gtk2/gtk/gtkbuiltinicon.c
Benjamin Otte 87497ca2e1 snapshot: Rename gtk_snapshot_translate_2d()
It's now called gtk_snapshot_offset().
2017-01-13 14:37:48 +01:00

268 lines
8.4 KiB
C

/*
* Copyright © 2015 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkbuiltiniconprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkrendericonprivate.h"
#include "gtksnapshot.h"
/* GtkBuiltinIcon is a gadget implementation that is meant to replace
* all calls to gtk_render_ functions to render arrows, expanders, checks
* radios, handles, separators, etc. See the GtkCssImageBuiltinType
* enumeration for the full set of builtin icons that this gadget can
* render.
*
* Use gtk_builtin_icon_set_image to set which of the builtin icons
* is rendered.
*
* Use gtk_builtin_icon_set_default_size to set a non-zero default
* size for the icon.
*
* Themes can override the acutal image that is used with the
* -gtk-icon-source property. If it is not specified, a builtin
* fallback is used.
*/
typedef struct _GtkBuiltinIconPrivate GtkBuiltinIconPrivate;
struct _GtkBuiltinIconPrivate {
GtkCssImageBuiltinType image_type;
int default_size;
int strikethrough;
gboolean strikethrough_valid;
};
G_DEFINE_TYPE_WITH_CODE (GtkBuiltinIcon, gtk_builtin_icon, GTK_TYPE_CSS_GADGET,
G_ADD_PRIVATE (GtkBuiltinIcon))
static void
gtk_builtin_icon_get_preferred_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkBuiltinIconPrivate *priv = gtk_builtin_icon_get_instance_private (GTK_BUILTIN_ICON (gadget));
double min_size;
guint property;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
property = GTK_CSS_PROPERTY_MIN_WIDTH;
else
property = GTK_CSS_PROPERTY_MIN_HEIGHT;
min_size = _gtk_css_number_value_get (gtk_css_style_get_value (gtk_css_gadget_get_style (gadget), property), 100);
if (min_size > 0.0)
{
*minimum = *natural = min_size;
}
else
{
*minimum = *natural = priv->default_size;
}
if (minimum_baseline)
{
if (!priv->strikethrough_valid)
{
GtkWidget *widget;
PangoContext *pango_context;
const PangoFontDescription *font_desc;
PangoFontMetrics *metrics;
widget = gtk_css_gadget_get_owner (gadget);
pango_context = gtk_widget_get_pango_context (widget);
font_desc = pango_context_get_font_description (pango_context);
metrics = pango_context_get_metrics (pango_context,
font_desc,
pango_context_get_language (pango_context));
priv->strikethrough = pango_font_metrics_get_strikethrough_position (metrics);
priv->strikethrough_valid = TRUE;
pango_font_metrics_unref (metrics);
}
*minimum_baseline = *minimum * 0.5 + PANGO_PIXELS (priv->strikethrough);
}
if (natural_baseline)
*natural_baseline = *minimum_baseline;
}
static void
gtk_builtin_icon_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip)
{
GdkRectangle icon_clip;
GTK_CSS_GADGET_CLASS (gtk_builtin_icon_parent_class)->allocate (gadget, allocation, baseline, out_clip);
gtk_css_style_render_icon_get_extents (gtk_css_gadget_get_style (gadget),
&icon_clip,
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_rectangle_union (out_clip, &icon_clip, out_clip);
}
static gboolean
gtk_builtin_icon_snapshot (GtkCssGadget *gadget,
GtkSnapshot *snapshot,
int x,
int y,
int width,
int height)
{
GtkBuiltinIconPrivate *priv = gtk_builtin_icon_get_instance_private (GTK_BUILTIN_ICON (gadget));
gtk_snapshot_offset (snapshot, x, y);
gtk_css_style_snapshot_icon (gtk_css_gadget_get_style (gadget),
snapshot,
width, height,
priv->image_type);
gtk_snapshot_offset (snapshot, -x, -y);
return FALSE;
}
static void
gtk_builtin_icon_style_changed (GtkCssGadget *gadget,
GtkCssStyleChange *change)
{
GtkBuiltinIconPrivate *priv = gtk_builtin_icon_get_instance_private (GTK_BUILTIN_ICON (gadget));
if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_FONT))
priv->strikethrough_valid = FALSE;
GTK_CSS_GADGET_CLASS (gtk_builtin_icon_parent_class)->style_changed (gadget, change);
}
static void
gtk_builtin_icon_class_init (GtkBuiltinIconClass *klass)
{
GtkCssGadgetClass *gadget_class = GTK_CSS_GADGET_CLASS (klass);
gadget_class->get_preferred_size = gtk_builtin_icon_get_preferred_size;
gadget_class->allocate = gtk_builtin_icon_allocate;
gadget_class->snapshot = gtk_builtin_icon_snapshot;
gadget_class->style_changed = gtk_builtin_icon_style_changed;
}
static void
gtk_builtin_icon_init (GtkBuiltinIcon *custom_gadget)
{
}
GtkCssGadget *
gtk_builtin_icon_new_for_node (GtkCssNode *node,
GtkWidget *owner)
{
return g_object_new (GTK_TYPE_BUILTIN_ICON,
"node", node,
"owner", owner,
NULL);
}
GtkCssGadget *
gtk_builtin_icon_new (const char *name,
GtkWidget *owner,
GtkCssGadget *parent,
GtkCssGadget *next_sibling)
{
GtkCssNode *node;
GtkCssGadget *result;
node = gtk_css_node_new ();
gtk_css_node_set_name (node, g_intern_string (name));
if (parent)
gtk_css_node_insert_before (gtk_css_gadget_get_node (parent),
node,
next_sibling ? gtk_css_gadget_get_node (next_sibling) : NULL);
result = gtk_builtin_icon_new_for_node (node, owner);
g_object_unref (node);
return result;
}
void
gtk_builtin_icon_set_image (GtkBuiltinIcon *icon,
GtkCssImageBuiltinType image)
{
GtkBuiltinIconPrivate *priv;
g_return_if_fail (GTK_IS_BUILTIN_ICON (icon));
priv = gtk_builtin_icon_get_instance_private (icon);
if (priv->image_type != image)
{
priv->image_type = image;
gtk_widget_queue_draw (gtk_css_gadget_get_owner (GTK_CSS_GADGET (icon)));
}
}
GtkCssImageBuiltinType
gtk_builtin_icon_get_image (GtkBuiltinIcon *icon)
{
GtkBuiltinIconPrivate *priv;
g_return_val_if_fail (GTK_IS_BUILTIN_ICON (icon), GTK_CSS_IMAGE_BUILTIN_NONE);
priv = gtk_builtin_icon_get_instance_private (icon);
return priv->image_type;
}
void
gtk_builtin_icon_set_default_size (GtkBuiltinIcon *icon,
int default_size)
{
GtkBuiltinIconPrivate *priv;
g_return_if_fail (GTK_IS_BUILTIN_ICON (icon));
priv = gtk_builtin_icon_get_instance_private (icon);
if (priv->default_size != default_size)
{
priv->default_size = default_size;
gtk_widget_queue_resize (gtk_css_gadget_get_owner (GTK_CSS_GADGET (icon)));
}
}
int
gtk_builtin_icon_get_default_size (GtkBuiltinIcon *icon)
{
GtkBuiltinIconPrivate *priv;
g_return_val_if_fail (GTK_IS_BUILTIN_ICON (icon), GTK_CSS_IMAGE_BUILTIN_NONE);
priv = gtk_builtin_icon_get_instance_private (icon);
return priv->default_size;
}