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[gbrainy] Support for page per side in PDF export

commit f0f12adf040ab0e4ca8a5848f5b6faade285cb59
Author: Jordi Mas <jmas softcatala org>
Date:   Sat Nov 27 11:01:32 2010 +0100

    Support for page per side in PDF export

 src/Clients/Classical/Dialogs/PdfExportDialog.cs   |   61 +++++++++++++++----
 .../Classical/Dialogs/ui/PdfExportDialog.ui        |   18 ++----
 src/Core/Main/PdfExporter.cs                       |   51 +++++++++++++---
 3 files changed, 97 insertions(+), 33 deletions(-)
---
diff --git a/src/Clients/Classical/Dialogs/PdfExportDialog.cs b/src/Clients/Classical/Dialogs/PdfExportDialog.cs
index a523327..57d7f70 100644
--- a/src/Clients/Classical/Dialogs/PdfExportDialog.cs
+++ b/src/Clients/Classical/Dialogs/PdfExportDialog.cs
@@ -30,8 +30,7 @@ namespace gbrainy.Clients.Classical.Dialogs
 	public class PdfExportDialog : BuilderDialog
 	{
 		[GtkBeans.Builder.Object] Gtk.HBox hbox_file;
-		[GtkBeans.Builder.Object] Gtk.SpinButton games_spinbutton;	
-		[GtkBeans.Builder.Object] Gtk.SpinButton gamesperpage_spinbutton;
+		[GtkBeans.Builder.Object] Gtk.SpinButton games_spinbutton;
 		[GtkBeans.Builder.Object] Gtk.CheckButton colorblindcheckbutton;
 		[GtkBeans.Builder.Object] Gtk.RadioButton rb_easy;
 		[GtkBeans.Builder.Object] Gtk.RadioButton rb_medium;
@@ -39,18 +38,20 @@ namespace gbrainy.Clients.Classical.Dialogs
 		[GtkBeans.Builder.Object] Gtk.CheckButton checkbox_logic;
 		[GtkBeans.Builder.Object] Gtk.CheckButton checkbox_calculation;
 		[GtkBeans.Builder.Object] Gtk.CheckButton checkbox_verbal;
-	
+		[GtkBeans.Builder.Object] Gtk.ComboBox layout_combo;
+
 		BrowseFile file;
+		const int COLUMN_VALUE = 1;
+		const int DEF_SIDEVALUE = 4;
 
 		public PdfExportDialog () : base ("PdfExportDialog.ui", "pdfexportbox")
 		{
 			games_spinbutton.Value = 10;
-			gamesperpage_spinbutton.Value = 4;
 			checkbox_logic.Active = checkbox_calculation.Active = checkbox_verbal.Active = true;
 
 			// Use defaults from Preferences
 		 	switch ((GameDifficulty) Preferences.GetIntValue (Preferences.DifficultyKey)) {
-			case GameDifficulty.Easy:	
+			case GameDifficulty.Easy:
 				rb_easy.Active = rb_easy.HasFocus = true;
 				break;
 			case GameDifficulty.Medium:
@@ -62,7 +63,6 @@ namespace gbrainy.Clients.Classical.Dialogs
 			}
 			// File selection
 			string def_file;
-
 			def_file = System.IO.Path.Combine (
 				Environment.GetFolderPath (Environment.SpecialFolder.MyDocuments),
 				"games.pdf");
@@ -79,6 +79,29 @@ namespace gbrainy.Clients.Classical.Dialogs
 			filters[1].Name = Catalog.GetString ("All files");
 
 			file.Filters = filters;
+
+			ListStore layout_store = new ListStore (typeof (string), typeof (int)); // DisplayName, index to array
+			CellRenderer layout_cell = new CellRendererText ();
+			layout_combo.Model = layout_store;
+			layout_combo.PackStart (layout_cell, true);
+			layout_combo.SetCellDataFunc (layout_cell, ComboBoxCellFunc);
+
+			int [] per_side = PdfExporter.PagesPerSide;
+
+			for (int i = 0; i < per_side.Length; i++)
+				layout_store.AppendValues (per_side[i].ToString (), per_side[i]);
+
+			// Default value
+			TreeIter iter;
+			bool more = layout_store.GetIterFirst (out iter);
+			while (more)
+			{
+				if ((int) layout_store.GetValue (iter, COLUMN_VALUE) == DEF_SIDEVALUE) {
+					layout_combo.SetActiveIter (iter);
+					break;
+				}
+				more = layout_store.IterNext (ref iter);
+			}
 		}
 
 		GameDifficulty Difficulty {
@@ -104,11 +127,17 @@ namespace gbrainy.Clients.Classical.Dialogs
 				types |= GameSession.Types.CalculationTrainers;
 
 			if (checkbox_verbal.Active)
-				types |= GameSession.Types.VerbalAnalogies; 
-			
+				types |= GameSession.Types.VerbalAnalogies;
+
+
+			TreeIter iter;
+
+			layout_combo.GetActiveIter (out iter);
+			int sides = (int) layout_combo.Model.GetValue (iter, COLUMN_VALUE);
+
 			GeneratePdf (types,
 				(int) games_spinbutton.Value,
-				(int) gamesperpage_spinbutton.Value, 
+				sides,
 				Difficulty,
 				colorblindcheckbutton.Active,
 				file.Filename);
@@ -118,20 +147,26 @@ namespace gbrainy.Clients.Classical.Dialogs
 		{
 			Game [] games;
 			GameManager gm;
-			
+
 			games = new Game [num_games];
 			gm = new GameManager ();
 			gm.ColorBlind = colorblind;
 			gm.Difficulty = difficulty;
 			GtkClient.GameManagerPreload (gm);
 			gm.GameType = types;
-		
+
 			for (int n = 0; n < num_games; n++)
 			{
-				 games [n] = gm.GetPuzzle (); 
+				 games [n] = gm.GetPuzzle ();
 			}
-			
+
 			PdfExporter.GeneratePdf (games, gamespage, filename);
 		}
+
+		static public void ComboBoxCellFunc (CellLayout cell_layout, CellRenderer cell, TreeModel tree_model, TreeIter iter)
+		{
+			string name = (string)tree_model.GetValue (iter, 0);
+			(cell as CellRendererText).Text = name;
+		}
 	}
 }
diff --git a/src/Clients/Classical/Dialogs/ui/PdfExportDialog.ui b/src/Clients/Classical/Dialogs/ui/PdfExportDialog.ui
index b20dc58..fcb801d 100644
--- a/src/Clients/Classical/Dialogs/ui/PdfExportDialog.ui
+++ b/src/Clients/Classical/Dialogs/ui/PdfExportDialog.ui
@@ -238,7 +238,7 @@
                         <property name="visible">True</property>
                         <property name="xalign">0</property>
                         <property name="xpad">5</property>
-                        <property name="label" translatable="yes">Number of games per page:</property>
+                        <property name="label" translatable="yes">Pages per side:</property>
                       </object>
                       <packing>
                         <property name="top_attach">1</property>
@@ -248,31 +248,27 @@
                       </packing>
                     </child>
                     <child>
-                      <object class="GtkSpinButton" id="gamesperpage_spinbutton">
+                      <object class="GtkSpinButton" id="games_spinbutton">
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
-                        <property name="adjustment">adjustment2</property>
+                        <property name="adjustment">adjustment3</property>
                         <property name="climb_rate">1</property>
                       </object>
                       <packing>
                         <property name="left_attach">1</property>
                         <property name="right_attach">2</property>
-                        <property name="top_attach">1</property>
-                        <property name="bottom_attach">2</property>
                         <property name="y_options"></property>
                       </packing>
                     </child>
                     <child>
-                      <object class="GtkSpinButton" id="games_spinbutton">
+                      <object class="GtkComboBox" id="layout_combo">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="adjustment">adjustment3</property>
-                        <property name="climb_rate">1</property>
                       </object>
                       <packing>
                         <property name="left_attach">1</property>
                         <property name="right_attach">2</property>
-                        <property name="y_options"></property>
+                        <property name="top_attach">1</property>
+                        <property name="bottom_attach">2</property>
                       </packing>
                     </child>
                   </object>
@@ -351,7 +347,7 @@
                 <property name="can_focus">True</property>
                 <property name="can_default">True</property>
                 <property name="receives_default">False</property>
-                <property name="use_stock">True</property>
+                <property name="use_underline">True</property>
                 <signal name="clicked" handler="OnOK"/>
               </object>
               <packing>
diff --git a/src/Core/Main/PdfExporter.cs b/src/Core/Main/PdfExporter.cs
index 1507fa8..0d324d1 100644
--- a/src/Core/Main/PdfExporter.cs
+++ b/src/Core/Main/PdfExporter.cs
@@ -29,25 +29,48 @@ namespace gbrainy.Core.Main
 	static public class PdfExporter
 	{
 		static readonly int width = 400, height = 400, margin = 20, question_height = 100;
-		static readonly int columns = 2, rows = 2;
 		static readonly int page_margin = 20; // space between vertical and hortizontal pages
 		static readonly int page_width = width + page_margin;
 		static readonly int page_height = height + question_height + page_margin;
+		static int [] pages_side = {1, 2, 4};
+
+		static public int [] PagesPerSide
+		{
+			get { return pages_side; }
+		}
 
 		static public void GeneratePdf (Game [] games, int games_page, string file)
 		{
+			int columns, rows;
+			switch (games_page) {
+			case 1:
+				columns = 1;
+				rows = 1;
+				break;
+			case 2:
+				columns = 2;
+				rows = 1;
+				break;
+			case 4:
+				columns = 2;
+				rows = 2;
+				break;
+			default:
+				throw new InvalidOperationException ("Invalid games per page value");
+			}
+
 			PdfSurface pdf = new PdfSurface (file, page_width * columns, page_height * rows);
 			CairoContextEx cr = new CairoContextEx (pdf, "sans 12", 72);
 
-			GenerateQuestions (cr, games);
-			GenerateAnswers (cr, games);
+			GenerateQuestions (cr, games, columns, rows);
+			GenerateAnswers (cr, games, columns, rows);
 
 			pdf.Finish ();
 			((IDisposable)cr).Dispose();
 			return;
 		}
 
-		static void GenerateQuestions (CairoContextEx cr, Game [] games)
+		static void GenerateQuestions (CairoContextEx cr, Game [] games, int columns, int rows)
 		{
 			int x, y, page;
 			Game puzzle;
@@ -80,6 +103,15 @@ namespace gbrainy.Core.Main
 				// Translate adds always to previous matrix's transformation
 				cr.Translate (0, question_height);
 				puzzle.DrawPreview (cr, width, height, false);
+				if (i == 0) {
+					cr.Save ();
+					cr.SetPangoFontSize (0.02);
+					cr.MoveTo (0.05, 0.95);
+					cr.ShowPangoText (String.Format (Catalog.GetString ("Created by gbrainy {0}"), Defines.VERSION));
+					cr.Stroke ();
+					cr.Restore ();
+				}				
+
 				x += width + margin;
 				if (x > width + margin) {
 					x = 0;
@@ -98,12 +130,13 @@ namespace gbrainy.Core.Main
 				cr.ShowPage ();
 		}
 
-		static void GenerateAnswers (CairoContextEx cr, Game [] games)
+		static void GenerateAnswers (CairoContextEx cr, Game [] games, int columns, int rows)
 		{
 			int x, y, page;
 			Game puzzle;
 			string str;
 			int column, row;
+			const int space_lines = 80;
 
 			x = y = page = 0;
 			column = row = 0;
@@ -112,7 +145,7 @@ namespace gbrainy.Core.Main
 			cr.SetPangoFontSize (20);
 			cr.DrawStringWithWrapping (x + margin, y + margin,
 				Catalog.GetString ("Solutions"), width - margin);
-			y += 75;
+			y += space_lines;
 			cr.Stroke ();
 
 			cr.SetPangoFontSize (12);
@@ -125,10 +158,10 @@ namespace gbrainy.Core.Main
 				cr.DrawStringWithWrapping (x + margin, y + margin, str, width - margin);
 				cr.Stroke ();
 
-				y += 75;
+				y += space_lines;
 
 				// Next lateral page (right)
-				if (y >= page_height * (row + 1) && x + page_width < page_width * columns) {
+				if (y + space_lines >= page_height * (row + 1) && x + page_width < page_width * columns) {
 					column++;
 
 					x = column * page_width;
@@ -136,7 +169,7 @@ namespace gbrainy.Core.Main
 					page++;
 				} else {
 					// No more space (right), new row
-					if (y >= page_height * (row + 1) && x + page_width >= page_width * columns) {
+					if (y + space_lines >= page_height * (row + 1) && x + page_width >= page_width * columns) {
 						row++;
 						column = 0;
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