Added e-printable.c and e-printable.h.

2000-06-10  Christopher James Lahey  <clahey@helixcode.com>

	* Makefile.am: Added e-printable.c and e-printable.h.

	* e-printable.c, e-printable.h: This new class is a printing
	context.  Other classes return an EPrintable which represents a
	context for printing that object.

	* e-util.c, e-util.h: Added
	e_marshal_NONE__OBJECT_DOUBLE_DOUBLE_BOOL and
	e_marshal_DOUBLE__OBJECT_DOUBLE_DOUBLE.

svn path=/trunk/; revision=3510

2 files changed, 230 insertions, 0 deletions

diff --git a/widgets/misc/e-printable.c b/widgets/misc/e-printable.c
new file mode 100644
index 0000000000..27170fef84
--- /dev/null
+++ b/widgets/misc/e-printable.c
@@ -0,0 +1,172 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * e-printable.c: an object printer.
+ *
+ * Author:
+ *   Christopher James Lahey <clahey@helixcode.com>
+ *
+ * (C) 2000 Helix Code, Inc.
+ */
+#include <config.h>
+#include <gtk/gtksignal.h>
+#include "e-util.h"
+#include "e-printable.h"
+
+#define EP_CLASS(e) ((EPrintableClass *)((GtkObject *)e)->klass)
+
+#define PARENT_TYPE gtk_object_get_type ()
+					  
+
+static GtkObjectClass *e_printable_parent_class;
+
+enum {
+	PRINT_PAGE,
+	DATA_LEFT,
+	RESET,
+	HEIGHT,
+	LAST_SIGNAL
+};
+
+static guint e_printable_signals [LAST_SIGNAL] = { 0, };
+
+static void
+e_printable_class_init (GtkObjectClass *object_class)
+{
+	EPrintableClass *klass = E_PRINTABLE_CLASS(object_class);
+	e_printable_parent_class = gtk_type_class (PARENT_TYPE);
+	
+	e_printable_signals [PRINT_PAGE] =
+		gtk_signal_new ("print_page",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EPrintableClass, print_page),
+				e_marshal_NONE__OBJECT_DOUBLE_DOUBLE_BOOL,
+				GTK_TYPE_NONE, 4, GTK_TYPE_OBJECT, GTK_TYPE_DOUBLE, GTK_TYPE_DOUBLE, GTK_TYPE_BOOL);
+
+	e_printable_signals [DATA_LEFT] =
+		gtk_signal_new ("data_left",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EPrintableClass, data_left),
+				gtk_marshal_BOOL__NONE,
+				GTK_TYPE_BOOL, 0, GTK_TYPE_NONE);
+
+	e_printable_signals [RESET] =
+		gtk_signal_new ("reset",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EPrintableClass, reset),
+				gtk_marshal_NONE__NONE,
+				GTK_TYPE_NONE, 0, GTK_TYPE_NONE);
+
+	e_printable_signals [HEIGHT] =
+		gtk_signal_new ("height",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EPrintableClass, height),
+				e_marshal_DOUBLE__OBJECT_DOUBLE_DOUBLE,
+				GTK_TYPE_DOUBLE, 3, GTK_TYPE_OBJECT, GTK_TYPE_DOUBLE, GTK_TYPE_DOUBLE);
+
+	gtk_object_class_add_signals (object_class, e_printable_signals, LAST_SIGNAL);
+
+	klass->print_page = NULL;    
+	klass->data_left = NULL;
+	klass->reset = NULL;
+	klass->height = NULL;
+}
+
+
+guint
+e_printable_get_type (void)
+{
+  static guint type = 0;
+
+  if (!type)
+    {
+      GtkTypeInfo info =
+      {
+	"EPrintable",
+	sizeof (EPrintable),
+	sizeof (EPrintableClass),
+	(GtkClassInitFunc) e_printable_class_init,
+	NULL,
+	/* reserved_1 */ NULL,
+        /* reserved_2 */ NULL,
+        (GtkClassInitFunc) NULL,
+      };
+
+      type = gtk_type_unique (gtk_object_get_type (), &info);
+    }
+
+  return type;
+}
+
+EPrintable *
+e_printable_new(void)
+{
+	return E_PRINTABLE(gtk_type_new(e_printable_get_type()));
+}
+
+void
+e_printable_print_page          (EPrintable        *e_printable,
+				 GnomePrintContext *context,
+				 gdouble            width,
+				 gdouble            height,
+				 gboolean           quantized)
+{
+	g_return_if_fail (e_printable != NULL);
+	g_return_if_fail (E_IS_PRINTABLE (e_printable));
+	
+	gtk_signal_emit (GTK_OBJECT (e_printable),
+			 e_printable_signals [PRINT_PAGE],
+			 context,
+			 width,
+			 height,
+			 quantized);
+}
+
+gboolean
+e_printable_data_left           (EPrintable        *e_printable)
+{
+        gboolean ret_val;
+
+	g_return_val_if_fail (e_printable != NULL, FALSE);
+	g_return_val_if_fail (E_IS_PRINTABLE (e_printable), FALSE);
+
+	gtk_signal_emit (GTK_OBJECT (e_printable),
+			 e_printable_signals [DATA_LEFT],
+			 &ret_val);
+
+	return ret_val;
+}
+
+void
+e_printable_reset               (EPrintable        *e_printable)
+{
+	g_return_if_fail (e_printable != NULL);
+	g_return_if_fail (E_IS_PRINTABLE (e_printable));
+	
+	gtk_signal_emit (GTK_OBJECT (e_printable),
+			 e_printable_signals [RESET]);
+}
+
+gdouble
+e_printable_height              (EPrintable        *e_printable,
+				 GnomePrintContext *context,
+				 gdouble            width,
+				 gdouble            max_height)
+{
+        gdouble ret_val;
+
+	g_return_val_if_fail (e_printable != NULL, -1);
+	g_return_val_if_fail (E_IS_PRINTABLE (e_printable), -1);
+
+	gtk_signal_emit (GTK_OBJECT (e_printable),
+			 e_printable_signals [HEIGHT],
+			 context,
+			 width,
+			 max_height,
+			 &ret_val);
+
+	return ret_val;
+}
diff --git a/widgets/misc/e-printable.h b/widgets/misc/e-printable.h
new file mode 100644
index 0000000000..2f8532e0ec
--- /dev/null
+++ b/widgets/misc/e-printable.h
@@ -0,0 +1,58 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * e-printable.h: an object printer.
+ *
+ * Author:
+ *   Christopher James Lahey <clahey@helixcode.com>
+ *
+ * (C) 2000 Helix Code, Inc.
+ */
+#ifndef _E_PRINTABLE_H_
+#define _E_PRINTABLE_H_
+
+#include <gtk/gtkobject.h>
+#include <libgnomeprint/gnome-print.h>
+
+#define E_PRINTABLE_TYPE        (e_printable_get_type ())
+#define E_PRINTABLE(o)          (GTK_CHECK_CAST ((o), E_PRINTABLE_TYPE, EPrintable))
+#define E_PRINTABLE_CLASS(k)    (GTK_CHECK_CLASS_CAST((k), E_PRINTABLE_TYPE, EPrintableClass))
+#define E_IS_PRINTABLE(o)       (GTK_CHECK_TYPE ((o), E_PRINTABLE_TYPE))
+#define E_IS_PRINTABLE_CLASS(k) (GTK_CHECK_CLASS_TYPE ((k), E_PRINTABLE_TYPE))
+
+typedef struct {
+	GtkObject   base;
+} EPrintable;
+
+typedef struct {
+	GtkObjectClass parent_class;
+
+	/*
+	 * Signals
+	 */
+
+	void        (*print_page)  (EPrintable *etm, GnomePrintContext *context, gdouble width, gdouble height, gboolean quantized);
+	gboolean    (*data_left)   (EPrintable *etm);
+	void        (*reset)       (EPrintable *etm);
+	gdouble     (*height)      (EPrintable *etm, GnomePrintContext *context, gdouble width, gdouble max_height);
+} EPrintableClass;
+
+GtkType     e_printable_get_type (void);
+
+EPrintable *e_printable_new                 (void);
+	
+/*
+ * Routines for emitting signals on the e_table
+ */
+void        e_printable_print_page          (EPrintable        *e_printable,
+					     GnomePrintContext *context,
+					     gdouble            width,
+					     gdouble            height,
+					     gboolean           quantized);
+gboolean    e_printable_data_left           (EPrintable        *e_printable);
+void        e_printable_reset               (EPrintable        *e_printable);
+gdouble     e_printable_height              (EPrintable        *e_printable,
+					     GnomePrintContext *context,
+					     gdouble            width,
+					     gdouble            max_height);
+
+#endif /* _E_PRINTABLE_H_ */