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