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278 lines
7.3 KiB
C
278 lines
7.3 KiB
C
/*
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* Copyright © 2020 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#include "config.h"
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#include "gdk-private.h"
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#include "gdkintl.h"
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#include "gdkpopupprivate.h"
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/**
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* SECTION:gdkpopup
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* @Short_description: Interface for popup surfaces
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* @Title: Popups
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*
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* A #GdkPopup is a surface that is attached to another surface,
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* and is positioned relative to it.
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*/
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G_DEFINE_INTERFACE (GdkPopup, gdk_popup, GDK_TYPE_SURFACE)
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enum
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{
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POPUP_LAYOUT_CHANGED,
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N_SIGNALS
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};
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static guint signals[N_SIGNALS] = { 0 };
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static gboolean
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gdk_popup_default_present (GdkPopup *popup,
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int width,
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int height,
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GdkPopupLayout *layout)
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{
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return FALSE;
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}
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static GdkGravity
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gdk_popup_default_get_surface_anchor (GdkPopup *popup)
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{
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return GDK_GRAVITY_STATIC;
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}
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static GdkGravity
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gdk_popup_default_get_rect_anchor (GdkPopup *popup)
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{
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return GDK_GRAVITY_STATIC;
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}
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static int
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gdk_popup_default_get_position_x (GdkPopup *popup)
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{
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return 0;
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}
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static int
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gdk_popup_default_get_position_y (GdkPopup *popup)
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{
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return 0;
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}
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static void
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gdk_popup_default_init (GdkPopupInterface *iface)
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{
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iface->present = gdk_popup_default_present;
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iface->get_surface_anchor = gdk_popup_default_get_surface_anchor;
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iface->get_rect_anchor = gdk_popup_default_get_rect_anchor;
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iface->get_position_x = gdk_popup_default_get_position_x;
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iface->get_position_y = gdk_popup_default_get_position_y;
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g_object_interface_install_property (iface,
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g_param_spec_object ("parent",
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P_("Parent"),
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P_("The parent surface"),
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GDK_TYPE_SURFACE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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g_object_interface_install_property (iface,
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g_param_spec_boolean ("autohide",
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P_("Autohide"),
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P_("The parent surface"),
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FALSE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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/**
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* GdkPopup::popup-layout-changed
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* @popup: the #GdkSurface that was laid out
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*
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* Emitted when the layout of a popup surface has changed, e.g. if the popup
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* layout was reactive and after the parent moved causing the popover to end
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* up partially off-screen.
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*/
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signals[POPUP_LAYOUT_CHANGED] =
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g_signal_new (g_intern_static_string ("popup-layout-changed"),
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GDK_TYPE_POPUP,
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G_SIGNAL_RUN_FIRST,
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0,
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NULL,
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NULL,
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NULL,
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G_TYPE_NONE,
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0);
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}
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/**
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* gdk_popup_present:
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* @popup: the #GdkPopup to show
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* @width: the unconstrained popup width to layout
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* @height: the unconstrained popup height to layout
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* @layout: the #GdkPopupLayout object used to layout
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*
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* Present @popup after having processed the #GdkPopupLayout rules.
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* If the popup was previously now showing, it will be showed,
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* otherwise it will change position according to @layout.
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*
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* After calling this function, the result of the layout can be queried
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* using gdk_popup_get_position_x(), gdk_popup_get_position_y(),
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* gdk_surface_get_width(), gdk_surface_get_height(),
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* gdk_popup_get_rect_anchor() and gdk_popup_get_surface_anchor().
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*
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* Presenting may have fail, for example if it was immediately
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* hidden if the @popup was set to autohide.
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*
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* Returns: %FALSE if it failed to be presented, otherwise %TRUE.
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*/
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gboolean
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gdk_popup_present (GdkPopup *popup,
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int width,
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int height,
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GdkPopupLayout *layout)
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{
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g_return_val_if_fail (GDK_IS_POPUP (popup), FALSE);
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g_return_val_if_fail (width > 0, FALSE);
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g_return_val_if_fail (height > 0, FALSE);
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g_return_val_if_fail (layout != NULL, FALSE);
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return GDK_POPUP_GET_IFACE (popup)->present (popup, width, height, layout);
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}
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/**
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* gdk_popup_get_surface_anchor:
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* @popup: a #GdkPopup
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*
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* Gets the current popup surface anchor.
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*
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* The value returned may change after calling gdk_popup_present(),
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* or after the "popup-layout-changed" is emitted.
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*
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* Returns: the current surface anchor value of @popup
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*/
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GdkGravity
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gdk_popup_get_surface_anchor (GdkPopup *popup)
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{
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g_return_val_if_fail (GDK_IS_POPUP (popup), GDK_GRAVITY_STATIC);
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return GDK_POPUP_GET_IFACE (popup)->get_surface_anchor (popup);
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}
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/**
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* gdk_popup_get_rect_anchor:
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* @popup: a #GdkPopup
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*
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* Gets the current popup rectangle anchor.
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*
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* The value returned may change after calling gdk_popup_present(),
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* or after the "popup-layout-changed" is emitted.
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*
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* Returns: the current rectangle anchor value of @popup
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*/
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GdkGravity
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gdk_popup_get_rect_anchor (GdkPopup *popup)
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{
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g_return_val_if_fail (GDK_IS_POPUP (popup), GDK_GRAVITY_STATIC);
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return GDK_POPUP_GET_IFACE (popup)->get_rect_anchor (popup);
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}
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/**
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* gdk_popup_get_parent:
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* @popup: a #GdkPopup
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*
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* Returns the parent surface of a popup.
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*
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* Returns: (transfer none): the parent surface
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*/
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GdkSurface *
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gdk_popup_get_parent (GdkPopup *popup)
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{
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GdkSurface *surface;
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g_return_val_if_fail (GDK_IS_POPUP (popup), NULL);
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g_object_get (popup, "parent", &surface, NULL);
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if (surface)
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g_object_unref (surface);
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return surface;
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}
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/**
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* gdk_popup_get_position_x:
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* @popup: a #GdkPopup
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*
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* Obtains the position of the popup relative to its parent.
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*
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* Returns: the X coordinate of @popup position
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*/
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int
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gdk_popup_get_position_x (GdkPopup *popup)
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{
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g_return_val_if_fail (GDK_IS_POPUP (popup), 0);
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return GDK_POPUP_GET_IFACE (popup)->get_position_x (popup);
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}
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/**
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* gdk_popup_get_position_y:
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* @popup: a #GdkPopup
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*
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* Obtains the position of the popup relative to its parent.
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*
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* Returns: the Y coordinate of @popup position
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*/
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int
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gdk_popup_get_position_y (GdkPopup *popup)
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{
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g_return_val_if_fail (GDK_IS_POPUP (popup), 0);
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return GDK_POPUP_GET_IFACE (popup)->get_position_y (popup);
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}
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/**
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* gdk_popup_get_autohide:
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* @popup: a #GdkPopup
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*
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* Returns whether this popup is set to hide on outside clicks.
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*
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* Returns: %TRUE if @popup will autohide
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*/
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gboolean
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gdk_popup_get_autohide (GdkPopup *popup)
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{
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gboolean autohide;
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g_return_val_if_fail (GDK_IS_POPUP (popup), FALSE);
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g_object_get (popup, "autohide", &autohide, NULL);
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return autohide;
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}
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guint
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gdk_popup_install_properties (GObjectClass *object_class,
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guint first_prop)
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{
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g_object_class_override_property (object_class, first_prop + GDK_POPUP_PROP_PARENT, "parent");
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g_object_class_override_property (object_class, first_prop + GDK_POPUP_PROP_AUTOHIDE, "autohide");
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return GDK_POPUP_NUM_PROPERTIES;
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}
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