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0
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1 /* The lwlib interface to "xlwmenu" menus.
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2 Copyright (C) 1992, 1994 Lucid, Inc.
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3
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4 This file is part of the Lucid Widget Library.
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5
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6 The Lucid Widget Library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 The Lucid Widget Library is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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70
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17 along with GNU Emacs; see the file COPYING. If not, write to
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78
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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0
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20
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21 #include <stdlib.h> /* for abort () */
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22 #include <limits.h>
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23
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24 #include "lwlib-Xlw.h"
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25 #include <X11/StringDefs.h>
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26 #include <X11/IntrinsicP.h>
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27 #include <X11/ObjectP.h>
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28 #include <X11/CompositeP.h>
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29 #include <X11/Shell.h>
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30 #ifdef MENUBARS_LUCID
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31 #include "xlwmenu.h"
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32 #endif
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33 #ifdef SCROLLBARS_LUCID
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34 #include "xlwscrollbar.h"
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35 #endif
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36
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37
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38
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39 #ifdef MENUBARS_LUCID
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40
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41 /* Menu callbacks */
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42
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43 static void
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44 pre_hook (Widget w, XtPointer client_data, XtPointer call_data)
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45 {
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46 widget_instance* instance = (widget_instance*)client_data;
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47 widget_value* val;
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48
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49 if (w->core.being_destroyed)
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50 return;
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51
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52 val = lw_get_widget_value_for_widget (instance, w);
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53 #if 0
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54 /* #### - this code used to (for some random back_asswards reason) pass
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55 the expression below in the call_data slot. For incremental menu
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56 construction, this needs to go. I can't even figure out why it was done
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78
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57 this way in the first place...it's just a historical weirdism. --Stig */
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0
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58 call_data = (val ? val->call_data : NULL);
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59 #endif
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60 if (val && val->call_data)
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61 abort(); /* #### - the call_data for the top_level
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62 "menubar" widget_value used to be passed
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63 back to the pre_hook. */
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64
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65 if (instance->info->pre_activate_cb)
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66 instance->info->pre_activate_cb (w, instance->info->id, call_data);
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67 }
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68
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69 static void
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70 pick_hook (Widget w, XtPointer client_data, XtPointer call_data)
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71 {
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72 widget_instance* instance = (widget_instance*)client_data;
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73 widget_value* contents_val = (widget_value*)call_data;
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74 widget_value* widget_val;
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75 XtPointer widget_arg;
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76 LWLIB_ID id;
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77 lw_callback post_activate_cb;
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78
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79 if (w->core.being_destroyed)
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80 return;
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81
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82 /* Grab these values before running any functions, in case running
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83 the selection_cb causes the widget to be destroyed. */
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84 id = instance->info->id;
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85 post_activate_cb = instance->info->post_activate_cb;
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86
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87 widget_val = lw_get_widget_value_for_widget (instance, w);
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88 widget_arg = widget_val ? widget_val->call_data : NULL;
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89
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90 if (instance->info->selection_cb &&
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91 contents_val &&
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92 contents_val->enabled &&
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93 !contents_val->contents)
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94 instance->info->selection_cb (w, id, contents_val->call_data);
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95
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96 if (post_activate_cb)
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97 post_activate_cb (w, id, widget_arg);
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98 }
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99
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100
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101
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102 /* creation functions */
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103 static Widget
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104 xlw_create_menubar (widget_instance* instance)
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105 {
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106 Widget widget =
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107 XtVaCreateWidget (instance->info->name, xlwMenuWidgetClass,
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108 instance->parent,
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109 XtNmenu, instance->info->val,
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110 0);
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70
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111 XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
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0
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112 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
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113 return widget;
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114 }
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115
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116 static Widget
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117 xlw_create_popup_menu (widget_instance* instance)
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118 {
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119 Widget popup_shell =
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120 XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
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121 instance->parent, NULL, 0);
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122
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123 Widget widget =
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124 XtVaCreateManagedWidget ("popup", xlwMenuWidgetClass,
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125 popup_shell,
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126 XtNmenu, instance->info->val,
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127 XtNhorizontal, False,
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128 0);
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129
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130 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
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131
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132 return popup_shell;
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133 }
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134 #endif /* MENUBARS_LUCID */
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135
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136 #ifdef SCROLLBARS_LUCID
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137 static void
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138 xlw_scrollbar_callback (Widget widget, XtPointer closure, XtPointer call_data)
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139 {
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140 widget_instance *instance = (widget_instance *) closure;
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141 LWLIB_ID id;
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142 XlwScrollBarCallbackStruct *data =
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143 (XlwScrollBarCallbackStruct *) call_data;
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144 scroll_event event_data;
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145 scrollbar_values *val =
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146 (scrollbar_values *) instance->info->val->scrollbar_data;
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147 double percent;
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148
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149 if (!instance || widget->core.being_destroyed)
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150 return;
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151
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152 id = instance->info->id;
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153
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154 percent = (double) (data->value - 1) / (double) (INT_MAX - 1);
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155 event_data.slider_value =
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156 (int) (percent * (double) (val->maximum - val->minimum)) + val->minimum;
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157
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70
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158 if (event_data.slider_value > (val->maximum - val->slider_size))
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159 event_data.slider_value = val->maximum - val->slider_size;
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0
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160 else if (event_data.slider_value < val->minimum)
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70
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161 event_data.slider_value = val->minimum;
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0
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162
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163 if (data->event)
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164 {
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78
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165 switch (data->event->type)
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0
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166 {
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167 case KeyPress:
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168 case KeyRelease:
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169 event_data.time = data->event->xkey.time;
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170 break;
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171 case ButtonPress:
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172 case ButtonRelease:
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173 event_data.time = data->event->xbutton.time;
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174 break;
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175 case MotionNotify:
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176 event_data.time = data->event->xmotion.time;
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177 break;
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178 case EnterNotify:
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179 case LeaveNotify:
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180 event_data.time = data->event->xcrossing.time;
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181 break;
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182 default:
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183 event_data.time = 0;
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184 break;
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185 }
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186 }
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187 else
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188 event_data.time = 0;
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189
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190 switch (data->reason)
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191 {
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70
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192 case XmCR_DECREMENT:
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193 event_data.action = SCROLLBAR_LINE_UP;
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194 break;
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195 case XmCR_INCREMENT:
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196 event_data.action = SCROLLBAR_LINE_DOWN;
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197 break;
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198 case XmCR_PAGE_DECREMENT:
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199 event_data.action = SCROLLBAR_PAGE_UP;
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200 break;
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201 case XmCR_PAGE_INCREMENT:
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202 event_data.action = SCROLLBAR_PAGE_DOWN;
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203 break;
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204 case XmCR_TO_TOP:
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205 event_data.action = SCROLLBAR_TOP;
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206 break;
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207 case XmCR_TO_BOTTOM:
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208 event_data.action = SCROLLBAR_BOTTOM;
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209 break;
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210 case XmCR_DRAG:
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211 event_data.action = SCROLLBAR_DRAG;
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212 break;
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213 case XmCR_VALUE_CHANGED:
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214 event_data.action = SCROLLBAR_CHANGE;
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215 break;
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216 default:
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217 event_data.action = SCROLLBAR_CHANGE;
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218 break;
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0
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219 }
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220
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221 if (instance->info->pre_activate_cb)
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222 instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
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223 }
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224
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78
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225 #define add_scrollbar_callback(resource) \
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226 XtAddCallback (scrollbar, resource, xlw_scrollbar_callback, (XtPointer) instance)
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227
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0
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228 /* #### Does not yet support horizontal scrollbars. */
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229 static Widget
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230 xlw_create_scrollbar (widget_instance *instance, int vertical)
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231 {
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232 Arg al[20];
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233 int ac = 0;
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78
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234 static XtCallbackRec callbacks[2] =
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235 { {xlw_scrollbar_callback, NULL}, {NULL, NULL} };
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236
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237 callbacks[0].closure = (XtPointer) instance;
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0
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238
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78
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239 XtSetArg (al[ac], XmNminimum, 1); ac++;
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240 XtSetArg (al[ac], XmNmaximum, INT_MAX); ac++;
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241 XtSetArg (al[ac], XmNincrement, 1); ac++;
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242 XtSetArg (al[ac], XmNpageIncrement, 1); ac++;
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243 XtSetArg (al[ac], XmNorientation, (vertical ? XmVERTICAL : XmHORIZONTAL)); ac++;
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0
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244
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78
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245 XtSetArg (al[ac], XmNdecrementCallback, callbacks); ac++;
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246 XtSetArg (al[ac], XmNdragCallback, callbacks); ac++;
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247 XtSetArg (al[ac], XmNincrementCallback, callbacks); ac++;
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248 XtSetArg (al[ac], XmNpageDecrementCallback, callbacks); ac++;
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249 XtSetArg (al[ac], XmNpageIncrementCallback, callbacks); ac++;
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250 XtSetArg (al[ac], XmNtoBottomCallback, callbacks); ac++;
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251 XtSetArg (al[ac], XmNtoTopCallback, callbacks); ac++;
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252 XtSetArg (al[ac], XmNvalueChangedCallback, callbacks); ac++;
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0
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253
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78
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254 return XtCreateWidget (instance->info->name, xlwScrollBarWidgetClass,
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255 instance->parent, al, ac);
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0
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256 }
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257
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258 static Widget
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259 xlw_create_vertical_scrollbar (widget_instance *instance)
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260 {
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261 return xlw_create_scrollbar (instance, 1);
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262 }
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263
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264 static Widget
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265 xlw_create_horizontal_scrollbar (widget_instance *instance)
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266 {
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267 return xlw_create_scrollbar (instance, 0);
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268 }
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269
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270 static void
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271 xlw_update_scrollbar (widget_instance *instance, Widget widget,
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272 widget_value *val)
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273 {
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274 if (val->scrollbar_data)
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275 {
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276 scrollbar_values *data = val->scrollbar_data;
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277 int widget_sliderSize, widget_val;
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278 int new_sliderSize, new_value;
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279 double percent;
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280
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78
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281 /* First size and position the scrollbar widget. */
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0
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282 XtVaSetValues (widget,
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283 XtNx, data->scrollbar_x,
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284 XtNy, data->scrollbar_y,
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285 XtNwidth, data->scrollbar_width,
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286 XtNheight, data->scrollbar_height,
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287 0);
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288
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78
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289 /* Now the size the scrollbar's slider. */
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70
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290
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0
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291 XtVaGetValues (widget,
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292 XmNsliderSize, &widget_sliderSize,
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70
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293 XmNvalue, &widget_val,
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0
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294 0);
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295
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296 percent = (double) data->slider_size /
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297 (double) (data->maximum - data->minimum);
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298 percent = (percent > 1.0 ? 1.0 : percent);
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299 new_sliderSize = (int) ((double) (INT_MAX - 1) * percent);
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300
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301 percent = (double) (data->slider_position - data->minimum) /
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302 (double) (data->maximum - data->minimum);
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303 percent = (percent > 1.0 ? 1.0 : percent);
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304 new_value = (int) ((double) (INT_MAX - 1) * percent);
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305
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70
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306 if (new_sliderSize > (INT_MAX - 1))
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307 new_sliderSize = INT_MAX - 1;
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0
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308 if (new_sliderSize < 1)
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70
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309 new_sliderSize = 1;
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0
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310
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311 if (new_value > (INT_MAX - new_sliderSize))
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70
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312 new_value = INT_MAX - new_sliderSize;
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0
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313 else if (new_value < 1)
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70
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314 new_value = 1;
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0
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315
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316 if (new_sliderSize != widget_sliderSize || new_value != widget_val)
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317 XlwScrollBarSetValues (widget, new_value, new_sliderSize, 1, 1, False);
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318 }
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319 }
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320
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321 #endif /* SCROLLBARS_LUCID */
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322
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323 widget_creation_entry
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324 xlw_creation_table [] =
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325 {
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326 #ifdef MENUBARS_LUCID
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327 {"menubar", xlw_create_menubar},
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328 {"popup", xlw_create_popup_menu},
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329 #endif
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330 #ifdef SCROLLBARS_LUCID
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331 {"vertical-scrollbar", xlw_create_vertical_scrollbar},
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332 {"horizontal-scrollbar", xlw_create_horizontal_scrollbar},
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333 #endif
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334 {NULL, NULL}
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335 };
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336
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337 Boolean
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338 lw_lucid_widget_p (Widget widget)
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339 {
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340 WidgetClass the_class = XtClass (widget);
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341 #ifdef MENUBARS_LUCID
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342 if (the_class == xlwMenuWidgetClass)
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343 return True;
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344 #endif
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345 #ifdef SCROLLBARS_LUCID
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346 if (the_class == xlwScrollBarWidgetClass)
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347 return True;
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348 #endif
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349 #ifdef MENUBARS_LUCID
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350 if (the_class == overrideShellWidgetClass)
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351 return
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352 XtClass (((CompositeWidget)widget)->composite.children [0])
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353 == xlwMenuWidgetClass;
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354 #endif
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355 return False;
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356 }
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357
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358 void
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359 xlw_update_one_widget (widget_instance* instance, Widget widget,
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360 widget_value* val, Boolean deep_p)
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361 {
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362 WidgetClass class;
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363
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364 class = XtClass (widget);
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365
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366 if (0)
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367 ;
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368 #ifdef MENUBARS_LUCID
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369 else if (class == xlwMenuWidgetClass)
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370 {
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371 XlwMenuWidget mw;
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372 if (XtIsShell (widget))
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373 mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
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374 else
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375 mw = (XlwMenuWidget)widget;
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376 XtVaSetValues (widget, XtNmenu, val, 0);
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377 }
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378 #endif
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379 #ifdef SCROLLBARS_LUCID
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380 else if (class == xlwScrollBarWidgetClass)
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381 {
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382 xlw_update_scrollbar (instance, widget, val);
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383 }
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384 #endif
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385 }
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386
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387 void
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388 xlw_update_one_value (widget_instance* instance, Widget widget,
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389 widget_value* val)
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390 {
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391 return;
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392 }
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393
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394 void
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395 xlw_pop_instance (widget_instance* instance, Boolean up)
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396 {
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397 }
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398
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399 #ifdef MENUBARS_LUCID
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400 void
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401 xlw_popup_menu (Widget widget, XEvent *event)
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402 {
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403 XlwMenuWidget mw;
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404
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405 if (!XtIsShell (widget))
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406 return;
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407
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408 if (event->type == ButtonPress || event->type == ButtonRelease)
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409 {
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410 mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
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411 xlw_pop_up_menu (mw, (XButtonPressedEvent *)event);
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412 }
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413 else
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414 abort ();
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415 }
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416 #endif
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417
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418 /* Destruction of instances */
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419 void
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420 xlw_destroy_instance (widget_instance* instance)
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421 {
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|
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422 if (instance->widget)
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423 XtDestroyWidget (instance->widget);
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424 }
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70
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425
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