forked from AuroraMiddleware/gtk
6033b6457b
We don't need to cover every case with a va_marshaller, but there are a number of them that are useful because they will often only be connected to by a single signal handler. Generally speaking, if I opened into a file to add a va_marshaller, I just set all of them.
973 lines
28 KiB
C
973 lines
28 KiB
C
/*
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* gtkoverlay.c
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* This file is part of gtk
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*
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* Copyright (C) 2011 - Ignacio Casal Quinteiro, Mike Krüger
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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 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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#include "config.h"
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#include "gtkoverlay.h"
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#include "gtkbuildable.h"
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#include "gtkscrolledwindow.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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/**
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* SECTION:gtkoverlay
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* @short_description: A container which overlays widgets on top of each other
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* @title: GtkOverlay
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*
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* GtkOverlay is a container which contains a single main child, on top
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* of which it can place “overlay” widgets. The position of each overlay
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* widget is determined by its #GtkWidget:halign and #GtkWidget:valign
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* properties. E.g. a widget with both alignments set to %GTK_ALIGN_START
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* will be placed at the top left corner of the GtkOverlay container,
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* whereas an overlay with halign set to %GTK_ALIGN_CENTER and valign set
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* to %GTK_ALIGN_END will be placed a the bottom edge of the GtkOverlay,
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* horizontally centered. The position can be adjusted by setting the margin
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* properties of the child to non-zero values.
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*
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* More complicated placement of overlays is possible by connecting
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* to the #GtkOverlay::get-child-position signal.
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*
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* # GtkOverlay as GtkBuildable
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*
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* The GtkOverlay implementation of the GtkBuildable interface
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* supports placing a child as an overlay by specifying “overlay” as
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* the “type” attribute of a `<child>` element.
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*
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* # CSS nodes
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*
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* GtkOverlay has a single CSS node with the name “overlay”. Overlay children
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* whose alignments cause them to be positioned at an edge get the style classes
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* “.left”, “.right”, “.top”, and/or “.bottom” according to their position.
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*/
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struct _GtkOverlayPrivate
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{
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GSList *children;
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};
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typedef struct _GtkOverlayChild GtkOverlayChild;
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struct _GtkOverlayChild
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{
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GtkWidget *widget;
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GdkWindow *window;
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gboolean pass_through;
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};
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enum {
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GET_CHILD_POSITION,
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LAST_SIGNAL
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};
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enum
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{
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CHILD_PROP_0,
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CHILD_PROP_PASS_THROUGH,
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CHILD_PROP_INDEX
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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static void gtk_overlay_buildable_init (GtkBuildableIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkOverlay, gtk_overlay, GTK_TYPE_BIN,
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G_ADD_PRIVATE (GtkOverlay)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
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gtk_overlay_buildable_init))
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static void
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gtk_overlay_compute_child_allocation (GtkOverlay *overlay,
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GtkOverlayChild *child,
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GtkAllocation *window_allocation,
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GtkAllocation *widget_allocation)
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{
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gint left, right, top, bottom;
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GtkAllocation allocation, overlay_allocation;
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gboolean result;
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g_signal_emit (overlay, signals[GET_CHILD_POSITION],
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0, child->widget, &allocation, &result);
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gtk_widget_get_allocation (GTK_WIDGET (overlay), &overlay_allocation);
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allocation.x += overlay_allocation.x;
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allocation.y += overlay_allocation.y;
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/* put the margins outside the window; also arrange things
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* so that the adjusted child allocation still ends up at 0, 0
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*/
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left = gtk_widget_get_margin_start (child->widget);
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right = gtk_widget_get_margin_end (child->widget);
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top = gtk_widget_get_margin_top (child->widget);
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bottom = gtk_widget_get_margin_bottom (child->widget);
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if (widget_allocation)
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{
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widget_allocation->x = - left;
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widget_allocation->y = - top;
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widget_allocation->width = allocation.width;
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widget_allocation->height = allocation.height;
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}
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if (window_allocation)
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{
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window_allocation->x = allocation.x + left;
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window_allocation->y = allocation.y + top;
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window_allocation->width = allocation.width - (left + right);
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window_allocation->height = allocation.height - (top + bottom);
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}
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}
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static GdkWindow *
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gtk_overlay_create_child_window (GtkOverlay *overlay,
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GtkOverlayChild *child)
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{
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GtkWidget *widget = GTK_WIDGET (overlay);
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GtkAllocation allocation;
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GdkWindow *window;
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GdkWindowAttr attributes;
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gint attributes_mask;
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gtk_overlay_compute_child_allocation (overlay, child, &allocation, NULL);
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.width = allocation.width;
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attributes.height = allocation.height;
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attributes.x = allocation.x;
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attributes.y = allocation.y;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
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attributes.event_mask = gtk_widget_get_events (widget);
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window = gdk_window_new (gtk_widget_get_window (widget),
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&attributes, attributes_mask);
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gtk_widget_register_window (widget, window);
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gdk_window_set_pass_through (window, child->pass_through);
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gtk_widget_set_parent_window (child->widget, window);
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return window;
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}
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static GtkAlign
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effective_align (GtkAlign align,
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GtkTextDirection direction)
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{
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switch (align)
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{
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case GTK_ALIGN_START:
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return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
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case GTK_ALIGN_END:
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return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
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default:
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return align;
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}
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}
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static void
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gtk_overlay_get_main_widget_allocation (GtkOverlay *overlay,
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GtkAllocation *main_alloc_out)
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{
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GtkWidget *main_widget;
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GtkAllocation main_alloc;
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main_widget = gtk_bin_get_child (GTK_BIN (overlay));
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/* special-case scrolled windows */
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if (GTK_IS_SCROLLED_WINDOW (main_widget))
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{
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GtkWidget *grandchild;
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gint x, y;
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gboolean res;
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grandchild = gtk_bin_get_child (GTK_BIN (main_widget));
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res = gtk_widget_translate_coordinates (grandchild, main_widget, 0, 0, &x, &y);
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if (res)
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{
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main_alloc.x = x;
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main_alloc.y = y;
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}
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else
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{
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main_alloc.x = 0;
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main_alloc.y = 0;
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}
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main_alloc.width = gtk_widget_get_allocated_width (grandchild);
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main_alloc.height = gtk_widget_get_allocated_height (grandchild);
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}
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else
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{
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main_alloc.x = 0;
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main_alloc.y = 0;
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main_alloc.width = gtk_widget_get_allocated_width (GTK_WIDGET (overlay));
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main_alloc.height = gtk_widget_get_allocated_height (GTK_WIDGET (overlay));
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}
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if (main_alloc_out)
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*main_alloc_out = main_alloc;
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}
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static void
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gtk_overlay_child_update_style_classes (GtkOverlay *overlay,
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GtkWidget *child,
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GtkAllocation *child_allocation)
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{
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GtkAllocation overlay_allocation, main_allocation;
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GtkAlign valign, halign;
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gboolean is_left, is_right, is_top, is_bottom;
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gboolean has_left, has_right, has_top, has_bottom;
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GtkStyleContext *context;
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context = gtk_widget_get_style_context (child);
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has_left = gtk_style_context_has_class (context, GTK_STYLE_CLASS_LEFT);
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has_right = gtk_style_context_has_class (context, GTK_STYLE_CLASS_RIGHT);
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has_top = gtk_style_context_has_class (context, GTK_STYLE_CLASS_TOP);
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has_bottom = gtk_style_context_has_class (context, GTK_STYLE_CLASS_BOTTOM);
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is_left = is_right = is_top = is_bottom = FALSE;
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gtk_overlay_get_main_widget_allocation (overlay, &main_allocation);
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gtk_widget_get_allocation (GTK_WIDGET (overlay), &overlay_allocation);
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main_allocation.x += overlay_allocation.x;
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main_allocation.y += overlay_allocation.y;
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halign = effective_align (gtk_widget_get_halign (child),
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gtk_widget_get_direction (child));
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if (halign == GTK_ALIGN_START)
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is_left = (child_allocation->x == main_allocation.x);
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else if (halign == GTK_ALIGN_END)
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is_right = (child_allocation->x + child_allocation->width ==
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main_allocation.x + main_allocation.width);
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valign = gtk_widget_get_valign (child);
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if (valign == GTK_ALIGN_START)
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is_top = (child_allocation->y == main_allocation.y);
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else if (valign == GTK_ALIGN_END)
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is_bottom = (child_allocation->y + child_allocation->height ==
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main_allocation.y + main_allocation.height);
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if (has_left && !is_left)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
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else if (!has_left && is_left)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
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if (has_right && !is_right)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
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else if (!has_right && is_right)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
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if (has_top && !is_top)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
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else if (!has_top && is_top)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
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if (has_bottom && !is_bottom)
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gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
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else if (!has_bottom && is_bottom)
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
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}
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static void
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gtk_overlay_child_allocate (GtkOverlay *overlay,
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GtkOverlayChild *child)
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{
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GtkAllocation window_allocation, child_allocation;
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if (gtk_widget_get_mapped (GTK_WIDGET (overlay)))
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{
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/* Note: This calls show every size allocation, which makes
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* us keep the z-order of the chilren, as gdk_window_show()
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* does an implicit raise. */
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if (gtk_widget_get_visible (child->widget))
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gdk_window_show (child->window);
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else if (gdk_window_is_visible (child->window))
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gdk_window_hide (child->window);
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}
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if (!gtk_widget_get_visible (child->widget))
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return;
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gtk_overlay_compute_child_allocation (overlay, child, &window_allocation, &child_allocation);
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if (child->window)
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gdk_window_move_resize (child->window,
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window_allocation.x, window_allocation.y,
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window_allocation.width, window_allocation.height);
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gtk_overlay_child_update_style_classes (overlay, child->widget, &window_allocation);
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gtk_widget_size_allocate (child->widget, &child_allocation);
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}
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static void
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gtk_overlay_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
|
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{
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GtkOverlay *overlay = GTK_OVERLAY (widget);
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GtkOverlayPrivate *priv = overlay->priv;
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GSList *children;
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GtkWidget *main_widget;
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GTK_WIDGET_CLASS (gtk_overlay_parent_class)->size_allocate (widget, allocation);
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main_widget = gtk_bin_get_child (GTK_BIN (overlay));
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if (main_widget && gtk_widget_get_visible (main_widget))
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gtk_widget_size_allocate (main_widget, allocation);
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for (children = priv->children; children; children = children->next)
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gtk_overlay_child_allocate (overlay, children->data);
|
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}
|
||
|
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static gboolean
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gtk_overlay_get_child_position (GtkOverlay *overlay,
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GtkWidget *widget,
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GtkAllocation *alloc)
|
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{
|
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GtkAllocation main_alloc;
|
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GtkRequisition min, req;
|
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GtkAlign halign;
|
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GtkTextDirection direction;
|
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gtk_overlay_get_main_widget_allocation (overlay, &main_alloc);
|
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gtk_widget_get_preferred_size (widget, &min, &req);
|
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alloc->x = main_alloc.x;
|
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alloc->width = MAX (min.width, MIN (main_alloc.width, req.width));
|
||
|
||
direction = gtk_widget_get_direction (widget);
|
||
|
||
halign = gtk_widget_get_halign (widget);
|
||
switch (effective_align (halign, direction))
|
||
{
|
||
case GTK_ALIGN_START:
|
||
/* nothing to do */
|
||
break;
|
||
case GTK_ALIGN_FILL:
|
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alloc->width = MAX (alloc->width, main_alloc.width);
|
||
break;
|
||
case GTK_ALIGN_CENTER:
|
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alloc->x += main_alloc.width / 2 - alloc->width / 2;
|
||
break;
|
||
case GTK_ALIGN_END:
|
||
alloc->x += main_alloc.width - alloc->width;
|
||
break;
|
||
case GTK_ALIGN_BASELINE:
|
||
default:
|
||
g_assert_not_reached ();
|
||
break;
|
||
}
|
||
|
||
alloc->y = main_alloc.y;
|
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alloc->height = MAX (min.height, MIN (main_alloc.height, req.height));
|
||
|
||
switch (gtk_widget_get_valign (widget))
|
||
{
|
||
case GTK_ALIGN_START:
|
||
/* nothing to do */
|
||
break;
|
||
case GTK_ALIGN_FILL:
|
||
alloc->height = MAX (alloc->height, main_alloc.height);
|
||
break;
|
||
case GTK_ALIGN_CENTER:
|
||
alloc->y += main_alloc.height / 2 - alloc->height / 2;
|
||
break;
|
||
case GTK_ALIGN_END:
|
||
alloc->y += main_alloc.height - alloc->height;
|
||
break;
|
||
case GTK_ALIGN_BASELINE:
|
||
default:
|
||
g_assert_not_reached ();
|
||
break;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_realize (GtkWidget *widget)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (widget);
|
||
GtkOverlayPrivate *priv = overlay->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children;
|
||
|
||
GTK_WIDGET_CLASS (gtk_overlay_parent_class)->realize (widget);
|
||
|
||
for (children = priv->children; children; children = children->next)
|
||
{
|
||
child = children->data;
|
||
|
||
if (child->window == NULL)
|
||
child->window = gtk_overlay_create_child_window (overlay, child);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_unrealize (GtkWidget *widget)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (widget);
|
||
GtkOverlayPrivate *priv = overlay->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children;
|
||
|
||
for (children = priv->children; children; children = children->next)
|
||
{
|
||
child = children->data;
|
||
|
||
gtk_widget_set_parent_window (child->widget, NULL);
|
||
gtk_widget_unregister_window (widget, child->window);
|
||
gdk_window_destroy (child->window);
|
||
child->window = NULL;
|
||
}
|
||
|
||
GTK_WIDGET_CLASS (gtk_overlay_parent_class)->unrealize (widget);
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_map (GtkWidget *widget)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (widget);
|
||
GtkOverlayPrivate *priv = overlay->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children;
|
||
|
||
GTK_WIDGET_CLASS (gtk_overlay_parent_class)->map (widget);
|
||
|
||
for (children = priv->children; children; children = children->next)
|
||
{
|
||
child = children->data;
|
||
|
||
if (child->window != NULL &&
|
||
gtk_widget_get_visible (child->widget) &&
|
||
gtk_widget_get_child_visible (child->widget))
|
||
gdk_window_show (child->window);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_unmap (GtkWidget *widget)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (widget);
|
||
GtkOverlayPrivate *priv = overlay->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children;
|
||
|
||
for (children = priv->children; children; children = children->next)
|
||
{
|
||
child = children->data;
|
||
|
||
if (child->window != NULL &&
|
||
gdk_window_is_visible (child->window))
|
||
gdk_window_hide (child->window);
|
||
}
|
||
|
||
GTK_WIDGET_CLASS (gtk_overlay_parent_class)->unmap (widget);
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_remove (GtkContainer *container,
|
||
GtkWidget *widget)
|
||
{
|
||
GtkOverlayPrivate *priv = GTK_OVERLAY (container)->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children, *next;
|
||
gboolean removed;
|
||
|
||
removed = FALSE;
|
||
for (children = priv->children; children; children = next)
|
||
{
|
||
child = children->data;
|
||
next = children->next;
|
||
|
||
if (child->widget == widget)
|
||
{
|
||
if (child->window != NULL)
|
||
{
|
||
gtk_widget_unregister_window (GTK_WIDGET (container), child->window);
|
||
gdk_window_destroy (child->window);
|
||
}
|
||
|
||
gtk_widget_unparent (widget);
|
||
|
||
priv->children = g_slist_delete_link (priv->children, children);
|
||
g_slice_free (GtkOverlayChild, child);
|
||
|
||
removed = TRUE;
|
||
}
|
||
else if (removed)
|
||
gtk_widget_child_notify (child->widget, "index");
|
||
}
|
||
|
||
if (!removed)
|
||
GTK_CONTAINER_CLASS (gtk_overlay_parent_class)->remove (container, widget);
|
||
}
|
||
|
||
/**
|
||
* gtk_overlay_reorder_overlay:
|
||
* @overlay: a #GtkOverlay
|
||
* @child: the overlaid #GtkWidget to move
|
||
* @position: the new index for @child in the list of overlay children
|
||
* of @overlay, starting from 0. If negative, indicates the end of
|
||
* the list
|
||
*
|
||
* Moves @child to a new @index in the list of @overlay children.
|
||
* The list contains overlays in the order that these were
|
||
* added to @overlay.
|
||
*
|
||
* A widget’s index in the @overlay children list determines which order
|
||
* the children are drawn if they overlap. The first child is drawn at
|
||
* the bottom. It also affects the default focus chain order.
|
||
*
|
||
* Since: 3.18
|
||
*/
|
||
void
|
||
gtk_overlay_reorder_overlay (GtkOverlay *overlay,
|
||
GtkWidget *child,
|
||
gint position)
|
||
{
|
||
GtkOverlayPrivate *priv;
|
||
GSList *old_link;
|
||
GSList *new_link;
|
||
GSList *l;
|
||
GtkOverlayChild *child_info = NULL;
|
||
gint old_index, i;
|
||
gint index;
|
||
|
||
g_return_if_fail (GTK_IS_OVERLAY (overlay));
|
||
g_return_if_fail (GTK_IS_WIDGET (child));
|
||
|
||
priv = GTK_OVERLAY (overlay)->priv;
|
||
|
||
old_link = priv->children;
|
||
old_index = 0;
|
||
while (old_link)
|
||
{
|
||
child_info = old_link->data;
|
||
if (child_info->widget == child)
|
||
break;
|
||
|
||
old_link = old_link->next;
|
||
old_index++;
|
||
}
|
||
|
||
g_return_if_fail (old_link != NULL);
|
||
|
||
if (position < 0)
|
||
{
|
||
new_link = NULL;
|
||
index = g_slist_length (priv->children) - 1;
|
||
}
|
||
else
|
||
{
|
||
new_link = g_slist_nth (priv->children, position);
|
||
index = MIN (position, g_slist_length (priv->children) - 1);
|
||
}
|
||
|
||
if (index == old_index)
|
||
return;
|
||
|
||
priv->children = g_slist_delete_link (priv->children, old_link);
|
||
priv->children = g_slist_insert_before (priv->children, new_link, child_info);
|
||
|
||
for (i = 0, l = priv->children; l != NULL; l = l->next, i++)
|
||
{
|
||
GtkOverlayChild *info = l->data;
|
||
if ((i < index && i < old_index) ||
|
||
(i > index && i > old_index))
|
||
continue;
|
||
gtk_widget_child_notify (info->widget, "index");
|
||
}
|
||
|
||
if (gtk_widget_get_visible (child) &&
|
||
gtk_widget_get_visible (GTK_WIDGET (overlay)))
|
||
gtk_widget_queue_resize (GTK_WIDGET (overlay));
|
||
}
|
||
|
||
|
||
static void
|
||
gtk_overlay_forall (GtkContainer *overlay,
|
||
gboolean include_internals,
|
||
GtkCallback callback,
|
||
gpointer callback_data)
|
||
{
|
||
GtkOverlayPrivate *priv = GTK_OVERLAY (overlay)->priv;
|
||
GtkOverlayChild *child;
|
||
GSList *children;
|
||
GtkWidget *main_widget;
|
||
|
||
main_widget = gtk_bin_get_child (GTK_BIN (overlay));
|
||
if (main_widget)
|
||
(* callback) (main_widget, callback_data);
|
||
|
||
children = priv->children;
|
||
while (children)
|
||
{
|
||
child = children->data;
|
||
children = children->next;
|
||
|
||
(* callback) (child->widget, callback_data);
|
||
}
|
||
}
|
||
|
||
static GtkOverlayChild *
|
||
gtk_overlay_get_overlay_child (GtkOverlay *overlay,
|
||
GtkWidget *child)
|
||
{
|
||
GtkOverlayPrivate *priv = GTK_OVERLAY (overlay)->priv;
|
||
GtkOverlayChild *child_info;
|
||
GSList *children;
|
||
|
||
for (children = priv->children; children; children = children->next)
|
||
{
|
||
child_info = children->data;
|
||
|
||
if (child_info->widget == child)
|
||
return child_info;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_set_child_property (GtkContainer *container,
|
||
GtkWidget *child,
|
||
guint property_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (container);
|
||
GtkOverlayChild *child_info;
|
||
GtkWidget *main_widget;
|
||
|
||
main_widget = gtk_bin_get_child (GTK_BIN (overlay));
|
||
if (child == main_widget)
|
||
child_info = NULL;
|
||
else
|
||
{
|
||
child_info = gtk_overlay_get_overlay_child (overlay, child);
|
||
if (child_info == NULL)
|
||
{
|
||
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
|
||
return;
|
||
}
|
||
}
|
||
|
||
switch (property_id)
|
||
{
|
||
case CHILD_PROP_PASS_THROUGH:
|
||
/* Ignore value on main child */
|
||
if (child_info)
|
||
{
|
||
if (g_value_get_boolean (value) != child_info->pass_through)
|
||
{
|
||
child_info->pass_through = g_value_get_boolean (value);
|
||
if (child_info->window)
|
||
gdk_window_set_pass_through (child_info->window, child_info->pass_through);
|
||
gtk_container_child_notify (container, child, "pass-through");
|
||
}
|
||
}
|
||
break;
|
||
case CHILD_PROP_INDEX:
|
||
if (child_info != NULL)
|
||
gtk_overlay_reorder_overlay (GTK_OVERLAY (container),
|
||
child,
|
||
g_value_get_int (value));
|
||
break;
|
||
|
||
default:
|
||
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_get_child_property (GtkContainer *container,
|
||
GtkWidget *child,
|
||
guint property_id,
|
||
GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkOverlay *overlay = GTK_OVERLAY (container);
|
||
GtkOverlayPrivate *priv = GTK_OVERLAY (overlay)->priv;
|
||
GtkOverlayChild *child_info;
|
||
GtkWidget *main_widget;
|
||
|
||
main_widget = gtk_bin_get_child (GTK_BIN (overlay));
|
||
if (child == main_widget)
|
||
child_info = NULL;
|
||
else
|
||
{
|
||
child_info = gtk_overlay_get_overlay_child (overlay, child);
|
||
if (child_info == NULL)
|
||
{
|
||
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
|
||
return;
|
||
}
|
||
}
|
||
|
||
switch (property_id)
|
||
{
|
||
case CHILD_PROP_PASS_THROUGH:
|
||
if (child_info)
|
||
g_value_set_boolean (value, child_info->pass_through);
|
||
else
|
||
g_value_set_boolean (value, FALSE);
|
||
break;
|
||
case CHILD_PROP_INDEX:
|
||
g_value_set_int (value, g_slist_index (priv->children, child_info));
|
||
break;
|
||
default:
|
||
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
gtk_overlay_class_init (GtkOverlayClass *klass)
|
||
{
|
||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
|
||
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
|
||
|
||
widget_class->size_allocate = gtk_overlay_size_allocate;
|
||
widget_class->realize = gtk_overlay_realize;
|
||
widget_class->unrealize = gtk_overlay_unrealize;
|
||
widget_class->map = gtk_overlay_map;
|
||
widget_class->unmap = gtk_overlay_unmap;
|
||
|
||
container_class->remove = gtk_overlay_remove;
|
||
container_class->forall = gtk_overlay_forall;
|
||
container_class->set_child_property = gtk_overlay_set_child_property;
|
||
container_class->get_child_property = gtk_overlay_get_child_property;
|
||
|
||
klass->get_child_position = gtk_overlay_get_child_position;
|
||
|
||
/**
|
||
* GtkOverlay:pass-through:
|
||
*
|
||
* Pass through input, does not affect main child.
|
||
*
|
||
* Since: 3.18
|
||
*/
|
||
gtk_container_class_install_child_property (container_class, CHILD_PROP_PASS_THROUGH,
|
||
g_param_spec_boolean ("pass-through", P_("Pass Through"), P_("Pass through input, does not affect main child"),
|
||
FALSE,
|
||
GTK_PARAM_READWRITE));
|
||
|
||
/**
|
||
* GtkOverlay:index:
|
||
*
|
||
* The index of the overlay in the parent, -1 for the main child.
|
||
*
|
||
* Since: 3.18
|
||
*/
|
||
gtk_container_class_install_child_property (container_class, CHILD_PROP_INDEX,
|
||
g_param_spec_int ("index",
|
||
P_("Index"),
|
||
P_("The index of the overlay in the parent, -1 for the main child"),
|
||
-1, G_MAXINT, 0,
|
||
GTK_PARAM_READWRITE));
|
||
|
||
/**
|
||
* GtkOverlay::get-child-position:
|
||
* @overlay: the #GtkOverlay
|
||
* @widget: the child widget to position
|
||
* @allocation: (type Gdk.Rectangle) (out caller-allocates): return
|
||
* location for the allocation
|
||
*
|
||
* The ::get-child-position signal is emitted to determine
|
||
* the position and size of any overlay child widgets. A
|
||
* handler for this signal should fill @allocation with
|
||
* the desired position and size for @widget, relative to
|
||
* the 'main' child of @overlay.
|
||
*
|
||
* The default handler for this signal uses the @widget's
|
||
* halign and valign properties to determine the position
|
||
* and gives the widget its natural size (except that an
|
||
* alignment of %GTK_ALIGN_FILL will cause the overlay to
|
||
* be full-width/height). If the main child is a
|
||
* #GtkScrolledWindow, the overlays are placed relative
|
||
* to its contents.
|
||
*
|
||
* Returns: %TRUE if the @allocation has been filled
|
||
*/
|
||
signals[GET_CHILD_POSITION] =
|
||
g_signal_new (I_("get-child-position"),
|
||
G_TYPE_FROM_CLASS (object_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (GtkOverlayClass, get_child_position),
|
||
_gtk_boolean_handled_accumulator, NULL,
|
||
_gtk_marshal_BOOLEAN__OBJECT_BOXED,
|
||
G_TYPE_BOOLEAN, 2,
|
||
GTK_TYPE_WIDGET,
|
||
GDK_TYPE_RECTANGLE | G_SIGNAL_TYPE_STATIC_SCOPE);
|
||
g_signal_set_va_marshaller (signals[GET_CHILD_POSITION],
|
||
G_TYPE_FROM_CLASS (object_class),
|
||
_gtk_marshal_BOOLEAN__OBJECT_BOXEDv);
|
||
|
||
gtk_widget_class_set_css_name (widget_class, "overlay");
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_init (GtkOverlay *overlay)
|
||
{
|
||
overlay->priv = gtk_overlay_get_instance_private (overlay);
|
||
|
||
gtk_widget_set_has_window (GTK_WIDGET (overlay), FALSE);
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_buildable_add_child (GtkBuildable *buildable,
|
||
GtkBuilder *builder,
|
||
GObject *child,
|
||
const gchar *type)
|
||
{
|
||
if (type && strcmp (type, "overlay") == 0)
|
||
gtk_overlay_add_overlay (GTK_OVERLAY (buildable), GTK_WIDGET (child));
|
||
else if (!type)
|
||
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
|
||
else
|
||
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
|
||
}
|
||
|
||
static void
|
||
gtk_overlay_buildable_init (GtkBuildableIface *iface)
|
||
{
|
||
iface->add_child = gtk_overlay_buildable_add_child;
|
||
}
|
||
|
||
/**
|
||
* gtk_overlay_new:
|
||
*
|
||
* Creates a new #GtkOverlay.
|
||
*
|
||
* Returns: a new #GtkOverlay object.
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
GtkWidget *
|
||
gtk_overlay_new (void)
|
||
{
|
||
return g_object_new (GTK_TYPE_OVERLAY, NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_overlay_add_overlay:
|
||
* @overlay: a #GtkOverlay
|
||
* @widget: a #GtkWidget to be added to the container
|
||
*
|
||
* Adds @widget to @overlay.
|
||
*
|
||
* The widget will be stacked on top of the main widget
|
||
* added with gtk_container_add().
|
||
*
|
||
* The position at which @widget is placed is determined
|
||
* from its #GtkWidget:halign and #GtkWidget:valign properties.
|
||
*
|
||
* Since: 3.2
|
||
*/
|
||
void
|
||
gtk_overlay_add_overlay (GtkOverlay *overlay,
|
||
GtkWidget *widget)
|
||
{
|
||
GtkOverlayPrivate *priv;
|
||
GtkOverlayChild *child;
|
||
|
||
g_return_if_fail (GTK_IS_OVERLAY (overlay));
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
priv = overlay->priv;
|
||
child = g_slice_new0 (GtkOverlayChild);
|
||
child->widget = widget;
|
||
|
||
priv->children = g_slist_append (priv->children, child);
|
||
|
||
if (gtk_widget_get_realized (GTK_WIDGET (overlay)))
|
||
{
|
||
child->window = gtk_overlay_create_child_window (overlay, child);
|
||
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
|
||
}
|
||
else
|
||
gtk_widget_set_parent (widget, GTK_WIDGET (overlay));
|
||
|
||
gtk_widget_child_notify (widget, "index");
|
||
}
|
||
|
||
/**
|
||
* gtk_overlay_set_overlay_pass_through:
|
||
* @overlay: a #GtkOverlay
|
||
* @widget: an overlay child of #GtkOverlay
|
||
* @pass_through: whether the child should pass the input through
|
||
*
|
||
* Convenience function to set the value of the #GtkOverlay:pass-through
|
||
* child property for @widget.
|
||
*
|
||
* Since: 3.18
|
||
*/
|
||
void
|
||
gtk_overlay_set_overlay_pass_through (GtkOverlay *overlay,
|
||
GtkWidget *widget,
|
||
gboolean pass_through)
|
||
{
|
||
g_return_if_fail (GTK_IS_OVERLAY (overlay));
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
gtk_container_child_set (GTK_CONTAINER (overlay), widget,
|
||
"pass-through", pass_through,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_overlay_get_overlay_pass_through:
|
||
* @overlay: a #GtkOverlay
|
||
* @widget: an overlay child of #GtkOverlay
|
||
*
|
||
* Convenience function to get the value of the #GtkOverlay:pass-through
|
||
* child property for @widget.
|
||
*
|
||
* Returns: whether the widget is a pass through child.
|
||
*
|
||
* Since: 3.18
|
||
*/
|
||
gboolean
|
||
gtk_overlay_get_overlay_pass_through (GtkOverlay *overlay,
|
||
GtkWidget *widget)
|
||
{
|
||
gboolean pass_through;
|
||
|
||
g_return_val_if_fail (GTK_IS_OVERLAY (overlay), FALSE);
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
|
||
|
||
gtk_container_child_get (GTK_CONTAINER (overlay), widget,
|
||
"pass-through", &pass_through,
|
||
NULL);
|
||
|
||
return pass_through;
|
||
}
|