/* 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, see . */ /* * 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 "gtkadjustment.h" #include "gtkcsscustomgadgetprivate.h" #include "gtkintl.h" #include "gtkmarshalers.h" #include "gtkpixelcacheprivate.h" #include "gtkprivate.h" #include "gtkscrollable.h" #include "gtkrenderbackgroundprivate.h" #include "gtkstylecontextprivate.h" #include "gtktypebuiltins.h" #include "gtkwidgetprivate.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 * #GtkGrid, #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. * gtk_container_add() does this automatically if a child that does not * implement #GtkScrollable is added to a #GtkScrolledWindow, so you can * ignore the presence of the viewport. * * The GtkViewport will start scrolling content only if allocated less * than the child widget’s minimum size in a given orientation. * * # CSS nodes * * GtkViewport has a single CSS node with name viewport. */ struct _GtkViewportPrivate { GtkAdjustment *hadjustment; GtkAdjustment *vadjustment; GtkShadowType shadow_type; GdkWindow *bin_window; GdkWindow *view_window; GtkCssGadget *gadget; GtkPixelCache *pixel_cache; /* GtkScrollablePolicy needs to be checked when * driving the scrollable adjustment values */ guint hscroll_policy : 1; guint vscroll_policy : 1; }; enum { PROP_0, PROP_HADJUSTMENT, PROP_VADJUSTMENT, PROP_HSCROLL_POLICY, PROP_VSCROLL_POLICY, PROP_SHADOW_TYPE }; 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_finalize (GObject *object); static void gtk_viewport_destroy (GtkWidget *widget); static void gtk_viewport_realize (GtkWidget *widget); static void gtk_viewport_unrealize (GtkWidget *widget); static void gtk_viewport_map (GtkWidget *widget); static void gtk_viewport_unmap (GtkWidget *widget); static gint gtk_viewport_draw (GtkWidget *widget, cairo_t *cr); static void gtk_viewport_remove (GtkContainer *container, GtkWidget *widget); static void gtk_viewport_add (GtkContainer *container, GtkWidget *widget); 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_get_preferred_width (GtkWidget *widget, gint *minimum_size, gint *natural_size); static void gtk_viewport_get_preferred_height (GtkWidget *widget, gint *minimum_size, gint *natural_size); static void gtk_viewport_get_preferred_width_for_height (GtkWidget *widget, gint height, gint *minimum_size, gint *natural_size); static void gtk_viewport_get_preferred_height_for_width (GtkWidget *widget, gint width, gint *minimum_size, gint *natural_size); static void viewport_set_adjustment (GtkViewport *viewport, GtkOrientation orientation, GtkAdjustment *adjustment); static void gtk_viewport_queue_draw_region (GtkWidget *widget, const cairo_region_t *region); G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN, G_ADD_PRIVATE (GtkViewport) G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL)) static void gtk_viewport_measure (GtkCssGadget *gadget, GtkOrientation orientation, int for_size, int *minimum, int *natural, int *minimum_baseline, int *natural_baseline, gpointer data) { GtkWidget *widget = gtk_css_gadget_get_owner (gadget); GtkWidget *child; *minimum = *natural = 0; child = gtk_bin_get_child (GTK_BIN (widget)); if (child && gtk_widget_get_visible (child)) _gtk_widget_get_preferred_size_for_size (child, orientation, for_size, minimum, natural, NULL, NULL); } static void viewport_set_hadjustment_values (GtkViewport *viewport) { GtkBin *bin = GTK_BIN (viewport); GtkAllocation view_allocation; GtkAdjustment *hadjustment = viewport->priv->hadjustment; GtkWidget *child; gdouble upper, value; gtk_css_gadget_get_content_allocation (viewport->priv->gadget, &view_allocation, NULL); child = gtk_bin_get_child (bin); if (child && gtk_widget_get_visible (child)) { gint minimum_width, natural_width; gint scroll_height; if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM) gtk_widget_get_preferred_height (child, &scroll_height, NULL); else gtk_widget_get_preferred_height (child, NULL, &scroll_height); gtk_widget_get_preferred_width_for_height (child, MAX (view_allocation.height, scroll_height), &minimum_width, &natural_width); if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM) upper = MAX (minimum_width, view_allocation.width); else upper = MAX (natural_width, view_allocation.width); } else upper = view_allocation.width; value = gtk_adjustment_get_value (hadjustment); /* We clamp to the left in RTL mode */ if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL) { gdouble dist = gtk_adjustment_get_upper (hadjustment) - value - gtk_adjustment_get_page_size (hadjustment); value = upper - dist - view_allocation.width; } gtk_adjustment_configure (hadjustment, value, 0, upper, view_allocation.width * 0.1, view_allocation.width * 0.9, view_allocation.width); } static void viewport_set_vadjustment_values (GtkViewport *viewport) { GtkBin *bin = GTK_BIN (viewport); GtkAllocation view_allocation; GtkAdjustment *vadjustment = viewport->priv->vadjustment; GtkWidget *child; gdouble upper; gtk_css_gadget_get_content_allocation (viewport->priv->gadget, &view_allocation, NULL); child = gtk_bin_get_child (bin); if (child && gtk_widget_get_visible (child)) { gint minimum_height, natural_height; gint scroll_width; if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM) gtk_widget_get_preferred_width (child, &scroll_width, NULL); else gtk_widget_get_preferred_width (child, NULL, &scroll_width); gtk_widget_get_preferred_height_for_width (child, MAX (view_allocation.width, scroll_width), &minimum_height, &natural_height); if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM) upper = MAX (minimum_height, view_allocation.height); else upper = MAX (natural_height, view_allocation.height); } else upper = view_allocation.height; gtk_adjustment_configure (vadjustment, gtk_adjustment_get_value (vadjustment), 0, upper, view_allocation.height * 0.1, view_allocation.height * 0.9, view_allocation.height); } static void gtk_viewport_allocate (GtkCssGadget *gadget, const GtkAllocation *allocation, int baseline, GtkAllocation *out_clip, gpointer data) { GtkWidget *widget = gtk_css_gadget_get_owner (gadget); GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; GtkAdjustment *hadjustment = priv->hadjustment; GtkAdjustment *vadjustment = priv->vadjustment; GtkWidget *child; g_object_freeze_notify (G_OBJECT (hadjustment)); g_object_freeze_notify (G_OBJECT (vadjustment)); viewport_set_hadjustment_values (viewport); viewport_set_vadjustment_values (viewport); if (gtk_widget_get_realized (widget)) { gdk_window_move_resize (priv->view_window, allocation->x, allocation->y, allocation->width, allocation->height); gdk_window_move_resize (priv->bin_window, - gtk_adjustment_get_value (hadjustment), - gtk_adjustment_get_value (vadjustment), gtk_adjustment_get_upper (hadjustment), gtk_adjustment_get_upper (vadjustment)); } child = gtk_bin_get_child (GTK_BIN (widget)); if (child && gtk_widget_get_visible (child)) { GtkAllocation child_allocation; child_allocation.x = 0; child_allocation.y = 0; child_allocation.width = gtk_adjustment_get_upper (hadjustment); child_allocation.height = gtk_adjustment_get_upper (vadjustment); gtk_widget_size_allocate (child, &child_allocation); } g_object_thaw_notify (G_OBJECT (hadjustment)); g_object_thaw_notify (G_OBJECT (vadjustment)); } static void draw_bin (cairo_t *cr, gpointer user_data) { GtkWidget *widget = GTK_WIDGET (user_data); GTK_WIDGET_CLASS (gtk_viewport_parent_class)->draw (widget, cr); } static gboolean gtk_viewport_render (GtkCssGadget *gadget, cairo_t *cr, int x, int y, int width, int height, gpointer data) { GtkWidget *widget = gtk_css_gadget_get_owner (gadget); GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; if (gtk_cairo_should_draw_window (cr, priv->bin_window)) { cairo_rectangle_int_t view_rect; cairo_rectangle_int_t canvas_rect; gdk_window_get_position (priv->view_window, &view_rect.x, &view_rect.y); view_rect.width = gdk_window_get_width (priv->view_window); view_rect.height = gdk_window_get_height (priv->view_window); gdk_window_get_position (priv->bin_window, &canvas_rect.x, &canvas_rect.y); canvas_rect.width = gdk_window_get_width (priv->bin_window); canvas_rect.height = gdk_window_get_height (priv->bin_window); _gtk_pixel_cache_draw (priv->pixel_cache, cr, priv->bin_window, &view_rect, &canvas_rect, draw_bin, widget); } return FALSE; } static void gtk_viewport_class_init (GtkViewportClass *class) { GObjectClass *gobject_class; GtkWidgetClass *widget_class; GtkContainerClass *container_class; gobject_class = G_OBJECT_CLASS (class); widget_class = (GtkWidgetClass*) class; container_class = (GtkContainerClass*) class; gobject_class->set_property = gtk_viewport_set_property; gobject_class->get_property = gtk_viewport_get_property; gobject_class->finalize = gtk_viewport_finalize; widget_class->destroy = gtk_viewport_destroy; widget_class->realize = gtk_viewport_realize; widget_class->unrealize = gtk_viewport_unrealize; widget_class->map = gtk_viewport_map; widget_class->unmap = gtk_viewport_unmap; widget_class->draw = gtk_viewport_draw; widget_class->size_allocate = gtk_viewport_size_allocate; widget_class->get_preferred_width = gtk_viewport_get_preferred_width; widget_class->get_preferred_height = gtk_viewport_get_preferred_height; widget_class->get_preferred_width_for_height = gtk_viewport_get_preferred_width_for_height; widget_class->get_preferred_height_for_width = gtk_viewport_get_preferred_height_for_width; widget_class->queue_draw_region = gtk_viewport_queue_draw_region; gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_VIEWPORT); container_class->remove = gtk_viewport_remove; container_class->add = gtk_viewport_add; gtk_container_class_handle_border_width (container_class); /* GtkScrollable implementation */ g_object_class_override_property (gobject_class, PROP_HADJUSTMENT, "hadjustment"); g_object_class_override_property (gobject_class, PROP_VADJUSTMENT, "vadjustment"); g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy"); g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy"); 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|G_PARAM_EXPLICIT_NOTIFY)); gtk_widget_class_set_css_name (widget_class, "viewport"); } 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: viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, g_value_get_object (value)); break; case PROP_VADJUSTMENT: viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, g_value_get_object (value)); break; case PROP_HSCROLL_POLICY: if (viewport->priv->hscroll_policy != g_value_get_enum (value)) { viewport->priv->hscroll_policy = g_value_get_enum (value); gtk_widget_queue_resize (GTK_WIDGET (viewport)); g_object_notify_by_pspec (object, pspec); } break; case PROP_VSCROLL_POLICY: if (viewport->priv->vscroll_policy != g_value_get_enum (value)) { viewport->priv->vscroll_policy = g_value_get_enum (value); gtk_widget_queue_resize (GTK_WIDGET (viewport)); g_object_notify_by_pspec (object, pspec); } 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 = GTK_VIEWPORT (object); GtkViewportPrivate *priv = viewport->priv; switch (prop_id) { case PROP_HADJUSTMENT: g_value_set_object (value, priv->hadjustment); break; case PROP_VADJUSTMENT: g_value_set_object (value, priv->vadjustment); break; case PROP_HSCROLL_POLICY: g_value_set_enum (value, priv->hscroll_policy); break; case PROP_VSCROLL_POLICY: g_value_set_enum (value, priv->vscroll_policy); break; case PROP_SHADOW_TYPE: g_value_set_enum (value, priv->shadow_type); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_viewport_init (GtkViewport *viewport) { GtkWidget *widget; GtkViewportPrivate *priv; GtkCssNode *widget_node; viewport->priv = gtk_viewport_get_instance_private (viewport); priv = viewport->priv; widget = GTK_WIDGET (viewport); gtk_widget_set_has_window (widget, TRUE); gtk_widget_set_redraw_on_allocate (widget, FALSE); priv->shadow_type = GTK_SHADOW_IN; priv->view_window = NULL; priv->bin_window = NULL; priv->hadjustment = NULL; priv->vadjustment = NULL; priv->pixel_cache = _gtk_pixel_cache_new (); widget_node = gtk_widget_get_css_node (widget); priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node, widget, gtk_viewport_measure, gtk_viewport_allocate, gtk_viewport_render, NULL, NULL); gtk_css_gadget_add_class (priv->gadget, GTK_STYLE_CLASS_FRAME); viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, NULL); viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, NULL); } /** * gtk_viewport_new: * @hadjustment: (allow-none): horizontal adjustment * @vadjustment: (allow-none): vertical adjustment * * Creates a new #GtkViewport with the given adjustments, or with default * adjustments if none are given. * * Returns: a new #GtkViewport */ 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)->priv->hadjustment : &(viewport)->priv->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_destroy (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL); viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL); GTK_WIDGET_CLASS (gtk_viewport_parent_class)->destroy (widget); g_clear_pointer (&priv->pixel_cache, _gtk_pixel_cache_free); } static void gtk_viewport_finalize (GObject *object) { GtkViewport *viewport = GTK_VIEWPORT (object); GtkViewportPrivate *priv = viewport->priv; g_clear_object (&priv->gadget); G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object); } /** * gtk_viewport_get_hadjustment: * @viewport: a #GtkViewport. * * Returns the horizontal adjustment of the viewport. * * Returns: (transfer none): the horizontal adjustment of @viewport. * * Deprecated: 3.0: Use gtk_scrollable_get_hadjustment() **/ GtkAdjustment* gtk_viewport_get_hadjustment (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); return viewport->priv->hadjustment; } /** * gtk_viewport_get_vadjustment: * @viewport: a #GtkViewport. * * Returns the vertical adjustment of the viewport. * * Returns: (transfer none): the vertical adjustment of @viewport. * * Deprecated: 3.0: Use gtk_scrollable_get_vadjustment() **/ GtkAdjustment* gtk_viewport_get_vadjustment (GtkViewport *viewport) { g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); return viewport->priv->vadjustment; } static void viewport_set_adjustment (GtkViewport *viewport, GtkOrientation orientation, GtkAdjustment *adjustment) { GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation); if (adjustment && adjustment == *adjustmentp) return; if (!adjustment) 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); else viewport_set_vadjustment_values (viewport); g_signal_connect (adjustment, "value-changed", G_CALLBACK (gtk_viewport_adjustment_value_changed), viewport); 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. * * Deprecated: 3.0: Use gtk_scrollable_set_hadjustment() **/ 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. * * Deprecated: 3.0: Use gtk_scrollable_set_vadjustment() **/ 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"); } /** * 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) { GtkViewportPrivate *priv; GtkWidget *widget; GtkStyleContext *context; g_return_if_fail (GTK_IS_VIEWPORT (viewport)); widget = GTK_WIDGET (viewport); priv = viewport->priv; if ((GtkShadowType) priv->shadow_type != type) { priv->shadow_type = type; context = gtk_widget_get_style_context (widget); if (type != GTK_SHADOW_NONE) gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME); else gtk_style_context_remove_class (context, GTK_STYLE_CLASS_FRAME); gtk_widget_queue_resize (widget); 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(). * * Returns: 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->priv->shadow_type; } /** * gtk_viewport_get_bin_window: * @viewport: a #GtkViewport * * Gets the bin window of the #GtkViewport. * * Returns: (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->priv->bin_window; } /** * gtk_viewport_get_view_window: * @viewport: a #GtkViewport * * Gets the view window of the #GtkViewport. * * Returns: (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->priv->view_window; } static void gtk_viewport_bin_window_invalidate_handler (GdkWindow *window, cairo_region_t *region) { gpointer widget; GtkViewport *viewport; GtkViewportPrivate *priv; gdk_window_get_user_data (window, &widget); viewport = GTK_VIEWPORT (widget); priv = viewport->priv; _gtk_pixel_cache_invalidate (priv->pixel_cache, region); } static void gtk_viewport_queue_draw_region (GtkWidget *widget, const cairo_region_t *region) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; /* There is no way we can know if a region targets the not-currently-visible but in pixel cache region, so we always just invalidate the whole thing whenever the tree view gets a queue draw. This doesn't normally happen in normal scrolling cases anyway. */ _gtk_pixel_cache_invalidate (priv->pixel_cache, NULL); GTK_WIDGET_CLASS (gtk_viewport_parent_class)->queue_draw_region (widget, region); } static void gtk_viewport_realize (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; GtkBin *bin = GTK_BIN (widget); GtkAdjustment *hadjustment = priv->hadjustment; GtkAdjustment *vadjustment = priv->vadjustment; GtkAllocation allocation; GtkAllocation view_allocation; GtkWidget *child; GdkWindow *window; GdkWindowAttr attributes; gint attributes_mask; gint event_mask; gtk_widget_set_realized (widget, TRUE); gtk_widget_get_allocation (widget, &allocation); attributes.x = allocation.x; attributes.y = allocation.y; attributes.width = allocation.width; attributes.height = allocation.height; attributes.window_type = GDK_WINDOW_CHILD; attributes.wclass = GDK_INPUT_OUTPUT; attributes.visual = gtk_widget_get_visual (widget); event_mask = gtk_widget_get_events (widget); attributes.event_mask = event_mask | GDK_SCROLL_MASK | GDK_TOUCH_MASK | GDK_SMOOTH_SCROLL_MASK; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL; window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gtk_widget_set_window (widget, window); gtk_widget_register_window (widget, window); gtk_css_gadget_get_content_allocation (priv->gadget, &view_allocation, NULL); attributes.x = view_allocation.x; attributes.y = view_allocation.y; attributes.width = view_allocation.width; attributes.height = view_allocation.height; attributes.event_mask = 0; priv->view_window = gdk_window_new (window, &attributes, attributes_mask); gtk_widget_register_window (widget, priv->view_window); attributes.x = - gtk_adjustment_get_value (hadjustment); attributes.y = - gtk_adjustment_get_value (vadjustment); attributes.width = gtk_adjustment_get_upper (hadjustment); attributes.height = gtk_adjustment_get_upper (vadjustment); attributes.event_mask = event_mask; priv->bin_window = gdk_window_new (priv->view_window, &attributes, attributes_mask); gtk_widget_register_window (widget, priv->bin_window); gdk_window_set_invalidate_handler (priv->bin_window, gtk_viewport_bin_window_invalidate_handler); child = gtk_bin_get_child (bin); if (child) gtk_widget_set_parent_window (child, priv->bin_window); gdk_window_show (priv->bin_window); gdk_window_show (priv->view_window); } static void gtk_viewport_unrealize (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; gtk_widget_unregister_window (widget, priv->view_window); gdk_window_destroy (priv->view_window); priv->view_window = NULL; gtk_widget_unregister_window (widget, priv->bin_window); gdk_window_destroy (priv->bin_window); priv->bin_window = NULL; GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget); } static void gtk_viewport_map (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; _gtk_pixel_cache_map (priv->pixel_cache); GTK_WIDGET_CLASS (gtk_viewport_parent_class)->map (widget); } static void gtk_viewport_unmap (GtkWidget *widget) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unmap (widget); _gtk_pixel_cache_unmap (priv->pixel_cache); } static gint gtk_viewport_draw (GtkWidget *widget, cairo_t *cr) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)) || gtk_cairo_should_draw_window (cr, priv->bin_window)) gtk_css_gadget_draw (priv->gadget, cr); return FALSE; } static void gtk_viewport_update_pixelcache_opacity (GtkWidget *child, GtkViewport *viewport) { GtkViewportPrivate *priv = viewport->priv; gtk_pixel_cache_set_is_opaque (priv->pixel_cache, gtk_css_style_render_background_is_opaque ( gtk_style_context_lookup_style ( gtk_widget_get_style_context (child)))); } static void gtk_viewport_remove (GtkContainer *container, GtkWidget *child) { GtkViewport *viewport = GTK_VIEWPORT (container); GtkViewportPrivate *priv = viewport->priv; if (g_signal_handlers_disconnect_by_func (child, gtk_viewport_update_pixelcache_opacity, viewport) != 1) { g_assert_not_reached (); } GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->remove (container, child); gtk_pixel_cache_set_is_opaque (priv->pixel_cache, FALSE); } static void gtk_viewport_add (GtkContainer *container, GtkWidget *child) { GtkBin *bin = GTK_BIN (container); GtkViewport *viewport = GTK_VIEWPORT (bin); GtkViewportPrivate *priv = viewport->priv; g_return_if_fail (gtk_bin_get_child (bin) == NULL); gtk_widget_set_parent_window (child, priv->bin_window); GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child); g_signal_connect (child, "style-updated", G_CALLBACK (gtk_viewport_update_pixelcache_opacity), viewport); gtk_viewport_update_pixelcache_opacity (child, viewport); } static void gtk_viewport_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkViewport *viewport = GTK_VIEWPORT (widget); GtkViewportPrivate *priv = viewport->priv; GtkAllocation clip, content_allocation, widget_allocation; /* If our size changed, and we have a shadow, queue a redraw on widget->window to * redraw the shadow correctly. */ gtk_widget_get_allocation (widget, &widget_allocation); if (gtk_widget_get_mapped (widget) && priv->shadow_type != GTK_SHADOW_NONE && (widget_allocation.width != allocation->width || widget_allocation.height != allocation->height)) gdk_window_invalidate_rect (gtk_widget_get_window (widget), NULL, FALSE); gtk_widget_set_allocation (widget, allocation); if (gtk_widget_get_realized (widget)) gdk_window_move_resize (gtk_widget_get_window (widget), allocation->x, allocation->y, allocation->width, allocation->height); content_allocation = *allocation; content_allocation.x = content_allocation.y = 0; gtk_css_gadget_allocate (priv->gadget, &content_allocation, gtk_widget_get_allocated_baseline (widget), &clip); clip.x += allocation->x; clip.y += allocation->y; gtk_widget_set_clip (widget, &clip); } static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data) { GtkViewport *viewport = GTK_VIEWPORT (data); GtkViewportPrivate *priv = viewport->priv; GtkBin *bin = GTK_BIN (data); GtkWidget *child; child = gtk_bin_get_child (bin); if (child && gtk_widget_get_visible (child) && gtk_widget_get_realized (GTK_WIDGET (viewport))) { GtkAdjustment *hadjustment = priv->hadjustment; GtkAdjustment *vadjustment = priv->vadjustment; gint old_x, old_y; gint new_x, new_y; gdk_window_get_position (priv->bin_window, &old_x, &old_y); new_x = - gtk_adjustment_get_value (hadjustment); new_y = - gtk_adjustment_get_value (vadjustment); if (new_x != old_x || new_y != old_y) gdk_window_move (priv->bin_window, new_x, new_y); } } static void gtk_viewport_get_preferred_width (GtkWidget *widget, gint *minimum_size, gint *natural_size) { gtk_css_gadget_get_preferred_size (GTK_VIEWPORT (widget)->priv->gadget, GTK_ORIENTATION_HORIZONTAL, -1, minimum_size, natural_size, NULL, NULL); } static void gtk_viewport_get_preferred_height (GtkWidget *widget, gint *minimum_size, gint *natural_size) { gtk_css_gadget_get_preferred_size (GTK_VIEWPORT (widget)->priv->gadget, GTK_ORIENTATION_VERTICAL, -1, minimum_size, natural_size, NULL, NULL); } static void gtk_viewport_get_preferred_width_for_height (GtkWidget *widget, gint height, gint *minimum_size, gint *natural_size) { gtk_css_gadget_get_preferred_size (GTK_VIEWPORT (widget)->priv->gadget, GTK_ORIENTATION_HORIZONTAL, height, minimum_size, natural_size, NULL, NULL); } static void gtk_viewport_get_preferred_height_for_width (GtkWidget *widget, gint width, gint *minimum_size, gint *natural_size) { gtk_css_gadget_get_preferred_size (GTK_VIEWPORT (widget)->priv->gadget, GTK_ORIENTATION_VERTICAL, width, minimum_size, natural_size, NULL, NULL); }