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8d8c879384
We can avoid using the inline scrollbar in favor of overlay scrolling if we bridge the adjustment into the GtkViewport. This sadly requires us to subclass things to get it just right.
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/* sp-viewport.c
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*
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* Copyright (C) 2016 Christian Hergert <chergert@redhat.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* This is meant to act like GtkViewport but allow us to override the
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* GtkAdjustment without having viewport change our values.
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*/
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#define G_LOG_DOMAIN "sp-viewport"
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#include "sp-viewport.h"
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struct _SpViewport
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{
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GtkViewport parent_instance;
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GtkAdjustment *hadjustment;
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GtkAdjustment *vadjustment;
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};
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G_DEFINE_TYPE (SpViewport, sp_viewport, GTK_TYPE_VIEWPORT)
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enum {
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PROP_0,
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N_PROPS,
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/* Overridden properties */
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PROP_HADJUSTMENT,
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PROP_VADJUSTMENT,
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};
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static void
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sp_viewport_finalize (GObject *object)
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{
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SpViewport *self = (SpViewport *)object;
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g_clear_object (&self->hadjustment);
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g_clear_object (&self->vadjustment);
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G_OBJECT_CLASS (sp_viewport_parent_class)->finalize (object);
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}
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static void
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sp_viewport_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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SpViewport *self = SP_VIEWPORT (object);
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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g_value_set_object (value, self->hadjustment);
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break;
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case PROP_VADJUSTMENT:
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g_value_set_object (value, self->vadjustment);
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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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}
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}
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static void
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sp_viewport_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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SpViewport *self = SP_VIEWPORT (object);
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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g_clear_object (&self->hadjustment);
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self->hadjustment = g_value_dup_object (value);
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g_object_notify_by_pspec (object, pspec);
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break;
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case PROP_VADJUSTMENT:
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g_clear_object (&self->vadjustment);
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self->vadjustment = g_value_dup_object (value);
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g_object_notify_by_pspec (object, pspec);
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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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}
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}
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static void
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sp_viewport_class_init (SpViewportClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->set_property = sp_viewport_set_property;
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object_class->get_property = sp_viewport_get_property;
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object_class->finalize = sp_viewport_finalize;
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g_object_class_override_property (object_class, PROP_HADJUSTMENT, "hadjustment");
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g_object_class_override_property (object_class, PROP_VADJUSTMENT, "vadjustment");
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}
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static void
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sp_viewport_init (SpViewport *self)
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{
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self->hadjustment = gtk_adjustment_new (0, 0, 0, 0, 0, 0);
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self->vadjustment = gtk_adjustment_new (0, 0, 0, 0, 0, 0);
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}
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