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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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18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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0
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19
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20 #include <stdlib.h> /* for abort () */
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21 #include <limits.h>
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22
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23 #include "lwlib-Xlw.h"
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24 #include <X11/StringDefs.h>
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25 #include <X11/IntrinsicP.h>
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26 #include <X11/ObjectP.h>
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27 #include <X11/CompositeP.h>
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28 #include <X11/Shell.h>
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29 #ifdef MENUBARS_LUCID
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30 #include "xlwmenu.h"
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31 #endif
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32 #ifdef SCROLLBARS_LUCID
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33 #include "xlwscrollbar.h"
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34 #endif
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35
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36
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37
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38 #ifdef MENUBARS_LUCID
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39
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40 /* Menu callbacks */
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41
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42 static void
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43 pre_hook (Widget w, XtPointer client_data, XtPointer call_data)
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44 {
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45 widget_instance* instance = (widget_instance*)client_data;
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46 widget_value* val;
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47
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48 if (w->core.being_destroyed)
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49 return;
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50
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51 val = lw_get_widget_value_for_widget (instance, w);
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52 #if 0
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53 /* #### - this code used to (for some random back_asswards reason) pass
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54 the expression below in the call_data slot. For incremental menu
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55 construction, this needs to go. I can't even figure out why it was done
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70
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56 this way in the first place...it's just a historical wierdism. --Stig */
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0
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57 call_data = (val ? val->call_data : NULL);
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58 #endif
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59 if (val && val->call_data)
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60 abort(); /* #### - the call_data for the top_level
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61 "menubar" widget_value used to be passed
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62 back to the pre_hook. */
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63
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64 if (instance->info->pre_activate_cb)
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65 instance->info->pre_activate_cb (w, instance->info->id, call_data);
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66 }
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67
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68 static void
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69 pick_hook (Widget w, XtPointer client_data, XtPointer call_data)
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70 {
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71 widget_instance* instance = (widget_instance*)client_data;
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72 widget_value* contents_val = (widget_value*)call_data;
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73 widget_value* widget_val;
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74 XtPointer widget_arg;
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75 LWLIB_ID id;
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76 lw_callback post_activate_cb;
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77
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78 if (w->core.being_destroyed)
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79 return;
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80
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81 /* Grab these values before running any functions, in case running
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82 the selection_cb causes the widget to be destroyed. */
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83 id = instance->info->id;
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84 post_activate_cb = instance->info->post_activate_cb;
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85
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86 widget_val = lw_get_widget_value_for_widget (instance, w);
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87 widget_arg = widget_val ? widget_val->call_data : NULL;
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88
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89 if (instance->info->selection_cb &&
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90 contents_val &&
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91 contents_val->enabled &&
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92 !contents_val->contents)
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93 instance->info->selection_cb (w, id, contents_val->call_data);
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94
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95 if (post_activate_cb)
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96 post_activate_cb (w, id, widget_arg);
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97 }
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98
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99
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100
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101 /* creation functions */
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102 static Widget
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103 xlw_create_menubar (widget_instance* instance)
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104 {
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105 Widget widget =
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106 XtVaCreateWidget (instance->info->name, xlwMenuWidgetClass,
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107 instance->parent,
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108 XtNmenu, instance->info->val,
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109 0);
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70
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110 XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
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0
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111 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
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112 return widget;
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113 }
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114
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115 static Widget
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116 xlw_create_popup_menu (widget_instance* instance)
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117 {
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118 Widget popup_shell =
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119 XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
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120 instance->parent, NULL, 0);
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121
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122 Widget widget =
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123 XtVaCreateManagedWidget ("popup", xlwMenuWidgetClass,
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124 popup_shell,
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125 XtNmenu, instance->info->val,
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126 XtNhorizontal, False,
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127 0);
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128
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129 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
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130
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131 return popup_shell;
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132 }
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133 #endif /* MENUBARS_LUCID */
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134
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135 #ifdef SCROLLBARS_LUCID
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136 static void
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137 xlw_scrollbar_callback (Widget widget, XtPointer closure, XtPointer call_data)
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138 {
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139 widget_instance *instance = (widget_instance *) closure;
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140 LWLIB_ID id;
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141 XlwScrollBarCallbackStruct *data =
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142 (XlwScrollBarCallbackStruct *) call_data;
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143 scroll_event event_data;
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144 scrollbar_values *val =
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145 (scrollbar_values *) instance->info->val->scrollbar_data;
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146 double percent;
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147
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148 if (!instance || widget->core.being_destroyed)
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149 return;
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150
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151 id = instance->info->id;
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152
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153 percent = (double) (data->value - 1) / (double) (INT_MAX - 1);
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154 event_data.slider_value =
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155 (int) (percent * (double) (val->maximum - val->minimum)) + val->minimum;
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156
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70
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157 if (event_data.slider_value > (val->maximum - val->slider_size))
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158 event_data.slider_value = val->maximum - val->slider_size;
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0
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159 else if (event_data.slider_value < val->minimum)
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70
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160 event_data.slider_value = val->minimum;
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0
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161
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162 if (data->event)
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163 {
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70
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164 switch (data->event->xany.type)
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0
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165 {
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166 case KeyPress:
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167 case KeyRelease:
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168 event_data.time = data->event->xkey.time;
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169 break;
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170 case ButtonPress:
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171 case ButtonRelease:
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172 event_data.time = data->event->xbutton.time;
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173 break;
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174 case MotionNotify:
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175 event_data.time = data->event->xmotion.time;
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176 break;
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177 case EnterNotify:
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178 case LeaveNotify:
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179 event_data.time = data->event->xcrossing.time;
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180 break;
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181 default:
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182 event_data.time = 0;
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183 break;
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184 }
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185 }
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186 else
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187 event_data.time = 0;
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188
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189 switch (data->reason)
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190 {
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70
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191 case XmCR_DECREMENT:
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192 event_data.action = SCROLLBAR_LINE_UP;
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193 break;
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194 case XmCR_INCREMENT:
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195 event_data.action = SCROLLBAR_LINE_DOWN;
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196 break;
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197 case XmCR_PAGE_DECREMENT:
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198 event_data.action = SCROLLBAR_PAGE_UP;
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199 break;
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200 case XmCR_PAGE_INCREMENT:
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201 event_data.action = SCROLLBAR_PAGE_DOWN;
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202 break;
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203 case XmCR_TO_TOP:
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204 event_data.action = SCROLLBAR_TOP;
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205 break;
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206 case XmCR_TO_BOTTOM:
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207 event_data.action = SCROLLBAR_BOTTOM;
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208 break;
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209 case XmCR_DRAG:
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210 event_data.action = SCROLLBAR_DRAG;
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211 break;
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212 case XmCR_VALUE_CHANGED:
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213 event_data.action = SCROLLBAR_CHANGE;
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214 break;
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215 default:
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216 event_data.action = SCROLLBAR_CHANGE;
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217 break;
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0
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218 }
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219
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220 if (instance->info->pre_activate_cb)
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221 instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
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222 }
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223
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224 /* #### Does not yet support horizontal scrollbars. */
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225 static Widget
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226 xlw_create_scrollbar (widget_instance *instance, int vertical)
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227 {
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228 Arg al[20];
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229 int ac = 0;
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70
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230 Widget scrollbar;
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0
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231
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70
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232 XtSetArg (al[ac], (String) XmNminimum, 1); ac++;
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233 XtSetArg (al[ac], (String) XmNmaximum, INT_MAX); ac++;
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234 XtSetArg (al[ac], (String) XmNincrement, 1); ac++;
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235 XtSetArg (al[ac], (String) XmNpageIncrement, 1); ac++;
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236 if (vertical)
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237 {
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238 XtSetArg (al[ac], (String) XmNorientation, XmVERTICAL); ac++;
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239 }
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240 else
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241 {
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242 XtSetArg (al[ac], (String) XmNorientation, XmHORIZONTAL); ac++;
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243 }
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244
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245 scrollbar =
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246 XtCreateWidget (instance->info->name, xlwScrollBarWidgetClass, instance->parent, al, ac);
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0
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247
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70
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248 XtAddCallback(scrollbar, XmNdecrementCallback, xlw_scrollbar_callback,
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249 (XtPointer) instance);
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250 XtAddCallback(scrollbar, XmNdragCallback, xlw_scrollbar_callback,
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251 (XtPointer) instance);
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252 XtAddCallback(scrollbar, XmNincrementCallback, xlw_scrollbar_callback,
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253 (XtPointer) instance);
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254 XtAddCallback(scrollbar, XmNpageDecrementCallback, xlw_scrollbar_callback,
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255 (XtPointer) instance);
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256 XtAddCallback(scrollbar, XmNpageIncrementCallback, xlw_scrollbar_callback,
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257 (XtPointer) instance);
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258 XtAddCallback(scrollbar, XmNtoBottomCallback, xlw_scrollbar_callback,
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259 (XtPointer) instance);
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260 XtAddCallback(scrollbar, XmNtoTopCallback, xlw_scrollbar_callback,
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261 (XtPointer) instance);
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262 XtAddCallback(scrollbar, XmNvalueChangedCallback, xlw_scrollbar_callback,
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263 (XtPointer) instance);
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0
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264
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70
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265 return scrollbar;
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0
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266 }
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267
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268 static Widget
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269 xlw_create_vertical_scrollbar (widget_instance *instance)
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270 {
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271 return xlw_create_scrollbar (instance, 1);
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272 }
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273
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274 static Widget
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275 xlw_create_horizontal_scrollbar (widget_instance *instance)
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276 {
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277 return xlw_create_scrollbar (instance, 0);
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278 }
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279
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280 static void
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281 xlw_update_scrollbar (widget_instance *instance, Widget widget,
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282 widget_value *val)
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283 {
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284 if (val->scrollbar_data)
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285 {
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286 scrollbar_values *data = val->scrollbar_data;
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287 int widget_sliderSize, widget_val;
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288 int new_sliderSize, new_value;
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289 double percent;
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290
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70
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291 /*
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292 * First size and position the scrollbar widget.
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293 */
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0
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294 XtVaSetValues (widget,
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295 XtNx, data->scrollbar_x,
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296 XtNy, data->scrollbar_y,
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297 XtNwidth, data->scrollbar_width,
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298 XtNheight, data->scrollbar_height,
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299 0);
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300
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70
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301 /*
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302 * Now the size the scrollbar's slider.
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303 */
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304
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0
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305 XtVaGetValues (widget,
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306 XmNsliderSize, &widget_sliderSize,
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70
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307 XmNvalue, &widget_val,
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0
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308 0);
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309
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310 percent = (double) data->slider_size /
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311 (double) (data->maximum - data->minimum);
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312 percent = (percent > 1.0 ? 1.0 : percent);
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313 new_sliderSize = (int) ((double) (INT_MAX - 1) * percent);
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314
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315 percent = (double) (data->slider_position - data->minimum) /
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316 (double) (data->maximum - data->minimum);
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317 percent = (percent > 1.0 ? 1.0 : percent);
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318 new_value = (int) ((double) (INT_MAX - 1) * percent);
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319
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70
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320 if (new_sliderSize > (INT_MAX - 1))
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321 new_sliderSize = INT_MAX - 1;
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0
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322 if (new_sliderSize < 1)
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70
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323 new_sliderSize = 1;
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0
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324
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325 if (new_value > (INT_MAX - new_sliderSize))
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70
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326 new_value = INT_MAX - new_sliderSize;
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0
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327 else if (new_value < 1)
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70
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328 new_value = 1;
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0
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329
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330 if (new_sliderSize != widget_sliderSize || new_value != widget_val)
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331 XlwScrollBarSetValues (widget, new_value, new_sliderSize, 1, 1, False);
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332 }
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333 }
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334
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335 #endif /* SCROLLBARS_LUCID */
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336
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337 widget_creation_entry
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338 xlw_creation_table [] =
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339 {
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340 #ifdef MENUBARS_LUCID
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341 {"menubar", xlw_create_menubar},
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342 {"popup", xlw_create_popup_menu},
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343 #endif
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344 #ifdef SCROLLBARS_LUCID
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345 {"vertical-scrollbar", xlw_create_vertical_scrollbar},
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346 {"horizontal-scrollbar", xlw_create_horizontal_scrollbar},
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347 #endif
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348 {NULL, NULL}
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349 };
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350
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351 Boolean
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352 lw_lucid_widget_p (Widget widget)
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353 {
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354 WidgetClass the_class = XtClass (widget);
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355 #ifdef MENUBARS_LUCID
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356 if (the_class == xlwMenuWidgetClass)
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357 return True;
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358 #endif
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359 #ifdef SCROLLBARS_LUCID
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360 if (the_class == xlwScrollBarWidgetClass)
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361 return True;
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362 #endif
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363 #ifdef MENUBARS_LUCID
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364 if (the_class == overrideShellWidgetClass)
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365 return
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366 XtClass (((CompositeWidget)widget)->composite.children [0])
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367 == xlwMenuWidgetClass;
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368 #endif
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369 return False;
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370 }
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371
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372 void
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373 xlw_update_one_widget (widget_instance* instance, Widget widget,
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374 widget_value* val, Boolean deep_p)
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375 {
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376 WidgetClass class;
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377
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378 class = XtClass (widget);
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379
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380 if (0)
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381 ;
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382 #ifdef MENUBARS_LUCID
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383 else if (class == xlwMenuWidgetClass)
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384 {
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385 XlwMenuWidget mw;
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386 if (XtIsShell (widget))
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387 mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
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388 else
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389 mw = (XlwMenuWidget)widget;
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390 XtVaSetValues (widget, XtNmenu, val, 0);
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391 }
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392 #endif
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393 #ifdef SCROLLBARS_LUCID
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394 else if (class == xlwScrollBarWidgetClass)
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395 {
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396 xlw_update_scrollbar (instance, widget, val);
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397 }
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398 #endif
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399 }
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400
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401 void
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402 xlw_update_one_value (widget_instance* instance, Widget widget,
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403 widget_value* val)
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404 {
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405 return;
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406 }
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407
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408 void
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409 xlw_pop_instance (widget_instance* instance, Boolean up)
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410 {
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411 }
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412
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413 #ifdef MENUBARS_LUCID
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414 void
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415 xlw_popup_menu (Widget widget, XEvent *event)
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416 {
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417 XlwMenuWidget mw;
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418
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419 if (!XtIsShell (widget))
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420 return;
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421
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422 if (event->type == ButtonPress || event->type == ButtonRelease)
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423 {
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424 mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
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425 xlw_pop_up_menu (mw, (XButtonPressedEvent *)event);
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426 }
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427 else
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428 abort ();
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429 }
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430 #endif
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431
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432 /* Destruction of instances */
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433 void
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434 xlw_destroy_instance (widget_instance* instance)
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435 {
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436 if (instance->widget)
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437 XtDestroyWidget (instance->widget);
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438 }
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70
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439
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