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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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165
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190 Arg al [1];
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0
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191
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165
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192 XtSetArg (al [0], XtNuseBackingStore, &use_backing_store);
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193 XtGetValues (FRAME_X_TEXT_WIDGET (f), al, 1);
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0
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194
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195 if (use_backing_store && sb_widget)
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196 {
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197 unsigned long mask = CWBackingStore;
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198 XSetWindowAttributes attrs;
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185
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199
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0
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200 attrs.backing_store = Always;
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201 XChangeWindowAttributes (XtDisplay (sb_widget),
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202 XtWindow (sb_widget),
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203 mask,
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204 &attrs);
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205 }
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206 }
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207
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208 /* Create a widget value structure for passing down to lwlib so that
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209 it can update the scrollbar widgets. Used by
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210 x_update_scrollbar_instance_status. */
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211 static widget_value *
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212 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
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213 {
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214 widget_value *wv;
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215
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216 wv = xmalloc_widget_value ();
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217 /* #### maybe should add malloc_scrollbar_values to resource these? */
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185
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218 wv->scrollbar_data = xnew (scrollbar_values);
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0
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219
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220 wv->name = SCROLLBAR_X_NAME (instance);
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221 wv->value = 0;
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222 wv->key = 0;
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223 wv->enabled = instance->scrollbar_is_active;
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224 wv->selected = 0;
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225 wv->call_data = NULL;
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226
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227 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
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228
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229 wv->next = NULL;
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230
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231 return wv;
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232 }
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233
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234 /* Used by x_update_scrollbar_instance_status. */
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235 static void
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236 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
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237 {
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238 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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239 {
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185
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240 XDefineCursor (XtDisplay (wid), XtWindow (wid),
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0
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241 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
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242 XSync (XtDisplay (wid), False);
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243 }
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244 }
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245
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246 /* A device method. */
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247 static void
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248 x_update_scrollbar_instance_status (struct window *w, int active, int size,
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249 struct scrollbar_instance *instance)
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250 {
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251 struct frame *f = XFRAME (w->frame);
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102
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252 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
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0
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253
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254 if (active && size)
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255 {
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256 widget_value *wv = scrollbar_instance_to_widget_value (instance);
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257
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258 if (instance->scrollbar_instance_changed)
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259 {
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260 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
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261 instance->scrollbar_instance_changed = 0;
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262 }
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263
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264 if (!managed)
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265 {
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266 XtManageChild (SCROLLBAR_X_WIDGET (instance));
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267 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
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268 {
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269 /* Raise this window so that it's visible on top of the
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270 text window below it. */
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271 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
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272 XtWindow (SCROLLBAR_X_WIDGET (instance)));
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273 update_one_widget_scrollbar_pointer
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274 (w, SCROLLBAR_X_WIDGET (instance));
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275 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
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276 {
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277 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
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278 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
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279 }
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280 }
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281 }
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282
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283 if (!wv->scrollbar_data) abort ();
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284 xfree (wv->scrollbar_data);
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285 wv->scrollbar_data = 0;
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286 free_widget_value (wv);
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287 }
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288 else if (managed)
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289 {
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290 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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291 }
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292 }
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293
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294 /* A device method. */
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295 static void
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296 x_scrollbar_width_changed_in_frame (Lisp_Object specifier, struct frame *f,
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297 Lisp_Object oldval)
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298 {
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299 XtWidgetGeometry req, repl;
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300 Lisp_Object newval = f->scrollbar_width;
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301
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302 in_specifier_change_function++;
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303
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304 /* We want the text area to stay the same size. So, we query the
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305 current size and then adjust it for the change in the scrollbar
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306 width. */
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307
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308 /* mirror the value in the frame resources, unless it was already
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309 done. */
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310 if (!in_resource_setting)
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165
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311 {
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312 Arg al [1];
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313 XtSetArg (al [0], XtNscrollBarWidth, XINT (newval));
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314 XtSetValues (FRAME_X_TEXT_WIDGET (f), al, 1);
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315 }
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0
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316
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317 if (XtIsRealized (FRAME_X_CONTAINER_WIDGET (f)))
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318 {
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319 req.request_mode = 0;
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320
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321 /* the query-geometry method looks at the current value of
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322 f->scrollbar_width, so temporarily set it back to the old
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323 one. */
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324 f->scrollbar_width = oldval;
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325 XtQueryGeometry (FRAME_X_CONTAINER_WIDGET (f), &req, &repl);
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326 f->scrollbar_width = newval;
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185
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327
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0
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328 repl.width += XINT (newval) - XINT (oldval);
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329 EmacsManagerChangeSize (FRAME_X_CONTAINER_WIDGET (f), repl.width,
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330 repl.height);
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331 }
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332
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333 in_specifier_change_function--;
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334 }
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335
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336 /* A device method. */
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337 static void
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338 x_scrollbar_height_changed_in_frame (Lisp_Object specifier, struct frame *f,
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339 Lisp_Object oldval)
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340 {
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341 XtWidgetGeometry req, repl;
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342 Lisp_Object newval = f->scrollbar_height;
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343
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344 in_specifier_change_function++;
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345
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346 /* We want the text area to stay the same size. So, we query the
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347 current size and then adjust it for the change in the scrollbar
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348 height. */
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349
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350 /* mirror the value in the frame resources, unless it was already
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351 done. Also don't do it if this is the when the frame is being
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352 created -- the widgets don't even exist yet, and even if they
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353 did, we wouldn't want to overwrite the resource information
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354 (which might specify a user preference). */
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355 if (!in_resource_setting)
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165
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356 {
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357 Arg al [1];
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358 XtSetArg (al [0], XtNscrollBarHeight, XINT (newval));
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359 XtSetValues (FRAME_X_TEXT_WIDGET (f), al, 1);
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360 }
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0
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361
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362 if (XtIsRealized (FRAME_X_CONTAINER_WIDGET (f)))
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363 {
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364 req.request_mode = 0;
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365
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366 /* the query-geometry method looks at the current value of
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367 f->scrollbar_height, so temporarily set it back to the old
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368 one. */
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369 f->scrollbar_height = oldval;
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370 XtQueryGeometry (FRAME_X_CONTAINER_WIDGET (f), &req, &repl);
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371 f->scrollbar_height = newval;
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185
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372
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0
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373 repl.height += XINT (newval) - XINT (oldval);
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374 EmacsManagerChangeSize (FRAME_X_CONTAINER_WIDGET (f), repl.width,
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375 repl.height);
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376 }
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377
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378 in_specifier_change_function--;
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379 }
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380
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381 enum x_scrollbar_loop
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382 {
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383 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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384 X_SET_SCROLLBAR_POINTER,
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385 X_WINDOW_IS_SCROLLBAR,
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386 X_UPDATE_FRAME_SCROLLBARS
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387 };
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|
388
|
|
|
389 static struct window_mirror *
|
|
|
390 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
|
|
|
391 struct window_mirror *mir,
|
|
|
392 LWLIB_ID id, Window x_win)
|
|
|
393 {
|
|
|
394 struct window_mirror *retval = NULL;
|
|
|
395
|
|
|
396 while (mir)
|
|
|
397 {
|
|
|
398 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
|
|
|
399 struct scrollbar_instance *hinstance =
|
|
|
400 mir->scrollbar_horizontal_instance;
|
|
|
401 struct frame *f;
|
|
|
402
|
|
|
403 assert (!NILP (window));
|
|
|
404 f = XFRAME (XWINDOW (window)->frame);
|
|
|
405
|
|
|
406 if (mir->vchild)
|
|
|
407 {
|
|
|
408 retval = x_scrollbar_loop (type, XWINDOW (window)->vchild,
|
|
|
409 mir->vchild, id, x_win);
|
|
|
410 }
|
|
|
411 else if (mir->hchild)
|
|
|
412 {
|
|
|
413 retval = x_scrollbar_loop (type, XWINDOW (window)->hchild,
|
|
|
414 mir->hchild, id, x_win);
|
|
|
415 }
|
|
|
416
|
|
|
417 if (retval != NULL)
|
|
|
418 return retval;
|
|
|
419
|
|
|
420 if (hinstance || vinstance)
|
|
|
421 {
|
|
|
422 switch (type)
|
|
|
423 {
|
|
|
424 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
|
|
|
425 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id)
|
|
|
426 || (hinstance && SCROLLBAR_X_ID (hinstance) == id))
|
|
|
427 {
|
|
|
428 return mir;
|
|
|
429 }
|
|
|
430 break;
|
|
|
431 case X_UPDATE_FRAME_SCROLLBARS:
|
|
|
432 if (!mir->vchild && !mir->hchild)
|
|
|
433 update_window_scrollbars (XWINDOW (window), mir, 1, 0);
|
|
|
434 break;
|
|
|
435 case X_SET_SCROLLBAR_POINTER:
|
|
|
436 if (!mir->vchild && !mir->hchild)
|
|
|
437 {
|
|
|
438 int loop;
|
|
|
439
|
|
|
440 for (loop = 0; loop < 2; loop++)
|
|
|
441 {
|
|
|
442 Widget widget;
|
|
|
443
|
|
|
444 if (loop)
|
|
|
445 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
|
446 else
|
|
|
447 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
|
448
|
|
|
449 if (widget && XtIsManaged (widget))
|
|
|
450 {
|
|
|
451 update_one_widget_scrollbar_pointer
|
|
|
452 (XWINDOW (window), widget);
|
|
|
453 }
|
|
|
454 }
|
|
|
455 }
|
|
|
456 break;
|
|
|
457 case X_WINDOW_IS_SCROLLBAR:
|
|
|
458 if (!mir->vchild && !mir->hchild)
|
|
|
459 {
|
|
|
460 int loop;
|
|
|
461
|
|
|
462 for (loop = 0; loop < 2; loop++)
|
|
|
463 {
|
|
|
464 Widget widget;
|
|
|
465
|
|
|
466 if (loop)
|
|
|
467 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
|
468 else
|
|
|
469 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
|
470
|
|
|
471 if (widget && XtIsManaged (widget))
|
|
|
472 {
|
|
|
473 if (XtWindow (widget) == x_win)
|
|
|
474 return (struct window_mirror *) 1;
|
|
|
475 }
|
|
|
476 }
|
|
|
477 }
|
|
|
478 break;
|
|
|
479 default:
|
|
|
480 abort ();
|
|
|
481 }
|
|
|
482 }
|
|
|
483
|
|
|
484 mir = mir->next;
|
|
|
485 window = XWINDOW (window)->next;
|
|
|
486 }
|
|
|
487
|
|
|
488 return NULL;
|
|
|
489 }
|
|
|
490
|
|
|
491 /* Used by callbacks. */
|
|
|
492 static struct window_mirror *
|
|
|
493 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
|
|
|
494 {
|
|
|
495 if (f->mirror_dirty)
|
|
|
496 update_frame_window_mirror (f);
|
|
|
497 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
|
498 f->root_mirror, id, (Window) NULL);
|
|
|
499 }
|
|
|
500
|
|
|
501 /*
|
|
|
502 * This is the only callback provided for vertical scrollbars. It
|
|
|
503 * should be able to handle all of the scrollbar events in
|
|
|
504 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
505 * scroll_event (see lwlib.h). */
|
|
|
506 static void
|
|
|
507 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
508 XtPointer client_data)
|
|
|
509 {
|
|
|
510 /* This function can GC */
|
|
|
511 scroll_event *data = (scroll_event *) client_data;
|
|
|
512 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
513 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
514 Lisp_Object win;
|
|
|
515 struct scrollbar_instance *instance;
|
|
|
516 struct window_mirror *mirror;
|
|
|
517
|
|
|
518 if (!f)
|
|
|
519 return;
|
|
|
520
|
|
|
521 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
522 win = real_window (mirror, 1);
|
|
|
523
|
|
|
524 if (NILP (win))
|
|
|
525 return;
|
|
|
526 instance = mirror->scrollbar_vertical_instance;
|
|
|
527
|
|
|
528 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
529 is called. #### Why??? */
|
|
|
530 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
531
|
|
|
532 switch (data->action)
|
|
|
533 {
|
|
|
534 case SCROLLBAR_LINE_UP:
|
|
|
535 signal_special_Xt_user_event (win, Qscrollbar_line_up, win);
|
|
|
536 break;
|
|
|
537
|
|
|
538 case SCROLLBAR_LINE_DOWN:
|
|
|
539 signal_special_Xt_user_event (win, Qscrollbar_line_down, win);
|
|
|
540 break;
|
|
|
541
|
|
|
542 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
543 Depending on where you click the size of the page varies.
|
|
|
544 Motif always does a standard Emacs page. */
|
|
|
545 case SCROLLBAR_PAGE_UP:
|
|
82
|
546 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
547 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
548 {
|
|
|
549 double tmp = ((double) data->slider_value /
|
|
|
550 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
551 double line = tmp *
|
|
|
552 (double) window_displayed_height (XWINDOW (win));
|
|
185
|
553
|
|
0
|
554 if (line > -1.0)
|
|
|
555 line = -1.0;
|
|
|
556 signal_special_Xt_user_event (win, Qscrollbar_page_up,
|
|
|
557 Fcons (win, make_int ((int) line)));
|
|
|
558 }
|
|
|
559 #else
|
|
|
560 signal_special_Xt_user_event (win, Qscrollbar_page_up,
|
|
|
561 Fcons (win, Qnil));
|
|
|
562 #endif
|
|
|
563 break;
|
|
|
564
|
|
|
565 case SCROLLBAR_PAGE_DOWN:
|
|
82
|
566 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
567 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
568 {
|
|
|
569 double tmp = ((double) data->slider_value /
|
|
|
570 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
571 double line = tmp *
|
|
|
572 (double) window_displayed_height (XWINDOW (win));
|
|
|
573
|
|
|
574 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
575 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
576 {
|
|
|
577 if (line < 1.0)
|
|
|
578 line = 1.0;
|
|
|
579 signal_special_Xt_user_event (win, Qscrollbar_page_down,
|
|
|
580 Fcons (win,
|
|
|
581 make_int ((int) line)));
|
|
|
582 }
|
|
|
583 }
|
|
|
584 #else
|
|
|
585 signal_special_Xt_user_event (win, Qscrollbar_page_down,
|
|
|
586 Fcons (win, Qnil));
|
|
|
587 #endif
|
|
|
588 break;
|
|
|
589
|
|
|
590 case SCROLLBAR_TOP:
|
|
|
591 signal_special_Xt_user_event (win, Qscrollbar_to_top, win);
|
|
|
592 break;
|
|
|
593
|
|
|
594 case SCROLLBAR_BOTTOM:
|
|
|
595 signal_special_Xt_user_event (win, Qscrollbar_to_bottom, win);
|
|
|
596 break;
|
|
|
597
|
|
|
598
|
|
|
599 case SCROLLBAR_CHANGE:
|
|
102
|
600 inhibit_slider_size_change = 0;
|
|
0
|
601 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
602 vertical_drag_in_progress = 0;
|
|
|
603 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
604 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
605 XINT (Fwindow_start (win));
|
|
84
|
606 #else
|
|
|
607 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
608 #endif
|
|
|
609 break;
|
|
|
610
|
|
|
611 case SCROLLBAR_DRAG:
|
|
|
612 {
|
|
|
613 int value;
|
|
|
614
|
|
102
|
615 inhibit_slider_size_change = 1;
|
|
0
|
616
|
|
|
617 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
618 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
619 want to avoid having the window position jump when you
|
|
|
620 first grab the scrollbar, but we also want to ensure that
|
|
|
621 you can scroll all the way to the top or bottom of the
|
|
|
622 buffer. This can all be replaced with something sane when
|
|
|
623 we get line-based scrolling. */
|
|
|
624
|
|
|
625 vertical_drag_in_progress = 1;
|
|
185
|
626
|
|
|
627 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
0
|
628 {
|
|
|
629 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
630 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
631 XINT (Fwindow_start (win));
|
|
|
632 }
|
|
|
633
|
|
|
634 /* Could replace this piecewise linear scrolling with a
|
|
|
635 quadratic through the three points, but I'm not sure that
|
|
|
636 would feel any nicer in practice. */
|
|
185
|
637 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
0
|
638 {
|
|
|
639 /* We've dragged up; slide linearly from original position to
|
|
|
640 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
641
|
|
|
642 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
185
|
643 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
0
|
644 {
|
|
|
645 /* shouldn't get here, but just in case */
|
|
|
646 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
647 }
|
|
|
648 else
|
|
|
649 {
|
|
|
650 value = (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
651 + (((double)
|
|
185
|
652 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
0
|
653 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
654 * (data->slider_value -
|
|
185
|
655 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
0
|
656 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
657 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
|
658 }
|
|
|
659 }
|
|
185
|
660 else
|
|
0
|
661 {
|
|
|
662 /* We've dragged down; slide linearly from original position to
|
|
|
663 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
664
|
|
185
|
665 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
0
|
666 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
667 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
668 {
|
|
|
669 /* avoid divide by zero */
|
|
|
670 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
185
|
671 }
|
|
|
672 else
|
|
0
|
673 {
|
|
|
674 value = (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
675 + (((double) (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
676 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
185
|
677 * (data->slider_value
|
|
|
678 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
0
|
679 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
680 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
681 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
|
682 }
|
|
|
683 }
|
|
|
684 #else
|
|
82
|
685 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
686 value = data->slider_value;
|
|
|
687 #endif
|
|
|
688
|
|
|
689 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
690 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
691 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
692 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
693
|
|
|
694 signal_special_Xt_user_event (win, Qscrollbar_vertical_drag,
|
|
|
695 Fcons (win, make_int (value)));
|
|
|
696 }
|
|
|
697 break;
|
|
|
698
|
|
|
699 }
|
|
|
700 }
|
|
|
701
|
|
|
702 /*
|
|
|
703 * This is the only callback provided for horizontal scrollbars. It
|
|
|
704 * should be able to handle all of the scrollbar events in
|
|
|
705 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
706 * scroll_event (see lwlib.h). */
|
|
|
707 static void
|
|
|
708 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
709 XtPointer client_data)
|
|
|
710 {
|
|
|
711 scroll_event *data = (scroll_event *) client_data;
|
|
|
712 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
713 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
714 Lisp_Object win;
|
|
|
715 struct window_mirror *mirror;
|
|
|
716
|
|
|
717 if (!f)
|
|
|
718 return;
|
|
|
719
|
|
|
720 mirror = find_scrollbar_window_mirror (f, id);
|
|
|
721 win = real_window (mirror, 1);
|
|
|
722
|
|
|
723 if (NILP (win))
|
|
|
724 return;
|
|
|
725
|
|
|
726 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
727 is called. #### Why??? */
|
|
|
728 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
729
|
|
|
730 switch (data->action)
|
|
|
731 {
|
|
|
732 case SCROLLBAR_LINE_UP:
|
|
|
733 signal_special_Xt_user_event (win, Qscrollbar_char_left, win);
|
|
|
734 break;
|
|
|
735 case SCROLLBAR_LINE_DOWN:
|
|
|
736 signal_special_Xt_user_event (win, Qscrollbar_char_right, win);
|
|
|
737 break;
|
|
|
738 case SCROLLBAR_PAGE_UP:
|
|
|
739 signal_special_Xt_user_event (win, Qscrollbar_page_left, win);
|
|
|
740 break;
|
|
|
741 case SCROLLBAR_PAGE_DOWN:
|
|
|
742 signal_special_Xt_user_event (win, Qscrollbar_page_right, win);
|
|
|
743 break;
|
|
|
744 case SCROLLBAR_TOP:
|
|
|
745 signal_special_Xt_user_event (win, Qscrollbar_to_left, win);
|
|
|
746 break;
|
|
|
747 case SCROLLBAR_BOTTOM:
|
|
|
748 signal_special_Xt_user_event (win, Qscrollbar_to_right, win);
|
|
|
749 break;
|
|
|
750 case SCROLLBAR_CHANGE:
|
|
102
|
751 inhibit_slider_size_change = 0;
|
|
0
|
752 break;
|
|
|
753 case SCROLLBAR_DRAG:
|
|
102
|
754 inhibit_slider_size_change = 1;
|
|
0
|
755 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
756 Lucid is the one mostly wrong.*/
|
|
82
|
757 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
758 signal_special_Xt_user_event (win, Qscrollbar_horizontal_drag,
|
|
|
759 (Fcons
|
|
|
760 (win, make_int (data->slider_value))));
|
|
|
761 #else
|
|
|
762 signal_special_Xt_user_event (win, Qscrollbar_horizontal_drag,
|
|
|
763 (Fcons
|
|
|
764 (win,
|
|
|
765 make_int (data->slider_value - 1))));
|
|
|
766 #endif
|
|
|
767 break;
|
|
|
768 default:
|
|
|
769 break;
|
|
|
770 }
|
|
|
771 }
|
|
|
772
|
|
|
773 static void
|
|
|
774 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
775 {
|
|
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776 Lisp_Object window = Qnil;
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777
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778 XSETWINDOW (window, w);
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779 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
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|
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780 0, (Window) NULL);
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781 }
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782
|
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|
783 /* Called directly from x_any_window_to_frame in frame-x.c */
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|
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784 EMACS_INT
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|
|
785 x_window_is_scrollbar (struct frame *f, Window win)
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|
|
786 {
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|
787 if (!FRAME_X_P (f))
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|
|
788 return 0;
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|
|
789
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790 if (f->mirror_dirty)
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791 update_frame_window_mirror (f);
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|
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792 return (EMACS_INT) x_scrollbar_loop (X_WINDOW_IS_SCROLLBAR, f->root_window,
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|
|
793 f->root_mirror, 0, win);
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|
|
794 }
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|
|
795
|
|
|
796 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
797 directly from x_set_frame_properties in frame-x.c*/
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|
|
798 void
|
|
|
799 x_update_frame_scrollbars (struct frame *f)
|
|
|
800 {
|
|
|
801 /* Consider this code to be "in_display" so that we abort() if Fsignal()
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|
|
802 gets called. */
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|
|
803 in_display++;
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|
|
804 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window, f->root_mirror,
|
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805 0, (Window) NULL);
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|
806 in_display--;
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807 if (in_display < 0) abort ();
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|
808 }
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809
|
|
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810 #ifdef MEMORY_USAGE_STATS
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|
|
811
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|
|
812 static int
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|
|
813 x_compute_scrollbar_instance_usage (struct device *d,
|
|
|
814 struct scrollbar_instance *inst,
|
|
|
815 struct overhead_stats *ovstats)
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|
|
816 {
|
|
|
817 int total = 0;
|
|
|
818
|
|
|
819 while (inst)
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|
|
820 {
|
|
|
821 struct x_scrollbar_data *data =
|
|
|
822 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
|
823
|
|
|
824 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
825 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
|
826 ovstats);
|
|
|
827 inst = inst->next;
|
|
|
828 }
|
|
|
829
|
|
|
830 return total;
|
|
|
831 }
|
|
|
832
|
|
|
833 #endif /* MEMORY_USAGE_STATS */
|
|
|
834
|
|
|
835
|
|
|
836 /************************************************************************/
|
|
|
837 /* initialization */
|
|
|
838 /************************************************************************/
|
|
|
839
|
|
|
840 void
|
|
|
841 console_type_create_scrollbar_x (void)
|
|
|
842 {
|
|
102
|
843 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
0
|
844 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
|
845 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
|
846 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
|
847 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
848 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
|
849 CONSOLE_HAS_METHOD (x, scrollbar_width_changed_in_frame);
|
|
|
850 CONSOLE_HAS_METHOD (x, scrollbar_height_changed_in_frame);
|
|
|
851 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
852 #ifdef MEMORY_USAGE_STATS
|
|
|
853 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
854 #endif /* MEMORY_USAGE_STATS */
|
|
|
855 }
|
|
|
856
|
|
|
857 void
|
|
|
858 vars_of_scrollbar_x (void)
|
|
|
859 {
|
|
|
860 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
861 Fprovide (intern ("lucid-scrollbars"));
|
|
|
862 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
863 Fprovide (intern ("motif-scrollbars"));
|
|
|
864 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
|
865 Fprovide (intern ("athena-scrollbars"));
|
|
|
866 #endif
|
|
86
|
867 stupid_vertical_scrollbar_drag_hack = 1;
|
|
0
|
868 }
|
