forked from AuroraMiddleware/gtk
357 lines
11 KiB
C
357 lines
11 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright © 2013 Carlos Garnacho <carlosg@gnome.org>
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtk/gtk.h"
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#include "gtkmagnifierprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtksnapshot.h"
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#include "gtkintl.h"
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enum {
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PROP_INSPECTED = 1,
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PROP_RESIZE,
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PROP_MAGNIFICATION
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};
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typedef struct _GtkMagnifierPrivate GtkMagnifierPrivate;
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struct _GtkMagnifierPrivate
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{
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GdkPaintable *paintable;
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gdouble magnification;
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gint x;
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gint y;
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gboolean resize;
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GtkMagnifier, gtk_magnifier,
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GTK_TYPE_WIDGET)
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static void
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_gtk_magnifier_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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switch (param_id)
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{
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case PROP_INSPECTED:
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_gtk_magnifier_set_inspected (GTK_MAGNIFIER (object),
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g_value_get_object (value));
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break;
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case PROP_MAGNIFICATION:
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_gtk_magnifier_set_magnification (GTK_MAGNIFIER (object),
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g_value_get_double (value));
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break;
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case PROP_RESIZE:
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_gtk_magnifier_set_resize (GTK_MAGNIFIER (object),
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g_value_get_boolean (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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}
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}
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static void
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_gtk_magnifier_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkMagnifier *magnifier;
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GtkMagnifierPrivate *priv;
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magnifier = GTK_MAGNIFIER (object);
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priv = gtk_magnifier_get_instance_private (magnifier);
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switch (param_id)
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{
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case PROP_INSPECTED:
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g_value_set_object (value, gtk_widget_paintable_get_widget (GTK_WIDGET_PAINTABLE (priv->paintable)));
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break;
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case PROP_MAGNIFICATION:
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g_value_set_double (value, priv->magnification);
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break;
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case PROP_RESIZE:
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g_value_set_boolean (value, priv->resize);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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}
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}
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static void
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gtk_magnifier_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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GtkMagnifier *magnifier = GTK_MAGNIFIER (widget);
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (magnifier);
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double width, height, paintable_width, paintable_height;
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if (gtk_widget_paintable_get_widget (GTK_WIDGET_PAINTABLE (priv->paintable)) == NULL)
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return;
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width = gtk_widget_get_width (widget);
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height = gtk_widget_get_height (widget);
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paintable_width = gdk_paintable_get_intrinsic_width (priv->paintable);
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paintable_height = gdk_paintable_get_intrinsic_height (priv->paintable);
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if (paintable_width <= 0.0 || paintable_height <= 0.0)
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return;
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gtk_snapshot_save (snapshot);
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if (!priv->resize)
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (width / 2, height / 2));
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gtk_snapshot_scale (snapshot, priv->magnification, priv->magnification);
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (
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- CLAMP (priv->x, 0, paintable_width),
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- CLAMP (priv->y, 0, paintable_height)));
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gdk_paintable_snapshot (priv->paintable, snapshot, paintable_width, paintable_height);
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gtk_snapshot_restore (snapshot);
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}
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static void
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gtk_magnifier_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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GtkMagnifier *magnifier = GTK_MAGNIFIER (widget);
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (magnifier);
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gint size;
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if (priv->resize)
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{
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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size = priv->magnification * gdk_paintable_get_intrinsic_width (priv->paintable);
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else
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size = priv->magnification * gdk_paintable_get_intrinsic_height (priv->paintable);
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}
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else
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size = 0;
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*minimum = size;
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*natural = size;
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}
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static void
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gtk_magnifier_dispose (GObject *object)
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{
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GtkMagnifier *self = GTK_MAGNIFIER (object);
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (self);
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if (priv->paintable)
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_gtk_magnifier_set_inspected (self, NULL);
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g_clear_object (&priv->paintable);
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G_OBJECT_CLASS (gtk_magnifier_parent_class)->dispose (object);
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}
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static void
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gtk_magnifier_class_init (GtkMagnifierClass *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->set_property = _gtk_magnifier_set_property;
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object_class->get_property = _gtk_magnifier_get_property;
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object_class->dispose = gtk_magnifier_dispose;
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widget_class->snapshot = gtk_magnifier_snapshot;
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widget_class->measure = gtk_magnifier_measure;
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g_object_class_install_property (object_class,
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PROP_INSPECTED,
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g_param_spec_object ("inspected",
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P_("Inspected"),
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P_("Inspected widget"),
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GTK_TYPE_WIDGET,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_MAGNIFICATION,
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g_param_spec_double ("magnification",
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P_("magnification"),
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P_("magnification"),
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1, G_MAXDOUBLE, 1,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_RESIZE,
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g_param_spec_boolean ("resize",
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P_("resize"),
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P_("resize"),
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FALSE,
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G_PARAM_READWRITE));
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}
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static void
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gtk_magnifier_init (GtkMagnifier *self)
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{
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (self);
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GtkWidget *widget = GTK_WIDGET (self);
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gtk_widget_set_overflow (widget, GTK_OVERFLOW_HIDDEN);
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priv->magnification = 1;
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priv->resize = FALSE;
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priv->paintable = gtk_widget_paintable_new (NULL);
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g_signal_connect_swapped (priv->paintable, "invalidate-contents", G_CALLBACK (gtk_widget_queue_draw), self);
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g_signal_connect_swapped (priv->paintable, "invalidate-size", G_CALLBACK (gtk_widget_queue_resize), self);
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}
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GtkWidget *
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_gtk_magnifier_new (GtkWidget *inspected)
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{
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g_return_val_if_fail (GTK_IS_WIDGET (inspected), NULL);
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return g_object_new (GTK_TYPE_MAGNIFIER,
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"inspected", inspected,
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NULL);
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}
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GtkWidget *
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_gtk_magnifier_get_inspected (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (magnifier);
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g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), NULL);
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return gtk_widget_paintable_get_widget (GTK_WIDGET_PAINTABLE (priv->paintable));
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}
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void
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_gtk_magnifier_set_inspected (GtkMagnifier *magnifier,
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GtkWidget *inspected)
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{
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GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (magnifier);
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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g_return_if_fail (inspected == NULL || GTK_IS_WIDGET (inspected));
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gtk_widget_paintable_set_widget (GTK_WIDGET_PAINTABLE (priv->paintable), inspected);
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g_object_notify (G_OBJECT (magnifier), "inspected");
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}
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void
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_gtk_magnifier_set_coords (GtkMagnifier *magnifier,
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gdouble x,
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gdouble y)
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{
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GtkMagnifierPrivate *priv;
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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priv = gtk_magnifier_get_instance_private (magnifier);
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if (priv->x == x && priv->y == y)
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return;
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priv->x = x;
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priv->y = y;
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if (gtk_widget_is_visible (GTK_WIDGET (magnifier)))
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gtk_widget_queue_draw (GTK_WIDGET (magnifier));
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}
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void
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_gtk_magnifier_get_coords (GtkMagnifier *magnifier,
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gdouble *x,
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gdouble *y)
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{
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GtkMagnifierPrivate *priv;
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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priv = gtk_magnifier_get_instance_private (magnifier);
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if (x)
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*x = priv->x;
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if (y)
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*y = priv->y;
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}
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void
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_gtk_magnifier_set_magnification (GtkMagnifier *magnifier,
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gdouble magnification)
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{
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GtkMagnifierPrivate *priv;
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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priv = gtk_magnifier_get_instance_private (magnifier);
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if (priv->magnification == magnification)
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return;
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priv->magnification = magnification;
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g_object_notify (G_OBJECT (magnifier), "magnification");
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if (priv->resize)
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gtk_widget_queue_resize (GTK_WIDGET (magnifier));
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if (gtk_widget_is_visible (GTK_WIDGET (magnifier)))
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gtk_widget_queue_draw (GTK_WIDGET (magnifier));
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}
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gdouble
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_gtk_magnifier_get_magnification (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), 1);
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priv = gtk_magnifier_get_instance_private (magnifier);
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return priv->magnification;
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}
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void
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_gtk_magnifier_set_resize (GtkMagnifier *magnifier,
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gboolean resize)
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{
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GtkMagnifierPrivate *priv;
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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priv = gtk_magnifier_get_instance_private (magnifier);
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if (priv->resize == resize)
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return;
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priv->resize = resize;
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gtk_widget_queue_resize (GTK_WIDGET (magnifier));
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}
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gboolean
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_gtk_magnifier_get_resize (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), FALSE);
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priv = gtk_magnifier_get_instance_private (magnifier);
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return priv->resize;
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}
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