930 lines
26 KiB
C
930 lines
26 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <string.h>
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#include "gtkorientable.h"
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#include "gtkruler.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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#define RULER_WIDTH 14
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#define MINIMUM_INCR 5
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#define MAXIMUM_SUBDIVIDE 5
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#define MAXIMUM_SCALES 10
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#define ROUND(x) ((int) ((x) + 0.5))
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struct _GtkRulerPriv
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{
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GtkOrientation orientation;
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GtkRulerMetric *metric;
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GdkPixmap *backing_store;
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gint slider_size;
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gint xsrc;
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gint ysrc;
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gdouble lower; /* The upper limit of the ruler (in points) */
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gdouble max_size; /* The maximum size of the ruler */
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gdouble position; /* The position of the mark on the ruler */
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gdouble upper; /* The lower limit of the ruler */
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};
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enum {
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PROP_0,
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PROP_ORIENTATION,
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PROP_LOWER,
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PROP_UPPER,
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PROP_POSITION,
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PROP_MAX_SIZE,
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PROP_METRIC
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};
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static void gtk_ruler_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_ruler_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_ruler_realize (GtkWidget *widget);
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static void gtk_ruler_unrealize (GtkWidget *widget);
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static void gtk_ruler_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_ruler_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean gtk_ruler_motion_notify (GtkWidget *widget,
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GdkEventMotion *event);
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static gboolean gtk_ruler_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_ruler_make_pixmap (GtkRuler *ruler);
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static void gtk_ruler_real_draw_ticks (GtkRuler *ruler);
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static void gtk_ruler_real_draw_pos (GtkRuler *ruler);
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static const GtkRulerMetric ruler_metrics[] =
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{
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{ "Pixel", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
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{ "Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
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{ "Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
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};
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G_DEFINE_TYPE_WITH_CODE (GtkRuler, gtk_ruler, GTK_TYPE_WIDGET,
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G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
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NULL))
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static void
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gtk_ruler_class_init (GtkRulerClass *class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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gobject_class->set_property = gtk_ruler_set_property;
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gobject_class->get_property = gtk_ruler_get_property;
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widget_class->realize = gtk_ruler_realize;
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widget_class->unrealize = gtk_ruler_unrealize;
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widget_class->size_request = gtk_ruler_size_request;
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widget_class->size_allocate = gtk_ruler_size_allocate;
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widget_class->motion_notify_event = gtk_ruler_motion_notify;
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widget_class->expose_event = gtk_ruler_expose;
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class->draw_ticks = gtk_ruler_real_draw_ticks;
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class->draw_pos = gtk_ruler_real_draw_pos;
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g_object_class_override_property (gobject_class,
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PROP_ORIENTATION,
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"orientation");
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g_object_class_install_property (gobject_class,
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PROP_LOWER,
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g_param_spec_double ("lower",
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P_("Lower"),
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P_("Lower limit of ruler"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_UPPER,
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g_param_spec_double ("upper",
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P_("Upper"),
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P_("Upper limit of ruler"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_POSITION,
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g_param_spec_double ("position",
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P_("Position"),
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P_("Position of mark on the ruler"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_MAX_SIZE,
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g_param_spec_double ("max-size",
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P_("Max Size"),
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P_("Maximum size of the ruler"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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GTK_PARAM_READWRITE));
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/**
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* GtkRuler:metric:
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*
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* The metric used for the ruler.
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*
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* Since: 2.8
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*/
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g_object_class_install_property (gobject_class,
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PROP_METRIC,
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g_param_spec_enum ("metric",
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P_("Metric"),
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P_("The metric used for the ruler"),
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GTK_TYPE_METRIC_TYPE,
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GTK_PIXELS,
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GTK_PARAM_READWRITE));
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g_type_class_add_private (gobject_class, sizeof (GtkRulerPriv));
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}
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static void
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gtk_ruler_init (GtkRuler *ruler)
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{
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GtkWidget *widget = GTK_WIDGET (ruler);
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GtkRulerPriv *priv;
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ruler->priv = G_TYPE_INSTANCE_GET_PRIVATE (ruler,
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GTK_TYPE_RULER,
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GtkRulerPriv);
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priv = ruler->priv;
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priv->orientation = GTK_ORIENTATION_HORIZONTAL;
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widget->requisition.width = widget->style->xthickness * 2 + 1;
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widget->requisition.height = widget->style->ythickness * 2 + RULER_WIDTH;
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priv->backing_store = NULL;
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priv->xsrc = 0;
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priv->ysrc = 0;
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priv->slider_size = 0;
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priv->lower = 0;
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priv->upper = 0;
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priv->position = 0;
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priv->max_size = 0;
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gtk_ruler_set_metric (ruler, GTK_PIXELS);
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}
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static void
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gtk_ruler_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkRuler *ruler = GTK_RULER (object);
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GtkRulerPriv *priv = ruler->priv;
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switch (prop_id)
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{
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case PROP_ORIENTATION:
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priv->orientation = g_value_get_enum (value);
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gtk_widget_queue_resize (GTK_WIDGET (ruler));
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break;
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case PROP_LOWER:
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gtk_ruler_set_range (ruler, g_value_get_double (value), priv->upper,
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priv->position, priv->max_size);
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break;
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case PROP_UPPER:
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gtk_ruler_set_range (ruler, priv->lower, g_value_get_double (value),
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priv->position, priv->max_size);
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break;
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case PROP_POSITION:
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gtk_ruler_set_range (ruler, priv->lower, priv->upper,
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g_value_get_double (value), priv->max_size);
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break;
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case PROP_MAX_SIZE:
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gtk_ruler_set_range (ruler, priv->lower, priv->upper,
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priv->position, g_value_get_double (value));
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break;
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case PROP_METRIC:
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gtk_ruler_set_metric (ruler, g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_ruler_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkRuler *ruler = GTK_RULER (object);
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GtkRulerPriv *priv = ruler->priv;
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switch (prop_id)
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{
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case PROP_ORIENTATION:
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g_value_set_enum (value, priv->orientation);
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break;
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case PROP_LOWER:
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g_value_set_double (value, priv->lower);
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break;
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case PROP_UPPER:
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g_value_set_double (value, priv->upper);
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break;
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case PROP_POSITION:
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g_value_set_double (value, priv->position);
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break;
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case PROP_MAX_SIZE:
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g_value_set_double (value, priv->max_size);
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break;
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case PROP_METRIC:
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g_value_set_enum (value, gtk_ruler_get_metric (ruler));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/**
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* gtk_ruler_new:
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* @orientation: the ruler's orientation.
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*
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* Creates a new #GtkRuler with the given orientation.
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*
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* Return value: a new #GtkRuler.
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*
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* Since: 3.0
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**/
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GtkWidget *
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gtk_ruler_new (GtkOrientation orientation)
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{
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return g_object_new (GTK_TYPE_RULER,
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"orientation", orientation,
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NULL);
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}
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void
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gtk_ruler_set_metric (GtkRuler *ruler,
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GtkMetricType metric)
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{
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GtkRulerPriv *priv;
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g_return_if_fail (GTK_IS_RULER (ruler));
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priv = ruler->priv;
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priv->metric = (GtkRulerMetric *) &ruler_metrics[metric];
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if (gtk_widget_is_drawable (GTK_WIDGET (ruler)))
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gtk_widget_queue_draw (GTK_WIDGET (ruler));
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g_object_notify (G_OBJECT (ruler), "metric");
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}
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/**
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* gtk_ruler_get_metric:
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* @ruler: a #GtkRuler
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*
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* Gets the units used for a #GtkRuler. See gtk_ruler_set_metric().
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*
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* Return value: the units currently used for @ruler
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**/
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GtkMetricType
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gtk_ruler_get_metric (GtkRuler *ruler)
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{
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GtkRulerPriv *priv;
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gint i;
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g_return_val_if_fail (GTK_IS_RULER (ruler), 0);
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priv = ruler->priv;
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for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)
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if (priv->metric == &ruler_metrics[i])
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return i;
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g_assert_not_reached ();
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return 0;
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}
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/**
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* gtk_ruler_set_range:
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* @ruler: the gtkruler
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* @lower: the lower limit of the ruler
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* @upper: the upper limit of the ruler
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* @position: the mark on the ruler
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* @max_size: the maximum size of the ruler used when calculating the space to
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* leave for the text
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*
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* This sets the range of the ruler.
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*/
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void
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gtk_ruler_set_range (GtkRuler *ruler,
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gdouble lower,
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gdouble upper,
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gdouble position,
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gdouble max_size)
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{
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GtkRulerPriv *priv;
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g_return_if_fail (GTK_IS_RULER (ruler));
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priv = ruler->priv;
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g_object_freeze_notify (G_OBJECT (ruler));
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if (priv->lower != lower)
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{
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priv->lower = lower;
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g_object_notify (G_OBJECT (ruler), "lower");
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}
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if (priv->upper != upper)
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{
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priv->upper = upper;
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g_object_notify (G_OBJECT (ruler), "upper");
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}
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if (priv->position != position)
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{
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priv->position = position;
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g_object_notify (G_OBJECT (ruler), "position");
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}
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if (priv->max_size != max_size)
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{
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priv->max_size = max_size;
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g_object_notify (G_OBJECT (ruler), "max-size");
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}
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g_object_thaw_notify (G_OBJECT (ruler));
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if (gtk_widget_is_drawable (GTK_WIDGET (ruler)))
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gtk_widget_queue_draw (GTK_WIDGET (ruler));
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}
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/**
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* gtk_ruler_get_range:
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* @ruler: a #GtkRuler
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* @lower: (allow-none): location to store lower limit of the ruler, or %NULL
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* @upper: (allow-none): location to store upper limit of the ruler, or %NULL
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* @position: (allow-none): location to store the current position of the mark on the ruler, or %NULL
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* @max_size: location to store the maximum size of the ruler used when calculating
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* the space to leave for the text, or %NULL.
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*
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* Retrieves values indicating the range and current position of a #GtkRuler.
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* See gtk_ruler_set_range().
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**/
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void
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gtk_ruler_get_range (GtkRuler *ruler,
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gdouble *lower,
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gdouble *upper,
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gdouble *position,
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gdouble *max_size)
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{
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GtkRulerPriv *priv;
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g_return_if_fail (GTK_IS_RULER (ruler));
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priv = ruler->priv;
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if (lower)
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*lower = priv->lower;
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if (upper)
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*upper = priv->upper;
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if (position)
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*position = priv->position;
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if (max_size)
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*max_size = priv->max_size;
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}
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void
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gtk_ruler_draw_ticks (GtkRuler *ruler)
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{
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g_return_if_fail (GTK_IS_RULER (ruler));
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if (GTK_RULER_GET_CLASS (ruler)->draw_ticks)
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GTK_RULER_GET_CLASS (ruler)->draw_ticks (ruler);
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}
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void
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gtk_ruler_draw_pos (GtkRuler *ruler)
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{
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g_return_if_fail (GTK_IS_RULER (ruler));
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if (GTK_RULER_GET_CLASS (ruler)->draw_pos)
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GTK_RULER_GET_CLASS (ruler)->draw_pos (ruler);
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}
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static void
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gtk_ruler_realize (GtkWidget *widget)
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{
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GtkRuler *ruler;
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GdkWindowAttr attributes;
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gint attributes_mask;
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ruler = GTK_RULER (widget);
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gtk_widget_set_realized (widget, TRUE);
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.x = widget->allocation.x;
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attributes.y = widget->allocation.y;
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attributes.width = widget->allocation.width;
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attributes.height = widget->allocation.height;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.colormap = gtk_widget_get_colormap (widget);
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attributes.event_mask = gtk_widget_get_events (widget);
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attributes.event_mask |= (GDK_EXPOSURE_MASK |
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GDK_POINTER_MOTION_MASK |
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GDK_POINTER_MOTION_HINT_MASK);
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
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widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
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gdk_window_set_user_data (widget->window, ruler);
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widget->style = gtk_style_attach (widget->style, widget->window);
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gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
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gtk_ruler_make_pixmap (ruler);
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}
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static void
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gtk_ruler_unrealize (GtkWidget *widget)
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{
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GtkRuler *ruler = GTK_RULER (widget);
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GtkRulerPriv *priv = ruler->priv;
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if (priv->backing_store)
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{
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g_object_unref (priv->backing_store);
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priv->backing_store = NULL;
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}
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GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize (widget);
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}
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static void
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gtk_ruler_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkRuler *ruler = GTK_RULER (widget);
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
|
|
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_ruler_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
GtkRuler *ruler = GTK_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_ruler_make_pixmap (ruler);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gtk_ruler_motion_notify (GtkWidget *widget,
|
|
GdkEventMotion *event)
|
|
{
|
|
GtkRuler *ruler = GTK_RULER (widget);
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
gint x;
|
|
gint y;
|
|
|
|
gdk_event_request_motions (event);
|
|
x = event->x;
|
|
y = event->y;
|
|
|
|
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
|
|
priv->position = priv->lower + ((priv->upper - priv->lower) * x) / widget->allocation.width;
|
|
else
|
|
priv->position = priv->lower + ((priv->upper - priv->lower) * y) / widget->allocation.height;
|
|
|
|
g_object_notify (G_OBJECT (ruler), "position");
|
|
|
|
/* Make sure the ruler has been allocated already */
|
|
if (priv->backing_store != NULL)
|
|
gtk_ruler_draw_pos (ruler);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gtk_ruler_expose (GtkWidget *widget,
|
|
GdkEventExpose *event)
|
|
{
|
|
if (gtk_widget_is_drawable (widget))
|
|
{
|
|
GtkRuler *ruler = GTK_RULER (widget);
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
cairo_t *cr;
|
|
|
|
gtk_ruler_draw_ticks (ruler);
|
|
|
|
cr = gdk_cairo_create (widget->window);
|
|
gdk_cairo_set_source_pixmap (cr, priv->backing_store, 0, 0);
|
|
gdk_cairo_rectangle (cr, &event->area);
|
|
cairo_fill (cr);
|
|
cairo_destroy (cr);
|
|
|
|
gtk_ruler_draw_pos (ruler);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gtk_ruler_make_pixmap (GtkRuler *ruler)
|
|
{
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
GtkWidget *widget;
|
|
gint width;
|
|
gint height;
|
|
|
|
widget = GTK_WIDGET (ruler);
|
|
|
|
if (priv->backing_store)
|
|
{
|
|
gdk_drawable_get_size (priv->backing_store, &width, &height);
|
|
if ((width == widget->allocation.width) &&
|
|
(height == widget->allocation.height))
|
|
return;
|
|
|
|
g_object_unref (priv->backing_store);
|
|
}
|
|
|
|
priv->backing_store = gdk_pixmap_new (widget->window,
|
|
widget->allocation.width,
|
|
widget->allocation.height,
|
|
-1);
|
|
|
|
priv->xsrc = 0;
|
|
priv->ysrc = 0;
|
|
}
|
|
|
|
static void
|
|
gtk_ruler_real_draw_ticks (GtkRuler *ruler)
|
|
{
|
|
GtkWidget *widget = GTK_WIDGET (ruler);
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
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(private) (priv->orientation == GTK_ORIENTATION_HORIZONTAL ? "hruler" : "vruler");
|
|
|
|
gtk_paint_box (widget->style, priv->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 (priv->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 = priv->upper / priv->metric->pixels_per_unit;
|
|
lower = priv->lower / priv->metric->pixels_per_unit;
|
|
|
|
if ((upper - lower) == 0)
|
|
goto out;
|
|
|
|
increment = (gdouble) width / (upper - lower);
|
|
|
|
/* determine the scale H
|
|
* We calculate the text size as for the vruler, so that the result
|
|
* for the scale looks consistent with an accompanying vruler
|
|
*/
|
|
/* determine the scale V
|
|
* 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 (priv->max_size / priv->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 (priv->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 (priv->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) priv->metric->ruler_scale[scale] /
|
|
(gdouble) priv->metric->subdivide[i];
|
|
if (subd_incr * fabs(increment) <= MINIMUM_INCR)
|
|
continue;
|
|
|
|
/* Calculate the length of the tickmarks. Make sure that
|
|
* this length increases for each set of ticks
|
|
*/
|
|
ideal_length = height / (i + 1) - 1;
|
|
if (ideal_length > ++length)
|
|
length = ideal_length;
|
|
|
|
if (lower < upper)
|
|
{
|
|
start = floor (lower / subd_incr) * subd_incr;
|
|
end = ceil (upper / subd_incr) * subd_incr;
|
|
}
|
|
else
|
|
{
|
|
start = floor (upper / subd_incr) * subd_incr;
|
|
end = ceil (lower / subd_incr) * subd_incr;
|
|
}
|
|
|
|
for (cur = start; cur <= end; cur += subd_incr)
|
|
{
|
|
pos = ROUND ((cur - lower) * increment);
|
|
|
|
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,
|
|
priv->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,
|
|
priv->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_ruler_real_draw_pos (GtkRuler *ruler)
|
|
{
|
|
GtkWidget *widget = GTK_WIDGET (ruler);
|
|
GtkRulerPriv *priv = ruler->priv;
|
|
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 (priv->backing_store) {
|
|
cairo_t *cr = gdk_cairo_create (widget->window);
|
|
|
|
gdk_cairo_set_source_pixmap (cr, priv->backing_store, 0, 0);
|
|
cairo_rectangle (cr, priv->xsrc, priv->ysrc, bs_width, bs_height);
|
|
cairo_fill (cr);
|
|
|
|
cairo_destroy (cr);
|
|
}
|
|
|
|
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
|
|
{
|
|
increment = (gdouble) width / (priv->upper - priv->lower);
|
|
|
|
x = ROUND ((priv->position - priv->lower) * increment) + (xthickness - bs_width) / 2 - 1;
|
|
y = (height + bs_height) / 2 + ythickness;
|
|
}
|
|
else
|
|
{
|
|
increment = (gdouble) height / (priv->upper - priv->lower);
|
|
|
|
x = (width + bs_width) / 2 + xthickness;
|
|
y = ROUND ((priv->position - priv->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);
|
|
|
|
priv->xsrc = x;
|
|
priv->ysrc = y;
|
|
}
|
|
}
|
|
}
|