forked from AuroraMiddleware/gtk
4e2b60ac4d
Wed Jul 18 19:28:46 2001 Owen Taylor <otaylor@redhat.com> * gtk/*.c: Patch from Matthias Clasen to remove remove all instances of g_return_if_fail (foo != NULL); that are immediately before a g_return_if_fail (GTK_IS_FOO (foo)); since the second check catches the NULL anyways.
488 lines
12 KiB
C
488 lines
12 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 "gtkruler.h"
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#include "gtkintl.h"
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enum {
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PROP_0,
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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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};
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static void gtk_ruler_class_init (GtkRulerClass *klass);
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static void gtk_ruler_init (GtkRuler *ruler);
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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_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint 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_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 GtkWidgetClass *parent_class;
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static const GtkRulerMetric ruler_metrics[] =
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{
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{"Pixels", "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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GtkType
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gtk_ruler_get_type (void)
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{
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static GtkType ruler_type = 0;
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if (!ruler_type)
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{
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static const GtkTypeInfo ruler_info =
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{
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"GtkRuler",
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sizeof (GtkRuler),
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sizeof (GtkRulerClass),
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(GtkClassInitFunc) gtk_ruler_class_init,
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(GtkObjectInitFunc) gtk_ruler_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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ruler_type = gtk_type_unique (GTK_TYPE_WIDGET, &ruler_info);
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}
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return ruler_type;
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}
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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;
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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gobject_class = G_OBJECT_CLASS (class);
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object_class = (GtkObjectClass*) class;
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widget_class = (GtkWidgetClass*) class;
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parent_class = gtk_type_class (GTK_TYPE_WIDGET);
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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_allocate = gtk_ruler_size_allocate;
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widget_class->expose_event = gtk_ruler_expose;
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class->draw_ticks = NULL;
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class->draw_pos = NULL;
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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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_("Lower"),
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_("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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G_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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_("Upper"),
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_("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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G_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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_("Position"),
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_("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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G_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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_("Max Size"),
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_("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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G_PARAM_READWRITE));
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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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ruler->backing_store = NULL;
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ruler->non_gr_exp_gc = NULL;
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ruler->xsrc = 0;
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ruler->ysrc = 0;
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ruler->slider_size = 0;
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ruler->lower = 0;
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ruler->upper = 0;
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ruler->position = 0;
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ruler->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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switch (prop_id)
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{
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case PROP_LOWER:
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gtk_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,
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ruler->position, ruler->max_size);
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break;
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case PROP_UPPER:
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gtk_ruler_set_range (ruler, ruler->lower, g_value_get_double (value),
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ruler->position, ruler->max_size);
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break;
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case PROP_POSITION:
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gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
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g_value_get_double (value), ruler->max_size);
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break;
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case PROP_MAX_SIZE:
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gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
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ruler->position, g_value_get_double (value));
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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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switch (prop_id)
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{
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case PROP_LOWER:
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g_value_set_double (value, ruler->lower);
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break;
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case PROP_UPPER:
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g_value_set_double (value, ruler->upper);
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break;
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case PROP_POSITION:
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g_value_set_double (value, ruler->position);
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break;
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case PROP_MAX_SIZE:
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g_value_set_double (value, ruler->max_size);
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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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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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g_return_if_fail (GTK_IS_RULER (ruler));
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ruler->metric = (GtkRulerMetric *) &ruler_metrics[metric];
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if (GTK_WIDGET_DRAWABLE (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_metric:
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* @ruler: a #GtkRuler
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*
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* Gets the units used for a #GtkRule . 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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gint i;
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g_return_val_if_fail (GTK_IS_RULER (ruler), 0);
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for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)
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if (ruler->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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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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g_return_if_fail (GTK_IS_RULER (ruler));
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if (ruler->lower != lower)
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{
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ruler->lower = lower;
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g_object_notify (G_OBJECT (ruler), "lower");
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}
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if (ruler->upper != upper)
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{
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ruler->upper = upper;
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g_object_notify (G_OBJECT (ruler), "upper");
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}
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if (ruler->position != position)
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{
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ruler->position = position;
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g_object_notify (G_OBJECT (ruler), "position");
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}
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if (ruler->max_size != max_size)
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{
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ruler->max_size = max_size;
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g_object_notify (G_OBJECT (ruler), "max_size");
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}
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if (GTK_WIDGET_DRAWABLE (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: location to store lower limit of the ruler, or %NULL
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* @upper: location to store upper limit of the ruler, or %NULL
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* @position: 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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g_return_if_fail (GTK_IS_RULER (ruler));
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if (lower)
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*lower = ruler->lower;
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if (upper)
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*upper = ruler->upper;
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if (position)
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*position = ruler->position;
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if (max_size)
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*max_size = ruler->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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g_return_if_fail (GTK_IS_RULER (widget));
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ruler = GTK_RULER (widget);
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GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
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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;
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g_return_if_fail (GTK_IS_RULER (widget));
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ruler = GTK_RULER (widget);
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if (ruler->backing_store)
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gdk_pixmap_unref (ruler->backing_store);
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if (ruler->non_gr_exp_gc)
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gdk_gc_destroy (ruler->non_gr_exp_gc);
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ruler->backing_store = NULL;
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ruler->non_gr_exp_gc = NULL;
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if (GTK_WIDGET_CLASS (parent_class)->unrealize)
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(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
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}
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static void
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gtk_ruler_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkRuler *ruler;
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g_return_if_fail (GTK_IS_RULER (widget));
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ruler = GTK_RULER (widget);
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widget->allocation = *allocation;
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if (GTK_WIDGET_REALIZED (widget))
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{
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gdk_window_move_resize (widget->window,
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allocation->x, allocation->y,
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allocation->width, allocation->height);
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gtk_ruler_make_pixmap (ruler);
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}
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}
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static gint
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gtk_ruler_expose (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GtkRuler *ruler;
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g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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ruler = GTK_RULER (widget);
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gtk_ruler_draw_ticks (ruler);
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gdk_draw_pixmap (widget->window,
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ruler->non_gr_exp_gc,
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ruler->backing_store,
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0, 0, 0, 0,
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widget->allocation.width,
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widget->allocation.height);
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gtk_ruler_draw_pos (ruler);
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}
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return FALSE;
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}
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static void
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gtk_ruler_make_pixmap (GtkRuler *ruler)
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{
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GtkWidget *widget;
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gint width;
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gint height;
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widget = GTK_WIDGET (ruler);
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if (ruler->backing_store)
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{
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gdk_window_get_size (ruler->backing_store, &width, &height);
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if ((width == widget->allocation.width) &&
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(height == widget->allocation.height))
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return;
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gdk_pixmap_unref (ruler->backing_store);
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}
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ruler->backing_store = gdk_pixmap_new (widget->window,
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widget->allocation.width,
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widget->allocation.height,
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-1);
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ruler->xsrc = 0;
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ruler->ysrc = 0;
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if (!ruler->non_gr_exp_gc)
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{
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ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
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gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);
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}
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}
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