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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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102
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44 /* Used to prevent changing the size of the slider while drag
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0
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45 scrolling, under Motif. This is necessary because the Motif
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102
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46 scrollbar is incredibly stupid about updating the slider and causes
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0
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47 lots of flicker if it is done too often. */
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102
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48 static int inhibit_slider_size_change;
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86
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49 int stupid_vertical_scrollbar_drag_hack;
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0
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50
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82
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51 /* Doesn't work with athena */
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0
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52 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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53 static int vertical_drag_in_progress;
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54 #endif
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55
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56
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57 /* A device method. */
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58 static int
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102
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59 x_inhibit_scrollbar_slider_size_change (void)
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0
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60 {
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84
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61 /* Doesn't work with Athena */
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0
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62 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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102
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63 return inhibit_slider_size_change;
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0
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64 #else
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65 return 0;
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66 #endif
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67 }
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68
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69 /* A device method. */
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70 static void
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71 x_free_scrollbar_instance (struct scrollbar_instance *instance)
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72 {
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73 if (SCROLLBAR_X_NAME (instance))
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74 xfree (SCROLLBAR_X_NAME (instance));
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75
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76 if (SCROLLBAR_X_WIDGET (instance))
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77 {
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78 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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79 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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80
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81 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
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82 }
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83
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84 if (instance->scrollbar_data)
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85 xfree (instance->scrollbar_data);
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86 }
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87
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88 /* A device method. */
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89 static void
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90 x_release_scrollbar_instance (struct scrollbar_instance *instance)
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91 {
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92 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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93 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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94 }
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95
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96 /* A device method. */
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97 static void
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98 x_create_scrollbar_instance (struct frame *f, int vertical,
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99 struct scrollbar_instance *instance)
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100 {
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101 char buffer[32];
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102
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103 /* initialize the X specific data section. */
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185
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104 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
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0
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105
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106 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
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107 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
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108 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
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82
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109 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
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110 defined (LWLIB_SCROLLBARS_ATHENA3D)
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0
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111 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
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112 #endif
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113
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114 if (vertical)
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115 {
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116 SCROLLBAR_X_WIDGET (instance) =
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117 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
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118 SCROLLBAR_X_ID (instance),
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119 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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120 x_update_vertical_scrollbar_callback, NULL, NULL);
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121 }
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122 else
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123 {
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124 SCROLLBAR_X_WIDGET (instance) =
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125 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
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126 SCROLLBAR_X_ID (instance),
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127 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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128 x_update_horizontal_scrollbar_callback, NULL, NULL);
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129 }
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130 }
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131
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102
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132 #define UPDATE_DATA_FIELD(field) \
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133 if (new_##field >= 0 && \
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134 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
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135 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
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136 inst->scrollbar_instance_changed = 1; \
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0
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137 }
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138
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139 /* A device method. */
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140 /* #### The -1 check is such a hack. */
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141 static void
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142 x_update_scrollbar_instance_values (struct window *w,
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143 struct scrollbar_instance *inst,
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144 int new_line_increment,
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145 int new_page_increment,
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146 int new_minimum, int new_maximum,
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147 int new_slider_size,
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148 int new_slider_position,
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149 int new_scrollbar_width,
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150 int new_scrollbar_height,
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151 int new_scrollbar_x, int new_scrollbar_y)
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152 {
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153 UPDATE_DATA_FIELD (line_increment);
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154 UPDATE_DATA_FIELD (page_increment);
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155 UPDATE_DATA_FIELD (minimum);
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156 UPDATE_DATA_FIELD (maximum);
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157 UPDATE_DATA_FIELD (slider_size);
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158 UPDATE_DATA_FIELD (slider_position);
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159 UPDATE_DATA_FIELD (scrollbar_width);
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160 UPDATE_DATA_FIELD (scrollbar_height);
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161 UPDATE_DATA_FIELD (scrollbar_x);
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162 UPDATE_DATA_FIELD (scrollbar_y);
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163
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82
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164 /* This doesn't work with Athena, why? */
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0
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165 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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166 if (w && !vertical_drag_in_progress)
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167 {
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168 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
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169 int new_vows = marker_position (w->start[CURRENT_DISP]);
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170
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171 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
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172 {
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173 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
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174 inst->scrollbar_instance_changed = 1;
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175 }
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176 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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177 {
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178 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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179 inst->scrollbar_instance_changed = 1;
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180 }
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181 }
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182 #endif
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183 }
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184
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185 /* Used by x_update_scrollbar_instance_status. */
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186 static void
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187 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
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188 {
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189 Boolean use_backing_store;
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190
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272
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191 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
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0
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192
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193 if (use_backing_store && sb_widget)
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194 {
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195 unsigned long mask = CWBackingStore;
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196 XSetWindowAttributes attrs;
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185
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197
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0
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198 attrs.backing_store = Always;
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199 XChangeWindowAttributes (XtDisplay (sb_widget),
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200 XtWindow (sb_widget),
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201 mask,
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202 &attrs);
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203 }
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204 }
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205
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206 /* Create a widget value structure for passing down to lwlib so that
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207 it can update the scrollbar widgets. Used by
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208 x_update_scrollbar_instance_status. */
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209 static widget_value *
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210 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
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211 {
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212 widget_value *wv;
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213
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214 wv = xmalloc_widget_value ();
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215 /* #### maybe should add malloc_scrollbar_values to resource these? */
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185
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216 wv->scrollbar_data = xnew (scrollbar_values);
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0
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217
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218 wv->name = SCROLLBAR_X_NAME (instance);
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219 wv->value = 0;
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220 wv->key = 0;
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221 wv->enabled = instance->scrollbar_is_active;
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222 wv->selected = 0;
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223 wv->call_data = NULL;
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224
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225 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
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226
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227 wv->next = NULL;
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228
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229 return wv;
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230 }
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231
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232 /* Used by x_update_scrollbar_instance_status. */
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233 static void
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234 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
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235 {
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236 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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237 {
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185
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238 XDefineCursor (XtDisplay (wid), XtWindow (wid),
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0
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239 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
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240 XSync (XtDisplay (wid), False);
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241 }
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242 }
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243
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244 /* A device method. */
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245 static void
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246 x_update_scrollbar_instance_status (struct window *w, int active, int size,
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247 struct scrollbar_instance *instance)
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248 {
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249 struct frame *f = XFRAME (w->frame);
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102
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250 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
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0
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251
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252 if (active && size)
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253 {
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254 widget_value *wv = scrollbar_instance_to_widget_value (instance);
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255
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256 if (instance->scrollbar_instance_changed)
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257 {
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258 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
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259 instance->scrollbar_instance_changed = 0;
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260 }
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261
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262 if (!managed)
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263 {
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264 XtManageChild (SCROLLBAR_X_WIDGET (instance));
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265 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
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266 {
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267 /* Raise this window so that it's visible on top of the
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268 text window below it. */
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269 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
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270 XtWindow (SCROLLBAR_X_WIDGET (instance)));
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271 update_one_widget_scrollbar_pointer
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272 (w, SCROLLBAR_X_WIDGET (instance));
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273 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
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274 {
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275 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
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276 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
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277 }
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278 }
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279 }
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280
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281 if (!wv->scrollbar_data) abort ();
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282 xfree (wv->scrollbar_data);
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283 wv->scrollbar_data = 0;
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284 free_widget_value (wv);
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285 }
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286 else if (managed)
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287 {
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201
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288 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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289 /* This isn't needed with Athena Scrollbars. It might not be needed */
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290 /* with Motif scrollbars (it is apparently needed with Lesstif). */
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291 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
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292 #endif
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0
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293 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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294 }
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295 }
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296
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297 enum x_scrollbar_loop
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298 {
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299 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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300 X_SET_SCROLLBAR_POINTER,
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301 X_WINDOW_IS_SCROLLBAR,
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302 X_UPDATE_FRAME_SCROLLBARS
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303 };
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304
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305 static struct window_mirror *
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306 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
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307 struct window_mirror *mir,
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308 LWLIB_ID id, Window x_win)
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309 {
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310 struct window_mirror *retval = NULL;
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311
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312 while (mir)
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313 {
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314 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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272
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315 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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316 struct window *w = XWINDOW (window);
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0
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317
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318 if (mir->vchild)
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272
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319 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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0
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320 else if (mir->hchild)
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272
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321 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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322 if (retval)
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0
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323 return retval;
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324
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325 if (hinstance || vinstance)
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326 {
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327 switch (type)
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328 {
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329 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
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272
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330 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
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331 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
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332 return mir;
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0
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333 break;
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334 case X_UPDATE_FRAME_SCROLLBARS:
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335 if (!mir->vchild && !mir->hchild)
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272
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336 update_window_scrollbars (w, mir, 1, 0);
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0
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337 break;
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338 case X_SET_SCROLLBAR_POINTER:
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339 if (!mir->vchild && !mir->hchild)
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340 {
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272
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341 Widget widget;
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0
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342
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272
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343 widget = SCROLLBAR_X_WIDGET (hinstance);
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344 if (widget && XtIsManaged (widget))
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345 update_one_widget_scrollbar_pointer (w, widget);
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0
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346
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272
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347 widget = SCROLLBAR_X_WIDGET (vinstance);
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348 if (widget && XtIsManaged (widget))
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349 update_one_widget_scrollbar_pointer (w, widget);
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0
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350 }
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351 break;
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352 case X_WINDOW_IS_SCROLLBAR:
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353 if (!mir->vchild && !mir->hchild)
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354 {
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272
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355 Widget widget;
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0
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356
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272
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357 widget = SCROLLBAR_X_WIDGET (hinstance);
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358 if (widget && XtIsManaged (widget) &&
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359 XtWindow (widget) == x_win)
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360 return (struct window_mirror *) 1;
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0
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361
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272
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362 widget = SCROLLBAR_X_WIDGET (vinstance);
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363 if (widget && XtIsManaged (widget) &&
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364 XtWindow (widget) == x_win)
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365 return (struct window_mirror *) 1;
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0
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366 }
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367 break;
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368 default:
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369 abort ();
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370 }
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371 }
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372
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373 mir = mir->next;
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272
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374 window = w->next;
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0
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375 }
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376
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377 return NULL;
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378 }
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379
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380 /* Used by callbacks. */
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|
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381 static struct window_mirror *
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382 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
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383 {
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384 if (f->mirror_dirty)
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385 update_frame_window_mirror (f);
|
|
|
386 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
|
387 f->root_mirror, id, (Window) NULL);
|
|
|
388 }
|
|
|
389
|
|
|
390 /*
|
|
|
391 * This is the only callback provided for vertical scrollbars. It
|
|
|
392 * should be able to handle all of the scrollbar events in
|
|
|
393 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
394 * scroll_event (see lwlib.h). */
|
|
|
395 static void
|
|
|
396 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
397 XtPointer client_data)
|
|
|
398 {
|
|
|
399 /* This function can GC */
|
|
|
400 scroll_event *data = (scroll_event *) client_data;
|
|
|
401 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
402 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
288
|
403 Lisp_Object win, frame;
|
|
0
|
404 struct scrollbar_instance *instance;
|
|
|
405 struct window_mirror *mirror;
|
|
|
406
|
|
|
407 if (!f)
|
|
|
408 return;
|
|
|
409
|
|
|
410 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
411 win = real_window (mirror, 1);
|
|
|
412
|
|
|
413 if (NILP (win))
|
|
|
414 return;
|
|
|
415 instance = mirror->scrollbar_vertical_instance;
|
|
288
|
416 frame = WINDOW_FRAME (XWINDOW (win));
|
|
0
|
417
|
|
|
418 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
419 is called. #### Why??? */
|
|
|
420 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
421
|
|
|
422 switch (data->action)
|
|
|
423 {
|
|
|
424 case SCROLLBAR_LINE_UP:
|
|
288
|
425 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
|
|
0
|
426 break;
|
|
|
427
|
|
|
428 case SCROLLBAR_LINE_DOWN:
|
|
288
|
429 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
|
|
0
|
430 break;
|
|
|
431
|
|
|
432 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
433 Depending on where you click the size of the page varies.
|
|
|
434 Motif always does a standard Emacs page. */
|
|
|
435 case SCROLLBAR_PAGE_UP:
|
|
82
|
436 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
437 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
438 {
|
|
|
439 double tmp = ((double) data->slider_value /
|
|
|
440 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
441 double line = tmp *
|
|
|
442 (double) window_displayed_height (XWINDOW (win));
|
|
185
|
443
|
|
0
|
444 if (line > -1.0)
|
|
|
445 line = -1.0;
|
|
288
|
446 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
0
|
447 Fcons (win, make_int ((int) line)));
|
|
|
448 }
|
|
|
449 #else
|
|
288
|
450 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
0
|
451 Fcons (win, Qnil));
|
|
|
452 #endif
|
|
|
453 break;
|
|
|
454
|
|
|
455 case SCROLLBAR_PAGE_DOWN:
|
|
82
|
456 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
457 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
458 {
|
|
|
459 double tmp = ((double) data->slider_value /
|
|
|
460 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
461 double line = tmp *
|
|
|
462 (double) window_displayed_height (XWINDOW (win));
|
|
|
463
|
|
|
464 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
465 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
466 {
|
|
|
467 if (line < 1.0)
|
|
|
468 line = 1.0;
|
|
288
|
469 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
0
|
470 Fcons (win,
|
|
|
471 make_int ((int) line)));
|
|
|
472 }
|
|
|
473 }
|
|
|
474 #else
|
|
288
|
475 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
0
|
476 Fcons (win, Qnil));
|
|
|
477 #endif
|
|
|
478 break;
|
|
|
479
|
|
|
480 case SCROLLBAR_TOP:
|
|
288
|
481 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
|
|
0
|
482 break;
|
|
|
483
|
|
|
484 case SCROLLBAR_BOTTOM:
|
|
288
|
485 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
|
|
0
|
486 break;
|
|
|
487
|
|
|
488
|
|
|
489 case SCROLLBAR_CHANGE:
|
|
102
|
490 inhibit_slider_size_change = 0;
|
|
0
|
491 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
492 vertical_drag_in_progress = 0;
|
|
|
493 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
494 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
495 XINT (Fwindow_start (win));
|
|
84
|
496 #else
|
|
|
497 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
498 #endif
|
|
|
499 break;
|
|
|
500
|
|
|
501 case SCROLLBAR_DRAG:
|
|
|
502 {
|
|
|
503 int value;
|
|
|
504
|
|
102
|
505 inhibit_slider_size_change = 1;
|
|
0
|
506
|
|
|
507 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
508 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
509 want to avoid having the window position jump when you
|
|
|
510 first grab the scrollbar, but we also want to ensure that
|
|
|
511 you can scroll all the way to the top or bottom of the
|
|
|
512 buffer. This can all be replaced with something sane when
|
|
|
513 we get line-based scrolling. */
|
|
|
514
|
|
|
515 vertical_drag_in_progress = 1;
|
|
185
|
516
|
|
|
517 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
0
|
518 {
|
|
|
519 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
520 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
521 XINT (Fwindow_start (win));
|
|
|
522 }
|
|
|
523
|
|
|
524 /* Could replace this piecewise linear scrolling with a
|
|
|
525 quadratic through the three points, but I'm not sure that
|
|
|
526 would feel any nicer in practice. */
|
|
185
|
527 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
0
|
528 {
|
|
|
529 /* We've dragged up; slide linearly from original position to
|
|
|
530 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
531
|
|
|
532 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
185
|
533 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
0
|
534 {
|
|
|
535 /* shouldn't get here, but just in case */
|
|
|
536 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
537 }
|
|
|
538 else
|
|
|
539 {
|
|
272
|
540 value = (int)
|
|
|
541 (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
542 + (((double)
|
|
|
543 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
544 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
545 * (data->slider_value -
|
|
|
546 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
|
547 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
548 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
0
|
549 }
|
|
|
550 }
|
|
185
|
551 else
|
|
0
|
552 {
|
|
|
553 /* We've dragged down; slide linearly from original position to
|
|
|
554 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
555
|
|
185
|
556 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
0
|
557 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
558 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
559 {
|
|
|
560 /* avoid divide by zero */
|
|
|
561 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
185
|
562 }
|
|
|
563 else
|
|
0
|
564 {
|
|
272
|
565 value = (int)
|
|
|
566 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
567 + (((double)
|
|
|
568 (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
569 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
|
570 * (data->slider_value
|
|
|
571 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
|
572 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
573 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
574 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
0
|
575 }
|
|
|
576 }
|
|
|
577 #else
|
|
82
|
578 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
579 value = data->slider_value;
|
|
|
580 #endif
|
|
|
581
|
|
|
582 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
583 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
584 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
585 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
586
|
|
288
|
587 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
|
|
0
|
588 Fcons (win, make_int (value)));
|
|
|
589 }
|
|
|
590 break;
|
|
|
591
|
|
|
592 }
|
|
|
593 }
|
|
|
594
|
|
|
595 /*
|
|
|
596 * This is the only callback provided for horizontal scrollbars. It
|
|
|
597 * should be able to handle all of the scrollbar events in
|
|
|
598 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
599 * scroll_event (see lwlib.h). */
|
|
|
600 static void
|
|
|
601 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
602 XtPointer client_data)
|
|
|
603 {
|
|
|
604 scroll_event *data = (scroll_event *) client_data;
|
|
|
605 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
606 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
288
|
607 Lisp_Object win, frame;
|
|
0
|
608 struct window_mirror *mirror;
|
|
|
609
|
|
|
610 if (!f)
|
|
|
611 return;
|
|
|
612
|
|
|
613 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
614 win = real_window (mirror, 1);
|
|
|
615
|
|
|
616 if (NILP (win))
|
|
|
617 return;
|
|
288
|
618 frame = WINDOW_FRAME (XWINDOW (win));
|
|
0
|
619
|
|
|
620 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
621 is called. #### Why??? */
|
|
|
622 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
623
|
|
|
624 switch (data->action)
|
|
|
625 {
|
|
|
626 case SCROLLBAR_LINE_UP:
|
|
288
|
627 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
|
|
0
|
628 break;
|
|
|
629 case SCROLLBAR_LINE_DOWN:
|
|
288
|
630 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
|
|
0
|
631 break;
|
|
|
632 case SCROLLBAR_PAGE_UP:
|
|
288
|
633 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
|
|
0
|
634 break;
|
|
|
635 case SCROLLBAR_PAGE_DOWN:
|
|
288
|
636 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
|
|
0
|
637 break;
|
|
|
638 case SCROLLBAR_TOP:
|
|
288
|
639 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
|
|
0
|
640 break;
|
|
|
641 case SCROLLBAR_BOTTOM:
|
|
288
|
642 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
|
|
0
|
643 break;
|
|
|
644 case SCROLLBAR_CHANGE:
|
|
102
|
645 inhibit_slider_size_change = 0;
|
|
0
|
646 break;
|
|
|
647 case SCROLLBAR_DRAG:
|
|
102
|
648 inhibit_slider_size_change = 1;
|
|
0
|
649 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
650 Lucid is the one mostly wrong.*/
|
|
82
|
651 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
288
|
652 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
0
|
653 (Fcons
|
|
|
654 (win, make_int (data->slider_value))));
|
|
|
655 #else
|
|
288
|
656 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
0
|
657 (Fcons
|
|
|
658 (win,
|
|
|
659 make_int (data->slider_value - 1))));
|
|
|
660 #endif
|
|
|
661 break;
|
|
|
662 default:
|
|
|
663 break;
|
|
|
664 }
|
|
|
665 }
|
|
|
666
|
|
|
667 static void
|
|
|
668 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
669 {
|
|
272
|
670 Lisp_Object window;
|
|
0
|
671
|
|
|
672 XSETWINDOW (window, w);
|
|
|
673 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
|
674 0, (Window) NULL);
|
|
|
675 }
|
|
|
676
|
|
|
677 /* Called directly from x_any_window_to_frame in frame-x.c */
|
|
|
678 EMACS_INT
|
|
|
679 x_window_is_scrollbar (struct frame *f, Window win)
|
|
|
680 {
|
|
|
681 if (!FRAME_X_P (f))
|
|
|
682 return 0;
|
|
|
683
|
|
|
684 if (f->mirror_dirty)
|
|
|
685 update_frame_window_mirror (f);
|
|
|
686 return (EMACS_INT) x_scrollbar_loop (X_WINDOW_IS_SCROLLBAR, f->root_window,
|
|
|
687 f->root_mirror, 0, win);
|
|
|
688 }
|
|
|
689
|
|
|
690 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
691 directly from x_set_frame_properties in frame-x.c*/
|
|
|
692 void
|
|
|
693 x_update_frame_scrollbars (struct frame *f)
|
|
|
694 {
|
|
|
695 /* Consider this code to be "in_display" so that we abort() if Fsignal()
|
|
|
696 gets called. */
|
|
|
697 in_display++;
|
|
|
698 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window, f->root_mirror,
|
|
|
699 0, (Window) NULL);
|
|
|
700 in_display--;
|
|
|
701 if (in_display < 0) abort ();
|
|
|
702 }
|
|
|
703
|
|
|
704 #ifdef MEMORY_USAGE_STATS
|
|
|
705
|
|
|
706 static int
|
|
|
707 x_compute_scrollbar_instance_usage (struct device *d,
|
|
|
708 struct scrollbar_instance *inst,
|
|
|
709 struct overhead_stats *ovstats)
|
|
|
710 {
|
|
|
711 int total = 0;
|
|
|
712
|
|
|
713 while (inst)
|
|
|
714 {
|
|
|
715 struct x_scrollbar_data *data =
|
|
|
716 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
|
717
|
|
|
718 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
719 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
|
720 ovstats);
|
|
|
721 inst = inst->next;
|
|
|
722 }
|
|
|
723
|
|
|
724 return total;
|
|
|
725 }
|
|
|
726
|
|
|
727 #endif /* MEMORY_USAGE_STATS */
|
|
|
728
|
|
|
729
|
|
|
730 /************************************************************************/
|
|
|
731 /* initialization */
|
|
|
732 /************************************************************************/
|
|
|
733
|
|
|
734 void
|
|
|
735 console_type_create_scrollbar_x (void)
|
|
|
736 {
|
|
102
|
737 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
0
|
738 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
|
739 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
|
740 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
|
741 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
742 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
|
743 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
744 #ifdef MEMORY_USAGE_STATS
|
|
|
745 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
746 #endif /* MEMORY_USAGE_STATS */
|
|
|
747 }
|
|
|
748
|
|
|
749 void
|
|
|
750 vars_of_scrollbar_x (void)
|
|
|
751 {
|
|
|
752 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
753 Fprovide (intern ("lucid-scrollbars"));
|
|
|
754 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
755 Fprovide (intern ("motif-scrollbars"));
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|
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756 #elif defined (LWLIB_SCROLLBARS_ATHENA)
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757 Fprovide (intern ("athena-scrollbars"));
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|
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758 #endif
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86
|
759 stupid_vertical_scrollbar_drag_hack = 1;
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0
|
760 }
|
