/// <summary>
/// Measures the given text and returns its size.
/// </summary>
/// <param name="text">The text to measure</param>
/// <param name="characterStyle">The text's character style.</param>
/// <param name="proposedSize">The layout area of the text. Size.Empty means no fitting in area.</param>
/// <param name="paragraphStyle">The paragraph layout of the text</param>
/// <returns></returns>
public static Size MeasureText(string text, ICharacterStyle characterStyle, Size proposedSize, IParagraphStyle paragraphStyle)
{
using (Graphics graphics = Graphics.FromHwnd(IntPtr.Zero))
return(MeasureText(graphics, text, ToolCache.GetFont(characterStyle), proposedSize, ToolCache.GetStringFormat(paragraphStyle)));
}
/// <summary>
/// Measures the given text and returns its size.
/// </summary>
/// <param name="graphics">Graphics context used for the measuring</param>
/// <param name="text">The text to measure</param>
/// <param name="characterStyle">The text's character style</param>
/// <param name="proposedSize">The layout area of the text. Size.Empty means no fitting in area.</param>
/// <param name="paragraphStyle">The paragraph layout of the text</param>
/// <returns></returns>
public static Size MeasureText(Graphics graphics, string text, ICharacterStyle characterStyle, Size proposedSize, IParagraphStyle paragraphStyle)
{
if (paragraphStyle == null)
{
throw new ArgumentNullException("paragraphStyle");
}
return(MeasureText(graphics, text, ToolCache.GetFont(characterStyle), proposedSize, ToolCache.GetStringFormat(paragraphStyle)));
}
/// <summary>
/// Calculates the current text's area within the given caption bounds.
/// </summary>
public Rectangle CalculateTextBounds(Rectangle captionBounds, ICharacterStyle characterStyle,
IParagraphStyle paragraphStyle, IDisplayService displayService)
{
Rectangle textBounds = Rectangle.Empty;
Debug.Assert(characterStyle != null);
Debug.Assert(paragraphStyle != null);
// measure the text size
//if (float.IsNaN(dpiY)) dpiY = gfx.DpiY;
if (displayService != null)
{
textBounds.Size = TextMeasurer.MeasureText(displayService.InfoGraphics, string.IsNullOrEmpty(captionText)
? "Ig"
: captionText,
ToolCache.GetFont(characterStyle), captionBounds.Size, paragraphStyle);
}
else
{
textBounds.Size = TextMeasurer.MeasureText(string.IsNullOrEmpty(captionText)
? "Ig"
: captionText, ToolCache.GetFont(characterStyle), captionBounds.Size,
paragraphStyle);
}
// clip text bounds if too large
if (textBounds.Width > captionBounds.Width)
{
textBounds.Width = captionBounds.Width;
}
if (textBounds.Height > captionBounds.Height)
{
textBounds.Height = captionBounds.Height;
}
// set horizontal alignment
switch (paragraphStyle.Alignment)
{
case ContentAlignment.BottomLeft:
case ContentAlignment.MiddleLeft:
case ContentAlignment.TopLeft:
textBounds.X = captionBounds.X;
break;
case ContentAlignment.BottomCenter:
case ContentAlignment.MiddleCenter:
case ContentAlignment.TopCenter:
textBounds.X = captionBounds.X + (int)Math.Round((captionBounds.Width - textBounds.Width) / 2f);
break;
case ContentAlignment.BottomRight:
case ContentAlignment.MiddleRight:
case ContentAlignment.TopRight:
textBounds.X = captionBounds.Right - textBounds.Width;
break;
default:
Debug.Assert(false, "Unhandled switch case");
break;
}
// set vertical alignment
switch (paragraphStyle.Alignment)
{
case ContentAlignment.BottomCenter:
case ContentAlignment.BottomLeft:
case ContentAlignment.BottomRight:
textBounds.Y = captionBounds.Bottom - textBounds.Height;
break;
case ContentAlignment.MiddleCenter:
case ContentAlignment.MiddleLeft:
case ContentAlignment.MiddleRight:
textBounds.Y = captionBounds.Top + (int)Math.Round((captionBounds.Height - textBounds.Height) / 2f);
break;
case ContentAlignment.TopCenter:
case ContentAlignment.TopLeft:
case ContentAlignment.TopRight:
textBounds.Y = captionBounds.Top;
break;
default:
Debug.Assert(false, "Unhandled switch case");
break;
}
return(textBounds);
}
