protected override void OnGdiPaintFrame(GdiPaintContext ctx)
{
using (Graphics graphics = Graphics.FromHdc(ctx.Hdc))
{
using (PaintEventArgs args = new PaintEventArgs(graphics, ctx.UpdateRect.ToGdipRectangle()))
{
this.OnGdipPaint(args);
}
}
}
public void EhView_PreviewPanelPaint(System.Drawing.Graphics g)
{
g.PageUnit = System.Drawing.GraphicsUnit.Point;
g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
g.FillRectangle(Brushes.Transparent, g.VisibleClipBounds);
g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
var paintContext = new GdiPaintContext();
// set position and rotation to zero
// m_TextObject.Position=new PointF(0,0);
// m_TextObject.Rotation = 0;
_doc.Paint(g, paintContext, true);
// restore the original position and rotation values
// m_TextObject.Position = new PointF(m_PositionX,m_PositionY);
// m_TextObject.Rotation = _rotation;
}
/// <summary>
/// Infrastructure. Don't use in your own projects. Will be called by PrintDocument during the printing process.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void EhPrintPage(object sender, PrintPageEventArgs e)
{
Graphics g = e.Graphics;
var savedGraphics = g.Save();
float hx = e.PageSettings.HardMarginX; // in hundreths of inch
float hy = e.PageSettings.HardMarginY; // in hundreths of inch
//g.TranslateTransform(-hx,-hy);
float zoom;
PointF startLocationOnPage;
SizeF graphSize = (SizeF)_layers.Size;
_printOptions.GetZoomAndStartLocation(e.PageBounds, e.MarginBounds, graphSize, out zoom, out startLocationOnPage, true);
graphSize = graphSize.Scale(zoom);
PointF startLocationInGraph = new PointF(0, 0);
if (_printOptions.TilePages)
{
startLocationOnPage = e.MarginBounds.Location; // when tiling pages start always from margin bounds
int columns = (int)Math.Ceiling(graphSize.Width / e.MarginBounds.Width);
int rows = (int)Math.Ceiling(graphSize.Height / e.MarginBounds.Height);
int col = _page % columns;
int row = _page / columns;
//startLocationInGraph = new PointF(col * e.MarginBounds.Width / zoom, row * e.MarginBounds.Height / zoom);
startLocationOnPage.X -= col * e.MarginBounds.Width;
startLocationOnPage.Y -= row * e.MarginBounds.Height;
_page++;
e.HasMorePages = _page < rows * columns;
}
if (_printOptions.PrintCropMarks)
{
float armLength = Math.Min(e.MarginBounds.Width, e.MarginBounds.Height) / 20.0f;
DrawCross(g, new PointF(e.MarginBounds.Left, e.MarginBounds.Top), armLength);
DrawCross(g, new PointF(e.MarginBounds.Right, e.MarginBounds.Top), armLength);
DrawCross(g, new PointF(e.MarginBounds.Left, e.MarginBounds.Bottom), armLength);
DrawCross(g, new PointF(e.MarginBounds.Right, e.MarginBounds.Bottom), armLength);
}
// DrawCrossedRectangle(g, e.MarginBounds);
// from here on we have units of Points
g.PageUnit = GraphicsUnit.Point;
if (!IsPrintPreview)
g.TranslateTransform(-hx * 72 / 100.0f, -hy * 72 / 100.0f);
g.TranslateTransform(startLocationOnPage.X * 72 / 100.0f, startLocationOnPage.Y * 72 / 100.0f);
g.ScaleTransform(zoom, zoom);
var paintContext = new GdiPaintContext();
_layers.PaintPreprocessing(paintContext);
_layers.Paint(g, paintContext);
_layers.PaintPostprocessing();
g.Restore(savedGraphics);
}
void IGdiPaintHost.OnGdiPaint(GdiPaintContext ctx)
{
this.OnGdiPaint(ctx);
}
protected virtual void OnGdiPaint(GdiPaintContext ctx)
{
}
