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gtk2/gtk/gtkheaderbar.c
Matthias Clasen 3731a2bd90 GtkHeaderBar: Add subtitle support 
As seen in GdHeaderBar.
2013-03-19 22:07:26 -04:00

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/*
* Copyright (c) 2013 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "gtkheaderbar.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkcontainerprivate.h"
#include "a11y/gtkcontaineraccessible.h"
#include <string.h>
/**
* SECTION:gtkheaderbar
* @Short_description: A box with a centered child
* @Title: GtkHeaderBar
* @See_also: #GtkBox
*
* GtkHeaderBar is similar to a horizontal #GtkBox, it allows
* to place children at the start or the end. In addition,
* it allows a title to be displayed. The title will be
* centered wrt to the widget of the box, even if the children
* at either side take up different amounts of space.
*/
#define DEFAULT_SPACING 6
#define DEFAULT_HPADDING 6
#define DEFAULT_VPADDING 6
struct _GtkHeaderBarPrivate
{
gchar *title;
gchar *subtitle;
GtkWidget *title_label;
GtkWidget *subtitle_label;
GtkWidget *label_box;
GtkWidget *label_sizing_box;
GtkWidget *custom_title;
gint spacing;
gint hpadding;
gint vpadding;
GList *children;
};
typedef struct _Child Child;
struct _Child
{
GtkWidget *widget;
GtkPackType pack_type;
};
enum {
PROP_0,
PROP_TITLE,
PROP_SUBTITLE,
PROP_CUSTOM_TITLE,
PROP_SPACING,
PROP_HPADDING,
PROP_VPADDING
};
enum {
CHILD_PROP_0,
CHILD_PROP_PACK_TYPE,
CHILD_PROP_POSITION
};
static void gtk_header_buildable_init (GtkBuildableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkHeaderBar, gtk_header_bar, GTK_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_header_buildable_init));
static void
boldify_label (GtkWidget *label)
{
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
}
static void
smallify_label (GtkWidget *label)
{
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
gtk_style_context_add_class (gtk_widget_get_style_context (label), "dim-label");
}
static void
get_css_padding_and_border (GtkWidget *widget,
GtkBorder *border)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder tmp;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, border);
gtk_style_context_get_border (context, state, &tmp);
border->top += tmp.top;
border->right += tmp.right;
border->bottom += tmp.bottom;
border->left += tmp.left;
}
static void
init_sizing_box (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = bar->priv;
GtkWidget *w;
/* We use this box to always request size for the two labels (title
* and subtitle) as if they were always visible, but then allocate
* the real label box with its actual size, to keep it center-aligned
* in case we have only the title.
*/
priv->label_sizing_box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
w = gtk_label_new (NULL);
boldify_label (w);
gtk_box_pack_start (GTK_BOX (priv->label_sizing_box), w, FALSE, FALSE, 0);
gtk_label_set_line_wrap (GTK_LABEL (w), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (w), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (w), PANGO_ELLIPSIZE_END);
w = gtk_label_new (NULL);
smallify_label (w);
gtk_box_pack_start (GTK_BOX (priv->label_sizing_box), w, FALSE, FALSE, 0);
gtk_label_set_line_wrap (GTK_LABEL (w), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (w), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (w), PANGO_ELLIPSIZE_END);
gtk_widget_show_all (priv->label_sizing_box);
}
static void
construct_label_box (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = bar->priv;
g_assert (priv->label_box == NULL);
priv->label_box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_parent (priv->label_box, GTK_WIDGET (bar));
gtk_widget_set_valign (priv->label_box, GTK_ALIGN_CENTER);
gtk_widget_show (priv->label_box);
priv->title_label = gtk_label_new (priv->title);
boldify_label (priv->title_label);
gtk_label_set_line_wrap (GTK_LABEL (priv->title_label), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (priv->title_label), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (priv->title_label), PANGO_ELLIPSIZE_END);
gtk_box_pack_start (GTK_BOX (priv->label_box), priv->title_label, FALSE, FALSE, 0);
gtk_widget_show (priv->title_label);
priv->subtitle_label = gtk_label_new (priv->subtitle);
smallify_label (priv->subtitle_label);
gtk_label_set_line_wrap (GTK_LABEL (priv->subtitle_label), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (priv->subtitle_label), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (priv->subtitle_label), PANGO_ELLIPSIZE_END);
gtk_box_pack_start (GTK_BOX (priv->label_box), priv->subtitle_label, FALSE, FALSE, 0);
}
static void
gtk_header_bar_init (GtkHeaderBar *bar)
{
GtkStyleContext *context;
GtkHeaderBarPrivate *priv;
priv = G_TYPE_INSTANCE_GET_PRIVATE (bar, GTK_TYPE_HEADER_BAR, GtkHeaderBarPrivate);
bar->priv = priv;
gtk_widget_set_has_window (GTK_WIDGET (bar), FALSE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (bar), FALSE);
priv->title = NULL;
priv->subtitle = NULL;
priv->custom_title = NULL;
priv->children = NULL;
priv->spacing = DEFAULT_SPACING;
priv->hpadding = DEFAULT_HPADDING;
priv->vpadding = DEFAULT_VPADDING;
init_sizing_box (bar);
construct_label_box (bar);
context = gtk_widget_get_style_context (GTK_WIDGET (bar));
gtk_style_context_add_class (context, "header-bar");
gtk_style_context_add_class (context, GTK_STYLE_CLASS_HORIZONTAL);
}
static gint
count_visible_children (GtkHeaderBar *bar)
{
GList *l;
Child *child;
gint n;
n = 0;
for (l = bar->priv->children; l; l = l->next)
{
child = l->data;
if (gtk_widget_get_visible (child->widget))
n++;
}
return n;
}
static gboolean
add_child_size (GtkWidget *child,
GtkOrientation orientation,
gint *minimum,
gint *natural)
{
gint child_minimum, child_natural;
if (!gtk_widget_get_visible (child))
return FALSE;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_width (child, &child_minimum, &child_natural);
else
gtk_widget_get_preferred_height (child, &child_minimum, &child_natural);
if (GTK_ORIENTATION_HORIZONTAL == orientation)
{
*minimum += child_minimum;
*natural += child_natural;
}
else
{
*minimum = MAX (*minimum, child_minimum);
*natural = MAX (*natural, child_natural);
}
return TRUE;
}
static void
gtk_header_bar_get_size (GtkWidget *widget,
GtkOrientation orientation,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = bar->priv;
GList *l;
gint nvis_children;
gint minimum, natural;
GtkBorder css_borders;
minimum = natural = 0;
nvis_children = 0;
for (l = priv->children; l; l = l->next)
{
Child *child = l->data;
if (add_child_size (child->widget, orientation, &minimum, &natural))
nvis_children += 1;
}
if (priv->label_box != NULL)
{
if (add_child_size (priv->label_sizing_box, orientation, &minimum, &natural))
nvis_children += 1;
}
if (priv->custom_title != NULL)
{
if (add_child_size (priv->custom_title, orientation, &minimum, &natural))
nvis_children += 1;
}
if (nvis_children > 0 && orientation == GTK_ORIENTATION_HORIZONTAL)
{
minimum += nvis_children * priv->spacing;
natural += nvis_children * priv->spacing;
}
get_css_padding_and_border (widget, &css_borders);
if (GTK_ORIENTATION_HORIZONTAL == orientation)
{
minimum += 2 * priv->hpadding + css_borders.left + css_borders.right;
natural += 2 * priv->hpadding + css_borders.left + css_borders.right;
}
else
{
minimum += 2 * priv->vpadding + css_borders.top + css_borders.bottom;
natural += 2 * priv->vpadding + css_borders.top + css_borders.bottom;
}
if (minimum_size)
*minimum_size = minimum;
if (natural_size)
*natural_size = natural;
}
static void
gtk_header_bar_compute_size_for_orientation (GtkWidget *widget,
gint avail_size,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = bar->priv;
GList *children;
gint required_size = 0;
gint required_natural = 0;
gint child_size;
gint child_natural;
gint nvis_children;
GtkBorder css_borders;
avail_size -= 2 * priv->vpadding;
nvis_children = 0;
for (children = priv->children; children != NULL; children = children->next)
{
Child *child = children->data;
if (gtk_widget_get_visible (child->widget))
{
gtk_widget_get_preferred_width_for_height (child->widget,
avail_size, &child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
}
if (priv->label_box != NULL &&
gtk_widget_get_visible (priv->label_box))
{
gtk_widget_get_preferred_width (priv->label_sizing_box,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_get_preferred_width (priv->custom_title,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
}
if (nvis_children > 0)
{
required_size += nvis_children * priv->spacing;
required_natural += nvis_children * priv->spacing;
}
get_css_padding_and_border (widget, &css_borders);
required_size += 2 * priv->hpadding + css_borders.left + css_borders.right;
required_natural += 2 * priv->hpadding + css_borders.left + css_borders.right;
if (minimum_size)
*minimum_size = required_size;
if (natural_size)
*natural_size = required_natural;
}
static void
gtk_header_bar_compute_size_for_opposing_orientation (GtkWidget *widget,
gint avail_size,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = bar->priv;
Child *child;
GList *children;
gint nvis_children;
gint computed_minimum = 0;
gint computed_natural = 0;
GtkRequestedSize *sizes;
GtkPackType packing;
gint size;
gint i;
gint child_size;
gint child_minimum;
gint child_natural;
GtkBorder css_borders;
nvis_children = count_visible_children (bar);
if (nvis_children <= 0)
return;
sizes = g_newa (GtkRequestedSize, nvis_children);
size = avail_size - 2 * priv->hpadding;
/* Retrieve desired size for visible children */
for (i = 0, children = priv->children; children; children = children->next)
{
child = children->data;
if (gtk_widget_get_visible (child->widget))
{
gtk_widget_get_preferred_width (child->widget,
&sizes[i].minimum_size,
&sizes[i].natural_size);
size -= sizes[i].minimum_size;
sizes[i].data = child;
i += 1;
}
}
/* Bring children up to size first */
size = gtk_distribute_natural_allocation (MAX (0, size), nvis_children, sizes);
/* Allocate child positions. */
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; ++packing)
{
for (i = 0, children = priv->children; children; children = children->next)
{
child = children->data;
/* If widget is not visible, skip it. */
if (!gtk_widget_get_visible (child->widget))
continue;
/* If widget is packed differently skip it, but still increment i,
* since widget is visible and will be handled in next loop
* iteration.
*/
if (child->pack_type != packing)
{
i++;
continue;
}
child_size = sizes[i].minimum_size;
gtk_widget_get_preferred_height_for_width (child->widget,
child_size, &child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
i += 1;
}
if (priv->label_box != NULL &&
gtk_widget_get_visible (priv->label_box))
{
gtk_widget_get_preferred_height (priv->label_sizing_box,
&child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_get_preferred_height (priv->custom_title,
&child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
get_css_padding_and_border (widget, &css_borders);
computed_minimum += 2 * priv->vpadding + css_borders.top + css_borders.bottom;
computed_natural += 2 * priv->vpadding + css_borders.top + css_borders.bottom;
if (minimum_size)
*minimum_size = computed_minimum;
if (natural_size)
*natural_size = computed_natural;
}
static void
gtk_header_bar_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_header_bar_get_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
}
static void
gtk_header_bar_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_header_bar_get_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
}
static void
gtk_header_bar_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
gtk_header_bar_compute_size_for_orientation (widget, height, minimum_width, natural_width);
}
static void
gtk_header_bar_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
gtk_header_bar_compute_size_for_opposing_orientation (widget, width, minimum_height, natural_height);
}
static void
gtk_header_bar_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = bar->priv;
GtkRequestedSize *sizes;
gint width, height;
gint nvis_children;
gint title_minimum_size;
gint title_natural_size;
gint side[2];
GList *l;
gint i;
Child *child;
GtkPackType packing;
GtkAllocation child_allocation;
gint x;
gint child_size;
GtkTextDirection direction;
GtkBorder css_borders;
gtk_widget_set_allocation (widget, allocation);
direction = gtk_widget_get_direction (widget);
nvis_children = count_visible_children (bar);
sizes = g_newa (GtkRequestedSize, nvis_children);
get_css_padding_and_border (widget, &css_borders);
width = allocation->width - nvis_children * priv->spacing -
2 * priv->hpadding - css_borders.left - css_borders.right;
height = allocation->height - 2 * priv->vpadding - css_borders.top - css_borders.bottom;
i = 0;
for (l = priv->children; l; l = l->next)
{
child = l->data;
if (!gtk_widget_get_visible (child->widget))
continue;
gtk_widget_get_preferred_width_for_height (child->widget,
height,
&sizes[i].minimum_size,
&sizes[i].natural_size);
width -= sizes[i].minimum_size;
i++;
}
if (priv->custom_title)
{
gtk_widget_get_preferred_width_for_height (priv->custom_title,
height,
&title_minimum_size,
&title_natural_size);
}
else
{
gtk_widget_get_preferred_width_for_height (priv->label_box,
height,
&title_minimum_size,
&title_natural_size);
}
width -= title_natural_size;
width = gtk_distribute_natural_allocation (MAX (0, width), nvis_children, sizes);
side[0] = side[1] = 0;
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; packing++)
{
child_allocation.y = allocation->y + priv->vpadding + css_borders.top;
child_allocation.height = height;
if (packing == GTK_PACK_START)
x = allocation->x + priv->hpadding + css_borders.left;
else
x = allocation->x + allocation->width - priv->hpadding - css_borders.right;
if (packing == GTK_PACK_START)
{
l = priv->children;
i = 0;
}
else
{
l = g_list_last (priv->children);
i = nvis_children - 1;
}
for (; l != NULL; (packing == GTK_PACK_START) ? (l = l->next) : (l = l->prev))
{
child = l->data;
if (!gtk_widget_get_visible (child->widget))
continue;
if (child->pack_type != packing)
goto next;
child_size = sizes[i].minimum_size;
child_allocation.width = child_size;
if (packing == GTK_PACK_START)
{
child_allocation.x = x;
x += child_size;
x += priv->spacing;
}
else
{
x -= child_size;
child_allocation.x = x;
x -= priv->spacing;
}
side[packing] += child_size + priv->spacing;
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
gtk_widget_size_allocate (child->widget, &child_allocation);
next:
if (packing == GTK_PACK_START)
i++;
else
i--;
}
}
child_allocation.y = allocation->y + priv->vpadding + css_borders.top;
child_allocation.height = height;
width = MAX (side[0], side[1]);
if (allocation->width - 2 * width >= title_natural_size)
child_size = MIN (title_natural_size, allocation->width - 2 * width);
else if (allocation->width - side[0] - side[1] >= title_natural_size)
child_size = MIN (title_natural_size, allocation->width - side[0] - side[1]);
else
child_size = allocation->width - side[0] - side[1];
child_allocation.x = allocation->x + (allocation->width - child_size) / 2;
child_allocation.width = child_size;
if (allocation->x + side[0] > child_allocation.x)
child_allocation.x = allocation->x + side[0];
else if (allocation->x + allocation->width - side[1] < child_allocation.x + child_allocation.width)
child_allocation.x = allocation->x + allocation->width - side[1] - child_allocation.width;
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
if (priv->custom_title)
gtk_widget_size_allocate (priv->custom_title, &child_allocation);
else
gtk_widget_size_allocate (priv->label_box, &child_allocation);
}
/**
* gtk_header_bar_set_title:
* @bar: a #GtkHeaderBar
* @title: (allow-none): a title
*
* Sets the title of the #GtkHeaderBar. The title should help a user
* identify the current view. A good title should not include the
* application name.
*
* Since: 3.10
*/
void
gtk_header_bar_set_title (GtkHeaderBar *bar,
const gchar *title)
{
GtkHeaderBarPrivate *priv;
gchar *new_title;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
priv = bar->priv;
new_title = g_strdup (title);
g_free (priv->title);
priv->title = new_title;
if (priv->title_label != NULL)
{
gtk_label_set_label (GTK_LABEL (priv->title_label), priv->title);
gtk_widget_queue_resize (GTK_WIDGET (bar));
}
g_object_notify (G_OBJECT (bar), "title");
}
/**
* gtk_header_bar_get_title:
* @bar: a #GtkHeaderBar
*
* Retrieves the title of the header. See gtk_header_bar_set_title().
*
* Return value: the title of the header, or %NULL if none has
* been set explicitely. The returned string is owned by the widget
* and must not be modified or freed.
*
* Since: 3.10
*/
const gchar *
gtk_header_bar_get_title (GtkHeaderBar *bar)
{
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return bar->priv->title;
}
/**
* gtk_header_bar_set_subtitle:
* @bar: a #GtkHeaderBar
* @subtitle: (allow-none): a subtitle
*
* Sets the subtitle of the #GtkHeaderBar. The title should give a user
* an additional detail to help him identify the current view.
*
* Since: 3.10
*/
void
gtk_header_bar_set_subtitle (GtkHeaderBar *bar,
const gchar *subtitle)
{
GtkHeaderBarPrivate *priv;
gchar *new_subtitle;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
priv = bar->priv;
new_subtitle = g_strdup (subtitle);
g_free (priv->subtitle);
priv->subtitle = new_subtitle;
if (priv->subtitle_label != NULL)
{
gtk_label_set_label (GTK_LABEL (priv->subtitle_label), priv->subtitle);
gtk_widget_set_visible (priv->subtitle_label, priv->subtitle != NULL);
gtk_widget_queue_resize (GTK_WIDGET (bar));
}
g_object_notify (G_OBJECT (bar), "subtitle");
}
/**
* gtk_header_bar_get_subtitle:
* @bar: a #GtkHeaderBar
*
* Retrieves the subtitle of the header. See gtk_header_bar_set_subtitle().
*
* Return value: the subtitle of the header, or %NULL if none has
* been set explicitely. The returned string is owned by the widget
* and must not be modified or freed.
*
* Since: 3.10
*/
const gchar *
gtk_header_bar_get_subtitle (GtkHeaderBar *bar)
{
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return bar->priv->subtitle;
}
/**
* gtk_header_bar_set_custom_title:
* @bar: a #GtkHeaderBar
* @title_widget: (allow-none): a custom widget to use for a title
*
* Sets a custom title for the #GtkHeaderBar. The title should help a
* user identify the current view. This supercedes any title set by
* gtk_header_bar_set_title(). You should set the custom title to %NULL,
* for the header title label to be visible again.
*
* Since: 3.10
*/
void
gtk_header_bar_set_custom_title (GtkHeaderBar *bar,
GtkWidget *title_widget)
{
GtkHeaderBarPrivate *priv;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
if (title_widget)
g_return_if_fail (GTK_IS_WIDGET (title_widget));
priv = bar->priv;
/* No need to do anything if the custom widget stays the same */
if (priv->custom_title == title_widget)
return;
if (priv->custom_title)
{
GtkWidget *custom = priv->custom_title;
priv->custom_title = NULL;
gtk_widget_unparent (custom);
}
if (title_widget != NULL)
{
priv->custom_title = title_widget;
gtk_widget_set_parent (priv->custom_title, GTK_WIDGET (bar));
gtk_widget_set_valign (priv->custom_title, GTK_ALIGN_CENTER);
gtk_widget_show (title_widget);
if (priv->label_box != NULL)
{
GtkWidget *label_box = priv->label_box;
priv->label_box = NULL;
priv->title_label = NULL;
priv->subtitle_label = NULL;
gtk_widget_unparent (label_box);
}
}
else
{
if (priv->label_box == NULL)
construct_label_box (bar);
}
gtk_widget_queue_resize (GTK_WIDGET (bar));
g_object_notify (G_OBJECT (bar), "custom-title");
}
/**
* gtk_header_bar_get_custom_title:
* @bar: a #GtkHeaderBar
*
* Retrieves the custom title widget of the header. See
* gtk_header_bar_set_custom_title().
*
* Return value: (transfer none): the custom title widget of the header, or %NULL if
* none has been set explicitely.
*
* Since: 3.10
*/
GtkWidget *
gtk_header_bar_get_custom_title (GtkHeaderBar *bar)
{
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return bar->priv->custom_title;
}
static void
gtk_header_bar_finalize (GObject *object)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (object);
g_free (bar->priv->title);
g_free (bar->priv->subtitle);
G_OBJECT_CLASS (gtk_header_bar_parent_class)->finalize (object);
}
static void
gtk_header_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (object);
GtkHeaderBarPrivate *priv = bar->priv;
switch (prop_id)
{
case PROP_TITLE:
g_value_set_string (value, priv->title);
break;
case PROP_SUBTITLE:
g_value_set_string (value, priv->subtitle);
break;
case PROP_CUSTOM_TITLE:
g_value_set_object (value, priv->custom_title);
break;
case PROP_SPACING:
g_value_set_int (value, priv->spacing);
break;
case PROP_HPADDING:
g_value_set_int (value, priv->hpadding);
break;
case PROP_VPADDING:
g_value_set_int (value, priv->vpadding);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_header_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (object);
GtkHeaderBarPrivate *priv = bar->priv;
switch (prop_id)
{
case PROP_TITLE:
gtk_header_bar_set_title (bar, g_value_get_string (value));
break;
case PROP_SUBTITLE:
gtk_header_bar_set_subtitle (bar, g_value_get_string (value));
break;
case PROP_CUSTOM_TITLE:
gtk_header_bar_set_custom_title (bar, g_value_get_object (value));
break;
case PROP_SPACING:
priv->spacing = g_value_get_int (value);
gtk_widget_queue_resize (GTK_WIDGET (bar));
break;
case PROP_HPADDING:
priv->hpadding = g_value_get_int (value);
gtk_widget_queue_resize (GTK_WIDGET (bar));
break;
case PROP_VPADDING:
priv->vpadding = g_value_get_int (value);
gtk_widget_queue_resize (GTK_WIDGET (bar));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_header_bar_pack (GtkHeaderBar *bar,
GtkWidget *widget,
GtkPackType pack_type)
{
Child *child;
g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
child = g_new (Child, 1);
child->widget = widget;
child->pack_type = pack_type;
bar->priv->children = g_list_append (bar->priv->children, child);
gtk_widget_freeze_child_notify (widget);
gtk_widget_set_parent (widget, GTK_WIDGET (bar));
gtk_widget_child_notify (widget, "pack-type");
gtk_widget_child_notify (widget, "position");
gtk_widget_thaw_child_notify (widget);
}
static void
gtk_header_bar_add (GtkContainer *container,
GtkWidget *child)
{
gtk_header_bar_pack (GTK_HEADER_BAR (container), child, GTK_PACK_START);
}
static GList *
find_child_link (GtkHeaderBar *bar,
GtkWidget *widget)
{
GList *l;
Child *child;
for (l = bar->priv->children; l; l = l->next)
{
child = l->data;
if (child->widget == widget)
return l;
}
return NULL;
}
static void
gtk_header_bar_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GList *l;
Child *child;
l = find_child_link (bar, widget);
if (l)
{
child = l->data;
gtk_widget_unparent (child->widget);
bar->priv->children = g_list_remove_link (bar->priv->children, l);
g_free (child);
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
static void
gtk_header_bar_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = bar->priv;
Child *child;
GList *children;
children = priv->children;
while (children)
{
child = children->data;
children = children->next;
if (child->pack_type == GTK_PACK_START)
(* callback) (child->widget, callback_data);
}
if (priv->custom_title != NULL)
(* callback) (priv->custom_title, callback_data);
if (include_internals && priv->label_box != NULL)
(* callback) (priv->label_box, callback_data);
children = priv->children;
while (children)
{
child = children->data;
children = children->next;
if (child->pack_type == GTK_PACK_END)
(* callback) (child->widget, callback_data);
}
}
static GType
gtk_header_bar_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static void
gtk_header_bar_get_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GList *l;
Child *child;
l = find_child_link (GTK_HEADER_BAR (container), widget);
if (l == NULL)
{
g_param_value_set_default (pspec, value);
return;
}
child = l->data;
switch (property_id)
{
case CHILD_PROP_PACK_TYPE:
g_value_set_enum (value, child->pack_type);
break;
case CHILD_PROP_POSITION:
g_value_set_int (value, g_list_position (GTK_HEADER_BAR (container)->priv->children, l));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_header_bar_set_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GList *l;
Child *child;
l = find_child_link (GTK_HEADER_BAR (container), widget);
child = l->data;
switch (property_id)
{
case CHILD_PROP_PACK_TYPE:
child->pack_type = g_value_get_enum (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static GtkWidgetPath *
gtk_header_bar_get_path_for_child (GtkContainer *container,
GtkWidget *child)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkWidgetPath *path, *sibling_path;
GList *list, *children;
path = _gtk_widget_create_path (GTK_WIDGET (container));
if (gtk_widget_get_visible (child))
{
gint i, position;
sibling_path = gtk_widget_path_new ();
/* get_all_children works in reverse (!) visible order */
children = _gtk_container_get_all_children (container);
if (gtk_widget_get_direction (GTK_WIDGET (bar)) == GTK_TEXT_DIR_LTR)
children = g_list_reverse (children);
position = -1;
i = 0;
for (list = children; list; list = list->next)
{
if (!gtk_widget_get_visible (list->data))
continue;
gtk_widget_path_append_for_widget (sibling_path, list->data);
if (list->data == child)
position = i;
i++;
}
g_list_free (children);
if (position >= 0)
gtk_widget_path_append_with_siblings (path, sibling_path, position);
else
gtk_widget_path_append_for_widget (path, child);
gtk_widget_path_unref (sibling_path);
}
else
gtk_widget_path_append_for_widget (path, child);
return path;
}
static gint
gtk_header_bar_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkStyleContext *context;
context = gtk_widget_get_style_context (widget);
gtk_render_background (context, cr, 0, 0,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
gtk_render_frame (context, cr, 0, 0,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->draw (widget, cr);
return TRUE;
}
static void
gtk_header_bar_class_init (GtkHeaderBarClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
object_class->finalize = gtk_header_bar_finalize;
object_class->get_property = gtk_header_bar_get_property;
object_class->set_property = gtk_header_bar_set_property;
widget_class->size_allocate = gtk_header_bar_size_allocate;
widget_class->get_preferred_width = gtk_header_bar_get_preferred_width;
widget_class->get_preferred_height = gtk_header_bar_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_header_bar_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_header_bar_get_preferred_width_for_height;
widget_class->draw = gtk_header_bar_draw;
container_class->add = gtk_header_bar_add;
container_class->remove = gtk_header_bar_remove;
container_class->forall = gtk_header_bar_forall;
container_class->child_type = gtk_header_bar_child_type;
container_class->set_child_property = gtk_header_bar_set_child_property;
container_class->get_child_property = gtk_header_bar_get_child_property;
container_class->get_path_for_child = gtk_header_bar_get_path_for_child;
gtk_container_class_handle_border_width (container_class);
gtk_container_class_install_child_property (container_class,
CHILD_PROP_PACK_TYPE,
g_param_spec_enum ("pack-type",
P_("Pack type"),
P_("A GtkPackType indicating whether the child is packed with reference to the start or end of the parent"),
GTK_TYPE_PACK_TYPE, GTK_PACK_START,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_POSITION,
g_param_spec_int ("position",
P_("Position"),
P_("The index of the child in the parent"),
-1, G_MAXINT, 0,
GTK_PARAM_READABLE));
g_object_class_install_property (object_class,
PROP_TITLE,
g_param_spec_string ("title",
P_("Title"),
P_("The title to display"),
NULL,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_SUBTITLE,
g_param_spec_string ("subtitle",
P_("Subitle"),
P_("The subtitle to display"),
NULL,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_CUSTOM_TITLE,
g_param_spec_object ("custom-title",
P_("Custom Title"),
P_("Custom title widget to display"),
GTK_TYPE_WIDGET,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class,
PROP_SPACING,
g_param_spec_int ("spacing",
P_("Spacing"),
P_("The amount of space between children"),
0, G_MAXINT,
DEFAULT_SPACING,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_HPADDING,
g_param_spec_int ("hpadding",
P_("Horizontal padding"),
P_("The amount of space to the left and right of children"),
0, G_MAXINT,
DEFAULT_HPADDING,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_VPADDING,
g_param_spec_int ("vpadding",
P_("Vertical padding"),
P_("The amount of space to the above and below children"),
0, G_MAXINT,
DEFAULT_VPADDING,
GTK_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GtkHeaderBarPrivate));
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_FILLER);
}
static void
gtk_header_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (type && strcmp (type, "title") == 0)
gtk_header_bar_set_custom_title (GTK_HEADER_BAR (buildable), GTK_WIDGET (child));
else if (!type)
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
else
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_HEADER_BAR (buildable), type);
}
static void
gtk_header_buildable_init (GtkBuildableIface *iface)
{
iface->add_child = gtk_header_buildable_add_child;
}
/**
* gtk_header_bar_pack_start:
* @bar: A #GtkHeaderBar
* @child: the #GtkWidget to be added to @bar
*
* Adds @child to @box, packed with reference to the
* start of the @box.
*
* Since: 3.10
*/
void
gtk_header_bar_pack_start (GtkHeaderBar *bar,
GtkWidget *child)
{
gtk_header_bar_pack (bar, child, GTK_PACK_START);
}
/**
* gtk_header_bar_pack_end:
* @bar: A #GtkHeaderBar
* @child: the #GtkWidget to be added to @bar
*
* Adds @child to @box, packed with reference to the
* end of the @box.
*
* Since: 3.10
*/
void
gtk_header_bar_pack_end (GtkHeaderBar *bar,
GtkWidget *child)
{
gtk_header_bar_pack (bar, child, GTK_PACK_END);
}
/**
* gtk_header_bar_new:
*
* Creates a new #GtkHeaderBar widget.
*
* Returns: a new #GtkHeaderBar
*
* Since: 3.10
*/
GtkWidget *
gtk_header_bar_new (void)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_HEADER_BAR, NULL));
}
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