[nautilus] overlay: borrow GeditOverlay implementation from gedit
- From: Cosimo Cecchi <cosimoc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [nautilus] overlay: borrow GeditOverlay implementation from gedit
- Date: Thu, 17 Feb 2011 16:28:27 +0000 (UTC)
commit c16127a438ff9654cbd63dbbc3859dc9916d0160
Author: Cosimo Cecchi <cosimoc gnome org>
Date: Fri Feb 11 15:44:10 2011 -0500
overlay: borrow GeditOverlay implementation from gedit
src/Makefile.am | 4 +
src/gedit-overlay-child.c | 407 +++++++++++++++++++++++++++
src/gedit-overlay-child.h | 89 ++++++
src/gedit-overlay.c | 687 +++++++++++++++++++++++++++++++++++++++++++++
src/gedit-overlay.h | 70 +++++
5 files changed, 1257 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 13efcf6..a79978c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -49,6 +49,10 @@ BUILT_SOURCES = \
$(NULL)
nautilus_SOURCES = \
+ gedit-overlay.h \
+ gedit-overlay.c \
+ gedit-overlay-child.h \
+ gedit-overlay-child.c \
nautilus-actions.h \
nautilus-application.c \
nautilus-application.h \
diff --git a/src/gedit-overlay-child.c b/src/gedit-overlay-child.c
new file mode 100644
index 0000000..c460c7f
--- /dev/null
+++ b/src/gedit-overlay-child.c
@@ -0,0 +1,407 @@
+/*
+ * gedit-overlay-child.c
+ * This file is part of gedit
+ *
+ * Copyright (C) 2011 - Ignacio Casal Quinteiro
+ *
+ * gedit 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 2.1 of the License, or (at your option) any later version.
+ *
+ * gedit 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "gedit-overlay-child.h"
+
+struct _GeditOverlayChildPrivate
+{
+ GtkWidget *widget;
+ GtkAllocation widget_alloc;
+ GeditOverlayChildPosition position;
+ guint offset;
+ gboolean fixed;
+};
+
+enum
+{
+ PROP_0,
+ PROP_WIDGET,
+ PROP_POSITION,
+ PROP_OFFSET,
+ PROP_FIXED
+};
+
+G_DEFINE_TYPE (GeditOverlayChild, gedit_overlay_child, GTK_TYPE_BIN)
+
+static void
+gedit_overlay_child_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (object);
+
+ switch (prop_id)
+ {
+ case PROP_WIDGET:
+ g_value_set_object (value, child->priv->widget);
+ break;
+ case PROP_POSITION:
+ g_value_set_uint (value, child->priv->position);
+ break;
+ case PROP_OFFSET:
+ g_value_set_uint (value, child->priv->offset);
+ break;
+ case PROP_FIXED:
+ g_value_set_boolean (value, child->priv->fixed);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gedit_overlay_child_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (object);
+
+ switch (prop_id)
+ {
+ case PROP_WIDGET:
+ gtk_container_add (GTK_CONTAINER (child),
+ g_value_get_object (value));
+ break;
+ case PROP_POSITION:
+ child->priv->position = g_value_get_uint (value);
+ break;
+ case PROP_OFFSET:
+ child->priv->offset = g_value_get_uint (value);
+ break;
+ case PROP_FIXED:
+ child->priv->fixed = g_value_get_boolean (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gedit_overlay_child_realize (GtkWidget *widget)
+{
+ GdkWindowAttr attributes;
+ GdkWindow *parent_window;
+ GdkWindow *window;
+ GtkStyleContext *context;
+
+ gtk_widget_set_realized (widget, TRUE);
+
+ parent_window = gtk_widget_get_parent_window (widget);
+ context = gtk_widget_get_style_context (widget);
+
+ attributes.window_type = GDK_WINDOW_CHILD;
+ attributes.wclass = GDK_INPUT_OUTPUT;
+ attributes.event_mask = GDK_EXPOSURE_MASK;
+
+ window = gdk_window_new (parent_window, &attributes, 0);
+ gdk_window_set_user_data (window, widget);
+ gtk_widget_set_window (widget, window);
+ gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
+ gtk_style_context_set_background (context, window);
+}
+
+static void
+gedit_overlay_child_get_preferred_width (GtkWidget *widget,
+ gint *minimum,
+ gint *natural)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (widget);
+ gint width;
+
+ if (child->priv->widget != NULL)
+ {
+ gint child_min, child_nat;
+
+ gtk_widget_get_preferred_width (child->priv->widget,
+ &child_min, &child_nat);
+ child->priv->widget_alloc.width = child_min;
+ }
+
+ width = child->priv->widget_alloc.width;
+ *minimum = *natural = width;
+}
+
+static void
+gedit_overlay_child_get_preferred_height (GtkWidget *widget,
+ gint *minimum,
+ gint *natural)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (widget);
+ gint height;
+
+ if (child->priv->widget != NULL)
+ {
+ gint child_min, child_nat;
+
+ gtk_widget_get_preferred_height (child->priv->widget,
+ &child_min, &child_nat);
+ child->priv->widget_alloc.height = child_min;
+ }
+
+ height = child->priv->widget_alloc.height;
+ *minimum = *natural = height;
+}
+
+static void
+gedit_overlay_child_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (widget);
+
+ GTK_WIDGET_CLASS (gedit_overlay_child_parent_class)->size_allocate (widget, allocation);
+
+ if (child->priv->widget != NULL &&
+ child->priv->widget_alloc.height &&
+ child->priv->widget_alloc.width)
+ {
+ gtk_widget_size_allocate (child->priv->widget,
+ &child->priv->widget_alloc);
+ }
+}
+
+static void
+gedit_overlay_child_add (GtkContainer *container,
+ GtkWidget *widget)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (container);
+
+ child->priv->widget = widget;
+
+ GTK_CONTAINER_CLASS (gedit_overlay_child_parent_class)->add (container, widget);
+}
+
+static void
+gedit_overlay_child_remove (GtkContainer *container,
+ GtkWidget *widget)
+{
+ GeditOverlayChild *child = GEDIT_OVERLAY_CHILD (container);
+
+ child->priv->widget = NULL;
+
+ GTK_CONTAINER_CLASS (gedit_overlay_child_parent_class)->remove (container, widget);
+}
+
+static void
+gedit_overlay_child_class_init (GeditOverlayChildClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+ GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+
+ object_class->get_property = gedit_overlay_child_get_property;
+ object_class->set_property = gedit_overlay_child_set_property;
+
+ widget_class->realize = gedit_overlay_child_realize;
+ widget_class->get_preferred_width = gedit_overlay_child_get_preferred_width;
+ widget_class->get_preferred_height = gedit_overlay_child_get_preferred_height;
+ widget_class->size_allocate = gedit_overlay_child_size_allocate;
+
+ container_class->add = gedit_overlay_child_add;
+ container_class->remove = gedit_overlay_child_remove;
+
+ g_object_class_install_property (object_class, PROP_WIDGET,
+ g_param_spec_object ("widget",
+ "Widget",
+ "The Widget",
+ GTK_TYPE_WIDGET,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY |
+ G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (object_class, PROP_POSITION,
+ g_param_spec_uint ("position",
+ "Position",
+ "The Widget Position",
+ 1, GEDIT_OVERLAY_CHILD_POSITION_STATIC,
+ GEDIT_OVERLAY_CHILD_POSITION_STATIC,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT |
+ G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (object_class, PROP_OFFSET,
+ g_param_spec_uint ("offset",
+ "Offset",
+ "The Widget Offset",
+ 0,
+ G_MAXUINT,
+ 0,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT |
+ G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (object_class, PROP_FIXED,
+ g_param_spec_boolean ("fixed",
+ "Fixed",
+ "Wether the Widget is in a fixed position",
+ TRUE,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT |
+ G_PARAM_STATIC_STRINGS));
+
+ g_type_class_add_private (object_class, sizeof (GeditOverlayChildPrivate));
+}
+
+static void
+gedit_overlay_child_init (GeditOverlayChild *child)
+{
+ child->priv = G_TYPE_INSTANCE_GET_PRIVATE (child,
+ GEDIT_TYPE_OVERLAY_CHILD,
+ GeditOverlayChildPrivate);
+
+ gtk_widget_set_has_window (GTK_WIDGET (child), TRUE);
+}
+
+/**
+ * gedit_overlay_child_new:
+ * @widget: a #GtkWidget
+ *
+ * Creates a new #GeditOverlayChild object
+ *
+ * Returns: a new #GeditOverlayChild object
+ */
+GeditOverlayChild *
+gedit_overlay_child_new (GtkWidget *widget)
+{
+ return g_object_new (GEDIT_TYPE_OVERLAY_CHILD,
+ "widget", widget,
+ NULL);
+}
+
+/**
+ * gedit_overlay_child_get_position:
+ * @child: a #GeditOverlayChild
+ *
+ * Gets the position of the widget
+ *
+ * Returns: wether the child should be placed in a #GeditOverlay
+ */
+GeditOverlayChildPosition
+gedit_overlay_child_get_position (GeditOverlayChild *child)
+{
+ g_return_val_if_fail (GEDIT_IS_OVERLAY_CHILD (child), GEDIT_OVERLAY_CHILD_POSITION_STATIC);
+
+ return child->priv->position;
+}
+
+/**
+ * gedit_overlay_child_set_position:
+ * @child: a #GeditOverlayChild
+ * @position: a #GeditOverlayChildPosition
+ *
+ * Sets the new position for @child
+ */
+void
+gedit_overlay_child_set_position (GeditOverlayChild *child,
+ GeditOverlayChildPosition position)
+{
+ g_return_if_fail (GEDIT_IS_OVERLAY_CHILD (child));
+
+ if (child->priv->position != position)
+ {
+ child->priv->position = position;
+
+ g_object_notify (G_OBJECT (child), "position");
+ }
+}
+
+/**
+ * gedit_overlay_child_get_offset:
+ * @child: a #GeditOverlayChild
+ *
+ * Gets the offset for @child. The offset is usually used by #GeditOverlay
+ * to not place the widget directly in the border of the container
+ *
+ * Returns: the offset for @child
+ */
+guint
+gedit_overlay_child_get_offset (GeditOverlayChild *child)
+{
+ g_return_val_if_fail (GEDIT_IS_OVERLAY_CHILD (child), 0);
+
+ return child->priv->offset;
+}
+
+/**
+ * gedit_overlay_child_set_offset:
+ * @child: a #GeditOverlayChild
+ * @offset: the offset for @child
+ *
+ * Sets the new offset for @child
+ */
+void
+gedit_overlay_child_set_offset (GeditOverlayChild *child,
+ guint offset)
+{
+ g_return_if_fail (GEDIT_IS_OVERLAY_CHILD (child));
+
+ if (child->priv->offset != offset)
+ {
+ child->priv->offset = offset;
+
+ g_object_notify (G_OBJECT (child), "offset");
+ }
+}
+
+/**
+ * gedit_overlay_child_get_fixed:
+ * @child: a #GeditOverlayChild
+ *
+ * Gets wether @child is fixed in its position. If @child is not fixed the position
+ * will change when for example you scroll the container.
+ *
+ * Returns: wether @child is fixed in its position
+ */
+gboolean
+gedit_overlay_child_get_fixed (GeditOverlayChild *child)
+{
+ g_return_val_if_fail (GEDIT_IS_OVERLAY_CHILD (child), TRUE);
+
+ return child->priv->fixed;
+}
+
+/**
+ * gedit_overlay_child_set_fixed:
+ * @child: a #GeditOverlayChild
+ * @fixed: wether @child is in a fixed position
+ *
+ * Sets wether @child is in a fixed position
+ */
+void
+gedit_overlay_child_set_fixed (GeditOverlayChild *child,
+ gboolean fixed)
+{
+ g_return_if_fail (GEDIT_IS_OVERLAY_CHILD (child));
+
+ fixed = (fixed != FALSE);
+
+ if (child->priv->fixed != fixed)
+ {
+ child->priv->fixed = fixed;
+
+ g_object_notify (G_OBJECT (child), "fixed");
+ }
+}
+
+/* ex:set ts=8 noet: */
diff --git a/src/gedit-overlay-child.h b/src/gedit-overlay-child.h
new file mode 100644
index 0000000..86e051b
--- /dev/null
+++ b/src/gedit-overlay-child.h
@@ -0,0 +1,89 @@
+/*
+ * gedit-overlay-child.h
+ * This file is part of gedit
+ *
+ * Copyright (C) 2011 - Ignacio Casal Quinteiro
+ *
+ * gedit 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 2.1 of the License, or (at your option) any later version.
+ *
+ * gedit 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __GEDIT_OVERLAY_CHILD_H__
+#define __GEDIT_OVERLAY_CHILD_H__
+
+#include <glib-object.h>
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GEDIT_TYPE_OVERLAY_CHILD (gedit_overlay_child_get_type ())
+#define GEDIT_OVERLAY_CHILD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEDIT_TYPE_OVERLAY_CHILD, GeditOverlayChild))
+#define GEDIT_OVERLAY_CHILD_CONST(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEDIT_TYPE_OVERLAY_CHILD, GeditOverlayChild const))
+#define GEDIT_OVERLAY_CHILD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GEDIT_TYPE_OVERLAY_CHILD, GeditOverlayChildClass))
+#define GEDIT_IS_OVERLAY_CHILD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GEDIT_TYPE_OVERLAY_CHILD))
+#define GEDIT_IS_OVERLAY_CHILD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GEDIT_TYPE_OVERLAY_CHILD))
+#define GEDIT_OVERLAY_CHILD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GEDIT_TYPE_OVERLAY_CHILD, GeditOverlayChildClass))
+
+typedef struct _GeditOverlayChild GeditOverlayChild;
+typedef struct _GeditOverlayChildClass GeditOverlayChildClass;
+typedef struct _GeditOverlayChildPrivate GeditOverlayChildPrivate;
+
+struct _GeditOverlayChild
+{
+ GtkBin parent;
+
+ GeditOverlayChildPrivate *priv;
+};
+
+struct _GeditOverlayChildClass
+{
+ GtkBinClass parent_class;
+};
+
+typedef enum
+{
+ GEDIT_OVERLAY_CHILD_POSITION_NORTH_WEST = 1,
+ GEDIT_OVERLAY_CHILD_POSITION_NORTH,
+ GEDIT_OVERLAY_CHILD_POSITION_NORTH_EAST,
+ GEDIT_OVERLAY_CHILD_POSITION_WEST,
+ GEDIT_OVERLAY_CHILD_POSITION_CENTER,
+ GEDIT_OVERLAY_CHILD_POSITION_EAST,
+ GEDIT_OVERLAY_CHILD_POSITION_SOUTH_WEST,
+ GEDIT_OVERLAY_CHILD_POSITION_SOUTH,
+ GEDIT_OVERLAY_CHILD_POSITION_SOUTH_EAST,
+ GEDIT_OVERLAY_CHILD_POSITION_STATIC
+} GeditOverlayChildPosition;
+
+GType gedit_overlay_child_get_type (void) G_GNUC_CONST;
+
+GeditOverlayChild *gedit_overlay_child_new (GtkWidget *widget);
+
+GeditOverlayChildPosition gedit_overlay_child_get_position (GeditOverlayChild *child);
+
+void gedit_overlay_child_set_position (GeditOverlayChild *child,
+ GeditOverlayChildPosition position);
+
+guint gedit_overlay_child_get_offset (GeditOverlayChild *child);
+
+void gedit_overlay_child_set_offset (GeditOverlayChild *child,
+ guint offset);
+
+gboolean gedit_overlay_child_get_fixed (GeditOverlayChild *child);
+
+void gedit_overlay_child_set_fixed (GeditOverlayChild *child,
+ gboolean fixed);
+
+G_END_DECLS
+
+#endif /* __GEDIT_OVERLAY_CHILD_H__ */
diff --git a/src/gedit-overlay.c b/src/gedit-overlay.c
new file mode 100644
index 0000000..6a9e3e6
--- /dev/null
+++ b/src/gedit-overlay.c
@@ -0,0 +1,687 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/*
+ * gedit-overlay.c
+ * This file is part of gedit
+ *
+ * Copyright (C) 2011 - Ignacio Casal Quinteiro
+ *
+ * Based on Mike Krüger <mkrueger novell com> work.
+ *
+ * gedit 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 2.1 of the License, or (at your option) any later version.
+ *
+ * gedit 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "gedit-overlay.h"
+#include "gedit-overlay-child.h"
+
+#define GEDIT_OVERLAY_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object), GEDIT_TYPE_OVERLAY, GeditOverlayPrivate))
+
+struct _GeditOverlayPrivate
+{
+ GtkWidget *main_widget;
+ GSList *children;
+ GtkAllocation main_alloc;
+
+ GtkAdjustment *hadjustment;
+ GtkAdjustment *vadjustment;
+ glong hadjustment_signal_id;
+ glong vadjustment_signal_id;
+
+ /* GtkScrollablePolicy needs to be checked when
+ * driving the scrollable adjustment values */
+ guint hscroll_policy : 1;
+ guint vscroll_policy : 1;
+};
+
+enum
+{
+ PROP_0,
+ PROP_MAIN_WIDGET,
+ PROP_HADJUSTMENT,
+ PROP_VADJUSTMENT,
+ PROP_HSCROLL_POLICY,
+ PROP_VSCROLL_POLICY
+};
+
+static void gedit_overlay_set_hadjustment (GeditOverlay *overlay,
+ GtkAdjustment *adjustment);
+static void gedit_overlay_set_vadjustment (GeditOverlay *overlay,
+ GtkAdjustment *adjustment);
+
+G_DEFINE_TYPE_WITH_CODE (GeditOverlay, gedit_overlay, GTK_TYPE_CONTAINER,
+ G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
+
+static void
+add_toplevel_widget (GeditOverlay *overlay,
+ GtkWidget *child)
+{
+ gtk_widget_set_parent (child, GTK_WIDGET (overlay));
+
+ overlay->priv->children = g_slist_append (overlay->priv->children,
+ child);
+}
+
+static void
+gedit_overlay_finalize (GObject *object)
+{
+ GeditOverlay *overlay = GEDIT_OVERLAY (object);
+
+ g_slist_free (overlay->priv->children);
+ overlay->priv->children = NULL;
+
+ G_OBJECT_CLASS (gedit_overlay_parent_class)->finalize (object);
+}
+
+static void
+gedit_overlay_dispose (GObject *object)
+{
+ GeditOverlay *overlay = GEDIT_OVERLAY (object);
+
+ if (overlay->priv->hadjustment != NULL)
+ {
+ g_signal_handler_disconnect (overlay->priv->hadjustment,
+ overlay->priv->hadjustment_signal_id);
+ overlay->priv->hadjustment = NULL;
+ }
+
+ if (overlay->priv->vadjustment != NULL)
+ {
+ g_signal_handler_disconnect (overlay->priv->vadjustment,
+ overlay->priv->vadjustment_signal_id);
+ overlay->priv->vadjustment = NULL;
+ }
+
+ G_OBJECT_CLASS (gedit_overlay_parent_class)->dispose (object);
+}
+
+static void
+gedit_overlay_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GeditOverlay *overlay = GEDIT_OVERLAY (object);
+ GeditOverlayPrivate *priv = overlay->priv;
+
+ switch (prop_id)
+ {
+ case PROP_MAIN_WIDGET:
+ g_value_set_object (value, priv->main_widget);
+ break;
+
+ case PROP_HADJUSTMENT:
+ g_value_set_object (value, priv->hadjustment);
+ break;
+
+ case PROP_VADJUSTMENT:
+ g_value_set_object (value, priv->vadjustment);
+ break;
+
+ case PROP_HSCROLL_POLICY:
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ g_value_set_enum (value,
+ gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (priv->main_widget)));
+ }
+ else
+ {
+ g_value_set_enum (value, priv->hscroll_policy);
+ }
+ break;
+
+ case PROP_VSCROLL_POLICY:
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ g_value_set_enum (value,
+ gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (priv->main_widget)));
+ }
+ else
+ {
+ g_value_set_enum (value, priv->vscroll_policy);
+ }
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gedit_overlay_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GeditOverlay *overlay = GEDIT_OVERLAY (object);
+ GeditOverlayPrivate *priv = overlay->priv;
+
+ switch (prop_id)
+ {
+ case PROP_MAIN_WIDGET:
+ overlay->priv->main_widget = g_value_get_object (value);
+ add_toplevel_widget (overlay,
+ overlay->priv->main_widget);
+ break;
+
+ case PROP_HADJUSTMENT:
+ gedit_overlay_set_hadjustment (overlay,
+ g_value_get_object (value));
+ break;
+
+ case PROP_VADJUSTMENT:
+ gedit_overlay_set_vadjustment (overlay,
+ g_value_get_object (value));
+ break;
+
+ case PROP_HSCROLL_POLICY:
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ gtk_scrollable_set_hscroll_policy (GTK_SCROLLABLE (priv->main_widget),
+ g_value_get_uint (value));
+ }
+ else
+ {
+ priv->hscroll_policy = g_value_get_enum (value);
+ gtk_widget_queue_resize (GTK_WIDGET (overlay));
+ }
+ break;
+
+ case PROP_VSCROLL_POLICY:
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ gtk_scrollable_set_vscroll_policy (GTK_SCROLLABLE (priv->main_widget),
+ g_value_get_enum (value));
+ }
+ else
+ {
+ priv->vscroll_policy = g_value_get_enum (value);
+ gtk_widget_queue_resize (GTK_WIDGET (overlay));
+ }
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gedit_overlay_realize (GtkWidget *widget)
+{
+ GtkAllocation allocation;
+ GdkWindow *window;
+ GdkWindowAttr attributes;
+ gint attributes_mask;
+ GtkStyleContext *context;
+
+ gtk_widget_set_realized (widget, TRUE);
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ attributes.window_type = GDK_WINDOW_CHILD;
+ attributes.x = allocation.x;
+ attributes.y = allocation.y;
+ attributes.width = allocation.width;
+ attributes.height = allocation.height;
+ attributes.wclass = GDK_INPUT_OUTPUT;
+ attributes.visual = gtk_widget_get_visual (widget);
+ attributes.event_mask = gtk_widget_get_events (widget);
+ attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
+
+ attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+
+ window = gdk_window_new (gtk_widget_get_parent_window (widget),
+ &attributes, attributes_mask);
+ gtk_widget_set_window (widget, window);
+ gdk_window_set_user_data (window, widget);
+
+ context = gtk_widget_get_style_context (widget);
+ gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
+ gtk_style_context_set_background (context, window);
+}
+
+static void
+gedit_overlay_get_preferred_width (GtkWidget *widget,
+ gint *minimum,
+ gint *natural)
+{
+ GeditOverlayPrivate *priv = GEDIT_OVERLAY (widget)->priv;
+ GtkWidget *child;
+ GSList *children;
+ gint child_min, child_nat;
+
+ *minimum = 0;
+ *natural = 0;
+
+ for (children = priv->children; children; children = children->next)
+ {
+ child = children->data;
+
+ if (!gtk_widget_get_visible (child))
+ continue;
+
+ gtk_widget_get_preferred_width (child, &child_min, &child_nat);
+
+ *minimum = MAX (*minimum, child_min);
+ *natural = MAX (*natural, child_nat);
+ }
+}
+
+static void
+gedit_overlay_get_preferred_height (GtkWidget *widget,
+ gint *minimum,
+ gint *natural)
+{
+ GeditOverlayPrivate *priv = GEDIT_OVERLAY (widget)->priv;
+ GtkWidget *child;
+ GSList *children;
+ gint child_min, child_nat;
+
+ *minimum = 0;
+ *natural = 0;
+
+ for (children = priv->children; children; children = children->next)
+ {
+ child = children->data;
+
+ if (!gtk_widget_get_visible (child))
+ continue;
+
+ gtk_widget_get_preferred_height (child, &child_min, &child_nat);
+
+ *minimum = MAX (*minimum, child_min);
+ *natural = MAX (*natural, child_nat);
+ }
+}
+
+static void
+set_children_positions (GeditOverlay *overlay)
+{
+ GSList *l;
+
+ for (l = overlay->priv->children; l != NULL; l = g_slist_next (l))
+ {
+ GeditOverlayPrivate *priv = overlay->priv;
+ GtkWidget *child = GTK_WIDGET (l->data);
+ GtkRequisition req;
+ GtkAllocation alloc;
+ guint offset;
+
+ if (child == priv->main_widget)
+ continue;
+
+ gtk_widget_get_preferred_size (child, &req, NULL);
+ offset = gedit_overlay_child_get_offset (GEDIT_OVERLAY_CHILD (child));
+
+ switch (gedit_overlay_child_get_position (GEDIT_OVERLAY_CHILD (child)))
+ {
+ /* The gravity is treated as position and not as a gravity */
+ case GEDIT_OVERLAY_CHILD_POSITION_NORTH_EAST:
+ alloc.x = priv->main_alloc.width - req.width - offset;
+ alloc.y = 0;
+ break;
+ case GEDIT_OVERLAY_CHILD_POSITION_NORTH_WEST:
+ alloc.x = offset;
+ alloc.y = 0;
+ break;
+ case GEDIT_OVERLAY_CHILD_POSITION_SOUTH_WEST:
+ alloc.x = offset;
+ alloc.y = priv->main_alloc.height - req.height;
+ break;
+ case GEDIT_OVERLAY_CHILD_POSITION_SOUTH_EAST:
+ alloc.x = priv->main_alloc.width - req.width - offset;
+ alloc.y = priv->main_alloc.height - req.height;
+ break;
+ default:
+ alloc.x = 0;
+ alloc.y = 0;
+ }
+
+ if (!gedit_overlay_child_get_fixed (GEDIT_OVERLAY_CHILD (child)))
+ {
+ alloc.x *= gtk_adjustment_get_value (priv->hadjustment);
+ alloc.y *= gtk_adjustment_get_value (priv->vadjustment);
+ }
+
+ alloc.width = req.width;
+ alloc.height = req.height;
+
+ gtk_widget_size_allocate (child, &alloc);
+ }
+}
+
+static void
+gedit_overlay_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GeditOverlay *overlay = GEDIT_OVERLAY (widget);
+
+ GTK_WIDGET_CLASS (gedit_overlay_parent_class)->size_allocate (widget, allocation);
+
+ overlay->priv->main_alloc.x = 0;
+ overlay->priv->main_alloc.y = 0;
+ overlay->priv->main_alloc.width = allocation->width;
+ overlay->priv->main_alloc.height = allocation->height;
+
+ gtk_widget_size_allocate (overlay->priv->main_widget,
+ &overlay->priv->main_alloc);
+ set_children_positions (overlay);
+}
+
+static GeditOverlayChild *
+get_overlay_child (GeditOverlay *overlay,
+ GtkWidget *widget)
+{
+ GeditOverlayChild *overlay_child = NULL;
+ GSList *l;
+
+ for (l = overlay->priv->children; l != NULL; l = g_slist_next (l))
+ {
+ GtkWidget *child = GTK_WIDGET (l->data);
+
+ /* skip the main widget as it is not a OverlayChild */
+ if (child == overlay->priv->main_widget)
+ continue;
+
+ if (child == widget)
+ {
+ overlay_child = GEDIT_OVERLAY_CHILD (child);
+ break;
+ }
+ else
+ {
+ GtkWidget *in_widget;
+
+ /* let's try also with the internal widget */
+ g_object_get (child, "widget", &in_widget, NULL);
+ g_assert (in_widget != NULL);
+
+ if (in_widget == widget)
+ {
+ overlay_child = GEDIT_OVERLAY_CHILD (child);
+ break;
+ }
+ }
+ }
+
+ return overlay_child;
+}
+
+static void
+overlay_add (GtkContainer *overlay,
+ GtkWidget *widget)
+{
+ GeditOverlayChild *child;
+
+ /* check that the widget is not added yet */
+ child = get_overlay_child (GEDIT_OVERLAY (overlay), widget);
+
+ if (child == NULL)
+ {
+ if (GEDIT_IS_OVERLAY_CHILD (widget))
+ {
+ child = GEDIT_OVERLAY_CHILD (widget);
+ }
+ else
+ {
+ child = gedit_overlay_child_new (widget);
+ gtk_widget_show (GTK_WIDGET (child));
+ }
+
+ add_toplevel_widget (GEDIT_OVERLAY (overlay), GTK_WIDGET (child));
+ }
+}
+
+static void
+gedit_overlay_remove (GtkContainer *overlay,
+ GtkWidget *widget)
+{
+ GeditOverlayPrivate *priv = GEDIT_OVERLAY (overlay)->priv;
+ GSList *l;
+
+ for (l = priv->children; l != NULL; l = g_slist_next (l))
+ {
+ GtkWidget *child = l->data;
+
+ if (child == widget)
+ {
+ gtk_widget_unparent (widget);
+ priv->children = g_slist_remove_link (priv->children,
+ l);
+
+ g_slist_free (l);
+ break;
+ }
+ }
+}
+
+static void
+gedit_overlay_forall (GtkContainer *overlay,
+ gboolean include_internals,
+ GtkCallback callback,
+ gpointer callback_data)
+{
+ GeditOverlay *goverlay = GEDIT_OVERLAY (overlay);
+ GSList *l, *next;
+
+ l = goverlay->priv->children;
+
+ while (l != NULL)
+ {
+ GtkWidget *child = GTK_WIDGET (l->data);
+
+ next = l->next;
+
+ (* callback) (child, callback_data);
+
+ l = next;
+ }
+}
+
+static GType
+gedit_overlay_child_type (GtkContainer *overlay)
+{
+ return GTK_TYPE_WIDGET;
+}
+
+static void
+adjustment_value_changed (GtkAdjustment *adjustment,
+ GeditOverlay *overlay)
+{
+ set_children_positions (overlay);
+}
+
+static void
+gedit_overlay_set_hadjustment (GeditOverlay *overlay,
+ GtkAdjustment *adjustment)
+{
+ GeditOverlayPrivate *priv = overlay->priv;
+
+ if (adjustment && priv->vadjustment == adjustment)
+ return;
+
+ if (priv->hadjustment != NULL)
+ {
+ g_signal_handler_disconnect (priv->hadjustment,
+ priv->hadjustment_signal_id);
+ g_object_unref (priv->hadjustment);
+ }
+
+ if (adjustment == NULL)
+ {
+ adjustment = gtk_adjustment_new (0.0, 0.0, 0.0,
+ 0.0, 0.0, 0.0);
+ }
+
+ priv->hadjustment_signal_id =
+ g_signal_connect (adjustment,
+ "value-changed",
+ G_CALLBACK (adjustment_value_changed),
+ overlay);
+
+ priv->hadjustment = g_object_ref_sink (adjustment);
+
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ g_object_set (priv->main_widget,
+ "hadjustment", adjustment,
+ NULL);
+
+ }
+
+ g_object_notify (G_OBJECT (overlay), "hadjustment");
+}
+
+static void
+gedit_overlay_set_vadjustment (GeditOverlay *overlay,
+ GtkAdjustment *adjustment)
+{
+ GeditOverlayPrivate *priv = overlay->priv;
+
+ if (adjustment && priv->vadjustment == adjustment)
+ return;
+
+ if (priv->vadjustment != NULL)
+ {
+ g_signal_handler_disconnect (priv->vadjustment,
+ priv->vadjustment_signal_id);
+ g_object_unref (priv->vadjustment);
+ }
+
+ if (adjustment == NULL)
+ {
+ adjustment = gtk_adjustment_new (0.0, 0.0, 0.0,
+ 0.0, 0.0, 0.0);
+ }
+
+ overlay->priv->vadjustment_signal_id =
+ g_signal_connect (adjustment,
+ "value-changed",
+ G_CALLBACK (adjustment_value_changed),
+ overlay);
+
+ priv->vadjustment = g_object_ref_sink (adjustment);
+
+ if (GTK_IS_SCROLLABLE (priv->main_widget))
+ {
+ g_object_set (priv->main_widget,
+ "vadjustment", adjustment,
+ NULL);
+ }
+
+ g_object_notify (G_OBJECT (overlay), "vadjustment");
+}
+
+static void
+gedit_overlay_class_init (GeditOverlayClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+ GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+
+ object_class->finalize = gedit_overlay_finalize;
+ object_class->dispose = gedit_overlay_dispose;
+ object_class->get_property = gedit_overlay_get_property;
+ object_class->set_property = gedit_overlay_set_property;
+
+ widget_class->realize = gedit_overlay_realize;
+ widget_class->get_preferred_width = gedit_overlay_get_preferred_width;
+ widget_class->get_preferred_height = gedit_overlay_get_preferred_height;
+ widget_class->size_allocate = gedit_overlay_size_allocate;
+
+ container_class->add = overlay_add;
+ container_class->remove = gedit_overlay_remove;
+ container_class->forall = gedit_overlay_forall;
+ container_class->child_type = gedit_overlay_child_type;
+
+ g_object_class_install_property (object_class, PROP_MAIN_WIDGET,
+ g_param_spec_object ("main-widget",
+ "Main Widget",
+ "The Main Widget",
+ GTK_TYPE_WIDGET,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY |
+ G_PARAM_STATIC_STRINGS));
+
+ g_object_class_override_property (object_class,
+ PROP_HADJUSTMENT,
+ "hadjustment");
+ g_object_class_override_property (object_class,
+ PROP_VADJUSTMENT,
+ "vadjustment");
+ g_object_class_override_property (object_class,
+ PROP_HSCROLL_POLICY,
+ "hscroll-policy");
+ g_object_class_override_property (object_class,
+ PROP_VSCROLL_POLICY,
+ "vscroll-policy");
+
+ g_type_class_add_private (object_class, sizeof (GeditOverlayPrivate));
+}
+
+static void
+gedit_overlay_init (GeditOverlay *overlay)
+{
+ overlay->priv = GEDIT_OVERLAY_GET_PRIVATE (overlay);
+ overlay->priv->children = NULL;
+}
+
+/**
+ * gedit_overlay_new:
+ * @main_widget: a #GtkWidget
+ *
+ * Creates a new #GeditOverlay
+ *
+ * Returns: a new #GeditOverlay object.
+ */
+GtkWidget *
+gedit_overlay_new (GtkWidget *main_widget)
+{
+ g_return_val_if_fail (GTK_IS_WIDGET (main_widget), NULL);
+
+ return GTK_WIDGET (g_object_new (GEDIT_TYPE_OVERLAY,
+ "main-widget", main_widget,
+ NULL));
+}
+
+/**
+ * gedit_overlay_add:
+ * @overlay: a #GeditOverlay
+ * @widget: a #GtkWidget to be added to the container
+ * @position: a #GeditOverlayChildPosition
+ * @offset: offset for @widget
+ *
+ * Adds @widget to @overlay in a specific position.
+ */
+void
+gedit_overlay_add (GeditOverlay *overlay,
+ GtkWidget *widget,
+ GeditOverlayChildPosition position,
+ guint offset)
+{
+ GeditOverlayChild *child;
+
+ g_return_if_fail (GEDIT_IS_OVERLAY (overlay));
+ g_return_if_fail (GTK_IS_WIDGET (widget));
+
+ gtk_container_add (GTK_CONTAINER (overlay), widget);
+
+ /* NOTE: can we improve this without exposing overlay child? */
+ child = get_overlay_child (overlay, widget);
+ g_assert (child != NULL);
+
+ gedit_overlay_child_set_position (child, position);
+ gedit_overlay_child_set_offset (child, offset);
+}
diff --git a/src/gedit-overlay.h b/src/gedit-overlay.h
new file mode 100644
index 0000000..8817d33
--- /dev/null
+++ b/src/gedit-overlay.h
@@ -0,0 +1,70 @@
+/*
+ * gedit-overlay.h
+ * This file is part of gedit
+ *
+ * Copyright (C) 2011 - Ignacio Casal Quinteiro
+ *
+ * gedit 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 2.1 of the License, or (at your option) any later version.
+ *
+ * gedit 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __GEDIT_OVERLAY_H__
+#define __GEDIT_OVERLAY_H__
+
+#include <glib-object.h>
+#include <gtk/gtk.h>
+#include "gedit-overlay-child.h"
+
+G_BEGIN_DECLS
+
+#define GEDIT_TYPE_OVERLAY (gedit_overlay_get_type ())
+#define GEDIT_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEDIT_TYPE_OVERLAY, GeditOverlay))
+#define GEDIT_OVERLAY_CONST(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEDIT_TYPE_OVERLAY, GeditOverlay const))
+#define GEDIT_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GEDIT_TYPE_OVERLAY, GeditOverlayClass))
+#define GEDIT_IS_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GEDIT_TYPE_OVERLAY))
+#define GEDIT_IS_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GEDIT_TYPE_OVERLAY))
+#define GEDIT_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GEDIT_TYPE_OVERLAY, GeditOverlayClass))
+
+typedef struct _GeditOverlay GeditOverlay;
+typedef struct _GeditOverlayClass GeditOverlayClass;
+typedef struct _GeditOverlayPrivate GeditOverlayPrivate;
+
+struct _GeditOverlay
+{
+ GtkContainer parent;
+
+ GeditOverlayPrivate *priv;
+};
+
+struct _GeditOverlayClass
+{
+ GtkContainerClass parent_class;
+
+ void (* set_scroll_adjustments) (GeditOverlay *overlay,
+ GtkAdjustment *hadjustment,
+ GtkAdjustment *vadjustment);
+};
+
+GType gedit_overlay_get_type (void) G_GNUC_CONST;
+
+GtkWidget *gedit_overlay_new (GtkWidget *main_widget);
+
+void gedit_overlay_add (GeditOverlay *overlay,
+ GtkWidget *widget,
+ GeditOverlayChildPosition position,
+ guint offset);
+
+G_END_DECLS
+
+#endif /* __GEDIT_OVERLAY_H__ */
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