/// <summary>
/// Draws an <see cref="InvariantTextPrimitive"/>.
/// </summary>
protected override void DrawTextPrimitive(InvariantTextPrimitive textPrimitive)
{
textPrimitive.CoordinateSystem = CoordinateSystem.Destination;
// We adjust the font size depending on the scale so that it's the same size
// irrespective of the zoom
var fontSize = CalculateScaledFontPoints(textPrimitive.SizeInPoints, Dpi);
Font font = _fontFactory.CreateFont(textPrimitive.Font, fontSize, FontStyle.Regular, GraphicsUnit.Point, _defaultFont);
// Calculate how big the text will be so we can set the bounding box
textPrimitive.Dimensions = Surface.FinalBuffer.Graphics.MeasureString(textPrimitive.Text, font);
// Draw drop shadow
_brush.Color = Color.Black;
SizeF dropShadowOffset = new SizeF(1, 1);
PointF boundingBoxTopLeft = new PointF(textPrimitive.BoundingBox.Left, textPrimitive.BoundingBox.Top);
Surface.FinalBuffer.Graphics.DrawString(
textPrimitive.Text,
font,
_brush,
boundingBoxTopLeft + dropShadowOffset);
// Draw text
_brush.Color = textPrimitive.Color;
Surface.FinalBuffer.Graphics.DrawString(
textPrimitive.Text,
font,
_brush,
boundingBoxTopLeft);
textPrimitive.ResetCoordinateSystem();
}
public override void OnDrawing()
{
// upon drawing, re-centre the text
RectangleF bounds = base.ParentPresentationImage.ClientRectangle;
PointF anchor = new PointF(bounds.Left + bounds.Width / 2, bounds.Top + bounds.Height / 2);
_textGraphic.CoordinateSystem = CoordinateSystem.Destination;
_textGraphic.Location = anchor;
_textGraphic.ResetCoordinateSystem();
base.OnDrawing();
}
protected override void OnDrawing()
{
// upon drawing, re-centre the text
RectangleF bounds = base.ClientRectangle;
PointF anchor = new PointF(bounds.Left + bounds.Width / 2, bounds.Top + bounds.Height / 2);
InvariantTextPrimitive textGraphic = (InvariantTextPrimitive)base.ApplicationGraphics.FirstOrDefault(IsType <InvariantTextPrimitive>);
textGraphic.CoordinateSystem = CoordinateSystem.Destination;
textGraphic.Location = anchor;
textGraphic.ResetCoordinateSystem();
base.OnDrawing();
}
private void DecoratedGraphic_VisualStateChanged(object sender, VisualStateChangedEventArgs e)
{
base.DecoratedGraphic.CoordinateSystem = CoordinateSystem.Destination;
_textGraphic.CoordinateSystem = CoordinateSystem.Destination;
try
{
RectangleF rectangle = base.DecoratedGraphic.BoundingBox;
_textGraphic.Location = new PointF(rectangle.Right, rectangle.Top);
}
finally
{
_textGraphic.ResetCoordinateSystem();
base.DecoratedGraphic.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();
}
}