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428
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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 Amdahl 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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442
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26 /* This file Mule-ized (more like Mule-verified) by Ben Wing, 7-8-00. */
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27
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428
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28 #include <config.h>
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29 #include "lisp.h"
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30
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872
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31 #include "device-impl.h"
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32 #include "frame-impl.h"
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800
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33 #include "window.h"
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34
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872
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35 #include "console-x-impl.h"
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428
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36 #include "glyphs-x.h"
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37 #include "scrollbar-x.h"
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38
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800
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39 #include "EmacsFrame.h"
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428
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40
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41 static void x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
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42 XtPointer client_data);
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43 static void x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
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44 XtPointer client_data);
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45
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46 /* Used to prevent changing the size of the slider while drag
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47 scrolling, under Motif. This is necessary because the Motif
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48 scrollbar is incredibly stupid about updating the slider and causes
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49 lots of flicker if it is done too often. */
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50 static int inhibit_slider_size_change;
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51 int stupid_vertical_scrollbar_drag_hack;
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52
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53 /* Doesn't work with athena */
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54 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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55 static int vertical_drag_in_progress;
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56 #endif
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57
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58
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59 /* A device method. */
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60 static int
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61 x_inhibit_scrollbar_slider_size_change (void)
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62 {
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63 /* Doesn't work with Athena */
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64 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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65 return inhibit_slider_size_change;
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66 #else
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67 return 0;
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68 #endif
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69 }
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70
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71 /* A device method. */
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72 static void
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73 x_free_scrollbar_instance (struct scrollbar_instance *instance)
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74 {
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75 if (SCROLLBAR_X_NAME (instance))
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1726
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76 xfree (SCROLLBAR_X_NAME (instance), char *);
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428
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77
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78 if (SCROLLBAR_X_WIDGET (instance))
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79 {
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80 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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81 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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82
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83 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
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84 }
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85
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86 if (instance->scrollbar_data)
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1726
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87 xfree (instance->scrollbar_data, void *);
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428
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88 }
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89
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90 /* A device method. */
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91 static void
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92 x_release_scrollbar_instance (struct scrollbar_instance *instance)
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93 {
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94 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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95 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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96 }
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97
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98 /* A device method. */
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99 static void
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100 x_create_scrollbar_instance (struct frame *f, int vertical,
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101 struct scrollbar_instance *instance)
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102 {
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103 char buffer[32];
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104
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105 /* initialize the X specific data section. */
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106 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
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107
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108 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
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109 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
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110 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
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111 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
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112 defined (LWLIB_SCROLLBARS_ATHENA3D)
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113 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
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114 #endif
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115
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116 if (vertical)
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117 {
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118 SCROLLBAR_X_WIDGET (instance) =
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119 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
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120 SCROLLBAR_X_ID (instance),
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121 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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122 x_update_vertical_scrollbar_callback, NULL, NULL);
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123 }
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124 else
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125 {
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126 SCROLLBAR_X_WIDGET (instance) =
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127 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
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128 SCROLLBAR_X_ID (instance),
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129 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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130 x_update_horizontal_scrollbar_callback, NULL, NULL);
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131 }
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132 }
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133
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134 #define UPDATE_DATA_FIELD(field) \
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135 if (new_##field >= 0 && \
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136 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
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137 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
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138 inst->scrollbar_instance_changed = 1; \
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139 }
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140
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141 /* A device method. */
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142 /* #### The -1 check is such a hack. */
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143 static void
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144 x_update_scrollbar_instance_values (struct window *w,
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145 struct scrollbar_instance *inst,
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146 int new_line_increment,
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147 int new_page_increment,
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148 int new_minimum, int new_maximum,
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149 int new_slider_size,
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150 int new_slider_position,
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151 int new_scrollbar_width,
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152 int new_scrollbar_height,
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153 int new_scrollbar_x, int new_scrollbar_y)
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154 {
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155 UPDATE_DATA_FIELD (line_increment);
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156 UPDATE_DATA_FIELD (page_increment);
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157 UPDATE_DATA_FIELD (minimum);
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158 UPDATE_DATA_FIELD (maximum);
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159 UPDATE_DATA_FIELD (slider_size);
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160 UPDATE_DATA_FIELD (slider_position);
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161 UPDATE_DATA_FIELD (scrollbar_width);
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162 UPDATE_DATA_FIELD (scrollbar_height);
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163 UPDATE_DATA_FIELD (scrollbar_x);
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164 UPDATE_DATA_FIELD (scrollbar_y);
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165
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166 /* This doesn't work with Athena, why? */
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167 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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168 if (w && !vertical_drag_in_progress)
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169 {
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170 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
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171 int new_vows = marker_position (w->start[CURRENT_DISP]);
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172
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173 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
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174 {
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175 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
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176 inst->scrollbar_instance_changed = 1;
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177 }
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178 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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179 {
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180 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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181 inst->scrollbar_instance_changed = 1;
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182 }
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183 }
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184 #endif
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185 }
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186
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187 /* Used by x_update_scrollbar_instance_status. */
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188 static void
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189 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
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190 {
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191 Boolean use_backing_store;
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192
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193 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
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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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199
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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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218 wv->scrollbar_data = xnew (scrollbar_values);
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219
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220 wv->name = SCROLLBAR_X_NAME (instance);
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436
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221 wv->name = xstrdup (wv->name);
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428
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222 wv->value = 0;
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223 wv->key = 0;
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224 wv->enabled = instance->scrollbar_is_active;
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225 wv->selected = 0;
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226 wv->call_data = NULL;
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227
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228 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
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229
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230 wv->next = NULL;
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231
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232 return wv;
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233 }
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234
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235 /* Used by x_update_scrollbar_instance_status. */
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236 static void
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237 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
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238 {
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239 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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240 {
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241 XDefineCursor (XtDisplay (wid), XtWindow (wid),
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242 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
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243 XSync (XtDisplay (wid), False);
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244 }
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245 }
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246
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247 /* A device method. */
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248 static void
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249 x_update_scrollbar_instance_status (struct window *w, int active, int size,
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250 struct scrollbar_instance *instance)
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251 {
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252 struct frame *f = XFRAME (w->frame);
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253 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
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254
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255 if (active && size)
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256 {
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257 widget_value *wv = scrollbar_instance_to_widget_value (instance);
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258
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259 if (instance->scrollbar_instance_changed)
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260 {
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261 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
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262 instance->scrollbar_instance_changed = 0;
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263 }
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264
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265 if (!managed)
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266 {
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267 XtManageChild (SCROLLBAR_X_WIDGET (instance));
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268 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
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269 {
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270 /* Raise this window so that it's visible on top of the
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271 text window below it. */
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272 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
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273 XtWindow (SCROLLBAR_X_WIDGET (instance)));
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274 update_one_widget_scrollbar_pointer
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275 (w, SCROLLBAR_X_WIDGET (instance));
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276 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
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277 {
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278 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
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279 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
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280 }
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|
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281 }
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|
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282 }
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283
|
|
2500
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284 if (!wv->scrollbar_data) ABORT ();
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|
436
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285 free_widget_value_tree (wv);
|
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428
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286 }
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287 else if (managed)
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|
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288 {
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|
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289 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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290 /* This isn't needed with Athena Scrollbars. It might not be needed */
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291 /* with Motif scrollbars (it is apparently needed with Lesstif). */
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292 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
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|
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293 #endif
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|
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294 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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|
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295 }
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|
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296 }
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|
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297
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|
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298 enum x_scrollbar_loop
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|
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299 {
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300 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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301 X_SET_SCROLLBAR_POINTER,
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302 X_WINDOW_IS_SCROLLBAR,
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303 X_UPDATE_FRAME_SCROLLBARS
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304 };
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305
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|
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306 static struct window_mirror *
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307 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
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|
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308 struct window_mirror *mir,
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|
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309 LWLIB_ID id, Window x_win)
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|
|
310 {
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|
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311 struct window_mirror *retval = NULL;
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|
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312
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|
|
313 while (mir)
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|
|
314 {
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|
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315 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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|
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316 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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|
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317 struct window *w = XWINDOW (window);
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|
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318
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|
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319 if (mir->vchild)
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|
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320 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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|
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321 else if (mir->hchild)
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322 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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|
|
323 if (retval)
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|
|
324 return retval;
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|
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325
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|
|
326 if (hinstance || vinstance)
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|
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327 {
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|
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328 switch (type)
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|
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329 {
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|
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330 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
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|
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331 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
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|
|
332 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
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333 return mir;
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|
|
334 break;
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|
|
335 case X_UPDATE_FRAME_SCROLLBARS:
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|
|
336 if (!mir->vchild && !mir->hchild)
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|
|
337 update_window_scrollbars (w, mir, 1, 0);
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|
|
338 break;
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|
|
339 case X_SET_SCROLLBAR_POINTER:
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|
|
340 if (!mir->vchild && !mir->hchild)
|
|
|
341 {
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|
|
342 Widget widget;
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|
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343
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|
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344 widget = SCROLLBAR_X_WIDGET (hinstance);
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|
|
345 if (widget && XtIsManaged (widget))
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|
|
346 update_one_widget_scrollbar_pointer (w, widget);
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|
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347
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|
|
348 widget = SCROLLBAR_X_WIDGET (vinstance);
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|
|
349 if (widget && XtIsManaged (widget))
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|
|
350 update_one_widget_scrollbar_pointer (w, widget);
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|
|
351 }
|
|
|
352 break;
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|
|
353 case X_WINDOW_IS_SCROLLBAR:
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|
|
354 if (!mir->vchild && !mir->hchild)
|
|
|
355 {
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|
|
356 Widget widget;
|
|
|
357
|
|
|
358 widget = SCROLLBAR_X_WIDGET (hinstance);
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|
|
359 if (widget && XtIsManaged (widget) &&
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|
|
360 XtWindow (widget) == x_win)
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|
|
361 return (struct window_mirror *) 1;
|
|
|
362
|
|
|
363 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
|
364 if (widget && XtIsManaged (widget) &&
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|
|
365 XtWindow (widget) == x_win)
|
|
|
366 return (struct window_mirror *) 1;
|
|
|
367 }
|
|
|
368 break;
|
|
|
369 default:
|
|
2500
|
370 ABORT ();
|
|
428
|
371 }
|
|
|
372 }
|
|
|
373
|
|
|
374 mir = mir->next;
|
|
|
375 window = w->next;
|
|
|
376 }
|
|
|
377
|
|
|
378 return NULL;
|
|
|
379 }
|
|
|
380
|
|
|
381 /* Used by callbacks. */
|
|
|
382 static struct window_mirror *
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|
|
383 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
|
|
|
384 {
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|
|
385 if (f->mirror_dirty)
|
|
|
386 update_frame_window_mirror (f);
|
|
|
387 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
617
|
388 XWINDOW_MIRROR (f->root_mirror), id, (Window) NULL);
|
|
428
|
389 }
|
|
|
390
|
|
|
391 /*
|
|
|
392 * This is the only callback provided for vertical scrollbars. It
|
|
|
393 * should be able to handle all of the scrollbar events in
|
|
|
394 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
395 * scroll_event (see lwlib.h). */
|
|
|
396 static void
|
|
|
397 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
398 XtPointer client_data)
|
|
|
399 {
|
|
|
400 /* This function can GC */
|
|
|
401 scroll_event *data = (scroll_event *) client_data;
|
|
|
402 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
403 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
404 Lisp_Object win, frame;
|
|
|
405 struct scrollbar_instance *instance;
|
|
|
406 struct window_mirror *mirror;
|
|
|
407
|
|
|
408 if (!f)
|
|
|
409 return;
|
|
|
410
|
|
|
411 mirror = find_scrollbar_window_mirror (f, id);
|
|
442
|
412 if (!mirror)
|
|
|
413 return;
|
|
|
414
|
|
428
|
415 win = real_window (mirror, 1);
|
|
|
416
|
|
|
417 if (NILP (win))
|
|
|
418 return;
|
|
|
419 instance = mirror->scrollbar_vertical_instance;
|
|
|
420 frame = WINDOW_FRAME (XWINDOW (win));
|
|
|
421
|
|
|
422 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
423 is called. #### Why??? */
|
|
|
424 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
425
|
|
|
426 switch (data->action)
|
|
|
427 {
|
|
|
428 case SCROLLBAR_LINE_UP:
|
|
|
429 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
|
|
|
430 break;
|
|
|
431
|
|
|
432 case SCROLLBAR_LINE_DOWN:
|
|
|
433 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
|
|
|
434 break;
|
|
|
435
|
|
|
436 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
437 Depending on where you click the size of the page varies.
|
|
|
438 Motif always does a standard Emacs page. */
|
|
|
439 case SCROLLBAR_PAGE_UP:
|
|
|
440 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
441 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
442 {
|
|
|
443 double tmp = ((double) data->slider_value /
|
|
|
444 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
445 double line = tmp *
|
|
|
446 (double) window_displayed_height (XWINDOW (win));
|
|
|
447
|
|
|
448 if (line > -1.0)
|
|
|
449 line = -1.0;
|
|
|
450 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
|
451 Fcons (win, make_int ((int) line)));
|
|
|
452 }
|
|
|
453 #else
|
|
|
454 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
|
455 Fcons (win, Qnil));
|
|
|
456 #endif
|
|
|
457 break;
|
|
|
458
|
|
|
459 case SCROLLBAR_PAGE_DOWN:
|
|
|
460 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
461 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
462 {
|
|
|
463 double tmp = ((double) data->slider_value /
|
|
|
464 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
465 double line = tmp *
|
|
|
466 (double) window_displayed_height (XWINDOW (win));
|
|
|
467
|
|
|
468 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
469 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
470 {
|
|
|
471 if (line < 1.0)
|
|
|
472 line = 1.0;
|
|
|
473 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
|
474 Fcons (win,
|
|
|
475 make_int ((int) line)));
|
|
|
476 }
|
|
|
477 }
|
|
|
478 #else
|
|
|
479 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
|
480 Fcons (win, Qnil));
|
|
|
481 #endif
|
|
|
482 break;
|
|
|
483
|
|
|
484 case SCROLLBAR_TOP:
|
|
|
485 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
|
|
|
486 break;
|
|
|
487
|
|
|
488 case SCROLLBAR_BOTTOM:
|
|
|
489 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
|
|
|
490 break;
|
|
|
491
|
|
|
492
|
|
|
493 case SCROLLBAR_CHANGE:
|
|
|
494 inhibit_slider_size_change = 0;
|
|
|
495 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
496 vertical_drag_in_progress = 0;
|
|
|
497 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
498 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
499 XINT (Fwindow_start (win));
|
|
|
500 #else
|
|
|
501 stupid_vertical_scrollbar_drag_hack = 0;
|
|
|
502 #endif
|
|
|
503 break;
|
|
|
504
|
|
|
505 case SCROLLBAR_DRAG:
|
|
|
506 {
|
|
|
507 int value;
|
|
|
508
|
|
|
509 inhibit_slider_size_change = 1;
|
|
|
510
|
|
|
511 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
512 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
513 want to avoid having the window position jump when you
|
|
|
514 first grab the scrollbar, but we also want to ensure that
|
|
|
515 you can scroll all the way to the top or bottom of the
|
|
|
516 buffer. This can all be replaced with something sane when
|
|
|
517 we get line-based scrolling. */
|
|
|
518
|
|
|
519 vertical_drag_in_progress = 1;
|
|
|
520
|
|
|
521 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
|
522 {
|
|
|
523 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
524 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
525 XINT (Fwindow_start (win));
|
|
|
526 }
|
|
|
527
|
|
|
528 /* Could replace this piecewise linear scrolling with a
|
|
|
529 quadratic through the three points, but I'm not sure that
|
|
|
530 would feel any nicer in practice. */
|
|
|
531 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
|
532 {
|
|
|
533 /* We've dragged up; slide linearly from original position to
|
|
|
534 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
535
|
|
|
536 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
537 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
538 {
|
|
|
539 /* shouldn't get here, but just in case */
|
|
|
540 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
541 }
|
|
|
542 else
|
|
|
543 {
|
|
|
544 value = (int)
|
|
|
545 (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
546 + (((double)
|
|
|
547 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
548 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
549 * (data->slider_value -
|
|
|
550 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
|
551 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
552 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
|
553 }
|
|
|
554 }
|
|
|
555 else
|
|
|
556 {
|
|
|
557 /* We've dragged down; slide linearly from original position to
|
|
|
558 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
559
|
|
|
560 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
561 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
562 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
563 {
|
|
|
564 /* avoid divide by zero */
|
|
|
565 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
|
566 }
|
|
|
567 else
|
|
|
568 {
|
|
|
569 value = (int)
|
|
|
570 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
571 + (((double)
|
|
|
572 (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
573 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
|
574 * (data->slider_value
|
|
|
575 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
|
576 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
577 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
578 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
|
579 }
|
|
|
580 }
|
|
|
581 #else
|
|
|
582 stupid_vertical_scrollbar_drag_hack = 0;
|
|
|
583 value = data->slider_value;
|
|
|
584 #endif
|
|
|
585
|
|
|
586 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
587 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
588 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
589 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
590
|
|
|
591 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
|
|
|
592 Fcons (win, make_int (value)));
|
|
|
593 }
|
|
|
594 break;
|
|
|
595
|
|
|
596 }
|
|
|
597 }
|
|
|
598
|
|
|
599 /*
|
|
|
600 * This is the only callback provided for horizontal scrollbars. It
|
|
|
601 * should be able to handle all of the scrollbar events in
|
|
|
602 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
603 * scroll_event (see lwlib.h). */
|
|
|
604 static void
|
|
|
605 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
606 XtPointer client_data)
|
|
|
607 {
|
|
|
608 scroll_event *data = (scroll_event *) client_data;
|
|
|
609 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
610 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
611 Lisp_Object win, frame;
|
|
|
612 struct window_mirror *mirror;
|
|
|
613
|
|
|
614 if (!f)
|
|
|
615 return;
|
|
|
616
|
|
|
617 mirror = find_scrollbar_window_mirror (f, id);
|
|
442
|
618 if (!mirror)
|
|
|
619 return;
|
|
|
620
|
|
428
|
621 win = real_window (mirror, 1);
|
|
|
622
|
|
|
623 if (NILP (win))
|
|
|
624 return;
|
|
|
625 frame = WINDOW_FRAME (XWINDOW (win));
|
|
|
626
|
|
|
627 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
628 is called. #### Why??? */
|
|
|
629 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
630
|
|
|
631 switch (data->action)
|
|
|
632 {
|
|
|
633 case SCROLLBAR_LINE_UP:
|
|
|
634 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
|
|
|
635 break;
|
|
|
636 case SCROLLBAR_LINE_DOWN:
|
|
|
637 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
|
|
|
638 break;
|
|
|
639 case SCROLLBAR_PAGE_UP:
|
|
|
640 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
|
|
|
641 break;
|
|
|
642 case SCROLLBAR_PAGE_DOWN:
|
|
|
643 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
|
|
|
644 break;
|
|
|
645 case SCROLLBAR_TOP:
|
|
|
646 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
|
|
|
647 break;
|
|
|
648 case SCROLLBAR_BOTTOM:
|
|
|
649 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
|
|
|
650 break;
|
|
|
651 case SCROLLBAR_CHANGE:
|
|
|
652 inhibit_slider_size_change = 0;
|
|
|
653 break;
|
|
|
654 case SCROLLBAR_DRAG:
|
|
|
655 inhibit_slider_size_change = 1;
|
|
|
656 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
657 Lucid is the one mostly wrong.*/
|
|
|
658 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
659 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
|
660 (Fcons
|
|
|
661 (win, make_int (data->slider_value))));
|
|
|
662 #else
|
|
|
663 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
|
664 (Fcons
|
|
|
665 (win,
|
|
|
666 make_int (data->slider_value - 1))));
|
|
|
667 #endif
|
|
|
668 break;
|
|
|
669 default:
|
|
|
670 break;
|
|
|
671 }
|
|
|
672 }
|
|
|
673
|
|
|
674 static void
|
|
|
675 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
676 {
|
|
793
|
677 Lisp_Object window = wrap_window (w);
|
|
428
|
678
|
|
|
679 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
|
680 0, (Window) NULL);
|
|
|
681 }
|
|
|
682
|
|
|
683 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
684 directly from x_set_frame_properties in frame-x.c*/
|
|
|
685 void
|
|
|
686 x_update_frame_scrollbars (struct frame *f)
|
|
|
687 {
|
|
617
|
688 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window,
|
|
|
689 XWINDOW_MIRROR (f->root_mirror), 0, (Window) NULL);
|
|
428
|
690 }
|
|
|
691
|
|
|
692 #ifdef MEMORY_USAGE_STATS
|
|
|
693
|
|
|
694 static int
|
|
2286
|
695 x_compute_scrollbar_instance_usage (struct device *UNUSED (d),
|
|
428
|
696 struct scrollbar_instance *inst,
|
|
|
697 struct overhead_stats *ovstats)
|
|
|
698 {
|
|
|
699 int total = 0;
|
|
|
700
|
|
|
701 while (inst)
|
|
|
702 {
|
|
|
703 struct x_scrollbar_data *data =
|
|
|
704 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
|
705
|
|
|
706 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
707 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
|
708 ovstats);
|
|
|
709 inst = inst->next;
|
|
|
710 }
|
|
|
711
|
|
|
712 return total;
|
|
|
713 }
|
|
|
714
|
|
|
715 #endif /* MEMORY_USAGE_STATS */
|
|
|
716
|
|
|
717
|
|
|
718 /************************************************************************/
|
|
|
719 /* initialization */
|
|
|
720 /************************************************************************/
|
|
|
721
|
|
|
722 void
|
|
|
723 console_type_create_scrollbar_x (void)
|
|
|
724 {
|
|
|
725 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
|
726 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
|
727 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
|
728 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
|
729 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
730 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
|
731 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
732 #ifdef MEMORY_USAGE_STATS
|
|
|
733 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
734 #endif /* MEMORY_USAGE_STATS */
|
|
|
735 }
|
|
|
736
|
|
|
737 void
|
|
|
738 reinit_vars_of_scrollbar_x (void)
|
|
|
739 {
|
|
|
740 stupid_vertical_scrollbar_drag_hack = 1;
|
|
|
741 }
|
|
|
742
|
|
|
743 void
|
|
|
744 vars_of_scrollbar_x (void)
|
|
|
745 {
|
|
|
746 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
747 Fprovide (intern ("lucid-scrollbars"));
|
|
|
748 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
749 Fprovide (intern ("motif-scrollbars"));
|
|
|
750 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
|
751 Fprovide (intern ("athena-scrollbars"));
|
|
|
752 #endif
|
|
|
753 }
|
