mirror of
https://gitlab.gnome.org/GNOME/libmks.git
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300 lines
7.8 KiB
C
300 lines
7.8 KiB
C
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/* mks-display.c
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*
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* Copyright 2023 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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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "config.h"
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#include "mks-display.h"
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#include "mks-screen.h"
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typedef struct
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{
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GdkPaintable *paintable;
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MksScreen *screen;
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} MksDisplayPrivate;
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enum {
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PROP_0,
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PROP_SCREEN,
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N_PROPS
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};
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G_DEFINE_TYPE_WITH_PRIVATE (MksDisplay, mks_display, GTK_TYPE_WIDGET)
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static GParamSpec *properties [N_PROPS];
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static void
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mks_display_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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MksDisplay *self = (MksDisplay *)widget;
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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GtkAllocation alloc;
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double width;
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double height;
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g_assert (MKS_IS_DISPLAY (self));
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g_assert (GTK_IS_SNAPSHOT (snapshot));
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if (priv->paintable == NULL)
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return;
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gtk_widget_get_allocation (widget, &alloc);
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width = gdk_paintable_get_intrinsic_width (priv->paintable);
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height = gdk_paintable_get_intrinsic_height (priv->paintable);
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gtk_snapshot_scale (snapshot,
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alloc.width / width,
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alloc.height / height);
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gdk_paintable_snapshot (priv->paintable, snapshot, width, height);
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}
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static void
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mks_display_attach_cb (GObject *object,
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GAsyncResult *result,
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gpointer user_data)
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{
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g_autoptr(MksDisplay) self = user_data;
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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MksScreen *screen = (MksScreen *)object;
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g_autoptr(GdkPaintable) paintable = NULL;
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g_autoptr(GError) error = NULL;
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g_assert (MKS_IS_SCREEN (screen));
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g_assert (G_IS_ASYNC_RESULT (result));
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g_assert (MKS_IS_DISPLAY (self));
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paintable = mks_screen_attach_finish (screen, result, &error);
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if (priv->screen != screen)
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return;
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if (g_set_object (&priv->paintable, paintable))
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{
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g_signal_connect_object (priv->paintable,
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"invalidate-size",
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G_CALLBACK (gtk_widget_queue_resize),
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self,
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G_CONNECT_SWAPPED);
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g_signal_connect_object (priv->paintable,
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"invalidate-contents",
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G_CALLBACK (gtk_widget_queue_draw),
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self,
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G_CONNECT_SWAPPED);
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}
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gtk_widget_queue_resize (GTK_WIDGET (self));
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}
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static void
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mks_display_connect (MksDisplay *self,
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MksScreen *screen)
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{
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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g_assert (MKS_IS_DISPLAY (self));
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g_assert (priv->screen == NULL);
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g_set_object (&priv->screen, screen);
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mks_screen_attach (screen,
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NULL,
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mks_display_attach_cb,
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g_object_ref (self));
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}
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static void
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mks_display_disconnect (MksDisplay *self)
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{
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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g_assert (MKS_IS_DISPLAY (self));
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g_assert (priv->screen != NULL);
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g_clear_object (&priv->screen);
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g_clear_object (&priv->paintable);
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}
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static void
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mks_display_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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MksDisplay *self = (MksDisplay *)widget;
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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g_assert (MKS_IS_DISPLAY (self));
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*minimum_baseline = -1;
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*natural_baseline = -1;
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*minimum = 0;
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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{
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if (priv->paintable != NULL)
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*natural = gdk_paintable_get_intrinsic_width (priv->paintable);
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else
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*natural = 0;
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}
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else
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{
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if (priv->paintable != NULL)
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*natural = gdk_paintable_get_intrinsic_width (priv->paintable)
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* gdk_paintable_get_intrinsic_aspect_ratio (priv->paintable);
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else
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*natural = 0;
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}
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}
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static GtkSizeRequestMode
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mks_display_get_request_mode (GtkWidget *widget)
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{
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return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
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}
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static void
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mks_display_dispose (GObject *object)
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{
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MksDisplay *self = (MksDisplay *)object;
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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if (priv->screen != NULL)
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mks_display_disconnect (self);
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g_clear_object (&priv->paintable);
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g_clear_object (&priv->screen);
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G_OBJECT_CLASS (mks_display_parent_class)->dispose (object);
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}
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static void
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mks_display_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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MksDisplay *self = MKS_DISPLAY (object);
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switch (prop_id)
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{
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case PROP_SCREEN:
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g_value_set_object (value, mks_display_get_screen (self));
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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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mks_display_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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MksDisplay *self = MKS_DISPLAY (object);
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switch (prop_id)
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{
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case PROP_SCREEN:
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mks_display_set_screen (self, g_value_get_object (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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}
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}
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static void
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mks_display_class_init (MksDisplayClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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object_class->dispose = mks_display_dispose;
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object_class->get_property = mks_display_get_property;
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object_class->set_property = mks_display_set_property;
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widget_class->snapshot = mks_display_snapshot;
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widget_class->measure = mks_display_measure;
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widget_class->get_request_mode = mks_display_get_request_mode;
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properties[PROP_SCREEN] =
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g_param_spec_object ("screen", NULL, NULL,
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MKS_TYPE_SCREEN,
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(G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
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g_object_class_install_properties (object_class, N_PROPS, properties);
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}
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static void
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mks_display_init (MksDisplay *self)
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{
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}
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GtkWidget *
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mks_display_new (void)
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{
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return g_object_new (MKS_TYPE_DISPLAY, NULL);
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}
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/**
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* mks_display_get_screen:
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* @self: a #MksDisplay
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*
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* Gets the screen connected to the display.
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*
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* Returns: (transfer none): a #MksScreen
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*/
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MksScreen *
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mks_display_get_screen (MksDisplay *self)
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{
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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g_return_val_if_fail (MKS_IS_DISPLAY (self), NULL);
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return priv->screen;
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}
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void
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mks_display_set_screen (MksDisplay *self,
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MksScreen *screen)
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{
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MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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g_return_if_fail (MKS_IS_DISPLAY (self));
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if (priv->screen == screen)
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return;
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if (priv->screen != NULL)
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mks_display_disconnect (self);
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if (screen != NULL)
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mks_display_connect (self, screen);
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SCREEN]);
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}
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