* 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
+ * 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.
*/
+
+/*
+ * 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_paint_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
+ * ammended 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 "gtkprivate.h"
+#include "gtkintl.h"
+#define MIN_ARROW_SIZE 15
-#define MIN_ARROW_SIZE 11
+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_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_expose (GtkWidget *widget,
+ GdkEventExpose *event);
-guint
-gtk_arrow_get_type ()
-{
- static guint arrow_type = 0;
- if (!arrow_type)
- {
- GtkTypeInfo arrow_info =
- {
- "GtkArrow",
- sizeof (GtkArrow),
- sizeof (GtkArrowClass),
- (GtkClassInitFunc) gtk_arrow_class_init,
- (GtkObjectInitFunc) gtk_arrow_init,
- (GtkArgSetFunc) NULL,
- (GtkArgGetFunc) NULL,
- };
-
- arrow_type = gtk_type_unique (gtk_misc_get_type (), &arrow_info);
- }
+G_DEFINE_TYPE (GtkArrow, gtk_arrow, GTK_TYPE_MISC)
- return arrow_type;
-}
static void
gtk_arrow_class_init (GtkArrowClass *class)
{
+ GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
+ gobject_class = (GObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
+ gobject_class->set_property = gtk_arrow_set_property;
+ gobject_class->get_property = gtk_arrow_get_property;
+
widget_class->expose_event = gtk_arrow_expose;
+
+ 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));
+}
+
+static void
+gtk_arrow_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ 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),
+ priv->shadow_type);
+ break;
+ case PROP_SHADOW_TYPE:
+ gtk_arrow_set (arrow,
+ 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_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GtkArrow *arrow = GTK_ARROW (object);
+ GtkArrowPrivate *priv = arrow->priv;
+
+ switch (prop_id)
+ {
+ case PROP_ARROW_TYPE:
+ g_value_set_enum (value, priv->arrow_type);
+ break;
+ case PROP_SHADOW_TYPE:
+ g_value_set_enum (value, priv->shadow_type);
+ break;
+ default:
+ 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;
+ gint xpad, ypad;
+
+ arrow->priv = G_TYPE_INSTANCE_GET_PRIVATE (arrow,
+ GTK_TYPE_ARROW,
+ GtkArrowPrivate);
+ priv = arrow->priv;
+
+ gtk_widget_set_has_window (GTK_WIDGET (arrow), FALSE);
- arrow->arrow_type = GTK_ARROW_RIGHT;
- arrow->shadow_type = GTK_SHADOW_OUT;
+ gtk_misc_get_padding (GTK_MISC (arrow), &xpad, &ypad);
+ GTK_WIDGET (arrow)->requisition.width = MIN_ARROW_SIZE + xpad * 2;
+ GTK_WIDGET (arrow)->requisition.height = MIN_ARROW_SIZE + ypad * 2;
+
+ priv->arrow_type = GTK_ARROW_RIGHT;
+ priv->shadow_type = GTK_SHADOW_OUT;
}
+/**
+ * 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_arrow_get_type ());
+ arrow = g_object_new (GTK_TYPE_ARROW, NULL);
- 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->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))
- {
- gdk_window_clear_area (GTK_WIDGET (arrow)->window,
- GTK_WIDGET (arrow)->allocation.x + 1,
- GTK_WIDGET (arrow)->allocation.y + 1,
- GTK_WIDGET (arrow)->allocation.width - 2,
- GTK_WIDGET (arrow)->allocation.height - 2);
- gtk_widget_queue_draw (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
+static gboolean
gtk_arrow_expose (GtkWidget *widget,
GdkEventExpose *event)
{
- GtkArrow *arrow;
- GtkMisc *misc;
- GtkShadowType shadow_type;
- gint width, height;
- gint x, y;
- gint extent;
-
- 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);
-
- if (GTK_WIDGET_DRAWABLE (widget))
+ if (gtk_widget_is_drawable (widget))
{
- 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);
+ GtkArrow *arrow = GTK_ARROW (widget);
+ GtkArrowPrivate *priv = arrow->priv;
+ GtkMisc *misc = GTK_MISC (widget);
+ GtkShadowType shadow_type;
+ gint width, height;
+ gint x, y;
+ gint extent;
+ gint xpad, ypad;
+ gfloat xalign, yalign;
+ GtkArrowType effective_arrow_type;
+ gfloat arrow_scaling;
+
+ gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
+
+ gtk_misc_get_padding (misc, &xpad, &ypad);
+ gtk_misc_get_alignment (misc, &xalign, &yalign);
+
+ width = widget->allocation.width - xpad * 2;
+ height = widget->allocation.height - ypad * 2;
+ extent = MIN (width, height) * arrow_scaling;
+ effective_arrow_type = priv->arrow_type;
+
+ if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
+ {
+ 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 = ((widget->allocation.x + misc->xpad) * (1.0 - misc->xalign) +
- (widget->allocation.x + widget->allocation.width - extent - misc->ypad) * misc->xalign);
- y = ((widget->allocation.y + misc->ypad) * (1.0 - misc->yalign) +
- (widget->allocation.y + widget->allocation.height - extent - misc->ypad) * misc->yalign);
+ x = floor (widget->allocation.x + xpad
+ + ((widget->allocation.width - extent) * xalign));
+ y = floor (widget->allocation.y + ypad
+ + ((widget->allocation.height - extent) * yalign));
- shadow_type = arrow->shadow_type;
+ shadow_type = priv->shadow_type;
if (widget->state == GTK_STATE_ACTIVE)
{
shadow_type = GTK_SHADOW_ETCHED_IN;
}
- gtk_draw_arrow (widget->style, widget->window,
- widget->state, shadow_type, arrow->arrow_type, TRUE,
- x, y, extent, extent);
+ gtk_paint_arrow (widget->style, widget->window,
+ widget->state, shadow_type,
+ &event->area, widget, "arrow",
+ effective_arrow_type, TRUE,
+ x, y, extent, extent);
}
return FALSE;