e_canvas_item_move_absolute is just a helper function not supplied by the

        * widgets/e-canvas-utils.c, widgets/e-canvas-utils.h:
        e_canvas_item_move_absolute is just a helper function not supplied
        by the gnome_canvas.[ch] I put it here so that multiple items can
        use it.

        * widgets/e-reflow.c, widgets/e-reflow.h: This item contains a
        number of other items and places them into multiple columns.  The
        items contained must support a number of arguments and signals to
        allow the reflow to interact with them.

        * widgets/test-reflow.c: This is a test program for e-reflow.

        * widgets/e-text.c, widgets/e-text.h: Added properly drawn
        selected text.  Added some preliminary code for X selection
        handling and cut & paste.

        * widgets/e-minicard.c, widgets/e-minicard.h: Added ARG_HAS_FOCUS
        handling.  Made label display random for more interesting tests of
        multiple cards.  Tweaked sizing information for better display.

        * widgets/e-minicard-label.c, widgets/e-minicard-label.h: Added
        ARG_HAS_FOCUS handling.

        * widgets/Makefile.am: Added the reflow test and reflow files.

svn path=/trunk/; revision=1566

1 files changed, 438 insertions, 0 deletions

diff --git a/widgets/e-reflow.c b/widgets/e-reflow.c
new file mode 100644
index 0000000000..ce2e92e530
--- /dev/null
+++ b/widgets/e-reflow.c
@@ -0,0 +1,438 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * e-reflow.c
+ * Copyright (C) 2000  Helix Code, Inc.
+ * Author: Chris Lahey <clahey@helixcode.com>
+ *
+ * This library 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 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <gnome.h>
+#include "e-reflow.h"
+#include "e-canvas-utils.h"
+static void e_reflow_init		(EReflow		 *card);
+static void e_reflow_class_init	(EReflowClass	 *klass);
+static void e_reflow_set_arg (GtkObject *o, GtkArg *arg, guint arg_id);
+static void e_reflow_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
+static gboolean e_reflow_event (GnomeCanvasItem *item, GdkEvent *event);
+static void e_reflow_realize (GnomeCanvasItem *item);
+static void e_reflow_unrealize (GnomeCanvasItem *item);
+static void e_reflow_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
+				    int x, int y, int width, int height);
+
+static void _update_reflow ( EReflow *reflow );
+static void _resize( GtkObject *object, gpointer data );
+static void _queue_reflow(EReflow *e_reflow);
+
+static GnomeCanvasGroupClass *parent_class = NULL;
+
+enum {
+	E_REFLOW_RESIZE,
+	E_REFLOW_LAST_SIGNAL
+};
+
+static guint e_reflow_signals[E_REFLOW_LAST_SIGNAL] = { 0 };
+
+/* The arguments we take */
+enum {
+	ARG_0,
+	ARG_WIDTH,
+	ARG_HEIGHT
+};
+
+GtkType
+e_reflow_get_type (void)
+{
+  static GtkType reflow_type = 0;
+
+  if (!reflow_type)
+    {
+      static const GtkTypeInfo reflow_info =
+      {
+        "EReflow",
+        sizeof (EReflow),
+        sizeof (EReflowClass),
+        (GtkClassInitFunc) e_reflow_class_init,
+        (GtkObjectInitFunc) e_reflow_init,
+        /* reserved_1 */ NULL,
+        /* reserved_2 */ NULL,
+        (GtkClassInitFunc) NULL,
+      };
+
+      reflow_type = gtk_type_unique (gnome_canvas_group_get_type (), &reflow_info);
+    }
+
+  return reflow_type;
+}
+
+static void
+e_reflow_class_init (EReflowClass *klass)
+{
+  GtkObjectClass *object_class;
+  GnomeCanvasItemClass *item_class;
+
+  object_class = (GtkObjectClass*) klass;
+  item_class = (GnomeCanvasItemClass *) klass;
+
+  parent_class = gtk_type_class (gnome_canvas_group_get_type ());
+  
+  e_reflow_signals[E_REFLOW_RESIZE] =
+	  gtk_signal_new ("resize",
+			  GTK_RUN_LAST,
+			  object_class->type,
+			  GTK_SIGNAL_OFFSET (EReflowClass, resize),
+			  gtk_marshal_NONE__NONE,
+			  GTK_TYPE_NONE, 0);
+
+  gtk_object_class_add_signals (object_class, e_reflow_signals, E_REFLOW_LAST_SIGNAL);
+  
+  gtk_object_add_arg_type ("EReflow::width", GTK_TYPE_DOUBLE, 
+			   GTK_ARG_READABLE, ARG_WIDTH); 
+  gtk_object_add_arg_type ("EReflow::height", GTK_TYPE_DOUBLE, 
+			   GTK_ARG_READWRITE, ARG_HEIGHT);
+ 
+  object_class->set_arg = e_reflow_set_arg;
+  object_class->get_arg = e_reflow_get_arg;
+  /*  object_class->destroy = e_reflow_destroy; */
+  
+  /* GnomeCanvasItem method overrides */
+  item_class->event       = e_reflow_event;
+  item_class->realize     = e_reflow_realize;
+  item_class->unrealize   = e_reflow_unrealize;
+  /*  item_class->draw        = e_reflow_draw;*/
+}
+
+static void
+e_reflow_init (EReflow *reflow)
+{
+  /*   reflow->card = NULL;*/
+  reflow->items = NULL;
+  reflow->columns = NULL;
+  reflow->column_width = 150;
+
+  reflow->width = 10;
+  reflow->height = 10;
+  reflow->idle = 0;
+}
+
+static void
+e_reflow_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
+{
+	GnomeCanvasItem *item;
+	EReflow *e_reflow;
+
+	item = GNOME_CANVAS_ITEM (o);
+	e_reflow = E_REFLOW (o);
+	
+	switch (arg_id){
+	case ARG_HEIGHT:
+	  e_reflow->height = GTK_VALUE_DOUBLE (*arg);
+	  _update_reflow(e_reflow);
+	  gnome_canvas_item_request_update (item);
+	  break;
+	}
+}
+
+static void
+e_reflow_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
+{
+	EReflow *e_reflow;
+
+	e_reflow = E_REFLOW (object);
+
+	switch (arg_id) {
+	case ARG_WIDTH:
+	  GTK_VALUE_DOUBLE (*arg) = e_reflow->width;
+	  break;
+	case ARG_HEIGHT:
+	  GTK_VALUE_DOUBLE (*arg) = e_reflow->height;
+	  break;
+	default:
+	  arg->type = GTK_TYPE_INVALID;
+	  break;
+	}
+}
+
+static void
+e_reflow_realize (GnomeCanvasItem *item)
+{
+	EReflow *e_reflow;
+	GnomeCanvasGroup *group;
+	GList *list;
+
+	e_reflow = E_REFLOW (item);
+	group = GNOME_CANVAS_GROUP( item );
+
+	if (GNOME_CANVAS_ITEM_CLASS(parent_class)->realize)
+		(* GNOME_CANVAS_ITEM_CLASS(parent_class)->realize) (item);
+	
+	for(list = e_reflow->items; list; list = g_list_next(list)) {
+		GnomeCanvasItem *item = GNOME_CANVAS_ITEM(list->data);
+		gtk_signal_connect(GTK_OBJECT(item),
+				   "resize",
+				   GTK_SIGNAL_FUNC(_resize),
+				   (gpointer) e_reflow);
+		gnome_canvas_item_set(item,
+				      "width", (double) e_reflow->column_width,
+				      NULL);
+	}
+
+	_update_reflow( e_reflow );
+	
+	if (!item->canvas->aa) {
+	}
+}
+
+static void
+e_reflow_unrealize (GnomeCanvasItem *item)
+{
+  EReflow *e_reflow;
+
+  e_reflow = E_REFLOW (item);
+
+  if (!item->canvas->aa)
+    {
+    }
+  
+  g_list_free (e_reflow->items);
+  g_list_free (e_reflow->columns);
+
+  if (GNOME_CANVAS_ITEM_CLASS(parent_class)->unrealize)
+    (* GNOME_CANVAS_ITEM_CLASS(parent_class)->unrealize) (item);
+}
+
+static gboolean
+e_reflow_event (GnomeCanvasItem *item, GdkEvent *event)
+{
+  EReflow *e_reflow;
+ 
+  e_reflow = E_REFLOW (item);
+
+  switch( event->type )
+    {
+    case GDK_KEY_PRESS:
+	    if (event->key.length == 1 && event->key.string[0] == '\t') {
+		    GList *list;
+		    for (list = e_reflow->items; list; list = list->next) {
+			    GnomeCanvasItem *item = GNOME_CANVAS_ITEM (list->data);
+			    gboolean has_focus;
+			    gtk_object_get(GTK_OBJECT(item),
+					   "has_focus", &has_focus,
+					   NULL);
+			    if (has_focus) {
+				    if (event->key.state & GDK_SHIFT_MASK)
+					    list = list->prev;
+				    else
+					    list = list->next;
+				    if (list) {
+					    item = GNOME_CANVAS_ITEM(list->data);
+					    gnome_canvas_item_set(item,
+								  "has_focus", TRUE,
+								  NULL);
+					    return 1;
+				    } else {
+					    return 0;
+				    }
+			    }
+		    }
+	    }
+    default:
+      break;
+    }
+  
+  if (GNOME_CANVAS_ITEM_CLASS( parent_class )->event)
+	  return (* GNOME_CANVAS_ITEM_CLASS( parent_class )->event) (item, event);
+  else
+	  return 0;
+}
+
+void
+e_reflow_add_item(EReflow *e_reflow, GnomeCanvasItem *item)
+{
+	e_reflow->items = g_list_append(e_reflow->items, item);
+	if ( GTK_OBJECT_FLAGS( e_reflow ) & GNOME_CANVAS_ITEM_REALIZED ) {
+		gtk_signal_connect(GTK_OBJECT(item),
+				   "resize",
+				   GTK_SIGNAL_FUNC(_resize),
+				   (gpointer) e_reflow);
+		gnome_canvas_item_set(item,
+				      "width", (double) e_reflow->column_width,
+				      NULL);
+		_queue_reflow(e_reflow);
+	}
+
+}
+#if 0
+static void e_reflow_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
+				    int x, int y, int width, int height)
+{
+	int x_rect, y_rect, width_rect, height_rect;
+	gint running_width;
+	EReflow *e_reflow = E_REFLOW(item);
+	int i;
+
+	if (GNOME_CANVAS_ITEM_CLASS(parent_class)->draw)
+		GNOME_CANVAS_ITEM_CLASS(parent_class)->draw (item, drawable, x, y, width, height);
+
+	running_width = 7 + e_reflow->column_width + 7;
+	x_rect = running_width;
+	y_rect = 7;
+	width_rect = 2;
+	height_rect = e_reflow->height - 14;
+
+	for (i = 0; i < e_reflow->column_count - 1; i++) {
+		x_rect = running_width;
+		gtk_paint_flat_box(GTK_WIDGET(item->canvas)->style,
+				   drawable,
+				   GTK_STATE_ACTIVE,
+				   GTK_SHADOW_NONE,
+				   NULL,
+				   GTK_WIDGET(item->canvas),
+				   "reflow",
+				   x_rect - x,
+				   y_rect - x,
+				   width_rect,
+				   height_rect);
+		running_width += 2 + 7 + e_reflow->column_width + 7;
+	}
+}
+#endif
+
+static void
+_reflow( EReflow *e_reflow )
+{
+	int running_height;
+	GList *list;
+	double item_height;
+
+	if (e_reflow->columns) {
+		g_list_free (e_reflow->columns);
+		e_reflow->columns = NULL;
+	}
+
+	e_reflow->column_count = 0;
+
+	if (e_reflow->items == NULL) {
+		e_reflow->columns = NULL;
+		e_reflow->column_count = 1;
+		return;
+	}
+
+	list = e_reflow->items;
+	
+	gtk_object_get (GTK_OBJECT(list->data),
+			"height", &item_height,
+			NULL);
+	running_height = 7 + item_height + 7;
+	e_reflow->columns = g_list_append (e_reflow->columns, list);
+	e_reflow->column_count = 1;
+
+	list = g_list_next(list);
+
+	for ( ; list; list = g_list_next(list)) {
+		gtk_object_get (GTK_OBJECT(list->data),
+				"height", &item_height,
+				NULL);
+		if (running_height + item_height + 7 > e_reflow->height) {
+			running_height = 7 + item_height + 7;
+			e_reflow->columns = g_list_append (e_reflow->columns, list);
+			e_reflow->column_count ++;
+		} else {
+			running_height += item_height + 7;
+		}
+	}
+}
+
+static void
+_update_reflow( EReflow *e_reflow )
+{
+	if ( GTK_OBJECT_FLAGS( e_reflow ) & GNOME_CANVAS_ITEM_REALIZED ) {
+
+		gint old_width;
+		gint running_width;
+
+		_reflow (e_reflow);
+		
+		old_width = e_reflow->width;
+		
+		running_width = 7;
+
+		if (e_reflow->items == NULL) {
+		} else {
+			GList *list;
+			GList *next_column;
+			gdouble item_height;
+			gint running_height;
+
+			running_height = 7;
+			
+			list = e_reflow->items;
+			gtk_object_get (GTK_OBJECT(list->data),
+					"height", &item_height,
+					NULL);
+			e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
+						    (double) running_width,
+						    (double) running_height);
+			running_height += item_height + 7;
+			next_column = g_list_next(e_reflow->columns);
+			list = g_list_next(list);
+			
+			for( ; list; list = g_list_next(list)) {
+				gtk_object_get (GTK_OBJECT(list->data),
+						"height", &item_height,
+						NULL);
+
+				if (next_column && (next_column->data == list)) {
+					next_column = g_list_next (next_column);
+					running_height = 7;
+					running_width += e_reflow->column_width + 7 + 2 + 7;
+				}
+				e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
+							    (double) running_width,
+							    (double) running_height);
+
+				running_height += item_height + 7;
+			}
+				 
+		}
+		e_reflow->width = running_width + e_reflow->column_width + 7;
+		if (old_width != e_reflow->width)
+			gtk_signal_emit_by_name (GTK_OBJECT (e_reflow), "resize");
+	}
+}
+
+
+static gboolean
+_idle_reflow(gpointer data)
+{
+	EReflow *e_reflow = E_REFLOW(data);
+	_update_reflow(e_reflow);
+	e_reflow->idle = 0;
+	return FALSE;
+}
+
+static void
+_queue_reflow(EReflow *e_reflow)
+{
+	if (e_reflow->idle == 0)
+		e_reflow->idle = g_idle_add(_idle_reflow, e_reflow);
+}
+
+static void
+_resize( GtkObject *object, gpointer data )
+{
+	_queue_reflow(E_REFLOW(data));
+}