gtk2/gtk/gtkvruler.c
Tim Janik ef03cb5287 s/refcount/ref_count/.
Sun Feb 13 08:54:45 2000  Tim Janik  <timj@gtk.org>

        * gdk/gdkcursor.h (struct _GdkCursor): s/refcount/ref_count/.
        * gdk/x11/gdkcursor-x11.c (gdk_cursor_new_from_pixmap):
        * gdk/x11/gdkcursor-x11.c (_gdk_cursor_destroy):
        * gdk/gdkcursor.c (gdk_cursor_ref): insert assertments for the
        parameters given and cursor->ref_count. coding style fixups.

        * gtk/gtksocket.c (gtk_socket_class_init): parent class is GtkContainer,
        not GtkWidget.

        * gtk/*.h: applied patch from Mathieu Lacage <lacage@email.enst.fr> to
        fix up widget macros and add _GET_CLASS() variant.

        * gtk/*.c: some GtkType fixups.
2000-02-13 08:16:48 +00:00

318 lines
8.5 KiB
C

/* 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/.
*/
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "gtkvruler.h"
#define RULER_WIDTH 14
#define MINIMUM_INCR 5
#define MAXIMUM_SUBDIVIDE 5
#define MAXIMUM_SCALES 10
#define ROUND(x) ((int) ((x) + 0.5))
static void gtk_vruler_class_init (GtkVRulerClass *klass);
static void gtk_vruler_init (GtkVRuler *vruler);
static gint gtk_vruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static void gtk_vruler_draw_ticks (GtkRuler *ruler);
static void gtk_vruler_draw_pos (GtkRuler *ruler);
GtkType
gtk_vruler_get_type (void)
{
static GtkType vruler_type = 0;
if (!vruler_type)
{
static const GtkTypeInfo vruler_info =
{
"GtkVRuler",
sizeof (GtkVRuler),
sizeof (GtkVRulerClass),
(GtkClassInitFunc) gtk_vruler_class_init,
(GtkObjectInitFunc) gtk_vruler_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
vruler_type = gtk_type_unique (GTK_TYPE_RULER, &vruler_info);
}
return vruler_type;
}
static void
gtk_vruler_class_init (GtkVRulerClass *klass)
{
GtkWidgetClass *widget_class;
GtkRulerClass *ruler_class;
widget_class = (GtkWidgetClass*) klass;
ruler_class = (GtkRulerClass*) klass;
widget_class->motion_notify_event = gtk_vruler_motion_notify;
ruler_class->draw_ticks = gtk_vruler_draw_ticks;
ruler_class->draw_pos = gtk_vruler_draw_pos;
}
static void
gtk_vruler_init (GtkVRuler *vruler)
{
GtkWidget *widget;
widget = GTK_WIDGET (vruler);
widget->requisition.width = widget->style->klass->xthickness * 2 + RULER_WIDTH;
widget->requisition.height = widget->style->klass->ythickness * 2 + 1;
}
GtkWidget*
gtk_vruler_new (void)
{
return GTK_WIDGET (gtk_type_new (GTK_TYPE_VRULER));
}
static gint
gtk_vruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkRuler *ruler;
gint y;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_VRULER (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
ruler = GTK_RULER (widget);
if (event->is_hint)
gdk_window_get_pointer (widget->window, NULL, &y, NULL);
else
y = event->y;
ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * y) / widget->allocation.height;
/* Make sure the ruler has been allocated already */
if (ruler->backing_store != NULL)
gtk_ruler_draw_pos (ruler);
return FALSE;
}
static void
gtk_vruler_draw_ticks (GtkRuler *ruler)
{
GtkWidget *widget;
GdkGC *gc, *bg_gc;
GdkFont *font;
gint i, j;
gint width, height;
gint xthickness;
gint ythickness;
gint length, ideal_length;
gfloat lower, upper; /* Upper and lower limits, in ruler units */
gfloat increment; /* Number of pixels per unit */
gint scale; /* Number of units per major unit */
gfloat subd_incr;
gfloat start, end, cur;
gchar unit_str[32];
gchar digit_str[2] = { '\0', '\0' };
gint digit_height;
gint text_height;
gint pos;
g_return_if_fail (ruler != NULL);
g_return_if_fail (GTK_IS_VRULER (ruler));
if (!GTK_WIDGET_DRAWABLE (ruler))
return;
widget = GTK_WIDGET (ruler);
gc = widget->style->fg_gc[GTK_STATE_NORMAL];
bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
font = widget->style->font;
xthickness = widget->style->klass->xthickness;
ythickness = widget->style->klass->ythickness;
digit_height = font->ascent; /* assume descent == 0 ? */
width = widget->allocation.height;
height = widget->allocation.width - ythickness * 2;
gtk_paint_box (widget->style, ruler->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget, "vruler",
0, 0,
widget->allocation.width, widget->allocation.height);
gdk_draw_line (ruler->backing_store, gc,
height + xthickness,
ythickness,
height + xthickness,
widget->allocation.height - ythickness);
upper = ruler->upper / ruler->metric->pixels_per_unit;
lower = ruler->lower / ruler->metric->pixels_per_unit;
if ((upper - lower) == 0)
return;
increment = (gfloat) width / (upper - lower);
/* determine the scale
* use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*/
scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);
sprintf (unit_str, "%d", scale);
text_height = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < MAXIMUM_SCALES; scale++)
if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_height)
break;
if (scale == MAXIMUM_SCALES)
scale = MAXIMUM_SCALES - 1;
/* drawing starts here */
length = 0;
for (i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--)
{
subd_incr = (gfloat) ruler->metric->ruler_scale[scale] /
(gfloat) ruler->metric->subdivide[i];
if (subd_incr * fabs(increment) <= MINIMUM_INCR)
continue;
/* Calculate the length of the tickmarks. Make sure that
* this length increases for each set of ticks
*/
ideal_length = height / (i + 1) - 1;
if (ideal_length > ++length)
length = ideal_length;
if (lower < upper)
{
start = floor (lower / subd_incr) * subd_incr;
end = ceil (upper / subd_incr) * subd_incr;
}
else
{
start = floor (upper / subd_incr) * subd_incr;
end = ceil (lower / subd_incr) * subd_incr;
}
for (cur = start; cur <= end; cur += subd_incr)
{
pos = ROUND ((cur - lower) * increment);
gdk_draw_line (ruler->backing_store, gc,
height + xthickness - length, pos,
height + xthickness, pos);
/* draw label */
if (i == 0)
{
sprintf (unit_str, "%d", (int) cur);
for (j = 0; j < (int) strlen (unit_str); j++)
{
digit_str[0] = unit_str[j];
gdk_draw_string (ruler->backing_store, font, gc,
xthickness + 1,
pos + digit_height * (j + 1) + 1,
digit_str);
}
}
}
}
}
static void
gtk_vruler_draw_pos (GtkRuler *ruler)
{
GtkWidget *widget;
GdkGC *gc;
int i;
gint x, y;
gint width, height;
gint bs_width, bs_height;
gint xthickness;
gint ythickness;
gfloat increment;
g_return_if_fail (ruler != NULL);
g_return_if_fail (GTK_IS_VRULER (ruler));
if (GTK_WIDGET_DRAWABLE (ruler))
{
widget = GTK_WIDGET (ruler);
gc = widget->style->fg_gc[GTK_STATE_NORMAL];
xthickness = widget->style->klass->xthickness;
ythickness = widget->style->klass->ythickness;
width = widget->allocation.width - xthickness * 2;
height = widget->allocation.height;
bs_height = width / 2;
bs_height |= 1; /* make sure it's odd */
bs_width = bs_height / 2 + 1;
if ((bs_width > 0) && (bs_height > 0))
{
/* If a backing store exists, restore the ruler */
if (ruler->backing_store && ruler->non_gr_exp_gc)
gdk_draw_pixmap (ruler->widget.window,
ruler->non_gr_exp_gc,
ruler->backing_store,
ruler->xsrc, ruler->ysrc,
ruler->xsrc, ruler->ysrc,
bs_width, bs_height);
increment = (gfloat) height / (ruler->upper - ruler->lower);
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((ruler->position - ruler->lower) * increment) + (ythickness - bs_height) / 2 - 1;
for (i = 0; i < bs_width; i++)
gdk_draw_line (widget->window, gc,
x + i, y + i,
x + i, y + bs_height - 1 - i);
ruler->xsrc = x;
ruler->ysrc = y;
}
}
}