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-rw-r--r--widgets/misc/e-canvas-vbox.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/widgets/misc/e-canvas-vbox.c b/widgets/misc/e-canvas-vbox.c
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+++ b/widgets/misc/e-canvas-vbox.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * e-canvas-vbox.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 <config.h>
+#include <gnome.h>
+#include <math.h>
+#include "e-canvas-vbox.h"
+#include <e-util/e-canvas-utils.h>
+#include <e-util/e-canvas.h>
+#include <e-util/e-util.h>
+
+static void e_canvas_vbox_init (ECanvasVbox *CanvasVbox);
+static void e_canvas_vbox_class_init (ECanvasVboxClass *klass);
+static void e_canvas_vbox_set_arg (GtkObject *o, GtkArg *arg, guint arg_id);
+static void e_canvas_vbox_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
+static void e_canvas_vbox_destroy (GtkObject *object);
+
+static gint e_canvas_vbox_event (GnomeCanvasItem *item, GdkEvent *event);
+static void e_canvas_vbox_realize (GnomeCanvasItem *item);
+
+static void e_canvas_vbox_reflow (GnomeCanvasItem *item, int flags);
+
+static void e_canvas_vbox_real_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item);
+static void e_canvas_vbox_resize_children (GnomeCanvasItem *item);
+
+static GnomeCanvasGroupClass *parent_class = NULL;
+
+/* The arguments we take */
+enum {
+ ARG_0,
+ ARG_WIDTH,
+ ARG_HEIGHT,
+ ARG_SPACING,
+};
+
+GtkType
+e_canvas_vbox_get_type (void)
+{
+ static GtkType type = 0;
+
+ if (!type)
+ {
+ static const GtkTypeInfo info =
+ {
+ "ECanvasVbox",
+ sizeof (ECanvasVbox),
+ sizeof (ECanvasVboxClass),
+ (GtkClassInitFunc) e_canvas_vbox_class_init,
+ (GtkObjectInitFunc) e_canvas_vbox_init,
+ /* reserved_1 */ NULL,
+ /* reserved_2 */ NULL,
+ (GtkClassInitFunc) NULL,
+ };
+
+ type = gtk_type_unique (gnome_canvas_group_get_type (), &info);
+ }
+
+ return type;
+}
+
+static void
+e_canvas_vbox_class_init (ECanvasVboxClass *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 ());
+
+ gtk_object_add_arg_type ("ECanvasVbox::width", GTK_TYPE_DOUBLE,
+ GTK_ARG_READWRITE, ARG_WIDTH);
+ gtk_object_add_arg_type ("ECanvasVbox::height", GTK_TYPE_DOUBLE,
+ GTK_ARG_READABLE, ARG_HEIGHT);
+ gtk_object_add_arg_type ("ECanvasVbox::spacing", GTK_TYPE_DOUBLE,
+ GTK_ARG_READWRITE, ARG_SPACING);
+
+ klass->add_item = e_canvas_vbox_real_add_item;
+
+ object_class->set_arg = e_canvas_vbox_set_arg;
+ object_class->get_arg = e_canvas_vbox_get_arg;
+ object_class->destroy = e_canvas_vbox_destroy;
+
+ /* GnomeCanvasItem method overrides */
+ item_class->event = e_canvas_vbox_event;
+ item_class->realize = e_canvas_vbox_realize;
+}
+
+static void
+e_canvas_vbox_init (ECanvasVbox *vbox)
+{
+ vbox->items = NULL;
+
+ vbox->width = 10;
+ vbox->height = 10;
+ vbox->spacing = 0;
+
+ e_canvas_item_set_reflow_callback(GNOME_CANVAS_ITEM(vbox), e_canvas_vbox_reflow);
+}
+
+static void
+e_canvas_vbox_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
+{
+ GnomeCanvasItem *item;
+ ECanvasVbox *e_canvas_vbox;
+
+ item = GNOME_CANVAS_ITEM (o);
+ e_canvas_vbox = E_CANVAS_VBOX (o);
+
+ switch (arg_id){
+ case ARG_WIDTH:
+ e_canvas_vbox->width = GTK_VALUE_DOUBLE (*arg);
+ e_canvas_vbox_resize_children(item);
+ e_canvas_item_request_reflow(item);
+ break;
+ case ARG_SPACING:
+ e_canvas_vbox->spacing = GTK_VALUE_DOUBLE (*arg);
+ e_canvas_item_request_reflow(item);
+ break;
+ }
+}
+
+static void
+e_canvas_vbox_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
+{
+ ECanvasVbox *e_canvas_vbox;
+
+ e_canvas_vbox = E_CANVAS_VBOX (object);
+
+ switch (arg_id) {
+ case ARG_WIDTH:
+ GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->width;
+ break;
+ case ARG_HEIGHT:
+ GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->height;
+ break;
+ case ARG_SPACING:
+ GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->spacing;
+ break;
+ default:
+ arg->type = GTK_TYPE_INVALID;
+ break;
+ }
+}
+
+static void
+e_canvas_vbox_destroy (GtkObject *object)
+{
+ ECanvasVbox *vbox = E_CANVAS_VBOX(object);
+
+ g_list_foreach(vbox->items, (GFunc) gtk_object_unref, NULL);
+ g_list_free(vbox->items);
+ vbox->items = NULL;
+
+ GTK_OBJECT_CLASS(parent_class)->destroy (object);
+}
+
+static gint
+e_canvas_vbox_event (GnomeCanvasItem *item, GdkEvent *event)
+{
+ gint return_val = TRUE;
+
+ switch (event->type) {
+ case GDK_KEY_PRESS:
+ switch (event->key.keyval) {
+ case GDK_Tab:
+ case GDK_KP_Tab:
+ case GDK_ISO_Left_Tab:
+ case GDK_Left:
+ case GDK_KP_Left:
+ case GDK_Right:
+ case GDK_KP_Right:
+ case GDK_Down:
+ case GDK_KP_Down:
+ case GDK_Up:
+ case GDK_KP_Up:
+ case GDK_Return:
+ case GDK_KP_Enter:
+ return_val = TRUE;
+ break;
+ default:
+ return_val = FALSE;
+ break;
+ }
+ break;
+ default:
+ return_val = FALSE;
+ break;
+ }
+ if (!return_val) {
+ if (GNOME_CANVAS_ITEM_CLASS(parent_class)->event)
+ return GNOME_CANVAS_ITEM_CLASS (parent_class)->event (item, event);
+ }
+ return return_val;
+
+}
+
+static void
+e_canvas_vbox_realize (GnomeCanvasItem *item)
+{
+ if (GNOME_CANVAS_ITEM_CLASS(parent_class)->realize)
+ (* GNOME_CANVAS_ITEM_CLASS(parent_class)->realize) (item);
+
+ e_canvas_vbox_resize_children(item);
+ e_canvas_item_request_reflow(item);
+}
+
+static void
+e_canvas_vbox_remove_item (GnomeCanvasItem *item, ECanvasVbox *vbox)
+{
+ vbox->items = g_list_remove(vbox->items, item);
+ gtk_object_unref(GTK_OBJECT(vbox));
+}
+
+static void
+e_canvas_vbox_real_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item)
+{
+ e_canvas_vbox->items = g_list_append(e_canvas_vbox->items, item);
+ gtk_object_ref(GTK_OBJECT(item));
+ gtk_object_ref(GTK_OBJECT(e_canvas_vbox));
+ gtk_signal_connect(GTK_OBJECT(item), "destroy",
+ GTK_SIGNAL_FUNC(e_canvas_vbox_remove_item), e_canvas_vbox);
+ if ( GTK_OBJECT_FLAGS( e_canvas_vbox ) & GNOME_CANVAS_ITEM_REALIZED ) {
+ gnome_canvas_item_set(item,
+ "width", (double) e_canvas_vbox->width,
+ NULL);
+ e_canvas_item_request_reflow(item);
+ }
+
+}
+
+static void
+e_canvas_vbox_resize_children (GnomeCanvasItem *item)
+{
+ GList *list;
+ ECanvasVbox *e_canvas_vbox;
+
+ e_canvas_vbox = E_CANVAS_VBOX (item);
+ for ( list = e_canvas_vbox->items; list; list = list->next ) {
+ GnomeCanvasItem *child = GNOME_CANVAS_ITEM(list->data);
+ gnome_canvas_item_set(child,
+ "width", (double) e_canvas_vbox->width,
+ NULL);
+ }
+}
+
+static void
+e_canvas_vbox_reflow( GnomeCanvasItem *item, int flags )
+{
+ ECanvasVbox *e_canvas_vbox = E_CANVAS_VBOX(item);
+ if ( GTK_OBJECT_FLAGS( e_canvas_vbox ) & GNOME_CANVAS_ITEM_REALIZED ) {
+
+ gdouble old_height;
+ gdouble running_height;
+
+ old_height = e_canvas_vbox->height;
+
+ running_height = 0;
+
+ if (e_canvas_vbox->items == NULL) {
+ } else {
+ GList *list;
+ gdouble item_height;
+
+ list = e_canvas_vbox->items;
+ gtk_object_get (GTK_OBJECT(list->data),
+ "height", &item_height,
+ NULL);
+ e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
+ (double) 0,
+ (double) running_height);
+ running_height += item_height;
+ list = g_list_next(list);
+
+ for( ; list; list = g_list_next(list)) {
+ running_height += e_canvas_vbox->spacing;
+
+ gtk_object_get (GTK_OBJECT(list->data),
+ "height", &item_height,
+ NULL);
+
+ g_print ("%f\n", running_height);
+
+ e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
+ (double) 0,
+ (double) running_height);
+
+ running_height += item_height;
+ }
+
+ }
+ e_canvas_vbox->height = running_height;
+ if (old_height != e_canvas_vbox->height)
+ e_canvas_item_request_parent_reflow(item);
+ }
+}
+
+void
+e_canvas_vbox_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item)
+{
+ if (E_CANVAS_VBOX_CLASS(GTK_OBJECT(e_canvas_vbox)->klass)->add_item)
+ (E_CANVAS_VBOX_CLASS(GTK_OBJECT(e_canvas_vbox)->klass)->add_item) (e_canvas_vbox, item);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 13:08:12 +0800