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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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380
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3 Copyright (C) 1994 Amdahl Corporation.
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0
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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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398
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30 #include "EmacsFrame.h"
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0
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31 #include "glyphs-x.h"
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32 #include "gui-x.h"
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33 #include "scrollbar-x.h"
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34
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35 #include "frame.h"
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36 #include "window.h"
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37
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38 static void x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
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39 XtPointer client_data);
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40 static void x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
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41 XtPointer client_data);
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42
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102
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43 /* Used to prevent changing the size of the slider while drag
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0
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44 scrolling, under Motif. This is necessary because the Motif
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102
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45 scrollbar is incredibly stupid about updating the slider and causes
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0
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46 lots of flicker if it is done too often. */
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102
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47 static int inhibit_slider_size_change;
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86
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48 int stupid_vertical_scrollbar_drag_hack;
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0
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49
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82
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50 /* Doesn't work with athena */
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0
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51 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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52 static int vertical_drag_in_progress;
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53 #endif
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54
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55
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56 /* A device method. */
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57 static int
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102
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58 x_inhibit_scrollbar_slider_size_change (void)
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0
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59 {
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84
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60 /* Doesn't work with Athena */
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0
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61 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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102
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62 return inhibit_slider_size_change;
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0
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63 #else
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64 return 0;
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65 #endif
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66 }
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67
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68 /* A device method. */
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69 static void
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70 x_free_scrollbar_instance (struct scrollbar_instance *instance)
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71 {
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72 if (SCROLLBAR_X_NAME (instance))
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73 xfree (SCROLLBAR_X_NAME (instance));
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74
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75 if (SCROLLBAR_X_WIDGET (instance))
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76 {
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77 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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78 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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79
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80 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
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81 }
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82
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83 if (instance->scrollbar_data)
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84 xfree (instance->scrollbar_data);
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85 }
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86
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87 /* A device method. */
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88 static void
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89 x_release_scrollbar_instance (struct scrollbar_instance *instance)
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90 {
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91 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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92 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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93 }
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94
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95 /* A device method. */
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96 static void
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97 x_create_scrollbar_instance (struct frame *f, int vertical,
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98 struct scrollbar_instance *instance)
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99 {
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100 char buffer[32];
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101
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102 /* initialize the X specific data section. */
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185
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103 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
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0
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104
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105 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
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106 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
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107 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
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82
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108 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
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109 defined (LWLIB_SCROLLBARS_ATHENA3D)
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0
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110 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
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111 #endif
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112
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113 if (vertical)
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114 {
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115 SCROLLBAR_X_WIDGET (instance) =
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116 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
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117 SCROLLBAR_X_ID (instance),
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118 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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119 x_update_vertical_scrollbar_callback, NULL, NULL);
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120 }
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121 else
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122 {
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123 SCROLLBAR_X_WIDGET (instance) =
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124 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
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125 SCROLLBAR_X_ID (instance),
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126 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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127 x_update_horizontal_scrollbar_callback, NULL, NULL);
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128 }
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129 }
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130
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102
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131 #define UPDATE_DATA_FIELD(field) \
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132 if (new_##field >= 0 && \
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133 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
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134 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
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135 inst->scrollbar_instance_changed = 1; \
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0
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136 }
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137
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138 /* A device method. */
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139 /* #### The -1 check is such a hack. */
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140 static void
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141 x_update_scrollbar_instance_values (struct window *w,
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142 struct scrollbar_instance *inst,
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143 int new_line_increment,
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144 int new_page_increment,
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145 int new_minimum, int new_maximum,
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146 int new_slider_size,
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147 int new_slider_position,
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148 int new_scrollbar_width,
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149 int new_scrollbar_height,
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150 int new_scrollbar_x, int new_scrollbar_y)
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151 {
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152 UPDATE_DATA_FIELD (line_increment);
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153 UPDATE_DATA_FIELD (page_increment);
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154 UPDATE_DATA_FIELD (minimum);
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155 UPDATE_DATA_FIELD (maximum);
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156 UPDATE_DATA_FIELD (slider_size);
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157 UPDATE_DATA_FIELD (slider_position);
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158 UPDATE_DATA_FIELD (scrollbar_width);
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159 UPDATE_DATA_FIELD (scrollbar_height);
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160 UPDATE_DATA_FIELD (scrollbar_x);
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161 UPDATE_DATA_FIELD (scrollbar_y);
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162
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82
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163 /* This doesn't work with Athena, why? */
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0
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164 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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165 if (w && !vertical_drag_in_progress)
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166 {
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167 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
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168 int new_vows = marker_position (w->start[CURRENT_DISP]);
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169
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170 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
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171 {
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172 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
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173 inst->scrollbar_instance_changed = 1;
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174 }
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175 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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176 {
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177 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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178 inst->scrollbar_instance_changed = 1;
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179 }
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180 }
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181 #endif
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182 }
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183
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184 /* Used by x_update_scrollbar_instance_status. */
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185 static void
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186 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
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187 {
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188 Boolean use_backing_store;
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189
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272
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190 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
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0
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191
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192 if (use_backing_store && sb_widget)
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193 {
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194 unsigned long mask = CWBackingStore;
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195 XSetWindowAttributes attrs;
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185
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196
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0
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197 attrs.backing_store = Always;
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198 XChangeWindowAttributes (XtDisplay (sb_widget),
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199 XtWindow (sb_widget),
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200 mask,
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201 &attrs);
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202 }
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203 }
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204
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205 /* Create a widget value structure for passing down to lwlib so that
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206 it can update the scrollbar widgets. Used by
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207 x_update_scrollbar_instance_status. */
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208 static widget_value *
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209 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
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210 {
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211 widget_value *wv;
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212
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213 wv = xmalloc_widget_value ();
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214 /* #### maybe should add malloc_scrollbar_values to resource these? */
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185
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215 wv->scrollbar_data = xnew (scrollbar_values);
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0
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216
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217 wv->name = SCROLLBAR_X_NAME (instance);
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398
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218 wv->name = xstrdup (wv->name);
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0
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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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398
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282 free_widget_value_tree (wv);
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0
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283 }
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284 else if (managed)
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285 {
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201
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286 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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287 /* This isn't needed with Athena Scrollbars. It might not be needed */
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288 /* with Motif scrollbars (it is apparently needed with Lesstif). */
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289 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
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290 #endif
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0
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291 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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292 }
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293 }
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294
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295 enum x_scrollbar_loop
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296 {
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297 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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298 X_SET_SCROLLBAR_POINTER,
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299 X_WINDOW_IS_SCROLLBAR,
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300 X_UPDATE_FRAME_SCROLLBARS
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301 };
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302
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303 static struct window_mirror *
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304 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
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305 struct window_mirror *mir,
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306 LWLIB_ID id, Window x_win)
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307 {
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308 struct window_mirror *retval = NULL;
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309
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310 while (mir)
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311 {
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312 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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272
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313 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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314 struct window *w = XWINDOW (window);
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0
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315
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316 if (mir->vchild)
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272
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317 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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0
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318 else if (mir->hchild)
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272
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319 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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320 if (retval)
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0
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321 return retval;
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322
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323 if (hinstance || vinstance)
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324 {
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325 switch (type)
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326 {
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327 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
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272
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328 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
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329 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
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330 return mir;
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0
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331 break;
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332 case X_UPDATE_FRAME_SCROLLBARS:
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333 if (!mir->vchild && !mir->hchild)
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272
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334 update_window_scrollbars (w, mir, 1, 0);
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0
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335 break;
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336 case X_SET_SCROLLBAR_POINTER:
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337 if (!mir->vchild && !mir->hchild)
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338 {
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272
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339 Widget widget;
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0
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340
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272
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341 widget = SCROLLBAR_X_WIDGET (hinstance);
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342 if (widget && XtIsManaged (widget))
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343 update_one_widget_scrollbar_pointer (w, widget);
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0
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344
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272
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345 widget = SCROLLBAR_X_WIDGET (vinstance);
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346 if (widget && XtIsManaged (widget))
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347 update_one_widget_scrollbar_pointer (w, widget);
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0
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348 }
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349 break;
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350 case X_WINDOW_IS_SCROLLBAR:
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351 if (!mir->vchild && !mir->hchild)
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352 {
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272
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353 Widget widget;
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0
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354
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272
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355 widget = SCROLLBAR_X_WIDGET (hinstance);
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356 if (widget && XtIsManaged (widget) &&
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357 XtWindow (widget) == x_win)
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358 return (struct window_mirror *) 1;
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0
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359
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272
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360 widget = SCROLLBAR_X_WIDGET (vinstance);
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361 if (widget && XtIsManaged (widget) &&
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362 XtWindow (widget) == x_win)
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363 return (struct window_mirror *) 1;
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0
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364 }
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365 break;
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366 default:
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367 abort ();
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368 }
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369 }
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370
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371 mir = mir->next;
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272
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372 window = w->next;
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0
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373 }
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374
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375 return NULL;
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376 }
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377
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|
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378 /* Used by callbacks. */
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|
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379 static struct window_mirror *
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380 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
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|
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381 {
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382 if (f->mirror_dirty)
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383 update_frame_window_mirror (f);
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|
|
384 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
|
385 f->root_mirror, id, (Window) NULL);
|
|
|
386 }
|
|
|
387
|
|
|
388 /*
|
|
|
389 * This is the only callback provided for vertical scrollbars. It
|
|
|
390 * should be able to handle all of the scrollbar events in
|
|
|
391 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
392 * scroll_event (see lwlib.h). */
|
|
|
393 static void
|
|
|
394 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
395 XtPointer client_data)
|
|
|
396 {
|
|
|
397 /* This function can GC */
|
|
|
398 scroll_event *data = (scroll_event *) client_data;
|
|
|
399 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
400 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
288
|
401 Lisp_Object win, frame;
|
|
0
|
402 struct scrollbar_instance *instance;
|
|
|
403 struct window_mirror *mirror;
|
|
|
404
|
|
|
405 if (!f)
|
|
|
406 return;
|
|
|
407
|
|
|
408 mirror = find_scrollbar_window_mirror (f, id);
|
|
406
|
409 if (!mirror)
|
|
|
410 return;
|
|
|
411
|
|
0
|
412 win = real_window (mirror, 1);
|
|
|
413
|
|
|
414 if (NILP (win))
|
|
|
415 return;
|
|
|
416 instance = mirror->scrollbar_vertical_instance;
|
|
288
|
417 frame = WINDOW_FRAME (XWINDOW (win));
|
|
0
|
418
|
|
|
419 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
420 is called. #### Why??? */
|
|
|
421 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
422
|
|
|
423 switch (data->action)
|
|
|
424 {
|
|
|
425 case SCROLLBAR_LINE_UP:
|
|
288
|
426 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
|
|
0
|
427 break;
|
|
|
428
|
|
|
429 case SCROLLBAR_LINE_DOWN:
|
|
288
|
430 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
|
|
0
|
431 break;
|
|
|
432
|
|
|
433 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
434 Depending on where you click the size of the page varies.
|
|
|
435 Motif always does a standard Emacs page. */
|
|
|
436 case SCROLLBAR_PAGE_UP:
|
|
82
|
437 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
438 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
439 {
|
|
|
440 double tmp = ((double) data->slider_value /
|
|
|
441 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
442 double line = tmp *
|
|
|
443 (double) window_displayed_height (XWINDOW (win));
|
|
185
|
444
|
|
0
|
445 if (line > -1.0)
|
|
|
446 line = -1.0;
|
|
288
|
447 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
0
|
448 Fcons (win, make_int ((int) line)));
|
|
|
449 }
|
|
|
450 #else
|
|
288
|
451 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
0
|
452 Fcons (win, Qnil));
|
|
|
453 #endif
|
|
|
454 break;
|
|
|
455
|
|
|
456 case SCROLLBAR_PAGE_DOWN:
|
|
82
|
457 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
458 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
0
|
459 {
|
|
|
460 double tmp = ((double) data->slider_value /
|
|
|
461 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
462 double line = tmp *
|
|
|
463 (double) window_displayed_height (XWINDOW (win));
|
|
|
464
|
|
|
465 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
466 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
467 {
|
|
|
468 if (line < 1.0)
|
|
|
469 line = 1.0;
|
|
288
|
470 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
0
|
471 Fcons (win,
|
|
|
472 make_int ((int) line)));
|
|
|
473 }
|
|
|
474 }
|
|
|
475 #else
|
|
288
|
476 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
0
|
477 Fcons (win, Qnil));
|
|
|
478 #endif
|
|
|
479 break;
|
|
|
480
|
|
|
481 case SCROLLBAR_TOP:
|
|
288
|
482 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
|
|
0
|
483 break;
|
|
|
484
|
|
|
485 case SCROLLBAR_BOTTOM:
|
|
288
|
486 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
|
|
0
|
487 break;
|
|
|
488
|
|
|
489
|
|
|
490 case SCROLLBAR_CHANGE:
|
|
102
|
491 inhibit_slider_size_change = 0;
|
|
0
|
492 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
493 vertical_drag_in_progress = 0;
|
|
|
494 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
495 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
496 XINT (Fwindow_start (win));
|
|
84
|
497 #else
|
|
|
498 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
499 #endif
|
|
|
500 break;
|
|
|
501
|
|
|
502 case SCROLLBAR_DRAG:
|
|
|
503 {
|
|
|
504 int value;
|
|
|
505
|
|
102
|
506 inhibit_slider_size_change = 1;
|
|
0
|
507
|
|
|
508 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
509 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
510 want to avoid having the window position jump when you
|
|
|
511 first grab the scrollbar, but we also want to ensure that
|
|
|
512 you can scroll all the way to the top or bottom of the
|
|
|
513 buffer. This can all be replaced with something sane when
|
|
|
514 we get line-based scrolling. */
|
|
|
515
|
|
|
516 vertical_drag_in_progress = 1;
|
|
185
|
517
|
|
|
518 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
0
|
519 {
|
|
|
520 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
521 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
522 XINT (Fwindow_start (win));
|
|
|
523 }
|
|
|
524
|
|
|
525 /* Could replace this piecewise linear scrolling with a
|
|
|
526 quadratic through the three points, but I'm not sure that
|
|
|
527 would feel any nicer in practice. */
|
|
185
|
528 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
0
|
529 {
|
|
|
530 /* We've dragged up; slide linearly from original position to
|
|
|
531 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
532
|
|
|
533 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
185
|
534 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
0
|
535 {
|
|
|
536 /* shouldn't get here, but just in case */
|
|
|
537 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
538 }
|
|
|
539 else
|
|
|
540 {
|
|
272
|
541 value = (int)
|
|
|
542 (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
543 + (((double)
|
|
|
544 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
545 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
546 * (data->slider_value -
|
|
|
547 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
|
548 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
549 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
0
|
550 }
|
|
|
551 }
|
|
185
|
552 else
|
|
0
|
553 {
|
|
|
554 /* We've dragged down; slide linearly from original position to
|
|
|
555 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
556
|
|
185
|
557 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
0
|
558 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
559 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
560 {
|
|
|
561 /* avoid divide by zero */
|
|
|
562 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
185
|
563 }
|
|
|
564 else
|
|
0
|
565 {
|
|
272
|
566 value = (int)
|
|
|
567 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
568 + (((double)
|
|
|
569 (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
570 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
|
571 * (data->slider_value
|
|
|
572 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
|
573 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
574 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
575 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
0
|
576 }
|
|
|
577 }
|
|
|
578 #else
|
|
82
|
579 stupid_vertical_scrollbar_drag_hack = 0;
|
|
0
|
580 value = data->slider_value;
|
|
|
581 #endif
|
|
|
582
|
|
|
583 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
584 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
585 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
586 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
587
|
|
288
|
588 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
|
|
0
|
589 Fcons (win, make_int (value)));
|
|
|
590 }
|
|
|
591 break;
|
|
|
592
|
|
|
593 }
|
|
|
594 }
|
|
|
595
|
|
|
596 /*
|
|
|
597 * This is the only callback provided for horizontal scrollbars. It
|
|
|
598 * should be able to handle all of the scrollbar events in
|
|
|
599 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
600 * scroll_event (see lwlib.h). */
|
|
|
601 static void
|
|
|
602 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
603 XtPointer client_data)
|
|
|
604 {
|
|
|
605 scroll_event *data = (scroll_event *) client_data;
|
|
|
606 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
607 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
288
|
608 Lisp_Object win, frame;
|
|
0
|
609 struct window_mirror *mirror;
|
|
|
610
|
|
|
611 if (!f)
|
|
|
612 return;
|
|
|
613
|
|
|
614 mirror = find_scrollbar_window_mirror (f, id);
|
|
406
|
615 if (!mirror)
|
|
|
616 return;
|
|
|
617
|
|
0
|
618 win = real_window (mirror, 1);
|
|
|
619
|
|
|
620 if (NILP (win))
|
|
|
621 return;
|
|
288
|
622 frame = WINDOW_FRAME (XWINDOW (win));
|
|
0
|
623
|
|
|
624 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
625 is called. #### Why??? */
|
|
|
626 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
627
|
|
|
628 switch (data->action)
|
|
|
629 {
|
|
|
630 case SCROLLBAR_LINE_UP:
|
|
288
|
631 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
|
|
0
|
632 break;
|
|
|
633 case SCROLLBAR_LINE_DOWN:
|
|
288
|
634 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
|
|
0
|
635 break;
|
|
|
636 case SCROLLBAR_PAGE_UP:
|
|
288
|
637 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
|
|
0
|
638 break;
|
|
|
639 case SCROLLBAR_PAGE_DOWN:
|
|
288
|
640 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
|
|
0
|
641 break;
|
|
|
642 case SCROLLBAR_TOP:
|
|
288
|
643 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
|
|
0
|
644 break;
|
|
|
645 case SCROLLBAR_BOTTOM:
|
|
288
|
646 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
|
|
0
|
647 break;
|
|
|
648 case SCROLLBAR_CHANGE:
|
|
102
|
649 inhibit_slider_size_change = 0;
|
|
0
|
650 break;
|
|
|
651 case SCROLLBAR_DRAG:
|
|
102
|
652 inhibit_slider_size_change = 1;
|
|
0
|
653 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
654 Lucid is the one mostly wrong.*/
|
|
82
|
655 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
288
|
656 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
0
|
657 (Fcons
|
|
|
658 (win, make_int (data->slider_value))));
|
|
|
659 #else
|
|
288
|
660 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
0
|
661 (Fcons
|
|
|
662 (win,
|
|
|
663 make_int (data->slider_value - 1))));
|
|
|
664 #endif
|
|
|
665 break;
|
|
|
666 default:
|
|
|
667 break;
|
|
|
668 }
|
|
|
669 }
|
|
|
670
|
|
|
671 static void
|
|
|
672 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
673 {
|
|
272
|
674 Lisp_Object window;
|
|
0
|
675
|
|
|
676 XSETWINDOW (window, w);
|
|
|
677 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
|
678 0, (Window) NULL);
|
|
|
679 }
|
|
|
680
|
|
|
681 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
682 directly from x_set_frame_properties in frame-x.c*/
|
|
|
683 void
|
|
|
684 x_update_frame_scrollbars (struct frame *f)
|
|
|
685 {
|
|
|
686 /* Consider this code to be "in_display" so that we abort() if Fsignal()
|
|
|
687 gets called. */
|
|
|
688 in_display++;
|
|
|
689 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window, f->root_mirror,
|
|
|
690 0, (Window) NULL);
|
|
|
691 in_display--;
|
|
|
692 if (in_display < 0) abort ();
|
|
|
693 }
|
|
|
694
|
|
|
695 #ifdef MEMORY_USAGE_STATS
|
|
|
696
|
|
|
697 static int
|
|
|
698 x_compute_scrollbar_instance_usage (struct device *d,
|
|
|
699 struct scrollbar_instance *inst,
|
|
|
700 struct overhead_stats *ovstats)
|
|
|
701 {
|
|
|
702 int total = 0;
|
|
|
703
|
|
|
704 while (inst)
|
|
|
705 {
|
|
|
706 struct x_scrollbar_data *data =
|
|
|
707 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
|
708
|
|
|
709 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
710 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
|
711 ovstats);
|
|
|
712 inst = inst->next;
|
|
|
713 }
|
|
|
714
|
|
|
715 return total;
|
|
|
716 }
|
|
|
717
|
|
|
718 #endif /* MEMORY_USAGE_STATS */
|
|
|
719
|
|
|
720
|
|
|
721 /************************************************************************/
|
|
|
722 /* initialization */
|
|
|
723 /************************************************************************/
|
|
|
724
|
|
|
725 void
|
|
|
726 console_type_create_scrollbar_x (void)
|
|
|
727 {
|
|
102
|
728 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
0
|
729 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
|
730 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
|
731 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
|
732 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
733 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
|
734 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
735 #ifdef MEMORY_USAGE_STATS
|
|
|
736 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
737 #endif /* MEMORY_USAGE_STATS */
|
|
|
738 }
|
|
|
739
|
|
|
740 void
|
|
398
|
741 reinit_vars_of_scrollbar_x (void)
|
|
|
742 {
|
|
|
743 stupid_vertical_scrollbar_drag_hack = 1;
|
|
|
744 }
|
|
|
745
|
|
|
746 void
|
|
0
|
747 vars_of_scrollbar_x (void)
|
|
|
748 {
|
|
398
|
749 reinit_vars_of_scrollbar_x ();
|
|
|
750
|
|
0
|
751 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
752 Fprovide (intern ("lucid-scrollbars"));
|
|
|
753 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
754 Fprovide (intern ("motif-scrollbars"));
|
|
|
755 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
|
756 Fprovide (intern ("athena-scrollbars"));
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757 #endif
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758 }
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