public void OnDrawPage (object sender, Gtk.DrawPageArgs args)
{
using (Cairo.Context cr = args.Context.CairoContext) {
cr.MoveTo (margin_left, margin_top);
PageBreak start;
if (args.PageNr == 0) {
start = new PageBreak (0, 0);
} else {
start = page_breaks [args.PageNr - 1];
}
PageBreak end;
if (args.PageNr < page_breaks.Count) {
end = page_breaks [args.PageNr];
} else {
end = new PageBreak (-1, -1);
}
Gtk.PrintContext context = args.Context;
Gtk.TextIter position;
Gtk.TextIter end_iter;
Buffer.GetBounds (out position, out end_iter);
// Fast-forward to the right starting paragraph
while (position.Line < start.Paragraph) {
position.ForwardLine ();
}
bool done = position.Compare (end_iter) >= 0;
while (!done) {
Gtk.TextIter line_end = position;
if (!line_end.EndsLine ())
line_end.ForwardToLineEnd ();
int paragraph_number = position.Line;
int indentation;
using (Pango.Layout layout = CreateParagraphLayout (
context, position, line_end, out indentation)) {
for (int line_number = 0;
line_number < layout.LineCount && !done;
line_number++) {
// Skip the lines up to the starting line in the
// first paragraph on this page
if ((paragraph_number == start.Paragraph) &&
(line_number < start.Line)) {
continue;
}
// Break as soon as we hit the end line
if ((paragraph_number == end.Paragraph) &&
(line_number == end.Line)) {
done = true;
break;
}
Pango.LayoutLine line = layout.Lines [line_number];
Pango.Rectangle ink_rect = Pango.Rectangle.Zero;
Pango.Rectangle logical_rect = Pango.Rectangle.Zero;
line.GetExtents (ref ink_rect, ref logical_rect);
cr.MoveTo (margin_left + indentation,
cr.CurrentPoint.Y);
int line_height = Pango.Units.ToPixels (logical_rect.Height);
Cairo.PointD new_line_point = new Cairo.PointD (
margin_left + indentation,
cr.CurrentPoint.Y + line_height);
Pango.CairoHelper.ShowLayoutLine (cr, line);
cr.MoveTo (new_line_point);
}
}
position.ForwardLine ();
done = done || position.Compare (end_iter) >= 0;
}
int total_height = (int) args.Context.Height;
int total_width = (int) args.Context.Width;
int footer_height = 0;
Cairo.PointD footer_anchor;
using (Pango.Layout pages_footer = CreatePagenumbersLayout (
args.Context, args.PageNr + 1, page_breaks.Count + 1)) {
Pango.Rectangle ink_footer_rect;
Pango.Rectangle logical_footer_rect;
pages_footer.GetExtents (out ink_footer_rect, out logical_footer_rect);
footer_anchor = new Cairo.PointD (
CmToPixel (0.5, args.Context.DpiX),
total_height - margin_bottom);
footer_height = Pango.Units.ToPixels (logical_footer_rect.Height);
cr.MoveTo (
total_width - Pango.Units.ToPixels (logical_footer_rect.Width) -
CmToPixel (0.5, args.Context.DpiX),
footer_anchor.Y);
Pango.CairoHelper.ShowLayoutLine (cr, pages_footer.Lines [0]);
}
cr.MoveTo (footer_anchor);
Pango.CairoHelper.ShowLayoutLine (cr, timestamp_footer.Lines [0]);
cr.MoveTo (CmToPixel (0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.LineTo (total_width - CmToPixel (0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.Stroke ();
}
}
public void OnDrawPage(object sender, Gtk.DrawPageArgs args)
{
using (Cairo.Context cr = args.Context.CairoContext) {
cr.MoveTo(margin_left, margin_top);
PageBreak start;
if (args.PageNr == 0)
{
start = new PageBreak(0, 0);
}
else
{
start = page_breaks [args.PageNr - 1];
}
PageBreak end;
if (args.PageNr < page_breaks.Count)
{
end = page_breaks [args.PageNr];
}
else
{
end = new PageBreak(-1, -1);
}
Gtk.PrintContext context = args.Context;
Gtk.TextIter position;
Gtk.TextIter end_iter;
Buffer.GetBounds(out position, out end_iter);
// Fast-forward to the right starting paragraph
while (position.Line < start.Paragraph)
{
position.ForwardLine();
}
bool done = position.Compare(end_iter) >= 0;
while (!done)
{
Gtk.TextIter line_end = position;
if (!line_end.EndsLine())
{
line_end.ForwardToLineEnd();
}
int paragraph_number = position.Line;
int indentation;
using (Pango.Layout layout = CreateParagraphLayout(
context, position, line_end, out indentation)) {
for (int line_number = 0;
line_number < layout.LineCount && !done;
line_number++)
{
// Skip the lines up to the starting line in the
// first paragraph on this page
if ((paragraph_number == start.Paragraph) &&
(line_number < start.Line))
{
continue;
}
// Break as soon as we hit the end line
if ((paragraph_number == end.Paragraph) &&
(line_number == end.Line))
{
done = true;
break;
}
Pango.LayoutLine line = layout.Lines [line_number];
Pango.Rectangle ink_rect = Pango.Rectangle.Zero;
Pango.Rectangle logical_rect = Pango.Rectangle.Zero;
line.GetExtents(ref ink_rect, ref logical_rect);
cr.MoveTo(margin_left + indentation,
cr.CurrentPoint.Y);
int line_height = Pango.Units.ToPixels(logical_rect.Height);
Cairo.PointD new_line_point = new Cairo.PointD(
margin_left + indentation,
cr.CurrentPoint.Y + line_height);
Pango.CairoHelper.ShowLayoutLine(cr, line);
cr.MoveTo(new_line_point);
}
}
position.ForwardLine();
done = done || position.Compare(end_iter) >= 0;
}
int total_height = (int)args.Context.Height;
int total_width = (int)args.Context.Width;
int footer_height = 0;
Cairo.PointD footer_anchor;
using (Pango.Layout pages_footer = CreatePagenumbersLayout(
args.Context, args.PageNr + 1, page_breaks.Count + 1)) {
Pango.Rectangle ink_footer_rect;
Pango.Rectangle logical_footer_rect;
pages_footer.GetExtents(out ink_footer_rect, out logical_footer_rect);
footer_anchor = new Cairo.PointD(
CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom);
footer_height = Pango.Units.ToPixels(logical_footer_rect.Height);
cr.MoveTo(
total_width - Pango.Units.ToPixels(logical_footer_rect.Width) -
CmToPixel(0.5, args.Context.DpiX),
footer_anchor.Y);
Pango.CairoHelper.ShowLayoutLine(cr, pages_footer.Lines [0]);
}
cr.MoveTo(footer_anchor);
Pango.CairoHelper.ShowLayoutLine(cr, timestamp_footer.Lines [0]);
cr.MoveTo(CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.LineTo(total_width - CmToPixel(0.5, args.Context.DpiX),
total_height - margin_bottom - footer_height);
cr.Stroke();
}
}
private void OnBeginPrint (object sender, Gtk.BeginPrintArgs args)
{
Gtk.PrintOperation op = (Gtk.PrintOperation) sender;
Gtk.PrintContext context = args.Context;
timestamp_footer = CreateTimestampLayout (context);
// FIXME: These should be configurable settings later (UI Change)
margin_top = CmToPixel (1.5, context.DpiY);
margin_left = CmToPixel (1, context.DpiX);
margin_right = CmToPixel (1, context.DpiX);
margin_bottom = 0;
double max_height = Pango.Units.FromPixels ((int) context.Height -
margin_top - margin_bottom - ComputeFooterHeight (context));
Gtk.TextIter position;
Gtk.TextIter end_iter;
Buffer.GetBounds (out position, out end_iter);
double page_height = 0;
bool done = position.Compare (end_iter) >= 0;
while (!done) {
Gtk.TextIter line_end = position;
if (!line_end.EndsLine ())
line_end.ForwardToLineEnd ();
int paragraph_number = position.Line;
int indentation;
using (Pango.Layout layout = CreateParagraphLayout (
context, position, line_end, out indentation)) {
Pango.Rectangle ink_rect = Pango.Rectangle.Zero;
Pango.Rectangle logical_rect = Pango.Rectangle.Zero;
for (int line_in_paragraph = 0; line_in_paragraph < layout.LineCount;
line_in_paragraph++) {
Pango.LayoutLine line = layout.GetLine (line_in_paragraph);
line.GetExtents (ref ink_rect, ref logical_rect);
if (page_height + logical_rect.Height >= max_height) {
PageBreak page_break = new PageBreak (
paragraph_number, line_in_paragraph);
page_breaks.Add (page_break);
page_height = 0;
}
page_height += logical_rect.Height;
}
position.ForwardLine ();
done = position.Compare (end_iter) >= 0;
}
}
op.NPages = page_breaks.Count + 1;
}
