forked from AuroraMiddleware/gtk
image: Add gtk_image_set_can_shrink()
Images with that value set will request a 0x0 minimum size and scale down their contents.
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@ -1507,6 +1507,8 @@ gtk_image_set_icon_size
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gtk_image_get_icon_size
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gtk_image_set_keep_aspect_ratio
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gtk_image_get_keep_aspect_ratio
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gtk_image_set_can_shrink
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gtk_image_get_can_shrink
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<SUBSECTION Standard>
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GTK_IMAGE
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GTK_IS_IMAGE
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@ -88,6 +88,7 @@ struct _GtkImagePrivate
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gchar *resource_path; /* Only used with GTK_IMAGE_SURFACE */
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guint keep_aspect_ratio : 1;
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guint can_shrink : 1;
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};
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@ -132,6 +133,7 @@ enum
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PROP_RESOURCE,
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PROP_USE_FALLBACK,
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PROP_KEEP_ASPECT_RATIO,
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PROP_CAN_SHRINK,
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NUM_PROPERTIES
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};
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@ -277,6 +279,18 @@ gtk_image_class_init (GtkImageClass *class)
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TRUE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkImage:can-shrink
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*
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* If the #GtkImage can be made smaller than the image it contains.
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*/
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image_props[PROP_CAN_SHRINK] =
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g_param_spec_boolean ("can-shrink",
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P_("Can shrink"),
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P_("Allow image to be smaller than contents"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (gobject_class, NUM_PROPERTIES, image_props);
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gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_IMAGE_ACCESSIBLE);
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@ -357,6 +371,10 @@ gtk_image_set_property (GObject *object,
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gtk_image_set_keep_aspect_ratio (image, g_value_get_boolean (value));
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break;
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case PROP_CAN_SHRINK:
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gtk_image_set_can_shrink (image, g_value_get_boolean (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -404,6 +422,9 @@ gtk_image_get_property (GObject *object,
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case PROP_KEEP_ASPECT_RATIO:
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g_value_set_boolean (value, priv->keep_aspect_ratio);
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break;
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case PROP_CAN_SHRINK:
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g_value_set_boolean (value, priv->can_shrink);
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break;
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case PROP_STORAGE_TYPE:
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g_value_set_enum (value, _gtk_icon_helper_get_storage_type (priv->icon_helper));
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break;
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@ -1391,6 +1412,9 @@ gtk_image_measure (GtkWidget *widget,
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for_size,
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minimum, natural);
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if (priv->can_shrink)
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*minimum = 0;
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if (orientation == GTK_ORIENTATION_VERTICAL)
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{
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baseline_align = gtk_image_get_baseline_align (GTK_IMAGE (widget));
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@ -1545,6 +1569,54 @@ gtk_image_get_keep_aspect_ratio (GtkImage *image)
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return priv->keep_aspect_ratio;
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}
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/**
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* gtk_image_set_can_shrink:
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* @image: a #GtkImage
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* @can_shrink: if the @image can be made smaller than its contents
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*
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* If set to %TRUE, the @image can be made smaller than its contents.
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* The contents will be scaled down when rendering.
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*
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* If you want to still force a minimum size manually, consider using
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* gtk_widget_set_size_request().
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*
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* Also of note is that a similar function for growing does not exist
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* because the grow behavior can be controlled via
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* gtk_widget_set_halign() and gtk_widget_set_valign().
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*/
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void
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gtk_image_set_can_shrink (GtkImage *image,
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gboolean can_shrink)
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{
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GtkImagePrivate *priv = gtk_image_get_instance_private (image);
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g_return_if_fail (GTK_IS_IMAGE (image));
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if (priv->can_shrink == can_shrink)
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return;
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priv->can_shrink = can_shrink;
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g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_CAN_SHRINK]);
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}
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/**
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* gtk_image_get_can_shrink:
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* @image: a #GtkImage
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*
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* Gets the value set via gtk_image_set_can_shrink().
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*
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* Returns: %TRUE if the image can be made smaller than its contents
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**/
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gboolean
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gtk_image_get_can_shrink (GtkImage *image)
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{
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GtkImagePrivate *priv = gtk_image_get_instance_private (image);
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g_return_val_if_fail (GTK_IS_IMAGE (image), FALSE);
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return priv->can_shrink;
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}
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void
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gtk_image_get_image_size (GtkImage *image,
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int *width,
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@ -151,6 +151,9 @@ void gtk_image_set_icon_size (GtkImage *image,
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GDK_AVAILABLE_IN_ALL
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void gtk_image_set_keep_aspect_ratio (GtkImage *image,
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gboolean keep_aspect_ratio);
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GDK_AVAILABLE_IN_ALL
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void gtk_image_set_can_shrink (GtkImage *image,
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gboolean can_shrink);
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GDK_AVAILABLE_IN_ALL
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GtkImageType gtk_image_get_storage_type (GtkImage *image);
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@ -170,6 +173,8 @@ GDK_AVAILABLE_IN_ALL
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GtkIconSize gtk_image_get_icon_size (GtkImage *image);
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GDK_AVAILABLE_IN_ALL
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gboolean gtk_image_get_keep_aspect_ratio (GtkImage *image);
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GDK_AVAILABLE_IN_ALL
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gboolean gtk_image_get_can_shrink (GtkImage *image);
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G_END_DECLS
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