578 lines
20 KiB
C
578 lines
20 KiB
C
/* LIBPIKA - The PIKA Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* pikacellrenderertoggle.c
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* Copyright (C) 2003-2004 Sven Neumann <sven@gimp.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 3 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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* Library 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
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* <https://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 "libpikabase/pikabase.h"
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#include "pikawidgetstypes.h"
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#include "pikawidgetsmarshal.h"
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#include "pikacellrenderertoggle.h"
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/**
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* SECTION: pikacellrenderertoggle
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* @title: PikaCellRendererToggle
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* @short_description: A #GtkCellRendererToggle that displays icons instead
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* of a checkbox.
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*
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* A #GtkCellRendererToggle that displays icons instead of a checkbox.
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**/
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#define DEFAULT_ICON_SIZE 16
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enum
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{
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CLICKED,
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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PROP_ICON_NAME,
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PROP_ICON_SIZE,
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PROP_OVERRIDE_BACKGROUND
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};
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struct _PikaCellRendererTogglePrivate
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{
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gchar *icon_name;
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gint icon_size;
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gboolean override_background;
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GdkPixbuf *pixbuf;
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};
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#define GET_PRIVATE(obj) (((PikaCellRendererToggle *) (obj))->priv)
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static void pika_cell_renderer_toggle_finalize (GObject *object);
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static void pika_cell_renderer_toggle_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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static void pika_cell_renderer_toggle_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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static void pika_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *rectangle,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height);
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static void pika_cell_renderer_toggle_render (GtkCellRenderer *cell,
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cairo_t *cr,
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GtkWidget *widget,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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static gboolean pika_cell_renderer_toggle_activate (GtkCellRenderer *cell,
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GdkEvent *event,
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GtkWidget *widget,
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const gchar *path,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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static void pika_cell_renderer_toggle_create_pixbuf (PikaCellRendererToggle *toggle,
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GtkWidget *widget);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaCellRendererToggle, pika_cell_renderer_toggle,
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GTK_TYPE_CELL_RENDERER_TOGGLE)
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#define parent_class pika_cell_renderer_toggle_parent_class
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static guint toggle_cell_signals[LAST_SIGNAL] = { 0 };
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static void
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pika_cell_renderer_toggle_class_init (PikaCellRendererToggleClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
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toggle_cell_signals[CLICKED] =
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g_signal_new ("clicked",
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (PikaCellRendererToggleClass, clicked),
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NULL, NULL,
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_pika_widgets_marshal_VOID__STRING_FLAGS,
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G_TYPE_NONE, 2,
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G_TYPE_STRING,
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GDK_TYPE_MODIFIER_TYPE);
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object_class->finalize = pika_cell_renderer_toggle_finalize;
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object_class->get_property = pika_cell_renderer_toggle_get_property;
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object_class->set_property = pika_cell_renderer_toggle_set_property;
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cell_class->get_size = pika_cell_renderer_toggle_get_size;
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cell_class->render = pika_cell_renderer_toggle_render;
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cell_class->activate = pika_cell_renderer_toggle_activate;
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g_object_class_install_property (object_class, PROP_ICON_NAME,
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g_param_spec_string ("icon-name",
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"Icon Name",
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"The icon to display",
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NULL,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_ICON_SIZE,
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g_param_spec_int ("icon-size",
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"Icon Size",
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"The desired icon size to use in pixel (before applying scaling factor)",
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0, G_MAXINT,
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DEFAULT_ICON_SIZE,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_OVERRIDE_BACKGROUND,
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g_param_spec_boolean ("override-background",
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"Override Background",
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"Draw the background if the row is selected",
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FALSE,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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pika_cell_renderer_toggle_init (PikaCellRendererToggle *toggle)
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{
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toggle->priv = pika_cell_renderer_toggle_get_instance_private (toggle);
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}
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static void
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pika_cell_renderer_toggle_finalize (GObject *object)
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{
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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (object);
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g_clear_pointer (&priv->icon_name, g_free);
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g_clear_object (&priv->pixbuf);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_cell_renderer_toggle_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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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (object);
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switch (param_id)
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{
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case PROP_ICON_NAME:
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g_value_set_string (value, priv->icon_name);
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break;
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case PROP_ICON_SIZE:
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g_value_set_int (value, priv->icon_size);
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break;
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case PROP_OVERRIDE_BACKGROUND:
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g_value_set_boolean (value, priv->override_background);
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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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break;
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}
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}
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static void
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pika_cell_renderer_toggle_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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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (object);
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switch (param_id)
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{
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case PROP_ICON_NAME:
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if (priv->icon_name)
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g_free (priv->icon_name);
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priv->icon_name = g_value_dup_string (value);
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break;
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case PROP_ICON_SIZE:
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priv->icon_size = g_value_get_int (value);
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break;
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case PROP_OVERRIDE_BACKGROUND:
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priv->override_background = 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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break;
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}
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g_clear_object (&priv->pixbuf);
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}
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static void
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pika_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height)
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{
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PikaCellRendererToggle *toggle = PIKA_CELL_RENDERER_TOGGLE (cell);
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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (cell);
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GtkStyleContext *context = gtk_widget_get_style_context (widget);
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GtkBorder border;
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gint scale_factor;
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gint calc_width;
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gint calc_height;
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gint pixbuf_width;
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gint pixbuf_height;
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gfloat xalign;
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gfloat yalign;
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gint xpad;
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gint ypad;
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scale_factor = gtk_widget_get_scale_factor (widget);
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if (! priv->icon_name)
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{
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GTK_CELL_RENDERER_CLASS (parent_class)->get_size (cell,
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widget,
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cell_area,
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x_offset, y_offset,
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width, height);
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return;
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}
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gtk_style_context_save (context);
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gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
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gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
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if (! priv->pixbuf)
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pika_cell_renderer_toggle_create_pixbuf (toggle, widget);
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pixbuf_width = gdk_pixbuf_get_width (priv->pixbuf);
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pixbuf_height = gdk_pixbuf_get_height (priv->pixbuf);
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/* The pixbuf size may be bigger than the logical size. */
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calc_width = pixbuf_width / scale_factor + (gint) xpad * 2;
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calc_height = pixbuf_height / scale_factor + (gint) ypad * 2;
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
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gtk_style_context_get_border (context, 0, &border);
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calc_width += border.left + border.right;
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calc_height += border.top + border.bottom;
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if (width)
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*width = calc_width;
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if (height)
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*height = calc_height;
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if (cell_area)
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{
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if (x_offset)
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{
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*x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
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(1.0 - xalign) : xalign) *
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(cell_area->width - calc_width));
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*x_offset = MAX (*x_offset, 0);
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}
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if (y_offset)
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{
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*y_offset = yalign * (cell_area->height - calc_height);
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*y_offset = MAX (*y_offset, 0);
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}
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}
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gtk_style_context_restore (context);
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}
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static void
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pika_cell_renderer_toggle_render (GtkCellRenderer *cell,
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cairo_t *cr,
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GtkWidget *widget,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags)
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{
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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (cell);
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GtkStyleContext *context = gtk_widget_get_style_context (widget);
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GdkRectangle toggle_rect;
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GtkStateFlags state;
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gboolean active;
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gint scale_factor;
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gint xpad;
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gint ypad;
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scale_factor = gtk_widget_get_scale_factor (widget);
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if (! priv->icon_name)
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{
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GTK_CELL_RENDERER_CLASS (parent_class)->render (cell, cr, widget,
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background_area,
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cell_area,
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flags);
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return;
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}
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if ((flags & GTK_CELL_RENDERER_SELECTED) &&
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priv->override_background)
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{
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gboolean background_set;
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g_object_get (cell,
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"cell-background-set", &background_set,
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NULL);
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if (background_set)
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{
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GdkRGBA *color;
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g_object_get (cell,
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"cell-background-rgba", &color,
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NULL);
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gdk_cairo_rectangle (cr, background_area);
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gdk_cairo_set_source_rgba (cr, color);
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cairo_fill (cr);
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gdk_rgba_free (color);
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}
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}
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pika_cell_renderer_toggle_get_size (cell, widget, cell_area,
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&toggle_rect.x,
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&toggle_rect.y,
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&toggle_rect.width,
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&toggle_rect.height);
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gtk_style_context_save (context);
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
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gtk_style_context_add_class (context, "toggle-icon");
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gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
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toggle_rect.x += cell_area->x + xpad;
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toggle_rect.y += cell_area->y + ypad;
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toggle_rect.width -= xpad * 2;
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toggle_rect.height -= ypad * 2;
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if (toggle_rect.width <= 0 || toggle_rect.height <= 0)
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return;
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state = gtk_cell_renderer_get_state (cell, widget, flags);
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active =
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gtk_cell_renderer_toggle_get_active (GTK_CELL_RENDERER_TOGGLE (cell));
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if (active)
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{
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gtk_style_context_add_class (context, "visible");
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state |= GTK_STATE_FLAG_ACTIVE;
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}
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if (! gtk_cell_renderer_toggle_get_activatable (GTK_CELL_RENDERER_TOGGLE (cell)))
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state |= GTK_STATE_FLAG_INSENSITIVE;
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gtk_style_context_set_state (context, state);
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if (state & GTK_STATE_FLAG_PRELIGHT)
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gtk_render_frame (context, cr,
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toggle_rect.x, toggle_rect.y,
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toggle_rect.width, toggle_rect.height);
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if (active)
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{
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GtkBorder border;
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gboolean inconsistent;
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gtk_style_context_get_border (context, 0, &border);
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toggle_rect.x += border.left;
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toggle_rect.x *= scale_factor;
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toggle_rect.y += border.top;
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toggle_rect.y *= scale_factor;
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toggle_rect.width -= border.left + border.right;
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toggle_rect.height -= border.top + border.bottom;
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/* For high DPI displays, pixbuf size is bigger than logical size. */
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cairo_scale (cr, (gdouble) 1.0 / scale_factor, (gdouble) 1.0 / scale_factor);
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gdk_cairo_set_source_pixbuf (cr, priv->pixbuf,
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toggle_rect.x, toggle_rect.y);
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cairo_paint (cr);
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g_object_get (cell,
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"inconsistent", &inconsistent,
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NULL);
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if (inconsistent)
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{
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GdkRGBA color;
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gtk_style_context_get_color (context, state, &color);
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gdk_cairo_set_source_rgba (cr, &color);
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cairo_set_line_width (cr, scale_factor * 1.5);
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cairo_move_to (cr,
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toggle_rect.x + scale_factor * (toggle_rect.width - 1),
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toggle_rect.y + scale_factor);
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cairo_line_to (cr,
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toggle_rect.x + scale_factor,
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toggle_rect.y + scale_factor * (toggle_rect.height - 1));
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cairo_stroke (cr);
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}
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}
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gtk_style_context_restore (context);
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}
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static gboolean
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pika_cell_renderer_toggle_activate (GtkCellRenderer *cell,
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GdkEvent *event,
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GtkWidget *widget,
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const gchar *path,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags)
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{
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GtkCellRendererToggle *toggle = GTK_CELL_RENDERER_TOGGLE (cell);
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if (gtk_cell_renderer_toggle_get_activatable (toggle))
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{
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GdkModifierType state = 0;
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if (event && ((GdkEventAny *) event)->type == GDK_BUTTON_PRESS)
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state = ((GdkEventButton *) event)->state;
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pika_cell_renderer_toggle_clicked (PIKA_CELL_RENDERER_TOGGLE (cell),
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path, state);
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return TRUE;
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}
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return FALSE;
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}
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static void
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pika_cell_renderer_toggle_create_pixbuf (PikaCellRendererToggle *toggle,
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GtkWidget *widget)
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{
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PikaCellRendererTogglePrivate *priv = GET_PRIVATE (toggle);
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g_clear_object (&priv->pixbuf);
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if (priv->icon_name)
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{
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GdkPixbuf *pixbuf;
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GdkScreen *screen;
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GtkIconTheme *icon_theme;
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GtkIconInfo *icon_info;
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gchar *icon_name;
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gint scale_factor;
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scale_factor = gtk_widget_get_scale_factor (widget);
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screen = gtk_widget_get_screen (widget);
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icon_theme = gtk_icon_theme_get_for_screen (screen);
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/* Look for symbolic and fallback to color icon. */
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icon_name = g_strdup_printf ("%s-symbolic", priv->icon_name);
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icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme, icon_name,
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priv->icon_size, scale_factor,
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GTK_ICON_LOOKUP_GENERIC_FALLBACK);
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g_free (icon_name);
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if (! icon_info)
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{
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icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme, "image-missing",
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priv->icon_size, scale_factor,
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GTK_ICON_LOOKUP_GENERIC_FALLBACK |
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GTK_ICON_LOOKUP_USE_BUILTIN);
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}
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g_return_if_fail (icon_info != NULL);
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pixbuf = gtk_icon_info_load_symbolic_for_context (icon_info,
|
|
gtk_widget_get_style_context (widget),
|
|
NULL, NULL);
|
|
priv->pixbuf = pixbuf;
|
|
g_object_unref (icon_info);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* pika_cell_renderer_toggle_new:
|
|
* @icon_name: the icon name of the icon to use for the active state
|
|
*
|
|
* Creates a custom version of the #GtkCellRendererToggle. Instead of
|
|
* showing the standard toggle button, it shows a named icon if the
|
|
* cell is active and no icon otherwise. This cell renderer is for
|
|
* example used in the Layers treeview to indicate and control the
|
|
* layer's visibility by showing %PIKA_STOCK_VISIBLE.
|
|
*
|
|
* Returns: a new #PikaCellRendererToggle
|
|
*
|
|
* Since: 2.2
|
|
**/
|
|
GtkCellRenderer *
|
|
pika_cell_renderer_toggle_new (const gchar *icon_name)
|
|
{
|
|
return g_object_new (PIKA_TYPE_CELL_RENDERER_TOGGLE,
|
|
"icon-name", icon_name,
|
|
NULL);
|
|
}
|
|
|
|
/**
|
|
* pika_cell_renderer_toggle_clicked:
|
|
* @cell: a #PikaCellRendererToggle
|
|
* @path: the path to the clicked row
|
|
* @state: the modifier state
|
|
*
|
|
* Emits the "clicked" signal from a #PikaCellRendererToggle.
|
|
*
|
|
* Since: 2.2
|
|
**/
|
|
void
|
|
pika_cell_renderer_toggle_clicked (PikaCellRendererToggle *cell,
|
|
const gchar *path,
|
|
GdkModifierType state)
|
|
{
|
|
g_return_if_fail (PIKA_IS_CELL_RENDERER_TOGGLE (cell));
|
|
g_return_if_fail (path != NULL);
|
|
|
|
g_signal_emit (cell, toggle_cell_signals[CLICKED], 0, path, state);
|
|
}
|
