* 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
+/**
+ * SECTION:gtkarrow
+ * @Short_description: Displays an arrow
+ * @Title: GtkArrow
+ * @See_also: gtk_render_arrow()
+ *
+ * GtkArrow should be used to draw simple arrows that need to point in
+ * one of the four cardinal directions (up, down, left, or right). The
+ * style of the arrow can be one of shadow in, shadow out, etched in, or
+ * etched out. Note that these directions and style types may be
+ * amended in versions of GTK+ to come.
+ *
+ * GtkArrow will fill any space alloted to it, but since it is inherited
+ * from #GtkMisc, it can be padded and/or aligned, to fill exactly the
+ * space the programmer desires.
+ *
+ * Arrows are created with a call to gtk_arrow_new(). The direction or
+ * style of an arrow can be changed after creation by using gtk_arrow_set().
+ */
+
#include "config.h"
#include <math.h>
#include "gtkarrow.h"
+#include "gtksizerequest.h"
+#include "gtktypebuiltins.h"
#include "gtkprivate.h"
#include "gtkintl.h"
-#include "gtkalias.h"
+
+#include "a11y/gtkarrowaccessible.h"
#define MIN_ARROW_SIZE 15
+struct _GtkArrowPrivate
+{
+ gint16 arrow_type;
+ gint16 shadow_type;
+};
+
enum {
PROP_0,
PROP_ARROW_TYPE,
guint prop_id,
GValue *value,
GParamSpec *pspec);
-static gboolean gtk_arrow_expose (GtkWidget *widget,
- GdkEventExpose *event);
+static gboolean gtk_arrow_draw (GtkWidget *widget,
+ cairo_t *cr);
+static void gtk_arrow_get_preferred_width (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size);
+static void gtk_arrow_get_preferred_height (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size);
G_DEFINE_TYPE (GtkArrow, gtk_arrow, GTK_TYPE_MISC)
gobject_class->set_property = gtk_arrow_set_property;
gobject_class->get_property = gtk_arrow_get_property;
- widget_class->expose_event = gtk_arrow_expose;
+ widget_class->draw = gtk_arrow_draw;
+ widget_class->get_preferred_width = gtk_arrow_get_preferred_width;
+ widget_class->get_preferred_height = gtk_arrow_get_preferred_height;
g_object_class_install_property (gobject_class,
PROP_ARROW_TYPE,
P_("Amount of space used up by arrow"),
0.0, 1.0, 0.7,
GTK_PARAM_READABLE));
+
+ g_type_class_add_private (class, sizeof (GtkArrowPrivate));
+
+ gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_ARROW_ACCESSIBLE);
}
static void
GParamSpec *pspec)
{
GtkArrow *arrow = GTK_ARROW (object);
+ GtkArrowPrivate *priv = arrow->priv;
switch (prop_id)
{
case PROP_ARROW_TYPE:
gtk_arrow_set (arrow,
g_value_get_enum (value),
- arrow->shadow_type);
+ priv->shadow_type);
break;
case PROP_SHADOW_TYPE:
gtk_arrow_set (arrow,
- arrow->arrow_type,
+ priv->arrow_type,
g_value_get_enum (value));
break;
default:
GParamSpec *pspec)
{
GtkArrow *arrow = GTK_ARROW (object);
+ GtkArrowPrivate *priv = arrow->priv;
switch (prop_id)
{
case PROP_ARROW_TYPE:
- g_value_set_enum (value, arrow->arrow_type);
+ g_value_set_enum (value, priv->arrow_type);
break;
case PROP_SHADOW_TYPE:
- g_value_set_enum (value, arrow->shadow_type);
+ g_value_set_enum (value, priv->shadow_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
static void
gtk_arrow_init (GtkArrow *arrow)
{
+ GtkArrowPrivate *priv;
+
+ arrow->priv = G_TYPE_INSTANCE_GET_PRIVATE (arrow,
+ GTK_TYPE_ARROW,
+ GtkArrowPrivate);
+ priv = arrow->priv;
+
gtk_widget_set_has_window (GTK_WIDGET (arrow), FALSE);
- GTK_WIDGET (arrow)->requisition.width = MIN_ARROW_SIZE + GTK_MISC (arrow)->xpad * 2;
- GTK_WIDGET (arrow)->requisition.height = MIN_ARROW_SIZE + GTK_MISC (arrow)->ypad * 2;
+ priv->arrow_type = GTK_ARROW_RIGHT;
+ priv->shadow_type = GTK_SHADOW_OUT;
+}
+
+static void
+gtk_arrow_get_preferred_width (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size)
+{
+ GtkBorder border;
+
+ _gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
- arrow->arrow_type = GTK_ARROW_RIGHT;
- arrow->shadow_type = GTK_SHADOW_OUT;
+ if (minimum_size)
+ *minimum_size = MIN_ARROW_SIZE + border.left + border.right;
+
+ if (natural_size)
+ *natural_size = MIN_ARROW_SIZE + border.left + border.right;
}
+static void
+gtk_arrow_get_preferred_height (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size)
+{
+ GtkBorder border;
+
+ _gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
+
+ if (minimum_size)
+ *minimum_size = MIN_ARROW_SIZE + border.top + border.bottom;
+
+ if (natural_size)
+ *natural_size = MIN_ARROW_SIZE + border.top + border.bottom;
+}
+
+/**
+ * gtk_arrow_new:
+ * @arrow_type: a valid #GtkArrowType.
+ * @shadow_type: a valid #GtkShadowType.
+ *
+ * Creates a new #GtkArrow widget.
+ *
+ * Returns: the new #GtkArrow widget.
+ */
GtkWidget*
gtk_arrow_new (GtkArrowType arrow_type,
GtkShadowType shadow_type)
{
+ GtkArrowPrivate *priv;
GtkArrow *arrow;
arrow = g_object_new (GTK_TYPE_ARROW, NULL);
- arrow->arrow_type = arrow_type;
- arrow->shadow_type = shadow_type;
+ priv = arrow->priv;
+
+ priv->arrow_type = arrow_type;
+ priv->shadow_type = shadow_type;
return GTK_WIDGET (arrow);
}
+/**
+ * gtk_arrow_set:
+ * @arrow: a widget of type #GtkArrow.
+ * @arrow_type: a valid #GtkArrowType.
+ * @shadow_type: a valid #GtkShadowType.
+ *
+ * Sets the direction and style of the #GtkArrow, @arrow.
+ */
void
gtk_arrow_set (GtkArrow *arrow,
GtkArrowType arrow_type,
GtkShadowType shadow_type)
{
+ GtkArrowPrivate *priv;
GtkWidget *widget;
g_return_if_fail (GTK_IS_ARROW (arrow));
- if ( ((GtkArrowType) arrow->arrow_type != arrow_type)
- || ((GtkShadowType) arrow->shadow_type != shadow_type))
+ priv = arrow->priv;
+
+ if (priv->arrow_type != arrow_type
+ || priv->shadow_type != shadow_type)
{
g_object_freeze_notify (G_OBJECT (arrow));
- if ((GtkArrowType) arrow->arrow_type != arrow_type)
+ if ((GtkArrowType) priv->arrow_type != arrow_type)
{
- arrow->arrow_type = arrow_type;
+ priv->arrow_type = arrow_type;
g_object_notify (G_OBJECT (arrow), "arrow-type");
}
- if ((GtkShadowType) arrow->shadow_type != shadow_type)
+ if (priv->shadow_type != shadow_type)
{
- arrow->shadow_type = shadow_type;
+ priv->shadow_type = shadow_type;
g_object_notify (G_OBJECT (arrow), "shadow-type");
}
}
}
-
static gboolean
-gtk_arrow_expose (GtkWidget *widget,
- GdkEventExpose *event)
+gtk_arrow_draw (GtkWidget *widget,
+ cairo_t *cr)
{
- if (gtk_widget_is_drawable (widget))
+ GtkArrow *arrow = GTK_ARROW (widget);
+ GtkArrowPrivate *priv = arrow->priv;
+ GtkStyleContext *context;
+ gdouble x, y;
+ gint width, height;
+ gint extent;
+ GtkBorder border;
+ gfloat xalign, yalign;
+ GtkArrowType effective_arrow_type;
+ gfloat arrow_scaling;
+ gdouble angle;
+
+ if (priv->arrow_type == GTK_ARROW_NONE)
+ return FALSE;
+
+ context = gtk_widget_get_style_context (widget);
+ gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
+
+ _gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
+ gtk_misc_get_alignment (GTK_MISC (widget), &xalign, &yalign);
+
+ width = gtk_widget_get_allocated_width (widget) - border.left - border.right;
+ height = gtk_widget_get_allocated_height (widget) - border.top - border.bottom;
+
+ extent = MIN (width, height) * arrow_scaling;
+ effective_arrow_type = priv->arrow_type;
+
+ if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
{
- GtkArrow *arrow = GTK_ARROW (widget);
- GtkMisc *misc = GTK_MISC (widget);
- GtkShadowType shadow_type;
- gint width, height;
- gint x, y;
- gint extent;
- gfloat xalign;
- GtkArrowType effective_arrow_type;
- gfloat arrow_scaling;
-
- gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
-
- width = widget->allocation.width - misc->xpad * 2;
- height = widget->allocation.height - misc->ypad * 2;
- extent = MIN (width, height) * arrow_scaling;
- effective_arrow_type = arrow->arrow_type;
-
- if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
- xalign = misc->xalign;
- else
- {
- xalign = 1.0 - misc->xalign;
- if (arrow->arrow_type == GTK_ARROW_LEFT)
- effective_arrow_type = GTK_ARROW_RIGHT;
- else if (arrow->arrow_type == GTK_ARROW_RIGHT)
- effective_arrow_type = GTK_ARROW_LEFT;
- }
-
- x = floor (widget->allocation.x + misc->xpad
- + ((widget->allocation.width - extent) * xalign));
- y = floor (widget->allocation.y + misc->ypad
- + ((widget->allocation.height - extent) * misc->yalign));
-
- shadow_type = arrow->shadow_type;
-
- if (widget->state == GTK_STATE_ACTIVE)
- {
- if (shadow_type == GTK_SHADOW_IN)
- shadow_type = GTK_SHADOW_OUT;
- else if (shadow_type == GTK_SHADOW_OUT)
- shadow_type = GTK_SHADOW_IN;
- else if (shadow_type == GTK_SHADOW_ETCHED_IN)
- shadow_type = GTK_SHADOW_ETCHED_OUT;
- else if (shadow_type == GTK_SHADOW_ETCHED_OUT)
- shadow_type = GTK_SHADOW_ETCHED_IN;
- }
-
- gtk_paint_arrow (widget->style, widget->window,
- widget->state, shadow_type,
- &event->area, widget, "arrow",
- effective_arrow_type, TRUE,
- x, y, extent, extent);
+ xalign = 1.0 - xalign;
+ if (priv->arrow_type == GTK_ARROW_LEFT)
+ effective_arrow_type = GTK_ARROW_RIGHT;
+ else if (priv->arrow_type == GTK_ARROW_RIGHT)
+ effective_arrow_type = GTK_ARROW_LEFT;
}
+ x = border.left + ((width - extent) * xalign);
+ y = border.top + ((height - extent) * yalign);
+
+ switch (effective_arrow_type)
+ {
+ case GTK_ARROW_UP:
+ angle = 0;
+ break;
+ case GTK_ARROW_RIGHT:
+ angle = G_PI / 2;
+ break;
+ case GTK_ARROW_DOWN:
+ angle = G_PI;
+ break;
+ case GTK_ARROW_LEFT:
+ default:
+ angle = (3 * G_PI) / 2;
+ break;
+ }
+
+ gtk_render_arrow (context, cr, angle, x, y, extent);
+
return FALSE;
}
-
-#define __GTK_ARROW_C__
-#include "gtkaliasdef.c"
projects / ~andy / gtk / blobdiff