wdisplays_github/src/glviewport.c

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/* SPDX-FileCopyrightText: 2020 Jason Francis <jason@cycles.network>
* SPDX-License-Identifier: GPL-3.0-or-later */
#include "glviewport.h"
typedef struct _WdGLViewportPrivate {
GtkAdjustment *hadjustment;
GtkAdjustment *vadjustment;
guint hscroll_policy : 1;
guint vscroll_policy : 1;
} WdGLViewportPrivate;
enum {
PROP_0,
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
PROP_HSCROLL_POLICY,
PROP_VSCROLL_POLICY
};
static void wd_gl_viewport_set_property(
GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void wd_gl_viewport_get_property(
GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
G_DEFINE_TYPE_WITH_CODE(WdGLViewport, wd_gl_viewport, GTK_TYPE_GL_AREA,
G_ADD_PRIVATE(WdGLViewport)
G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE, NULL))
static void wd_gl_viewport_class_init(WdGLViewportClass *class) {
GObjectClass *gobject_class = G_OBJECT_CLASS(class);
gobject_class->set_property = wd_gl_viewport_set_property;
gobject_class->get_property = wd_gl_viewport_get_property;
g_object_class_override_property(gobject_class, PROP_HADJUSTMENT, "hadjustment");
g_object_class_override_property(gobject_class, PROP_VADJUSTMENT, "vadjustment");
g_object_class_override_property(gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
g_object_class_override_property(gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
}
static void viewport_set_adjustment(GtkAdjustment *adjustment,
GtkAdjustment **store) {
if (!adjustment) {
adjustment = gtk_adjustment_new(0., 0., 0., 0., 0., 0.);
}
if (adjustment != *store) {
if (*store != NULL) {
g_object_unref(*store);
}
*store = adjustment;
g_object_ref_sink(adjustment);
}
}
static void wd_gl_viewport_set_property(
GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) {
WdGLViewport *viewport = WD_GL_VIEWPORT(object);
WdGLViewportPrivate *priv = wd_gl_viewport_get_instance_private(viewport);
switch (prop_id) {
case PROP_HADJUSTMENT:
viewport_set_adjustment(g_value_get_object(value), &priv->hadjustment);
break;
case PROP_VADJUSTMENT:
viewport_set_adjustment(g_value_get_object(value), &priv->vadjustment);
break;
case PROP_HSCROLL_POLICY:
if (priv->hscroll_policy != g_value_get_enum(value)) {
priv->hscroll_policy = g_value_get_enum(value);
g_object_notify_by_pspec(object, pspec);
}
break;
case PROP_VSCROLL_POLICY:
if (priv->vscroll_policy != g_value_get_enum(value)) {
priv->vscroll_policy = g_value_get_enum(value);
g_object_notify_by_pspec (object, pspec);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void wd_gl_viewport_get_property(
GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) {
WdGLViewport *viewport = WD_GL_VIEWPORT(object);
WdGLViewportPrivate *priv = wd_gl_viewport_get_instance_private(viewport);
switch (prop_id) {
case PROP_HADJUSTMENT:
g_value_set_object(value, priv->hadjustment);
break;
case PROP_VADJUSTMENT:
g_value_set_object(value, priv->vadjustment);
break;
case PROP_HSCROLL_POLICY:
g_value_set_enum(value, priv->hscroll_policy);
break;
case PROP_VSCROLL_POLICY:
g_value_set_enum(value, priv->vscroll_policy);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void wd_gl_viewport_init(WdGLViewport *viewport) {
}
GtkWidget *wd_gl_viewport_new(void) {
return gtk_widget_new(WD_TYPE_GL_VIEWPORT, NULL);
}