private void panel1_Paint(object sender, PaintEventArgs e)
{
if (this.metafiles.Count < 1)
{
// no metafiles to show - do nothing
return;
}
// set the smoothing mode so that the rendering looks good
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
var brush_black = System.Drawing.Brushes.Black;
var brush_gray = System.Drawing.Brushes.Gray;
var brush_white = System.Drawing.Brushes.White;
var pen_red = System.Drawing.Pens.Red;
var pen_green = System.Drawing.Pens.Green;
var renderbox_margin = new SD.Size(10, 10);
bool use_print_area = this.checkBoxUsePrintableArea.Checked;
// retrieve the default size to be used for printing
var printer_settings = this.GetCurentPrinterSettings();
var landscape = printer_settings.DefaultPageSettings.Landscape;
// Get the sizes in common units
SD.SizeF papersize_raw = printer_settings.DefaultPageSettings.PaperSize.ToSizeF();
SD.SizeF rdlsize_raw = this.rdlmd.PageSize;
SD.RectangleF printable_area_raw = printer_settings.DefaultPageSettings.PrintableArea;
// Normalize the sizes into comparable units of 100th of an inch
SD.SizeF papersize_normalized = landscape ? papersize_raw.FlipSides() : papersize_raw; // adjust for landscape
SD.RectangleF printable_rect_normalized = landscape ? printable_area_raw.FlipSides() : printable_area_raw;
SD.SizeF rdlsize_normalized = rdlsize_raw.MultiplyBy(100.0f); // multiply by 100 to match printer units
// Fit the normalized RDL into the papersize
SD.SizeF rdlsize_normalized_size = use_print_area
? rdlsize_normalized.ResizeDownToFit(printable_rect_normalized.Size)
: rdlsize_normalized.ResizeDownToFit(papersize_normalized);
// the renderbox is the full area dedicated to the preview
// renderbox_margin keeps the preview from bumping into the edges of the renderbox
var renderbox_rect = this.panelRenderBox.Size.ToRect();
// display rect is the actual available region we use to render the preview
var display_rect = renderbox_rect.GetInternalRectangle(renderbox_margin);
// Coords for the white area, accounting for Landscape
var paper_rect = papersize_normalized.ToRectF();
var paper_scale = SSRSCommon.GraphicsUtil.GetFitToAreaScalingFactor(paper_rect.Size, display_rect.Size);
int new_paper_x = (int)((display_rect.Width - ((int)paper_rect.Width * paper_scale)) / 2.0);
int new_paper_y = (int)((display_rect.Height - ((int)paper_rect.Height * paper_scale)) / 2.0);
// Coords for the design
var mf = this.metafiles[this.page_index];
SD.RectangleF rdl_rect = use_print_area
? rdlsize_normalized_size.ToRectF().Add(printable_rect_normalized.Location)
: rdlsize_normalized_size.ToRectF().Add(0.0f, 0.0f);
// do the drawing -----------------------------------------
// Erase the entire background
e.Graphics.FillRectangle(brush_gray, renderbox_rect);
// Translate to account for the renderbox margin
e.Graphics.TranslateTransform(renderbox_margin.Width + new_paper_x, renderbox_margin.Height + new_paper_y);
e.Graphics.ScaleTransform((float)paper_scale, (float)paper_scale);
// Draw a white rectangle to simulate the physical page used by the printer
e.Graphics.FillRectangle(brush_white, paper_rect);
// Draw annotations
bool debug_rendering = true;
bool debug_show_printable_area = true;
bool debug_show_design_edges = true;
bool debug_show_inch_grid = this.checkBoxGrid.Checked;
bool debug_show_halfinch_grid = this.checkBoxGridHalf.Checked;
if (debug_rendering)
{
if (debug_show_inch_grid)
{
draw_inch_grid(e, papersize_normalized, 1.0f);
}
if (debug_show_halfinch_grid)
{
draw_inch_grid(e, papersize_normalized, 0.5f);
}
if (debug_show_printable_area)
{
e.Graphics.DrawRectangle(pen_green, printable_rect_normalized); // Green the printable area
}
if (debug_show_design_edges)
{
// RED - the edges of the RDL design
e.Graphics.DrawRectangle(pen_red, rdl_rect);
}
}
// Draw the EMF into a region on the white rectangle
e.Graphics.DrawImage(mf, rdl_rect);
}