* 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 1997-2000. 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>
static void gtk_vruler_draw_pos (GtkRuler *ruler);
-guint
+GtkType
gtk_vruler_get_type (void)
{
- static guint vruler_type = 0;
+ static GtkType vruler_type = 0;
if (!vruler_type)
{
- GtkTypeInfo vruler_info =
+ static const GtkTypeInfo vruler_info =
{
"GtkVRuler",
sizeof (GtkVRuler),
sizeof (GtkVRulerClass),
(GtkClassInitFunc) gtk_vruler_class_init,
(GtkObjectInitFunc) gtk_vruler_init,
- (GtkArgSetFunc) NULL,
- (GtkArgGetFunc) NULL,
+ /* reserved_1 */ NULL,
+ /* reserved_2 */ NULL,
+ (GtkClassInitFunc) NULL,
};
- vruler_type = gtk_type_unique (gtk_ruler_get_type (), &vruler_info);
+ vruler_type = gtk_type_unique (GTK_TYPE_RULER, &vruler_info);
}
return vruler_type;
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;
+ widget->requisition.width = widget->style->xthickness * 2 + RULER_WIDTH;
+ widget->requisition.height = widget->style->ythickness * 2 + 1;
}
GtkWidget*
gtk_vruler_new (void)
{
- return GTK_WIDGET (gtk_type_new (gtk_vruler_get_type ()));
+ return GTK_WIDGET (gtk_type_new (GTK_TYPE_VRULER));
}
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)
y = event->y;
ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * y) / widget->allocation.height;
+ g_object_notify (G_OBJECT (ruler), "position");
/* Make sure the ruler has been allocated already */
if (ruler->backing_store != NULL)
{
GtkWidget *widget;
GdkGC *gc, *bg_gc;
- GdkFont * font;
gint i, j;
gint width, height;
gint xthickness;
gint ythickness;
gint length, ideal_length;
- gfloat subd_incr;
- gfloat step_incr;
- gfloat increment;
- gfloat start, end, cur;
+ gdouble lower, upper; /* Upper and lower limits, in ruler units */
+ gdouble increment; /* Number of pixels per unit */
+ gint scale; /* Number of units per major unit */
+ gdouble subd_incr;
+ gdouble start, end, cur;
gchar unit_str[32];
- gchar digit_str[2] = { '\0', '\0' };
- gint text_height;
gint digit_height;
+ gint digit_offset;
+ gint text_height;
gint pos;
- gint scale;
-
- g_return_if_fail (ruler != NULL);
- g_return_if_fail (GTK_IS_VRULER (ruler));
-
- if (GTK_WIDGET_DRAWABLE (ruler))
+ PangoLayout *layout;
+ PangoRectangle logical_rect, ink_rect;
+
+ 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];
+
+ xthickness = widget->style->xthickness;
+ ythickness = widget->style->ythickness;
+
+ layout = gtk_widget_create_pango_layout (widget, "012456789");
+ pango_layout_get_extents (layout, &ink_rect, &logical_rect);
+
+ digit_height = PANGO_PIXELS (ink_rect.height) + 2;
+ digit_offset = ink_rect.y;
+
+ 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 = (gdouble) 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--)
{
- widget = GTK_WIDGET (ruler);
+ subd_incr = (gdouble) ruler->metric->ruler_scale[scale] /
+ (gdouble) ruler->metric->subdivide[i];
+ if (subd_incr * fabs(increment) <= MINIMUM_INCR)
+ continue;
- 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;
- gdk_draw_line (ruler->backing_store, gc,
- height + xthickness,
- ythickness,
- height + xthickness,
- widget->allocation.height - ythickness);
-
- if ((ruler->upper - ruler->lower) == 0)
- return;
-
- increment = (gfloat) width * ruler->metric->pixels_per_unit / (ruler->upper - ruler->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 as for the vertical ruler case. use this height to find a scale
- * which leaves sufficient room for drawing the ruler.
+ /* Calculate the length of the tickmarks. Make sure that
+ * this length increases for each set of ticks
*/
- 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] * increment > 2 * text_height)
- break;
+ ideal_length = height / (i + 1) - 1;
+ if (ideal_length > ++length)
+ length = ideal_length;
- if (scale == MAXIMUM_SCALES)
- scale = MAXIMUM_SCALES - 1;
-
- length = 0;
- for (i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--)
+ if (lower < upper)
+ {
+ start = floor (lower / subd_incr) * subd_incr;
+ end = ceil (upper / subd_incr) * subd_incr;
+ }
+ else
{
- subd_incr = (gfloat) ruler->metric->ruler_scale[scale] / (gfloat) ruler->metric->subdivide[i];
- step_incr = subd_incr * increment;
- if (step_incr <= MINIMUM_INCR)
- continue;
+ start = floor (upper / subd_incr) * subd_incr;
+ end = ceil (lower / subd_incr) * subd_incr;
+ }
- start = floor ((ruler->lower / ruler->metric->pixels_per_unit) / subd_incr) * subd_incr;
- end = ceil ((ruler->upper / ruler->metric->pixels_per_unit) / subd_incr) * subd_incr;
+ for (cur = start; cur <= end; cur += subd_incr)
+ {
+ pos = ROUND ((cur - lower) * increment);
- ideal_length = height / (i + 1) - 1;
- if (ideal_length > ++length)
- length = ideal_length;
+ gdk_draw_line (ruler->backing_store, gc,
+ height + xthickness - length, pos,
+ height + xthickness, pos);
- cur = start;
- while (cur <= end)
+ /* draw label */
+ if (i == 0)
{
- pos = ROUND ((cur - (ruler->lower / ruler->metric->pixels_per_unit)) * increment);
-
- gdk_draw_line (ruler->backing_store, gc,
- height + xthickness - length,
- pos,
- height + xthickness,
- pos);
-
- if (i == 0)
+ sprintf (unit_str, "%d", (int) cur);
+
+ for (j = 0; j < (int) strlen (unit_str); j++)
{
- sprintf (unit_str, "%d", (int) cur);
- for (j = 0; j < (int) strlen (unit_str); j++)
- {
- digit_str[0] = unit_str[j];
- gdk_draw_rectangle (ruler->backing_store,
- bg_gc, TRUE,
- xthickness + 1,
- pos + digit_height * j + 1,
- gdk_string_width(font, digit_str),
- digit_height);
- gdk_draw_string (ruler->backing_store, font, gc,
- xthickness + 1,
- pos + digit_height * (j + 1) + 1,
- digit_str);
- }
+ pango_layout_set_text (layout, unit_str + j, 1);
+ pango_layout_get_extents (layout, NULL, &logical_rect);
+
+
+ gtk_paint_layout (widget->style,
+ ruler->backing_store,
+ GTK_WIDGET_STATE (widget),
+ FALSE,
+ NULL,
+ widget,
+ "vruler",
+ xthickness + 1,
+ pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
+ layout);
}
-
- cur += subd_incr;
}
}
}
+
+ g_object_unref (G_OBJECT (layout));
}
+
static void
gtk_vruler_draw_pos (GtkRuler *ruler)
{
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));
+ gdouble increment;
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;
+ xthickness = widget->style->xthickness;
+ ythickness = widget->style->ythickness;
width = widget->allocation.width - xthickness * 2;
height = widget->allocation.height;
ruler->xsrc, ruler->ysrc,
bs_width, bs_height);
- increment = (gfloat) height / (ruler->upper - ruler->lower);
+ increment = (gdouble) height / (ruler->upper - ruler->lower);
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((ruler->position - ruler->lower) * increment) + (ythickness - bs_height) / 2 - 1;
projects / ~andy / gtk / blobdiff