/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" #include "gtkviewport.h" #include "gtkintl.h" #include "gtkmarshalers.h" #include "gtkprivate.h" #include "gtkalias.h" /** * SECTION:gtkviewport * @Short_description: An adapter which makes widgets scrollable * @Title: GtkViewport * @See_also:#GtkScrolledWindow, #GtkAdjustment * * The #GtkViewport widget acts as an adaptor class, implementing * scrollability for child widgets that lack their own scrolling * capabilities. Use #GtkViewport to scroll child widgets such as * #GtkTable, #GtkBox, and so on. * * If a widget has native scrolling abilities, such as #GtkTextView, * #GtkTreeView or #GtkIconview, it can be added to a #GtkScrolledWindow * with gtk_container_add(). If a widget does not, you must first add the * widget to a #GtkViewport, then add the viewport to the scrolled window. * The convenience function gtk_scrolled_window_add_with_viewport() does * exactly this, so you can ignore the presence of the viewport. */ enum { PROP_0, PROP_HADJUSTMENT, PROP_VADJUSTMENT, PROP_SHADOW_TYPE }; static void gtk_viewport_finalize (GObject *object); static void gtk_viewport_destroy (GtkObject *object); static void gtk_viewport_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_viewport_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport, GtkAdjustment *hadjustment, GtkAdjustment *vadjustment); static void gtk_viewport_realize (GtkWidget *widget); static void gtk_viewport_unrealize (GtkWidget *widget); static void gtk_viewport_paint (GtkWidget *widget, GdkRectangle *area); static gint gtk_viewport_expose (GtkWidget *widget, GdkEventExpose *event); static void gtk_viewport_add (GtkContainer *container, GtkWidget *widget); static void gtk_viewport_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_viewport_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data); static void gtk_viewport_style_set (GtkWidget *widget, GtkStyle *previous_style); G_DEFINE_TYPE (GtkViewport, gtk_viewport, GTK_TYPE_BIN) static void gtk_viewport_class_init (GtkViewportClass *class) { GtkObjectClass *object_class; GObjectClass *gobject_class; GtkWidgetClass *widget_class; GtkContainerClass *container_class; object_class = (GtkObjectClass*) class; gobject_class = G_OBJECT_CLASS (class); widget_class = (GtkWidgetClass*) class; container_class = (GtkContainerClass*) class; gobject_class->finalize = gtk_viewport_finalize; gobject_class->set_property = gtk_viewport_set_property; gobject_class->get_property = gtk_viewport_get_property; object_class->destroy = gtk_viewport_destroy; widget_class->realize = gtk_viewport_realize; widget_class->unrealize = gtk_viewport_unrealize; widget_class->expose_event = gtk_viewport_expose; widget_class->size_request = gtk_viewport_size_request; widget_class->size_allocate = gtk_viewport_size_allocate; widget_class->style_set = gtk_viewport_style_set; container_class->add = gtk_viewport_add; class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments; g_object_class_install_property (gobject_class, PROP_HADJUSTMENT, g_param_spec_object ("hadjustment", P_("Horizontal adjustment"), P_("The GtkAdjustment that determines the values of the horizontal position for this viewport"), GTK_TYPE_ADJUSTMENT, GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (gobject_class, PROP_VADJUSTMENT, g_param_spec_object ("vadjustment", P_("Vertical adjustment"), P_("The GtkAdjustment that determines the values of the vertical position for this viewport"), GTK_TYPE_ADJUSTMENT, GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (gobject_class, PROP_SHADOW_TYPE, g_param_spec_enum ("shadow-type", P_("Shadow type"), P_("Determines how the shadowed box around the viewport is drawn"), GTK_TYPE_SHADOW_TYPE, GTK_SHADOW_IN, GTK_PARAM_READWRITE)); /** * GtkViewport::set-scroll-adjustments * @horizontal: the horizontal #GtkAdjustment * @vertical: the vertical #GtkAdjustment * * Set the scroll adjustments for the viewport. Usually scrolled containers * like #GtkScrolledWindow will emit this signal to connect two instances * of #GtkScrollbar to the scroll directions of the #GtkViewport. */ widget_class->set_scroll_adjustments_signal = g_signal_new (I_("set-scroll-adjustments"), G_OBJECT_CLASS_TYPE (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkViewportClass, set_scroll_adjustments), NULL, NULL, _gtk_marshal_VOID__OBJECT_OBJECT, G_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT); } static void gtk_viewport_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkViewport *viewport; viewport = GTK_VIEWPORT (object); switch (prop_id) { case PROP_HADJUSTMENT: gtk_viewport_set_hadjustment (viewport, g_value_get_object (value)); break; case PROP_VADJUSTMENT: gtk_viewport_set_vadjustment (viewport, g_value_get_object (value)); break; case PROP_SHADOW_TYPE: gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_viewport_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkViewport *viewport; viewport = GTK_VIEWPORT (object); switch (prop_id) { case PROP_HADJUSTMENT: g_value_set_object (value, viewport->hadjustment); break; case PROP_VADJUSTMENT: g_value_set_object (value, viewport->vadjustment); break; case PROP_SHADOW_TYPE: g_value_set_enum (value, viewport->shadow_type); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_viewport_init (GtkViewport *viewport) { gtk_widget_set_has_window (GTK_WIDGET (viewport), TRUE); gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE); gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE); viewport->shadow_type = GTK_SHADOW_IN; viewport->view_window = NULL; viewport->bin_window = NULL; viewport->hadjustment = NULL; viewport->vadjustment = NULL; } /** * gtk_viewport_new: * @hadjustment: horizontal adjustment. * @vadjustment: vertical adjustment. * @returns: a new #GtkViewport. * * Creates a new #GtkViewport with the given adjustments. * **/ GtkWidget* gtk_viewport_new (GtkAdjustment *hadjustment, GtkAdjustment *vadjustment) { GtkWidget *viewport; viewport = g_object_new (GTK_TYPE_VIEWPORT, "hadjustment", hadjustment, "vadjustment", vadjustment, NULL); return viewport; } #define ADJUSTMENT_POINTER(viewport, orientation) \ (((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \ &(viewport)->hadjustment : &(viewport)->vadjustment) static void viewport_disconnect_adjustment (GtkViewport *viewport, GtkOrientation orientation) { GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation); if (*adjustmentp) { g_signal_handlers_disconnect_by_func (*adjustmentp, gtk_viewport_adjustment_value_changed, viewport); g_object_unref (*adjustmentp); *adjustmentp = NULL; } } static void gtk_viewport_finalize (GObject *object) { GtkViewport *viewport = GTK_VIEWPORT (object); viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL); viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL); G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object); } static void gtk_viewport_destroy (GtkObject *object) { GtkViewport *viewport = GTK_VIEWPORT (object); viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL); viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL); GTK_OBJECT_CLASS (gtk_viewport_parent_class)->destroy (object); } /** * gtk_viewport_get_hadjustment: * @viewport: a #GtkViewport. * * Returns the horizontal adjustment of the viewport. * * Return value: (transfer none): the horizontal adjustment of @viewport. **/ GtkAdjustment* gtk_viewport_get_hadjustment (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); if (!viewport->hadjustment) gtk_viewport_set_hadjustment (viewport, NULL); return viewport->hadjustment; } /** * gtk_viewport_get_vadjustment: * @viewport: a #GtkViewport. * * Returns the vertical adjustment of the viewport. * * Return value: (transfer none): the vertical adjustment of @viewport. **/ GtkAdjustment* gtk_viewport_get_vadjustment (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); if (!viewport->vadjustment) gtk_viewport_set_vadjustment (viewport, NULL); return viewport->vadjustment; } static void viewport_get_view_allocation (GtkViewport *viewport, GtkAllocation *view_allocation) { GtkWidget *widget = GTK_WIDGET (viewport); GtkAllocation *allocation = &widget->allocation; gint border_width = GTK_CONTAINER (viewport)->border_width; view_allocation->x = 0; view_allocation->y = 0; if (viewport->shadow_type != GTK_SHADOW_NONE) { view_allocation->x = widget->style->xthickness; view_allocation->y = widget->style->ythickness; } view_allocation->width = MAX (1, allocation->width - view_allocation->x * 2 - border_width * 2); view_allocation->height = MAX (1, allocation->height - view_allocation->y * 2 - border_width * 2); } static void viewport_reclamp_adjustment (GtkAdjustment *adjustment, gboolean *value_changed) { gdouble value = adjustment->value; value = CLAMP (value, 0, adjustment->upper - adjustment->page_size); if (value != adjustment->value) { adjustment->value = value; if (value_changed) *value_changed = TRUE; } else if (value_changed) *value_changed = FALSE; } static void viewport_set_hadjustment_values (GtkViewport *viewport, gboolean *value_changed) { GtkBin *bin = GTK_BIN (viewport); GtkAllocation view_allocation; GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport); gdouble old_page_size; gdouble old_upper; gdouble old_value; viewport_get_view_allocation (viewport, &view_allocation); old_page_size = hadjustment->page_size; old_upper = hadjustment->upper; old_value = hadjustment->value; hadjustment->page_size = view_allocation.width; hadjustment->step_increment = view_allocation.width * 0.1; hadjustment->page_increment = view_allocation.width * 0.9; hadjustment->lower = 0; if (bin->child && gtk_widget_get_visible (bin->child)) { GtkRequisition child_requisition; gtk_widget_get_child_requisition (bin->child, &child_requisition); hadjustment->upper = MAX (child_requisition.width, view_allocation.width); } else hadjustment->upper = view_allocation.width; if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL) { gdouble dist = old_upper - (old_value + old_page_size); hadjustment->value = hadjustment->upper - dist - hadjustment->page_size; viewport_reclamp_adjustment (hadjustment, value_changed); *value_changed = (old_value != hadjustment->value); } else viewport_reclamp_adjustment (hadjustment, value_changed); } static void viewport_set_vadjustment_values (GtkViewport *viewport, gboolean *value_changed) { GtkBin *bin = GTK_BIN (viewport); GtkAllocation view_allocation; GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport); viewport_get_view_allocation (viewport, &view_allocation); vadjustment->page_size = view_allocation.height; vadjustment->step_increment = view_allocation.height * 0.1; vadjustment->page_increment = view_allocation.height * 0.9; vadjustment->lower = 0; if (bin->child && gtk_widget_get_visible (bin->child)) { GtkRequisition child_requisition; gtk_widget_get_child_requisition (bin->child, &child_requisition); vadjustment->upper = MAX (child_requisition.height, view_allocation.height); } else vadjustment->upper = view_allocation.height; viewport_reclamp_adjustment (vadjustment, value_changed); } static void viewport_set_adjustment (GtkViewport *viewport, GtkOrientation orientation, GtkAdjustment *adjustment) { GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation); gboolean value_changed; if (adjustment && adjustment == *adjustmentp) return; if (!adjustment) adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)); viewport_disconnect_adjustment (viewport, orientation); *adjustmentp = adjustment; g_object_ref_sink (adjustment); if (orientation == GTK_ORIENTATION_HORIZONTAL) viewport_set_hadjustment_values (viewport, &value_changed); else viewport_set_vadjustment_values (viewport, &value_changed); g_signal_connect (adjustment, "value-changed", G_CALLBACK (gtk_viewport_adjustment_value_changed), viewport); gtk_adjustment_changed (adjustment); if (value_changed) gtk_adjustment_value_changed (adjustment); else gtk_viewport_adjustment_value_changed (adjustment, viewport); } /** * gtk_viewport_set_hadjustment: * @viewport: a #GtkViewport. * @adjustment: (allow-none): a #GtkAdjustment. * * Sets the horizontal adjustment of the viewport. **/ void gtk_viewport_set_hadjustment (GtkViewport *viewport, GtkAdjustment *adjustment) { g_return_if_fail (GTK_IS_VIEWPORT (viewport)); if (adjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment); g_object_notify (G_OBJECT (viewport), "hadjustment"); } /** * gtk_viewport_set_vadjustment: * @viewport: a #GtkViewport. * @adjustment: (allow-none): a #GtkAdjustment. * * Sets the vertical adjustment of the viewport. **/ void gtk_viewport_set_vadjustment (GtkViewport *viewport, GtkAdjustment *adjustment) { g_return_if_fail (GTK_IS_VIEWPORT (viewport)); if (adjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment); g_object_notify (G_OBJECT (viewport), "vadjustment"); } static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport, GtkAdjustment *hadjustment, GtkAdjustment *vadjustment) { gtk_viewport_set_hadjustment (viewport, hadjustment); gtk_viewport_set_vadjustment (viewport, vadjustment); } /** * gtk_viewport_set_shadow_type: * @viewport: a #GtkViewport. * @type: the new shadow type. * * Sets the shadow type of the viewport. **/ void gtk_viewport_set_shadow_type (GtkViewport *viewport, GtkShadowType type) { g_return_if_fail (GTK_IS_VIEWPORT (viewport)); if ((GtkShadowType) viewport->shadow_type != type) { viewport->shadow_type = type; if (gtk_widget_get_visible (GTK_WIDGET (viewport))) { gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation)); gtk_widget_queue_draw (GTK_WIDGET (viewport)); } g_object_notify (G_OBJECT (viewport), "shadow-type"); } } /** * gtk_viewport_get_shadow_type: * @viewport: a #GtkViewport * * Gets the shadow type of the #GtkViewport. See * gtk_viewport_set_shadow_type(). * Return value: the shadow type **/ GtkShadowType gtk_viewport_get_shadow_type (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE); return viewport->shadow_type; } /** * gtk_viewport_get_bin_window: * @viewport: a #GtkViewport * * Gets the bin window of the #GtkViewport. * * Return value: (transfer none): a #GdkWindow * * Since: 2.20 **/ GdkWindow* gtk_viewport_get_bin_window (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); return viewport->bin_window; } /** * gtk_viewport_get_view_window: * @viewport: a #GtkViewport * * Gets the view window of the #GtkViewport. * * Return value: (transfer none): a #GdkWindow * * Since: 2.22 **/ GdkWindow* gtk_viewport_get_view_window (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); return viewport->view_window; } static void gtk_viewport_realize (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkBin *bin = GTK_BIN (widget); GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport); GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport); gint border_width = GTK_CONTAINER (widget)->border_width; GtkAllocation view_allocation; GdkWindowAttr attributes; gint attributes_mask; gint event_mask; gtk_widget_set_realized (widget, TRUE); attributes.x = widget->allocation.x + border_width; attributes.y = widget->allocation.y + border_width; attributes.width = widget->allocation.width - border_width * 2; attributes.height = widget->allocation.height - border_width * 2; attributes.window_type = GDK_WINDOW_CHILD; attributes.wclass = GDK_INPUT_OUTPUT; attributes.visual = gtk_widget_get_visual (widget); attributes.colormap = gtk_widget_get_colormap (widget); event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK; /* We select on button_press_mask so that button 4-5 scrolls are trapped. */ attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gdk_window_set_user_data (widget->window, viewport); viewport_get_view_allocation (viewport, &view_allocation); attributes.x = view_allocation.x; attributes.y = view_allocation.y; attributes.width = view_allocation.width; attributes.height = view_allocation.height; attributes.event_mask = 0; viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask); gdk_window_set_user_data (viewport->view_window, viewport); gdk_window_set_back_pixmap (viewport->view_window, NULL, FALSE); attributes.x = - hadjustment->value; attributes.y = - vadjustment->value; attributes.width = hadjustment->upper; attributes.height = vadjustment->upper; attributes.event_mask = event_mask; viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask); gdk_window_set_user_data (viewport->bin_window, viewport); if (bin->child) gtk_widget_set_parent_window (bin->child, viewport->bin_window); widget->style = gtk_style_attach (widget->style, widget->window); gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL); gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL); /* Call paint here to allow a theme to set the background without flashing */ gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL, GTK_SHADOW_NONE, NULL, widget, "viewportbin", 0, 0, -1, -1); gdk_window_show (viewport->bin_window); gdk_window_show (viewport->view_window); } static void gtk_viewport_unrealize (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); gdk_window_set_user_data (viewport->view_window, NULL); gdk_window_destroy (viewport->view_window); viewport->view_window = NULL; gdk_window_set_user_data (viewport->bin_window, NULL); gdk_window_destroy (viewport->bin_window); viewport->bin_window = NULL; GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget); } static void gtk_viewport_paint (GtkWidget *widget, GdkRectangle *area) { if (gtk_widget_is_drawable (widget)) { GtkViewport *viewport = GTK_VIEWPORT (widget); gtk_paint_shadow (widget->style, widget->window, GTK_STATE_NORMAL, viewport->shadow_type, area, widget, "viewport", 0, 0, -1, -1); } } static gint gtk_viewport_expose (GtkWidget *widget, GdkEventExpose *event) { GtkViewport *viewport; if (gtk_widget_is_drawable (widget)) { viewport = GTK_VIEWPORT (widget); if (event->window == widget->window) gtk_viewport_paint (widget, &event->area); else if (event->window == viewport->bin_window) { gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL, GTK_SHADOW_NONE, &event->area, widget, "viewportbin", 0, 0, -1, -1); GTK_WIDGET_CLASS (gtk_viewport_parent_class)->expose_event (widget, event); } } return FALSE; } static void gtk_viewport_add (GtkContainer *container, GtkWidget *child) { GtkBin *bin = GTK_BIN (container); g_return_if_fail (bin->child == NULL); gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window); GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child); } static void gtk_viewport_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkBin *bin = GTK_BIN (widget); GtkRequisition child_requisition; requisition->width = GTK_CONTAINER (widget)->border_width; requisition->height = GTK_CONTAINER (widget)->border_width; if (GTK_VIEWPORT (widget)->shadow_type != GTK_SHADOW_NONE) { requisition->width += 2 * widget->style->xthickness; requisition->height += 2 * widget->style->ythickness; } if (bin->child && gtk_widget_get_visible (bin->child)) { gtk_widget_size_request (bin->child, &child_requisition); requisition->width += child_requisition.width; requisition->height += child_requisition.height; } } static void gtk_viewport_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkBin *bin = GTK_BIN (widget); gint border_width = GTK_CONTAINER (widget)->border_width; gboolean hadjustment_value_changed, vadjustment_value_changed; GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport); GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport); GtkAllocation child_allocation; /* If our size changed, and we have a shadow, queue a redraw on widget->window to * redraw the shadow correctly. */ if (gtk_widget_get_mapped (widget) && viewport->shadow_type != GTK_SHADOW_NONE && (widget->allocation.width != allocation->width || widget->allocation.height != allocation->height)) gdk_window_invalidate_rect (widget->window, NULL, FALSE); widget->allocation = *allocation; viewport_set_hadjustment_values (viewport, &hadjustment_value_changed); viewport_set_vadjustment_values (viewport, &vadjustment_value_changed); child_allocation.x = 0; child_allocation.y = 0; child_allocation.width = hadjustment->upper; child_allocation.height = vadjustment->upper; if (gtk_widget_get_realized (widget)) { GtkAllocation view_allocation; gdk_window_move_resize (widget->window, allocation->x + border_width, allocation->y + border_width, allocation->width - border_width * 2, allocation->height - border_width * 2); viewport_get_view_allocation (viewport, &view_allocation); gdk_window_move_resize (viewport->view_window, view_allocation.x, view_allocation.y, view_allocation.width, view_allocation.height); gdk_window_move_resize (viewport->bin_window, - hadjustment->value, - vadjustment->value, child_allocation.width, child_allocation.height); } if (bin->child && gtk_widget_get_visible (bin->child)) gtk_widget_size_allocate (bin->child, &child_allocation); gtk_adjustment_changed (hadjustment); gtk_adjustment_changed (vadjustment); if (hadjustment_value_changed) gtk_adjustment_value_changed (hadjustment); if (vadjustment_value_changed) gtk_adjustment_value_changed (vadjustment); } static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data) { GtkViewport *viewport = GTK_VIEWPORT (data); GtkBin *bin = GTK_BIN (data); if (bin->child && gtk_widget_get_visible (bin->child) && gtk_widget_get_realized (GTK_WIDGET (viewport))) { GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport); GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport); gint old_x, old_y; gint new_x, new_y; gdk_window_get_position (viewport->bin_window, &old_x, &old_y); new_x = - hadjustment->value; new_y = - vadjustment->value; if (new_x != old_x || new_y != old_y) { gdk_window_move (viewport->bin_window, new_x, new_y); gdk_window_process_updates (viewport->bin_window, TRUE); } } } static void gtk_viewport_style_set (GtkWidget *widget, GtkStyle *previous_style) { if (gtk_widget_get_realized (widget) && gtk_widget_get_has_window (widget)) { GtkViewport *viewport = GTK_VIEWPORT (widget); gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL); gtk_style_set_background (widget->style, widget->window, widget->state); } } #define __GTK_VIEWPORT_C__ #include "gtkaliasdef.c"