diff options
Diffstat (limited to 'widgets/e-reflow.c')
| -rw-r--r-- | widgets/e-reflow.c | 438 |
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)); +} |