| /* 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * 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 "gtkintl.h" |
| #include "gtkmarshalers.h" |
| #include "gtkprivate.h" |
| #include "gtkscrollable.h" |
| #include "gtktypebuiltins.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. |
| * The convenience function gtk_scrolled_window_add_with_viewport() does |
| * exactly this, 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. |
| */ |
| |
| struct _GtkViewportPrivate |
| { |
| GtkAdjustment *hadjustment; |
| GtkAdjustment *vadjustment; |
| GtkShadowType shadow_type; |
| |
| GdkWindow *bin_window; |
| GdkWindow *view_window; |
| |
| /* 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_destroy (GtkWidget *widget); |
| static void gtk_viewport_realize (GtkWidget *widget); |
| static void gtk_viewport_unrealize (GtkWidget *widget); |
| static gint gtk_viewport_draw (GtkWidget *widget, |
| cairo_t *cr); |
| 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_style_updated (GtkWidget *widget); |
| |
| 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 viewport_set_adjustment (GtkViewport *viewport, |
| GtkOrientation orientation, |
| GtkAdjustment *adjustment); |
| |
| G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN, |
| G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL)) |
| |
| 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; |
| |
| widget_class->destroy = gtk_viewport_destroy; |
| widget_class->realize = gtk_viewport_realize; |
| widget_class->unrealize = gtk_viewport_unrealize; |
| widget_class->draw = gtk_viewport_draw; |
| widget_class->size_allocate = gtk_viewport_size_allocate; |
| widget_class->style_updated = gtk_viewport_style_updated; |
| widget_class->get_preferred_width = gtk_viewport_get_preferred_width; |
| widget_class->get_preferred_height = gtk_viewport_get_preferred_height; |
| |
| gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_VIEWPORT); |
| |
| container_class->add = gtk_viewport_add; |
| |
| /* 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_type_class_add_private (class, sizeof (GtkViewportPrivate)); |
| } |
| |
| 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: |
| viewport->priv->hscroll_policy = g_value_get_enum (value); |
| gtk_widget_queue_resize (GTK_WIDGET (viewport)); |
| break; |
| case PROP_VSCROLL_POLICY: |
| viewport->priv->vscroll_policy = g_value_get_enum (value); |
| gtk_widget_queue_resize (GTK_WIDGET (viewport)); |
| 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) |
| { |
| GtkViewportPrivate *priv; |
| |
| viewport->priv = G_TYPE_INSTANCE_GET_PRIVATE (viewport, |
| GTK_TYPE_VIEWPORT, |
| GtkViewportPrivate); |
| priv = viewport->priv; |
| |
| 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); |
| |
| priv->shadow_type = GTK_SHADOW_IN; |
| priv->view_window = NULL; |
| priv->bin_window = NULL; |
| priv->hadjustment = NULL; |
| priv->vadjustment = NULL; |
| |
| viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, NULL); |
| viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, NULL); |
| } |
| |
| /** |
| * gtk_viewport_new: |
| * @hadjustment: horizontal adjustment |
| * @vadjustment: vertical adjustment |
| * |
| * Creates a new #GtkViewport with the given adjustments. |
| * |
| * 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); |
| |
| viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL); |
| viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL); |
| |
| GTK_WIDGET_CLASS (gtk_viewport_parent_class)->destroy (widget); |
| } |
| |
| static void |
| viewport_get_view_allocation (GtkViewport *viewport, |
| GtkAllocation *view_allocation) |
| { |
| GtkViewportPrivate *priv = viewport->priv; |
| GtkWidget *widget = GTK_WIDGET (viewport); |
| GtkAllocation allocation; |
| GtkStyleContext *context; |
| GtkStateFlags state; |
| GtkBorder padding, border; |
| guint border_width; |
| |
| gtk_widget_get_allocation (widget, &allocation); |
| border_width = gtk_container_get_border_width (GTK_CONTAINER (viewport)); |
| |
| view_allocation->x = 0; |
| view_allocation->y = 0; |
| |
| context = gtk_widget_get_style_context (widget); |
| state = gtk_widget_get_state_flags (widget); |
| gtk_style_context_save (context); |
| gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME); |
| |
| gtk_style_context_get_padding (context, state, &padding); |
| gtk_style_context_get_border (context, state, &border); |
| |
| gtk_style_context_restore (context); |
| |
| if (priv->shadow_type != GTK_SHADOW_NONE) |
| { |
| view_allocation->x = border.left; |
| view_allocation->y = border.top; |
| } |
| |
| view_allocation->x += padding.left; |
| view_allocation->y += padding.top; |
| view_allocation->width = MAX (1, allocation.width - padding.left - padding.right - border_width * 2); |
| view_allocation->height = MAX (1, allocation.height - padding.top - padding.bottom - border_width * 2); |
| |
| if (priv->shadow_type != GTK_SHADOW_NONE) |
| { |
| view_allocation->width = MAX (1, view_allocation->width - border.left - border.right); |
| view_allocation->height = MAX (1, view_allocation->height - border.top - border.bottom); |
| } |
| } |
| |
| /** |
| * gtk_viewport_get_hadjustment: |
| * @viewport: a #GtkViewport. |
| * |
| * Returns the horizontal adjustment of the viewport. |
| * |
| * Return value: (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. |
| * |
| * Return value: (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_hadjustment_values (GtkViewport *viewport) |
| { |
| GtkBin *bin = GTK_BIN (viewport); |
| GtkAllocation view_allocation; |
| GtkAdjustment *hadjustment = viewport->priv->hadjustment; |
| GtkWidget *child; |
| gdouble upper, value; |
| |
| viewport_get_view_allocation (viewport, &view_allocation); |
| |
| 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; |
| |
| viewport_get_view_allocation (viewport, &view_allocation); |
| |
| 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 |
| 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; |
| GtkAllocation allocation; |
| GtkWidget *widget; |
| |
| 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; |
| |
| if (gtk_widget_get_visible (widget)) |
| { |
| gtk_widget_get_allocation (widget, &allocation); |
| gtk_widget_size_allocate (widget, &allocation); |
| gtk_widget_set_allocation (widget, &allocation); |
| gtk_widget_queue_draw (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(). |
| * |
| * 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->priv->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->priv->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->priv->view_window; |
| } |
| |
| 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; |
| GtkStyleContext *context; |
| GtkWidget *child; |
| GdkWindow *window; |
| GdkWindowAttr attributes; |
| gint attributes_mask; |
| gint event_mask; |
| guint border_width; |
| |
| border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); |
| |
| gtk_widget_set_realized (widget, TRUE); |
| |
| gtk_widget_get_allocation (widget, &allocation); |
| |
| attributes.x = allocation.x + border_width; |
| attributes.y = allocation.y + border_width; |
| attributes.width = allocation.width - border_width * 2; |
| attributes.height = allocation.height - border_width * 2; |
| 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) | GDK_EXPOSURE_MASK; |
| |
| 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); |
| gdk_window_set_user_data (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; |
| |
| priv->view_window = gdk_window_new (window, |
| &attributes, attributes_mask); |
| gdk_window_set_user_data (priv->view_window, viewport); |
| |
| 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); |
| gdk_window_set_user_data (priv->bin_window, viewport); |
| |
| child = gtk_bin_get_child (bin); |
| if (child) |
| gtk_widget_set_parent_window (child, priv->bin_window); |
| |
| context = gtk_widget_get_style_context (widget); |
| gtk_style_context_set_background (context, window); |
| gtk_style_context_set_background (context, 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; |
| |
| gdk_window_set_user_data (priv->view_window, NULL); |
| gdk_window_destroy (priv->view_window); |
| priv->view_window = NULL; |
| |
| gdk_window_set_user_data (priv->bin_window, NULL); |
| gdk_window_destroy (priv->bin_window); |
| priv->bin_window = NULL; |
| |
| GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget); |
| } |
| |
| static gint |
| gtk_viewport_draw (GtkWidget *widget, |
| cairo_t *cr) |
| { |
| GtkViewport *viewport = GTK_VIEWPORT (widget); |
| GtkViewportPrivate *priv = viewport->priv; |
| GtkStyleContext *context; |
| int x, y; |
| |
| context = gtk_widget_get_style_context (widget); |
| |
| if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)) && |
| priv->shadow_type != GTK_SHADOW_NONE) |
| { |
| gtk_style_context_save (context); |
| gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME); |
| |
| gtk_render_frame (context, cr, 0, 0, |
| gdk_window_get_width (gtk_widget_get_window (widget)), |
| gdk_window_get_height (gtk_widget_get_window (widget))); |
| |
| gtk_style_context_restore (context); |
| } |
| |
| if (gtk_cairo_should_draw_window (cr, priv->view_window)) |
| { |
| /* This is a cute hack to ensure the contents of bin_window are |
| * restricted to where they are visible. We only need to do this |
| * clipping when called via gtk_widget_draw() and not in expose |
| * events. And when that happens every window (including this one) |
| * should be drawn. |
| */ |
| gdk_window_get_position (priv->view_window, &x, &y); |
| cairo_rectangle (cr, x, y, |
| gdk_window_get_width (priv->view_window), |
| gdk_window_get_height (priv->view_window)); |
| cairo_clip (cr); |
| } |
| |
| if (gtk_cairo_should_draw_window (cr, priv->bin_window)) |
| { |
| gdk_window_get_position (priv->bin_window, &x, &y); |
| gtk_render_background (context, cr, x, y, |
| gdk_window_get_width (priv->bin_window), |
| gdk_window_get_height (priv->bin_window)); |
| |
| GTK_WIDGET_CLASS (gtk_viewport_parent_class)->draw (widget, cr); |
| } |
| |
| return 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); |
| } |
| |
| static void |
| gtk_viewport_size_allocate (GtkWidget *widget, |
| GtkAllocation *allocation) |
| { |
| GtkAllocation widget_allocation; |
| GtkViewport *viewport = GTK_VIEWPORT (widget); |
| GtkViewportPrivate *priv = viewport->priv; |
| GtkBin *bin = GTK_BIN (widget); |
| guint border_width; |
| GtkAdjustment *hadjustment = priv->hadjustment; |
| GtkAdjustment *vadjustment = priv->vadjustment; |
| GtkAllocation child_allocation; |
| GtkWidget *child; |
| |
| border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); |
| |
| /* 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); |
| |
| g_object_freeze_notify (G_OBJECT (hadjustment)); |
| g_object_freeze_notify (G_OBJECT (vadjustment)); |
| |
| viewport_set_hadjustment_values (viewport); |
| viewport_set_vadjustment_values (viewport); |
| |
| child_allocation.x = 0; |
| child_allocation.y = 0; |
| child_allocation.width = gtk_adjustment_get_upper (hadjustment); |
| child_allocation.height = gtk_adjustment_get_upper (vadjustment); |
| if (gtk_widget_get_realized (widget)) |
| { |
| GtkAllocation view_allocation; |
| |
| gdk_window_move_resize (gtk_widget_get_window (widget), |
| 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 (priv->view_window, |
| view_allocation.x, |
| view_allocation.y, |
| view_allocation.width, |
| view_allocation.height); |
| gdk_window_move_resize (priv->bin_window, |
| - gtk_adjustment_get_value (hadjustment), |
| - gtk_adjustment_get_value (vadjustment), |
| child_allocation.width, |
| child_allocation.height); |
| } |
| |
| child = gtk_bin_get_child (bin); |
| if (child && gtk_widget_get_visible (child)) |
| gtk_widget_size_allocate (child, &child_allocation); |
| |
| g_object_thaw_notify (G_OBJECT (hadjustment)); |
| g_object_thaw_notify (G_OBJECT (vadjustment)); |
| } |
| |
| 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_style_updated (GtkWidget *widget) |
| { |
| GTK_WIDGET_CLASS (gtk_viewport_parent_class)->style_updated (widget); |
| |
| if (gtk_widget_get_realized (widget) && |
| gtk_widget_get_has_window (widget)) |
| { |
| GtkStyleContext *context; |
| GtkViewport *viewport = GTK_VIEWPORT (widget); |
| GtkViewportPrivate *priv = viewport->priv; |
| |
| context = gtk_widget_get_style_context (widget); |
| gtk_style_context_set_background (context, priv->bin_window); |
| gtk_style_context_set_background (context, gtk_widget_get_window (widget)); |
| } |
| } |
| |
| |
| static void |
| gtk_viewport_get_preferred_size (GtkWidget *widget, |
| GtkOrientation orientation, |
| gint *minimum_size, |
| gint *natural_size) |
| { |
| GtkViewport *viewport = GTK_VIEWPORT (widget); |
| GtkViewportPrivate *priv = viewport->priv; |
| GtkStyleContext *context; |
| GtkStateFlags state; |
| GtkBorder padding, border; |
| GtkWidget *child; |
| gint child_min, child_nat; |
| gint minimum, natural; |
| |
| child = gtk_bin_get_child (GTK_BIN (widget)); |
| |
| /* XXX This should probably be (border_width * 2); but GTK+ has |
| * been doing this with a single border for a while now... |
| */ |
| minimum = gtk_container_get_border_width (GTK_CONTAINER (widget)); |
| |
| context = gtk_widget_get_style_context (GTK_WIDGET (widget)); |
| state = gtk_widget_get_state_flags (GTK_WIDGET (widget)); |
| gtk_style_context_get_padding (context, state, &padding); |
| |
| if (priv->shadow_type != GTK_SHADOW_NONE) |
| { |
| gtk_style_context_get_border (context, state, &border); |
| |
| if (orientation == GTK_ORIENTATION_HORIZONTAL) |
| minimum += border.left + border.right; |
| else |
| minimum += border.top + border.bottom; |
| } |
| |
| if (orientation == GTK_ORIENTATION_HORIZONTAL) |
| minimum += padding.left + padding.right; |
| else |
| minimum += padding.top + padding.bottom; |
| |
| natural = minimum; |
| |
| if (child && gtk_widget_get_visible (child)) |
| { |
| if (orientation == GTK_ORIENTATION_HORIZONTAL) |
| gtk_widget_get_preferred_width (child, &child_min, &child_nat); |
| else |
| gtk_widget_get_preferred_height (child, &child_min, &child_nat); |
| |
| minimum += child_min; |
| natural += child_nat; |
| } |
| |
| if (minimum_size) |
| *minimum_size = minimum; |
| |
| if (natural_size) |
| *natural_size = natural; |
| } |
| |
| static void |
| gtk_viewport_get_preferred_width (GtkWidget *widget, |
| gint *minimum_size, |
| gint *natural_size) |
| { |
| gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size); |
| } |
| |
| static void |
| gtk_viewport_get_preferred_height (GtkWidget *widget, |
| gint *minimum_size, |
| gint *natural_size) |
| { |
| gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size); |
| } |
