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[glabels/vala] Added initial print support.

commit 73441dc7b176870b6d8e36cf5f39e0211b427fb4
Author: Jim Evins <evins snaught com>
Date:   Wed Apr 18 23:00:17 2012 -0400

    Added initial print support.

 TODO                         |    5 +-
 glabels/Makefile.am          |    3 +-
 glabels/file.vala            |    9 ++
 glabels/label.vala           |  191 +++++++++++++++++++++++++++++++++++++-
 glabels/mini_preview.vala    |   11 +--
 glabels/print.vala           |  216 ------------------------------------------
 glabels/print_op.vala        |   91 ++++++++++++++++++
 glabels/print_op_dialog.vala |   40 ++++++++
 glabels/ui.vala              |   23 +-----
 9 files changed, 339 insertions(+), 250 deletions(-)
---
diff --git a/TODO b/TODO
index 1df9f05..7c6c0df 100644
--- a/TODO
+++ b/TODO
@@ -5,12 +5,15 @@ Use Cases
 Case #1: one or more sheets of identical labels/cards.  Examples: return address labels,
          business cards, multiple copies of a CD label.
 
+         1.A: Only a partial sheet of labels is printed.  E.g. use only labels 5,6,7&8.
+
 Case #2: Document merge from external data source. Each label has an identical design
          but varies in the data that is pulled from the data source.  Each data record
          produces a unique label.  Examples: address labels from an address list,
          name tags.
 
-Case #3: A sheet contains multiple sets of identical label/cards.
+Case #3: A sheet contains multiple sets of identical label/cards.  E.g. labels 1-5 are
+         of one design and labels 6-12 are a second design.
 
 
 Development plan
diff --git a/glabels/Makefile.am b/glabels/Makefile.am
index 5530527..1c0e83b 100644
--- a/glabels/Makefile.am
+++ b/glabels/Makefile.am
@@ -47,7 +47,8 @@ glabels_4_SOURCES = \
 	new_label_dialog.vala \
 	object_editor.vala \
 	prefs.vala \
-	print.vala \
+	print_op.vala \
+	print_op_dialog.vala \
 	property_editor.vala \
 	template_history.vala \
 	ui.vala \
diff --git a/glabels/file.vala b/glabels/file.vala
index 4f5b662..22613c9 100644
--- a/glabels/file.vala
+++ b/glabels/file.vala
@@ -411,6 +411,15 @@ namespace glabels
 		}
 
 
+		public void print( Label label, Window window )
+		{
+			PrintOpDialog op = new PrintOpDialog( label );
+
+			op.run( Gtk.PrintOperationAction.PRINT_DIALOG, window );
+			/* TODO: save print settings? */
+		}
+
+
 		private void close( Window window )
 		{
 			bool close_flag = true;
diff --git a/glabels/label.vala b/glabels/label.vala
index b43845d..e839b1b 100644
--- a/glabels/label.vala
+++ b/glabels/label.vala
@@ -1,6 +1,6 @@
 /*  label.vala
  *
- *  Copyright (C) 2011  Jim Evins <evins snaught com>
+ *  Copyright (C) 2011-2012  Jim Evins <evins snaught com>
  *
  *  This file is part of gLabels.
  *
@@ -68,6 +68,20 @@ namespace glabels
 		private string             cp_desc;
 
 
+		/* Print Model */
+		private const double OUTLINE_WIDTH =  0.25;
+		private const double TICK_OFFSET   =  2.25;
+		private const double TICK_LENGTH   = 18.0;
+
+		public Label label           { get; private set; }
+
+		public bool  outline_flag    { get; set; }
+		public bool  reverse_flag    { get; set; }
+		public bool  crop_marks_flag { get; set; }
+
+		public int   n_pages         { get; set; default = 1; }
+
+
 		/**
 		 * Filename
 		 */
@@ -1472,6 +1486,181 @@ namespace glabels
 		}
 
 
+		/*
+		 * Print Model
+		 */
+		public void print_simple_sheet( Cairo.Context cr, int i_page )
+		{
+			if ( crop_marks_flag )
+			{
+				print_crop_marks( cr );
+			}
+
+			TemplateFrame frame = template.frames.first().data;
+			Gee.ArrayList<TemplateCoord?> origins = frame.get_origins();
+
+			foreach ( TemplateCoord origin in origins )
+			{
+				print_label( cr, origin.x, origin.y, null );
+			}
+		}
+
+
+		private void print_crop_marks( Cairo.Context cr )
+		{
+			TemplateFrame frame = template.frames.first().data;
+
+			double w, h;
+			frame.get_size( out w, out h );
+
+			cr.save();
+
+			cr.set_source_rgb( 0, 0, 0 );
+			cr.set_line_width( OUTLINE_WIDTH );
+
+			foreach ( TemplateLayout layout in frame.layouts )
+			{
+
+				double xmin = layout.x0;
+				double ymin = layout.y0;
+				double xmax = layout.x0 + layout.dx*(layout.nx - 1) + w;
+				double ymax = layout.y0 + layout.dy*(layout.ny - 1) + h;
+
+				for ( int ix=0; ix < layout.nx; ix++ )
+				{
+					double x1 = xmin + ix*layout.dx;
+					double x2 = x1 + w;
+
+					double y1 = double.max((ymin - TICK_OFFSET), 0.0);
+					double y2 = double.max((y1 - TICK_LENGTH), 0.0);
+
+					double y3 = double.min((ymax + TICK_OFFSET), template.page_height);
+					double y4 = double.min((y3 + TICK_LENGTH), template.page_height);
+
+					cr.move_to( x1, y1 );
+					cr.line_to( x1, y2 );
+					cr.stroke();
+
+					cr.move_to( x2, y1 );
+					cr.line_to( x2, y2 );
+					cr.stroke();
+
+					cr.move_to( x1, y3 );
+					cr.line_to( x1, y4 );
+					cr.stroke();
+
+					cr.move_to( x2, y3 );
+					cr.line_to( x2, y4 );
+					cr.stroke();
+				}
+
+				for (int iy=0; iy < layout.ny; iy++ )
+				{
+					double y1 = ymin + iy*layout.dy;
+					double y2 = y1 + h;
+
+					double x1 = double.max((xmin - TICK_OFFSET), 0.0);
+					double x2 = double.max((x1 - TICK_LENGTH), 0.0);
+
+					double x3 = double.min((xmax + TICK_OFFSET), template.page_width);
+					double x4 = double.min((x3 + TICK_LENGTH), template.page_width);
+
+					cr.move_to( x1, y1 );
+					cr.line_to( x2, y1 );
+					cr.stroke();
+
+					cr.move_to( x1, y2 );
+					cr.line_to( x2, y2 );
+					cr.stroke();
+
+					cr.move_to( x3, y1 );
+					cr.line_to( x4, y1 );
+					cr.stroke();
+
+					cr.move_to( x3, y2 );
+					cr.line_to( x4, y2 );
+					cr.stroke();
+				}
+
+			}
+
+			cr.restore();
+		}
+
+
+		private void print_label( Cairo.Context cr,
+		                          double        x,
+		                          double        y,
+		                          MergeRecord?  record )
+		{
+			double w, h;
+			get_size( out w, out h );
+
+			cr.save();
+
+			/* Transform coordinate system to be relative to upper corner */
+			/* of the current label */
+			cr.translate( x, y );
+
+			cr.save();
+
+			clip_to_outline( cr );
+
+			cr.save();
+
+			/* Special transformations. */
+			if ( rotate )
+			{
+				cr.rotate( Math.PI/2 );
+				cr.translate( 0, -h );
+			}
+			if ( reverse_flag )
+			{
+				cr.translate( w, 0 );
+				cr.scale( -1, 1 );
+			}
+
+			draw( cr, false, record );
+
+			cr.restore(); /* From special transformations. */
+
+			cr.restore(); /* From clip to outline. */
+
+			if ( outline_flag )
+			{
+				draw_outline( cr );
+			}
+
+			cr.restore(); /* From translation. */
+		}
+
+
+		private void draw_outline( Cairo.Context cr )
+		{
+			cr.save();
+
+			cr.set_source_rgb( 0, 0, 0 );
+			cr.set_line_width( OUTLINE_WIDTH );
+
+			TemplateFrame frame = template.frames.first().data;
+			frame.cairo_path( cr, false );
+
+			cr.stroke();
+
+			cr.restore();
+		}
+
+
+		private void clip_to_outline( Cairo.Context cr )
+		{
+			TemplateFrame frame = template.frames.first().data;
+			frame.cairo_path( cr, true );
+
+			cr.set_fill_rule( Cairo.FillRule.EVEN_ODD );
+			cr.clip();
+		}
+
+
 	}
 
 }
diff --git a/glabels/mini_preview.vala b/glabels/mini_preview.vala
index 3fff2f2..d7ecb5d 100644
--- a/glabels/mini_preview.vala
+++ b/glabels/mini_preview.vala
@@ -43,7 +43,7 @@ namespace glabels
 
 		private Gtk.DrawingArea canvas;
 
-		private Template?        template;
+		private Template?                     template;
 		private Gee.ArrayList<TemplateCoord?> origins;
 		private Gee.ArrayList<TemplateCoord?> centers;
 
@@ -408,15 +408,8 @@ namespace glabels
 
 		private void draw_rich_preview( Cairo.Context cr )
 		{
-			Print print = new Print();
-
-			print.label = label;
-			print.outline_flag = false;
-			print.reverse_flag = false;
-			print.crop_marks_flag = false;
-
 			/* TODO: test for merge. */
-			print.print_simple_sheet( cr );
+			label.print_simple_sheet( cr, 0 );
 		}
 
 		
diff --git a/glabels/print_op.vala b/glabels/print_op.vala
new file mode 100644
index 0000000..54585ff
--- /dev/null
+++ b/glabels/print_op.vala
@@ -0,0 +1,91 @@
+/*  print_op.vala
+ *
+ *  Copyright (C) 2012  Jim Evins <evins snaught com>
+ *
+ *  This file is part of gLabels.
+ *
+ *  gLabels is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  gLabels is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+using GLib;
+using libglabels;
+
+namespace glabels
+{
+
+	public class PrintOp : Gtk.PrintOperation
+	{
+		public Label     label       { get; private set; }
+
+
+		public PrintOp( Label label )
+		{
+			this.label = label;
+
+			set_page_size();
+
+			begin_print.connect( on_begin_print );
+			draw_page.connect( on_draw_page );
+		}
+
+
+		private void set_page_size()
+		{
+			Paper? paper = Db.lookup_paper_from_id( label.template.paper_id );
+
+			Gtk.PaperSize psize;
+			if ( paper == null )
+			{
+				string name = Gtk.PaperSize.get_default();
+				psize = new Gtk.PaperSize( name );
+			}
+			else if ( Db.is_paper_id_other( paper.id ) )
+			{
+				psize = new Gtk.PaperSize.custom( paper.id, paper.name,
+				                                  label.template.page_width, label.template.page_height,
+				                                  Gtk.Unit.POINTS );
+			}
+			else
+			{
+				psize = new Gtk.PaperSize( paper.pwg_size );
+			}
+
+			Gtk.PageSetup su = new Gtk.PageSetup();
+			su.set_paper_size( psize );
+			set_default_page_setup( su );
+		}
+
+
+		private void on_begin_print( Gtk.PrintContext context )
+		{
+			set_n_pages( label.n_pages );
+		}
+
+
+		private void on_draw_page( Gtk.PrintContext context, int i_page )
+		{
+			Cairo.Context cr = context.get_cairo_context();
+
+			if ( label.merge is MergeNone )
+			{
+				label.print_simple_sheet( cr, i_page );
+			}
+		}
+
+
+	}
+
+}
+
diff --git a/glabels/print_op_dialog.vala b/glabels/print_op_dialog.vala
new file mode 100644
index 0000000..e37c65f
--- /dev/null
+++ b/glabels/print_op_dialog.vala
@@ -0,0 +1,40 @@
+/*  print_op_dialog.vala
+ *
+ *  Copyright (C) 2012  Jim Evins <evins snaught com>
+ *
+ *  This file is part of gLabels.
+ *
+ *  gLabels is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  gLabels is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+using GLib;
+using libglabels;
+
+namespace glabels
+{
+
+	public class PrintOpDialog : PrintOp
+	{
+
+		public PrintOpDialog( Label label )
+		{
+			base( label );
+		}
+
+
+	}
+
+}
+
diff --git a/glabels/ui.vala b/glabels/ui.vala
index 9905f8d..6f0cf84 100644
--- a/glabels/ui.vala
+++ b/glabels/ui.vala
@@ -993,28 +993,7 @@ namespace glabels
 
 		private void on_file_print( Gtk.Action action )
 		{
-			/*
-			glPrintOpDialog         *op;
-			GtkPrintOperationResult  result;
-
-			op = gl_print_op_dialog_new (GL_VIEW(window->view)->label);
-
-			if (window->print_settings)
-			{
-				gl_print_op_set_settings (GL_PRINT_OP (op), window->print_settings);
-			}
-
-			result = gtk_print_operation_run (GTK_PRINT_OPERATION (op),
-			                                  GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
-			                                  GTK_WINDOW (window ),
-			                                  NULL);
-
-			if ( result == GTK_PRINT_OPERATION_RESULT_APPLY )
-			{
-				gl_print_op_free_settings (window->print_settings);
-				window->print_settings = gl_print_op_get_settings (GL_PRINT_OP (op));
-			}
-			*/
+			File.print( window.view.label, window );
 		}
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