private Color?manipulateRgb(Color color, string[] tokens, string text, TextBoxKeyPressingEventArgs args)
{
if (args.PressedKey != Key.Down && args.PressedKey != Key.Up)
{
return(null);
}
int caret = args.IntendedState.CaretPosition;
int firstComma = text.IndexOf(',');
if (caret <= firstComma)
{
return(Color.FromRgba(manipulateColorUnit(color.R, args), color.G, color.B, color.A));
}
int secondComma = nthIndexOfComma(text, 0, 2);
if (caret <= secondComma)
{
return(Color.FromRgba(color.R, manipulateColorUnit(color.G, args), color.B, color.A));
}
if (tokens.Length == 4)
{
int thirdComma = nthIndexOfComma(text, 0, 3);
if (caret > thirdComma)
{
return(Color.FromRgba(color.R, color.G, color.B, manipulateColorUnit(color.A, args)));
}
}
return(Color.FromRgba(color.R, color.G, manipulateColorUnit(color.B, args), color.A));
}
private void onKeyDown(object sender, KeyboardEventArgs args)
{
if (args.Key == Key.ShiftLeft)
{
_leftShiftOn = true; return;
}
if (args.Key == Key.ShiftRight)
{
_rightShiftOn = true; return;
}
if (!IsFocused)
{
return;
}
TextBoxKeyPressingEventArgs pressingArgs = new TextBoxKeyPressingEventArgs(args.Key);
OnPressingKey.Invoke(this, pressingArgs);
if (pressingArgs.ShouldCancel)
{
return;
}
processKey(args.Key);
}
private bool parseRgbColor(string text, TextBoxKeyPressingEventArgs args)
{
var tokens = text.Split(',');
if (tokens.Length != 3 && tokens.Length != 4)
{
return(false);
}
if (!byte.TryParse(tokens[0], out byte r))
{
return(false);
}
if (!byte.TryParse(tokens[1], out byte g))
{
return(false);
}
if (!byte.TryParse(tokens[2], out byte b))
{
return(false);
}
byte a = 255;
if (tokens.Length == 4)
{
if (!byte.TryParse(tokens[3], out a))
{
return(false);
}
}
var color = Color.FromRgba(r, g, b, a);
var newColor = manipulateRgb(color, tokens, text, args);
if (newColor != null)
{
color = newColor.Value;
if (tokens.Length == 4)
{
args.IntendedState.Text = $"{color.R},{color.G},{color.B},{color.A}";
}
else
{
args.IntendedState.Text = $"{color.R},{color.G},{color.B}";
}
}
_property.Prop.SetValue(_property.Object, color);
return(true);
}
private byte manipulateColorUnit(byte unit, TextBoxKeyPressingEventArgs args)
{
if (unit <= 0 && args.PressedKey == Key.Down)
{
return(unit);
}
if (unit >= 255 && args.PressedKey == Key.Up)
{
return(unit);
}
if (args.PressedKey == Key.Down)
{
return((byte)(unit - 1));
}
return((byte)(unit + 1));
}
private void onTextBoxKeyPressed(TextBoxKeyPressingEventArgs args)
{
if (args.PressedKey != Key.Enter)
{
return;
}
args.ShouldCancel = true;
string path = _fileTextBox.Text;
if (_device.FileSystem.DirectoryExists(path))
{
fillAllFiles(path);
}
else if (_device.FileSystem.FileExists(path))
{
onFileSelected(path);
}
}
private void onTextboxPressingKey(TextBoxKeyPressingEventArgs args)
{
string text = args.IntendedState.Text;
if (string.IsNullOrEmpty(text))
{
return;
}
//except for selecting pre-set colors from the dropdown, we'll allow multiple formats in the
//textbox for specifying the color:
//1. "{R},{G},{B}" or "{R},{G},{B},{A}": those would be from 0-255
//2. "#{HEXA}" for a hexa color number
if (parseHexaColor(text))
{
return;
}
parseRgbColor(text, args);
}
