public TextBoxBaseUserChangeTracker(TextBoxBase textBoxBase)
{
TextBoxBase = textBoxBase;
LastText = TextBoxBase.ToString();
textBoxBase.PreviewTextInput += (s, e) =>
{
IsTextInput = true;
};
textBoxBase.TextChanged += (s, e) =>
{
var isUserChange = PressedKeys.Count > 0 || IsTextInput || LastText == TextBoxBase.ToString();
IsTextInput = false;
LastText = TextBoxBase.ToString();
if (isUserChange)
{
UserTextChanged?.Invoke(this, e);
}
};
textBoxBase.PreviewKeyDown += (s, e) =>
{
switch (e.Key)
{
case Key.Back:
case Key.Space:
if (!PressedKeys.Contains(e.Key))
{
PressedKeys.Add(e.Key);
}
break;
}
if (e.Key == Key.Back)
{
var textBox = textBoxBase as TextBox;
if (textBox.SelectionStart > 0 && textBox.SelectionLength > 0 && (textBox.SelectionStart + textBox.SelectionLength) == textBox.Text.Length)
{
textBox.SelectionStart--;
textBox.SelectionLength++;
e.Handled = true;
UserTextChanged?.Invoke(this, e);
}
}
};
textBoxBase.PreviewKeyUp += (s, e) =>
{
if (PressedKeys.Contains(e.Key))
{
PressedKeys.Remove(e.Key);
}
};
textBoxBase.LostFocus += (s, e) =>
{
PressedKeys.Clear();
IsTextInput = false;
};
}
public TextBoxBaseUserChangeTracker(TextBoxBase textBox)
{
TextBox = textBox;
LastText = TextBox.ToString();
textBox.PreviewTextInput += (s, e) =>
{
IsTextInput = true;
};
textBox.TextChanged += (s, e) =>
{
var isUserChange = PressedKeys.Count > 0 || IsTextInput || LastText == TextBox.ToString();
IsTextInput = false;
LastText = TextBox.ToString();
if (isUserChange)
{
UserTextChanged?.Invoke(this, e);
}
};
textBox.PreviewKeyDown += (s, e) =>
{
switch (e.Key)
{
case Key.Back:
case Key.Space:
case Key.Delete:
if (!PressedKeys.Contains(e.Key))
{
PressedKeys.Add(e.Key);
}
break;
}
};
textBox.PreviewKeyUp += (s, e) =>
{
if (PressedKeys.Contains(e.Key))
{
PressedKeys.Remove(e.Key);
}
};
textBox.LostFocus += (s, e) =>
{
PressedKeys.Clear();
IsTextInput = false;
};
}
