/* 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 #include #include "gtkbindings.h" #include "gtkmarshalers.h" #include "gtkscrolledwindow.h" #include "gtkwindow.h" #include "gtkprivate.h" #include "gtkintl.h" #include "gtkalias.h" /* scrolled window policy and size requisition handling: * * gtk size requisition works as follows: * a widget upon size-request reports the width and height that it finds * to be best suited to display its contents, including children. * the width and/or height reported from a widget upon size requisition * may be overidden by the user by specifying a width and/or height * other than 0 through gtk_widget_set_size_request(). * * a scrolled window needs (for implementing all three policy types) to * request its width and height based on two different rationales. * 1) the user wants the scrolled window to just fit into the space * that it gets allocated for a specifc dimension. * 1.1) this does not apply if the user specified a concrete value * value for that specific dimension by either specifying usize for the * scrolled window or for its child. * 2) the user wants the scrolled window to take as much space up as * is desired by the child for a specifc dimension (i.e. POLICY_NEVER). * * also, kinda obvious: * 3) a user would certainly not have choosen a scrolled window as a container * for the child, if the resulting allocation takes up more space than the * child would have allocated without the scrolled window. * * conclusions: * A) from 1) follows: the scrolled window shouldn't request more space for a * specifc dimension than is required at minimum. * B) from 1.1) follows: the requisition may be overidden by usize of the scrolled * window (done automatically) or by usize of the child (needs to be checked). * C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the * child's dimension. * D) from 3) follows: the scrolled window child's minimum width and minimum height * under A) at least correspond to the space taken up by its scrollbars. */ #define DEFAULT_SCROLLBAR_SPACING 3 typedef struct { gboolean window_placement_set; GtkCornerType real_window_placement; } GtkScrolledWindowPrivate; #define GTK_SCROLLED_WINDOW_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_SCROLLED_WINDOW, GtkScrolledWindowPrivate)) enum { PROP_0, PROP_HADJUSTMENT, PROP_VADJUSTMENT, PROP_HSCROLLBAR_POLICY, PROP_VSCROLLBAR_POLICY, PROP_WINDOW_PLACEMENT, PROP_WINDOW_PLACEMENT_SET, PROP_SHADOW_TYPE }; /* Signals */ enum { SCROLL_CHILD, MOVE_FOCUS_OUT, LAST_SIGNAL }; static void gtk_scrolled_window_destroy (GtkObject *object); static void gtk_scrolled_window_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_scrolled_window_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_scrolled_window_screen_changed (GtkWidget *widget, GdkScreen *previous_screen); static gboolean gtk_scrolled_window_expose (GtkWidget *widget, GdkEventExpose *event); static void gtk_scrolled_window_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_scrolled_window_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget, GdkEventScroll *event); static gboolean gtk_scrolled_window_focus (GtkWidget *widget, GtkDirectionType direction); static void gtk_scrolled_window_add (GtkContainer *container, GtkWidget *widget); static void gtk_scrolled_window_remove (GtkContainer *container, GtkWidget *widget); static void gtk_scrolled_window_forall (GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer callback_data); static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window, GtkScrollType scroll, gboolean horizontal); static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window, GtkDirectionType direction_type); static void gtk_scrolled_window_relative_allocation(GtkWidget *widget, GtkAllocation *allocation); static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment, gpointer data); static void gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window); static guint signals[LAST_SIGNAL] = {0}; G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN) static void add_scroll_binding (GtkBindingSet *binding_set, guint keyval, GdkModifierType mask, GtkScrollType scroll, gboolean horizontal) { guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left; gtk_binding_entry_add_signal (binding_set, keyval, mask, "scroll-child", 2, GTK_TYPE_SCROLL_TYPE, scroll, G_TYPE_BOOLEAN, horizontal); gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask, "scroll-child", 2, GTK_TYPE_SCROLL_TYPE, scroll, G_TYPE_BOOLEAN, horizontal); } static void add_tab_bindings (GtkBindingSet *binding_set, GdkModifierType modifiers, GtkDirectionType direction) { gtk_binding_entry_add_signal (binding_set, GDK_Tab, modifiers, "move-focus-out", 1, GTK_TYPE_DIRECTION_TYPE, direction); gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, modifiers, "move-focus-out", 1, GTK_TYPE_DIRECTION_TYPE, direction); } static void gtk_scrolled_window_class_init (GtkScrolledWindowClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GtkObjectClass *object_class; GtkWidgetClass *widget_class; GtkContainerClass *container_class; GtkBindingSet *binding_set; object_class = (GtkObjectClass*) class; widget_class = (GtkWidgetClass*) class; container_class = (GtkContainerClass*) class; gobject_class->set_property = gtk_scrolled_window_set_property; gobject_class->get_property = gtk_scrolled_window_get_property; object_class->destroy = gtk_scrolled_window_destroy; widget_class->screen_changed = gtk_scrolled_window_screen_changed; widget_class->expose_event = gtk_scrolled_window_expose; widget_class->size_request = gtk_scrolled_window_size_request; widget_class->size_allocate = gtk_scrolled_window_size_allocate; widget_class->scroll_event = gtk_scrolled_window_scroll_event; widget_class->focus = gtk_scrolled_window_focus; container_class->add = gtk_scrolled_window_add; container_class->remove = gtk_scrolled_window_remove; container_class->forall = gtk_scrolled_window_forall; class->scrollbar_spacing = -1; class->scroll_child = gtk_scrolled_window_scroll_child; class->move_focus_out = gtk_scrolled_window_move_focus_out; g_object_class_install_property (gobject_class, PROP_HADJUSTMENT, g_param_spec_object ("hadjustment", P_("Horizontal Adjustment"), P_("The GtkAdjustment for the horizontal position"), 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 for the vertical position"), GTK_TYPE_ADJUSTMENT, GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (gobject_class, PROP_HSCROLLBAR_POLICY, g_param_spec_enum ("hscrollbar-policy", P_("Horizontal Scrollbar Policy"), P_("When the horizontal scrollbar is displayed"), GTK_TYPE_POLICY_TYPE, GTK_POLICY_ALWAYS, GTK_PARAM_READABLE | GTK_PARAM_WRITABLE)); g_object_class_install_property (gobject_class, PROP_VSCROLLBAR_POLICY, g_param_spec_enum ("vscrollbar-policy", P_("Vertical Scrollbar Policy"), P_("When the vertical scrollbar is displayed"), GTK_TYPE_POLICY_TYPE, GTK_POLICY_ALWAYS, GTK_PARAM_READABLE | GTK_PARAM_WRITABLE)); g_object_class_install_property (gobject_class, PROP_WINDOW_PLACEMENT, g_param_spec_enum ("window-placement", P_("Window Placement"), P_("Where the contents are located with respect to the scrollbars. This property only takes effect if \"window-placement-set\" is TRUE."), GTK_TYPE_CORNER_TYPE, GTK_CORNER_TOP_LEFT, GTK_PARAM_READABLE | GTK_PARAM_WRITABLE)); /** * GtkScrolledWindow:window-placement-set: * * Whether "window-placement" should be used to determine the location * of the contents with respect to the scrollbars. Otherwise, the * "gtk-scrolled-window-placement" setting is used. * * Since: 2.10 */ g_object_class_install_property (gobject_class, PROP_WINDOW_PLACEMENT_SET, g_param_spec_boolean ("window-placement-set", P_("Window Placement Set"), P_("Whether \"window-placement\" should be used to determine the location of the contents with respect to the scrollbars."), FALSE, GTK_PARAM_READABLE | GTK_PARAM_WRITABLE)); g_object_class_install_property (gobject_class, PROP_SHADOW_TYPE, g_param_spec_enum ("shadow-type", P_("Shadow Type"), P_("Style of bevel around the contents"), GTK_TYPE_SHADOW_TYPE, GTK_SHADOW_NONE, GTK_PARAM_READABLE | GTK_PARAM_WRITABLE)); /** * GtkScrolledWindow:scrollbars-within-bevel: * * Whether to place scrollbars within the scrolled window's bevel. * * Since: 2.12 */ gtk_widget_class_install_style_property (widget_class, g_param_spec_boolean ("scrollbars-within-bevel", P_("Scrollbars within bevel"), P_("Place scrollbars within the scrolled window's bevel"), FALSE, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("scrollbar-spacing", P_("Scrollbar spacing"), P_("Number of pixels between the scrollbars and the scrolled window"), 0, G_MAXINT, DEFAULT_SCROLLBAR_SPACING, GTK_PARAM_READABLE)); /** * GtkScrolledWindow::scroll-child: * @scrolled_window: a #GtkScrolledWindow * @scroll: a #GtkScrollType describing how much to scroll * @horizontal: whether the keybinding scrolls the child * horizontally or not * * The ::scroll-child signal is a * keybinding signal * which gets emitted when a keybinding that scrolls is pressed. * The horizontal or vertical adjustment is updated which triggers a * signal that the scrolled windows child may listen to and scroll itself. */ signals[SCROLL_CHILD] = g_signal_new (I_("scroll-child"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child), NULL, NULL, _gtk_marshal_BOOLEAN__ENUM_BOOLEAN, G_TYPE_BOOLEAN, 2, GTK_TYPE_SCROLL_TYPE, G_TYPE_BOOLEAN); signals[MOVE_FOCUS_OUT] = g_signal_new (I_("move-focus-out"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out), NULL, NULL, _gtk_marshal_VOID__ENUM, G_TYPE_NONE, 1, GTK_TYPE_DIRECTION_TYPE); binding_set = gtk_binding_set_by_class (class); add_scroll_binding (binding_set, GDK_Left, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, TRUE); add_scroll_binding (binding_set, GDK_Right, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, TRUE); add_scroll_binding (binding_set, GDK_Up, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, FALSE); add_scroll_binding (binding_set, GDK_Down, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, FALSE); add_scroll_binding (binding_set, GDK_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_BACKWARD, TRUE); add_scroll_binding (binding_set, GDK_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_FORWARD, TRUE); add_scroll_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_BACKWARD, FALSE); add_scroll_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_FORWARD, FALSE); add_scroll_binding (binding_set, GDK_Home, GDK_CONTROL_MASK, GTK_SCROLL_START, TRUE); add_scroll_binding (binding_set, GDK_End, GDK_CONTROL_MASK, GTK_SCROLL_END, TRUE); add_scroll_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START, FALSE); add_scroll_binding (binding_set, GDK_End, 0, GTK_SCROLL_END, FALSE); add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD); add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD); g_type_class_add_private (class, sizeof (GtkScrolledWindowPrivate)); } static void gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window) { gtk_widget_set_has_window (GTK_WIDGET (scrolled_window), FALSE); gtk_widget_set_can_focus (GTK_WIDGET (scrolled_window), TRUE); scrolled_window->hscrollbar = NULL; scrolled_window->vscrollbar = NULL; scrolled_window->hscrollbar_policy = GTK_POLICY_ALWAYS; scrolled_window->vscrollbar_policy = GTK_POLICY_ALWAYS; scrolled_window->hscrollbar_visible = FALSE; scrolled_window->vscrollbar_visible = FALSE; scrolled_window->focus_out = FALSE; scrolled_window->window_placement = GTK_CORNER_TOP_LEFT; gtk_scrolled_window_update_real_placement (scrolled_window); } /** * gtk_scrolled_window_new: * @hadjustment: (allow-none): horizontal adjustment * @vadjustment: (allow-none): vertical adjustment * * Creates a new scrolled window. * * The two arguments are the scrolled window's adjustments; these will be * shared with the scrollbars and the child widget to keep the bars in sync * with the child. Usually you want to pass %NULL for the adjustments, which * will cause the scrolled window to create them for you. * * Returns: a new scrolled window */ GtkWidget* gtk_scrolled_window_new (GtkAdjustment *hadjustment, GtkAdjustment *vadjustment) { GtkWidget *scrolled_window; if (hadjustment) g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL); if (vadjustment) g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL); scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW, "hadjustment", hadjustment, "vadjustment", vadjustment, NULL); return scrolled_window; } /** * gtk_scrolled_window_set_hadjustment: * @scrolled_window: a #GtkScrolledWindow * @hadjustment: horizontal scroll adjustment * * Sets the #GtkAdjustment for the horizontal scrollbar. */ void gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window, GtkAdjustment *hadjustment) { GtkBin *bin; g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); if (hadjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment)); else hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL); bin = GTK_BIN (scrolled_window); if (!scrolled_window->hscrollbar) { gtk_widget_push_composite_child (); scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment); gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar"); gtk_widget_pop_composite_child (); gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window)); g_object_ref (scrolled_window->hscrollbar); gtk_widget_show (scrolled_window->hscrollbar); } else { GtkAdjustment *old_adjustment; old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)); if (old_adjustment == hadjustment) return; g_signal_handlers_disconnect_by_func (old_adjustment, gtk_scrolled_window_adjustment_changed, scrolled_window); gtk_range_set_adjustment (GTK_RANGE (scrolled_window->hscrollbar), hadjustment); } hadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)); g_signal_connect (hadjustment, "changed", G_CALLBACK (gtk_scrolled_window_adjustment_changed), scrolled_window); gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window); if (bin->child) gtk_widget_set_scroll_adjustments (bin->child, gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)), gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar))); g_object_notify (G_OBJECT (scrolled_window), "hadjustment"); } /** * gtk_scrolled_window_set_vadjustment: * @scrolled_window: a #GtkScrolledWindow * @vadjustment: vertical scroll adjustment * * Sets the #GtkAdjustment for the vertical scrollbar. */ void gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window, GtkAdjustment *vadjustment) { GtkBin *bin; g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); if (vadjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment)); else vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL); bin = GTK_BIN (scrolled_window); if (!scrolled_window->vscrollbar) { gtk_widget_push_composite_child (); scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment); gtk_widget_set_composite_name (scrolled_window->vscrollbar, "vscrollbar"); gtk_widget_pop_composite_child (); gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window)); g_object_ref (scrolled_window->vscrollbar); gtk_widget_show (scrolled_window->vscrollbar); } else { GtkAdjustment *old_adjustment; old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)); if (old_adjustment == vadjustment) return; g_signal_handlers_disconnect_by_func (old_adjustment, gtk_scrolled_window_adjustment_changed, scrolled_window); gtk_range_set_adjustment (GTK_RANGE (scrolled_window->vscrollbar), vadjustment); } vadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)); g_signal_connect (vadjustment, "changed", G_CALLBACK (gtk_scrolled_window_adjustment_changed), scrolled_window); gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window); if (bin->child) gtk_widget_set_scroll_adjustments (bin->child, gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)), gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar))); g_object_notify (G_OBJECT (scrolled_window), "vadjustment"); } /** * gtk_scrolled_window_get_hadjustment: * @scrolled_window: a #GtkScrolledWindow * * Returns the horizontal scrollbar's adjustment, used to connect the * horizontal scrollbar to the child widget's horizontal scroll * functionality. * * Returns: (transfer none): the horizontal #GtkAdjustment */ GtkAdjustment* gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL); return (scrolled_window->hscrollbar ? gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)) : NULL); } /** * gtk_scrolled_window_get_vadjustment: * @scrolled_window: a #GtkScrolledWindow * * Returns the vertical scrollbar's adjustment, used to connect the * vertical scrollbar to the child widget's vertical scroll functionality. * * Returns: (transfer none): the vertical #GtkAdjustment */ GtkAdjustment* gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL); return (scrolled_window->vscrollbar ? gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)) : NULL); } /** * gtk_scrolled_window_get_hscrollbar: * @scrolled_window: a #GtkScrolledWindow * * Returns the horizontal scrollbar of @scrolled_window. * * Returns: (transfer none): the horizontal scrollbar of the scrolled window, * or %NULL if it does not have one. * * Since: 2.8 */ GtkWidget* gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL); return scrolled_window->hscrollbar; } /** * gtk_scrolled_window_get_vscrollbar: * @scrolled_window: a #GtkScrolledWindow * * Returns the vertical scrollbar of @scrolled_window. * * Returns: (transfer none): the vertical scrollbar of the scrolled window, * or %NULL if it does not have one. * * Since: 2.8 */ GtkWidget* gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL); return scrolled_window->vscrollbar; } /** * gtk_scrolled_window_set_policy: * @scrolled_window: a #GtkScrolledWindow * @hscrollbar_policy: policy for horizontal bar * @vscrollbar_policy: policy for vertical bar * * Sets the scrollbar policy for the horizontal and vertical scrollbars. * * The policy determines when the scrollbar should appear; it is a value * from the #GtkPolicyType enumeration. If %GTK_POLICY_ALWAYS, the * scrollbar is always present; if %GTK_POLICY_NEVER, the scrollbar is * never present; if %GTK_POLICY_AUTOMATIC, the scrollbar is present only * if needed (that is, if the slider part of the bar would be smaller * than the trough - the display is larger than the page size). */ void gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window, GtkPolicyType hscrollbar_policy, GtkPolicyType vscrollbar_policy) { GObject *object = G_OBJECT (scrolled_window); g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); if ((scrolled_window->hscrollbar_policy != hscrollbar_policy) || (scrolled_window->vscrollbar_policy != vscrollbar_policy)) { scrolled_window->hscrollbar_policy = hscrollbar_policy; scrolled_window->vscrollbar_policy = vscrollbar_policy; gtk_widget_queue_resize (GTK_WIDGET (scrolled_window)); g_object_freeze_notify (object); g_object_notify (object, "hscrollbar-policy"); g_object_notify (object, "vscrollbar-policy"); g_object_thaw_notify (object); } } /** * gtk_scrolled_window_get_policy: * @scrolled_window: a #GtkScrolledWindow * @hscrollbar_policy: (out) (allow-none): location to store the policy * for the horizontal scrollbar, or %NULL. * @vscrollbar_policy: (out) (allow-none): location to store the policy * for the vertical scrollbar, or %NULL. * * Retrieves the current policy values for the horizontal and vertical * scrollbars. See gtk_scrolled_window_set_policy(). */ void gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window, GtkPolicyType *hscrollbar_policy, GtkPolicyType *vscrollbar_policy) { g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); if (hscrollbar_policy) *hscrollbar_policy = scrolled_window->hscrollbar_policy; if (vscrollbar_policy) *vscrollbar_policy = scrolled_window->vscrollbar_policy; } static void gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window) { GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); GtkSettings *settings; settings = gtk_widget_get_settings (GTK_WIDGET (scrolled_window)); if (priv->window_placement_set || settings == NULL) priv->real_window_placement = scrolled_window->window_placement; else g_object_get (settings, "gtk-scrolled-window-placement", &priv->real_window_placement, NULL); } static void gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window, GtkCornerType window_placement) { if (scrolled_window->window_placement != window_placement) { scrolled_window->window_placement = window_placement; gtk_scrolled_window_update_real_placement (scrolled_window); gtk_widget_queue_resize (GTK_WIDGET (scrolled_window)); g_object_notify (G_OBJECT (scrolled_window), "window-placement"); } } static void gtk_scrolled_window_set_placement_set (GtkScrolledWindow *scrolled_window, gboolean placement_set, gboolean emit_resize) { GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); if (priv->window_placement_set != placement_set) { priv->window_placement_set = placement_set; gtk_scrolled_window_update_real_placement (scrolled_window); if (emit_resize) gtk_widget_queue_resize (GTK_WIDGET (scrolled_window)); g_object_notify (G_OBJECT (scrolled_window), "window-placement-set"); } } /** * gtk_scrolled_window_set_placement: * @scrolled_window: a #GtkScrolledWindow * @window_placement: position of the child window * * Sets the placement of the contents with respect to the scrollbars * for the scrolled window. * * The default is %GTK_CORNER_TOP_LEFT, meaning the child is * in the top left, with the scrollbars underneath and to the right. * Other values in #GtkCornerType are %GTK_CORNER_TOP_RIGHT, * %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT. * * See also gtk_scrolled_window_get_placement() and * gtk_scrolled_window_unset_placement(). */ void gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window, GtkCornerType window_placement) { g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); gtk_scrolled_window_set_placement_set (scrolled_window, TRUE, FALSE); gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement); } /** * gtk_scrolled_window_get_placement: * @scrolled_window: a #GtkScrolledWindow * * Gets the placement of the contents with respect to the scrollbars * for the scrolled window. See gtk_scrolled_window_set_placement(). * * Return value: the current placement value. * * See also gtk_scrolled_window_set_placement() and * gtk_scrolled_window_unset_placement(). **/ GtkCornerType gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT); return scrolled_window->window_placement; } /** * gtk_scrolled_window_unset_placement: * @scrolled_window: a #GtkScrolledWindow * * Unsets the placement of the contents with respect to the scrollbars * for the scrolled window. If no window placement is set for a scrolled * window, it obeys the "gtk-scrolled-window-placement" XSETTING. * * See also gtk_scrolled_window_set_placement() and * gtk_scrolled_window_get_placement(). * * Since: 2.10 **/ void gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window) { GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); if (priv->window_placement_set) { priv->window_placement_set = FALSE; gtk_widget_queue_resize (GTK_WIDGET (scrolled_window)); g_object_notify (G_OBJECT (scrolled_window), "window-placement-set"); } } /** * gtk_scrolled_window_set_shadow_type: * @scrolled_window: a #GtkScrolledWindow * @type: kind of shadow to draw around scrolled window contents * * Changes the type of shadow drawn around the contents of * @scrolled_window. * **/ void gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window, GtkShadowType type) { g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT); if (scrolled_window->shadow_type != type) { scrolled_window->shadow_type = type; if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window))) gtk_widget_queue_draw (GTK_WIDGET (scrolled_window)); gtk_widget_queue_resize (GTK_WIDGET (scrolled_window)); g_object_notify (G_OBJECT (scrolled_window), "shadow-type"); } } /** * gtk_scrolled_window_get_shadow_type: * @scrolled_window: a #GtkScrolledWindow * * Gets the shadow type of the scrolled window. See * gtk_scrolled_window_set_shadow_type(). * * Return value: the current shadow type **/ GtkShadowType gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window) { g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_SHADOW_NONE); return scrolled_window->shadow_type; } static void gtk_scrolled_window_destroy (GtkObject *object) { GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object); if (scrolled_window->hscrollbar) { g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)), gtk_scrolled_window_adjustment_changed, scrolled_window); gtk_widget_unparent (scrolled_window->hscrollbar); gtk_widget_destroy (scrolled_window->hscrollbar); g_object_unref (scrolled_window->hscrollbar); scrolled_window->hscrollbar = NULL; } if (scrolled_window->vscrollbar) { g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)), gtk_scrolled_window_adjustment_changed, scrolled_window); gtk_widget_unparent (scrolled_window->vscrollbar); gtk_widget_destroy (scrolled_window->vscrollbar); g_object_unref (scrolled_window->vscrollbar); scrolled_window->vscrollbar = NULL; } GTK_OBJECT_CLASS (gtk_scrolled_window_parent_class)->destroy (object); } static void gtk_scrolled_window_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object); switch (prop_id) { case PROP_HADJUSTMENT: gtk_scrolled_window_set_hadjustment (scrolled_window, g_value_get_object (value)); break; case PROP_VADJUSTMENT: gtk_scrolled_window_set_vadjustment (scrolled_window, g_value_get_object (value)); break; case PROP_HSCROLLBAR_POLICY: gtk_scrolled_window_set_policy (scrolled_window, g_value_get_enum (value), scrolled_window->vscrollbar_policy); break; case PROP_VSCROLLBAR_POLICY: gtk_scrolled_window_set_policy (scrolled_window, scrolled_window->hscrollbar_policy, g_value_get_enum (value)); break; case PROP_WINDOW_PLACEMENT: gtk_scrolled_window_set_placement_internal (scrolled_window, g_value_get_enum (value)); break; case PROP_WINDOW_PLACEMENT_SET: gtk_scrolled_window_set_placement_set (scrolled_window, g_value_get_boolean (value), TRUE); break; case PROP_SHADOW_TYPE: gtk_scrolled_window_set_shadow_type (scrolled_window, g_value_get_enum (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_scrolled_window_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object); GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); switch (prop_id) { case PROP_HADJUSTMENT: g_value_set_object (value, G_OBJECT (gtk_scrolled_window_get_hadjustment (scrolled_window))); break; case PROP_VADJUSTMENT: g_value_set_object (value, G_OBJECT (gtk_scrolled_window_get_vadjustment (scrolled_window))); break; case PROP_HSCROLLBAR_POLICY: g_value_set_enum (value, scrolled_window->hscrollbar_policy); break; case PROP_VSCROLLBAR_POLICY: g_value_set_enum (value, scrolled_window->vscrollbar_policy); break; case PROP_WINDOW_PLACEMENT: g_value_set_enum (value, scrolled_window->window_placement); break; case PROP_WINDOW_PLACEMENT_SET: g_value_set_boolean (value, priv->window_placement_set); break; case PROP_SHADOW_TYPE: g_value_set_enum (value, scrolled_window->shadow_type); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void traverse_container (GtkWidget *widget, gpointer data) { if (GTK_IS_SCROLLED_WINDOW (widget)) { gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget)); gtk_widget_queue_resize (widget); } else if (GTK_IS_CONTAINER (widget)) gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL); } static void gtk_scrolled_window_settings_changed (GtkSettings *settings) { GList *list, *l; list = gtk_window_list_toplevels (); for (l = list; l; l = l->next) gtk_container_forall (GTK_CONTAINER (l->data), traverse_container, NULL); g_list_free (list); } static void gtk_scrolled_window_screen_changed (GtkWidget *widget, GdkScreen *previous_screen) { GtkSettings *settings; guint window_placement_connection; gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget)); if (!gtk_widget_has_screen (widget)) return; settings = gtk_widget_get_settings (widget); window_placement_connection = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings), "gtk-scrolled-window-connection")); if (window_placement_connection) return; window_placement_connection = g_signal_connect (settings, "notify::gtk-scrolled-window-placement", G_CALLBACK (gtk_scrolled_window_settings_changed), NULL); g_object_set_data (G_OBJECT (settings), I_("gtk-scrolled-window-connection"), GUINT_TO_POINTER (window_placement_connection)); } static void gtk_scrolled_window_paint (GtkWidget *widget, GdkRectangle *area) { GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget); if (scrolled_window->shadow_type != GTK_SHADOW_NONE) { GtkAllocation relative_allocation; gboolean scrollbars_within_bevel; gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL); if (!scrollbars_within_bevel) { gtk_scrolled_window_relative_allocation (widget, &relative_allocation); relative_allocation.x -= widget->style->xthickness; relative_allocation.y -= widget->style->ythickness; relative_allocation.width += 2 * widget->style->xthickness; relative_allocation.height += 2 * widget->style->ythickness; } else { GtkContainer *container = GTK_CONTAINER (widget); relative_allocation.x = container->border_width; relative_allocation.y = container->border_width; relative_allocation.width = widget->allocation.width - 2 * container->border_width; relative_allocation.height = widget->allocation.height - 2 * container->border_width; } gtk_paint_shadow (widget->style, widget->window, GTK_STATE_NORMAL, scrolled_window->shadow_type, area, widget, "scrolled_window", widget->allocation.x + relative_allocation.x, widget->allocation.y + relative_allocation.y, relative_allocation.width, relative_allocation.height); } } static gboolean gtk_scrolled_window_expose (GtkWidget *widget, GdkEventExpose *event) { if (gtk_widget_is_drawable (widget)) { gtk_scrolled_window_paint (widget, &event->area); GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->expose_event (widget, event); } return FALSE; } static void gtk_scrolled_window_forall (GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer callback_data) { g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container)); g_return_if_fail (callback != NULL); GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->forall (container, include_internals, callback, callback_data); if (include_internals) { GtkScrolledWindow *scrolled_window; scrolled_window = GTK_SCROLLED_WINDOW (container); if (scrolled_window->vscrollbar) callback (scrolled_window->vscrollbar, callback_data); if (scrolled_window->hscrollbar) callback (scrolled_window->hscrollbar, callback_data); } } static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window, GtkScrollType scroll, gboolean horizontal) { GtkAdjustment *adjustment = NULL; switch (scroll) { case GTK_SCROLL_STEP_UP: scroll = GTK_SCROLL_STEP_BACKWARD; horizontal = FALSE; break; case GTK_SCROLL_STEP_DOWN: scroll = GTK_SCROLL_STEP_FORWARD; horizontal = FALSE; break; case GTK_SCROLL_STEP_LEFT: scroll = GTK_SCROLL_STEP_BACKWARD; horizontal = TRUE; break; case GTK_SCROLL_STEP_RIGHT: scroll = GTK_SCROLL_STEP_FORWARD; horizontal = TRUE; break; case GTK_SCROLL_PAGE_UP: scroll = GTK_SCROLL_PAGE_BACKWARD; horizontal = FALSE; break; case GTK_SCROLL_PAGE_DOWN: scroll = GTK_SCROLL_PAGE_FORWARD; horizontal = FALSE; break; case GTK_SCROLL_PAGE_LEFT: scroll = GTK_SCROLL_STEP_BACKWARD; horizontal = TRUE; break; case GTK_SCROLL_PAGE_RIGHT: scroll = GTK_SCROLL_STEP_FORWARD; horizontal = TRUE; break; case GTK_SCROLL_STEP_BACKWARD: case GTK_SCROLL_STEP_FORWARD: case GTK_SCROLL_PAGE_BACKWARD: case GTK_SCROLL_PAGE_FORWARD: case GTK_SCROLL_START: case GTK_SCROLL_END: break; default: g_warning ("Invalid scroll type %u for GtkScrolledWindow::scroll-child", scroll); return FALSE; } if ((horizontal && (!scrolled_window->hscrollbar || !scrolled_window->hscrollbar_visible)) || (!horizontal && (!scrolled_window->vscrollbar || !scrolled_window->vscrollbar_visible))) return FALSE; if (horizontal) { if (scrolled_window->hscrollbar) adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)); } else { if (scrolled_window->vscrollbar) adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)); } if (adjustment) { gdouble value = adjustment->value; switch (scroll) { case GTK_SCROLL_STEP_FORWARD: value += adjustment->step_increment; break; case GTK_SCROLL_STEP_BACKWARD: value -= adjustment->step_increment; break; case GTK_SCROLL_PAGE_FORWARD: value += adjustment->page_increment; break; case GTK_SCROLL_PAGE_BACKWARD: value -= adjustment->page_increment; break; case GTK_SCROLL_START: value = adjustment->lower; break; case GTK_SCROLL_END: value = adjustment->upper; break; default: g_assert_not_reached (); break; } value = CLAMP (value, adjustment->lower, adjustment->upper - adjustment->page_size); gtk_adjustment_set_value (adjustment, value); return TRUE; } return FALSE; } static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window, GtkDirectionType direction_type) { GtkWidget *toplevel; /* Focus out of the scrolled window entirely. We do this by setting * a flag, then propagating the focus motion to the notebook. */ toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scrolled_window)); if (!gtk_widget_is_toplevel (toplevel)) return; g_object_ref (scrolled_window); scrolled_window->focus_out = TRUE; g_signal_emit_by_name (toplevel, "move-focus", direction_type); scrolled_window->focus_out = FALSE; g_object_unref (scrolled_window); } static void gtk_scrolled_window_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkScrolledWindow *scrolled_window; GtkBin *bin; gint extra_width; gint extra_height; gint scrollbar_spacing; GtkRequisition hscrollbar_requisition; GtkRequisition vscrollbar_requisition; GtkRequisition child_requisition; g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget)); g_return_if_fail (requisition != NULL); scrolled_window = GTK_SCROLLED_WINDOW (widget); bin = GTK_BIN (scrolled_window); scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window); extra_width = 0; extra_height = 0; requisition->width = 0; requisition->height = 0; gtk_widget_size_request (scrolled_window->hscrollbar, &hscrollbar_requisition); gtk_widget_size_request (scrolled_window->vscrollbar, &vscrollbar_requisition); if (bin->child && gtk_widget_get_visible (bin->child)) { gtk_widget_size_request (bin->child, &child_requisition); if (scrolled_window->hscrollbar_policy == GTK_POLICY_NEVER) requisition->width += child_requisition.width; else { GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (bin->child, FALSE); if (aux_info && aux_info->width > 0) { requisition->width += aux_info->width; extra_width = -1; } else requisition->width += vscrollbar_requisition.width; } if (scrolled_window->vscrollbar_policy == GTK_POLICY_NEVER) requisition->height += child_requisition.height; else { GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (bin->child, FALSE); if (aux_info && aux_info->height > 0) { requisition->height += aux_info->height; extra_height = -1; } else requisition->height += hscrollbar_requisition.height; } } if (scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC || scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS) { requisition->width = MAX (requisition->width, hscrollbar_requisition.width); if (!extra_height || scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS) extra_height = scrollbar_spacing + hscrollbar_requisition.height; } if (scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC || scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS) { requisition->height = MAX (requisition->height, vscrollbar_requisition.height); if (!extra_height || scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS) extra_width = scrollbar_spacing + vscrollbar_requisition.width; } requisition->width += GTK_CONTAINER (widget)->border_width * 2 + MAX (0, extra_width); requisition->height += GTK_CONTAINER (widget)->border_width * 2 + MAX (0, extra_height); if (scrolled_window->shadow_type != GTK_SHADOW_NONE) { requisition->width += 2 * widget->style->xthickness; requisition->height += 2 * widget->style->ythickness; } } static void gtk_scrolled_window_relative_allocation (GtkWidget *widget, GtkAllocation *allocation) { GtkScrolledWindow *scrolled_window; GtkScrolledWindowPrivate *priv; gint scrollbar_spacing; g_return_if_fail (widget != NULL); g_return_if_fail (allocation != NULL); scrolled_window = GTK_SCROLLED_WINDOW (widget); scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window); priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); allocation->x = GTK_CONTAINER (widget)->border_width; allocation->y = GTK_CONTAINER (widget)->border_width; if (scrolled_window->shadow_type != GTK_SHADOW_NONE) { allocation->x += widget->style->xthickness; allocation->y += widget->style->ythickness; } allocation->width = MAX (1, (gint)widget->allocation.width - allocation->x * 2); allocation->height = MAX (1, (gint)widget->allocation.height - allocation->y * 2); if (scrolled_window->vscrollbar_visible) { GtkRequisition vscrollbar_requisition; gboolean is_rtl; gtk_widget_get_child_requisition (scrolled_window->vscrollbar, &vscrollbar_requisition); is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL; if ((!is_rtl && (priv->real_window_placement == GTK_CORNER_TOP_RIGHT || priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) || (is_rtl && (priv->real_window_placement == GTK_CORNER_TOP_LEFT || priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT))) allocation->x += (vscrollbar_requisition.width + scrollbar_spacing); allocation->width = MAX (1, allocation->width - (vscrollbar_requisition.width + scrollbar_spacing)); } if (scrolled_window->hscrollbar_visible) { GtkRequisition hscrollbar_requisition; gtk_widget_get_child_requisition (scrolled_window->hscrollbar, &hscrollbar_requisition); if (priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT || priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT) allocation->y += (hscrollbar_requisition.height + scrollbar_spacing); allocation->height = MAX (1, allocation->height - (hscrollbar_requisition.height + scrollbar_spacing)); } } static void gtk_scrolled_window_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkScrolledWindow *scrolled_window; GtkScrolledWindowPrivate *priv; GtkBin *bin; GtkAllocation relative_allocation; GtkAllocation child_allocation; gboolean scrollbars_within_bevel; gint scrollbar_spacing; g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget)); g_return_if_fail (allocation != NULL); scrolled_window = GTK_SCROLLED_WINDOW (widget); bin = GTK_BIN (scrolled_window); scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window); gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL); priv = GTK_SCROLLED_WINDOW_GET_PRIVATE (scrolled_window); widget->allocation = *allocation; if (scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS) scrolled_window->hscrollbar_visible = TRUE; else if (scrolled_window->hscrollbar_policy == GTK_POLICY_NEVER) scrolled_window->hscrollbar_visible = FALSE; if (scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS) scrolled_window->vscrollbar_visible = TRUE; else if (scrolled_window->vscrollbar_policy == GTK_POLICY_NEVER) scrolled_window->vscrollbar_visible = FALSE; if (bin->child && gtk_widget_get_visible (bin->child)) { gboolean previous_hvis; gboolean previous_vvis; guint count = 0; do { gtk_scrolled_window_relative_allocation (widget, &relative_allocation); child_allocation.x = relative_allocation.x + allocation->x; child_allocation.y = relative_allocation.y + allocation->y; child_allocation.width = relative_allocation.width; child_allocation.height = relative_allocation.height; previous_hvis = scrolled_window->hscrollbar_visible; previous_vvis = scrolled_window->vscrollbar_visible; gtk_widget_size_allocate (bin->child, &child_allocation); /* If, after the first iteration, the hscrollbar and the * vscrollbar flip visiblity, then we need both. */ if (count && previous_hvis != scrolled_window->hscrollbar_visible && previous_vvis != scrolled_window->vscrollbar_visible) { scrolled_window->hscrollbar_visible = TRUE; scrolled_window->vscrollbar_visible = TRUE; /* a new resize is already queued at this point, * so we will immediatedly get reinvoked */ return; } count++; } while (previous_hvis != scrolled_window->hscrollbar_visible || previous_vvis != scrolled_window->vscrollbar_visible); } else { scrolled_window->hscrollbar_visible = scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS; scrolled_window->vscrollbar_visible = scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS; gtk_scrolled_window_relative_allocation (widget, &relative_allocation); } if (scrolled_window->hscrollbar_visible) { GtkRequisition hscrollbar_requisition; gtk_widget_get_child_requisition (scrolled_window->hscrollbar, &hscrollbar_requisition); if (!gtk_widget_get_visible (scrolled_window->hscrollbar)) gtk_widget_show (scrolled_window->hscrollbar); child_allocation.x = relative_allocation.x; if (priv->real_window_placement == GTK_CORNER_TOP_LEFT || priv->real_window_placement == GTK_CORNER_TOP_RIGHT) child_allocation.y = (relative_allocation.y + relative_allocation.height + scrollbar_spacing + (scrolled_window->shadow_type == GTK_SHADOW_NONE ? 0 : widget->style->ythickness)); else child_allocation.y = GTK_CONTAINER (scrolled_window)->border_width; child_allocation.width = relative_allocation.width; child_allocation.height = hscrollbar_requisition.height; child_allocation.x += allocation->x; child_allocation.y += allocation->y; if (scrolled_window->shadow_type != GTK_SHADOW_NONE) { if (!scrollbars_within_bevel) { child_allocation.x -= widget->style->xthickness; child_allocation.width += 2 * widget->style->xthickness; } else if (GTK_CORNER_TOP_RIGHT == priv->real_window_placement || GTK_CORNER_TOP_LEFT == priv->real_window_placement) { child_allocation.y -= widget->style->ythickness; } else { child_allocation.y += widget->style->ythickness; } } gtk_widget_size_allocate (scrolled_window->hscrollbar, &child_allocation); } else if (gtk_widget_get_visible (scrolled_window->hscrollbar)) gtk_widget_hide (scrolled_window->hscrollbar); if (scrolled_window->vscrollbar_visible) { GtkRequisition vscrollbar_requisition; if (!gtk_widget_get_visible (scrolled_window->vscrollbar)) gtk_widget_show (scrolled_window->vscrollbar); gtk_widget_get_child_requisition (scrolled_window->vscrollbar, &vscrollbar_requisition); if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL && (priv->real_window_placement == GTK_CORNER_TOP_RIGHT || priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) || (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR && (priv->real_window_placement == GTK_CORNER_TOP_LEFT || priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT))) child_allocation.x = (relative_allocation.x + relative_allocation.width + scrollbar_spacing + (scrolled_window->shadow_type == GTK_SHADOW_NONE ? 0 : widget->style->xthickness)); else child_allocation.x = GTK_CONTAINER (scrolled_window)->border_width; child_allocation.y = relative_allocation.y; child_allocation.width = vscrollbar_requisition.width; child_allocation.height = relative_allocation.height; child_allocation.x += allocation->x; child_allocation.y += allocation->y; if (scrolled_window->shadow_type != GTK_SHADOW_NONE) { if (!scrollbars_within_bevel) { child_allocation.y -= widget->style->ythickness; child_allocation.height += 2 * widget->style->ythickness; } else if (GTK_CORNER_BOTTOM_LEFT == priv->real_window_placement || GTK_CORNER_TOP_LEFT == priv->real_window_placement) { child_allocation.x -= widget->style->xthickness; } else { child_allocation.x += widget->style->xthickness; } } gtk_widget_size_allocate (scrolled_window->vscrollbar, &child_allocation); } else if (gtk_widget_get_visible (scrolled_window->vscrollbar)) gtk_widget_hide (scrolled_window->vscrollbar); } static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget, GdkEventScroll *event) { GtkWidget *range; g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN) range = GTK_SCROLLED_WINDOW (widget)->vscrollbar; else range = GTK_SCROLLED_WINDOW (widget)->hscrollbar; if (range && gtk_widget_get_visible (range)) { GtkAdjustment *adj = GTK_RANGE (range)->adjustment; gdouble delta, new_value; delta = _gtk_range_get_wheel_delta (GTK_RANGE (range), event->direction); new_value = CLAMP (adj->value + delta, adj->lower, adj->upper - adj->page_size); gtk_adjustment_set_value (adj, new_value); return TRUE; } return FALSE; } static gboolean gtk_scrolled_window_focus (GtkWidget *widget, GtkDirectionType direction) { GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget); gboolean had_focus_child = GTK_CONTAINER (widget)->focus_child != NULL; if (scrolled_window->focus_out) { scrolled_window->focus_out = FALSE; /* Clear this to catch the wrap-around case */ return FALSE; } if (gtk_widget_is_focus (widget)) return FALSE; /* We only put the scrolled window itself in the focus chain if it * isn't possible to focus any children. */ if (GTK_BIN (widget)->child) { if (gtk_widget_child_focus (GTK_BIN (widget)->child, direction)) return TRUE; } if (!had_focus_child && gtk_widget_get_can_focus (widget)) { gtk_widget_grab_focus (widget); return TRUE; } else return FALSE; } static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment, gpointer data) { GtkScrolledWindow *scrolled_win; g_return_if_fail (adjustment != NULL); g_return_if_fail (data != NULL); scrolled_win = GTK_SCROLLED_WINDOW (data); if (scrolled_win->hscrollbar && adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->hscrollbar))) { if (scrolled_win->hscrollbar_policy == GTK_POLICY_AUTOMATIC) { gboolean visible; visible = scrolled_win->hscrollbar_visible; scrolled_win->hscrollbar_visible = (adjustment->upper - adjustment->lower > adjustment->page_size); if (scrolled_win->hscrollbar_visible != visible) gtk_widget_queue_resize (GTK_WIDGET (scrolled_win)); } } else if (scrolled_win->vscrollbar && adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->vscrollbar))) { if (scrolled_win->vscrollbar_policy == GTK_POLICY_AUTOMATIC) { gboolean visible; visible = scrolled_win->vscrollbar_visible; scrolled_win->vscrollbar_visible = (adjustment->upper - adjustment->lower > adjustment->page_size); if (scrolled_win->vscrollbar_visible != visible) gtk_widget_queue_resize (GTK_WIDGET (scrolled_win)); } } } static void gtk_scrolled_window_add (GtkContainer *container, GtkWidget *child) { GtkScrolledWindow *scrolled_window; GtkBin *bin; bin = GTK_BIN (container); g_return_if_fail (bin->child == NULL); scrolled_window = GTK_SCROLLED_WINDOW (container); bin->child = child; gtk_widget_set_parent (child, GTK_WIDGET (bin)); /* this is a temporary message */ if (!gtk_widget_set_scroll_adjustments (child, gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)), gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)))) g_warning ("gtk_scrolled_window_add(): cannot add non scrollable widget " "use gtk_scrolled_window_add_with_viewport() instead"); } static void gtk_scrolled_window_remove (GtkContainer *container, GtkWidget *child) { g_return_if_fail (GTK_IS_SCROLLED_WINDOW (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 (gtk_scrolled_window_parent_class)->remove (container, child); } /** * gtk_scrolled_window_add_with_viewport: * @scrolled_window: a #GtkScrolledWindow * @child: the widget you want to scroll * * Used to add children without native scrolling capabilities. This * is simply a convenience function; it is equivalent to adding the * unscrollable child to a viewport, then adding the viewport to the * scrolled window. If a child has native scrolling, use * gtk_container_add() instead of this function. * * The viewport scrolls the child by moving its #GdkWindow, and takes * the size of the child to be the size of its toplevel #GdkWindow. * This will be very wrong for most widgets that support native scrolling; * for example, if you add a widget such as #GtkTreeView with a viewport, * the whole widget will scroll, including the column headings. Thus, * widgets with native scrolling support should not be used with the * #GtkViewport proxy. * * A widget supports scrolling natively if the * set_scroll_adjustments_signal field in #GtkWidgetClass is non-zero, * i.e. has been filled in with a valid signal identifier. */ void gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window, GtkWidget *child) { GtkBin *bin; GtkWidget *viewport; g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == NULL); bin = GTK_BIN (scrolled_window); if (bin->child != NULL) { g_return_if_fail (GTK_IS_VIEWPORT (bin->child)); g_return_if_fail (GTK_BIN (bin->child)->child == NULL); viewport = bin->child; } else { viewport = gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window), gtk_scrolled_window_get_vadjustment (scrolled_window)); gtk_container_add (GTK_CONTAINER (scrolled_window), viewport); } gtk_widget_show (viewport); gtk_container_add (GTK_CONTAINER (viewport), child); } /* * _gtk_scrolled_window_get_spacing: * @scrolled_window: a scrolled window * * Gets the spacing between the scrolled window's scrollbars and * the scrolled widget. Used by GtkCombo * * Return value: the spacing, in pixels. */ gint _gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window) { GtkScrolledWindowClass *class; g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0); class = GTK_SCROLLED_WINDOW_GET_CLASS (scrolled_window); if (class->scrollbar_spacing >= 0) return class->scrollbar_spacing; else { gint scrollbar_spacing; gtk_widget_style_get (GTK_WIDGET (scrolled_window), "scrollbar-spacing", &scrollbar_spacing, NULL); return scrollbar_spacing; } } #define __GTK_SCROLLED_WINDOW_C__ #include "gtkaliasdef.c"