1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
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2 | * |
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3 | * Copyright (C) 2008 Red Hat, Inc. |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License |
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16 | * along with this program; if not, write to the Free Software |
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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18 | * USA. |
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19 | * |
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20 | * Written by: Ray Strode <rstrode@redhat.com> |
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21 | * |
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22 | * Parts taken from gtkscrolledwindow.c in the GTK+ toolkit. |
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23 | */ |
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24 | |
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25 | #include "config.h" |
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26 | |
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27 | #include <stdlib.h> |
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28 | #include <stdio.h> |
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29 | #include <unistd.h> |
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30 | #include <string.h> |
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31 | #include <errno.h> |
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32 | |
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33 | #include <glib.h> |
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34 | #include <glib/gi18n.h> |
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35 | #include <gdk/gdkkeysyms.h> |
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36 | #include <gtk/gtk.h> |
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37 | |
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38 | #include "gdm-scrollable-widget.h" |
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39 | #include "gdm-timer.h" |
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40 | |
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41 | #define GDM_SCROLLABLE_WIDGET_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_SCROLLABLE_WIDGET, GdmScrollableWidgetPrivate)) |
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42 | |
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43 | enum |
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44 | { |
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45 | SCROLL_CHILD, |
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46 | MOVE_FOCUS_OUT, |
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47 | NUMBER_OF_SIGNALS |
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48 | }; |
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49 | |
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50 | typedef struct GdmScrollableWidgetAnimation GdmScrollableWidgetAnimation; |
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51 | |
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52 | struct GdmScrollableWidgetPrivate |
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53 | { |
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54 | GtkWidget *scrollbar; |
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55 | |
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56 | GdmScrollableWidgetAnimation *animation; |
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57 | GtkWidget *invisible_event_sink; |
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58 | guint key_press_signal_id; |
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59 | guint key_release_signal_id; |
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60 | |
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61 | GQueue *key_event_queue; |
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62 | |
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63 | guint child_adjustments_stale : 1; |
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64 | }; |
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65 | |
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66 | struct GdmScrollableWidgetAnimation |
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67 | { |
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68 | GtkWidget *widget; |
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69 | GdmTimer *timer; |
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70 | int start_height; |
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71 | int desired_height; |
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72 | GdmScrollableWidgetSlideStepFunc step_func; |
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73 | gpointer step_func_user_data; |
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74 | GdmScrollableWidgetSlideDoneFunc done_func; |
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75 | gpointer done_func_user_data; |
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76 | }; |
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77 | |
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78 | static void gdm_scrollable_widget_class_init (GdmScrollableWidgetClass *klass); |
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79 | static void gdm_scrollable_widget_init (GdmScrollableWidget *clock_widget); |
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80 | static void gdm_scrollable_widget_finalize (GObject *object); |
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81 | |
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82 | static guint signals[NUMBER_OF_SIGNALS] = { 0 }; |
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83 | |
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84 | G_DEFINE_TYPE (GdmScrollableWidget, gdm_scrollable_widget, GTK_TYPE_BIN) |
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85 | |
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86 | static GdmScrollableWidgetAnimation * |
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87 | gdm_scrollable_widget_animation_new (GtkWidget *widget, |
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88 | int start_height, |
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89 | int desired_height, |
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90 | GdmScrollableWidgetSlideStepFunc step_func, |
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91 | gpointer step_func_user_data, |
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92 | GdmScrollableWidgetSlideDoneFunc done_func, |
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93 | gpointer done_func_user_data) |
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94 | { |
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95 | GdmScrollableWidgetAnimation *animation; |
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96 | |
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97 | animation = g_slice_new (GdmScrollableWidgetAnimation); |
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98 | |
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99 | animation->widget = widget; |
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100 | animation->timer = gdm_timer_new (); |
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101 | animation->start_height = start_height; |
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102 | animation->desired_height = desired_height; |
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103 | animation->step_func = step_func; |
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104 | animation->step_func_user_data = step_func_user_data; |
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105 | animation->done_func = done_func; |
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106 | animation->done_func_user_data = done_func_user_data; |
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107 | |
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108 | return animation; |
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109 | } |
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110 | |
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111 | static void |
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112 | gdm_scrollable_widget_animation_free (GdmScrollableWidgetAnimation *animation) |
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113 | { |
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114 | g_object_unref (animation->timer); |
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115 | animation->timer = NULL; |
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116 | g_slice_free (GdmScrollableWidgetAnimation, animation); |
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117 | } |
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118 | |
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119 | static void |
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120 | on_animation_tick (GdmScrollableWidgetAnimation *animation, |
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121 | double progress) |
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122 | { |
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123 | int progress_in_pixels; |
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124 | int width; |
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125 | int height; |
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126 | |
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127 | progress_in_pixels = progress * (animation->start_height - animation->desired_height); |
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128 | |
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129 | height = animation->start_height - progress_in_pixels; |
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130 | |
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131 | gtk_widget_get_size_request (animation->widget, &width, NULL); |
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132 | gtk_widget_set_size_request (animation->widget, width, height); |
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133 | |
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134 | if (animation->step_func != NULL) { |
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135 | animation->step_func (GDM_SCROLLABLE_WIDGET (animation->widget), |
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136 | progress, |
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137 | animation->step_func_user_data); |
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138 | } |
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139 | } |
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140 | |
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141 | static gboolean |
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142 | on_key_event (GdmScrollableWidget *scrollable_widget, |
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143 | GdkEventKey *key_event) |
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144 | { |
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145 | g_queue_push_tail (scrollable_widget->priv->key_event_queue, |
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146 | gdk_event_copy ((GdkEvent *)key_event)); |
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147 | return FALSE; |
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148 | } |
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149 | |
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150 | static gboolean |
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151 | gdm_scrollable_redirect_input_to_event_sink (GdmScrollableWidget *scrollable_widget) |
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152 | { |
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153 | GdkGrabStatus status; |
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154 | |
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155 | status = gdk_pointer_grab (scrollable_widget->priv->invisible_event_sink->window, |
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156 | FALSE, 0, NULL, NULL, GDK_CURRENT_TIME); |
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157 | if (status != GDK_GRAB_SUCCESS) { |
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158 | return FALSE; |
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159 | } |
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160 | |
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161 | status = gdk_keyboard_grab (scrollable_widget->priv->invisible_event_sink->window, |
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162 | FALSE, GDK_CURRENT_TIME); |
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163 | if (status != GDK_GRAB_SUCCESS) { |
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164 | gdk_pointer_ungrab (GDK_CURRENT_TIME); |
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165 | return FALSE; |
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166 | } |
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167 | |
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168 | scrollable_widget->priv->key_press_signal_id = |
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169 | g_signal_connect_swapped (scrollable_widget->priv->invisible_event_sink, |
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170 | "key-press-event", G_CALLBACK (on_key_event), |
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171 | scrollable_widget); |
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172 | |
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173 | scrollable_widget->priv->key_release_signal_id = |
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174 | g_signal_connect_swapped (scrollable_widget->priv->invisible_event_sink, |
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175 | "key-release-event", G_CALLBACK (on_key_event), |
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176 | scrollable_widget); |
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177 | |
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178 | return TRUE; |
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179 | } |
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180 | |
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181 | static void |
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182 | gdm_scrollable_unredirect_input (GdmScrollableWidget *scrollable_widget) |
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183 | { |
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184 | g_signal_handler_disconnect (scrollable_widget->priv->invisible_event_sink, |
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185 | scrollable_widget->priv->key_press_signal_id); |
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186 | scrollable_widget->priv->key_press_signal_id = 0; |
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187 | |
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188 | g_signal_handler_disconnect (scrollable_widget->priv->invisible_event_sink, |
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189 | scrollable_widget->priv->key_release_signal_id); |
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190 | scrollable_widget->priv->key_release_signal_id = 0; |
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191 | gdk_keyboard_ungrab (GDK_CURRENT_TIME); |
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192 | gdk_pointer_ungrab (GDK_CURRENT_TIME); |
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193 | } |
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194 | |
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195 | static void |
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196 | on_animation_stop (GdmScrollableWidgetAnimation *animation) |
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197 | { |
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198 | GdmScrollableWidget *widget; |
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199 | int width; |
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200 | |
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201 | widget = GDM_SCROLLABLE_WIDGET (animation->widget); |
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202 | |
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203 | if (animation->done_func != NULL) { |
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204 | animation->done_func (widget, animation->done_func_user_data); |
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205 | } |
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206 | |
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207 | gdm_scrollable_widget_animation_free (widget->priv->animation); |
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208 | widget->priv->animation = NULL; |
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209 | |
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210 | gtk_widget_get_size_request (GTK_WIDGET (widget), &width, NULL); |
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211 | gtk_widget_set_size_request (GTK_WIDGET (widget), width, -1); |
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212 | gtk_widget_queue_resize (GTK_WIDGET (widget)); |
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213 | |
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214 | gdm_scrollable_unredirect_input (widget); |
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215 | } |
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216 | |
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217 | static void |
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218 | gdm_scrollable_widget_animation_start (GdmScrollableWidgetAnimation *animation) |
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219 | { |
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220 | g_signal_connect_swapped (G_OBJECT (animation->timer), "tick", |
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221 | G_CALLBACK (on_animation_tick), |
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222 | animation); |
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223 | g_signal_connect_swapped (G_OBJECT (animation->timer), "stop", |
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224 | G_CALLBACK (on_animation_stop), |
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225 | animation); |
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226 | gdm_timer_start (animation->timer, .10); |
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227 | } |
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228 | |
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229 | static void |
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230 | gdm_scrollable_widget_animation_stop (GdmScrollableWidgetAnimation *animation) |
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231 | { |
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232 | gdm_timer_stop (animation->timer); |
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233 | } |
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234 | |
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235 | static gboolean |
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236 | gdm_scrollable_widget_needs_scrollbar (GdmScrollableWidget *widget) |
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237 | { |
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238 | GtkAdjustment *adjustment; |
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239 | |
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240 | if (widget->priv->scrollbar == NULL) { |
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241 | return FALSE; |
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242 | } |
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243 | |
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244 | if (widget->priv->animation != NULL) { |
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245 | return FALSE; |
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246 | } |
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247 | |
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248 | if (widget->priv->child_adjustments_stale) { |
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249 | return FALSE; |
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250 | } |
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251 | |
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252 | adjustment = gtk_range_get_adjustment (GTK_RANGE (widget->priv->scrollbar)); |
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253 | |
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254 | return adjustment->upper - adjustment->lower > adjustment->page_size; |
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255 | } |
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256 | |
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257 | static void |
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258 | gdm_scrollable_widget_size_request (GtkWidget *widget, |
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259 | GtkRequisition *requisition) |
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260 | { |
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261 | GdmScrollableWidget *scrollable_widget; |
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262 | GtkRequisition child_requisition; |
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263 | gboolean child_adjustments_stale; |
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264 | |
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265 | scrollable_widget = GDM_SCROLLABLE_WIDGET (widget); |
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266 | |
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267 | requisition->width = 2 * GTK_CONTAINER (widget)->border_width; |
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268 | requisition->height = 2 * GTK_CONTAINER (widget)->border_width; |
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269 | |
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270 | requisition->width += 2 * widget->style->xthickness; |
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271 | requisition->height += 2 * widget->style->ythickness; |
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272 | |
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273 | child_adjustments_stale = FALSE; |
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274 | if (GTK_BIN (widget)->child && GTK_WIDGET_VISIBLE (GTK_BIN (widget)->child)) { |
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275 | |
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276 | int old_child_height; |
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277 | gtk_widget_get_child_requisition (GTK_BIN (widget)->child, |
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278 | &child_requisition); |
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279 | old_child_height = child_requisition.height; |
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280 | |
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281 | gtk_widget_size_request (GTK_BIN (widget)->child, |
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282 | &child_requisition); |
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283 | |
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284 | requisition->width += child_requisition.width; |
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285 | requisition->height += child_requisition.height; |
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286 | |
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287 | child_adjustments_stale = old_child_height != child_requisition.height; |
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288 | } |
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289 | |
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290 | if (gdm_scrollable_widget_needs_scrollbar (scrollable_widget)) { |
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291 | GtkRequisition scrollbar_requisition; |
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292 | |
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293 | gtk_widget_show (scrollable_widget->priv->scrollbar); |
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294 | |
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295 | gtk_widget_size_request (scrollable_widget->priv->scrollbar, |
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296 | &scrollbar_requisition); |
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297 | |
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298 | requisition->height = MAX (requisition->height, |
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299 | scrollbar_requisition.height); |
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300 | requisition->width += scrollbar_requisition.width; |
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301 | } else { |
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302 | gtk_widget_hide (scrollable_widget->priv->scrollbar); |
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303 | } |
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304 | |
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305 | scrollable_widget->priv->child_adjustments_stale = child_adjustments_stale; |
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306 | } |
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307 | |
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308 | static void |
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309 | gdm_scrollable_widget_size_allocate (GtkWidget *widget, |
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310 | GtkAllocation *allocation) |
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311 | { |
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312 | GdmScrollableWidget *scrollable_widget; |
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313 | GtkAllocation scrollbar_allocation; |
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314 | GtkAllocation child_allocation; |
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315 | gboolean has_child; |
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316 | gboolean needs_scrollbar; |
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317 | gboolean is_flipped; |
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318 | |
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319 | scrollable_widget = GDM_SCROLLABLE_WIDGET (widget); |
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320 | |
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321 | widget->allocation = *allocation; |
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322 | |
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323 | has_child = GTK_BIN (widget)->child && GTK_WIDGET_VISIBLE (GTK_BIN (widget)->child); |
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324 | needs_scrollbar = gdm_scrollable_widget_needs_scrollbar (scrollable_widget); |
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325 | is_flipped = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL; |
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326 | |
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327 | if (needs_scrollbar) { |
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328 | GtkRequisition scrollbar_requisition; |
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329 | |
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330 | gtk_widget_get_child_requisition (scrollable_widget->priv->scrollbar, |
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331 | &scrollbar_requisition); |
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332 | |
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333 | scrollbar_allocation.width = scrollbar_requisition.width; |
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334 | |
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335 | if (!is_flipped) { |
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336 | scrollbar_allocation.x = allocation->x + allocation->width; |
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337 | scrollbar_allocation.x -= GTK_CONTAINER (widget)->border_width; |
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338 | scrollbar_allocation.x -= scrollbar_allocation.width; |
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339 | } else { |
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340 | scrollbar_allocation.x = allocation->x; |
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341 | scrollbar_allocation.x += GTK_CONTAINER (widget)->border_width; |
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342 | } |
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343 | |
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344 | scrollbar_allocation.height = allocation->height; |
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345 | scrollbar_allocation.height -= 2 * GTK_CONTAINER (widget)->border_width; |
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346 | |
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347 | scrollbar_allocation.y = allocation->y; |
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348 | scrollbar_allocation.y += GTK_CONTAINER (widget)->border_width; |
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349 | |
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350 | gtk_widget_size_allocate (scrollable_widget->priv->scrollbar, |
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351 | &scrollbar_allocation); |
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352 | } |
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353 | |
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354 | if (has_child) { |
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355 | child_allocation.width = allocation->width; |
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356 | child_allocation.width -= 2 * GTK_CONTAINER (widget)->border_width; |
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357 | child_allocation.width -= 2 * widget->style->xthickness; |
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358 | |
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359 | if (needs_scrollbar) { |
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360 | child_allocation.width -= scrollbar_allocation.width; |
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361 | } |
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362 | |
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363 | if (!is_flipped) { |
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364 | child_allocation.x = allocation->x; |
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365 | child_allocation.x += GTK_CONTAINER (widget)->border_width; |
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366 | child_allocation.x += widget->style->xthickness; |
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367 | } else { |
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368 | child_allocation.x = allocation->x + allocation->width; |
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369 | child_allocation.x -= GTK_CONTAINER (widget)->border_width; |
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370 | child_allocation.x -= child_allocation.width; |
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371 | child_allocation.x -= widget->style->xthickness; |
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372 | } |
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373 | |
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374 | child_allocation.height = allocation->height; |
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375 | child_allocation.height -= 2 * GTK_CONTAINER (widget)->border_width; |
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376 | child_allocation.height -= 2 * widget->style->ythickness; |
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377 | |
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378 | child_allocation.y = allocation->y; |
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379 | child_allocation.y += GTK_CONTAINER (widget)->border_width; |
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380 | child_allocation.y += widget->style->ythickness; |
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381 | |
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382 | gtk_widget_size_allocate (GTK_BIN (widget)->child, |
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383 | &child_allocation); |
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384 | scrollable_widget->priv->child_adjustments_stale = FALSE; |
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385 | } |
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386 | } |
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387 | |
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388 | static void |
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389 | gdm_scrollable_widget_add (GtkContainer *container, |
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390 | GtkWidget *child) |
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391 | { |
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392 | GtkAdjustment *adjustment; |
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393 | |
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394 | GTK_CONTAINER_CLASS (gdm_scrollable_widget_parent_class)->add (container, child); |
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395 | |
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396 | adjustment = gtk_range_get_adjustment (GTK_RANGE (GDM_SCROLLABLE_WIDGET (container)->priv->scrollbar)); |
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397 | |
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398 | g_signal_connect_swapped (adjustment, "changed", |
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399 | G_CALLBACK (gtk_widget_queue_resize), |
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400 | container); |
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401 | |
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402 | gtk_widget_set_scroll_adjustments (child, NULL, adjustment); |
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403 | } |
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404 | |
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405 | static void |
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406 | gdm_scrollable_widget_remove (GtkContainer *container, |
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407 | GtkWidget *child) |
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408 | { |
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409 | gtk_widget_set_scroll_adjustments (child, NULL, NULL); |
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410 | |
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411 | GTK_CONTAINER_CLASS (gdm_scrollable_widget_parent_class)->remove (container, child); |
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412 | } |
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413 | |
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414 | static void |
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415 | gdm_scrollable_widget_forall (GtkContainer *container, |
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416 | gboolean include_internals, |
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417 | GtkCallback callback, |
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418 | gpointer callback_data) |
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419 | { |
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420 | |
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421 | GdmScrollableWidget *scrollable_widget; |
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422 | |
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423 | scrollable_widget = GDM_SCROLLABLE_WIDGET (container); |
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424 | |
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425 | GTK_CONTAINER_CLASS (gdm_scrollable_widget_parent_class)->forall (container, |
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426 | include_internals, |
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427 | callback, |
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428 | callback_data); |
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429 | |
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430 | if (!include_internals) { |
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431 | return; |
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432 | } |
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433 | |
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434 | if (scrollable_widget->priv->scrollbar != NULL) { |
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435 | callback (scrollable_widget->priv->scrollbar, callback_data); |
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436 | } |
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437 | } |
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438 | |
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439 | static void |
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440 | gdm_scrollable_widget_destroy (GtkObject *object) |
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441 | { |
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442 | GdmScrollableWidget *scrollable_widget; |
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443 | |
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444 | scrollable_widget = GDM_SCROLLABLE_WIDGET (object); |
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445 | |
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446 | gtk_widget_unparent (scrollable_widget->priv->scrollbar); |
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447 | gtk_widget_destroy (scrollable_widget->priv->scrollbar); |
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448 | |
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449 | GTK_OBJECT_CLASS (gdm_scrollable_widget_parent_class)->destroy (object); |
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450 | } |
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451 | |
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452 | static void |
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453 | gdm_scrollable_widget_finalize (GObject *object) |
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454 | { |
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455 | GdmScrollableWidget *scrollable_widget; |
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456 | |
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457 | scrollable_widget = GDM_SCROLLABLE_WIDGET (object); |
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458 | |
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459 | g_queue_free (scrollable_widget->priv->key_event_queue); |
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460 | |
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461 | G_OBJECT_CLASS (gdm_scrollable_widget_parent_class)->finalize (object); |
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462 | } |
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463 | |
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464 | static gboolean |
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465 | gdm_scrollable_widget_expose_event (GtkWidget *widget, |
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466 | GdkEventExpose *event) |
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467 | { |
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468 | GdmScrollableWidget *scrollable_widget; |
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469 | int x; |
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470 | int y; |
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471 | int width; |
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472 | int height; |
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473 | gboolean is_flipped; |
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474 | |
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475 | scrollable_widget = GDM_SCROLLABLE_WIDGET (widget); |
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476 | |
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477 | if (!GTK_WIDGET_DRAWABLE (widget)) { |
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478 | return FALSE; |
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479 | } |
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480 | |
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481 | is_flipped = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL; |
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482 | |
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483 | x = widget->allocation.x; |
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484 | x += 2 * GTK_CONTAINER (widget)->border_width; |
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485 | |
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486 | width = widget->allocation.width; |
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487 | width -= 2 * GTK_CONTAINER (widget)->border_width; |
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488 | |
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489 | if (gdm_scrollable_widget_needs_scrollbar (scrollable_widget)) { |
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490 | width -= scrollable_widget->priv->scrollbar->allocation.width; |
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491 | |
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492 | if (is_flipped) { |
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493 | x += scrollable_widget->priv->scrollbar->allocation.width; |
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494 | } |
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495 | } |
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496 | |
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497 | y = widget->allocation.y; |
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498 | y += 2 * GTK_CONTAINER (widget)->border_width; |
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499 | |
---|
500 | height = widget->allocation.height; |
---|
501 | height -= 2 * GTK_CONTAINER (widget)->border_width; |
---|
502 | |
---|
503 | gtk_paint_shadow (widget->style, widget->window, |
---|
504 | GTK_WIDGET_STATE (widget), GTK_SHADOW_IN, |
---|
505 | &event->area, widget, "scrolled_window", |
---|
506 | x, y, width, height); |
---|
507 | |
---|
508 | return GTK_WIDGET_CLASS (gdm_scrollable_widget_parent_class)->expose_event (widget, event); |
---|
509 | } |
---|
510 | |
---|
511 | static gboolean |
---|
512 | gdm_scrollable_widget_scroll_event (GtkWidget *widget, |
---|
513 | GdkEventScroll *event) |
---|
514 | { |
---|
515 | if (event->direction != GDK_SCROLL_UP && event->direction != GDK_SCROLL_DOWN) { |
---|
516 | return FALSE; |
---|
517 | } |
---|
518 | |
---|
519 | if (!GTK_WIDGET_VISIBLE (GTK_WIDGET (widget))) { |
---|
520 | return FALSE; |
---|
521 | } |
---|
522 | |
---|
523 | return gtk_widget_event (GDM_SCROLLABLE_WIDGET (widget)->priv->scrollbar, |
---|
524 | (GdkEvent *) event); |
---|
525 | } |
---|
526 | |
---|
527 | static void |
---|
528 | add_scroll_binding (GtkBindingSet *binding_set, |
---|
529 | guint keyval, |
---|
530 | GdkModifierType mask, |
---|
531 | GtkScrollType scroll) |
---|
532 | { |
---|
533 | guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left; |
---|
534 | |
---|
535 | gtk_binding_entry_add_signal (binding_set, keyval, mask, |
---|
536 | "scroll-child", 1, |
---|
537 | GTK_TYPE_SCROLL_TYPE, scroll); |
---|
538 | gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask, |
---|
539 | "scroll-child", 1, |
---|
540 | GTK_TYPE_SCROLL_TYPE, scroll); |
---|
541 | } |
---|
542 | |
---|
543 | static void |
---|
544 | add_tab_bindings (GtkBindingSet *binding_set, |
---|
545 | GdkModifierType modifiers, |
---|
546 | GtkDirectionType direction) |
---|
547 | { |
---|
548 | gtk_binding_entry_add_signal (binding_set, GDK_Tab, modifiers, |
---|
549 | "move-focus-out", 1, |
---|
550 | GTK_TYPE_DIRECTION_TYPE, direction); |
---|
551 | gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, modifiers, |
---|
552 | "move-focus-out", 1, |
---|
553 | GTK_TYPE_DIRECTION_TYPE, direction); |
---|
554 | } |
---|
555 | |
---|
556 | static void |
---|
557 | gdm_scrollable_widget_class_install_bindings (GdmScrollableWidgetClass *klass) |
---|
558 | { |
---|
559 | GtkBindingSet *binding_set; |
---|
560 | |
---|
561 | binding_set = gtk_binding_set_by_class (klass); |
---|
562 | |
---|
563 | add_scroll_binding (binding_set, GDK_Up, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD); |
---|
564 | add_scroll_binding (binding_set, GDK_Down, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD); |
---|
565 | |
---|
566 | add_scroll_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_BACKWARD); |
---|
567 | add_scroll_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_FORWARD); |
---|
568 | |
---|
569 | add_scroll_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START); |
---|
570 | add_scroll_binding (binding_set, GDK_End, 0, GTK_SCROLL_END); |
---|
571 | |
---|
572 | add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD); |
---|
573 | add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD); |
---|
574 | } |
---|
575 | |
---|
576 | static void |
---|
577 | gdm_scrollable_widget_class_init (GdmScrollableWidgetClass *klass) |
---|
578 | { |
---|
579 | GObjectClass *object_class; |
---|
580 | GtkObjectClass *gtk_object_class; |
---|
581 | GtkWidgetClass *widget_class; |
---|
582 | GtkContainerClass *container_class; |
---|
583 | GdmScrollableWidgetClass *scrollable_widget_class; |
---|
584 | |
---|
585 | object_class = G_OBJECT_CLASS (klass); |
---|
586 | gtk_object_class = GTK_OBJECT_CLASS (klass); |
---|
587 | widget_class = GTK_WIDGET_CLASS (klass); |
---|
588 | container_class = GTK_CONTAINER_CLASS (klass); |
---|
589 | scrollable_widget_class = GDM_SCROLLABLE_WIDGET_CLASS (klass); |
---|
590 | |
---|
591 | object_class->finalize = gdm_scrollable_widget_finalize; |
---|
592 | |
---|
593 | gtk_object_class->destroy = gdm_scrollable_widget_destroy; |
---|
594 | |
---|
595 | widget_class->size_request = gdm_scrollable_widget_size_request; |
---|
596 | widget_class->size_allocate = gdm_scrollable_widget_size_allocate; |
---|
597 | widget_class->expose_event = gdm_scrollable_widget_expose_event; |
---|
598 | widget_class->scroll_event = gdm_scrollable_widget_scroll_event; |
---|
599 | |
---|
600 | container_class->add = gdm_scrollable_widget_add; |
---|
601 | container_class->remove = gdm_scrollable_widget_remove; |
---|
602 | container_class->forall = gdm_scrollable_widget_forall; |
---|
603 | |
---|
604 | signals[SCROLL_CHILD] = |
---|
605 | g_signal_new ("scroll-child", |
---|
606 | G_TYPE_FROM_CLASS (object_class), |
---|
607 | G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, |
---|
608 | G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child), |
---|
609 | NULL, NULL, |
---|
610 | g_cclosure_marshal_VOID__ENUM, |
---|
611 | G_TYPE_BOOLEAN, 1, |
---|
612 | GTK_TYPE_SCROLL_TYPE); |
---|
613 | signals[MOVE_FOCUS_OUT] = |
---|
614 | g_signal_new ("move-focus-out", |
---|
615 | G_TYPE_FROM_CLASS (object_class), |
---|
616 | G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, |
---|
617 | G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out), |
---|
618 | NULL, NULL, |
---|
619 | g_cclosure_marshal_VOID__ENUM, |
---|
620 | G_TYPE_NONE, 1, |
---|
621 | GTK_TYPE_DIRECTION_TYPE); |
---|
622 | gdm_scrollable_widget_class_install_bindings (klass); |
---|
623 | |
---|
624 | g_type_class_add_private (klass, sizeof (GdmScrollableWidgetPrivate)); |
---|
625 | } |
---|
626 | |
---|
627 | static void |
---|
628 | gdm_scrollable_widget_add_scrollbar (GdmScrollableWidget *widget) |
---|
629 | { |
---|
630 | gtk_widget_push_composite_child (); |
---|
631 | widget->priv->scrollbar = gtk_vscrollbar_new (NULL); |
---|
632 | gtk_widget_set_composite_name (widget->priv->scrollbar, "scrollbar"); |
---|
633 | gtk_widget_pop_composite_child (); |
---|
634 | gtk_widget_set_parent (widget->priv->scrollbar, GTK_WIDGET (widget)); |
---|
635 | g_object_ref (widget->priv->scrollbar); |
---|
636 | } |
---|
637 | |
---|
638 | static void |
---|
639 | gdm_scrollable_widget_add_invisible_event_sink (GdmScrollableWidget *widget) |
---|
640 | { |
---|
641 | widget->priv->invisible_event_sink = |
---|
642 | gtk_invisible_new_for_screen (gtk_widget_get_screen (GTK_WIDGET (widget))); |
---|
643 | gtk_widget_show (widget->priv->invisible_event_sink); |
---|
644 | |
---|
645 | widget->priv->key_event_queue = g_queue_new (); |
---|
646 | } |
---|
647 | |
---|
648 | static void |
---|
649 | gdm_scrollable_widget_init (GdmScrollableWidget *widget) |
---|
650 | { |
---|
651 | widget->priv = GDM_SCROLLABLE_WIDGET_GET_PRIVATE (widget); |
---|
652 | |
---|
653 | gdm_scrollable_widget_add_scrollbar (widget); |
---|
654 | gdm_scrollable_widget_add_invisible_event_sink (widget); |
---|
655 | } |
---|
656 | |
---|
657 | GtkWidget * |
---|
658 | gdm_scrollable_widget_new (void) |
---|
659 | { |
---|
660 | GObject *object; |
---|
661 | |
---|
662 | object = g_object_new (GDM_TYPE_SCROLLABLE_WIDGET, NULL); |
---|
663 | |
---|
664 | return GTK_WIDGET (object); |
---|
665 | } |
---|
666 | |
---|
667 | static gboolean |
---|
668 | gdm_scrollable_widget_animations_are_disabled (GdmScrollableWidget *scrollable_widget) |
---|
669 | { |
---|
670 | GtkSettings *settings; |
---|
671 | gboolean animations_are_enabled; |
---|
672 | |
---|
673 | settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (scrollable_widget))); |
---|
674 | g_object_get (settings, "gtk-enable-animations", &animations_are_enabled, NULL); |
---|
675 | |
---|
676 | return animations_are_enabled == FALSE; |
---|
677 | } |
---|
678 | |
---|
679 | void |
---|
680 | gdm_scrollable_widget_stop_sliding (GdmScrollableWidget *scrollable_widget) |
---|
681 | { |
---|
682 | g_return_if_fail (GDM_IS_SCROLLABLE_WIDGET (scrollable_widget)); |
---|
683 | |
---|
684 | if (scrollable_widget->priv->animation != NULL) { |
---|
685 | gdm_scrollable_widget_animation_stop (scrollable_widget->priv->animation); |
---|
686 | } |
---|
687 | |
---|
688 | g_assert (scrollable_widget->priv->animation == NULL); |
---|
689 | } |
---|
690 | |
---|
691 | void |
---|
692 | gdm_scrollable_widget_slide_to_height (GdmScrollableWidget *scrollable_widget, |
---|
693 | int height, |
---|
694 | GdmScrollableWidgetSlideStepFunc step_func, |
---|
695 | gpointer step_user_data, |
---|
696 | GdmScrollableWidgetSlideDoneFunc done_func, |
---|
697 | gpointer done_user_data) |
---|
698 | { |
---|
699 | GtkWidget *widget; |
---|
700 | gboolean input_redirected; |
---|
701 | |
---|
702 | g_return_if_fail (GDM_IS_SCROLLABLE_WIDGET (scrollable_widget)); |
---|
703 | widget = GTK_WIDGET (scrollable_widget); |
---|
704 | |
---|
705 | gdm_scrollable_widget_stop_sliding (scrollable_widget); |
---|
706 | |
---|
707 | input_redirected = gdm_scrollable_redirect_input_to_event_sink (scrollable_widget); |
---|
708 | |
---|
709 | if (!input_redirected || gdm_scrollable_widget_animations_are_disabled (scrollable_widget)) { |
---|
710 | if (step_func != NULL) { |
---|
711 | step_func (scrollable_widget, 0.0, step_user_data); |
---|
712 | } |
---|
713 | |
---|
714 | if (done_func != NULL) { |
---|
715 | done_func (scrollable_widget, done_user_data); |
---|
716 | } |
---|
717 | |
---|
718 | if (input_redirected) { |
---|
719 | gdm_scrollable_unredirect_input (scrollable_widget); |
---|
720 | } |
---|
721 | |
---|
722 | return; |
---|
723 | } |
---|
724 | |
---|
725 | height += widget->style->ythickness * 2; |
---|
726 | height += GTK_CONTAINER (widget)->border_width * 2; |
---|
727 | |
---|
728 | scrollable_widget->priv->animation = |
---|
729 | gdm_scrollable_widget_animation_new (widget, |
---|
730 | widget->allocation.height, |
---|
731 | height, step_func, step_user_data, |
---|
732 | done_func, done_user_data); |
---|
733 | |
---|
734 | gdm_scrollable_widget_animation_start (scrollable_widget->priv->animation); |
---|
735 | } |
---|
736 | |
---|
737 | gboolean |
---|
738 | gdm_scrollable_widget_has_queued_key_events (GdmScrollableWidget *widget) |
---|
739 | { |
---|
740 | g_return_val_if_fail (GDM_IS_SCROLLABLE_WIDGET (widget), FALSE); |
---|
741 | |
---|
742 | return !g_queue_is_empty (widget->priv->key_event_queue); |
---|
743 | } |
---|
744 | |
---|
745 | void |
---|
746 | gdm_scrollable_widget_replay_queued_key_events (GdmScrollableWidget *widget) |
---|
747 | { |
---|
748 | GtkWidget *toplevel; |
---|
749 | GdkEvent *event; |
---|
750 | |
---|
751 | toplevel = gtk_widget_get_toplevel (GTK_WIDGET (widget)); |
---|
752 | |
---|
753 | while ((event = g_queue_pop_head (widget->priv->key_event_queue)) != NULL) { |
---|
754 | gtk_propagate_event (toplevel, event); |
---|
755 | } |
---|
756 | } |
---|