/// <summary>
/// Changes the caret mode.
/// </summary>
/// <param name="mode">The new mode.</param>
/// <param name="isChanged">True if the mode was changed.</param>
public virtual void SetCaretMode(CaretModes mode, out bool isChanged)
{
isChanged = false;
ulong OldFocusHash = FocusHash;
if (CaretMode != mode)
{
CaretMode = mode;
isChanged = true;
CheckCaretInvariant();
}
Debug.Assert(isChanged || OldFocusHash == FocusHash);
}
/// <summary></summary>
protected virtual void ShowNumberCaret(Point origin, string text, CaretModes mode, int position)
{
FormattedNumber fn = FormattedNumber.Parse(text);
GetNumberCaretParts(fn, position, out string BeforeExponent, out string ExponentString0, out string ExponentString1, out string InvalidText);
double X = origin.X.Draw;
double Y = origin.Y.Draw;
Brush Brush;
Brush = GetBrush(BrushSettings.NumberSignificand);
FormattedText ftSignificand = CreateFormattedText(BeforeExponent, EmSize, Brush);
X += ftSignificand.WidthIncludingTrailingWhitespace;
Brush = GetBrush(BrushSettings.NumberExponent);
FormattedText ftExponent0 = CreateFormattedText(ExponentString0, EmSize, Brush);
X += ftExponent0.WidthIncludingTrailingWhitespace;
FormattedText ftExponent1 = CreateFormattedText(ExponentString1, EmSize * SubscriptRatio, Brush);
X += ftExponent1.WidthIncludingTrailingWhitespace;
Brush = GetBrush(BrushSettings.NumberInvalid);
FormattedText ftInvalid = CreateFormattedText(InvalidText, EmSize, Brush);
X += ftInvalid.WidthIncludingTrailingWhitespace;
double CaretEmSize;
double CaretHeight;
if (position <= fn.SignificandPart.Length || fn.ExponentPart.Length == 0 || position > fn.SignificandPart.Length + 1)
{
CaretEmSize = EmSize;
CaretHeight = LineHeight.Draw;
}
else
{
CaretEmSize = EmSize * SubscriptRatio;
CaretHeight = LineHeight.Draw * SubscriptRatio;
}
ChangeFlashClockOpacity(isVisible: true);
ShowNumberCaretParts(fn, mode, position, X, Y, CaretEmSize, CaretHeight);
}
/// <summary></summary>
protected virtual void ShowNumberCaretParts(FormattedNumber fn, CaretModes mode, int position, double x, double y, double caretEmSize, double caretHeight)
{
if (mode == CaretModes.Insertion)
{
System.Windows.Rect CaretRect = new System.Windows.Rect(PagePadding.Left.Draw + x, PagePadding.Top.Draw + y, InsertionCaretWidth, caretHeight);
WpfDrawingContext.PushOpacity(1, FlashClock);
WpfDrawingContext.DrawRectangle(GetBrush(BrushSettings.CaretInsertion), GetPen(PenSettings.CaretInsertion), CaretRect);
WpfDrawingContext.Pop();
}
else
{
string CaretText;
if (position < fn.SignificandPart.Length)
{
CaretText = fn.SignificandPart.Substring(position, 1);
}
else if (position < fn.SignificandPart.Length + fn.ExponentPart.Length)
{
CaretText = fn.ExponentPart.Substring(position - fn.SignificandPart.Length, 1);
}
else
{
CaretText = fn.InvalidText.Substring(position - fn.SignificandPart.Length - fn.ExponentPart.Length, 1);
}
FormattedText ftCaret = CreateFormattedText(CaretText, caretEmSize, GetBrush(BrushSettings.CaretOverride));
System.Windows.Rect CaretRect = new System.Windows.Rect(PagePadding.Left.Draw + x, PagePadding.Top.Draw + y, ftCaret.WidthIncludingTrailingWhitespace, caretHeight);
WpfDrawingContext.PushOpacity(1, FlashClock);
WpfDrawingContext.DrawRectangle(GetBrush(BrushSettings.CaretOverride), GetPen(PenSettings.CaretOverride), CaretRect);
WpfDrawingContext.Pop();
}
}
public int GetCaretPositionInText(double x, string text, TextStyles textStyle, CaretModes mode, Measure maxTextWidth)
{
return(0);
}
public void ShowCaret(Point origin, string text, TextStyles textStyle, CaretModes mode, int position)
{
Debug.Assert(position >= 0 && ((mode == CaretModes.Insertion && position <= text.Length) || (mode == CaretModes.Override && position < text.Length)));
}
/// <summary>
/// Get the caret position corresponding to <paramref name="x"/> in <paramref name="text"/>.
/// </summary>
/// <param name="x">X-coordinate of the caret location.</param>
/// <param name="text">The text</param>
/// <param name="textStyle">The style used to measure <paramref name="text"/>.</param>
/// <param name="mode">The caret mode.</param>
/// <param name="maxTextWidth">The maximum width for a line of text. NaN means no limit.</param>
/// <returns>The position of the caret.</returns>
public virtual int GetCaretPositionInText(double x, string text, TextStyles textStyle, CaretModes mode, Measure maxTextWidth)
{
Brush Brush = GetBrush(StyleToForegroundBrush(textStyle));
if (textStyle == TextStyles.Comment)
{
x += CommentPadding.Left.Draw;
}
int Result = 0;
for (int i = 0; i < text.Length; i++)
{
FormattedText ft = CreateFormattedText(text.Substring(0, i + 1), EmSize, Brush);
if (!maxTextWidth.IsFloating)
{
ft.MaxTextWidth = maxTextWidth.Draw;
}
if (ft.WidthIncludingTrailingWhitespace >= x)
{
break;
}
Result++;
}
return(Result);
}
/// <summary></summary>
protected virtual void ShowNormalCaret(Point origin, string text, TextStyles textStyle, CaretModes mode, int position)
{
string LeftText = text.Substring(0, position);
Brush Brush = GetBrush(StyleToForegroundBrush(textStyle));
FormattedText ft = CreateFormattedText(LeftText, EmSize, Brush);
double X = origin.X.Draw + ft.WidthIncludingTrailingWhitespace;
double Y = origin.Y.Draw;
if (textStyle == TextStyles.Comment)
{
X += CommentPadding.Left.Draw;
Y += CommentPadding.Top.Draw;
}
ChangeFlashClockOpacity(isVisible: true);
if (mode == CaretModes.Insertion)
{
System.Windows.Rect CaretRect = new System.Windows.Rect(PagePadding.Left.Draw + X, PagePadding.Top.Draw + Y, InsertionCaretWidth, LineHeight.Draw);
WpfDrawingContext.PushOpacity(1, FlashClock);
WpfDrawingContext.DrawRectangle(GetBrush(BrushSettings.CaretInsertion), GetPen(PenSettings.CaretInsertion), CaretRect);
WpfDrawingContext.Pop();
}
else
{
string CaretText = text.Substring(position, 1);
ft = CreateFormattedText(CaretText, EmSize, GetBrush(BrushSettings.CaretOverride));
System.Windows.Rect CaretRect = new System.Windows.Rect(PagePadding.Left.Draw + X, PagePadding.Top.Draw + Y, ft.WidthIncludingTrailingWhitespace, LineHeight.Draw);
WpfDrawingContext.PushOpacity(1, FlashClock);
WpfDrawingContext.DrawRectangle(GetBrush(BrushSettings.CaretOverride), GetPen(PenSettings.CaretOverride), CaretRect);
WpfDrawingContext.Pop();
}
}
/// <summary>
/// Shows the caret.
/// </summary>
/// <param name="origin">Location of the cell with the caret.</param>
/// <param name="text">The full cell text.</param>
/// <param name="textStyle">The text style.</param>
/// <param name="mode">The caret mode.</param>
/// <param name="position">The position of the caret in <paramref name="text"/>.</param>
public virtual void ShowCaret(Point origin, string text, TextStyles textStyle, CaretModes mode, int position)
{
Debug.Assert(position >= 0 && ((mode == CaretModes.Insertion && position <= text.Length) || (mode == CaretModes.Override && position < text.Length)));
Debug.Assert(WpfDrawingContext != null);
if (textStyle == TextStyles.Number)
{
ShowNumberCaret(origin, text, mode, position);
}
else
{
ShowNormalCaret(origin, text, textStyle, mode, position);
}
IsLastFocusedFullCell = false;
}
