* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * 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 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library 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.
+ * 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/>.
*/
+
+/*
+ * Modified by the GTK+ Team and others 1997-2001. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * 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 "a11y/gtkarrowaccessible.h"
-#define MIN_ARROW_SIZE 11
+#define MIN_ARROW_SIZE 15
-enum {
- ARG_0,
- ARG_ARROW_TYPE,
- ARG_SHADOW_TYPE
+struct _GtkArrowPrivate
+{
+ gint16 arrow_type;
+ gint16 shadow_type;
};
+enum {
+ PROP_0,
+ PROP_ARROW_TYPE,
+ PROP_SHADOW_TYPE
+};
-static void gtk_arrow_class_init (GtkArrowClass *klass);
-static void gtk_arrow_init (GtkArrow *arrow);
-static gint gtk_arrow_expose (GtkWidget *widget,
- GdkEventExpose *event);
-static void gtk_arrow_set_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
-static void gtk_arrow_get_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
+static void gtk_arrow_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gtk_arrow_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+static gboolean gtk_arrow_draw (GtkWidget *widget,
+ cairo_t *cr);
-GtkType
-gtk_arrow_get_type (void)
-{
- static GtkType arrow_type = 0;
+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);
- if (!arrow_type)
- {
- GtkTypeInfo arrow_info =
- {
- "GtkArrow",
- sizeof (GtkArrow),
- sizeof (GtkArrowClass),
- (GtkClassInitFunc) gtk_arrow_class_init,
- (GtkObjectInitFunc) gtk_arrow_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
-
- arrow_type = gtk_type_unique (GTK_TYPE_MISC, &arrow_info);
- }
+G_DEFINE_TYPE (GtkArrow, gtk_arrow, GTK_TYPE_MISC)
- return arrow_type;
-}
static void
gtk_arrow_class_init (GtkArrowClass *class)
{
- GtkObjectClass *object_class;
+ GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
- object_class = (GtkObjectClass*) class;
+ gobject_class = (GObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
- gtk_object_add_arg_type ("GtkArrow::arrow_type", GTK_TYPE_ARROW_TYPE, GTK_ARG_READWRITE, ARG_ARROW_TYPE);
- gtk_object_add_arg_type ("GtkArrow::shadow_type", GTK_TYPE_SHADOW_TYPE, GTK_ARG_READWRITE, ARG_SHADOW_TYPE);
-
- object_class->set_arg = gtk_arrow_set_arg;
- object_class->get_arg = gtk_arrow_get_arg;
-
- widget_class->expose_event = gtk_arrow_expose;
+ gobject_class->set_property = gtk_arrow_set_property;
+ gobject_class->get_property = gtk_arrow_get_property;
+
+ 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,
+ g_param_spec_enum ("arrow-type",
+ P_("Arrow direction"),
+ P_("The direction the arrow should point"),
+ GTK_TYPE_ARROW_TYPE,
+ GTK_ARROW_RIGHT,
+ GTK_PARAM_READWRITE));
+
+ g_object_class_install_property (gobject_class,
+ PROP_SHADOW_TYPE,
+ g_param_spec_enum ("shadow-type",
+ P_("Arrow shadow"),
+ P_("Appearance of the shadow surrounding the arrow"),
+ GTK_TYPE_SHADOW_TYPE,
+ GTK_SHADOW_OUT,
+ GTK_PARAM_READWRITE));
+
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_float ("arrow-scaling",
+ P_("Arrow Scaling"),
+ 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
-gtk_arrow_set_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id)
+gtk_arrow_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
{
- GtkArrow *arrow;
-
- arrow = GTK_ARROW (object);
+ GtkArrow *arrow = GTK_ARROW (object);
+ GtkArrowPrivate *priv = arrow->priv;
- switch (arg_id)
+ switch (prop_id)
{
- case ARG_ARROW_TYPE:
+ case PROP_ARROW_TYPE:
gtk_arrow_set (arrow,
- GTK_VALUE_ENUM (*arg),
- arrow->shadow_type);
+ g_value_get_enum (value),
+ priv->shadow_type);
break;
- case ARG_SHADOW_TYPE:
+ case PROP_SHADOW_TYPE:
gtk_arrow_set (arrow,
- arrow->arrow_type,
- GTK_VALUE_ENUM (*arg));
+ priv->arrow_type,
+ g_value_get_enum (value));
break;
default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
-gtk_arrow_get_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id)
+gtk_arrow_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
{
- GtkArrow *arrow;
+ GtkArrow *arrow = GTK_ARROW (object);
+ GtkArrowPrivate *priv = arrow->priv;
- arrow = GTK_ARROW (object);
- switch (arg_id)
+ switch (prop_id)
{
- case ARG_ARROW_TYPE:
- GTK_VALUE_ENUM (*arg) = arrow->arrow_type;
+ case PROP_ARROW_TYPE:
+ g_value_set_enum (value, priv->arrow_type);
break;
- case ARG_SHADOW_TYPE:
- GTK_VALUE_ENUM (*arg) = arrow->shadow_type;
+ case PROP_SHADOW_TYPE:
+ g_value_set_enum (value, priv->shadow_type);
break;
default:
- arg->type = GTK_TYPE_INVALID;
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_arrow_init (GtkArrow *arrow)
{
- GTK_WIDGET_SET_FLAGS (arrow, GTK_NO_WINDOW);
+ 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);
+
+ 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_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;
+ _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 = gtk_type_new (GTK_TYPE_ARROW);
+ arrow = g_object_new (GTK_TYPE_ARROW, NULL);
+
+ priv = arrow->priv;
- arrow->arrow_type = arrow_type;
- arrow->shadow_type = shadow_type;
+ 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)
{
- g_return_if_fail (arrow != NULL);
+ 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)
{
- arrow->arrow_type = arrow_type;
- arrow->shadow_type = shadow_type;
+ g_object_freeze_notify (G_OBJECT (arrow));
- if (GTK_WIDGET_DRAWABLE (arrow))
- gtk_widget_queue_clear (GTK_WIDGET (arrow));
+ if ((GtkArrowType) priv->arrow_type != arrow_type)
+ {
+ priv->arrow_type = arrow_type;
+ g_object_notify (G_OBJECT (arrow), "arrow-type");
+ }
+
+ if (priv->shadow_type != shadow_type)
+ {
+ priv->shadow_type = shadow_type;
+ g_object_notify (G_OBJECT (arrow), "shadow-type");
+ }
+
+ g_object_thaw_notify (G_OBJECT (arrow));
+
+ widget = GTK_WIDGET (arrow);
+ if (gtk_widget_is_drawable (widget))
+ gtk_widget_queue_draw (widget);
}
}
-
-static gint
-gtk_arrow_expose (GtkWidget *widget,
- GdkEventExpose *event)
+static gboolean
+gtk_arrow_draw (GtkWidget *widget,
+ cairo_t *cr)
{
- GtkArrow *arrow;
- GtkMisc *misc;
- GtkShadowType shadow_type;
+ GtkArrow *arrow = GTK_ARROW (widget);
+ GtkArrowPrivate *priv = arrow->priv;
+ GtkStyleContext *context;
+ gdouble x, y;
gint width, height;
- gint x, y;
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);
- g_return_val_if_fail (widget != NULL, FALSE);
- g_return_val_if_fail (GTK_IS_ARROW (widget), FALSE);
- g_return_val_if_fail (event != NULL, FALSE);
+ width = gtk_widget_get_allocated_width (widget) - border.left - border.right;
+ height = gtk_widget_get_allocated_height (widget) - border.top - border.bottom;
- if (GTK_WIDGET_DRAWABLE (widget))
+ extent = MIN (width, height) * arrow_scaling;
+ effective_arrow_type = priv->arrow_type;
+
+ if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
{
- arrow = GTK_ARROW (widget);
- misc = GTK_MISC (widget);
-
- width = widget->allocation.width - misc->xpad * 2;
- height = widget->allocation.height - misc->ypad * 2;
- extent = MIN (width, height);
-
- x = ((widget->allocation.x + misc->xpad) * (1.0 - misc->xalign) +
- (widget->allocation.x + widget->allocation.width - extent - misc->xpad) * misc->xalign);
- y = ((widget->allocation.y + misc->ypad) * (1.0 - misc->yalign) +
- (widget->allocation.y + widget->allocation.height - extent - misc->ypad) * 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",
- arrow->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;
}
- return TRUE;
+ 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;
}
projects / ~andy / gtk / blobdiff