys.Split('\r', '\n');
var fl = lines.FirstOrDefault();
if (!string.IsNullOrEmpty(fl))
{
var func = entry.Keyboard != Keyboard.Numeric
&& entry.Keyboard != Keyboard.Telephone
? c => '0' <= c && c <= '9' || 'a' <= c && c <= 'z'
: (Func<char, bool>)(c => '0' <= c && c <= '9');
var nt = new string(fl.Where(func).ToArray());
string text;
int cursorPosition, selectionLength;
if (replaceText)
{
text = nt;
cursorPosition = 0;
selectionLength = text.Length;
}
else if (entry.IsFocused)
{
text = entry.Text;
cursorPosition = entry.CursorPosition;
selectionLength = entry.SelectionLength;
text = text.Substring(0, cursorPosition) + nt + text.Substring(cursorPosition + selectionLength);
cursorPosition += nt.Length;
selectionLength = 0;
}
else
{
text = entry.Text + nt;
cursorPosition = text.Length;
selectionLength = 0;
}
entry.Text = text;
if (lines.Length > 1)
{
entry.SendCompleted();
return true;
}
if (entry.IsFocused)
{
entry.CursorPosition = cursorPosition;
entry.SelectionLength = selectionLength;
if (!entry.IsKeyboardEnabled)
{
Device.BeginInvokeOnMainThread(() =>
{
DependencyService.Get<IKeyboardService>()?.Hide();
});
}
}
else
{
var sa = entry.SelectAllOnFocus;
entry.SelectAllOnFocus = false;
if (entry.Focus())
{
Device.BeginInvokeOnMainThread(() =>
{
entry.CursorPosition = cursorPosition;
entry.SelectionLength = selectionLength;
entry.SelectAllOnFocus = sa;
if (!entry.IsKeyboardEnabled)
{
DependencyService.Get<IKeyboardService>()?.Hide();
}
});
}
}
}
if (lines.Length > 1)
{
entry.SendCompleted();
}
return true;
}
return false;
}