Esempio n. 1
0
        public override TextExtents GetExtents(Cairo.Context cr)
        {
            if (!_extentsDetermined)
            {
                _extentsDetermined = true;

                cr.SetFont(_fontInfo);

                _extents        = cr.TextExtents(_text);
                _extents.Height = _fontInfo.MaxHeight;  // always use max height to ensure vertical alignment.

                if (_addSpaces > 0)
                {
                    _extents.Width += _addSpaces * _fontInfo.SpaceWidth;
                }
                else
                {
                    _extents.Width += _extents.XAdvance - _extents.Width;
                }

                if (_fontInfo.Underline)
                {
                    _extents.Height += _fontInfo.UnderlineHeight + 2.0;
                }

                _extents.YAdvance = _fontInfo.LineOffset;
            }
            return(_extents);
        }
Esempio n. 2
0
        public override void Draw(Cairo.Context cr, double xPos, double yPos, PrintLayer layer)
        {
            if (layer == PrintLayer.Text)
            {
                cr.SetFont(_fontInfo);

                yPos -= _extents.YAdvance;

                if (_fontInfo.Underline == true)
                {
                    TextExtents extents = GetExtents(cr);

                    cr.Rectangle(xPos
                                 , yPos - _fontInfo.UnderlineHeight
                                 , extents.Width
                                 , _fontInfo.UnderlineHeight);

                    cr.Fill();

                    yPos -= _fontInfo.UnderlineHeight + 2.0;
                }

                cr.MoveTo(xPos, yPos);
                cr.ShowText(_text);
            }
        }
Esempio n. 3
0
        public void SetExtents(Cairo.Context cr)
        {
            cr.SetFont(this);
            TextExtents extents = cr.TextExtents("Pp");

            _maxHeight  = extents.Height;
            _lineOffset = ((LineSpacing - 1) * extents.Height);

            extents     = cr.TextExtents("_");
            _spaceWidth = extents.Width;
        }