ruler.cpp revision 4e47dd454b9d10cbca9ad0390cfbd176858287b8
/*
* Customized ruler class for inkscape. Note that this is a fork of
* the GimpRuler widget from GIMP: libgimpwidgets/gimpruler.c.
* The GIMP code is released under the GPL 3. The GIMP code itself
* is a fork of the now-obsolete GtkRuler widget from GTK+ 2.
*
* Major differences between implementations in Inkscape and GIMP are
* as follows:
* - We use a 1,2,4,8... scale for inches and 1,2,5,10... for everything
* else. GIMP uses 1,2,5,10... for everything.
*
* - We use a default font size of PANGO_SCALE_X_SMALL for labels,
* GIMP uses PANGO_SCALE_SMALL (i.e., a bit larger than ours).
*
* - We abbreviate large numbers in tick-labels (e.g., 10000 -> 10k)
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Frank Felfe <innerspace@iname.com>
* bulia byak <buliabyak@users.sf.net>
* Diederik van Lierop <mail@diedenrezi.nl>
* Jon A. Cruz <jon@joncruz.org>
* Alex Valavanis <valavanisalex@gmail.com>
*
* Copyright (C) 1999-2011 authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <cstring>
#include <cmath>
#include <cstdio>
#include "widget-sizes.h"
#include "ruler.h"
#include "round.h"
#include <glibmm/i18n.h>
#include "util/units.h"
#define ROUND(x) ((int) ((x) + 0.5))
#define GTK_PARAM_READWRITE G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
#define DEFAULT_RULER_FONT_SCALE PANGO_SCALE_X_SMALL
#define MINIMUM_INCR 5
using Inkscape::Util::unit_table;
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;
Inkscape::Util::Unit const *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;
GList *track_widgets;
} SPRulerPrivate;
#define SP_RULER_GET_PRIVATE(ruler) \
G_TYPE_INSTANCE_GET_PRIVATE (ruler, SP_TYPE_RULER, SPRulerPrivate)
struct SPRulerMetric
{
gdouble ruler_scale[16];
gint subdivide[5];
};
// Ruler metric for general use.
static SPRulerMetric const ruler_metric_general = {
{ 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
{ 1, 5, 10, 50, 100 }
};
// Ruler metric for inch scales.
static SPRulerMetric const ruler_metric_inches = {
{ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 },
{ 1, 2, 4, 8, 16 }
};
static void sp_ruler_dispose (GObject *object);
static void sp_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void sp_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void sp_ruler_realize (GtkWidget *widget);
static void sp_ruler_unrealize (GtkWidget *widget);
static void sp_ruler_map (GtkWidget *widget);
static void sp_ruler_unmap (GtkWidget *widget);
static void sp_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
#if GTK_CHECK_VERSION(3,0,0)
static void sp_ruler_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
static void sp_ruler_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
static void sp_ruler_style_updated (GtkWidget *widget);
#else
static void sp_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void sp_ruler_style_set (GtkWidget *widget,
GtkStyle *prev_style);
#endif
static gboolean sp_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean sp_ruler_draw (GtkWidget *widget,
cairo_t *cr);
#if !GTK_CHECK_VERSION(3,0,0)
static gboolean sp_ruler_expose (GtkWidget *widget,
GdkEventExpose *event);
#endif
static void sp_ruler_draw_ticks (SPRuler *ruler);
static void sp_ruler_draw_pos (SPRuler *ruler);
static void sp_ruler_make_pixmap (SPRuler *ruler);
static PangoLayout * sp_ruler_get_layout (GtkWidget *widget,
const gchar *text);
G_DEFINE_TYPE (SPRuler, sp_ruler, GTK_TYPE_WIDGET)
#define parent_class sp_ruler_parent_class
static void
sp_ruler_class_init (SPRulerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = sp_ruler_dispose;
object_class->set_property = sp_ruler_set_property;
object_class->get_property = sp_ruler_get_property;
widget_class->realize = sp_ruler_realize;
widget_class->unrealize = sp_ruler_unrealize;
widget_class->map = sp_ruler_map;
widget_class->unmap = sp_ruler_unmap;
widget_class->size_allocate = sp_ruler_size_allocate;
#if GTK_CHECK_VERSION(3,0,0)
widget_class->get_preferred_width = sp_ruler_get_preferred_width;
widget_class->get_preferred_height = sp_ruler_get_preferred_height;
widget_class->style_updated = sp_ruler_style_updated;
widget_class->draw = sp_ruler_draw;
#else
widget_class->size_request = sp_ruler_size_request;
widget_class->style_set = sp_ruler_style_set;
widget_class->expose_event = sp_ruler_expose;
#endif
widget_class->motion_notify_event = sp_ruler_motion_notify;
g_type_class_add_private (object_class, sizeof (SPRulerPrivate));
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,
static_cast<GParamFlags>(GTK_PARAM_READWRITE)));
/* FIXME: Should probably use g_param_spec_enum */
g_object_class_install_property (object_class,
PROP_UNIT,
g_param_spec_string ("unit",
_("Unit"),
_("Unit of the ruler"),
"px",
static_cast<GParamFlags>(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,
static_cast<GParamFlags>(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,
static_cast<GParamFlags>(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,
static_cast<GParamFlags>(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,
static_cast<GParamFlags>(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,
G_PARAM_READABLE));
}
static void
sp_ruler_init (SPRuler *ruler)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
gtk_widget_set_has_window (GTK_WIDGET (ruler), FALSE);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->unit = unit_table.getUnit("px");
priv->lower = 0;
priv->upper = 0;
priv->position = 0;
priv->max_size = 0;
priv->backing_store = NULL;
priv->font_scale = DEFAULT_RULER_FONT_SCALE;
#if GTK_CHECK_VERSION(3,0,0)
#if GTK_CHECK_VERSION(3,8,0)
const gchar *str =
"SPRuler {\n"
" background-color: @theme_bg_color;\n"
"}\n";
#else
const gchar *str =
"SPRuler {\n"
" background-color: @bg_color;\n"
"}\n";
#endif
GtkCssProvider *css = gtk_css_provider_new ();
gtk_css_provider_load_from_data (css, str, -1, NULL);
gtk_style_context_add_provider (gtk_widget_get_style_context (GTK_WIDGET (ruler)),
GTK_STYLE_PROVIDER (css),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
g_object_unref (css);
#endif
}
static void
sp_ruler_dispose (GObject *object)
{
SPRuler *ruler = SP_RULER (object);
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
while (priv->track_widgets)
sp_ruler_remove_track_widget (ruler, GTK_WIDGET(priv->track_widgets->data));
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/**
* sp_ruler_set_range:
* @ruler: the SPRuler
* @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.
*/
void
sp_ruler_set_range (SPRuler *ruler,
gdouble lower,
gdouble upper,
gdouble max_size)
{
SPRulerPrivate *priv;
g_return_if_fail (SP_IS_RULER (ruler));
priv = SP_RULER_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));
}
/**
* sp_ruler_get_range:
* @ruler: a #SPRuler
* @lower: (allow-none): location to store lower limit of the ruler, or %NULL
* @upper: (allow-none): 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 #SPRuler.
* See sp_ruler_set_range().
**/
void
sp_ruler_get_range (SPRuler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *max_size)
{
SPRulerPrivate *priv;
g_return_if_fail (SP_IS_RULER (ruler));
priv = SP_RULER_GET_PRIVATE (ruler);
if (lower)
*lower = priv->lower;
if (upper)
*upper = priv->upper;
if (max_size)
*max_size = priv->max_size;
}
static void
sp_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
SPRuler *ruler = SP_RULER (object);
SPRulerPrivate *priv = SP_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_UNIT:
sp_ruler_set_unit (ruler, unit_table.getUnit(g_value_get_string (value)));
break;
case PROP_LOWER:
sp_ruler_set_range (ruler,
g_value_get_double (value),
priv->upper,
priv->max_size);
break;
case PROP_UPPER:
sp_ruler_set_range (ruler,
priv->lower,
g_value_get_double (value),
priv->max_size);
break;
case PROP_POSITION:
sp_ruler_set_position (ruler, g_value_get_double (value));
break;
case PROP_MAX_SIZE:
sp_ruler_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
sp_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
SPRuler *ruler = SP_RULER (object);
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_UNIT:
g_value_set_string (value, priv->unit->abbr.c_str());
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;
}
}
static void
sp_ruler_realize (GtkWidget *widget)
{
SPRuler *ruler = SP_RULER (widget);
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
GdkWindowAttr attributes;
gint attributes_mask;
GTK_WIDGET_CLASS (sp_ruler_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;
#if GTK_CHECK_VERSION(3,0,0)
attributes.event_mask = (gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
#else
attributes.event_mask = (gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK);
#endif
attributes_mask = GDK_WA_X | GDK_WA_Y;
priv->input_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (priv->input_window, ruler);
sp_ruler_make_pixmap (ruler);
}
static void
sp_ruler_unrealize(GtkWidget *widget)
{
SPRuler *ruler = SP_RULER (widget);
SPRulerPrivate *priv = SP_RULER_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)
{
gdk_window_destroy (priv->input_window);
priv->input_window = NULL;
}
GTK_WIDGET_CLASS (sp_ruler_parent_class)->unrealize (widget);
}
static void
sp_ruler_map (GtkWidget *widget)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (widget);
GTK_WIDGET_CLASS (sp_ruler_parent_class)->map (widget);
if (priv->input_window)
gdk_window_show (priv->input_window);
}
static void
sp_ruler_unmap (GtkWidget *widget)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (widget);
if (priv->input_window)
gdk_window_hide (priv->input_window);
GTK_WIDGET_CLASS (sp_ruler_parent_class)->unmap (widget);
}
static void
sp_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
SPRuler *ruler = SP_RULER(widget);
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
GtkAllocation widget_allocation;
gboolean resized;
gtk_widget_get_allocation (widget, &widget_allocation);
resized = (widget_allocation.width != allocation->width ||
widget_allocation.height != allocation->height);
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);
if (resized)
sp_ruler_make_pixmap (ruler);
}
}
static void
sp_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (widget);
PangoLayout *layout;
PangoRectangle ink_rect;
gint size;
layout = sp_ruler_get_layout (widget, "0123456789");
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
size = 2 + ink_rect.height * 1.7;
#if GTK_CHECK_VERSION(3,0,0)
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
gtk_style_context_get_border (context, static_cast<GtkStateFlags>(0), &border);
requisition->width = border.left + border.right;
requisition->height = border.top + border.bottom;
#else
GtkStyle *style = gtk_widget_get_style(widget);
#endif
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
#if GTK_CHECK_VERSION(3,0,0)
requisition->width += 1;
requisition->height += size;
#else
requisition->width = style->xthickness * 2 + 1;
requisition->height = style->ythickness * 2 + size;
#endif
}
else
{
#if GTK_CHECK_VERSION(3,0,0)
requisition->width += size;
requisition->height += 1;
#else
requisition->width = style->xthickness * 2 + size;
requisition->height = style->ythickness * 2 + 1;
#endif
}
}
static void
#if GTK_CHECK_VERSION(3,0,0)
sp_ruler_style_updated (GtkWidget *widget)
#else
sp_ruler_style_set (GtkWidget *widget,
GtkStyle *prev_style)
#endif
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (widget);
#if GTK_CHECK_VERSION(3,0,0)
GTK_WIDGET_CLASS (sp_ruler_parent_class)->style_updated (widget);
#else
GTK_WIDGET_CLASS (sp_ruler_parent_class)->style_set (widget, prev_style);
#endif
gtk_widget_style_get (widget,
"font-scale", &priv->font_scale,
NULL);
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
}
#if GTK_CHECK_VERSION(3,0,0)
static void
sp_ruler_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
GtkRequisition requisition;
sp_ruler_size_request (widget, &requisition);
*minimum_width = *natural_width = requisition.width;
}
static void
sp_ruler_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
GtkRequisition requisition;
sp_ruler_size_request(widget, &requisition);
*minimum_height = *natural_height = requisition.height;
}
#else
static gboolean
sp_ruler_expose (GtkWidget *widget,
GdkEventExpose *event)
{
cairo_t *cr = gdk_cairo_create(gtk_widget_get_window(widget));
GtkAllocation allocation;
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
gtk_widget_get_allocation (widget, &allocation);
cairo_translate (cr, allocation.x, allocation.y);
gboolean result = sp_ruler_draw (widget, cr);
cairo_destroy (cr);
return result;
}
#endif
static gboolean
sp_ruler_draw (GtkWidget *widget,
cairo_t *cr)
{
SPRuler *ruler = SP_RULER (widget);
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
sp_ruler_draw_ticks (ruler);
cairo_set_source_surface(cr, priv->backing_store, 0, 0);
cairo_paint(cr);
sp_ruler_draw_pos (ruler);
return FALSE;
}
static void
sp_ruler_make_pixmap (SPRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
SPRulerPrivate *priv = SP_RULER_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 void
sp_ruler_draw_pos (SPRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
#if GTK_CHECK_VERSION(3,0,0)
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
GdkRGBA color;
#else
GtkStyle *style = gtk_widget_get_style (widget);
GtkStateType state = gtk_widget_get_state (widget);
gint xthickness;
gint ythickness;
#endif
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gint x, y;
gint width, height;
gint bs_width, bs_height;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation(widget, &allocation);
#if GTK_CHECK_VERSION(3,0,0)
gtk_style_context_get_border (context, static_cast<GtkStateFlags>(0), &border);
#else
xthickness = style->xthickness;
ythickness = style->ythickness;
#endif
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
#if GTK_CHECK_VERSION(3,0,0)
height = allocation.height - (border.top + border.bottom);
#else
height = allocation.height - ythickness * 2;
#endif
bs_width = height / 2 + 2;
bs_width |= 1; /* make sure it's odd */
bs_height = bs_width / 2 + 1;
}
else
{
#if GTK_CHECK_VERSION(3,0,0)
width = allocation.width - (border.left + border.right);
#else
width = allocation.width - xthickness * 2;
#endif
height = allocation.height;
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 (gtk_widget_get_window (widget));
gdouble lower;
gdouble upper;
gdouble position;
gdouble increment;
cairo_rectangle (cr,
allocation.x, allocation.y,
allocation.width, allocation.height);
cairo_clip (cr);
cairo_translate (cr, allocation.x, allocation.y);
/* If a backing store exists, restore the ruler */
if (priv->backing_store)
{
cairo_set_source_surface (cr, priv->backing_store, 0, 0);
cairo_rectangle (cr, priv->xsrc, priv->ysrc, bs_width, bs_height);
cairo_fill (cr);
}
position = sp_ruler_get_position (ruler);
sp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
increment = (gdouble) width / (upper - lower);
#if GTK_CHECK_VERSION(3,0,0)
x = ROUND ((position - lower) * increment) + (border.left - bs_width) / 2 - 1;
y = (height + bs_height) / 2 + border.top;
#else
x = ROUND ((position - lower) * increment) + (xthickness - bs_width) / 2 - 1;
y = (height + bs_height) / 2 + ythickness;
#endif
}
else
{
increment = (gdouble) height / (upper - lower);
#if GTK_CHECK_VERSION(3,0,0)
x = (width + bs_width) / 2 + border.left;
y = ROUND ((position - lower) * increment) + (border.top - bs_height) / 2 - 1;
#else
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((position - lower) * increment) + (ythickness - bs_height) / 2 - 1;
#endif
}
#if GTK_CHECK_VERSION(3,0,0)
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
#else
gdk_cairo_set_source_color (cr, &style->fg[state]);
#endif
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);
priv->xsrc = x;
priv->ysrc = y;
}
}
/**
* sp_ruler_new:
* @orientation: the ruler's orientation
*
* Creates a new ruler.
*
* Return value: a new #SPRuler widget.
*/
GtkWidget *
sp_ruler_new (GtkOrientation orientation)
{
return GTK_WIDGET (g_object_new (SP_TYPE_RULER,
"orientation", orientation,
NULL));
}
static void
sp_ruler_update_position (SPRuler *ruler,
gdouble x,
gdouble y)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gdouble lower;
gdouble upper;
gtk_widget_get_allocation (GTK_WIDGET (ruler), &allocation);
sp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
sp_ruler_set_position (ruler,
lower +
(upper - lower) * x / allocation.width);
}
else
{
sp_ruler_set_position (ruler,
lower +
(upper - lower) * y / allocation.height);
}
}
/* Returns TRUE if a translation should be done */
static gboolean
gtk_widget_get_translation_to_window (GtkWidget *widget,
GdkWindow *window,
int *x,
int *y)
{
GdkWindow *w, *widget_window;
if (! gtk_widget_get_has_window (widget))
{
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
*x = -allocation.x;
*y = -allocation.y;
}
else
{
*x = 0;
*y = 0;
}
widget_window = gtk_widget_get_window (widget);
for (w = window;
w && w != widget_window;
w = gdk_window_get_effective_parent (w))
{
gdouble px, py;
gdk_window_coords_to_parent (w, *x, *y, &px, &py);
*x += px;
*y += px;
}
if (w == NULL)
{
*x = 0;
*y = 0;
return FALSE;
}
return TRUE;
}
static void
sp_ruler_event_to_widget_coords (GtkWidget *widget,
GdkWindow *window,
gdouble event_x,
gdouble event_y,
gint *widget_x,
gint *widget_y)
{
gint tx, ty;
if (gtk_widget_get_translation_to_window (widget, window, &tx, &ty))
{
event_x += tx;
event_y += ty;
}
*widget_x = event_x;
*widget_y = event_y;
}
static gboolean
sp_ruler_track_widget_motion_notify (GtkWidget *widget,
GdkEventMotion *mevent,
SPRuler *ruler)
{
gint widget_x;
gint widget_y;
gint ruler_x;
gint ruler_y;
widget = gtk_get_event_widget (reinterpret_cast<GdkEvent *>(mevent));
sp_ruler_event_to_widget_coords (widget, mevent->window,
mevent->x, mevent->y,
&widget_x, &widget_y);
if (gtk_widget_translate_coordinates (widget, GTK_WIDGET (ruler),
widget_x, widget_y,
&ruler_x, &ruler_y))
{
sp_ruler_update_position (ruler, ruler_x, ruler_y);
}
return FALSE;
}
void
sp_ruler_add_track_widget (SPRuler *ruler,
GtkWidget *widget)
{
SPRulerPrivate *priv;
g_return_if_fail (SP_IS_RULER (ruler));
g_return_if_fail (GTK_IS_WIDGET (ruler));
priv = SP_RULER_GET_PRIVATE (ruler);
g_return_if_fail (g_list_find (priv->track_widgets, widget) == NULL);
priv->track_widgets = g_list_prepend (priv->track_widgets, widget);
g_signal_connect (widget, "motion-notify-event",
G_CALLBACK (sp_ruler_track_widget_motion_notify),
ruler);
g_signal_connect (widget, "destroy",
G_CALLBACK (sp_ruler_remove_track_widget),
ruler);
}
/**
* sp_ruler_remove_track_widget:
* @ruler: an #SPRuler
* @widget: the track widget to remove
*
* Removes a previously added track widget from the ruler. See
* sp_ruler_add_track_widget().
*/
void
sp_ruler_remove_track_widget (SPRuler *ruler,
GtkWidget *widget)
{
SPRulerPrivate *priv;
g_return_if_fail (SP_IS_RULER (ruler));
g_return_if_fail (GTK_IS_WIDGET (ruler));
priv = SP_RULER_GET_PRIVATE (ruler);
g_return_if_fail (g_list_find (priv->track_widgets, widget) != NULL);
priv->track_widgets = g_list_remove (priv->track_widgets, widget);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) G_CALLBACK (sp_ruler_track_widget_motion_notify),
ruler);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) G_CALLBACK (sp_ruler_remove_track_widget),
ruler);
}
/**
* sp_ruler_set_unit:
* @ruler: a #SPRuler
* @unit: the #SPMetric to set the ruler to
*
* This sets the unit of the ruler.
*/
void
sp_ruler_set_unit (SPRuler *ruler,
Inkscape::Util::Unit const *unit)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
g_return_if_fail (SP_IS_RULER (ruler));
if (*priv->unit != *unit)
{
priv->unit = unit;
g_object_notify(G_OBJECT(ruler), "unit");
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
}
/**
* sp_ruler_get_unit:
* @ruler: a #SPRuler
*
* Return value: the unit currently used in the @ruler widget.
**/
Inkscape::Util::Unit const*
sp_ruler_get_unit (SPRuler *ruler)
{
return SP_RULER_GET_PRIVATE (ruler)->unit;
}
/**
* sp_ruler_set_position:
* @ruler: a #SPRuler
* @position: the position to set the ruler to
*
* This sets the position of the ruler.
*/
void
sp_ruler_set_position (SPRuler *ruler,
gdouble position)
{
SPRulerPrivate *priv;
g_return_if_fail (SP_IS_RULER (ruler));
priv = SP_RULER_GET_PRIVATE (ruler);
if (priv->position != position)
{
priv->position = position;
g_object_notify (G_OBJECT (ruler), "position");
sp_ruler_draw_pos (ruler);
}
}
/**
* sp_ruler_get_position:
* @ruler: a #SPRuler
*
* Return value: the current position of the @ruler widget.
*/
gdouble
sp_ruler_get_position (SPRuler *ruler)
{
g_return_val_if_fail (SP_IS_RULER (ruler), 0.0);
return SP_RULER_GET_PRIVATE (ruler)->position;
}
static gboolean
sp_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
SPRuler *ruler = SP_RULER(widget);
sp_ruler_update_position (ruler, event->x, event->y);
return FALSE;
}
static void
sp_ruler_draw_ticks (SPRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
#if GTK_CHECK_VERSION(3,0,0)
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
GdkRGBA color;
#else
GtkStyle *style = gtk_widget_get_style (widget);
GtkStateType state = gtk_widget_get_state (widget);
gint xthickness;
gint ythickness;
#endif
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
cairo_t *cr;
gint i;
gint width, height;
gint length, ideal_length;
gdouble lower, upper; /* Upper and lower limits, in ruler units */
gdouble increment; /* Number of pixels per unit */
guint scale; /* Number of units per major unit */
gdouble start, end, cur;
gchar unit_str[32];
gint digit_height;
gint digit_offset;
gchar digit_str[2] = { '\0', '\0' };
gint text_size;
gint pos;
gdouble max_size;
Inkscape::Util::Unit const *unit = NULL;
SPRulerMetric ruler_metric = ruler_metric_general; /* The metric to use for this unit system */
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
#if GTK_CHECK_VERSION(3,0,0)
gtk_style_context_get_border (context, static_cast<GtkStateFlags>(0), &border);
#else
xthickness = style->xthickness;
ythickness = style->ythickness;
#endif
layout = sp_ruler_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;
#if GTK_CHECK_VERSION(3,0,0)
height = allocation.height - (border.top + border.bottom);
#else
height = allocation.height - ythickness * 2;
#endif
}
else
{
width = allocation.height;
#if GTK_CHECK_VERSION(3,0,0)
height = allocation.width - (border.top + border.bottom);
#else
height = allocation.width - ythickness * 2;
#endif
}
cr = cairo_create (priv->backing_store);
#if GTK_CHECK_VERSION(3,0,0)
gtk_render_background (context, cr, 0, 0, allocation.width, allocation.height);
gtk_render_frame (context, cr, 0, 0, allocation.width, allocation.height);
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
border.left,
height + border.top,
allocation.width - (border.left + border.right),
1);
}
else
{
cairo_rectangle (cr,
height + border.left,
border.top,
1,
allocation.height - (border.top + border.bottom));
}
#else
gdk_cairo_set_source_color (cr, &style->bg[state]);
cairo_paint (cr);
gdk_cairo_set_source_color(cr, &style->fg[state]);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
xthickness,
height + ythickness,
allocation.width - 2 * xthickness,
1);
}
else
{
cairo_rectangle (cr,
height + xthickness,
ythickness,
1,
allocation.height - 2 * ythickness);
}
#endif
sp_ruler_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 (priv->max_size);
sprintf (unit_str, "%d", scale);
text_size = strlen (unit_str) * digit_height + 1;
/* Inkscape change to ruler: Use a 1,2,4,8... scale for inches
* or a 1,2,5,10... scale for everything else */
if (*sp_ruler_get_unit (ruler) == *unit_table.getUnit("in"))
ruler_metric = ruler_metric_inches;
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 = sp_ruler_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 == *unit_table.getUnit("px") && 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;
/* 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;
}
gint tick_index = 0;
for (cur = start; cur <= end; cur += subd_incr)
{
// 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 ;-))
pos = gint(Inkscape::round((cur - lower) * increment + 1e-12));
#if GTK_CHECK_VERSION(3,0,0)
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
pos, height + border.top - length,
1, length);
}
else
{
cairo_rectangle (cr,
height + border.left - length, pos,
length, 1);
}
#else
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);
}
#endif
/* 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 (std::abs((int)cur) >= 2000 && (((int) cur)/1000)*1000 == ((int) cur))
sprintf (unit_str, "%dk", ((int) cur)/1000);
else
sprintf (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);
#if GTK_CHECK_VERSION(3,0,0)
cairo_move_to (cr,
pos + 2,
border.top + PANGO_PIXELS (logical_rect.y - digit_offset));
#else
cairo_move_to (cr,
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset));
#endif
pango_cairo_show_layout(cr, layout);
}
else
{
gint j;
for (j = 0; j < (int) strlen (unit_str); j++)
{
digit_str[0] = unit_str[j];
pango_layout_set_text (layout, digit_str, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
#if GTK_CHECK_VERSION(3,0,0)
cairo_move_to (cr,
border.left + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
#else
cairo_move_to (cr,
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
#endif
pango_cairo_show_layout (cr, layout);
}
}
}
++tick_index;
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
}
static PangoLayout*
sp_ruler_create_layout (GtkWidget *widget,
const gchar *text)
{
SPRulerPrivate *priv = SP_RULER_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 *
sp_ruler_get_layout (GtkWidget *widget,
const gchar *text)
{
SPRulerPrivate *priv = SP_RULER_GET_PRIVATE (widget);
if (priv->layout)
{
pango_layout_set_text (priv->layout, text, -1);
return priv->layout;
}
priv->layout = sp_ruler_create_layout (widget, text);
return priv->layout;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :