e6373738fc
We reverted GtkAdjustment to its traditional behaviour wrt. to clamping in 2.14.3, but the fix was lost between 2.14 and 2.16.
703 lines
19 KiB
C
703 lines
19 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 "gtkadjustment.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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enum
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{
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PROP_0,
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PROP_VALUE,
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PROP_LOWER,
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PROP_UPPER,
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PROP_STEP_INCREMENT,
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PROP_PAGE_INCREMENT,
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PROP_PAGE_SIZE
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};
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enum
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{
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CHANGED,
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VALUE_CHANGED,
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LAST_SIGNAL
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};
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static void gtk_adjustment_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_adjustment_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_adjustment_dispatch_properties_changed (GObject *object,
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guint n_pspecs,
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GParamSpec **pspecs);
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static guint adjustment_signals[LAST_SIGNAL] = { 0 };
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static guint64 adjustment_changed_stamp = 0; /* protected by global gdk lock */
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G_DEFINE_TYPE (GtkAdjustment, gtk_adjustment, GTK_TYPE_OBJECT)
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static void
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gtk_adjustment_class_init (GtkAdjustmentClass *class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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gobject_class->set_property = gtk_adjustment_set_property;
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gobject_class->get_property = gtk_adjustment_get_property;
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gobject_class->dispatch_properties_changed = gtk_adjustment_dispatch_properties_changed;
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class->changed = NULL;
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class->value_changed = NULL;
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/**
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* GtkAdjustment:value:
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*
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* The value of the adjustment.
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*
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* Since: 2.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_VALUE,
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g_param_spec_double ("value",
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P_("Value"),
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P_("The value of the adjustment"),
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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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* GtkAdjustment:lower:
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*
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* The minimum value of the adjustment.
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*
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* Since: 2.4
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*/
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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_("Minimum Value"),
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P_("The minimum value of the adjustment"),
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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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* GtkAdjustment:upper:
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*
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* The maximum value of the adjustment.
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* Note that values will be restricted by
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* <literal>upper - page-size</literal> if the page-size
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* property is nonzero.
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*
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* Since: 2.4
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*/
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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_("Maximum Value"),
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P_("The maximum value of the adjustment"),
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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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* GtkAdjustment:step-increment:
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*
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* The step increment of the adjustment.
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*
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* Since: 2.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_STEP_INCREMENT,
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g_param_spec_double ("step-increment",
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P_("Step Increment"),
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P_("The step increment of the adjustment"),
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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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* GtkAdjustment:page-increment:
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*
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* The page increment of the adjustment.
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*
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* Since: 2.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_PAGE_INCREMENT,
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g_param_spec_double ("page-increment",
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P_("Page Increment"),
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P_("The page increment of the adjustment"),
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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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* GtkAdjustment:page-size:
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*
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* The page size of the adjustment.
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* Note that the page-size is irrelevant and should be set to zero
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* if the adjustment is used for a simple scalar value, e.g. in a
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* #GtkSpinButton.
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*
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* Since: 2.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_PAGE_SIZE,
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g_param_spec_double ("page-size",
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P_("Page Size"),
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P_("The page size of the adjustment"),
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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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adjustment_signals[CHANGED] =
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g_signal_new (I_("changed"),
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G_OBJECT_CLASS_TYPE (class),
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G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
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G_STRUCT_OFFSET (GtkAdjustmentClass, changed),
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NULL, NULL,
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_gtk_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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adjustment_signals[VALUE_CHANGED] =
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g_signal_new (I_("value-changed"),
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G_OBJECT_CLASS_TYPE (class),
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G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
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G_STRUCT_OFFSET (GtkAdjustmentClass, value_changed),
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NULL, NULL,
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_gtk_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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}
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static void
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gtk_adjustment_init (GtkAdjustment *adjustment)
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{
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adjustment->value = 0.0;
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adjustment->lower = 0.0;
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adjustment->upper = 0.0;
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adjustment->step_increment = 0.0;
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adjustment->page_increment = 0.0;
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adjustment->page_size = 0.0;
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}
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static void
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gtk_adjustment_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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GtkAdjustment *adjustment = GTK_ADJUSTMENT (object);
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switch (prop_id)
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{
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case PROP_VALUE:
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g_value_set_double (value, adjustment->value);
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break;
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case PROP_LOWER:
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g_value_set_double (value, adjustment->lower);
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break;
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case PROP_UPPER:
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g_value_set_double (value, adjustment->upper);
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break;
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case PROP_STEP_INCREMENT:
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g_value_set_double (value, adjustment->step_increment);
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break;
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case PROP_PAGE_INCREMENT:
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g_value_set_double (value, adjustment->page_increment);
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break;
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case PROP_PAGE_SIZE:
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g_value_set_double (value, adjustment->page_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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static void
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gtk_adjustment_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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GtkAdjustment *adjustment = GTK_ADJUSTMENT (object);
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gdouble double_value = g_value_get_double (value);
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switch (prop_id)
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{
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case PROP_VALUE:
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gtk_adjustment_set_value (adjustment, double_value);
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break;
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case PROP_LOWER:
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adjustment->lower = double_value;
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break;
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case PROP_UPPER:
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adjustment->upper = double_value;
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break;
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case PROP_STEP_INCREMENT:
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adjustment->step_increment = double_value;
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break;
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case PROP_PAGE_INCREMENT:
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adjustment->page_increment = double_value;
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break;
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case PROP_PAGE_SIZE:
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adjustment->page_size = double_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_adjustment_dispatch_properties_changed (GObject *object,
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guint n_pspecs,
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GParamSpec **pspecs)
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{
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gboolean changed = FALSE;
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gint i;
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G_OBJECT_CLASS (gtk_adjustment_parent_class)->dispatch_properties_changed (object, n_pspecs, pspecs);
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for (i = 0; i < n_pspecs; i++)
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switch (pspecs[i]->param_id)
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{
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case PROP_LOWER:
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case PROP_UPPER:
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case PROP_STEP_INCREMENT:
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case PROP_PAGE_INCREMENT:
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case PROP_PAGE_SIZE:
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changed = TRUE;
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break;
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default:
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break;
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}
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if (changed)
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{
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adjustment_changed_stamp++;
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gtk_adjustment_changed (GTK_ADJUSTMENT (object));
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}
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}
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GtkObject *
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gtk_adjustment_new (gdouble value,
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gdouble lower,
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gdouble upper,
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gdouble step_increment,
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gdouble page_increment,
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gdouble page_size)
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{
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return g_object_new (GTK_TYPE_ADJUSTMENT,
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"lower", lower,
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"upper", upper,
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"step-increment", step_increment,
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"page-increment", page_increment,
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"page-size", page_size,
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"value", value,
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NULL);
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}
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/**
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* gtk_adjustment_get_value:
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* @adjustment: a #GtkAdjustment
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*
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* Gets the current value of the adjustment. See
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* gtk_adjustment_set_value ().
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*
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* Return value: The current value of the adjustment.
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**/
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gdouble
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gtk_adjustment_get_value (GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
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return adjustment->value;
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}
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void
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gtk_adjustment_set_value (GtkAdjustment *adjustment,
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gdouble value)
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{
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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value = CLAMP (value, adjustment->lower, adjustment->upper);
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if (value != adjustment->value)
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{
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adjustment->value = value;
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gtk_adjustment_value_changed (adjustment);
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}
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}
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/**
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* gtk_adjustment_get_lower:
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* @adjustment: a #GtkAdjustment
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*
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* Retrieves the minimum value of the adjustment.
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*
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* Return value: The current minimum value of the adjustment.
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*
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* Since: 2.14
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**/
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gdouble
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gtk_adjustment_get_lower (GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
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return adjustment->lower;
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}
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/**
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* gtk_adjustment_set_lower:
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* @adjustment: a #GtkAdjustment
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* @lower: the new minimum value
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*
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* Sets the minimum value of the adjustment.
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*
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* When setting multiple adjustment properties via their individual
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* setters, multiple "changed" signals will be emitted. However, since
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* the emission of the "changed" signal is tied to the emission of the
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* "GObject::notify" signals of the changed properties, it's possible
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* to compress the "changed" signals into one by calling
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* g_object_freeze_notify() and g_object_thaw_notify() around the
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* calls to the individual setters.
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*
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* Alternatively, using a single g_object_set() for all the properties
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* to change, or using gtk_adjustment_configure() has the same effect
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* of compressing "changed" emissions.
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*
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* Since: 2.14
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**/
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void
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gtk_adjustment_set_lower (GtkAdjustment *adjustment,
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gdouble lower)
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{
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (lower != adjustment->lower)
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g_object_set (adjustment, "lower", lower, NULL);
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}
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/**
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* gtk_adjustment_get_upper:
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* @adjustment: a #GtkAdjustment
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*
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* Retrieves the maximum value of the adjustment.
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*
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* Return value: The current maximum value of the adjustment.
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*
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* Since: 2.14
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**/
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gdouble
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gtk_adjustment_get_upper (GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
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return adjustment->upper;
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}
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/**
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* gtk_adjustment_set_upper:
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* @adjustment: a #GtkAdjustment
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* @upper: the new maximum value
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*
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* Sets the maximum value of the adjustment.
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*
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* Note that values will be restricted by
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* <literal>upper - page-size</literal> if the page-size
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* property is nonzero.
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*
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* See gtk_adjustment_set_lower() about how to compress multiple
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* emissions of the "changed" signal when setting multiple adjustment
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* properties.
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*
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* Since: 2.14
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**/
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void
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gtk_adjustment_set_upper (GtkAdjustment *adjustment,
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gdouble upper)
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{
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (upper != adjustment->upper)
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g_object_set (adjustment, "upper", upper, NULL);
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}
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/**
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* gtk_adjustment_get_step_increment:
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* @adjustment: a #GtkAdjustment
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*
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* Retrieves the step increment of the adjustment.
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*
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* Return value: The current step increment of the adjustment.
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*
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* Since: 2.14
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**/
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gdouble
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gtk_adjustment_get_step_increment (GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
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return adjustment->step_increment;
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}
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/**
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* gtk_adjustment_set_step_increment:
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* @adjustment: a #GtkAdjustment
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* @step_increment: the new step increment
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*
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* Sets the step increment of the adjustment.
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*
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* See gtk_adjustment_set_lower() about how to compress multiple
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* emissions of the "changed" signal when setting multiple adjustment
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* properties.
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*
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* Since: 2.14
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**/
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void
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gtk_adjustment_set_step_increment (GtkAdjustment *adjustment,
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gdouble step_increment)
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{
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (step_increment != adjustment->step_increment)
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g_object_set (adjustment, "step-increment", step_increment, NULL);
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}
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/**
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* gtk_adjustment_get_page_increment:
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* @adjustment: a #GtkAdjustment
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*
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* Retrieves the page increment of the adjustment.
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*
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* Return value: The current page increment of the adjustment.
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*
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* Since: 2.14
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**/
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gdouble
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gtk_adjustment_get_page_increment (GtkAdjustment *adjustment)
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{
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g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
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return adjustment->page_increment;
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}
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/**
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* gtk_adjustment_set_page_increment:
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* @adjustment: a #GtkAdjustment
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* @page_increment: the new page increment
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*
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* Sets the page increment of the adjustment.
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*
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* See gtk_adjustment_set_lower() about how to compress multiple
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* emissions of the "changed" signal when setting multiple adjustment
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* properties.
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*
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* Since: 2.14
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**/
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void
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gtk_adjustment_set_page_increment (GtkAdjustment *adjustment,
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gdouble page_increment)
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{
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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if (page_increment != adjustment->page_increment)
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g_object_set (adjustment, "page-increment", page_increment, NULL);
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}
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/**
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* gtk_adjustment_get_page_size:
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* @adjustment: a #GtkAdjustment
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*
|
|
* Retrieves the page size of the adjustment.
|
|
*
|
|
* Return value: The current page size of the adjustment.
|
|
*
|
|
* Since: 2.14
|
|
**/
|
|
gdouble
|
|
gtk_adjustment_get_page_size (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.0);
|
|
|
|
return adjustment->page_size;
|
|
}
|
|
|
|
/**
|
|
* gtk_adjustment_set_page_size:
|
|
* @adjustment: a #GtkAdjustment
|
|
* @page_size: the new page size
|
|
*
|
|
* Sets the page size of the adjustment.
|
|
*
|
|
* See gtk_adjustment_set_lower() about how to compress multiple
|
|
* emissions of the "changed" signal when setting multiple adjustment
|
|
* properties.
|
|
*
|
|
* Since: 2.14
|
|
**/
|
|
void
|
|
gtk_adjustment_set_page_size (GtkAdjustment *adjustment,
|
|
gdouble page_size)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
if (page_size != adjustment->page_size)
|
|
g_object_set (adjustment, "page-size", page_size, NULL);
|
|
}
|
|
|
|
/**
|
|
* gtk_adjustment_configure:
|
|
* @adjustment: a #GtkAdjustment
|
|
* @value: the new value
|
|
* @lower: the new minimum value
|
|
* @upper: the new maximum value
|
|
* @step_increment: the new step increment
|
|
* @page_increment: the new page increment
|
|
* @page_size: the new page size
|
|
*
|
|
* Sets all properties of the adjustment at once.
|
|
*
|
|
* Use this function to avoid multiple emissions of the "changed"
|
|
* signal. See gtk_adjustment_set_lower() for an alternative way
|
|
* of compressing multiple emissions of "changed" into one.
|
|
*
|
|
* Since: 2.14
|
|
**/
|
|
void
|
|
gtk_adjustment_configure (GtkAdjustment *adjustment,
|
|
gdouble value,
|
|
gdouble lower,
|
|
gdouble upper,
|
|
gdouble step_increment,
|
|
gdouble page_increment,
|
|
gdouble page_size)
|
|
{
|
|
gboolean value_changed = FALSE;
|
|
guint64 old_stamp = adjustment_changed_stamp;
|
|
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
g_object_freeze_notify (G_OBJECT (adjustment));
|
|
|
|
g_object_set (adjustment,
|
|
"lower", lower,
|
|
"upper", upper,
|
|
"step-increment", step_increment,
|
|
"page-increment", page_increment,
|
|
"page-size", page_size,
|
|
NULL);
|
|
|
|
/* don't use CLAMP() so we don't end up below lower if upper - page_size
|
|
* is smaller than lower
|
|
*/
|
|
value = MIN (value, upper - page_size);
|
|
value = MAX (value, lower);
|
|
|
|
if (value != adjustment->value)
|
|
{
|
|
/* set value manually to make sure "changed" is emitted with the
|
|
* new value in place and is emitted before "value-changed"
|
|
*/
|
|
adjustment->value = value;
|
|
value_changed = TRUE;
|
|
}
|
|
|
|
g_object_thaw_notify (G_OBJECT (adjustment));
|
|
|
|
if (old_stamp == adjustment_changed_stamp)
|
|
gtk_adjustment_changed (adjustment); /* force emission before ::value-changed */
|
|
|
|
if (value_changed)
|
|
gtk_adjustment_value_changed (adjustment);
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_changed (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
g_signal_emit (adjustment, adjustment_signals[CHANGED], 0);
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_value_changed (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
g_signal_emit (adjustment, adjustment_signals[VALUE_CHANGED], 0);
|
|
g_object_notify (G_OBJECT (adjustment), "value");
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_clamp_page (GtkAdjustment *adjustment,
|
|
gdouble lower,
|
|
gdouble upper)
|
|
{
|
|
gboolean need_emission;
|
|
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
lower = CLAMP (lower, adjustment->lower, adjustment->upper);
|
|
upper = CLAMP (upper, adjustment->lower, adjustment->upper);
|
|
|
|
need_emission = FALSE;
|
|
|
|
if (adjustment->value + adjustment->page_size < upper)
|
|
{
|
|
adjustment->value = upper - adjustment->page_size;
|
|
need_emission = TRUE;
|
|
}
|
|
if (adjustment->value > lower)
|
|
{
|
|
adjustment->value = lower;
|
|
need_emission = TRUE;
|
|
}
|
|
|
|
if (need_emission)
|
|
gtk_adjustment_value_changed (adjustment);
|
|
}
|
|
|
|
#define __GTK_ADJUSTMENT_C__
|
|
#include "gtkaliasdef.c"
|