gtk2/modules/inspector/property-cell-renderer.c

/*
 * Copyright (c) 2008-2009  Christian Hammond
 * Copyright (c) 2008-2009  David Trowbridge
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "property-cell-renderer.h"
#include "widget-tree.h"

struct _GtkInspectorPropertyCellRendererPrivate
{
  GObject *object;
  char *name;
  gboolean is_child_property;
};

enum
{
  PROP_0,
  PROP_OBJECT,
  PROP_NAME,
  PROP_IS_CHILD_PROPERTY
};

G_DEFINE_TYPE_WITH_PRIVATE (GtkInspectorPropertyCellRenderer, gtk_inspector_property_cell_renderer, GTK_TYPE_CELL_RENDERER_TEXT);

static void
gtk_inspector_property_cell_renderer_init(GtkInspectorPropertyCellRenderer *renderer)
{
  renderer->priv = gtk_inspector_property_cell_renderer_get_instance_private (renderer);
}

static void
get_property (GObject    *object,
              guint       param_id,
              GValue     *value,
              GParamSpec *pspec)
{
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (object);

  switch (param_id)
    {
    case PROP_OBJECT:
      g_value_set_object(value, r->priv->object);
      break;

    case PROP_NAME:
      g_value_set_string(value, r->priv->name);
      break;

    case PROP_IS_CHILD_PROPERTY:
      g_value_set_boolean (value, r->priv->is_child_property);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
      break;
    }
}

static void
set_property (GObject      *object,
              guint         param_id,
              const GValue *value,
              GParamSpec   *pspec)
{
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (object);

  switch (param_id)
    {
    case PROP_OBJECT:
      r->priv->object = g_value_get_object (value);
      break;

    case PROP_NAME:
      g_free (r->priv->name);
      r->priv->name = g_value_dup_string (value);
      break;

    case PROP_IS_CHILD_PROPERTY:
      r->priv->is_child_property = g_value_get_boolean (value);
      g_object_notify (object, "is-child-property");
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
      break;
    } 
}

static GParamSpec *
find_property (GtkCellRenderer *renderer)
{
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (renderer);

  if (r->priv->is_child_property)
    {
      GtkWidget *parent;

      parent = gtk_widget_get_parent (GTK_WIDGET (r->priv->object));

      return gtk_container_class_find_child_property (G_OBJECT_GET_CLASS (parent), r->priv->name);
    }

  return g_object_class_find_property (G_OBJECT_GET_CLASS (r->priv->object), r->priv->name);
}

static void
get_value (GtkCellRenderer *renderer,
           GValue          *gvalue)
{
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (renderer);

  if (r->priv->is_child_property)
    {
      GtkWidget *widget;
      GtkWidget *parent;

      widget = GTK_WIDGET (r->priv->object);
      parent = gtk_widget_get_parent (widget);

      gtk_container_child_get_property (GTK_CONTAINER (parent), widget, r->priv->name, gvalue);
    }
  else
    g_object_get_property (r->priv->object, r->priv->name, gvalue);
}

static void
set_value (GtkCellRenderer *renderer,
           GValue          *gvalue)
{
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (renderer);

  if (r->priv->is_child_property)
    {
      GtkWidget *widget;
      GtkWidget *parent;

      widget = GTK_WIDGET (r->priv->object);
      parent = gtk_widget_get_parent (widget);

      gtk_container_child_set_property (GTK_CONTAINER (parent), widget, r->priv->name, gvalue);
    }
  else
    g_object_set_property (r->priv->object, r->priv->name, gvalue);
}

static void
stop_editing (GtkCellEditable *editable,
              GtkCellRenderer *renderer)
{
  GValue gvalue = {0};
  GParamSpec *prop;

  prop = find_property (renderer);
  g_value_init(&gvalue, prop->value_type);

  if (GTK_IS_ENTRY(editable))
    {
      gboolean canceled;

      g_object_get (editable, "editing-canceled", &canceled, NULL);
      gtk_cell_renderer_stop_editing (renderer, canceled);

      if (canceled)
        return;

      if (GTK_IS_SPIN_BUTTON(editable))
        {
          gdouble value = g_ascii_strtod (gtk_entry_get_text (GTK_ENTRY (editable)), NULL);

          if (G_IS_PARAM_SPEC_INT (prop))
            g_value_set_int (&gvalue, (gint)value);
          else if G_IS_PARAM_SPEC_UINT (prop)
            g_value_set_uint (&gvalue, (guint)value);
          else if G_IS_PARAM_SPEC_INT64 (prop)
            g_value_set_int64 (&gvalue, (gint64)value);
          else if G_IS_PARAM_SPEC_UINT64 (prop)
            g_value_set_uint64 (&gvalue, (guint64)value);
          else if G_IS_PARAM_SPEC_LONG (prop)
            g_value_set_long (&gvalue, (glong)value);
          else if G_IS_PARAM_SPEC_ULONG (prop)
            g_value_set_ulong (&gvalue, (gulong)value);
          else if G_IS_PARAM_SPEC_DOUBLE (prop)
            g_value_set_double (&gvalue, (gdouble)value);
          else
            return;
        }
      else
        {
          g_value_set_string (&gvalue, gtk_entry_get_text (GTK_ENTRY (editable)));
        }
    }
  else if (GTK_IS_COMBO_BOX (editable))
    {
      /* We have no way of getting the canceled state for a GtkComboBox */
      gtk_cell_renderer_stop_editing (renderer, FALSE);

      if (G_IS_PARAM_SPEC_BOOLEAN (prop))
        {
          g_value_set_boolean (&gvalue, gtk_combo_box_get_active (GTK_COMBO_BOX (editable)) == 1);
        }
      else if (G_IS_PARAM_SPEC_ENUM (prop))
        {
          gchar *enum_name = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (editable));
          GEnumClass *enum_class;
          GEnumValue *enum_value;

          if (enum_name == NULL)
            return;

          enum_class = G_PARAM_SPEC_ENUM (prop)->enum_class;
          enum_value = g_enum_get_value_by_name (enum_class, enum_name);
          g_value_set_enum (&gvalue, enum_value->value);

          g_free (enum_name);
        }
    }

  set_value (renderer, &gvalue);
  g_value_unset (&gvalue);
}

static GtkCellEditable *
start_editing (GtkCellRenderer      *renderer,
               GdkEvent             *event,
               GtkWidget            *widget,
               const gchar          *path,
               const GdkRectangle   *background_area,
               const GdkRectangle   *cell_area,
               GtkCellRendererState  flags)
{
  PangoFontDescription *font_desc;
  GtkCellEditable *editable = NULL;
  GValue gvalue = {0};
  GParamSpec *prop;
  GtkInspectorPropertyCellRenderer *r = GTK_INSPECTOR_PROPERTY_CELL_RENDERER (renderer);

  prop = find_property (renderer);

  g_value_init (&gvalue, prop->value_type);

  get_value (renderer, &gvalue);

  if (G_VALUE_HOLDS_OBJECT (&gvalue))
    {
      GtkInspectorWidgetTree *widget_tree = g_object_get_data (G_OBJECT (renderer), "gtk-inspector-widget-tree");
      GObject *prop_object = g_value_get_object (&gvalue);
      GtkTreeIter iter;

      if (prop_object)
        {
          /* First check if the value is already in the tree (happens with 'parent' for instance) */
          if (gtk_inspector_widget_tree_find_object (widget_tree, prop_object, &iter))
            {
              gtk_inspector_widget_tree_select_object (widget_tree, prop_object);
            }
          else if (gtk_inspector_widget_tree_find_object (widget_tree, r->priv->object, &iter))
            {
              gtk_inspector_widget_tree_append_object (widget_tree, prop_object, &iter, prop->name);
              gtk_inspector_widget_tree_select_object (widget_tree, prop_object);
            }
          else
            {
              g_warning ("GtkInspector: couldn't find the widget in the tree");
            }
        }
      g_value_unset (&gvalue);
      return NULL;
    }
  else
    {
      if (!(prop->flags & G_PARAM_WRITABLE))
        return NULL;

      if (G_VALUE_HOLDS_ENUM (&gvalue) || G_VALUE_HOLDS_BOOLEAN (&gvalue))
        {
          GtkWidget *combobox;
          GList *renderers;

          combobox = gtk_combo_box_text_new ();
          gtk_widget_show (combobox);
          g_object_set (G_OBJECT (combobox), "has-frame", FALSE, NULL);

          if (G_VALUE_HOLDS_BOOLEAN (&gvalue))
            {
              gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combobox), "FALSE");
              gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combobox), "TRUE");

              gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), g_value_get_boolean (&gvalue) ? 1 : 0);
            }
          else if (G_VALUE_HOLDS_ENUM(&gvalue))
            {
              gint value = g_value_get_enum (&gvalue);
              GEnumClass *enum_class = G_PARAM_SPEC_ENUM (prop)->enum_class;
              guint i;

              for (i = 0; i < enum_class->n_values; i++)
                {
                  GEnumValue *enum_value = &enum_class->values[i];

                  gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combobox),
                                                  enum_value->value_name);

                  if (enum_value->value == value)
                    gtk_combo_box_set_active(GTK_COMBO_BOX(combobox), i);
                }
            }

          renderers = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (combobox));
          g_object_set (G_OBJECT (renderers->data), "scale", 0.8, NULL);
          g_list_free (renderers);

          editable = GTK_CELL_EDITABLE (combobox);
        }
      else if (G_VALUE_HOLDS_STRING (&gvalue))
        {
          GtkWidget *entry;

          entry = gtk_entry_new ();
          gtk_widget_show (entry);
          gtk_entry_set_text (GTK_ENTRY (entry), g_value_get_string (&gvalue));

          editable = GTK_CELL_EDITABLE (entry);
        }
      else if (G_VALUE_HOLDS_INT (&gvalue)    ||
               G_VALUE_HOLDS_UINT (&gvalue)   ||
               G_VALUE_HOLDS_INT64 (&gvalue)  ||
               G_VALUE_HOLDS_UINT64 (&gvalue) ||
               G_VALUE_HOLDS_LONG (&gvalue)   ||
               G_VALUE_HOLDS_ULONG (&gvalue)  ||
               G_VALUE_HOLDS_DOUBLE (&gvalue))
        {
          gdouble min, max, value;
          GtkWidget *spinbutton;
          guint digits = 0;

          if (G_VALUE_HOLDS_INT (&gvalue))
            {
              GParamSpecInt *paramspec = G_PARAM_SPEC_INT (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_int (&gvalue);
            }
          else if (G_VALUE_HOLDS_UINT (&gvalue))
            {
              GParamSpecUInt *paramspec = G_PARAM_SPEC_UINT (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_uint (&gvalue);
            }
          else if (G_VALUE_HOLDS_INT64 (&gvalue))
            {
              GParamSpecInt64 *paramspec = G_PARAM_SPEC_INT64 (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_int64 (&gvalue);
            }
          else if (G_VALUE_HOLDS_UINT64 (&gvalue))
            {
              GParamSpecUInt64 *paramspec = G_PARAM_SPEC_UINT64 (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_uint64 (&gvalue);
            }
          else if (G_VALUE_HOLDS_LONG (&gvalue))
            {
              GParamSpecLong *paramspec = G_PARAM_SPEC_LONG (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_long (&gvalue);
            }
          else if (G_VALUE_HOLDS_ULONG (&gvalue))
            {
              GParamSpecULong *paramspec = G_PARAM_SPEC_ULONG (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_ulong (&gvalue);
            }
          else if (G_VALUE_HOLDS_DOUBLE (&gvalue))
            {
              GParamSpecDouble *paramspec = G_PARAM_SPEC_DOUBLE (prop);
              min = paramspec->minimum;
              max = paramspec->maximum;
              value = g_value_get_double (&gvalue);
              digits = 2;
            }
          else
            {
              /* Shouldn't really be able to happen. */
              return NULL;
            }

          spinbutton = gtk_spin_button_new_with_range (min, max, 1);
          gtk_widget_show (spinbutton);
          gtk_spin_button_set_value (GTK_SPIN_BUTTON (spinbutton), value);
          gtk_spin_button_set_digits (GTK_SPIN_BUTTON (spinbutton), digits);

          editable = GTK_CELL_EDITABLE(spinbutton);
        }
    }

  g_value_unset (&gvalue);

  if (!editable)
    return NULL;

  font_desc = pango_font_description_new ();
  pango_font_description_set_size (font_desc, 8 * PANGO_SCALE);
  gtk_widget_override_font (GTK_WIDGET (editable), font_desc);
  pango_font_description_free (font_desc);

  g_signal_connect (editable, "editing-done", G_CALLBACK (stop_editing), renderer);

  return editable;
}

static void
gtk_inspector_property_cell_renderer_class_init (GtkInspectorPropertyCellRendererClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);

  object_class->get_property = get_property;
  object_class->set_property = set_property;

  cell_class->start_editing = start_editing;

  g_object_class_install_property (object_class, PROP_OBJECT,
      g_param_spec_object ("object", "Object", "The object owning the property",
                           G_TYPE_OBJECT, G_PARAM_READWRITE));

  g_object_class_install_property (object_class, PROP_NAME,
      g_param_spec_string ("name", "Name", "The property name",
                           NULL, G_PARAM_READWRITE));

  g_object_class_install_property (object_class, PROP_IS_CHILD_PROPERTY,
      g_param_spec_boolean ("is-child-property", "Child property", "Child property",
                            FALSE, G_PARAM_READWRITE));
}

GtkCellRenderer *
gtk_inspector_property_cell_renderer_new (void)
{
  return g_object_new (GTK_TYPE_INSPECTOR_PROPERTY_CELL_RENDERER, NULL);
}


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