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livetrax/gtk2_ardour/gtk-custom-ruler.c

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/* GTK - The GIMP Toolkit
* 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
* 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.
*
* 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.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. 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/.
*/
/* modified by andreas meyer <hexx3000@gmx.de> */
#include <stdio.h>
#include "gettext.h"
#define _(Text) dgettext (PACKAGE,Text)
#include "gtk-custom-ruler.h"
enum
{
PROP_0,
PROP_LOWER,
PROP_UPPER,
PROP_POSITION,
PROP_MAX_SIZE,
PROP_SHOW_POSITION
};
static void gtk_custom_ruler_class_init (GtkCustomRulerClass * klass);
static void gtk_custom_ruler_init (GtkCustomRuler * ruler);
static void gtk_custom_ruler_realize (GtkWidget * widget);
static void gtk_custom_ruler_unrealize (GtkWidget * widget);
static void gtk_custom_ruler_size_allocate (GtkWidget * widget, GtkAllocation * allocation);
static gint gtk_custom_ruler_expose (GtkWidget * widget, GdkEventExpose * event);
static void gtk_custom_ruler_make_pixmap (GtkCustomRuler * ruler);
static void gtk_custom_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_custom_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static gint
default_metric_get_marks (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint maxchars)
{
(void) marks;
(void) lower;
(void) upper;
(void) maxchars;
return 0;
}
static const GtkCustomMetric default_metric = {
1.0,
default_metric_get_marks
};
static GtkWidgetClass *parent_class;
GType gtk_custom_ruler_get_type (void)
{
static GType ruler_type = 0;
if (!ruler_type)
{
static const GTypeInfo ruler_info =
{
sizeof (GtkCustomRulerClass),
(GBaseInitFunc) NULL, /* base_init */
(GBaseFinalizeFunc) NULL, /* base_finalize */
(GClassInitFunc) gtk_custom_ruler_class_init,
(GClassFinalizeFunc) NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkCustomRuler),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_custom_ruler_init,
NULL /* value_table */
};
ruler_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkCustomRuler",
&ruler_info, 0);
}
return ruler_type;
}
static void
gtk_custom_ruler_class_init (GtkCustomRulerClass * class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = (GObjectClass *) class;
widget_class = (GtkWidgetClass*) class;
parent_class = g_type_class_peek_parent (class);
gobject_class->set_property = gtk_custom_ruler_set_property;
gobject_class->get_property = gtk_custom_ruler_get_property;
widget_class->realize = gtk_custom_ruler_realize;
widget_class->unrealize = gtk_custom_ruler_unrealize;
widget_class->size_allocate = gtk_custom_ruler_size_allocate;
widget_class->expose_event = gtk_custom_ruler_expose;
class->draw_ticks = NULL;
class->draw_pos = NULL;
g_object_class_install_property (gobject_class,
PROP_LOWER,
g_param_spec_double ("lower",
_("Lower"),
_("Lower limit of ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_UPPER,
g_param_spec_double ("upper",
_("Upper"),
_("Upper limit of ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_POSITION,
g_param_spec_double ("position",
_("Position"),
_("Position of mark on the ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_MAX_SIZE,
g_param_spec_double ("max_size",
_("Max Size"),
_("Maximum size of the ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SHOW_POSITION,
g_param_spec_boolean ("show_position",
_("Show Position"),
_("Draw current ruler position"),
TRUE,
G_PARAM_READWRITE));
}
static void
gtk_custom_ruler_init (GtkCustomRuler * ruler)
{
ruler->backing_store = NULL;
ruler->non_gr_exp_gc = NULL;
ruler->xsrc = 0;
ruler->ysrc = 0;
ruler->slider_size = 0;
ruler->lower = 0;
ruler->upper = 0;
ruler->position = 0;
ruler->max_size = 0;
ruler->show_position = FALSE;
gtk_custom_ruler_set_metric (ruler, NULL);
}
static void
gtk_custom_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
(void) pspec;
GtkCustomRuler *ruler = GTK_CUSTOM_RULER (object);
switch (prop_id)
{
case PROP_LOWER:
gtk_custom_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,
ruler->position, ruler->max_size);
break;
case PROP_UPPER:
gtk_custom_ruler_set_range (ruler, ruler->lower, g_value_get_double (value),
ruler->position, ruler->max_size);
break;
case PROP_POSITION:
gtk_custom_ruler_set_range (ruler, ruler->lower, ruler->upper,
g_value_get_double (value), ruler->max_size);
break;
case PROP_MAX_SIZE:
gtk_custom_ruler_set_range (ruler, ruler->lower, ruler->upper,
ruler->position, g_value_get_double (value));
break;
case PROP_SHOW_POSITION:
gtk_custom_ruler_set_show_position (ruler, g_value_get_boolean (value));
break;
}
}
static void
gtk_custom_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCustomRuler *ruler = GTK_CUSTOM_RULER (object);
switch (prop_id)
{
case PROP_LOWER:
g_value_set_double (value, ruler->lower);
break;
case PROP_UPPER:
g_value_set_double (value, ruler->upper);
break;
case PROP_POSITION:
g_value_set_double (value, ruler->position);
break;
case PROP_MAX_SIZE:
g_value_set_double (value, ruler->max_size);
break;
case PROP_SHOW_POSITION:
g_value_set_boolean (value, ruler->show_position);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
gtk_custom_ruler_set_metric (GtkCustomRuler * ruler, GtkCustomMetric * metric)
{
g_return_if_fail (ruler != NULL);
g_return_if_fail (GTK_IS_CUSTOM_RULER (ruler));
if (metric == NULL)
ruler->metric = (GtkCustomMetric *) & default_metric;
else
ruler->metric = metric;
if (GTK_WIDGET_DRAWABLE (ruler))
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
void
gtk_custom_ruler_set_range (GtkCustomRuler *ruler,
gdouble lower,
gdouble upper,
gdouble position,
gdouble max_size)
{
g_return_if_fail (GTK_IS_CUSTOM_RULER (ruler));
g_object_freeze_notify (G_OBJECT (ruler));
if (ruler->lower != lower)
{
ruler->lower = lower;
g_object_notify (G_OBJECT (ruler), "lower");
}
if (ruler->upper != upper)
{
ruler->upper = upper;
g_object_notify (G_OBJECT (ruler), "upper");
}
if (ruler->position != position)
{
ruler->position = position;
g_object_notify (G_OBJECT (ruler), "position");
}
if (ruler->max_size != max_size)
{
ruler->max_size = max_size;
g_object_notify (G_OBJECT (ruler), "max-size");
}
g_object_thaw_notify (G_OBJECT (ruler));
if (GTK_WIDGET_DRAWABLE (ruler))
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
/**
* gtk_custom_ruler_get_range:
* @ruler: a #GtkCustomRuler
* @lower: location to store lower limit of the ruler, or %NULL
* @upper: location to store upper limit of the ruler, or %NULL
* @position: location to store the current position of the mark on the ruler, or %NULL
* @max_size: location to store the maximum size of the ruler used when calculating
* the space to leave for the text, or %NULL.
*
* Retrieves values indicating the range and current position of a #GtkCustomRuler.
* See gtk_custom_ruler_set_range().
**/
void
gtk_custom_ruler_get_range (GtkCustomRuler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *position,
gdouble *max_size)
{
g_return_if_fail (GTK_IS_CUSTOM_RULER (ruler));
if (lower)
*lower = ruler->lower;
if (upper)
*upper = ruler->upper;
if (position)
*position = ruler->position;
if (max_size)
*max_size = ruler->max_size;
}
void
gtk_custom_ruler_draw_ticks (GtkCustomRuler * ruler)
{
g_return_if_fail (GTK_IS_CUSTOM_RULER (ruler));
if (GTK_CUSTOM_RULER_GET_CLASS (ruler)->draw_ticks)
GTK_CUSTOM_RULER_GET_CLASS (ruler)->draw_ticks (ruler);
}
void
gtk_custom_ruler_draw_pos (GtkCustomRuler * ruler)
{
g_return_if_fail (GTK_IS_CUSTOM_RULER (ruler));
if (GTK_CUSTOM_RULER_GET_CLASS (ruler)->draw_pos && ruler->show_position)
GTK_CUSTOM_RULER_GET_CLASS (ruler)->draw_pos (ruler);
}
static void
gtk_custom_ruler_realize (GtkWidget * widget)
{
GtkCustomRuler *ruler;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_CUSTOM_RULER (widget));
ruler = GTK_CUSTOM_RULER (widget);
GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_EXPOSURE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
gdk_window_set_user_data (widget->window, ruler);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
gtk_custom_ruler_make_pixmap (ruler);
}
static void
gtk_custom_ruler_unrealize (GtkWidget *widget)
{
GtkCustomRuler *ruler = GTK_CUSTOM_RULER (widget);
if (ruler->backing_store)
g_object_unref (ruler->backing_store);
if (ruler->non_gr_exp_gc)
g_object_unref (ruler->non_gr_exp_gc);
ruler->backing_store = NULL;
ruler->non_gr_exp_gc = NULL;
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_custom_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkCustomRuler *ruler = GTK_CUSTOM_RULER (widget);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_custom_ruler_make_pixmap (ruler);
}
}
static gint
gtk_custom_ruler_expose (GtkWidget * widget, GdkEventExpose * event)
{
GtkCustomRuler *ruler;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_CUSTOM_RULER (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (GTK_WIDGET_DRAWABLE (widget)) {
ruler = GTK_CUSTOM_RULER (widget);
gtk_custom_ruler_draw_ticks (ruler);
gdk_draw_drawable (widget->window,
ruler->non_gr_exp_gc,
GDK_DRAWABLE(ruler->backing_store), 0, 0, 0, 0, widget->allocation.width, widget->allocation.height);
gtk_custom_ruler_draw_pos (ruler);
}
return FALSE;
}
static void
gtk_custom_ruler_make_pixmap (GtkCustomRuler *ruler)
{
GtkWidget *widget;
gint width;
gint height;
widget = GTK_WIDGET (ruler);
if (ruler->backing_store)
{
gdk_drawable_get_size (ruler->backing_store, &width, &height);
if ((width == widget->allocation.width) &&
(height == widget->allocation.height))
return;
g_object_unref (ruler->backing_store);
}
ruler->backing_store = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
ruler->xsrc = 0;
ruler->ysrc = 0;
if (!ruler->non_gr_exp_gc)
{
ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);
}
}
void
gtk_custom_ruler_set_show_position (GtkCustomRuler * ruler, gboolean yn)
{
ruler->show_position = yn;
}