diff options
Diffstat (limited to 'widgets/shortcut-bar/e-vscrolled-bar.c')
| -rw-r--r-- | widgets/shortcut-bar/e-vscrolled-bar.c | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/widgets/shortcut-bar/e-vscrolled-bar.c b/widgets/shortcut-bar/e-vscrolled-bar.c deleted file mode 100644 index af23b38a21..0000000000 --- a/widgets/shortcut-bar/e-vscrolled-bar.c +++ /dev/null @@ -1,668 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ - -/* - * Author : - * Damon Chaplin <damon@helixcode.com> - * - * Copyright 1999, Helix Code, Inc. - * - * This program 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 program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - */ - -/* - * EVScrolledBar is like GtkScrolledWindow but only scrolls the child widget - * vertically. It is intended for scrolling narrow vertical bars. - */ - -#include <gtk/gtkarrow.h> -#include <gtk/gtkbutton.h> -#include <gtk/gtksignal.h> - -#include "e-vscrolled-bar.h" - -/* These are the offsets of the up & down buttons from the right and top/bottom - of the widget. */ -#define E_VSCROLLED_BAR_BUTTON_X_OFFSET 2 -#define E_VSCROLLED_BAR_BUTTON_Y_OFFSET 2 - -/* This is the time between scrolls. */ -#define E_VSCROLLED_BAR_SCROLL_TIMEOUT 20 - -static void e_vscrolled_bar_class_init (EVScrolledBarClass *class); -static void e_vscrolled_bar_init (EVScrolledBar *vscrolled_bar); -static void e_vscrolled_bar_destroy (GtkObject *object); -static void e_vscrolled_bar_finalize (GtkObject *object); -static void e_vscrolled_bar_map (GtkWidget *widget); -static void e_vscrolled_bar_unmap (GtkWidget *widget); -static void e_vscrolled_bar_size_request (GtkWidget *widget, - GtkRequisition *requisition); -static void e_vscrolled_bar_size_allocate (GtkWidget *widget, - GtkAllocation *allocation); -static void e_vscrolled_bar_draw (GtkWidget *widget, - GdkRectangle *area); -static void e_vscrolled_bar_add (GtkContainer *container, - GtkWidget *child); -static void e_vscrolled_bar_remove (GtkContainer *container, - GtkWidget *child); -static void e_vscrolled_bar_forall (GtkContainer *container, - gboolean include_internals, - GtkCallback callback, - gpointer callback_data); -static void e_vscrolled_bar_adjustment_changed (GtkAdjustment *adjustment, - gpointer data); -static void e_vscrolled_bar_button_pressed (GtkWidget *button, - EVScrolledBar *vscrolled_bar); -static void e_vscrolled_bar_button_released (GtkWidget *button, - EVScrolledBar *vscrolled_bar); -static void e_vscrolled_bar_button_clicked (GtkWidget *button, - EVScrolledBar *vscrolled_bar); -static gboolean e_vscrolled_bar_timeout_handler (gpointer data); - - -static GtkBinClass *parent_class; - - -GtkType -e_vscrolled_bar_get_type (void) -{ - static GtkType e_vscrolled_bar_type = 0; - - if (!e_vscrolled_bar_type) { - GtkTypeInfo e_vscrolled_bar_info = { - "EVScrolledBar", - sizeof (EVScrolledBar), - sizeof (EVScrolledBarClass), - (GtkClassInitFunc) e_vscrolled_bar_class_init, - (GtkObjectInitFunc) e_vscrolled_bar_init, - NULL, /* reserved 1 */ - NULL, /* reserved 2 */ - (GtkClassInitFunc) NULL - }; - - parent_class = gtk_type_class (GTK_TYPE_BIN); - e_vscrolled_bar_type = gtk_type_unique (GTK_TYPE_BIN, - &e_vscrolled_bar_info); - } - - return e_vscrolled_bar_type; -} - - -static void -e_vscrolled_bar_class_init (EVScrolledBarClass *class) -{ - GtkObjectClass *object_class; - GtkWidgetClass *widget_class; - GtkContainerClass *container_class; - - object_class = (GtkObjectClass *) class; - widget_class = (GtkWidgetClass *) class; - container_class = (GtkContainerClass *) class; - - /* Method override */ - object_class->destroy = e_vscrolled_bar_destroy; - object_class->finalize = e_vscrolled_bar_finalize; - - widget_class->map = e_vscrolled_bar_map; - widget_class->unmap = e_vscrolled_bar_unmap; - widget_class->size_request = e_vscrolled_bar_size_request; - widget_class->size_allocate = e_vscrolled_bar_size_allocate; - widget_class->draw = e_vscrolled_bar_draw; - - container_class->add = e_vscrolled_bar_add; - container_class->remove = e_vscrolled_bar_remove; - container_class->forall = e_vscrolled_bar_forall; -} - - -static void -e_vscrolled_bar_init (EVScrolledBar *vscrolled_bar) -{ - GtkWidget *arrow; - - GTK_WIDGET_SET_FLAGS (vscrolled_bar, GTK_NO_WINDOW); - - gtk_container_set_resize_mode (GTK_CONTAINER (vscrolled_bar), - GTK_RESIZE_QUEUE); - - gtk_widget_push_composite_child (); - - vscrolled_bar->up_button = gtk_button_new (); - gtk_widget_set_composite_name (vscrolled_bar->up_button, - "up_button"); - gtk_widget_set_parent (vscrolled_bar->up_button, - GTK_WIDGET (vscrolled_bar)); - arrow = gtk_arrow_new (GTK_ARROW_UP, GTK_SHADOW_OUT); - gtk_misc_set_padding (GTK_MISC (arrow), 1, 1); - gtk_widget_show (arrow); - gtk_container_add (GTK_CONTAINER (vscrolled_bar->up_button), arrow); - gtk_widget_show (vscrolled_bar->up_button); - gtk_signal_connect_after (GTK_OBJECT (vscrolled_bar->up_button), "pressed", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_pressed), vscrolled_bar); - gtk_signal_connect_after (GTK_OBJECT (vscrolled_bar->up_button), "released", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_released), vscrolled_bar); - gtk_signal_connect (GTK_OBJECT (vscrolled_bar->up_button), "clicked", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_clicked), vscrolled_bar); - - vscrolled_bar->down_button = gtk_button_new (); - gtk_widget_set_composite_name (vscrolled_bar->up_button, - "down_button"); - gtk_widget_set_parent (vscrolled_bar->down_button, - GTK_WIDGET (vscrolled_bar)); - arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT); - gtk_misc_set_padding (GTK_MISC (arrow), 1, 1); - gtk_widget_show (arrow); - gtk_container_add (GTK_CONTAINER (vscrolled_bar->down_button), arrow); - gtk_widget_show (vscrolled_bar->down_button); - gtk_signal_connect_after (GTK_OBJECT (vscrolled_bar->down_button), "pressed", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_pressed), vscrolled_bar); - gtk_signal_connect_after (GTK_OBJECT (vscrolled_bar->down_button), "released", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_released), vscrolled_bar); - gtk_signal_connect (GTK_OBJECT (vscrolled_bar->down_button), "clicked", GTK_SIGNAL_FUNC (e_vscrolled_bar_button_clicked), vscrolled_bar); - - gtk_widget_pop_composite_child (); - - vscrolled_bar->adjustment = NULL; - vscrolled_bar->timeout_id = 0; - vscrolled_bar->scrolling_up = FALSE; - vscrolled_bar->min_distance = -1.0; - vscrolled_bar->button_pressed = FALSE; -} - - -/** - * e_vscrolled_bar_new: - * - * @adjustment: The #GtkAdjustment to use for scrolling, or NULL. - * @Return: A new #EVScrolledBar. - * - * Creates a new #EVScrolledBar with the given adjustment. - **/ -GtkWidget * -e_vscrolled_bar_new (GtkAdjustment *adjustment) -{ - GtkWidget *vscrolled_bar; - - vscrolled_bar = GTK_WIDGET (gtk_type_new (e_vscrolled_bar_get_type ())); - e_vscrolled_bar_set_adjustment (E_VSCROLLED_BAR (vscrolled_bar), - adjustment); - - return vscrolled_bar; -} - - -static void -e_vscrolled_bar_destroy (GtkObject *object) -{ - EVScrolledBar *vscrolled_bar; - - vscrolled_bar = E_VSCROLLED_BAR (object); - - if (vscrolled_bar->timeout_id) { - g_source_remove (vscrolled_bar->timeout_id); - vscrolled_bar->timeout_id = 0; - } - - gtk_widget_unparent (vscrolled_bar->up_button); - gtk_widget_unparent (vscrolled_bar->down_button); - - GTK_OBJECT_CLASS (parent_class)->destroy (object); -} - - -static void -e_vscrolled_bar_finalize (GtkObject *object) -{ - EVScrolledBar *vscrolled_bar; - - vscrolled_bar = E_VSCROLLED_BAR (object); - - gtk_object_unref (GTK_OBJECT (vscrolled_bar->adjustment)); - - GTK_OBJECT_CLASS (parent_class)->finalize (object); -} - - -static void -e_vscrolled_bar_map (GtkWidget *widget) -{ - EVScrolledBar *vscrolled_bar; - GtkAdjustment *adjustment; - - g_return_if_fail (widget != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (widget)); - - vscrolled_bar = E_VSCROLLED_BAR (widget); - - /* chain parent class handler to map self and child */ - GTK_WIDGET_CLASS (parent_class)->map (widget); - - adjustment = vscrolled_bar->adjustment; - - if (GTK_WIDGET_VISIBLE (vscrolled_bar->up_button) - && adjustment->value != adjustment->lower - && !GTK_WIDGET_MAPPED (vscrolled_bar->up_button)) - gtk_widget_map (vscrolled_bar->up_button); - - if (GTK_WIDGET_VISIBLE (vscrolled_bar->down_button) - && adjustment->value < adjustment->upper - adjustment->page_size - && !GTK_WIDGET_MAPPED (vscrolled_bar->down_button)) - gtk_widget_map (vscrolled_bar->down_button); -} - - -static void -e_vscrolled_bar_unmap (GtkWidget *widget) -{ - EVScrolledBar *vscrolled_bar; - - g_return_if_fail (widget != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (widget)); - - vscrolled_bar = E_VSCROLLED_BAR (widget); - - /* chain parent class handler to unmap self and child */ - GTK_WIDGET_CLASS (parent_class)->unmap (widget); - - if (GTK_WIDGET_MAPPED (vscrolled_bar->up_button)) - gtk_widget_unmap (vscrolled_bar->up_button); - - if (GTK_WIDGET_MAPPED (vscrolled_bar->down_button)) - gtk_widget_unmap (vscrolled_bar->down_button); -} - - -static void -e_vscrolled_bar_size_request (GtkWidget *widget, - GtkRequisition *requisition) -{ - EVScrolledBar *vscrolled_bar; - GtkBin *bin; - GtkRequisition child_requisition; - - g_return_if_fail (widget != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (widget)); - g_return_if_fail (requisition != NULL); - - vscrolled_bar = E_VSCROLLED_BAR (widget); - bin = GTK_BIN (widget); - - requisition->width = 0; - requisition->height = 0; - - /* We just return the requisition of the child widget, plus the - border width. */ - if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) { - gtk_widget_size_request (bin->child, &child_requisition); - *requisition = child_requisition; - } - - /* We remember the requested heights of the up & down buttons. */ - gtk_widget_size_request (vscrolled_bar->up_button, - &child_requisition); - vscrolled_bar->up_button_width = child_requisition.width; - vscrolled_bar->up_button_height = child_requisition.height; - - gtk_widget_size_request (vscrolled_bar->down_button, - &child_requisition); - vscrolled_bar->down_button_width = child_requisition.width; - vscrolled_bar->down_button_height = child_requisition.height; - - /* Add on the standard container border widths. */ - requisition->width += GTK_CONTAINER (widget)->border_width * 2; - requisition->height += GTK_CONTAINER (widget)->border_width * 2; -} - - -static void -e_vscrolled_bar_size_allocate (GtkWidget *widget, - GtkAllocation *allocation) -{ - EVScrolledBar *vscrolled_bar; - GtkBin *bin; - GtkAllocation button_allocation, child_allocation; - gint border_width; - - g_return_if_fail (widget != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (widget)); - g_return_if_fail (allocation != NULL); - - vscrolled_bar = E_VSCROLLED_BAR (widget); - bin = GTK_BIN (widget); - - widget->allocation = *allocation; - - border_width = GTK_CONTAINER (widget)->border_width; - - child_allocation.x = border_width; - child_allocation.y = border_width; - child_allocation.width = allocation->width - 2 * border_width; - child_allocation.height = allocation->height - 2 * border_width; - gtk_widget_size_allocate (bin->child, &child_allocation); - - button_allocation.x = allocation->width - border_width - - vscrolled_bar->up_button_width - - E_VSCROLLED_BAR_BUTTON_X_OFFSET; - button_allocation.y = border_width + E_VSCROLLED_BAR_BUTTON_Y_OFFSET; - button_allocation.width = vscrolled_bar->up_button_width; - button_allocation.height = vscrolled_bar->up_button_height; - gtk_widget_size_allocate (vscrolled_bar->up_button, - &button_allocation); - - button_allocation.x = allocation->width - border_width - - vscrolled_bar->down_button_width - - E_VSCROLLED_BAR_BUTTON_X_OFFSET; - button_allocation.y = allocation->height - border_width - - vscrolled_bar->down_button_height - - E_VSCROLLED_BAR_BUTTON_Y_OFFSET; - button_allocation.width = vscrolled_bar->down_button_width; - button_allocation.height = vscrolled_bar->down_button_height; - gtk_widget_size_allocate (vscrolled_bar->down_button, - &button_allocation); -} - - -static void -e_vscrolled_bar_draw (GtkWidget *widget, - GdkRectangle *area) -{ - EVScrolledBar *vscrolled_bar; - GtkBin *bin; - GdkRectangle child_area; - - g_return_if_fail (widget != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (widget)); - g_return_if_fail (area != NULL); - - vscrolled_bar = E_VSCROLLED_BAR (widget); - bin = GTK_BIN (widget); - - if (bin->child && GTK_WIDGET_VISIBLE (bin->child) && - gtk_widget_intersect (bin->child, area, &child_area)) - gtk_widget_draw (bin->child, &child_area); - - if (GTK_WIDGET_DRAWABLE (vscrolled_bar->up_button) && - gtk_widget_intersect (vscrolled_bar->up_button, area, &child_area)) - gtk_widget_draw (vscrolled_bar->up_button, &child_area); - - if (GTK_WIDGET_DRAWABLE (vscrolled_bar->down_button) && - gtk_widget_intersect (vscrolled_bar->down_button, area, &child_area)) - gtk_widget_draw (vscrolled_bar->down_button, &child_area); -} - - -static void -e_vscrolled_bar_add (GtkContainer *container, - GtkWidget *child) -{ - EVScrolledBar *vscrolled_bar; - GtkBin *bin; - - g_return_if_fail (container != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (container)); - - vscrolled_bar = E_VSCROLLED_BAR (container); - bin = GTK_BIN (container); - - g_return_if_fail (bin->child == NULL); - - bin->child = child; - gtk_widget_set_parent (child, GTK_WIDGET (bin)); - - gtk_widget_set_scroll_adjustments (child, NULL, - vscrolled_bar->adjustment); - - if (GTK_WIDGET_REALIZED (child->parent)) - gtk_widget_realize (child); - - if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child)) { - if (GTK_WIDGET_MAPPED (child->parent)) - gtk_widget_map (child); - - gtk_widget_queue_resize (child); - } -} - - -static void -e_vscrolled_bar_remove (GtkContainer *container, - GtkWidget *child) -{ - g_return_if_fail (container != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (container)); - g_return_if_fail (child != NULL); - g_return_if_fail (GTK_BIN (container)->child == child); - - gtk_widget_set_scroll_adjustments (child, NULL, NULL); - - /* chain parent class handler to remove child */ - GTK_CONTAINER_CLASS (parent_class)->remove (container, child); -} - - -static void -e_vscrolled_bar_forall (GtkContainer *container, - gboolean include_internals, - GtkCallback callback, - gpointer callback_data) -{ - g_return_if_fail (container != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (container)); - g_return_if_fail (callback != NULL); - - GTK_CONTAINER_CLASS (parent_class)->forall (container, - include_internals, - callback, - callback_data); - if (include_internals) { - EVScrolledBar *vscrolled_bar; - - vscrolled_bar = E_VSCROLLED_BAR (container); - - if (vscrolled_bar->up_button) - callback (vscrolled_bar->up_button, callback_data); - if (vscrolled_bar->down_button) - callback (vscrolled_bar->down_button, callback_data); - } -} - - -/** - * e_vscrolled_bar_get_adjustment: - * - * @vscrolled_bar: An #EVScrolledBar. - * @Return: The #GtkAdjustment used for scrolling @vscrolled_bar. - * - * Returns the #GtkAdjustment used for scrolling the #EVscrolledBar. - **/ -GtkAdjustment* -e_vscrolled_bar_get_adjustment (EVScrolledBar *vscrolled_bar) -{ - g_return_val_if_fail (vscrolled_bar != NULL, NULL); - g_return_val_if_fail (E_IS_VSCROLLED_BAR (vscrolled_bar), NULL); - - return vscrolled_bar->adjustment; -} - - -/** - * e_vscrolled_bar_set_adjustment: - * - * @vscrolled_bar: An #EVScrolledBar. - * @adjustment: The #GtkAdjustment to use for scrolling @vscrolled_bar. - * - * Sets the #GtkAdjustment to use for scrolling the #EVscrolledBar. - **/ -void -e_vscrolled_bar_set_adjustment (EVScrolledBar *vscrolled_bar, - GtkAdjustment *adjustment) -{ - g_return_if_fail (vscrolled_bar != NULL); - g_return_if_fail (E_IS_VSCROLLED_BAR (vscrolled_bar)); - - if (adjustment) - g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); - else - adjustment = (GtkAdjustment*) gtk_object_new (GTK_TYPE_ADJUSTMENT, NULL); - - if (vscrolled_bar->adjustment == adjustment) - return; - - if (vscrolled_bar->adjustment) { - gtk_signal_disconnect_by_func (GTK_OBJECT (vscrolled_bar->adjustment), - GTK_SIGNAL_FUNC (e_vscrolled_bar_adjustment_changed), - vscrolled_bar); - gtk_object_unref (GTK_OBJECT (vscrolled_bar->adjustment)); - } - - vscrolled_bar->adjustment = adjustment; - gtk_object_ref (GTK_OBJECT (vscrolled_bar->adjustment)); - gtk_object_sink (GTK_OBJECT (vscrolled_bar->adjustment)); - - /* I've used connect_after here to avoid a problem when using a - GnomeCanvas as the child widget. When just using connect it would - leave a blank space when one of the buttons is hidden. We want - the GtkLayout to handle the scrolling before we hide any buttons. */ - gtk_signal_connect_after (GTK_OBJECT (adjustment), "changed", - GTK_SIGNAL_FUNC (e_vscrolled_bar_adjustment_changed), - vscrolled_bar); - gtk_signal_connect_after (GTK_OBJECT (adjustment), "value_changed", - GTK_SIGNAL_FUNC (e_vscrolled_bar_adjustment_changed), - vscrolled_bar); - - e_vscrolled_bar_adjustment_changed (adjustment, vscrolled_bar); - - if (GTK_BIN (vscrolled_bar)->child) - gtk_widget_set_scroll_adjustments (GTK_BIN (vscrolled_bar)->child, NULL, adjustment); -} - - -static void -e_vscrolled_bar_adjustment_changed (GtkAdjustment *adjustment, - gpointer data) -{ - EVScrolledBar *vscrolled_bar; - - g_return_if_fail (adjustment != NULL); - g_return_if_fail (data != NULL); -#if 0 - g_print ("Adjustment changed to: %g\n", adjustment->value); -#endif - vscrolled_bar = E_VSCROLLED_BAR (data); - - if (!GTK_WIDGET_MAPPED (vscrolled_bar)) - return; - - /* If the adjustment value is not 0, show the up button. */ - if (adjustment->value != adjustment->lower) { - gtk_widget_map (vscrolled_bar->up_button); - gdk_window_raise (vscrolled_bar->up_button->window); - } else { - gtk_widget_unmap (vscrolled_bar->up_button); - } - - /* If the adjustment value is less than the maximum value, show the - down button. */ - if (adjustment->value < adjustment->upper - adjustment->page_size) { - gtk_widget_map (vscrolled_bar->down_button); - gdk_window_raise (vscrolled_bar->down_button->window); - } else { - gtk_widget_unmap (vscrolled_bar->down_button); - } -} - - -static void -e_vscrolled_bar_button_pressed (GtkWidget *button, - EVScrolledBar *vscrolled_bar) -{ - if (vscrolled_bar->timeout_id != 0) - g_source_remove (vscrolled_bar->timeout_id); - - vscrolled_bar->timeout_id = g_timeout_add (E_VSCROLLED_BAR_SCROLL_TIMEOUT, e_vscrolled_bar_timeout_handler, vscrolled_bar); - vscrolled_bar->scrolling_up = (button == vscrolled_bar->up_button) ? TRUE : FALSE; - vscrolled_bar->min_distance = vscrolled_bar->adjustment->page_size / 4; - vscrolled_bar->button_pressed = TRUE; - - e_vscrolled_bar_timeout_handler (vscrolled_bar); -} - - -static void -e_vscrolled_bar_button_released (GtkWidget *button, - EVScrolledBar *vscrolled_bar) -{ - vscrolled_bar->button_pressed = FALSE; -} - - -/* This will be called when the user hits the space key to activate the button. - It will also be called just before button_released() is called, but since - we already handle that we simply return if the button is pressed. */ -static void -e_vscrolled_bar_button_clicked (GtkWidget *button, - EVScrolledBar *vscrolled_bar) -{ - if (vscrolled_bar->button_pressed) - return; - - /* We act as if the button is pressed and released immediately. */ - e_vscrolled_bar_button_pressed (button, vscrolled_bar); - vscrolled_bar->button_pressed = FALSE; -} - - -static gboolean -e_vscrolled_bar_timeout_handler (gpointer data) -{ - EVScrolledBar *vscrolled_bar; - GtkAdjustment *adjustment; - gfloat new_value; - gboolean retval = TRUE; - - vscrolled_bar = E_VSCROLLED_BAR (data); - adjustment = vscrolled_bar->adjustment; - - GDK_THREADS_ENTER (); - - /* Check if the user has released the button and we have already - scrolled the minimum distance. */ - if (vscrolled_bar->button_pressed == FALSE - && vscrolled_bar->min_distance <= 0) { - GDK_THREADS_LEAVE (); - return FALSE; - } - - vscrolled_bar->min_distance -= adjustment->step_increment; - - if (vscrolled_bar->scrolling_up) { - new_value = adjustment->value - adjustment->step_increment; - if (new_value <= adjustment->lower) { - new_value = adjustment->lower; - retval = FALSE; - } - } else { - new_value = adjustment->value + adjustment->step_increment; - if (new_value >= adjustment->upper - adjustment->page_size) { - new_value = adjustment->upper - adjustment->page_size; - retval = FALSE; - } - } - - if (adjustment->value != new_value) { - adjustment->value = new_value; - gtk_signal_emit_by_name (GTK_OBJECT (adjustment), - "value_changed"); - } - - GDK_THREADS_LEAVE (); - return retval; -} |