#include <cstring>

#include <cmath>

#include <cstdio>

#include "widget-sizes.h"

#include "desktop-widget.h"

#include "ruler.h"

#include "unit-constants.h"

#include "round.h"

#include <glibmm/i18n.h>

#define GTK_PARAM_READWRITE G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB

#define MINIMUM_INCR 5

#define MAXIMUM_SUBDIVIDE 5

#define MAXIMUM_SCALES 10

#define ROUND(x) ((int) ((x) + 0.5))

enum {

PROP_0,

PROP_ORIENTATION,

PROP_LOWER,

PROP_UPPER,

PROP_POSITION,

PROP_MAX_SIZE,

PROP_METRIC

};

typedef struct _GtkDeprecatedRulerPrivate GtkDeprecatedRulerPrivate;

struct _GtkDeprecatedRulerPrivate

{

GtkOrientation orientation;

};

static void gtk_deprecated_ruler_set_property (GObject *object,

guint prop_id,

const GValue *value,

GParamSpec *pspec);

static void gtk_deprecated_ruler_get_property (GObject *object,

guint prop_id,

GValue *value,

GParamSpec *pspec);

static void gtk_deprecated_ruler_realize (GtkWidget *widget);

static void gtk_deprecated_ruler_unrealize (GtkWidget *widget);

static void gtk_deprecated_ruler_size_request (GtkWidget *widget,

GtkRequisition *requisition);

static void gtk_deprecated_ruler_size_allocate (GtkWidget *widget,

GtkAllocation *allocation);

static gboolean gtk_deprecated_ruler_motion_notify (GtkWidget *widget,

GdkEventMotion *event);

static gboolean gtk_deprecated_ruler_expose (GtkWidget *widget,

GdkEventExpose *event);

static void gtk_deprecated_ruler_make_pixmap (GtkDeprecatedRuler *ruler);

static void gtk_deprecated_ruler_real_draw_ticks (GtkDeprecatedRuler *ruler);

static void gtk_deprecated_ruler_real_draw_pos (GtkDeprecatedRuler *ruler);

static const GtkDeprecatedRulerMetric ruler_metrics[] =

{

{ "Pixel", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{ "Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},

{ "Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

};

#define GTK_DEPRECATED_RULER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_DEPRECATED_TYPE_RULER, GtkDeprecatedRulerPrivate))

G_DEFINE_TYPE_WITH_CODE (GtkDeprecatedRuler, gtk_deprecated_ruler, GTK_TYPE_WIDGET,

G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,

NULL))

static void

gtk_deprecated_ruler_class_init (GtkDeprecatedRulerClass *klass)

{

GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

gobject_class->set_property = gtk_deprecated_ruler_set_property;

gobject_class->get_property = gtk_deprecated_ruler_get_property;

widget_class->realize = gtk_deprecated_ruler_realize;

widget_class->unrealize = gtk_deprecated_ruler_unrealize;

widget_class->size_request = gtk_deprecated_ruler_size_request;

widget_class->size_allocate = gtk_deprecated_ruler_size_allocate;

widget_class->motion_notify_event = gtk_deprecated_ruler_motion_notify;

widget_class->expose_event = gtk_deprecated_ruler_expose;

klass->draw_ticks = gtk_deprecated_ruler_real_draw_ticks;

klass->draw_pos = gtk_deprecated_ruler_real_draw_pos;

g_object_class_override_property (gobject_class,

PROP_ORIENTATION,

"orientation");

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,

static_cast<GParamFlags>(GTK_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,

static_cast<GParamFlags>(GTK_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,

static_cast<GParamFlags>(GTK_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,

static_cast<GParamFlags>(GTK_PARAM_READWRITE)));

/**

g_object_class_install_property (gobject_class,

PROP_METRIC,

g_param_spec_enum ("metric",

_("Metric"),

_("The metric used for the ruler"),

GTK_TYPE_METRIC_TYPE,

GTK_PIXELS,

static_cast<GParamFlags>(GTK_PARAM_READWRITE)));

g_type_class_add_private (gobject_class, sizeof (GtkDeprecatedRulerPrivate));

}

static void

gtk_deprecated_ruler_init (GtkDeprecatedRuler *ruler)

{

GtkWidget *widget = GTK_WIDGET (ruler);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (ruler);

priv->orientation = GTK_ORIENTATION_HORIZONTAL;

widget->requisition.width = widget->style->xthickness * 2 + 1;

widget->requisition.height = widget->style->ythickness * 2 + RULER_WIDTH;

ruler->backing_store = NULL;

ruler->xsrc = 0;

ruler->ysrc = 0;

ruler->slider_size = 0;

ruler->lower = 0;

ruler->upper = 0;

ruler->position = 0;

ruler->max_size = 0;

gtk_deprecated_ruler_set_metric (ruler, GTK_PIXELS);

}

gtk_deprecated_ruler_set_range (GtkDeprecatedRuler *ruler,

gdouble lower,

gdouble upper,

gdouble position,

gdouble max_size)

{

g_return_if_fail (GTK_DEPRECATED_IS_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_is_drawable (GTK_WIDGET (ruler)))

gtk_widget_queue_draw (GTK_WIDGET (ruler));

}

gtk_deprecated_ruler_get_range (GtkDeprecatedRuler *ruler,

gdouble *lower,

gdouble *upper,

gdouble *position,

gdouble *max_size)

{

g_return_if_fail (GTK_DEPRECATED_IS_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;

}

static void

gtk_deprecated_ruler_set_property (GObject *object,

guint prop_id,

const GValue *value,

GParamSpec *pspec)

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (object);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (ruler);

switch (prop_id)

{

case PROP_ORIENTATION:

priv->orientation = static_cast<GtkOrientation>(g_value_get_enum (value));

gtk_widget_queue_resize (GTK_WIDGET (ruler));

break;

case PROP_LOWER:

gtk_deprecated_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,

ruler->position, ruler->max_size);

break;

case PROP_UPPER:

gtk_deprecated_ruler_set_range (ruler, ruler->lower, g_value_get_double (value),

ruler->position, ruler->max_size);

break;

case PROP_POSITION:

gtk_deprecated_ruler_set_range (ruler, ruler->lower, ruler->upper,

g_value_get_double (value), ruler->max_size);

break;

case PROP_MAX_SIZE:

gtk_deprecated_ruler_set_range (ruler, ruler->lower, ruler->upper,

ruler->position, g_value_get_double (value));

break;

case PROP_METRIC:

gtk_deprecated_ruler_set_metric (ruler, static_cast<GtkMetricType>(g_value_get_enum (value)));

break;

default:

G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

break;

}

}

static void

gtk_deprecated_ruler_get_property (GObject *object,

guint prop_id,

GValue *value,

GParamSpec *pspec)

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (object);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (ruler);

switch (prop_id)

{

case PROP_ORIENTATION:

g_value_set_enum (value, priv->orientation);

break;

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_METRIC:

g_value_set_enum (value, gtk_deprecated_ruler_get_metric (ruler));

break;

default:

G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

break;

}

}

gtk_deprecated_ruler_set_metric (GtkDeprecatedRuler *ruler,

GtkMetricType metric)

{

g_return_if_fail (GTK_DEPRECATED_IS_RULER (ruler));

ruler->metric = (GtkDeprecatedRulerMetric *) &ruler_metrics[metric];

if (gtk_widget_is_drawable (GTK_WIDGET (ruler)))

gtk_widget_queue_draw (GTK_WIDGET (ruler));

g_object_notify (G_OBJECT (ruler), "metric");

}

gtk_deprecated_ruler_get_metric (GtkDeprecatedRuler *ruler)

{

gint i;

g_return_val_if_fail (GTK_DEPRECATED_IS_RULER (ruler), static_cast<GtkMetricType>(0));

for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)

if (ruler->metric == &ruler_metrics[i])

return static_cast<GtkMetricType>(i);

g_assert_not_reached ();

return static_cast<GtkMetricType>(0);

}

gtk_deprecated_ruler_draw_ticks (GtkDeprecatedRuler *ruler)

{

g_return_if_fail (GTK_DEPRECATED_IS_RULER (ruler));

if (GTK_DEPRECATED_RULER_GET_CLASS (ruler)->draw_ticks)

GTK_DEPRECATED_RULER_GET_CLASS (ruler)->draw_ticks (ruler);

}

gtk_deprecated_ruler_draw_pos (GtkDeprecatedRuler *ruler)

{

g_return_if_fail (GTK_DEPRECATED_IS_RULER (ruler));

if (GTK_DEPRECATED_RULER_GET_CLASS (ruler)->draw_pos)

GTK_DEPRECATED_RULER_GET_CLASS (ruler)->draw_pos (ruler);

}

static void

gtk_deprecated_ruler_realize (GtkWidget *widget)

{

GtkDeprecatedRuler *ruler;

GdkWindowAttr attributes;

gint attributes_mask;

ruler = GTK_DEPRECATED_RULER (widget);

gtk_widget_set_realized (widget, TRUE);

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_deprecated_ruler_make_pixmap (ruler);

}

static void

gtk_deprecated_ruler_unrealize (GtkWidget *widget)

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (widget);

if (ruler->backing_store)

{

g_object_unref (ruler->backing_store);

ruler->backing_store = NULL;

}

GTK_WIDGET_CLASS (gtk_deprecated_ruler_parent_class)->unrealize (widget);

}

static void

gtk_deprecated_ruler_size_request (GtkWidget *widget,

GtkRequisition *requisition)

{

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (widget);

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

requisition->width = widget->style->xthickness * 2 + 1;

requisition->height = widget->style->ythickness * 2 + RULER_WIDTH;

}

else

{

requisition->width = widget->style->xthickness * 2 + RULER_WIDTH;

requisition->height = widget->style->ythickness * 2 + 1;

}

}

static void

gtk_deprecated_ruler_size_allocate (GtkWidget *widget,

GtkAllocation *allocation)

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (widget);

widget->allocation = *allocation;

if (gtk_widget_get_realized (widget))

{

gdk_window_move_resize (widget->window,

allocation->x, allocation->y,

allocation->width, allocation->height);

gtk_deprecated_ruler_make_pixmap (ruler);

}

}

static gboolean

gtk_deprecated_ruler_motion_notify (GtkWidget *widget,

GdkEventMotion *event)

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (widget);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (widget);

gint x;

gint y;

gdk_event_request_motions (event);

x = event->x;

y = event->y;

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width;

else

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)

gtk_deprecated_ruler_draw_pos (ruler);

return FALSE;

}

static gboolean

gtk_deprecated_ruler_expose (GtkWidget *widget,

GdkEventExpose *event)

{

if (gtk_widget_is_drawable (widget))

{

GtkDeprecatedRuler *ruler = GTK_DEPRECATED_RULER (widget);

cairo_t *cr;

gtk_deprecated_ruler_draw_ticks (ruler);

cr = gdk_cairo_create (widget->window);

gdk_cairo_set_source_pixmap (cr, ruler->backing_store, 0, 0);

gdk_cairo_rectangle (cr, &event->area);

cairo_fill (cr);

cairo_destroy (cr);

gtk_deprecated_ruler_draw_pos (ruler);

}

return FALSE;

}

static void

gtk_deprecated_ruler_make_pixmap (GtkDeprecatedRuler *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;

}

static void

gtk_deprecated_ruler_real_draw_ticks (GtkDeprecatedRuler *ruler)

{

GtkWidget *widget = GTK_WIDGET (ruler);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (ruler);

cairo_t *cr;

gint i, j;

gint width, height;

gint xthickness;

gint ythickness;

gint length, ideal_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 subd_incr;

gdouble start, end, cur;

gchar unit_str[32];

gint digit_height;

gint digit_offset;

gint text_width;

gint text_height;

gint pos;

PangoLayout *layout;

PangoRectangle logical_rect, ink_rect;

if (!gtk_widget_is_drawable (widget))

return;

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;

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

width = widget->allocation.width;

height = widget->allocation.height - ythickness * 2;

}

else

{

width = widget->allocation.height;

height = widget->allocation.width - ythickness * 2;

}

#define DETAILE(priv) (priv->orientation == GTK_ORIENTATION_HORIZONTAL ? "hruler" : "vruler");

gtk_paint_box (widget->style, ruler->backing_store,

GTK_STATE_NORMAL, GTK_SHADOW_OUT,

NULL, widget,

priv->orientation == GTK_ORIENTATION_HORIZONTAL ?

"hruler" : "vruler",

0, 0,

widget->allocation.width, widget->allocation.height);

cr = gdk_cairo_create (ruler->backing_store);

gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

cairo_rectangle (cr,

xthickness,

height + ythickness,

widget->allocation.width - 2 * xthickness,

1);

}

else

{

cairo_rectangle (cr,

height + xthickness,

ythickness,

1,

widget->allocation.height - 2 * ythickness);

}

upper = ruler->upper / ruler->metric->pixels_per_unit;

lower = ruler->lower / ruler->metric->pixels_per_unit;

if ((upper - lower) == 0)

goto out;

increment = (gdouble) width / (upper - lower);

/* determine the scale H

/* determine the scale V

scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);

g_snprintf (unit_str, sizeof (unit_str), "%d", scale);

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

text_width = strlen (unit_str) * digit_height + 1;

for (scale = 0; scale < MAXIMUM_SCALES; scale++)

if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_width)

break;

}

else

{

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 = (gdouble) ruler->metric->ruler_scale[scale] /

(gdouble) ruler->metric->subdivide[i];

if (subd_incr * fabs(increment) <= MINIMUM_INCR)

continue;

/* Calculate the length of the tickmarks. Make sure that

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);

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)

{

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);

gtk_paint_layout (widget->style,

ruler->backing_store,

gtk_widget_get_state (widget),

FALSE,

NULL,

widget,

"hruler",

pos + 2, ythickness + PANGO_PIXELS (logical_rect.y - digit_offset),

layout);

}

else

{

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);

gtk_paint_layout (widget->style,

ruler->backing_store,

gtk_widget_get_state (widget),

FALSE,

NULL,

widget,

"vruler",

xthickness + 1,

pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),

layout);

}

}

}

}

}

cairo_fill (cr);

out:

cairo_destroy (cr);

g_object_unref (layout);

}

static void

gtk_deprecated_ruler_real_draw_pos (GtkDeprecatedRuler *ruler)

{

GtkWidget *widget = GTK_WIDGET (ruler);

GtkDeprecatedRulerPrivate *priv = GTK_DEPRECATED_RULER_GET_PRIVATE (ruler);

gint x, y;

gint width, height;

gint bs_width, bs_height;

gint xthickness;

gint ythickness;

gdouble increment;

if (gtk_widget_is_drawable (widget))

{

xthickness = widget->style->xthickness;

ythickness = widget->style->ythickness;

width = widget->allocation.width;

height = widget->allocation.height;

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

height -= ythickness * 2;

bs_width = height / 2 + 2;

bs_width |= 1; /* make sure it's odd */

bs_height = bs_width / 2 + 1;

}

else

{

width -= xthickness * 2;

bs_height = width / 2 + 2;

bs_height |= 1; /* make sure it's odd */

bs_width = bs_height / 2 + 1;

}

if ((bs_width > 0) && (bs_height > 0))

{

cairo_t *cr = gdk_cairo_create (widget->window);

/* If a backing store exists, restore the ruler */

if (ruler->backing_store)

{

cairo_t *cr = gdk_cairo_create (widget->window);

gdk_cairo_set_source_pixmap (cr, ruler->backing_store, 0, 0);

cairo_rectangle (cr, ruler->xsrc, ruler->ysrc, bs_width, bs_height);

cairo_fill (cr);

cairo_destroy (cr);

}

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

increment = (gdouble) width / (ruler->upper - ruler->lower);

x = ROUND ((ruler->position - ruler->lower) * increment) + (xthickness - bs_width) / 2 - 1;

y = (height + bs_height) / 2 + ythickness;

}

else

{

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;

}

gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);

cairo_move_to (cr, x, y);

if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)

{

cairo_line_to (cr, x + bs_width / 2.0, y + bs_height);

cairo_line_to (cr, x + bs_width, y);

}

else

{

cairo_line_to (cr, x + bs_width, y + bs_height / 2.0);

cairo_line_to (cr, x, y + bs_height);

}

cairo_fill (cr);

cairo_destroy (cr);

ruler->xsrc = x;

ruler->ysrc = y;

}

}

}

#define UNUSED_PIXELS 2 // There appear to be two pixels that are not being used at each end of the ruler

static void sp_ruler_common_draw_ticks (GtkDeprecatedRuler *ruler);

static void sp_hruler_class_init (SPHRulerClass *klass);

static void sp_hruler_init (SPHRuler *hruler);

static gint sp_hruler_motion_notify (GtkWidget *widget, GdkEventMotion *event);

static GtkWidgetClass *hruler_parent_class;

sp_hruler_get_type (void)

{

static GType hruler_type = 0;

if (!hruler_type)

{

static const GTypeInfo hruler_info = {

sizeof (SPHRulerClass),

NULL, NULL,

(GClassInitFunc) sp_hruler_class_init,

NULL, NULL,

sizeof (SPHRuler),

0,

(GInstanceInitFunc) sp_hruler_init,

NULL

};

hruler_type = g_type_register_static (gtk_deprecated_ruler_get_type (), "SPHRuler", &hruler_info, (GTypeFlags)0);

}

return hruler_type;

}

static void

sp_hruler_class_init (SPHRulerClass *klass)

{

GtkWidgetClass *widget_class;

GtkDeprecatedRulerClass *ruler_class;

hruler_parent_class = (GtkWidgetClass *) g_type_class_peek_parent (klass);

widget_class = (GtkWidgetClass*) klass;

ruler_class = (GtkDeprecatedRulerClass*) klass;

widget_class->motion_notify_event = sp_hruler_motion_notify;

ruler_class->draw_ticks = sp_ruler_common_draw_ticks;

}

static void

sp_hruler_init (SPHRuler *hruler)

{

GtkWidget *widget;

GtkRequisition requisition;

GtkStyle *style;

widget = GTK_WIDGET (hruler);

gtk_widget_get_requisition (widget, &requisition);

style = gtk_widget_get_style (widget);

requisition.width = style->xthickness * 2 + 1;

requisition.height = style->ythickness * 2 + RULER_HEIGHT;

}

GtkWidget*

sp_hruler_new (void)

{

return GTK_WIDGET (g_object_new (sp_hruler_get_type (), NULL));

}

static gint

sp_hruler_motion_notify (GtkWidget *widget,

GdkEventMotion *event)

{

GtkDeprecatedRuler *ruler;

gdouble lower, upper, max_size;

GtkAllocation allocation;

g_return_val_if_fail (widget != NULL, FALSE);

g_return_val_if_fail (SP_IS_HRULER (widget), FALSE);

g_return_val_if_fail (event != NULL, FALSE);

ruler = GTK_DEPRECATED_RULER (widget);

gtk_deprecated_ruler_get_range (ruler, &lower, &upper, NULL, &max_size);

gtk_widget_get_allocation (widget, &allocation);

double x = event->x; //Although event->x is double according to the docs, it only appears to return integers

double pos = lower + (upper - lower) * (x + UNUSED_PIXELS) / (allocation.width + 2*UNUSED_PIXELS);

gtk_deprecated_ruler_set_range(ruler, lower, upper, pos, max_size);

return FALSE;

}

static void sp_vruler_class_init (SPVRulerClass *klass);

static void sp_vruler_init (SPVRuler *vruler);

static gint sp_vruler_motion_notify (GtkWidget *widget,

GdkEventMotion *event);

static void sp_vruler_size_request (GtkWidget *widget, GtkRequisition *requisition);

static GtkWidgetClass *vruler_parent_class;

sp_vruler_get_type (void)

{

static GType vruler_type = 0;

if (!vruler_type)

{

static const GTypeInfo vruler_info = {

sizeof (SPVRulerClass),

NULL, NULL,

(GClassInitFunc) sp_vruler_class_init,

NULL, NULL,

sizeof (SPVRuler),

0,

(GInstanceInitFunc) sp_vruler_init,

NULL

};

vruler_type = g_type_register_static (gtk_deprecated_ruler_get_type (), "SPVRuler", &vruler_info, (GTypeFlags)0);

}

return vruler_type;

}

static void

sp_vruler_class_init (SPVRulerClass *klass)

{

GtkWidgetClass *widget_class;

GtkDeprecatedRulerClass *ruler_class;

vruler_parent_class = (GtkWidgetClass *) g_type_class_peek_parent (klass);

widget_class = (GtkWidgetClass*) klass;

ruler_class = (GtkDeprecatedRulerClass*) klass;

widget_class->motion_notify_event = sp_vruler_motion_notify;

widget_class->size_request = sp_vruler_size_request;

ruler_class->draw_ticks = sp_ruler_common_draw_ticks;

}

static void

sp_vruler_init (SPVRuler *vruler)

{

GtkWidget *widget;

GtkRequisition requisition;

GtkStyle *style;

widget = GTK_WIDGET (vruler);

gtk_widget_get_requisition (widget, &requisition);

style = gtk_widget_get_style (widget);

requisition.width = style->xthickness * 2 + RULER_WIDTH;

requisition.height = style->ythickness * 2 + 1;

g_object_set(G_OBJECT(vruler), "orientation", GTK_ORIENTATION_VERTICAL, NULL);

}

GtkWidget*

sp_vruler_new (void)

{

return GTK_WIDGET (g_object_new (sp_vruler_get_type (), NULL));

}

static gint

sp_vruler_motion_notify (GtkWidget *widget,

GdkEventMotion *event)

{

GtkDeprecatedRuler *ruler;

gdouble lower, upper, max_size;

GtkAllocation allocation;

g_return_val_if_fail (widget != NULL, FALSE);

g_return_val_if_fail (SP_IS_VRULER (widget), FALSE);

g_return_val_if_fail (event != NULL, FALSE);

ruler = GTK_DEPRECATED_RULER (widget);

gtk_deprecated_ruler_get_range (ruler, &lower, &upper, NULL, &max_size);

gtk_widget_get_allocation (widget, &allocation);

double y = event->y; //Although event->y is double according to the docs, it only appears to return integers

double pos = lower + (upper - lower) * (y + UNUSED_PIXELS) / (allocation.height + 2*UNUSED_PIXELS);

gtk_deprecated_ruler_set_range(ruler, lower, upper, pos, max_size);

return FALSE;

}

static void

sp_vruler_size_request (GtkWidget *widget, GtkRequisition *requisition)

{

GtkStyle *style = gtk_widget_get_style (widget);

requisition->width = style->xthickness * 2 + RULER_WIDTH;

}

static void

sp_ruler_common_draw_ticks(GtkDeprecatedRuler *ruler)

{

gint width = 0;

gint height = 0;

gchar unit_str[32];

gchar digit_str[2] = { '\0', '\0' };

GtkOrientation orientation;

GtkAllocation allocation;

g_return_if_fail (ruler != NULL);

if (!gtk_widget_is_drawable (GTK_WIDGET (ruler)))

return;

g_object_get(G_OBJECT(ruler), "orientation", &orientation, NULL);

GtkWidget *widget = GTK_WIDGET (ruler);

GtkStyle *style = gtk_widget_get_style (widget);

GdkGC *gc = style->fg_gc[GTK_STATE_NORMAL];

PangoContext *pango_context = gtk_widget_get_pango_context (widget);

PangoLayout *pango_layout = pango_layout_new (pango_context);

PangoFontDescription *fs = pango_font_description_new ();

pango_font_description_set_size (fs, RULER_FONT_SIZE);

pango_layout_set_font_description (pango_layout, fs);

pango_font_description_free (fs);

gint digit_height = (int) floor (RULER_FONT_SIZE * RULER_FONT_VERTICAL_SPACING / PANGO_SCALE + 0.5);

gint xthickness = style->xthickness;

gint ythickness = style->ythickness;

gtk_widget_get_allocation (widget, &allocation);

if (orientation == GTK_ORIENTATION_HORIZONTAL) {

width = allocation.width; // in pixels; is apparently 2 pixels shorter than the canvas at each end

height = allocation.height;

} else {

width = allocation.height;

height = allocation.width;

}

gtk_paint_box (style, ruler->backing_store,

GTK_STATE_NORMAL, GTK_SHADOW_NONE, NULL, widget,

orientation == GTK_ORIENTATION_HORIZONTAL ? "hruler" : "vruler",

0, 0,

allocation.width, allocation.height);

gdouble ruler_upper = 0;

gdouble ruler_lower = 0;

gdouble max_size = 0;

gtk_deprecated_ruler_get_range(ruler, &ruler_lower, &ruler_upper, NULL, &max_size);

gdouble upper = ruler_upper / ruler->metric->pixels_per_unit; // upper and lower are expressed in ruler units

gdouble lower = ruler_lower / ruler->metric->pixels_per_unit;

/* "pixels_per_unit" should be "points_per_unit". This is the size of the unit

if ((upper - lower) == 0)

return;

double increment = (double) (width + 2*UNUSED_PIXELS) / (upper - lower); // screen pixels per ruler unit

/* determine the scale

gint scale = (int)(ceil(max_size / ruler->metric->pixels_per_unit));

sprintf (unit_str, "%d", scale);

gint text_dimension = strlen (unit_str) * digit_height + 1;

for (scale = 0; scale < MAXIMUM_SCALES; scale++)

if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_dimension)

break;

if (scale == MAXIMUM_SCALES)

scale = MAXIMUM_SCALES - 1;

/* drawing starts here */

gint length = 0;

for (gint i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--) {

double subd_incr = ruler->metric->ruler_scale[scale] /

ruler->metric->subdivide[i];

if (subd_incr * fabs(increment) <= MINIMUM_INCR)

continue;

/* Calculate the length of the tickmarks. Make sure that

gint ideal_length = height / (i + 1) - 1;

if (ideal_length > ++length)

length = ideal_length;

gdouble start = 0;

gdouble end = 0;

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;

}

gint tick_index = 0;

gdouble cur = start; // location (in ruler units) of the first invisible tick at the left side of the canvas

while (cur <= end) {

// due to the typical values for cur, lower and increment, pos will often end up to

// be e.g. 641.50000000000; rounding behaviour is not defined in such a case (see round.h)

// and jitter will be apparent (upon redrawing some of the lines on the ruler might jump a

// by a pixel, and jump back on the next redraw). This is suppressed by adding 1e-9 (that's only one nanopixel ;-))

gint pos = int(Inkscape::round((cur - lower) * increment + 1e-12)) - UNUSED_PIXELS;

if (orientation == GTK_ORIENTATION_HORIZONTAL) {

gdk_draw_line (ruler->backing_store, gc,

pos, height + ythickness,

pos, height - length + ythickness);

} else {

gdk_draw_line (ruler->backing_store, gc,

height + xthickness - length, pos,

height + xthickness, pos);

}

/* draw label */

double label_spacing_px = fabs((increment*(double)ruler->metric->ruler_scale[scale])/ruler->metric->subdivide[i]);

if (i == 0 &&

(label_spacing_px > 6*digit_height || tick_index%2 == 0 || cur == 0) &&

(label_spacing_px > 3*digit_height || tick_index%4 == 0 || cur == 0))

{

if (fabs((int)cur) >= 2000 && (((int) cur)/1000)*1000 == ((int) cur))

sprintf (unit_str, "%dk", ((int) cur)/1000);

else

sprintf (unit_str, "%d", (int) cur);

if (orientation == GTK_ORIENTATION_HORIZONTAL) {

pango_layout_set_text (pango_layout, unit_str, -1);

gdk_draw_layout (ruler->backing_store, gc,

pos + 2, 0, pango_layout);

} else {

for (gint j = 0; j < (int) strlen (unit_str); j++) {

digit_str[0] = unit_str[j];

pango_layout_set_text (pango_layout, digit_str, 1);

gdk_draw_layout (ruler->backing_store, gc,

xthickness + 1,

pos + digit_height * (j) + 1,

pango_layout);

}

}

}

/* Calculate cur from start rather than incrementing by subd_incr

++tick_index;

cur = start + tick_index * subd_incr;

}

}

}

static GtkDeprecatedRulerMetric const sp_ruler_metrics[] = {

// NOTE: the order of records in this struct must correspond to the SPMetric enum.

{const_cast<gchar*>("NONE"), const_cast<gchar*>(""), 1, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("millimeters"), const_cast<gchar*>("mm"), PX_PER_MM, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("centimeters"), const_cast<gchar*>("cm"), PX_PER_CM, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("inches"), const_cast<gchar*>("in"), PX_PER_IN, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},

{const_cast<gchar*>("feet"), const_cast<gchar*>("ft"), PX_PER_FT, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("points"), const_cast<gchar*>("pt"), PX_PER_PT, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("picas"), const_cast<gchar*>("pc"), PX_PER_PC, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("pixels"), const_cast<gchar*>("px"), PX_PER_PX, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

{const_cast<gchar*>("meters"), const_cast<gchar*>("m"), PX_PER_M, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},

};

sp_ruler_set_metric (GtkDeprecatedRuler *ruler,

SPMetric metric)

{

g_return_if_fail (ruler != NULL);

g_return_if_fail (GTK_DEPRECATED_IS_RULER (ruler));

g_return_if_fail((unsigned) metric < G_N_ELEMENTS(sp_ruler_metrics));

if (metric == 0)

return;

ruler->metric = const_cast<GtkDeprecatedRulerMetric *>(&sp_ruler_metrics[metric]);

if (gtk_widget_is_drawable (GTK_WIDGET (ruler)))

gtk_widget_queue_draw (GTK_WIDGET (ruler));

}