/* LIBGTK - The GTK Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* .
*/
#include "config.h"
#include "claws-features.h"
#include
#include
#include
#include "gtkutils.h"
#include "gtkshruler.h"
#include "gtkunit.h"
#define ROUND(x) ((int) ((x) + 0.5))
/**
* SECTION: gimpparam
* @title: gimpparam
* @short_description: Definitions of useful #GParamFlags.
*
* Definitions of useful #GParamFlags.
**/
/**
* GTK_PARAM_STATIC_STRINGS:
*
* Since: GTK 2.4
**/
#define GTK_PARAM_STATIC_STRINGS (G_PARAM_STATIC_NAME | \
G_PARAM_STATIC_NICK | \
G_PARAM_STATIC_BLURB)
/**
* GTK_PARAM_READABLE:
*
* Since: GTK 2.4
**/
#define GTK_PARAM_READABLE (G_PARAM_READABLE | \
GTK_PARAM_STATIC_STRINGS)
/**
* GTK_PARAM_WRITABLE:
*
* Since: GTK 2.4
**/
#define GTK_PARAM_WRITABLE (G_PARAM_WRITABLE | \
GTK_PARAM_STATIC_STRINGS)
/**
* GTK_PARAM_READWRITE:
*
* Since: GTK 2.4
**/
#define GTK_PARAM_READWRITE (G_PARAM_READWRITE | \
GTK_PARAM_STATIC_STRINGS)
/**
* SECTION: gimpruler
* @title: GtkSHRuler
* @short_description: A ruler widget with configurable unit and orientation.
*
* A ruler widget with configurable unit and orientation.
**/
#define DEFAULT_RULER_FONT_SCALE PANGO_SCALE_SMALL
#define MINIMUM_INCR 5
enum
{
PROP_0,
PROP_ORIENTATION,
PROP_UNIT,
PROP_LOWER,
PROP_UPPER,
PROP_POSITION,
PROP_MAX_SIZE
};
/* All distances below are in 1/72nd's of an inch. (According to
* Adobe that's a point, but points are really 1/72.27 in.)
*/
typedef struct
{
GtkOrientation orientation;
GtkCMUnit unit;
gdouble lower;
gdouble upper;
gdouble position;
gdouble max_size;
GdkWindow *input_window;
cairo_surface_t *backing_store;
PangoLayout *layout;
gdouble font_scale;
gint xsrc;
gint ysrc;
} GtkSHRulerPrivate;
#define GTK_SHRULER_GET_PRIVATE(ruler) \
G_TYPE_INSTANCE_GET_PRIVATE (ruler, GTK_TYPE_SHRULER, GtkSHRulerPrivate)
static const struct
{
const gdouble ruler_scale[16];
const gint subdivide[3];
} ruler_metric =
{
{ 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
{ 1, 5, 10 }
};
static void gtk_shruler_dispose (GObject *object);
static void gtk_shruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_shruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_shruler_realize (GtkWidget *widget);
static void gtk_shruler_unrealize (GtkWidget *widget);
static void gtk_shruler_map (GtkWidget *widget);
static void gtk_shruler_unmap (GtkWidget *widget);
static void gtk_shruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_shruler_get_preferred_height (GtkWidget *widget,
gint *minimal_height,
gint *natural_height);
static void gtk_shruler_get_preferred_width (GtkWidget *widget,
gint *minimal_width,
gint *natural_width);
static void gtk_shruler_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_shruler_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static gboolean gtk_shruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_shruler_expose (GtkWidget *widget,
cairo_t *cr);
static void gtk_shruler_draw_ticks (GtkSHRuler *ruler);
static void gtk_shruler_make_pixmap (GtkSHRuler *ruler);
static PangoLayout * gtk_shruler_get_layout (GtkWidget *widget,
const gchar *text);
G_DEFINE_TYPE_WITH_CODE (GtkSHRuler, gtk_shruler, GTK_TYPE_WIDGET,
G_ADD_PRIVATE(GtkSHRuler))
#define parent_class gtk_shruler_parent_class
static void
gtk_shruler_class_init (GtkSHRulerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = gtk_shruler_dispose;
object_class->set_property = gtk_shruler_set_property;
object_class->get_property = gtk_shruler_get_property;
widget_class->realize = gtk_shruler_realize;
widget_class->unrealize = gtk_shruler_unrealize;
widget_class->map = gtk_shruler_map;
widget_class->unmap = gtk_shruler_unmap;
widget_class->size_allocate = gtk_shruler_size_allocate;
widget_class->get_preferred_width = gtk_shruler_get_preferred_width;
widget_class->get_preferred_height = gtk_shruler_get_preferred_height;
widget_class->style_set = gtk_shruler_style_set;
widget_class->motion_notify_event = gtk_shruler_motion_notify;
widget_class->draw = gtk_shruler_expose;
g_object_class_install_property (object_class,
PROP_ORIENTATION,
g_param_spec_enum ("orientation",
"Orientation",
"The orientation of the ruler",
GTK_TYPE_ORIENTATION,
GTK_ORIENTATION_HORIZONTAL,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_LOWER,
gtk_param_spec_unit ("unit",
"Unit",
"Unit of ruler",
TRUE, TRUE,
CM_UNIT_PIXEL,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_LOWER,
g_param_spec_double ("lower",
"Lower",
"Lower limit of ruler",
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_UPPER,
g_param_spec_double ("upper",
"Upper",
"Upper limit of ruler",
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_POSITION,
g_param_spec_double ("position",
"Position",
"Position of mark on the ruler",
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_MAX_SIZE,
g_param_spec_double ("max-size",
"Max Size",
"Maximum size of the ruler",
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_double ("font-scale",
NULL, NULL,
0.0,
G_MAXDOUBLE,
DEFAULT_RULER_FONT_SCALE,
GTK_PARAM_READABLE));
}
static void
gtk_shruler_init (GtkSHRuler *ruler)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
gtk_widget_set_has_window (GTK_WIDGET (ruler), FALSE);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->unit = 0;
priv->lower = 0;
priv->upper = 0;
priv->position = 0;
priv->max_size = 0;
priv->backing_store = NULL;
priv->font_scale = DEFAULT_RULER_FONT_SCALE;
}
static void
gtk_shruler_dispose (GObject *object)
{
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gtk_shruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkSHRuler *ruler = GTK_SHRULER (object);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
priv->orientation = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (ruler));
break;
case PROP_UNIT:
gtk_shruler_set_unit (ruler, g_value_get_int (value));
break;
case PROP_LOWER:
gtk_shruler_set_range (ruler,
g_value_get_double (value),
priv->upper,
priv->max_size);
break;
case PROP_UPPER:
gtk_shruler_set_range (ruler,
priv->lower,
g_value_get_double (value),
priv->max_size);
break;
case PROP_POSITION:
gtk_shruler_set_position (ruler, g_value_get_double (value));
break;
case PROP_MAX_SIZE:
gtk_shruler_set_range (ruler,
priv->lower,
priv->upper,
g_value_get_double (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_shruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkSHRuler *ruler = GTK_SHRULER (object);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_UNIT:
g_value_set_int (value, priv->unit);
break;
case PROP_LOWER:
g_value_set_double (value, priv->lower);
break;
case PROP_UPPER:
g_value_set_double (value, priv->upper);
break;
case PROP_POSITION:
g_value_set_double (value, priv->position);
break;
case PROP_MAX_SIZE:
g_value_set_double (value, priv->max_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_shruler_new:
* @orientation: the ruler's orientation.
*
* Creates a new ruler.
*
* Return value: a new #GtkSHRuler widget.
*
* Since: GTK 2.8
**/
GtkWidget *
gtk_shruler_new (GtkOrientation orientation)
{
return g_object_new (GTK_TYPE_SHRULER,
"orientation", orientation,
NULL);
}
static void
gtk_shruler_update_position (GtkSHRuler *ruler,
gdouble x,
gdouble y)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gdouble lower;
gdouble upper;
gtk_widget_get_allocation (GTK_WIDGET (ruler), &allocation);
gtk_shruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_shruler_set_position (ruler,
lower +
(upper - lower) * x / allocation.width);
}
else
{
gtk_shruler_set_position (ruler,
lower +
(upper - lower) * y / allocation.height);
}
}
/**
* gtk_shruler_set_unit:
* @ruler: a #GtkSHRuler
* @unit: the #GtkCMUnit to set the ruler to
*
* This sets the unit of the ruler.
*
* Since: GTK 2.8
*/
void
gtk_shruler_set_unit (GtkSHRuler *ruler,
GtkCMUnit unit)
{
GtkSHRulerPrivate *priv;
g_return_if_fail (GTK_IS_SHRULER (ruler));
priv = GTK_SHRULER_GET_PRIVATE (ruler);
if (priv->unit != unit)
{
priv->unit = unit;
g_object_notify (G_OBJECT (ruler), "unit");
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
}
/**
* gtk_shruler_get_unit:
* @ruler: a #GtkSHRuler
*
* Return value: the unit currently used in the @ruler widget.
*
* Since: GTK 2.8
**/
GtkCMUnit
gtk_shruler_get_unit (GtkSHRuler *ruler)
{
g_return_val_if_fail (GTK_IS_SHRULER (ruler), 0);
return GTK_SHRULER_GET_PRIVATE (ruler)->unit;
}
/**
* gtk_shruler_set_position:
* @ruler: a #GtkSHRuler
* @position: the position to set the ruler to
*
* This sets the position of the ruler.
*
* Since: GTK 2.8
*/
void
gtk_shruler_set_position (GtkSHRuler *ruler,
gdouble position)
{
GtkSHRulerPrivate *priv;
g_return_if_fail (GTK_IS_SHRULER (ruler));
priv = GTK_SHRULER_GET_PRIVATE (ruler);
if (priv->position != position)
{
priv->position = position;
g_object_notify (G_OBJECT (ruler), "position");
}
}
/**
* gtk_shruler_get_position:
* @ruler: a #GtkSHRuler
*
* Return value: the current position of the @ruler widget.
*
* Since: GTK 2.8
**/
gdouble
gtk_shruler_get_position (GtkSHRuler *ruler)
{
g_return_val_if_fail (GTK_IS_SHRULER (ruler), 0.0);
return GTK_SHRULER_GET_PRIVATE (ruler)->position;
}
/**
* gtk_shruler_set_range:
* @ruler: a #GtkSHRuler
* @lower: the lower limit of the ruler
* @upper: the upper limit of the ruler
* @max_size: the maximum size of the ruler used when calculating the space to
* leave for the text
*
* This sets the range of the ruler.
*
* Since: GTK 2.8
*/
void
gtk_shruler_set_range (GtkSHRuler *ruler,
gdouble lower,
gdouble upper,
gdouble max_size)
{
GtkSHRulerPrivate *priv;
g_return_if_fail (GTK_IS_SHRULER (ruler));
priv = GTK_SHRULER_GET_PRIVATE (ruler);
g_object_freeze_notify (G_OBJECT (ruler));
if (priv->lower != lower)
{
priv->lower = lower;
g_object_notify (G_OBJECT (ruler), "lower");
}
if (priv->upper != upper)
{
priv->upper = upper;
g_object_notify (G_OBJECT (ruler), "upper");
}
if (priv->max_size != max_size)
{
priv->max_size = max_size;
g_object_notify (G_OBJECT (ruler), "max-size");
}
g_object_thaw_notify (G_OBJECT (ruler));
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
/**
* gtk_shruler_get_range:
* @ruler: a #GtkSHRuler
* @lower: location to store lower limit of the ruler, or %NULL
* @upper: location to store upper limit of 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 #GtkSHRuler.
* See gtk_shruler_set_range().
*
* Since: GTK 2.8
**/
void
gtk_shruler_get_range (GtkSHRuler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *max_size)
{
GtkSHRulerPrivate *priv;
g_return_if_fail (GTK_IS_SHRULER (ruler));
priv = GTK_SHRULER_GET_PRIVATE (ruler);
if (lower)
*lower = priv->lower;
if (upper)
*upper = priv->upper;
if (max_size)
*max_size = priv->max_size;
}
static void
gtk_shruler_realize (GtkWidget *widget)
{
GtkSHRuler *ruler = GTK_SHRULER (widget);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
GdkWindowAttr attributes;
gint attributes_mask;
GTK_WIDGET_CLASS (gtk_shruler_parent_class)->realize (widget);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_ONLY;
attributes.event_mask = (gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
priv->input_window = gdk_window_new (gtk_widget_get_window (widget),
&attributes, attributes_mask);
gtk_widget_register_window (widget, priv->input_window);
gtk_shruler_make_pixmap (ruler);
}
static void
gtk_shruler_unrealize (GtkWidget *widget)
{
GtkSHRuler *ruler = GTK_SHRULER (widget);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
if (priv->backing_store)
{
cairo_surface_destroy (priv->backing_store);
priv->backing_store = NULL;
}
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
if (priv->input_window)
{
gtk_widget_unregister_window (widget, priv->input_window);
gdk_window_destroy (priv->input_window);
priv->input_window = NULL;
}
GTK_WIDGET_CLASS (gtk_shruler_parent_class)->unrealize (widget);
}
static void
gtk_shruler_map (GtkWidget *widget)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
GTK_WIDGET_CLASS (parent_class)->map (widget);
if (priv->input_window)
gdk_window_show (priv->input_window);
}
static void
gtk_shruler_unmap (GtkWidget *widget)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
if (priv->input_window)
gdk_window_hide (priv->input_window);
GTK_WIDGET_CLASS (parent_class)->unmap (widget);
}
static void
gtk_shruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkSHRuler *ruler = GTK_SHRULER (widget);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
{
gdk_window_move_resize (priv->input_window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_shruler_make_pixmap (ruler);
}
}
static void
gtk_shruler_get_preferred_width (GtkWidget *widget,
gint *minimal_width,
gint *natural_width)
{
GtkRequisition requisition;
gtk_shruler_size_request (widget, &requisition);
*minimal_width = *natural_width = requisition.width;
}
static void
gtk_shruler_get_preferred_height (GtkWidget *widget,
gint *minimal_height,
gint *natural_height)
{
GtkRequisition requisition;
gtk_shruler_size_request (widget, &requisition);
*minimal_height = *natural_height = requisition.height;
}
static void
gtk_shruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
GtkStyle *style = gtk_widget_get_style (widget);
PangoLayout *layout;
PangoRectangle ink_rect;
gint size;
layout = gtk_shruler_get_layout (widget, "0123456789");
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
size = 2 + ink_rect.height * 1.7;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
requisition->width = style->xthickness * 2 + 1;
requisition->height = style->ythickness * 2 + size;
}
else
{
requisition->width = style->xthickness * 2 + size;
requisition->height = style->ythickness * 2 + 1;
}
}
static void
gtk_shruler_style_set (GtkWidget *widget,
GtkStyle *prev_style)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
GTK_WIDGET_CLASS (gtk_shruler_parent_class)->style_set (widget, prev_style);
gtk_widget_style_get (widget,
"font-scale", &priv->font_scale,
NULL);
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
}
static gboolean
gtk_shruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkSHRuler *ruler = GTK_SHRULER (widget);
gdk_event_request_motions (event);
gtk_shruler_update_position (ruler, event->x, event->y);
return FALSE;
}
static gboolean
gtk_shruler_expose (GtkWidget *widget,
cairo_t *cr)
{
if (gtk_widget_is_drawable (widget))
{
GtkSHRuler *ruler = GTK_SHRULER (widget);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gtk_shruler_draw_ticks (ruler);
gtk_widget_get_allocation (widget, &allocation);
cairo_set_source_surface (cr, priv->backing_store, 0, 0);
cairo_paint (cr);
}
return FALSE;
}
static void
gtk_shruler_draw_ticks (GtkSHRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyle *style = gtk_widget_get_style (widget);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
GtkStateType state = gtk_widget_get_state (widget);
GtkAllocation allocation;
cairo_t *cr;
gint i;
gint width, height;
gint xthickness;
gint ythickness;
gint length;
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 start, end, cur;
gchar unit_str[32];
gint digit_height;
gint digit_offset;
gint text_size;
gint pos;
gdouble max_size;
GtkCMUnit unit;
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
xthickness = style->xthickness;
ythickness = style->ythickness;
layout = gtk_shruler_get_layout (widget, "0123456789");
pango_layout_get_extents (layout, &ink_rect, &logical_rect);
digit_height = PANGO_PIXELS (ink_rect.height) + 2;
digit_offset = ink_rect.y;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
}
else
{
width = allocation.height;
height = allocation.width - ythickness * 2;
}
cr = cairo_create (priv->backing_store);
gdk_cairo_set_source_color (cr, &style->bg[state]);
cairo_paint (cr);
gdk_cairo_set_source_color (cr, &style->fg[state]);
gtk_shruler_get_range (ruler, &lower, &upper, &max_size);
if ((upper - lower) == 0)
goto out;
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.
*
* We calculate the text size as for the vruler instead of
* actually measuring the text width, so that the result for the
* scale looks consistent with an accompanying vruler.
*/
scale = ceil (max_size);
g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
text_size = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_size)
break;
if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;
unit = gtk_shruler_get_unit (ruler);
/* drawing starts here */
length = 0;
for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
{
gdouble subd_incr;
/* hack to get proper subdivisions at full pixels */
if (unit == CM_UNIT_PIXEL && scale == 1 && i == 1)
subd_incr = 1.0;
else
subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
(gdouble) ruler_metric.subdivide[i]);
if (subd_incr * fabs (increment) <= MINIMUM_INCR)
continue;
/* don't subdivide pixels */
if (unit == CM_UNIT_PIXEL && subd_incr < 1.0)
continue;
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)
{
if (((int)cur) % 10 == 0)
length = height * 2 / 3;
else if (((int)cur) % 5 == 0)
length = height / 3;
else
length = height / 4;
pos = ROUND ((cur - lower) * increment);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
pos, height + ythickness - length,
1, length);
}
else
{
cairo_rectangle (cr,
height + xthickness - length, pos,
length, 1);
}
/* draw label */
if (i == 0 && ((int)cur) % 10 == 0)
{
g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
pango_layout_set_text (layout, unit_str, -1);
pango_layout_get_extents (layout, &logical_rect, NULL);
cairo_move_to (cr,
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
}
else
{
gint j;
for (j = 0; j < (int) strlen (unit_str); j++)
{
pango_layout_set_text (layout, unit_str + j, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
cairo_move_to (cr,
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
}
}
}
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
}
static void
gtk_shruler_make_pixmap (GtkSHRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
if (priv->backing_store)
cairo_surface_destroy (priv->backing_store);
priv->backing_store =
gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
allocation.width,
allocation.height);
}
static PangoLayout *
gtk_shruler_create_layout (GtkWidget *widget,
const gchar *text)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
PangoLayout *layout;
PangoAttrList *attrs;
PangoAttribute *attr;
layout = gtk_widget_create_pango_layout (widget, text);
attrs = pango_attr_list_new ();
attr = pango_attr_scale_new (priv->font_scale);
attr->start_index = 0;
attr->end_index = -1;
pango_attr_list_insert (attrs, attr);
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
return layout;
}
static PangoLayout *
gtk_shruler_get_layout (GtkWidget *widget,
const gchar *text)
{
GtkSHRulerPrivate *priv = GTK_SHRULER_GET_PRIVATE (widget);
if (priv->layout)
{
pango_layout_set_text (priv->layout, text, -1);
return priv->layout;
}
priv->layout = gtk_shruler_create_layout (widget, text);
return priv->layout;
}