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gtk2/gtk/gtkprogress.c
Elliot Lee 060978e069 I submitted this patch twice to gtk-devel-list, and received no comments, 
I submitted this patch twice to gtk-devel-list, and received no comments, so
am committing it.  Although not exhaustively tested, I have been using this
gtk+ for a week w/o problems, and I did read the code to ensure that nothing
ever writes to these data structures. If by chance people encounter SEGV's in
gtk+ code that is setting values in global data structures, this patch could
be a possible culprit.

1998-11-30  Elliot Lee  <sopwith@cuc.ml.org>

	* {gdk,gtk}/*.c: Make read-only data structures "static const" to
	allow them to be shared, mainly including (but not limited to) the
	GtkTypeInfo structures for each class.

	* gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
1998-11-30 19:07:15 +00:00

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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.
*/
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "gtkprogress.h"
#include "gtksignal.h"
#define EPSILON 1e-5
enum {
ARG_0,
ARG_ACTIVITY_MODE,
ARG_SHOW_TEXT,
ARG_TEXT_XALIGN,
ARG_TEXT_YALIGN
};
static void gtk_progress_class_init (GtkProgressClass *klass);
static void gtk_progress_init (GtkProgress *progress);
static void gtk_progress_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_progress_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_progress_destroy (GtkObject *object);
static void gtk_progress_finalize (GtkObject *object);
static void gtk_progress_realize (GtkWidget *widget);
static gint gtk_progress_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_progress_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_progress_create_pixmap (GtkProgress *progress);
static GtkWidgetClass *parent_class = NULL;
GtkType
gtk_progress_get_type (void)
{
static GtkType progress_type = 0;
if (!progress_type)
{
static const GtkTypeInfo progress_info =
{
"GtkProgress",
sizeof (GtkProgress),
sizeof (GtkProgressClass),
(GtkClassInitFunc) gtk_progress_class_init,
(GtkObjectInitFunc) gtk_progress_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
progress_type = gtk_type_unique (GTK_TYPE_WIDGET, &progress_info);
}
return progress_type;
}
static void
gtk_progress_class_init (GtkProgressClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass *) class;
widget_class = (GtkWidgetClass *) class;
parent_class = gtk_type_class (GTK_TYPE_WIDGET);
gtk_object_add_arg_type ("GtkProgress::activity_mode",
GTK_TYPE_BOOL,
GTK_ARG_READWRITE,
ARG_ACTIVITY_MODE);
gtk_object_add_arg_type ("GtkProgress::show_text",
GTK_TYPE_BOOL,
GTK_ARG_READWRITE,
ARG_SHOW_TEXT);
gtk_object_add_arg_type ("GtkProgress::text_xalign",
GTK_TYPE_FLOAT,
GTK_ARG_READWRITE,
ARG_TEXT_XALIGN);
gtk_object_add_arg_type ("GtkProgress::text_yalign",
GTK_TYPE_FLOAT,
GTK_ARG_READWRITE,
ARG_TEXT_YALIGN);
object_class->set_arg = gtk_progress_set_arg;
object_class->get_arg = gtk_progress_get_arg;
object_class->destroy = gtk_progress_destroy;
object_class->finalize = gtk_progress_finalize;
widget_class->realize = gtk_progress_realize;
widget_class->expose_event = gtk_progress_expose;
widget_class->size_allocate = gtk_progress_size_allocate;
/* to be overridden */
class->paint = NULL;
class->update = NULL;
class->act_mode_enter = NULL;
}
static void
gtk_progress_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkProgress *progress;
progress = GTK_PROGRESS (object);
switch (arg_id)
{
case ARG_ACTIVITY_MODE:
gtk_progress_set_activity_mode (progress, GTK_VALUE_BOOL (*arg));
break;
case ARG_SHOW_TEXT:
gtk_progress_set_show_text (progress, GTK_VALUE_BOOL (*arg));
break;
case ARG_TEXT_XALIGN:
gtk_progress_set_text_alignment (progress, GTK_VALUE_FLOAT (*arg), progress->y_align);
break;
case ARG_TEXT_YALIGN:
gtk_progress_set_text_alignment (progress, progress->x_align, GTK_VALUE_FLOAT (*arg));
break;
default:
break;
}
}
static void
gtk_progress_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkProgress *progress;
progress = GTK_PROGRESS (object);
switch (arg_id)
{
case ARG_ACTIVITY_MODE:
GTK_VALUE_BOOL (*arg) = (progress->activity_mode != 0);
break;
case ARG_SHOW_TEXT:
GTK_VALUE_BOOL (*arg) = (progress->show_text != 0);
break;
case ARG_TEXT_XALIGN:
GTK_VALUE_FLOAT (*arg) = progress->x_align;
break;
case ARG_TEXT_YALIGN:
GTK_VALUE_FLOAT (*arg) = progress->y_align;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gtk_progress_init (GtkProgress *progress)
{
progress->adjustment = NULL;
progress->offscreen_pixmap = NULL;
progress->format = g_strdup ("%P %%");
progress->x_align = 0.5;
progress->y_align = 0.5;
progress->show_text = FALSE;
progress->activity_mode = FALSE;
}
static void
gtk_progress_realize (GtkWidget *widget)
{
GtkProgress *progress;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_PROGRESS (widget));
progress = GTK_PROGRESS (widget);
GTK_WIDGET_SET_FLAGS (widget, 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;
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, progress);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
gtk_progress_create_pixmap (progress);
}
static void
gtk_progress_destroy (GtkObject *object)
{
GtkProgress *progress;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_PROGRESS (object));
progress = GTK_PROGRESS (object);
if (progress->adjustment)
gtk_signal_disconnect_by_data (GTK_OBJECT (progress->adjustment),
progress);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gtk_progress_finalize (GtkObject *object)
{
GtkProgress *progress;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_PROGRESS (object));
progress = GTK_PROGRESS (object);
if (progress->adjustment)
gtk_object_unref (GTK_OBJECT (GTK_PROGRESS (object)->adjustment));
if (progress->offscreen_pixmap)
gdk_pixmap_unref (progress->offscreen_pixmap);
if (progress->format)
g_free (progress->format);
GTK_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint
gtk_progress_expose (GtkWidget *widget,
GdkEventExpose *event)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_PROGRESS (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (GTK_WIDGET_DRAWABLE (widget))
gdk_draw_pixmap (widget->window,
widget->style->black_gc,
GTK_PROGRESS (widget)->offscreen_pixmap,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width,
event->area.height);
return FALSE;
}
static void
gtk_progress_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_PROGRESS (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_progress_create_pixmap (GTK_PROGRESS (widget));
}
}
static void
gtk_progress_create_pixmap (GtkProgress *progress)
{
GtkWidget *widget;
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (GTK_WIDGET_REALIZED (progress))
{
widget = GTK_WIDGET (progress);
if (progress->offscreen_pixmap)
gdk_pixmap_unref (progress->offscreen_pixmap);
progress->offscreen_pixmap = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
GTK_PROGRESS_CLASS (GTK_OBJECT (progress)->klass)->paint (progress);
}
}
static void
gtk_progress_value_changed (GtkAdjustment *adjustment,
GtkProgress *progress)
{
GTK_PROGRESS_CLASS (GTK_OBJECT (progress)->klass)->update (progress);
}
static gchar *
gtk_progress_build_string (GtkProgress *progress,
gfloat value,
gfloat percentage)
{
gchar buf[256] = { 0 };
gchar tmp[256] = { 0 };
gchar *src;
gchar *dest;
gchar fmt[10];
src = progress->format;
dest = buf;
while (src && *src)
{
if (*src != '%')
{
*dest = *src;
dest++;
}
else
{
gchar c;
gint digits;
c = *(src + sizeof(gchar));
digits = 0;
if (c >= '0' && c <= '2')
{
digits = (gint) (c - '0');
src++;
c = *(src + sizeof(gchar));
}
switch (c)
{
case '%':
*dest = '%';
src++;
dest++;
break;
case 'p':
case 'P':
if (digits)
{
sprintf (fmt, "%%.%df", digits);
sprintf (tmp, fmt, 100 * percentage);
}
else
sprintf (tmp, "%.0f", 100 * percentage);
strcat (buf, tmp);
dest = &(buf[strlen (buf)]);
src++;
break;
case 'v':
case 'V':
if (digits)
{
sprintf (fmt, "%%.%df", digits);
sprintf (tmp, fmt, value);
}
else
sprintf (tmp, "%.0f", value);
strcat (buf, tmp);
dest = &(buf[strlen (buf)]);
src++;
break;
case 'l':
case 'L':
if (digits)
{
sprintf (fmt, "%%.%df", digits);
sprintf (tmp, fmt, progress->adjustment->lower);
}
else
sprintf (tmp, "%.0f", progress->adjustment->lower);
strcat (buf, tmp);
dest = &(buf[strlen (buf)]);
src++;
break;
case 'u':
case 'U':
if (digits)
{
sprintf (fmt, "%%.%df", digits);
sprintf (tmp, fmt, progress->adjustment->upper);
}
else
sprintf (tmp, "%.0f", progress->adjustment->upper);
strcat (buf, tmp);
dest = &(buf[strlen (buf)]);
src++;
break;
default:
break;
}
}
src++;
}
return g_strdup (buf);
}
/***************************************************************/
void
gtk_progress_set_adjustment (GtkProgress *progress,
GtkAdjustment *adjustment)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
else
adjustment = (GtkAdjustment*) gtk_adjustment_new (0, 0, 100, 0, 0, 0);
if (progress->adjustment != adjustment)
{
if (progress->adjustment)
{
gtk_signal_disconnect_by_data (GTK_OBJECT (progress->adjustment),
(gpointer) progress);
gtk_object_unref (GTK_OBJECT (progress->adjustment));
}
progress->adjustment = adjustment;
if (adjustment)
{
gtk_object_ref (GTK_OBJECT (adjustment));
gtk_object_sink (GTK_OBJECT (adjustment));
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) gtk_progress_value_changed,
(gpointer) progress);
}
}
}
void
gtk_progress_configure (GtkProgress *progress,
gfloat value,
gfloat min,
gfloat max)
{
GtkAdjustment *adj;
gboolean changed = FALSE;
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
g_return_if_fail (min <= max);
g_return_if_fail (value >= min && value <= max);
adj = progress->adjustment;
if (fabs (adj->lower - min) > EPSILON || fabs (adj->upper - max) > EPSILON)
changed = TRUE;
adj->value = value;
adj->lower = min;
adj->upper = max;
gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
if (changed)
gtk_signal_emit_by_name (GTK_OBJECT (progress->adjustment), "changed");
}
void
gtk_progress_set_percentage (GtkProgress *progress,
gfloat percentage)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
g_return_if_fail (percentage >= 0 && percentage <= 1.0);
gtk_progress_set_value (progress, progress->adjustment->lower + percentage *
(progress->adjustment->upper - progress->adjustment->lower));
}
gfloat
gtk_progress_get_current_percentage (GtkProgress *progress)
{
g_return_val_if_fail (progress != NULL, 0);
g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);
return (progress->adjustment->value - progress->adjustment->lower) /
(progress->adjustment->upper - progress->adjustment->lower);
}
gfloat
gtk_progress_get_percentage_from_value (GtkProgress *progress,
gfloat value)
{
g_return_val_if_fail (progress != NULL, 0);
g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);
if (value >= progress->adjustment->lower &&
value <= progress->adjustment->upper)
return (value - progress->adjustment->lower) /
(progress->adjustment->upper - progress->adjustment->lower);
else
return 0.0;
}
void
gtk_progress_set_value (GtkProgress *progress,
gfloat value)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (fabs (progress->adjustment->value - value) > EPSILON)
gtk_adjustment_set_value (progress->adjustment, value);
}
gfloat
gtk_progress_get_value (GtkProgress *progress)
{
g_return_val_if_fail (progress != NULL, 0);
g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);
return progress->adjustment->value;
}
void
gtk_progress_set_show_text (GtkProgress *progress,
gint show_text)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (progress->show_text != show_text)
{
progress->show_text = show_text;
if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
gtk_widget_queue_resize (GTK_WIDGET (progress));
}
}
void
gtk_progress_set_text_alignment (GtkProgress *progress,
gfloat x_align,
gfloat y_align)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
g_return_if_fail (x_align >= 0.0 && x_align <= 1.0);
g_return_if_fail (y_align >= 0.0 && y_align <= 1.0);
if (progress->x_align != x_align || progress->y_align != y_align)
{
progress->x_align = x_align;
progress->y_align = y_align;
if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
gtk_widget_queue_resize (GTK_WIDGET (progress));
}
}
void
gtk_progress_set_format_string (GtkProgress *progress,
gchar *format)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (format)
{
if (progress->format)
g_free (progress->format);
progress->format = g_strdup (format);
if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
gtk_widget_queue_resize (GTK_WIDGET (progress));
}
}
gchar *
gtk_progress_get_current_text (GtkProgress *progress)
{
g_return_val_if_fail (progress != NULL, 0);
g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);
return gtk_progress_build_string (progress, progress->adjustment->value,
gtk_progress_get_current_percentage (progress));
}
gchar *
gtk_progress_get_text_from_value (GtkProgress *progress,
gfloat value)
{
g_return_val_if_fail (progress != NULL, 0);
g_return_val_if_fail (GTK_IS_PROGRESS (progress), 0);
return gtk_progress_build_string (progress, value,
gtk_progress_get_percentage_from_value (progress, value));
}
void
gtk_progress_set_activity_mode (GtkProgress *progress,
guint activity_mode)
{
g_return_if_fail (progress != NULL);
g_return_if_fail (GTK_IS_PROGRESS (progress));
if (progress->activity_mode != (activity_mode != 0))
{
progress->activity_mode = (activity_mode != 0);
if (progress->activity_mode)
GTK_PROGRESS_CLASS
(GTK_OBJECT (progress)->klass)->act_mode_enter (progress);
if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (progress)))
gtk_widget_queue_resize (GTK_WIDGET (progress));
}
}
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