/// <summary>
/// Draws a string that is not a number, at the location specified in <paramref name="origin"/>.
/// </summary>
/// <param name="text">The text to draw.</param>
/// <param name="origin">The location where to start drawing.</param>
/// <param name="textStyle">Style to use for the text.</param>
/// <param name="isFocused">true if the whole text has the focus.</param>
public virtual void DrawText(string text, Point origin, TextStyles textStyle, bool isFocused)
{
Debug.Assert(WpfDrawingContext != null);
if (isFocused && DisplayFocus)
{
ChangeFlashClockOpacity(isVisible: true);
WpfDrawingContext.PushOpacity(1, FlashClock);
}
Brush Brush = GetBrush(StyleToForegroundBrush(textStyle));
FormattedText ft = CreateFormattedText(text, EmSize, Brush);
double X = PagePadding.Left.Draw + origin.X.Draw;
double Y = PagePadding.Top.Draw + origin.Y.Draw;
double Width = ft.Width;
double Height = LineHeight.Draw;
if (textStyle == TextStyles.Comment)
{
X += CommentPadding.Left.Draw;
Y += CommentPadding.Top.Draw;
}
WpfDrawingContext.DrawText(ft, new System.Windows.Point(X, Y));
if (isFocused && DisplayFocus)
{
WpfDrawingContext.Pop();
IsLastFocusedFullCell = true;
}
}
/// <summary>
/// Draws a symbol, at the location specified in <paramref name="origin"/>.
/// </summary>
/// <param name="symbol">The symbol to draw.</param>
/// <param name="origin">The location where to start drawing.</param>
/// <param name="size">The drawing size, padding included.</param>
/// <param name="padding">The padding to use when drawing.</param>
/// <param name="isFocused">true if the symbol text has the focus.</param>
public virtual void DrawSymbol(Symbols symbol, Point origin, Size size, Padding padding, bool isFocused)
{
Debug.Assert(WpfDrawingContext != null);
if (isFocused && DisplayFocus)
{
ChangeFlashClockOpacity(isVisible: true);
WpfDrawingContext.PushOpacity(1, FlashClock);
}
switch (symbol)
{
default:
case Symbols.LeftArrow:
case Symbols.Dot:
DrawTextSymbol(SymbolToText(symbol), origin, size, padding);
break;
case Symbols.InsertSign:
if (isFocused && DisplayFocus)
{
DrawTextSymbol(SymbolToText(symbol), origin, size, padding);
}
break;
case Symbols.LeftBracket:
DrawGeometrySymbol(LeftBracketGeometry, origin, size, padding);
break;
case Symbols.RightBracket:
DrawGeometrySymbol(RightBracketGeometry, origin, size, padding);
break;
case Symbols.LeftCurlyBracket:
DrawGeometrySymbol(LeftCurlyBracketGeometry, origin, size, padding);
break;
case Symbols.RightCurlyBracket:
DrawGeometrySymbol(RightCurlyBracketGeometry, origin, size, padding);
break;
case Symbols.LeftParenthesis:
DrawGeometrySymbol(LeftParenthesisGeometry, origin, size, padding);
break;
case Symbols.RightParenthesis:
DrawGeometrySymbol(RightParenthesisGeometry, origin, size, padding);
break;
case Symbols.HorizontalLine:
DrawGeometrySymbol(HorizontalLineGeometry, origin, size, padding);
break;
}
if (isFocused && DisplayFocus)
{
WpfDrawingContext.Pop();
IsLastFocusedFullCell = true;
}
}
private void PopOpacity(bool isPushed)
{
if (isPushed)
{
WpfDrawingContext.Pop();
IsLastFocusedFullCell = true;
}
}
/// <summary>
/// Draws the vertical separator above the specified origin and with the specified width.
/// </summary>
/// <param name="region">The region corresponding to the node that has a comment.</param>
public virtual void DrawCommentIcon(Rect region)
{
if (CommentIcon != null)
{
WpfDrawingContext.PushOpacity(0.5);
WpfDrawingContext.DrawImage(CommentIcon, new System.Windows.Rect(PagePadding.Left.Draw + region.X - (CommentIcon.Width / 2), PagePadding.Top.Draw + region.Y - (CommentIcon.Height / 2), CommentIcon.Width, CommentIcon.Height));
WpfDrawingContext.Pop();
}
}
/// <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></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();
}
}