//private static void TextBox_GotFocus(object sender, RoutedEventArgs e)
//{
// if (((TextBox)sender).SelectionLength == 0)
// ((TextBox)sender).SelectAll();
//}
public TextBoxReadOnlyCaretVisible()
{
//EventManager.RegisterClassHandler(typeof(TextBox),
// UIElement.GotFocusEvent,
// new RoutedEventHandler(TextBox_GotFocus));
AcceptsTab = false;
AcceptsReturn = false;
IsReadOnly = false;
HorizontalAlignment = HorizontalAlignment.Stretch;
VerticalAlignment = VerticalAlignment.Stretch;
TextWrapping = TextWrapping.Wrap;
// EQUIVALENT of DynamicResource in XAML
//SetResourceReference(Control.BackgroundProperty, SystemColors.ControlLightLightBrushKey);
SetResourceReference(Control.BorderBrushProperty, SystemColors.ControlDarkBrushKey);
//Background = SystemColors.ControlLightLightBrush;
//BorderBrush = SystemColors.ControlDarkDarkBrush;
SnapsToDevicePixels = true;
#if NET40
////TODO:
//TextBox.CaretBrush
//TextBox.SelectionBrush
#endif
GotFocus += ((sender, e) =>
{
if (!string.IsNullOrEmpty(SelectedText))
{
SetAccessibleNameAndNotifyScreenReaderAutomationIfKeyboardFocused(SelectedText);
}
});
var tbSel = new TextBoxSelection();
SelectionChanged += ((sender, e) =>
{
tbSel.start = SelectionStart;
tbSel.length = SelectionLength;
if (!string.IsNullOrEmpty(SelectedText))
{
SetAccessibleNameAndNotifyScreenReaderAutomationIfKeyboardFocused(SelectedText);
}
});
TextChanged += ((sender, e) =>
{
if (!string.IsNullOrEmpty(m_Text))
{
int start = tbSel.start;
int length = tbSel.length;
Text = m_Text;
Select(start, length);
}
});
}
protected override void UpdateImpl()
{
if (text != host.TextBoxText)
{
if (host.TextBoxText.Length >= MaxTextLength)
{
host.TextBoxText = host.TextBoxText.Substring(0, MaxTextLength);
text = host.TextBoxText;
}
OnTextChanged();
_lastText = text;
text = host.TextBoxText;
}
if (lastCaretIndex != host.TextBoxCaretIndex || lastSelection != host.TextBoxSelection || _lastText != text)
{
if (scrollIndex >= host.TextBoxCaretIndex)
{
do
{
scrollIndex--;
} while (scrollIndex >= text.Length);
if (scrollIndex < 0)
{
scrollIndex = 0;
}
stringObj.Text = text.Substring(scrollIndex);
stringObj.Update();
}
else
{
float tempWidth = 0;
scrollIndex--;
do
{
scrollIndex++;
stringObj.Text = text.Substring(scrollIndex);
stringObj.Update();
tempWidth = stringObj.GetWidthToIndex(host.TextBoxCaretIndex - scrollIndex);
} while (tempWidth >= TextBoxWidth);
}
_lastText = text;
lastSelection = host.TextBoxSelection;
lastCaretIndex = host.TextBoxCaretIndex;
}
float p1 = host.TextBoxSelection.SelectionStart < scrollIndex?stringObj.GetWidthToIndex(0) : stringObj.GetWidthToIndex(host.TextBoxSelection.SelectionStart - scrollIndex),
p2 = host.TextBoxSelection.SelectionEnd - scrollIndex >= stringObj.Text.Length ? stringObj.GetWidthToIndex(stringObj.Text.Length) : stringObj.GetWidthToIndex(host.TextBoxSelection.SelectionEnd - scrollIndex);
var width = stringObj.GetWidthToIndex(host.TextBoxCaretIndex - scrollIndex);
caret.Position = new Vector2(width, 0);
caret.RectangleWidth = caretWidth;
caret.RectangleHeight = TextBoxHeight + caretMargin;
selection.Position = new Vector2(p1, 0);
selection.RectangleWidth = p2 - p1;
selection.RectangleHeight = TextBoxHeight + caretMargin;
back.RectangleWidth = Math.Max(TextBoxWidth, stringObj.JustWidth);
back.RectangleHeight = stringObj.CharacterHeight + caretMargin;
border.Position = new Vector2(-thickness, -thickness);
border.BorderThickness = thickness;
border.RectangleWidth = Math.Max(TextBoxWidth, stringObj.JustWidth);
border.RectangleHeight = stringObj.CharacterHeight + caretMargin + thickness;
count++;
if (count >= 60)
{
count = 0;
}
}
