2013-12-11 14:42:10 +00:00
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/* 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 "gtkintl.h"
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enum {
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PROP_INSPECTED = 1,
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2014-12-21 00:16:46 +00:00
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PROP_RESIZE,
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2013-12-11 14:42:10 +00:00
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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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GtkWidget *inspected;
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gdouble magnification;
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gint x;
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gint y;
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2014-12-21 00:16:46 +00:00
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gboolean resize;
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gulong draw_handler;
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gulong resize_handler;
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2013-12-11 14:42:10 +00:00
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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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2014-12-21 00:16:46 +00:00
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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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2013-12-11 14:42:10 +00:00
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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, priv->inspected);
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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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2014-12-21 00:16:46 +00:00
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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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2013-12-11 14:42:10 +00:00
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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 gboolean
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_gtk_magnifier_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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GtkAllocation allocation, inspected_alloc;
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GtkMagnifier *magnifier;
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GtkMagnifierPrivate *priv;
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gdouble x, y;
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magnifier = GTK_MAGNIFIER (widget);
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priv = _gtk_magnifier_get_instance_private (magnifier);
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2014-12-21 00:16:46 +00:00
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if (priv->inspected == NULL)
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return FALSE;
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2013-12-11 14:42:10 +00:00
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if (!gtk_widget_is_visible (priv->inspected))
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return FALSE;
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gtk_widget_get_allocation (widget, &allocation);
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gtk_widget_get_allocation (priv->inspected, &inspected_alloc);
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2014-12-21 00:16:46 +00:00
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if (!priv->resize)
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cairo_translate (cr, allocation.width / 2, allocation.height / 2);
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2013-12-11 14:42:10 +00:00
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x = CLAMP (priv->x, 0, inspected_alloc.width);
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y = CLAMP (priv->y, 0, inspected_alloc.height);
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cairo_save (cr);
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cairo_scale (cr, priv->magnification, priv->magnification);
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cairo_translate (cr, -x, -y);
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2014-12-21 00:16:46 +00:00
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g_signal_handler_block (priv->inspected, priv->draw_handler);
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2013-12-11 14:42:10 +00:00
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gtk_widget_draw (priv->inspected, cr);
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2014-12-21 00:16:46 +00:00
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g_signal_handler_unblock (priv->inspected, priv->draw_handler);
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2013-12-11 14:42:10 +00:00
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cairo_restore (cr);
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return TRUE;
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}
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2014-12-21 00:16:46 +00:00
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static void
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gtk_magnifier_get_preferred_width (GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width)
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{
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GtkMagnifier *magnifier;
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GtkMagnifierPrivate *priv;
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gint width;
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magnifier = GTK_MAGNIFIER (widget);
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priv = _gtk_magnifier_get_instance_private (magnifier);
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if (priv->resize && priv->inspected)
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width = priv->magnification * gtk_widget_get_allocated_width (priv->inspected);
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else
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width = 0;
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*minimum_width = width;
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*natural_width = width;
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}
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static void
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gtk_magnifier_get_preferred_height (GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height)
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{
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GtkMagnifier *magnifier;
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GtkMagnifierPrivate *priv;
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gint height;
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magnifier = GTK_MAGNIFIER (widget);
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priv = _gtk_magnifier_get_instance_private (magnifier);
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if (priv->resize && priv->inspected)
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height = priv->magnification * gtk_widget_get_allocated_height (priv->inspected);
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else
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height = 0;
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*minimum_height = height;
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*natural_height = height;
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}
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static void
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resize_handler (GtkWidget *widget,
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GtkAllocation *alloc,
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GtkWidget *magnifier)
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{
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gtk_widget_queue_resize (magnifier);
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}
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static void
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connect_resize_handler (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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priv = _gtk_magnifier_get_instance_private (magnifier);
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if (priv->inspected && priv->resize)
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priv->resize_handler = g_signal_connect (priv->inspected, "size-allocate",
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G_CALLBACK (resize_handler), magnifier);
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}
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static void
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disconnect_resize_handler (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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priv = _gtk_magnifier_get_instance_private (magnifier);
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if (priv->resize_handler)
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{
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2016-02-09 14:30:00 +00:00
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if (priv->inspected)
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g_signal_handler_disconnect (priv->inspected, priv->resize_handler);
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2014-12-21 00:16:46 +00:00
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priv->resize_handler = 0;
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}
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}
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static gboolean
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draw_handler (GtkWidget *widget,
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cairo_t *cr,
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GtkWidget *magnifier)
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{
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gtk_widget_queue_draw (magnifier);
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return FALSE;
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}
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static void
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connect_draw_handler (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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priv = _gtk_magnifier_get_instance_private (magnifier);
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2016-04-19 19:27:08 +00:00
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if (!priv->draw_handler)
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{
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if (priv->inspected)
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priv->draw_handler = g_signal_connect (priv->inspected, "draw",
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G_CALLBACK (draw_handler), magnifier);
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}
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2014-12-21 00:16:46 +00:00
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}
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static void
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disconnect_draw_handler (GtkMagnifier *magnifier)
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{
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GtkMagnifierPrivate *priv;
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priv = _gtk_magnifier_get_instance_private (magnifier);
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if (priv->draw_handler)
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{
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2016-02-09 14:30:00 +00:00
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if (priv->inspected)
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g_signal_handler_disconnect (priv->inspected, priv->draw_handler);
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2014-12-21 00:16:46 +00:00
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priv->draw_handler = 0;
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}
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}
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static void
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_gtk_magnifier_destroy (GtkWidget *widget)
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{
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_gtk_magnifier_set_inspected (GTK_MAGNIFIER (widget), NULL);
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GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->destroy (widget);
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}
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2016-04-19 19:27:08 +00:00
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static void
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gtk_magnifier_map (GtkWidget *widget)
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{
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connect_draw_handler (GTK_MAGNIFIER (widget));
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GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->map (widget);
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}
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static void
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gtk_magnifier_unmap (GtkWidget *widget)
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{
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GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->unmap (widget);
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disconnect_draw_handler (GTK_MAGNIFIER (widget));
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}
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2013-12-11 14:42:10 +00:00
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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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2014-12-21 00:16:46 +00:00
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widget_class->destroy = _gtk_magnifier_destroy;
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2013-12-11 14:42:10 +00:00
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widget_class->draw = _gtk_magnifier_draw;
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2014-12-21 00:16:46 +00:00
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widget_class->get_preferred_width = gtk_magnifier_get_preferred_width;
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widget_class->get_preferred_height = gtk_magnifier_get_preferred_height;
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2016-04-19 19:27:08 +00:00
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widget_class->map = gtk_magnifier_map;
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widget_class->unmap = gtk_magnifier_unmap;
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2013-12-11 14:42:10 +00:00
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g_object_class_install_property (object_class,
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PROP_INSPECTED,
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2014-02-07 07:17:11 +00:00
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g_param_spec_object ("inspected",
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2013-12-11 14:42:10 +00:00
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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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2014-02-07 07:17:11 +00:00
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g_param_spec_double ("magnification",
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2013-12-11 14:42:10 +00:00
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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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2014-12-21 00:16:46 +00:00
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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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2013-12-11 14:42:10 +00:00
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}
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static void
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_gtk_magnifier_init (GtkMagnifier *magnifier)
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{
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GtkWidget *widget = GTK_WIDGET (magnifier);
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GtkMagnifierPrivate *priv;
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priv = _gtk_magnifier_get_instance_private (magnifier);
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gtk_widget_set_events (widget,
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2015-09-14 08:56:13 +00:00
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gtk_widget_get_events (widget));
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2013-12-11 14:42:10 +00:00
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gtk_widget_set_has_window (widget, FALSE);
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priv->magnification = 1;
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2014-12-21 00:16:46 +00:00
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priv->resize = FALSE;
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2013-12-11 14:42:10 +00:00
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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;
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g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), NULL);
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priv = _gtk_magnifier_get_instance_private (magnifier);
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return priv->inspected;
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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;
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2014-01-22 19:48:51 +00:00
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g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
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2013-12-11 14:42:10 +00:00
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|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
if (priv->inspected == inspected)
|
|
|
|
return;
|
|
|
|
|
2014-12-21 00:16:46 +00:00
|
|
|
disconnect_draw_handler (magnifier);
|
|
|
|
disconnect_resize_handler (magnifier);
|
|
|
|
|
2016-02-09 14:30:00 +00:00
|
|
|
if (priv->inspected)
|
|
|
|
g_object_remove_weak_pointer (G_OBJECT (priv->inspected),
|
|
|
|
(gpointer *) &priv->inspected);
|
2013-12-11 14:42:10 +00:00
|
|
|
priv->inspected = inspected;
|
2016-02-09 14:30:00 +00:00
|
|
|
if (priv->inspected)
|
|
|
|
g_object_add_weak_pointer (G_OBJECT (priv->inspected),
|
|
|
|
(gpointer *) &priv->inspected);
|
2014-12-21 00:16:46 +00:00
|
|
|
|
2016-04-19 19:27:08 +00:00
|
|
|
if (gtk_widget_get_mapped (GTK_WIDGET (magnifier)))
|
|
|
|
connect_draw_handler (magnifier);
|
2014-12-21 00:16:46 +00:00
|
|
|
connect_resize_handler (magnifier);
|
|
|
|
|
2013-12-11 14:42:10 +00:00
|
|
|
g_object_notify (G_OBJECT (magnifier), "inspected");
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
_gtk_magnifier_set_coords (GtkMagnifier *magnifier,
|
|
|
|
gdouble x,
|
|
|
|
gdouble y)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
if (priv->x == x && priv->y == y)
|
|
|
|
return;
|
|
|
|
|
|
|
|
priv->x = x;
|
|
|
|
priv->y = y;
|
|
|
|
|
|
|
|
if (gtk_widget_is_visible (GTK_WIDGET (magnifier)))
|
|
|
|
gtk_widget_queue_draw (GTK_WIDGET (magnifier));
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
_gtk_magnifier_get_coords (GtkMagnifier *magnifier,
|
|
|
|
gdouble *x,
|
|
|
|
gdouble *y)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
if (x)
|
|
|
|
*x = priv->x;
|
|
|
|
|
|
|
|
if (y)
|
|
|
|
*y = priv->y;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
_gtk_magnifier_set_magnification (GtkMagnifier *magnifier,
|
|
|
|
gdouble magnification)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
if (priv->magnification == magnification)
|
|
|
|
return;
|
|
|
|
|
|
|
|
priv->magnification = magnification;
|
|
|
|
g_object_notify (G_OBJECT (magnifier), "magnification");
|
|
|
|
|
2014-12-21 00:16:46 +00:00
|
|
|
if (priv->resize)
|
|
|
|
gtk_widget_queue_resize (GTK_WIDGET (magnifier));
|
|
|
|
|
2013-12-11 14:42:10 +00:00
|
|
|
if (gtk_widget_is_visible (GTK_WIDGET (magnifier)))
|
|
|
|
gtk_widget_queue_draw (GTK_WIDGET (magnifier));
|
|
|
|
}
|
|
|
|
|
|
|
|
gdouble
|
|
|
|
_gtk_magnifier_get_magnification (GtkMagnifier *magnifier)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), 1);
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
return priv->magnification;
|
|
|
|
}
|
2014-12-21 00:16:46 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
_gtk_magnifier_set_resize (GtkMagnifier *magnifier,
|
|
|
|
gboolean resize)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_if_fail (GTK_IS_MAGNIFIER (magnifier));
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
if (priv->resize == resize)
|
|
|
|
return;
|
|
|
|
|
|
|
|
priv->resize = resize;
|
|
|
|
|
|
|
|
gtk_widget_queue_resize (GTK_WIDGET (magnifier));
|
|
|
|
if (resize)
|
|
|
|
connect_resize_handler (magnifier);
|
|
|
|
else
|
|
|
|
disconnect_resize_handler (magnifier);
|
|
|
|
}
|
|
|
|
|
|
|
|
gboolean
|
|
|
|
_gtk_magnifier_get_resize (GtkMagnifier *magnifier)
|
|
|
|
{
|
|
|
|
GtkMagnifierPrivate *priv;
|
|
|
|
|
|
|
|
g_return_val_if_fail (GTK_IS_MAGNIFIER (magnifier), FALSE);
|
|
|
|
|
|
|
|
priv = _gtk_magnifier_get_instance_private (magnifier);
|
|
|
|
|
|
|
|
return priv->resize;
|
|
|
|
}
|