1 | /* GAIL - The GNOME Accessibility Implementation Library |
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2 | * Copyright 2001, 2002, 2003 Sun Microsystems Inc. |
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3 | * |
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4 | * This library is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Lesser General Public |
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6 | * License as published by the Free Software Foundation; either |
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7 | * version 2 of the License, or (at your option) any later version. |
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8 | * |
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9 | * This library is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | * Lesser General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU Lesser General Public |
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15 | * License along with this library; if not, write to the |
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16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 | * Boston, MA 02111-1307, USA. |
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18 | */ |
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19 | |
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20 | #include <string.h> |
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21 | #include <gtk/gtk.h> |
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22 | #include "gailwidget.h" |
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23 | #include "gailnotebookpage.h" |
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24 | #include "gailcanvaswidget.h" |
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25 | |
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26 | static void gail_widget_class_init (GailWidgetClass *klass); |
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27 | |
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28 | static void gail_widget_connect_widget_destroyed (GtkAccessible *accessible); |
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29 | static void gail_widget_destroyed (GtkWidget *widget, |
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30 | GtkAccessible *accessible); |
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31 | |
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32 | static G_CONST_RETURN gchar* gail_widget_get_description (AtkObject *accessible); |
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33 | static AtkObject* gail_widget_get_parent (AtkObject *accessible); |
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34 | static AtkStateSet* gail_widget_ref_state_set (AtkObject *accessible); |
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35 | static AtkRelationSet* gail_widget_ref_relation_set (AtkObject *accessible); |
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36 | static gint gail_widget_get_index_in_parent (AtkObject *accessible); |
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37 | |
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38 | static void atk_component_interface_init (AtkComponentIface *iface); |
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39 | |
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40 | static guint gail_widget_add_focus_handler |
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41 | (AtkComponent *component, |
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42 | AtkFocusHandler handler); |
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43 | |
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44 | static void gail_widget_get_extents (AtkComponent *component, |
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45 | gint *x, |
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46 | gint *y, |
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47 | gint *width, |
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48 | gint *height, |
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49 | AtkCoordType coord_type); |
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50 | |
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51 | static void gail_widget_get_size (AtkComponent *component, |
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52 | gint *width, |
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53 | gint *height); |
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54 | |
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55 | static AtkLayer gail_widget_get_layer (AtkComponent *component); |
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56 | |
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57 | static gboolean gail_widget_grab_focus (AtkComponent *component); |
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58 | |
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59 | |
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60 | static void gail_widget_remove_focus_handler |
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61 | (AtkComponent *component, |
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62 | guint handler_id); |
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63 | |
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64 | static gboolean gail_widget_set_extents (AtkComponent *component, |
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65 | gint x, |
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66 | gint y, |
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67 | gint width, |
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68 | gint height, |
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69 | AtkCoordType coord_type); |
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70 | |
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71 | static gboolean gail_widget_set_position (AtkComponent *component, |
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72 | gint x, |
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73 | gint y, |
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74 | AtkCoordType coord_type); |
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75 | |
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76 | static gboolean gail_widget_set_size (AtkComponent *component, |
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77 | gint width, |
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78 | gint height); |
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79 | |
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80 | #if 0 |
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81 | /* |
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82 | * We will get the parent from the widget structure rather than |
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83 | * use this function |
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84 | */ |
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85 | static GtkWidget* _gail_widget_get_parent (GtkWidget *widget); |
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86 | #endif |
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87 | |
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88 | static gint gail_widget_map_gtk (GtkWidget *widget); |
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89 | static void gail_widget_real_notify_gtk (GObject *obj, |
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90 | GParamSpec *pspec); |
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91 | static void gail_widget_notify_gtk (GObject *obj, |
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92 | GParamSpec *pspec); |
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93 | static gboolean gail_widget_focus_gtk (GtkWidget *widget, |
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94 | GdkEventFocus *event); |
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95 | static gboolean gail_widget_real_focus_gtk (GtkWidget *widget, |
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96 | GdkEventFocus *event); |
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97 | static void gail_widget_size_allocate_gtk (GtkWidget *widget, |
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98 | GtkAllocation *allocation); |
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99 | |
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100 | static void gail_widget_focus_event (AtkObject *obj, |
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101 | gboolean focus_in); |
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102 | |
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103 | static void gail_widget_real_initialize (AtkObject *obj, |
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104 | gpointer data); |
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105 | static GtkWidget* gail_widget_find_viewport (GtkWidget *widget); |
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106 | static gboolean gail_widget_on_screen (GtkWidget *widget); |
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107 | |
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108 | static gpointer parent_class = NULL; |
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109 | |
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110 | GType |
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111 | gail_widget_get_type (void) |
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112 | { |
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113 | static GType type = 0; |
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114 | |
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115 | if (!type) |
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116 | { |
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117 | static const GTypeInfo tinfo = |
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118 | { |
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119 | sizeof (GailWidgetClass), |
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120 | (GBaseInitFunc) NULL, /* base init */ |
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121 | (GBaseFinalizeFunc) NULL, /* base finalize */ |
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122 | (GClassInitFunc) gail_widget_class_init, /* class init */ |
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123 | (GClassFinalizeFunc) NULL, /* class finalize */ |
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124 | NULL, /* class data */ |
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125 | sizeof (GailWidget), /* instance size */ |
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126 | 0, /* nb preallocs */ |
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127 | (GInstanceInitFunc) NULL, /* instance init */ |
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128 | NULL /* value table */ |
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129 | }; |
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130 | |
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131 | static const GInterfaceInfo atk_component_info = |
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132 | { |
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133 | (GInterfaceInitFunc) atk_component_interface_init, |
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134 | (GInterfaceFinalizeFunc) NULL, |
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135 | NULL |
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136 | }; |
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137 | |
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138 | type = g_type_register_static (GTK_TYPE_ACCESSIBLE, |
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139 | "GailWidget", &tinfo, 0); |
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140 | g_type_add_interface_static (type, ATK_TYPE_COMPONENT, |
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141 | &atk_component_info); |
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142 | } |
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143 | |
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144 | return type; |
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145 | } |
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146 | |
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147 | static void |
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148 | gail_widget_class_init (GailWidgetClass *klass) |
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149 | { |
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150 | AtkObjectClass *class = ATK_OBJECT_CLASS (klass); |
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151 | GtkAccessibleClass *accessible_class = GTK_ACCESSIBLE_CLASS (klass); |
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152 | |
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153 | parent_class = g_type_class_peek_parent (klass); |
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154 | |
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155 | klass->notify_gtk = gail_widget_real_notify_gtk; |
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156 | klass->focus_gtk = gail_widget_real_focus_gtk; |
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157 | |
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158 | accessible_class->connect_widget_destroyed = gail_widget_connect_widget_destroyed; |
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159 | |
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160 | class->get_description = gail_widget_get_description; |
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161 | class->get_parent = gail_widget_get_parent; |
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162 | class->ref_relation_set = gail_widget_ref_relation_set; |
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163 | class->ref_state_set = gail_widget_ref_state_set; |
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164 | class->get_index_in_parent = gail_widget_get_index_in_parent; |
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165 | class->initialize = gail_widget_real_initialize; |
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166 | } |
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167 | |
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168 | /** |
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169 | * This function specifies the GtkWidget for which the GailWidget was created |
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170 | * and specifies a handler to be called when the GtkWidget is destroyed. |
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171 | **/ |
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172 | static void |
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173 | gail_widget_real_initialize (AtkObject *obj, |
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174 | gpointer data) |
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175 | { |
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176 | GtkAccessible *accessible; |
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177 | GtkWidget *widget; |
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178 | |
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179 | g_return_if_fail (GTK_IS_WIDGET (data)); |
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180 | |
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181 | widget = GTK_WIDGET (data); |
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182 | |
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183 | accessible = GTK_ACCESSIBLE (obj); |
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184 | accessible->widget = widget; |
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185 | gtk_accessible_connect_widget_destroyed (accessible); |
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186 | g_signal_connect_after (widget, |
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187 | "focus-in-event", |
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188 | G_CALLBACK (gail_widget_focus_gtk), |
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189 | NULL); |
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190 | g_signal_connect_after (widget, |
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191 | "focus-out-event", |
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192 | G_CALLBACK (gail_widget_focus_gtk), |
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193 | NULL); |
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194 | g_signal_connect (widget, |
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195 | "notify", |
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196 | G_CALLBACK (gail_widget_notify_gtk), |
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197 | NULL); |
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198 | g_signal_connect (widget, |
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199 | "size_allocate", |
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200 | G_CALLBACK (gail_widget_size_allocate_gtk), |
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201 | NULL); |
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202 | atk_component_add_focus_handler (ATK_COMPONENT (accessible), |
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203 | gail_widget_focus_event); |
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204 | /* |
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205 | * Add signal handlers for GTK signals required to support property changes |
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206 | */ |
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207 | g_signal_connect (widget, |
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208 | "map", |
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209 | G_CALLBACK (gail_widget_map_gtk), |
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210 | NULL); |
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211 | g_signal_connect (widget, |
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212 | "unmap", |
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213 | G_CALLBACK (gail_widget_map_gtk), |
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214 | NULL); |
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215 | g_object_set_data (G_OBJECT (obj), "atk-component-layer", |
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216 | GINT_TO_POINTER (ATK_LAYER_WIDGET)); |
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217 | |
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218 | obj->role = ATK_ROLE_UNKNOWN; |
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219 | } |
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220 | |
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221 | AtkObject* |
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222 | gail_widget_new (GtkWidget *widget) |
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223 | { |
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224 | GObject *object; |
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225 | AtkObject *accessible; |
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226 | |
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227 | g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); |
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228 | |
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229 | object = g_object_new (GAIL_TYPE_WIDGET, NULL); |
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230 | |
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231 | accessible = ATK_OBJECT (object); |
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232 | atk_object_initialize (accessible, widget); |
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233 | |
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234 | return accessible; |
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235 | } |
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236 | |
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237 | /* |
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238 | * This function specifies the function to be called when the widget |
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239 | * is destroyed |
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240 | */ |
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241 | static void |
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242 | gail_widget_connect_widget_destroyed (GtkAccessible *accessible) |
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243 | { |
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244 | if (accessible->widget) |
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245 | { |
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246 | g_signal_connect_after (accessible->widget, |
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247 | "destroy", |
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248 | G_CALLBACK (gail_widget_destroyed), |
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249 | accessible); |
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250 | } |
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251 | } |
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252 | |
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253 | /* |
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254 | * This function is called when the widget is destroyed. |
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255 | * It sets the widget field in the GtkAccessible structure to NULL |
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256 | * and emits a state-change signal for the state ATK_STATE_DEFUNCT |
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257 | */ |
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258 | static void |
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259 | gail_widget_destroyed (GtkWidget *widget, |
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260 | GtkAccessible *accessible) |
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261 | { |
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262 | accessible->widget = NULL; |
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263 | atk_object_notify_state_change (ATK_OBJECT (accessible), ATK_STATE_DEFUNCT, |
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264 | TRUE); |
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265 | } |
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266 | |
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267 | static G_CONST_RETURN gchar* |
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268 | gail_widget_get_description (AtkObject *accessible) |
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269 | { |
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270 | if (accessible->description) |
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271 | return accessible->description; |
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272 | else |
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273 | { |
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274 | /* Get the tooltip from the widget */ |
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275 | GtkAccessible *obj = GTK_ACCESSIBLE (accessible); |
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276 | GtkTooltipsData *data; |
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277 | |
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278 | g_return_val_if_fail (obj, NULL); |
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279 | |
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280 | if (obj->widget == NULL) |
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281 | /* |
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282 | * Object is defunct |
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283 | */ |
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284 | return NULL; |
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285 | |
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286 | g_return_val_if_fail (GTK_WIDGET (obj->widget), NULL); |
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287 | |
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288 | data = gtk_tooltips_data_get (obj->widget); |
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289 | if (data == NULL) |
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290 | return NULL; |
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291 | |
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292 | return data->tip_text; |
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293 | } |
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294 | } |
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295 | |
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296 | static AtkObject* |
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297 | gail_widget_get_parent (AtkObject *accessible) |
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298 | { |
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299 | AtkObject *parent; |
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300 | |
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301 | parent = accessible->accessible_parent; |
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302 | |
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303 | if (parent != NULL) |
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304 | g_return_val_if_fail (ATK_IS_OBJECT (parent), NULL); |
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305 | else |
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306 | { |
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307 | GtkWidget *widget, *parent_widget; |
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308 | |
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309 | widget = GTK_ACCESSIBLE (accessible)->widget; |
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310 | if (widget == NULL) |
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311 | /* |
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312 | * State is defunct |
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313 | */ |
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314 | return NULL; |
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315 | g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); |
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316 | |
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317 | parent_widget = widget->parent; |
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318 | if (parent_widget == NULL) |
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319 | return NULL; |
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320 | |
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321 | /* |
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322 | * For a widget whose parent is a GtkNoteBook, we return the |
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323 | * accessible object corresponding the GtkNotebookPage containing |
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324 | * the widget as the accessible parent. |
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325 | */ |
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326 | if (GTK_IS_NOTEBOOK (parent_widget)) |
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327 | { |
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328 | gint page_num; |
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329 | GtkWidget *child; |
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330 | GtkNotebook *notebook; |
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331 | |
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332 | page_num = 0; |
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333 | notebook = GTK_NOTEBOOK (parent_widget); |
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334 | while (TRUE) |
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335 | { |
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336 | child = gtk_notebook_get_nth_page (notebook, page_num); |
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337 | if (!child) |
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338 | break; |
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339 | if (child == widget) |
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340 | { |
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341 | parent = gtk_widget_get_accessible (parent_widget); |
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342 | parent = atk_object_ref_accessible_child (parent, page_num); |
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343 | g_object_unref (parent); |
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344 | return parent; |
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345 | } |
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346 | page_num++; |
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347 | } |
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348 | } |
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349 | |
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350 | parent = gtk_widget_get_accessible (parent_widget); |
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351 | } |
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352 | return parent; |
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353 | } |
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354 | |
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355 | static GtkWidget* |
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356 | find_label (GtkWidget *widget) |
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357 | { |
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358 | GList *labels; |
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359 | GtkWidget *label; |
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360 | GtkWidget *temp_widget; |
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361 | |
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362 | labels = gtk_widget_list_mnemonic_labels (widget); |
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363 | label = NULL; |
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364 | if (labels) |
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365 | { |
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366 | if (labels->data) |
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367 | { |
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368 | if (labels->next) |
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369 | { |
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370 | g_warning ("Widget (%s) has more than one label", G_OBJECT_TYPE_NAME (widget)); |
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371 | |
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372 | } |
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373 | else |
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374 | { |
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375 | label = labels->data; |
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376 | } |
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377 | } |
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378 | g_list_free (labels); |
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379 | } |
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380 | |
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381 | /* |
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382 | * Ignore a label within a button; bug #136602 |
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383 | */ |
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384 | if (label && GTK_IS_BUTTON (widget)) |
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385 | { |
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386 | temp_widget = label; |
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387 | while (temp_widget) |
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388 | { |
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389 | if (temp_widget == widget) |
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390 | { |
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391 | label = NULL; |
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392 | break; |
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393 | } |
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394 | temp_widget = gtk_widget_get_parent (temp_widget); |
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395 | } |
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396 | } |
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397 | return label; |
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398 | } |
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399 | |
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400 | static AtkRelationSet* |
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401 | gail_widget_ref_relation_set (AtkObject *obj) |
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402 | { |
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403 | GtkWidget *widget; |
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404 | AtkRelationSet *relation_set; |
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405 | GtkWidget *label; |
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406 | AtkObject *array[1]; |
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407 | AtkRelation* relation; |
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408 | |
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409 | g_return_val_if_fail (GAIL_IS_WIDGET (obj), NULL); |
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410 | |
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411 | widget = GTK_ACCESSIBLE (obj)->widget; |
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412 | if (widget == NULL) |
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413 | /* |
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414 | * State is defunct |
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415 | */ |
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416 | return NULL; |
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417 | |
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418 | relation_set = ATK_OBJECT_CLASS (parent_class)->ref_relation_set (obj); |
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419 | |
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420 | if (GTK_IS_BOX (widget) && !GTK_IS_COMBO (widget)) |
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421 | /* |
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422 | * Do not report labelled-by for a GtkBox which could be a |
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423 | * GnomeFileEntry. |
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424 | */ |
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425 | return relation_set; |
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426 | |
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427 | if (!atk_relation_set_contains (relation_set, ATK_RELATION_LABELLED_BY)) |
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428 | { |
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429 | label = find_label (widget); |
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430 | if (label == NULL) |
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431 | { |
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432 | if (GTK_IS_BUTTON (widget)) |
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433 | /* |
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434 | * Handle the case where GnomeIconEntry is the mnemonic widget. |
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435 | * The GtkButton which is a grandchild of the GnomeIconEntry |
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436 | * should really be the mnemonic widget. See bug #133967. |
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437 | */ |
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438 | { |
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439 | GtkWidget *temp_widget; |
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440 | |
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441 | temp_widget = gtk_widget_get_parent (widget); |
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442 | |
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443 | if (GTK_IS_ALIGNMENT (temp_widget)) |
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444 | { |
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445 | temp_widget = gtk_widget_get_parent (temp_widget); |
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446 | if (GTK_IS_BOX (temp_widget)) |
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447 | { |
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448 | label = find_label (temp_widget); |
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449 | |
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450 | if (!label) |
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451 | label = find_label (gtk_widget_get_parent (temp_widget)); |
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452 | } |
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453 | } |
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454 | } |
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455 | else if (GTK_IS_COMBO (widget)) |
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456 | /* |
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457 | * Handle the case when GnomeFileEntry is the mnemonic widget. |
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458 | * The GnomeEntry which is a grandchild of the GnomeFileEntry |
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459 | * should be the mnemonic widget. See bug #137584. |
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460 | */ |
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461 | { |
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462 | GtkWidget *temp_widget; |
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463 | |
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464 | temp_widget = gtk_widget_get_parent (widget); |
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465 | |
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466 | if (GTK_IS_HBOX (temp_widget)) |
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467 | { |
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468 | temp_widget = gtk_widget_get_parent (temp_widget); |
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469 | if (GTK_IS_BOX (temp_widget)) |
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470 | { |
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471 | label = find_label (temp_widget); |
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472 | } |
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473 | } |
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474 | } |
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475 | } |
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476 | |
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477 | if (label) |
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478 | { |
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479 | array [0] = gtk_widget_get_accessible (label); |
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480 | |
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481 | relation = atk_relation_new (array, 1, ATK_RELATION_LABELLED_BY); |
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482 | atk_relation_set_add (relation_set, relation); |
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483 | g_object_unref (relation); |
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484 | } |
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485 | } |
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486 | |
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487 | return relation_set; |
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488 | } |
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489 | |
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490 | static AtkStateSet* |
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491 | gail_widget_ref_state_set (AtkObject *accessible) |
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492 | { |
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493 | GtkWidget *widget = GTK_ACCESSIBLE (accessible)->widget; |
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494 | AtkStateSet *state_set; |
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495 | |
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496 | state_set = ATK_OBJECT_CLASS (parent_class)->ref_state_set (accessible); |
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497 | |
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498 | if (widget == NULL) |
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499 | { |
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500 | atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT); |
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501 | } |
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502 | else |
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503 | { |
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504 | if (GTK_WIDGET_IS_SENSITIVE (widget)) |
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505 | { |
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506 | atk_state_set_add_state (state_set, ATK_STATE_SENSITIVE); |
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507 | atk_state_set_add_state (state_set, ATK_STATE_ENABLED); |
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508 | } |
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509 | |
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510 | if (GTK_WIDGET_CAN_FOCUS (widget)) |
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511 | { |
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512 | atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE); |
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513 | } |
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514 | /* |
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515 | * We do not currently generate notifications when an ATK object |
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516 | * corresponding to a GtkWidget changes visibility by being scrolled |
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517 | * on or off the screen. The testcase for this is the main window |
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518 | * of the testgtk application in which a set of buttons in a GtkVBox |
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519 | * is in a scrooled window with a viewport. |
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520 | * |
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521 | * To generate the notifications we would need to do the following: |
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522 | * 1) Find the GtkViewPort among the antecendents of the objects |
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523 | * 2) Create an accesible for the GtkViewPort |
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524 | * 3) Connect to the value-changed signal on the viewport |
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525 | * 4) When the signal is received we need to traverse the children |
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526 | * of the viewport and check whether the children are visible or not |
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527 | * visible; we may want to restrict this to the widgets for which |
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528 | * accessible objects have been created. |
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529 | * 5) We probably need to store a variable on_screen in the |
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530 | * GailWidget data structure so we can determine whether the value has |
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531 | * changed. |
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532 | */ |
---|
533 | if (gail_widget_on_screen (widget)) |
---|
534 | { |
---|
535 | if (GTK_WIDGET_VISIBLE (widget)) |
---|
536 | { |
---|
537 | atk_state_set_add_state (state_set, ATK_STATE_VISIBLE); |
---|
538 | |
---|
539 | if (GTK_WIDGET_MAPPED (widget)) |
---|
540 | { |
---|
541 | atk_state_set_add_state (state_set, ATK_STATE_SHOWING); |
---|
542 | } |
---|
543 | } |
---|
544 | } |
---|
545 | |
---|
546 | if (GTK_WIDGET_HAS_FOCUS (widget)) |
---|
547 | { |
---|
548 | AtkObject *focus_obj; |
---|
549 | |
---|
550 | focus_obj = g_object_get_data (G_OBJECT (accessible), "gail-focus-object"); |
---|
551 | if (focus_obj == NULL) |
---|
552 | atk_state_set_add_state (state_set, ATK_STATE_FOCUSED); |
---|
553 | } |
---|
554 | } |
---|
555 | return state_set; |
---|
556 | } |
---|
557 | |
---|
558 | static gint |
---|
559 | gail_widget_get_index_in_parent (AtkObject *accessible) |
---|
560 | { |
---|
561 | GtkWidget *widget; |
---|
562 | GtkWidget *parent_widget; |
---|
563 | gint index; |
---|
564 | GList *children; |
---|
565 | |
---|
566 | widget = GTK_ACCESSIBLE (accessible)->widget; |
---|
567 | |
---|
568 | if (widget == NULL) |
---|
569 | /* |
---|
570 | * State is defunct |
---|
571 | */ |
---|
572 | return -1; |
---|
573 | |
---|
574 | if (accessible->accessible_parent) |
---|
575 | { |
---|
576 | AtkObject *parent; |
---|
577 | |
---|
578 | parent = accessible->accessible_parent; |
---|
579 | |
---|
580 | if (GAIL_IS_NOTEBOOK_PAGE (parent) || |
---|
581 | GAIL_IS_CANVAS_WIDGET (parent)) |
---|
582 | return 0; |
---|
583 | else |
---|
584 | { |
---|
585 | gint n_children, i; |
---|
586 | gboolean found = FALSE; |
---|
587 | |
---|
588 | n_children = atk_object_get_n_accessible_children (parent); |
---|
589 | for (i = 0; i < n_children; i++) |
---|
590 | { |
---|
591 | AtkObject *child; |
---|
592 | |
---|
593 | child = atk_object_ref_accessible_child (parent, i); |
---|
594 | if (child == accessible) |
---|
595 | found = TRUE; |
---|
596 | |
---|
597 | g_object_unref (child); |
---|
598 | if (found) |
---|
599 | return i; |
---|
600 | } |
---|
601 | } |
---|
602 | } |
---|
603 | |
---|
604 | g_return_val_if_fail (GTK_IS_WIDGET (widget), -1); |
---|
605 | parent_widget = widget->parent; |
---|
606 | if (parent_widget == NULL) |
---|
607 | return -1; |
---|
608 | g_return_val_if_fail (GTK_IS_CONTAINER (parent_widget), -1); |
---|
609 | |
---|
610 | children = gtk_container_get_children (GTK_CONTAINER (parent_widget)); |
---|
611 | |
---|
612 | index = g_list_index (children, widget); |
---|
613 | g_list_free (children); |
---|
614 | return index; |
---|
615 | } |
---|
616 | |
---|
617 | static void |
---|
618 | atk_component_interface_init (AtkComponentIface *iface) |
---|
619 | { |
---|
620 | g_return_if_fail (iface != NULL); |
---|
621 | |
---|
622 | /* |
---|
623 | * Use default implementation for contains and get_position |
---|
624 | */ |
---|
625 | iface->add_focus_handler = gail_widget_add_focus_handler; |
---|
626 | iface->get_extents = gail_widget_get_extents; |
---|
627 | iface->get_size = gail_widget_get_size; |
---|
628 | iface->get_layer = gail_widget_get_layer; |
---|
629 | iface->grab_focus = gail_widget_grab_focus; |
---|
630 | iface->remove_focus_handler = gail_widget_remove_focus_handler; |
---|
631 | iface->set_extents = gail_widget_set_extents; |
---|
632 | iface->set_position = gail_widget_set_position; |
---|
633 | iface->set_size = gail_widget_set_size; |
---|
634 | } |
---|
635 | |
---|
636 | static guint |
---|
637 | gail_widget_add_focus_handler (AtkComponent *component, |
---|
638 | AtkFocusHandler handler) |
---|
639 | { |
---|
640 | GSignalMatchType match_type; |
---|
641 | gulong ret; |
---|
642 | guint signal_id; |
---|
643 | |
---|
644 | match_type = G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_FUNC; |
---|
645 | signal_id = g_signal_lookup ("focus-event", ATK_TYPE_OBJECT); |
---|
646 | |
---|
647 | ret = g_signal_handler_find (component, match_type, signal_id, 0, NULL, |
---|
648 | (gpointer) handler, NULL); |
---|
649 | if (!ret) |
---|
650 | { |
---|
651 | return g_signal_connect_closure_by_id (component, |
---|
652 | signal_id, 0, |
---|
653 | g_cclosure_new ( |
---|
654 | G_CALLBACK (handler), NULL, |
---|
655 | (GClosureNotify) NULL), |
---|
656 | FALSE); |
---|
657 | } |
---|
658 | else |
---|
659 | { |
---|
660 | return 0; |
---|
661 | } |
---|
662 | } |
---|
663 | |
---|
664 | static void |
---|
665 | gail_widget_get_extents (AtkComponent *component, |
---|
666 | gint *x, |
---|
667 | gint *y, |
---|
668 | gint *width, |
---|
669 | gint *height, |
---|
670 | AtkCoordType coord_type) |
---|
671 | { |
---|
672 | GdkWindow *window; |
---|
673 | gint x_window, y_window; |
---|
674 | gint x_toplevel, y_toplevel; |
---|
675 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
676 | |
---|
677 | if (widget == NULL) |
---|
678 | /* |
---|
679 | * Object is defunct |
---|
680 | */ |
---|
681 | return; |
---|
682 | |
---|
683 | g_return_if_fail (GTK_IS_WIDGET (widget)); |
---|
684 | |
---|
685 | *width = widget->allocation.width; |
---|
686 | *height = widget->allocation.height; |
---|
687 | if (!gail_widget_on_screen (widget) || (!GTK_WIDGET_DRAWABLE (widget))) |
---|
688 | { |
---|
689 | *x = G_MININT; |
---|
690 | *y = G_MININT; |
---|
691 | return; |
---|
692 | } |
---|
693 | |
---|
694 | if (widget->parent) |
---|
695 | { |
---|
696 | *x = widget->allocation.x; |
---|
697 | *y = widget->allocation.y; |
---|
698 | window = gtk_widget_get_parent_window (widget); |
---|
699 | } |
---|
700 | else |
---|
701 | { |
---|
702 | *x = 0; |
---|
703 | *y = 0; |
---|
704 | window = widget->window; |
---|
705 | } |
---|
706 | gdk_window_get_origin (window, &x_window, &y_window); |
---|
707 | *x += x_window; |
---|
708 | *y += y_window; |
---|
709 | |
---|
710 | |
---|
711 | if (coord_type == ATK_XY_WINDOW) |
---|
712 | { |
---|
713 | window = gdk_window_get_toplevel (widget->window); |
---|
714 | gdk_window_get_origin (window, &x_toplevel, &y_toplevel); |
---|
715 | |
---|
716 | *x -= x_toplevel; |
---|
717 | *y -= y_toplevel; |
---|
718 | } |
---|
719 | } |
---|
720 | |
---|
721 | static void |
---|
722 | gail_widget_get_size (AtkComponent *component, |
---|
723 | gint *width, |
---|
724 | gint *height) |
---|
725 | { |
---|
726 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
727 | |
---|
728 | if (widget == NULL) |
---|
729 | /* |
---|
730 | * Object is defunct |
---|
731 | */ |
---|
732 | return; |
---|
733 | |
---|
734 | g_return_if_fail (GTK_IS_WIDGET (widget)); |
---|
735 | |
---|
736 | *width = widget->allocation.width; |
---|
737 | *height = widget->allocation.height; |
---|
738 | } |
---|
739 | |
---|
740 | static AtkLayer |
---|
741 | gail_widget_get_layer (AtkComponent *component) |
---|
742 | { |
---|
743 | gint layer; |
---|
744 | layer = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (component), "atk-component-layer")); |
---|
745 | |
---|
746 | return (AtkLayer) layer; |
---|
747 | } |
---|
748 | |
---|
749 | static gboolean |
---|
750 | gail_widget_grab_focus (AtkComponent *component) |
---|
751 | { |
---|
752 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
753 | GtkWidget *toplevel; |
---|
754 | |
---|
755 | g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); |
---|
756 | if (GTK_WIDGET_CAN_FOCUS (widget)) |
---|
757 | { |
---|
758 | gtk_widget_grab_focus (widget); |
---|
759 | toplevel = gtk_widget_get_toplevel (widget); |
---|
760 | if (GTK_WIDGET_TOPLEVEL (toplevel)) |
---|
761 | gtk_window_present (GTK_WINDOW (toplevel)); |
---|
762 | return TRUE; |
---|
763 | } |
---|
764 | else |
---|
765 | return FALSE; |
---|
766 | } |
---|
767 | |
---|
768 | static void |
---|
769 | gail_widget_remove_focus_handler (AtkComponent *component, |
---|
770 | guint handler_id) |
---|
771 | { |
---|
772 | g_signal_handler_disconnect (component, handler_id); |
---|
773 | } |
---|
774 | |
---|
775 | static gboolean |
---|
776 | gail_widget_set_extents (AtkComponent *component, |
---|
777 | gint x, |
---|
778 | gint y, |
---|
779 | gint width, |
---|
780 | gint height, |
---|
781 | AtkCoordType coord_type) |
---|
782 | { |
---|
783 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
784 | |
---|
785 | if (widget == NULL) |
---|
786 | /* |
---|
787 | * Object is defunct |
---|
788 | */ |
---|
789 | return FALSE; |
---|
790 | g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); |
---|
791 | |
---|
792 | if (GTK_WIDGET_TOPLEVEL (widget)) |
---|
793 | { |
---|
794 | if (coord_type == ATK_XY_WINDOW) |
---|
795 | { |
---|
796 | gint x_current, y_current; |
---|
797 | GdkWindow *window = widget->window; |
---|
798 | |
---|
799 | gdk_window_get_origin (window, &x_current, &y_current); |
---|
800 | x_current += x; |
---|
801 | y_current += y; |
---|
802 | if (x_current < 0 || y_current < 0) |
---|
803 | return FALSE; |
---|
804 | else |
---|
805 | { |
---|
806 | gtk_widget_set_uposition (widget, x_current, y_current); |
---|
807 | gtk_widget_set_usize (widget, width, height); |
---|
808 | return TRUE; |
---|
809 | } |
---|
810 | } |
---|
811 | else if (coord_type == ATK_XY_SCREEN) |
---|
812 | { |
---|
813 | gtk_widget_set_uposition (widget, x, y); |
---|
814 | gtk_widget_set_usize (widget, width, height); |
---|
815 | return TRUE; |
---|
816 | } |
---|
817 | } |
---|
818 | return FALSE; |
---|
819 | } |
---|
820 | |
---|
821 | static gboolean |
---|
822 | gail_widget_set_position (AtkComponent *component, |
---|
823 | gint x, |
---|
824 | gint y, |
---|
825 | AtkCoordType coord_type) |
---|
826 | { |
---|
827 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
828 | |
---|
829 | if (widget == NULL) |
---|
830 | /* |
---|
831 | * Object is defunct |
---|
832 | */ |
---|
833 | return FALSE; |
---|
834 | g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); |
---|
835 | |
---|
836 | if (GTK_WIDGET_TOPLEVEL (widget)) |
---|
837 | { |
---|
838 | if (coord_type == ATK_XY_WINDOW) |
---|
839 | { |
---|
840 | gint x_current, y_current; |
---|
841 | GdkWindow *window = widget->window; |
---|
842 | |
---|
843 | gdk_window_get_origin (window, &x_current, &y_current); |
---|
844 | x_current += x; |
---|
845 | y_current += y; |
---|
846 | if (x_current < 0 || y_current < 0) |
---|
847 | return FALSE; |
---|
848 | else |
---|
849 | { |
---|
850 | gtk_widget_set_uposition (widget, x_current, y_current); |
---|
851 | return TRUE; |
---|
852 | } |
---|
853 | } |
---|
854 | else if (coord_type == ATK_XY_SCREEN) |
---|
855 | { |
---|
856 | gtk_widget_set_uposition (widget, x, y); |
---|
857 | return TRUE; |
---|
858 | } |
---|
859 | } |
---|
860 | return FALSE; |
---|
861 | } |
---|
862 | |
---|
863 | static gboolean |
---|
864 | gail_widget_set_size (AtkComponent *component, |
---|
865 | gint width, |
---|
866 | gint height) |
---|
867 | { |
---|
868 | GtkWidget *widget = GTK_ACCESSIBLE (component)->widget; |
---|
869 | |
---|
870 | if (widget == NULL) |
---|
871 | /* |
---|
872 | * Object is defunct |
---|
873 | */ |
---|
874 | return FALSE; |
---|
875 | g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); |
---|
876 | |
---|
877 | if (GTK_WIDGET_TOPLEVEL (widget)) |
---|
878 | { |
---|
879 | gtk_widget_set_usize (widget, width, height); |
---|
880 | return TRUE; |
---|
881 | } |
---|
882 | else |
---|
883 | return FALSE; |
---|
884 | } |
---|
885 | |
---|
886 | #if 0 |
---|
887 | static GtkWidget* |
---|
888 | _gail_widget_get_parent (GtkWidget* widget) |
---|
889 | { |
---|
890 | GtkWidget *parent_widget; |
---|
891 | gpointer pointer; |
---|
892 | GValue value = { 0, }; |
---|
893 | |
---|
894 | g_return_val_if_fail (GTK_WIDGET (widget), NULL); |
---|
895 | |
---|
896 | g_value_init (&value, G_TYPE_OBJECT); |
---|
897 | g_object_get_property (G_OBJECT (widget), "parent", &value); |
---|
898 | pointer = g_value_get_object (&value); |
---|
899 | |
---|
900 | g_return_val_if_fail (GTK_IS_WIDGET (pointer), NULL); |
---|
901 | |
---|
902 | return GTK_WIDGET (pointer); |
---|
903 | } |
---|
904 | #endif |
---|
905 | |
---|
906 | /* |
---|
907 | * This function is a signal handler for notify_in_event and focus_out_event |
---|
908 | * signal which gets emitted on a GtkWidget. |
---|
909 | */ |
---|
910 | static gboolean |
---|
911 | gail_widget_focus_gtk (GtkWidget *widget, |
---|
912 | GdkEventFocus *event) |
---|
913 | { |
---|
914 | GailWidget *gail_widget; |
---|
915 | GailWidgetClass *klass; |
---|
916 | |
---|
917 | gail_widget = GAIL_WIDGET (gtk_widget_get_accessible (widget)); |
---|
918 | klass = GAIL_WIDGET_GET_CLASS (gail_widget); |
---|
919 | if (klass->focus_gtk) |
---|
920 | return klass->focus_gtk (widget, event); |
---|
921 | else |
---|
922 | return FALSE; |
---|
923 | } |
---|
924 | |
---|
925 | /* |
---|
926 | * This function is the signal handler defined for focus_in_event and |
---|
927 | * focus_out_event got GailWidget. |
---|
928 | * |
---|
929 | * It emits a focus-event signal on the GailWidget. |
---|
930 | */ |
---|
931 | static gboolean |
---|
932 | gail_widget_real_focus_gtk (GtkWidget *widget, |
---|
933 | GdkEventFocus *event) |
---|
934 | { |
---|
935 | AtkObject* accessible; |
---|
936 | gboolean return_val; |
---|
937 | return_val = FALSE; |
---|
938 | |
---|
939 | accessible = gtk_widget_get_accessible (widget); |
---|
940 | g_signal_emit_by_name (accessible, "focus_event", event->in, &return_val); |
---|
941 | return FALSE; |
---|
942 | } |
---|
943 | |
---|
944 | static void |
---|
945 | gail_widget_size_allocate_gtk (GtkWidget *widget, |
---|
946 | GtkAllocation *allocation) |
---|
947 | { |
---|
948 | AtkObject* accessible; |
---|
949 | AtkRectangle rect; |
---|
950 | |
---|
951 | accessible = gtk_widget_get_accessible (widget); |
---|
952 | if (ATK_IS_COMPONENT (accessible)) |
---|
953 | { |
---|
954 | rect.x = allocation->x; |
---|
955 | rect.y = allocation->y; |
---|
956 | rect.width = allocation->width; |
---|
957 | rect.height = allocation->height; |
---|
958 | g_signal_emit_by_name (accessible, "bounds_changed", &rect); |
---|
959 | } |
---|
960 | } |
---|
961 | |
---|
962 | /* |
---|
963 | * This function is the signal handler defined for map and unmap signals. |
---|
964 | */ |
---|
965 | static gint |
---|
966 | gail_widget_map_gtk (GtkWidget *widget) |
---|
967 | { |
---|
968 | AtkObject* accessible; |
---|
969 | |
---|
970 | accessible = gtk_widget_get_accessible (widget); |
---|
971 | atk_object_notify_state_change (accessible, ATK_STATE_SHOWING, |
---|
972 | GTK_WIDGET_MAPPED (widget)); |
---|
973 | return 1; |
---|
974 | } |
---|
975 | |
---|
976 | /* |
---|
977 | * This function is a signal handler for notify signal which gets emitted |
---|
978 | * when a property changes value on the GtkWidget associated with the object. |
---|
979 | * |
---|
980 | * It calls a function for the GailWidget type |
---|
981 | */ |
---|
982 | static void |
---|
983 | gail_widget_notify_gtk (GObject *obj, |
---|
984 | GParamSpec *pspec) |
---|
985 | { |
---|
986 | GailWidget *widget; |
---|
987 | GailWidgetClass *klass; |
---|
988 | |
---|
989 | widget = GAIL_WIDGET (gtk_widget_get_accessible (GTK_WIDGET (obj))); |
---|
990 | klass = GAIL_WIDGET_GET_CLASS (widget); |
---|
991 | if (klass->notify_gtk) |
---|
992 | klass->notify_gtk (obj, pspec); |
---|
993 | } |
---|
994 | |
---|
995 | /* |
---|
996 | * This function is a signal handler for notify signal which gets emitted |
---|
997 | * when a property changes value on the GtkWidget associated with a GailWidget. |
---|
998 | * |
---|
999 | * It constructs an AtkPropertyValues structure and emits a "property_changed" |
---|
1000 | * signal which causes the user specified AtkPropertyChangeHandler |
---|
1001 | * to be called. |
---|
1002 | */ |
---|
1003 | static void |
---|
1004 | gail_widget_real_notify_gtk (GObject *obj, |
---|
1005 | GParamSpec *pspec) |
---|
1006 | { |
---|
1007 | GtkWidget* widget = GTK_WIDGET (obj); |
---|
1008 | AtkObject* atk_obj = gtk_widget_get_accessible (widget); |
---|
1009 | AtkState state; |
---|
1010 | gboolean value; |
---|
1011 | |
---|
1012 | if (strcmp (pspec->name, "has-focus") == 0) |
---|
1013 | /* |
---|
1014 | * We use focus-in-event and focus-out-event signals to catch |
---|
1015 | * focus changes so we ignore this. |
---|
1016 | */ |
---|
1017 | return; |
---|
1018 | else if (strcmp (pspec->name, "visible") == 0) |
---|
1019 | { |
---|
1020 | state = ATK_STATE_VISIBLE; |
---|
1021 | value = GTK_WIDGET_VISIBLE (widget); |
---|
1022 | } |
---|
1023 | else if (strcmp (pspec->name, "sensitive") == 0) |
---|
1024 | { |
---|
1025 | state = ATK_STATE_SENSITIVE; |
---|
1026 | value = GTK_WIDGET_SENSITIVE (widget); |
---|
1027 | } |
---|
1028 | else |
---|
1029 | return; |
---|
1030 | |
---|
1031 | atk_object_notify_state_change (atk_obj, state, value); |
---|
1032 | } |
---|
1033 | |
---|
1034 | static void |
---|
1035 | gail_widget_focus_event (AtkObject *obj, |
---|
1036 | gboolean focus_in) |
---|
1037 | { |
---|
1038 | AtkObject *focus_obj; |
---|
1039 | |
---|
1040 | focus_obj = g_object_get_data (G_OBJECT (obj), "gail-focus-object"); |
---|
1041 | if (focus_obj == NULL) |
---|
1042 | focus_obj = obj; |
---|
1043 | atk_object_notify_state_change (focus_obj, ATK_STATE_FOCUSED, focus_in); |
---|
1044 | } |
---|
1045 | |
---|
1046 | static GtkWidget* |
---|
1047 | gail_widget_find_viewport (GtkWidget *widget) |
---|
1048 | { |
---|
1049 | /* |
---|
1050 | * Find an antecedent which is a GtkViewPort |
---|
1051 | */ |
---|
1052 | GtkWidget *parent; |
---|
1053 | |
---|
1054 | parent = widget->parent; |
---|
1055 | while (parent != NULL) |
---|
1056 | { |
---|
1057 | if (GTK_IS_VIEWPORT (parent)) |
---|
1058 | break; |
---|
1059 | parent = parent->parent; |
---|
1060 | } |
---|
1061 | return parent; |
---|
1062 | } |
---|
1063 | |
---|
1064 | /* |
---|
1065 | * This function checks whether the widget has an antecedent which is |
---|
1066 | * a GtkViewport and, if so, whether any part of the widget intersects |
---|
1067 | * the visible rectangle of the GtkViewport. |
---|
1068 | */ |
---|
1069 | static gboolean gail_widget_on_screen (GtkWidget *widget) |
---|
1070 | { |
---|
1071 | GtkWidget *viewport; |
---|
1072 | gboolean return_value; |
---|
1073 | |
---|
1074 | viewport = gail_widget_find_viewport (widget); |
---|
1075 | if (viewport) |
---|
1076 | { |
---|
1077 | GtkAdjustment *adjustment; |
---|
1078 | GdkRectangle visible_rect; |
---|
1079 | |
---|
1080 | adjustment = gtk_viewport_get_vadjustment (GTK_VIEWPORT (viewport)); |
---|
1081 | visible_rect.y = adjustment->value; |
---|
1082 | adjustment = gtk_viewport_get_hadjustment (GTK_VIEWPORT (viewport)); |
---|
1083 | visible_rect.x = adjustment->value; |
---|
1084 | visible_rect.width = viewport->allocation.width; |
---|
1085 | visible_rect.height = viewport->allocation.height; |
---|
1086 | |
---|
1087 | if (((widget->allocation.x + widget->allocation.width) < visible_rect.x) || |
---|
1088 | ((widget->allocation.y + widget->allocation.height) < visible_rect.y) || |
---|
1089 | (widget->allocation.x > (visible_rect.x + visible_rect.width)) || |
---|
1090 | (widget->allocation.y > (visible_rect.y + visible_rect.height))) |
---|
1091 | return_value = FALSE; |
---|
1092 | else |
---|
1093 | return_value = TRUE; |
---|
1094 | } |
---|
1095 | else |
---|
1096 | { |
---|
1097 | /* |
---|
1098 | * Check whether the widget has been placed of the screen. The |
---|
1099 | * widget may be MAPPED as when toolbar items do not fit on the toolbar. |
---|
1100 | */ |
---|
1101 | if (widget->allocation.x + widget->allocation.width <= 0 && |
---|
1102 | widget->allocation.y + widget->allocation.height <= 0) |
---|
1103 | return_value = FALSE; |
---|
1104 | else |
---|
1105 | return_value = TRUE; |
---|
1106 | } |
---|
1107 | |
---|
1108 | return return_value; |
---|
1109 | } |
---|