/// <summary>
/// Draws a text primitive to the specified destination buffer.
/// </summary>
/// <param name="buffer">The destination buffer.</param>
/// <param name="gdiObjectFactory">A factory for GDI+ objects.</param>
/// <param name="text">The text primitive to be drawn.</param>
/// <param name="dpi">The intended output DPI.</param>
public static void DrawTextPrimitive(IGdiBuffer buffer, IGdiObjectFactory gdiObjectFactory, InvariantTextPrimitive text, float dpi = _nominalScreenDpi)
{
text.CoordinateSystem = CoordinateSystem.Destination;
try
{
// We adjust the font size depending on the scale so that it's the same size
// irrespective of the zoom
var fontSize = CalculateScaledFontPoints(text.SizeInPoints, dpi);
var createFontArgs = new CreateFontArgs(text.Font, fontSize, FontStyle.Regular, GraphicsUnit.Point)
{
DefaultFontName = FontFactory.GenericSansSerif
};
var font = gdiObjectFactory.CreateFont(createFontArgs);
// Calculate how big the text will be so we can set the bounding box
text.Dimensions = buffer.Graphics.MeasureString(text.Text, font);
// Draw drop shadow
var brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(Color.Black));
var dropShadowOffset = new SizeF(1, 1);
var boundingBoxTopLeft = new PointF(text.BoundingBox.Left, text.BoundingBox.Top);
buffer.Graphics.DrawString(
text.Text,
font,
brush,
boundingBoxTopLeft + dropShadowOffset);
// Draw text
brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(text.Color));
buffer.Graphics.DrawString(
text.Text,
font,
brush,
boundingBoxTopLeft);
}
finally
{
text.ResetCoordinateSystem();
}
}
/// <summary>
/// Draws a text primitive to the specified destination buffer.
/// </summary>
/// <param name="buffer">The destination buffer.</param>
/// <param name="gdiObjectFactory">A factory for GDI+ objects.</param>
/// <param name="text">The text primitive to be drawn.</param>
/// <param name="dpi">The intended output DPI.</param>
public static void DrawTextPrimitive(IGdiBuffer buffer, IGdiObjectFactory gdiObjectFactory, InvariantTextPrimitive text, float dpi = _nominalScreenDpi)
{
text.CoordinateSystem = CoordinateSystem.Destination;
try
{
// We adjust the font size depending on the scale so that it's the same size
// irrespective of the zoom
var fontSize = CalculateScaledFontPoints(text.SizeInPoints, dpi);
var createFontArgs = new CreateFontArgs(text.Font, fontSize, FontStyle.Regular, GraphicsUnit.Point) { DefaultFontName = FontFactory.GenericSansSerif };
var font = gdiObjectFactory.CreateFont(createFontArgs);
// Calculate how big the text will be so we can set the bounding box
text.Dimensions = buffer.Graphics.MeasureString(text.Text, font);
// Draw drop shadow
var brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(Color.Black));
var dropShadowOffset = new SizeF(1, 1);
var boundingBoxTopLeft = new PointF(text.BoundingBox.Left, text.BoundingBox.Top);
buffer.Graphics.DrawString(
text.Text,
font,
brush,
boundingBoxTopLeft + dropShadowOffset);
// Draw text
brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(text.Color));
buffer.Graphics.DrawString(
text.Text,
font,
brush,
boundingBoxTopLeft);
}
finally
{
text.ResetCoordinateSystem();
}
}
/// <summary>
/// Draws an annotation box to the specified destination buffer.
/// </summary>
/// <param name="buffer">The destination buffer.</param>
/// <param name="gdiObjectFactory">A factory for GDI objects.</param>
/// <param name="annotationText">The annotation text to be drawn.</param>
/// <param name="annotationBox">The annotation box to be drawn.</param>
/// <param name="dpi">The intended output DPI.</param>
public static void DrawAnnotationBox(IGdiBuffer buffer, IGdiObjectFactory gdiObjectFactory,
string annotationText, AnnotationBox annotationBox, float dpi = _nominalScreenDpi)
{
// if there's nothing to draw, there's nothing to do. go figure.
if (string.IsNullOrWhiteSpace(annotationText))
return;
var clientRectangle = RectangleUtilities.CalculateSubRectangle(buffer.Bounds, annotationBox.NormalizedRectangle);
//Deflate the client rectangle by 4 pixels to allow some space
//between neighbouring rectangles whose borders coincide.
Rectangle.Inflate(clientRectangle, -4, -4);
var fontSize = (clientRectangle.Height/annotationBox.NumberOfLines) - 1;
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
return;
var style = FontStyle.Regular;
if (annotationBox.Bold)
style |= FontStyle.Bold;
if (annotationBox.Italics)
style |= FontStyle.Italic;
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
return;
var fontArgs = new CreateFontArgs(annotationBox.Font, fontSize, style, GraphicsUnit.Pixel) { DefaultFontName = AnnotationBox.DefaultFont };
var font = gdiObjectFactory.CreateFont(fontArgs);
var format = gdiObjectFactory.CreateStringFormat(new CreateStringFormatArgs(annotationBox));
var layoutArea = new SizeF(clientRectangle.Width, clientRectangle.Height);
var size = buffer.Graphics.MeasureString(annotationText, font, layoutArea, format);
if (annotationBox.FitWidth && size.Width > clientRectangle.Width)
{
fontSize = (int) (Math.Round(fontSize*clientRectangle.Width/(double) size.Width - 0.5));
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
return;
font = gdiObjectFactory.CreateFont(fontArgs);
}
// Draw drop shadow
var brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(Color.Black));
clientRectangle.Offset(1, 1);
buffer.Graphics.DrawString(
annotationText,
font,
brush,
clientRectangle,
format);
brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(annotationBox.Color));
clientRectangle.Offset(-1, -1);
buffer.Graphics.DrawString(
annotationText,
font,
brush,
clientRectangle,
format);
}
/// <summary>
/// Draws an annotation box to the specified destination buffer.
/// </summary>
/// <param name="buffer">The destination buffer.</param>
/// <param name="gdiObjectFactory">A factory for GDI objects.</param>
/// <param name="annotationText">The annotation text to be drawn.</param>
/// <param name="annotationBox">The annotation box to be drawn.</param>
/// <param name="dpi">The intended output DPI.</param>
public static void DrawAnnotationBox(IGdiBuffer buffer, IGdiObjectFactory gdiObjectFactory,
string annotationText, AnnotationBox annotationBox, float dpi = _nominalScreenDpi)
{
// if there's nothing to draw, there's nothing to do. go figure.
if (string.IsNullOrWhiteSpace(annotationText))
{
return;
}
var clientRectangle = RectangleUtilities.CalculateSubRectangle(buffer.Bounds, annotationBox.NormalizedRectangle);
//Deflate the client rectangle by 4 pixels to allow some space
//between neighbouring rectangles whose borders coincide.
Rectangle.Inflate(clientRectangle, -4, -4);
var fontSize = (clientRectangle.Height / annotationBox.NumberOfLines) - 1;
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
{
return;
}
var style = FontStyle.Regular;
if (annotationBox.Bold)
{
style |= FontStyle.Bold;
}
if (annotationBox.Italics)
{
style |= FontStyle.Italic;
}
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
{
return;
}
var fontArgs = new CreateFontArgs(annotationBox.Font, fontSize, style, GraphicsUnit.Pixel)
{
DefaultFontName = AnnotationBox.DefaultFont
};
var font = gdiObjectFactory.CreateFont(fontArgs);
var format = gdiObjectFactory.CreateStringFormat(new CreateStringFormatArgs(annotationBox));
var layoutArea = new SizeF(clientRectangle.Width, clientRectangle.Height);
var size = buffer.Graphics.MeasureString(annotationText, font, layoutArea, format);
if (annotationBox.FitWidth && size.Width > clientRectangle.Width)
{
fontSize = (int)(Math.Round(fontSize * clientRectangle.Width / (double)size.Width - 0.5));
//don't draw it if it's too small to read, anyway.
if (fontSize < MinimumFontSizeInPixels)
{
return;
}
font = gdiObjectFactory.CreateFont(fontArgs);
}
// Draw drop shadow
var brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(Color.Black));
clientRectangle.Offset(1, 1);
buffer.Graphics.DrawString(
annotationText,
font,
brush,
clientRectangle,
format);
brush = gdiObjectFactory.CreateBrush(new CreateBrushArgs(annotationBox.Color));
clientRectangle.Offset(-1, -1);
buffer.Graphics.DrawString(
annotationText,
font,
brush,
clientRectangle,
format);
}