public void PrintDocument_PrintPage(object sender, PrintPageEventArgs e)
{
// we do not use the buffers when printing (the printer is probably higher-resolution!)
Graphics gr = e.Graphics;
Page page = CurrentDocument.Page(m_PrintPageIndex);
e.PageSettings.Landscape = page.IsLandscape;
gr.ResetTransform();
gr.PageUnit = GraphicsUnit.Pixel; // GraphicsUnit.Millimeter ' it shows 600 DPI which makes the usual scaling conversion for mono impossible
SizeF printable = e.PageSettings.PrintableArea.Size.MultiplyBy(Geometry.INCH / 100); // in mm. Apparently e.MarginBounds or e.PageSettings.PrintableArea is in hundredths of an inch (?)
if (page.IsLandscape)
{
printable = printable.Flip(); // But sadly e.PageSettings.PrintableArea does not account for orientation
}
var pageSize = page.Size;
// max scale that will fit:
var scale = Math.Min(printable.Width / pageSize.Width, printable.Height / pageSize.Height);
if (scale > 0.97f) // will not fit at full size (allow a bit <1 in case of slight margin issues)
{
scale = 1; // don't shrink
}
else
{
pageSize.Width *= scale; // update page size for centreing below
pageSize.Height *= scale;
}
gr.ScaleTransform(scale * gr.DpiX / Geometry.INCH, scale * gr.DpiY / Geometry.INCH);
gr.TranslateTransform(0, page.Size.Height - 1);
// centre it
gr.TranslateTransform(scale * (pageSize.Width - pageSize.Width) / 2, scale * (pageSize.Height - pageSize.Height) / 2);
// No need to take account of the margins if we are centring it anyway
//gr.TranslateTransform(m_objPage.Margin - INCH * e.PageSettings.HardMarginX / 100, m_objPage.Margin - INCH * e.PageSettings.HardMarginY / 100)
gr.SmoothingMode = SmoothingMode.AntiAlias;
gr.TextRenderingHint = TextRenderingHint.AntiAlias; // otherwise text on transparent buffer is naff
using (NetCanvas canvas = new NetCanvas(gr, true))
{
page.DrawBackground(canvas, scale * gr.DpiX / Geometry.INCH, page.Paper.PrintBackground, false);
if (page != CurrentPage)
{
page.BackgroundImage?.Release(); // avoid overload if document has masses of large pages
}
if (e.PageSettings.PrinterSettings.PrintRange == PrintRange.Selection)
{
page.DrawSelected(canvas, null, scale, gr.DpiX / Geometry.INCH, true);
}
else
{
page.DrawShapes(canvas, scale, gr.DpiX / Geometry.INCH, null, !PrintMeasures);
}
}
m_PrintPageIndex += 1;
switch (m_PrintDocument.PrinterSettings.PrintRange)
{
case PrintRange.CurrentPage:
case PrintRange.Selection:
e.HasMorePages = false;
break;
default:
e.HasMorePages = m_PrintPageIndex + 1 <= m_PrintDocument.PrinterSettings.ToPage; // +1 is the conversion from 0-based to 1-based
break;
}
}
protected override Bitmap CreateSampleImage2(int size)
{
if (CustomRequiresParameter)
{
return(Resources.AM.GreyQuestion_32);
}
Bitmap bitmap = new Bitmap(32, 32, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (Graphics gr = Graphics.FromImage(bitmap))
{
using (NetCanvas canvas = new NetCanvas(gr))
{
gr.Clear(Color.Transparent);
gr.SmoothingMode = SmoothingMode.AntiAlias;
switch (Change)
{
case Parameters.FillColour:
gr.Clear(Color.FromArgb(Value));
break;
case Parameters.FillPattern:
if ((Shape.FillStyleC.Patterns)Value == Shape.FillStyleC.Patterns.Solid)
{
gr.Clear(Color.Black);
} // leave it white
else if ((Shape.FillStyleC.Patterns)Value == Shape.FillStyleC.Patterns.Empty)
{
}
else if ((Shape.FillStyleC.Patterns)Value == Shape.FillStyleC.Patterns.Texture)
{
gr.Clear(Color.Gray);
Debug.Fail("Cannot create sample image for Texture pattern");
}
else
{
HatchBrush br = new HatchBrush((HatchStyle)Value, Color.Black, Color.Empty);
gr.FillRectangle(br, 0, 0, 32, 32);
br.Dispose();
}
break;
case Parameters.LineColour:
using (Pen pn = new Pen(Color.FromArgb(Value), 2))
gr.DrawLine(pn, 1, 1, 30, 30);
break;
case Parameters.TextColour:
using (Font objFont = new Font(FontFamily.GenericSerif, 10))
using (SolidBrush br = new SolidBrush(Color.FromArgb(Value)))
gr.DrawString("Ab", objFont, br, 2, 10);
break;
case Parameters.LineWidth:
using (Pen pn = new Pen(Color.Black, Value / 100f * gr.DpiX / Geometry.INCH))
gr.DrawLine(pn, 1, 1, 30, 30);
break;
case Parameters.LinePattern:
using (Pen pn = new Pen(Color.Black, 2))
{
pn.DashStyle = (DashStyle)Value;
gr.DrawLine(pn, 1, 1, 30, 30);
}
break;
case Parameters.TextAlignment:
switch ((StringAlignment)Value)
{
case StringAlignment.Near: return((Bitmap)GUIUtilities.RM.GetObject("TextLeft"));
case StringAlignment.Center: return((Bitmap)GUIUtilities.RM.GetObject("TextCentre"));
case StringAlignment.Far: return((Bitmap)GUIUtilities.RM.GetObject("TextRight"));
default:
return(null);
}
case Parameters.TextVerticalAlignment:
switch ((StringAlignment)Value)
{
case StringAlignment.Near: return((Bitmap)GUIUtilities.RM.GetObject("TextTop"));
case StringAlignment.Center: return((Bitmap)GUIUtilities.RM.GetObject("TextMiddle"));
case StringAlignment.Far: return((Bitmap)GUIUtilities.RM.GetObject("TextBottom"));
}
break;
case Parameters.ArrowheadEndSize:
case Parameters.ArrowheadStartSize:
DrawArrowhead(canvas, Lined.ArrowheadC.Styles.SimpleSolid, Value);
break;
case Parameters.ArrowheadEndType:
case Parameters.ArrowheadStartType:
DrawArrowhead(canvas, (Lined.ArrowheadC.Styles)Value, Lined.ArrowheadC.DEFAULTSIZE);
break;
default:
gr.Clear(Color.Gray);
Debug.Fail("Unexpected parameter in CreateParameterSampleImage: " + Change);
break;
}
}
}
return(bitmap);
}
