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0
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1 /* scrollbar implementation -- X interface.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994 Amdhal Corporation.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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5 Copyright (C) 1995 Darrell Kindred <dkindred+@cmu.edu>.
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "console-x.h"
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30 #include "glyphs-x.h"
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31 #include "EmacsFrame.h"
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32 #include "EmacsManager.h"
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33 #include "gui-x.h"
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34 #include "scrollbar-x.h"
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35
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36 #include "frame.h"
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37 #include "window.h"
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38
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39 static void x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
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40 XtPointer client_data);
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41 static void x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
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42 XtPointer client_data);
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43
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44 /* Used to prevent changing the size of the thumb while drag
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45 scrolling, under Motif. This is necessary because the Motif
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46 scrollbar is incredibly stupid about updating the thumb and causes
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47 lots of flicker if it is done too often. */
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48 static int inhibit_thumb_size_change;
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49
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50 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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51 static int vertical_drag_in_progress;
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52 #endif
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53
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54
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55 /* A device method. */
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56 static int
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57 x_inhibit_scrollbar_thumb_size_change (void)
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58 {
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59 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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60 return inhibit_thumb_size_change;
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61 #else
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62 return 0;
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63 #endif
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64 }
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65
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66 /* A device method. */
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67 static void
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68 x_free_scrollbar_instance (struct scrollbar_instance *instance)
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69 {
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70 if (SCROLLBAR_X_NAME (instance))
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71 xfree (SCROLLBAR_X_NAME (instance));
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72
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73 if (SCROLLBAR_X_WIDGET (instance))
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74 {
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75 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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76 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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77
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78 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
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79 }
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80
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81 if (instance->scrollbar_data)
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82 xfree (instance->scrollbar_data);
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83 }
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84
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85 /* A device method. */
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86 static void
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87 x_release_scrollbar_instance (struct scrollbar_instance *instance)
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88 {
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89 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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90 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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91 }
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92
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93 /* A device method. */
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94 static void
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95 x_create_scrollbar_instance (struct frame *f, int vertical,
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96 struct scrollbar_instance *instance)
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97 {
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98 char buffer[32];
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99
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100 /* initialize the X specific data section. */
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101 instance->scrollbar_data = malloc_type_and_zero (struct x_scrollbar_data);
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102
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103 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
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104 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
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105 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
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106 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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107 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
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108 #endif
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109
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110 if (vertical)
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111 {
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112 SCROLLBAR_X_WIDGET (instance) =
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113 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
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114 SCROLLBAR_X_ID (instance),
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115 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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116 x_update_vertical_scrollbar_callback, NULL, NULL);
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117 }
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118 else
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119 {
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120 SCROLLBAR_X_WIDGET (instance) =
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121 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
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122 SCROLLBAR_X_ID (instance),
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123 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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124 x_update_horizontal_scrollbar_callback, NULL, NULL);
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125 }
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126 }
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127
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128 #define UPDATE_DATA_FIELD(field) \
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129 if (new_##field >= 0 && \
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130 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
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131 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
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132 inst->scrollbar_instance_changed = 1; \
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133 }
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134
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135 /* A device method. */
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136 /* #### The -1 check is such a hack. */
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137 static void
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138 x_update_scrollbar_instance_values (struct window *w,
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139 struct scrollbar_instance *inst,
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140 int new_line_increment,
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141 int new_page_increment,
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142 int new_minimum, int new_maximum,
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143 int new_slider_size,
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144 int new_slider_position,
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145 int new_scrollbar_width,
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146 int new_scrollbar_height,
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147 int new_scrollbar_x, int new_scrollbar_y)
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148 {
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149 UPDATE_DATA_FIELD (line_increment);
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150 UPDATE_DATA_FIELD (page_increment);
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151 UPDATE_DATA_FIELD (minimum);
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152 UPDATE_DATA_FIELD (maximum);
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153 UPDATE_DATA_FIELD (slider_size);
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154 UPDATE_DATA_FIELD (slider_position);
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155 UPDATE_DATA_FIELD (scrollbar_width);
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156 UPDATE_DATA_FIELD (scrollbar_height);
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157 UPDATE_DATA_FIELD (scrollbar_x);
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158 UPDATE_DATA_FIELD (scrollbar_y);
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159
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160 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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161 if (w && !vertical_drag_in_progress)
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162 {
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163 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
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164 int new_vows = marker_position (w->start[CURRENT_DISP]);
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165
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166 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
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167 {
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168 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
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169 inst->scrollbar_instance_changed = 1;
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170 }
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171 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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172 {
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173 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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174 inst->scrollbar_instance_changed = 1;
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175 }
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176 }
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177 #endif
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178 }
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179
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180 /* Used by x_update_scrollbar_instance_status. */
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181 static void
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182 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
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183 {
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184 Boolean use_backing_store;
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185
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186 XtVaGetValues (FRAME_X_TEXT_WIDGET (f),
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187 XtNuseBackingStore, &use_backing_store, 0);
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188
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189 if (use_backing_store && sb_widget)
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190 {
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191 unsigned long mask = CWBackingStore;
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192 XSetWindowAttributes attrs;
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193
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194 attrs.backing_store = Always;
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195 XChangeWindowAttributes (XtDisplay (sb_widget),
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196 XtWindow (sb_widget),
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197 mask,
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198 &attrs);
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199 }
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200 }
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201
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202 /* Create a widget value structure for passing down to lwlib so that
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203 it can update the scrollbar widgets. Used by
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204 x_update_scrollbar_instance_status. */
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205 static widget_value *
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206 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
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207 {
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208 widget_value *wv;
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209
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210 wv = xmalloc_widget_value ();
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211 /* #### maybe should add malloc_scrollbar_values to resource these? */
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212 wv->scrollbar_data = (scrollbar_values *)
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213 xmalloc (sizeof (scrollbar_values));
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214
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215 wv->name = SCROLLBAR_X_NAME (instance);
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216 wv->value = 0;
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217 wv->key = 0;
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218 wv->enabled = instance->scrollbar_is_active;
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219 wv->selected = 0;
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220 wv->call_data = NULL;
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221
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222 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
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223
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224 wv->next = NULL;
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225
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226 return wv;
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227 }
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228
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229 /* Used by x_update_scrollbar_instance_status. */
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230 static void
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231 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
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232 {
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233 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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234 {
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235 XDefineCursor (XtDisplay (wid), XtWindow (wid),
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236 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
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237 XSync (XtDisplay (wid), False);
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238 }
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239 }
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240
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241 /* A device method. */
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242 static void
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243 x_update_scrollbar_instance_status (struct window *w, int active, int size,
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244 struct scrollbar_instance *instance)
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245 {
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246 struct frame *f = XFRAME (w->frame);
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247 char managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
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248
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249 if (active && size)
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250 {
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251 widget_value *wv = scrollbar_instance_to_widget_value (instance);
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252
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253 if (instance->scrollbar_instance_changed)
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254 {
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255 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
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256 instance->scrollbar_instance_changed = 0;
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257 }
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258
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259 if (!managed)
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260 {
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261 XtManageChild (SCROLLBAR_X_WIDGET (instance));
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262 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
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263 {
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264 /* Raise this window so that it's visible on top of the
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265 text window below it. */
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266 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
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267 XtWindow (SCROLLBAR_X_WIDGET (instance)));
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268 update_one_widget_scrollbar_pointer
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269 (w, SCROLLBAR_X_WIDGET (instance));
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270 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
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271 {
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272 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
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273 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
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274 }
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275 }
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276 }
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277
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278 if (!wv->scrollbar_data) abort ();
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279 xfree (wv->scrollbar_data);
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280 wv->scrollbar_data = 0;
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281 free_widget_value (wv);
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282 }
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283 else if (managed)
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284 {
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285 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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286 }
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287 }
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288
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289 /* A device method. */
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290 static void
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291 x_scrollbar_width_changed_in_frame (Lisp_Object specifier, struct frame *f,
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292 Lisp_Object oldval)
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293 {
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294 XtWidgetGeometry req, repl;
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295 Lisp_Object newval = f->scrollbar_width;
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296
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297 in_specifier_change_function++;
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298
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299 /* We want the text area to stay the same size. So, we query the
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300 current size and then adjust it for the change in the scrollbar
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301 width. */
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302
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303 /* mirror the value in the frame resources, unless it was already
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304 done. */
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305 if (!in_resource_setting)
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306 XtVaSetValues (FRAME_X_TEXT_WIDGET (f), XtNscrollBarWidth,
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307 XINT (newval), 0);
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308
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309 if (XtIsRealized (FRAME_X_CONTAINER_WIDGET (f)))
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310 {
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311 req.request_mode = 0;
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312
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313 /* the query-geometry method looks at the current value of
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314 f->scrollbar_width, so temporarily set it back to the old
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315 one. */
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316 f->scrollbar_width = oldval;
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317 XtQueryGeometry (FRAME_X_CONTAINER_WIDGET (f), &req, &repl);
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318 f->scrollbar_width = newval;
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319
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320 repl.width += XINT (newval) - XINT (oldval);
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321 EmacsManagerChangeSize (FRAME_X_CONTAINER_WIDGET (f), repl.width,
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322 repl.height);
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323 }
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324
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325 in_specifier_change_function--;
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326 }
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327
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328 /* A device method. */
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329 static void
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330 x_scrollbar_height_changed_in_frame (Lisp_Object specifier, struct frame *f,
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331 Lisp_Object oldval)
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332 {
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333 XtWidgetGeometry req, repl;
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334 Lisp_Object newval = f->scrollbar_height;
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335
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336 in_specifier_change_function++;
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337
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338 /* We want the text area to stay the same size. So, we query the
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339 current size and then adjust it for the change in the scrollbar
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340 height. */
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341
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342 /* mirror the value in the frame resources, unless it was already
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343 done. Also don't do it if this is the when the frame is being
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344 created -- the widgets don't even exist yet, and even if they
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345 did, we wouldn't want to overwrite the resource information
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346 (which might specify a user preference). */
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347 if (!in_resource_setting)
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348 XtVaSetValues (FRAME_X_TEXT_WIDGET (f), XtNscrollBarHeight,
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349 XINT (newval), 0);
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350
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351 if (XtIsRealized (FRAME_X_CONTAINER_WIDGET (f)))
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352 {
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353 req.request_mode = 0;
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354
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355 /* the query-geometry method looks at the current value of
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356 f->scrollbar_height, so temporarily set it back to the old
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357 one. */
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358 f->scrollbar_height = oldval;
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359 XtQueryGeometry (FRAME_X_CONTAINER_WIDGET (f), &req, &repl);
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360 f->scrollbar_height = newval;
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361
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362 repl.height += XINT (newval) - XINT (oldval);
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363 EmacsManagerChangeSize (FRAME_X_CONTAINER_WIDGET (f), repl.width,
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364 repl.height);
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365 }
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366
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367 in_specifier_change_function--;
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368 }
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369
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370 enum x_scrollbar_loop
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371 {
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372 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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373 X_SET_SCROLLBAR_POINTER,
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374 X_WINDOW_IS_SCROLLBAR,
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375 X_UPDATE_FRAME_SCROLLBARS
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376 };
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377
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378 static struct window_mirror *
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379 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
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380 struct window_mirror *mir,
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381 LWLIB_ID id, Window x_win)
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382 {
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383 struct window_mirror *retval = NULL;
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384
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385 while (mir)
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386 {
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387 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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388 struct scrollbar_instance *hinstance =
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389 mir->scrollbar_horizontal_instance;
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390 struct frame *f;
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391
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392 assert (!NILP (window));
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393 f = XFRAME (XWINDOW (window)->frame);
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394
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395 if (mir->vchild)
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396 {
|
|
|
397 retval = x_scrollbar_loop (type, XWINDOW (window)->vchild,
|
|
|
398 mir->vchild, id, x_win);
|
|
|
399 }
|
|
|
400 else if (mir->hchild)
|
|
|
401 {
|
|
|
402 retval = x_scrollbar_loop (type, XWINDOW (window)->hchild,
|
|
|
403 mir->hchild, id, x_win);
|
|
|
404 }
|
|
|
405
|
|
|
406 if (retval != NULL)
|
|
|
407 return retval;
|
|
|
408
|
|
|
409 if (hinstance || vinstance)
|
|
|
410 {
|
|
|
411 switch (type)
|
|
|
412 {
|
|
|
413 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
|
|
|
414 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id)
|
|
|
415 || (hinstance && SCROLLBAR_X_ID (hinstance) == id))
|
|
|
416 {
|
|
|
417 return mir;
|
|
|
418 }
|
|
|
419 break;
|
|
|
420 case X_UPDATE_FRAME_SCROLLBARS:
|
|
|
421 if (!mir->vchild && !mir->hchild)
|
|
|
422 update_window_scrollbars (XWINDOW (window), mir, 1, 0);
|
|
|
423 break;
|
|
|
424 case X_SET_SCROLLBAR_POINTER:
|
|
|
425 if (!mir->vchild && !mir->hchild)
|
|
|
426 {
|
|
|
427 int loop;
|
|
|
428
|
|
|
429 for (loop = 0; loop < 2; loop++)
|
|
|
430 {
|
|
|
431 Widget widget;
|
|
|
432
|
|
|
433 if (loop)
|
|
|
434 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
|
435 else
|
|
|
436 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
|
437
|
|
|
438 if (widget && XtIsManaged (widget))
|
|
|
439 {
|
|
|
440 update_one_widget_scrollbar_pointer
|
|
|
441 (XWINDOW (window), widget);
|
|
|
442 }
|
|
|
443 }
|
|
|
444 }
|
|
|
445 break;
|
|
|
446 case X_WINDOW_IS_SCROLLBAR:
|
|
|
447 if (!mir->vchild && !mir->hchild)
|
|
|
448 {
|
|
|
449 int loop;
|
|
|
450
|
|
|
451 for (loop = 0; loop < 2; loop++)
|
|
|
452 {
|
|
|
453 Widget widget;
|
|
|
454
|
|
|
455 if (loop)
|
|
|
456 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
|
457 else
|
|
|
458 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
|
459
|
|
|
460 if (widget && XtIsManaged (widget))
|
|
|
461 {
|
|
|
462 if (XtWindow (widget) == x_win)
|
|
|
463 return (struct window_mirror *) 1;
|
|
|
464 }
|
|
|
465 }
|
|
|
466 }
|
|
|
467 break;
|
|
|
468 default:
|
|
|
469 abort ();
|
|
|
470 }
|
|
|
471 }
|
|
|
472
|
|
|
473 mir = mir->next;
|
|
|
474 window = XWINDOW (window)->next;
|
|
|
475 }
|
|
|
476
|
|
|
477 return NULL;
|
|
|
478 }
|
|
|
479
|
|
|
480 /* Used by callbacks. */
|
|
|
481 static struct window_mirror *
|
|
|
482 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
|
|
|
483 {
|
|
|
484 if (f->mirror_dirty)
|
|
|
485 update_frame_window_mirror (f);
|
|
|
486 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
|
487 f->root_mirror, id, (Window) NULL);
|
|
|
488 }
|
|
|
489
|
|
|
490 /*
|
|
|
491 * This is the only callback provided for vertical scrollbars. It
|
|
|
492 * should be able to handle all of the scrollbar events in
|
|
|
493 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
494 * scroll_event (see lwlib.h). */
|
|
|
495 static void
|
|
|
496 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
497 XtPointer client_data)
|
|
|
498 {
|
|
|
499 /* This function can GC */
|
|
|
500 scroll_event *data = (scroll_event *) client_data;
|
|
|
501 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
502 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
503 Lisp_Object win;
|
|
|
504 struct scrollbar_instance *instance;
|
|
|
505 struct window_mirror *mirror;
|
|
|
506
|
|
|
507 if (!f)
|
|
|
508 return;
|
|
|
509
|
|
|
510 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
511 win = real_window (mirror, 1);
|
|
|
512
|
|
|
513 if (NILP (win))
|
|
|
514 return;
|
|
|
515 instance = mirror->scrollbar_vertical_instance;
|
|
|
516
|
|
|
517 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
518 is called. #### Why??? */
|
|
|
519 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
520
|
|
|
521 switch (data->action)
|
|
|
522 {
|
|
|
523 case SCROLLBAR_LINE_UP:
|
|
|
524 signal_special_Xt_user_event (win, Qscrollbar_line_up, win);
|
|
|
525 break;
|
|
|
526
|
|
|
527 case SCROLLBAR_LINE_DOWN:
|
|
|
528 signal_special_Xt_user_event (win, Qscrollbar_line_down, win);
|
|
|
529 break;
|
|
|
530
|
|
|
531 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
532 Depending on where you click the size of the page varies.
|
|
|
533 Motif always does a standard Emacs page. */
|
|
|
534 case SCROLLBAR_PAGE_UP:
|
|
|
535 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
536 {
|
|
|
537 double tmp = ((double) data->slider_value /
|
|
|
538 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
539 double line = tmp *
|
|
|
540 (double) window_displayed_height (XWINDOW (win));
|
|
|
541
|
|
|
542 if (line > -1.0)
|
|
|
543 line = -1.0;
|
|
|
544 signal_special_Xt_user_event (win, Qscrollbar_page_up,
|
|
|
545 Fcons (win, make_int ((int) line)));
|
|
|
546 }
|
|
|
547 #else
|
|
|
548 signal_special_Xt_user_event (win, Qscrollbar_page_up,
|
|
|
549 Fcons (win, Qnil));
|
|
|
550 #endif
|
|
|
551 break;
|
|
|
552
|
|
|
553 case SCROLLBAR_PAGE_DOWN:
|
|
|
554 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
555 {
|
|
|
556 double tmp = ((double) data->slider_value /
|
|
|
557 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
558 double line = tmp *
|
|
|
559 (double) window_displayed_height (XWINDOW (win));
|
|
|
560
|
|
|
561 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
562 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
563 {
|
|
|
564 if (line < 1.0)
|
|
|
565 line = 1.0;
|
|
|
566 signal_special_Xt_user_event (win, Qscrollbar_page_down,
|
|
|
567 Fcons (win,
|
|
|
568 make_int ((int) line)));
|
|
|
569 }
|
|
|
570 }
|
|
|
571 #else
|
|
|
572 signal_special_Xt_user_event (win, Qscrollbar_page_down,
|
|
|
573 Fcons (win, Qnil));
|
|
|
574 #endif
|
|
|
575 break;
|
|
|
576
|
|
|
577 case SCROLLBAR_TOP:
|
|
|
578 signal_special_Xt_user_event (win, Qscrollbar_to_top, win);
|
|
|
579 break;
|
|
|
580
|
|
|
581 case SCROLLBAR_BOTTOM:
|
|
|
582 signal_special_Xt_user_event (win, Qscrollbar_to_bottom, win);
|
|
|
583 break;
|
|
|
584
|
|
|
585
|
|
|
586 case SCROLLBAR_CHANGE:
|
|
|
587 inhibit_thumb_size_change = 0;
|
|
|
588 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
589 vertical_drag_in_progress = 0;
|
|
|
590 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
591 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
592 XINT (Fwindow_start (win));
|
|
|
593 #endif
|
|
|
594 break;
|
|
|
595
|
|
|
596 case SCROLLBAR_DRAG:
|
|
|
597 {
|
|
|
598 int value;
|
|
|
599
|
|
|
600 inhibit_thumb_size_change = 1;
|
|
|
601
|
|
|
602 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
603 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
604 want to avoid having the window position jump when you
|
|
|
605 first grab the scrollbar, but we also want to ensure that
|
|
|
606 you can scroll all the way to the top or bottom of the
|
|
|
607 buffer. This can all be replaced with something sane when
|
|
|
608 we get line-based scrolling. */
|
|
|
609
|
|
|
610 vertical_drag_in_progress = 1;
|
|
|
611
|
|
|
612 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
|
613 {
|
|
|
614 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
615 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
616 XINT (Fwindow_start (win));
|
|
|
617 }
|
|
|
618
|
|
|
619 /* Could replace this piecewise linear scrolling with a
|
|
|
620 quadratic through the three points, but I'm not sure that
|
|
|
621 would feel any nicer in practice. */
|
|
|
622 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
|
623 {
|
|
|
624 /* We've dragged up; slide linearly from original position to
|
|
|
625 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
626
|
|
|
627 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
628 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
629 {
|
|
|
630 /* shouldn't get here, but just in case */
|
|
|
631 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
632 }
|
|
|
633 else
|
|
|
634 {
|
|
|
635 value = (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
636 + (((double)
|
|
|
637 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
638 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
639 * (data->slider_value -
|
|
|
640 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
|
641 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
642 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
|
643 }
|
|
|
644 }
|
|
|
645 else
|
|
|
646 {
|
|
|
647 /* We've dragged down; slide linearly from original position to
|
|
|
648 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
649
|
|
|
650 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
651 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
652 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
653 {
|
|
|
654 /* avoid divide by zero */
|
|
|
655 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
|
656 }
|
|
|
657 else
|
|
|
658 {
|
|
|
659 value = (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
660 + (((double) (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
661 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
|
662 * (data->slider_value
|
|
|
663 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
|
664 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
665 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
666 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
|
667 }
|
|
|
668 }
|
|
|
669 #else
|
|
|
670 value = data->slider_value;
|
|
|
671 #endif
|
|
|
672
|
|
|
673 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
674 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
675 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
676 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
677
|
|
|
678 signal_special_Xt_user_event (win, Qscrollbar_vertical_drag,
|
|
|
679 Fcons (win, make_int (value)));
|
|
|
680 }
|
|
|
681 break;
|
|
|
682
|
|
|
683 }
|
|
|
684 }
|
|
|
685
|
|
|
686 /*
|
|
|
687 * This is the only callback provided for horizontal scrollbars. It
|
|
|
688 * should be able to handle all of the scrollbar events in
|
|
|
689 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
690 * scroll_event (see lwlib.h). */
|
|
|
691 static void
|
|
|
692 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
693 XtPointer client_data)
|
|
|
694 {
|
|
|
695 scroll_event *data = (scroll_event *) client_data;
|
|
|
696 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
697 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
698 Lisp_Object win;
|
|
|
699 struct window_mirror *mirror;
|
|
|
700
|
|
|
701 if (!f)
|
|
|
702 return;
|
|
|
703
|
|
|
704 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
705 win = real_window (mirror, 1);
|
|
|
706
|
|
|
707 if (NILP (win))
|
|
|
708 return;
|
|
|
709
|
|
|
710 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
711 is called. #### Why??? */
|
|
|
712 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
713
|
|
|
714 switch (data->action)
|
|
|
715 {
|
|
|
716 case SCROLLBAR_LINE_UP:
|
|
|
717 signal_special_Xt_user_event (win, Qscrollbar_char_left, win);
|
|
|
718 break;
|
|
|
719 case SCROLLBAR_LINE_DOWN:
|
|
|
720 signal_special_Xt_user_event (win, Qscrollbar_char_right, win);
|
|
|
721 break;
|
|
|
722 case SCROLLBAR_PAGE_UP:
|
|
|
723 signal_special_Xt_user_event (win, Qscrollbar_page_left, win);
|
|
|
724 break;
|
|
|
725 case SCROLLBAR_PAGE_DOWN:
|
|
|
726 signal_special_Xt_user_event (win, Qscrollbar_page_right, win);
|
|
|
727 break;
|
|
|
728 case SCROLLBAR_TOP:
|
|
|
729 signal_special_Xt_user_event (win, Qscrollbar_to_left, win);
|
|
|
730 break;
|
|
|
731 case SCROLLBAR_BOTTOM:
|
|
|
732 signal_special_Xt_user_event (win, Qscrollbar_to_right, win);
|
|
|
733 break;
|
|
|
734 case SCROLLBAR_CHANGE:
|
|
|
735 inhibit_thumb_size_change = 0;
|
|
|
736 break;
|
|
|
737 case SCROLLBAR_DRAG:
|
|
|
738 inhibit_thumb_size_change = 1;
|
|
|
739 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
740 Lucid is the one mostly wrong.*/
|
|
|
741 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
742 signal_special_Xt_user_event (win, Qscrollbar_horizontal_drag,
|
|
|
743 (Fcons
|
|
|
744 (win, make_int (data->slider_value))));
|
|
|
745 #else
|
|
|
746 signal_special_Xt_user_event (win, Qscrollbar_horizontal_drag,
|
|
|
747 (Fcons
|
|
|
748 (win,
|
|
|
749 make_int (data->slider_value - 1))));
|
|
|
750 #endif
|
|
|
751 break;
|
|
|
752 default:
|
|
|
753 break;
|
|
|
754 }
|
|
|
755 }
|
|
|
756
|
|
|
757 static void
|
|
|
758 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
759 {
|
|
|
760 Lisp_Object window = Qnil;
|
|
|
761
|
|
|
762 XSETWINDOW (window, w);
|
|
|
763 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
|
764 0, (Window) NULL);
|
|
|
765 }
|
|
|
766
|
|
|
767 /* Called directly from x_any_window_to_frame in frame-x.c */
|
|
|
768 EMACS_INT
|
|
|
769 x_window_is_scrollbar (struct frame *f, Window win)
|
|
|
770 {
|
|
|
771 if (!FRAME_X_P (f))
|
|
|
772 return 0;
|
|
|
773
|
|
|
774 if (f->mirror_dirty)
|
|
|
775 update_frame_window_mirror (f);
|
|
|
776 return (EMACS_INT) x_scrollbar_loop (X_WINDOW_IS_SCROLLBAR, f->root_window,
|
|
|
777 f->root_mirror, 0, win);
|
|
|
778 }
|
|
|
779
|
|
|
780 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
781 directly from x_set_frame_properties in frame-x.c*/
|
|
|
782 void
|
|
|
783 x_update_frame_scrollbars (struct frame *f)
|
|
|
784 {
|
|
|
785 /* Consider this code to be "in_display" so that we abort() if Fsignal()
|
|
|
786 gets called. */
|
|
|
787 in_display++;
|
|
|
788 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window, f->root_mirror,
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789 0, (Window) NULL);
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790 in_display--;
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|
791 if (in_display < 0) abort ();
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792 }
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|
|
793
|
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794 #ifdef MEMORY_USAGE_STATS
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|
|
795
|
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796 static int
|
|
|
797 x_compute_scrollbar_instance_usage (struct device *d,
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798 struct scrollbar_instance *inst,
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799 struct overhead_stats *ovstats)
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800 {
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801 int total = 0;
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|
802
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803 while (inst)
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804 {
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805 struct x_scrollbar_data *data =
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806 (struct x_scrollbar_data *) inst->scrollbar_data;
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807
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808 total += malloced_storage_size (data, sizeof (*data), ovstats);
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|
809 total += malloced_storage_size (data->name, 1 + strlen (data->name),
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|
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810 ovstats);
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|
811 inst = inst->next;
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812 }
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813
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814 return total;
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|
|
815 }
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|
816
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817 #endif /* MEMORY_USAGE_STATS */
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|
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818
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819
|
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820 /************************************************************************/
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|
821 /* initialization */
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822 /************************************************************************/
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|
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823
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|
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824 void
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|
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825 console_type_create_scrollbar_x (void)
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826 {
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827 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_thumb_size_change);
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828 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
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|
829 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
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|
|
830 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
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|
|
831 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
832 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
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|
|
833 CONSOLE_HAS_METHOD (x, scrollbar_width_changed_in_frame);
|
|
|
834 CONSOLE_HAS_METHOD (x, scrollbar_height_changed_in_frame);
|
|
|
835 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
836 #ifdef MEMORY_USAGE_STATS
|
|
|
837 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
838 #endif /* MEMORY_USAGE_STATS */
|
|
|
839 }
|
|
|
840
|
|
|
841 void
|
|
|
842 vars_of_scrollbar_x (void)
|
|
|
843 {
|
|
|
844 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
845 Fprovide (intern ("lucid-scrollbars"));
|
|
|
846 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
847 Fprovide (intern ("motif-scrollbars"));
|
|
|
848 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
|
849 Fprovide (intern ("athena-scrollbars"));
|
|
|
850 #endif
|
|
|
851 }
|
