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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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3462
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75 if (instance->scrollbar_data)
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428
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76 {
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3462
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77 if (SCROLLBAR_X_NAME (instance))
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78 xfree (SCROLLBAR_X_NAME (instance), char *);
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428
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79
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3462
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80 if (SCROLLBAR_X_WIDGET (instance))
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81 {
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82 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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83 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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428
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84
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3462
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85 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
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86 }
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87
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88 xfree (instance->scrollbar_data, void *);
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89 }
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428
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90 }
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91
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92 /* A device method. */
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93 static void
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94 x_release_scrollbar_instance (struct scrollbar_instance *instance)
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95 {
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96 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
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97 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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98 }
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99
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100 /* A device method. */
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101 static void
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102 x_create_scrollbar_instance (struct frame *f, int vertical,
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103 struct scrollbar_instance *instance)
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104 {
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105 char buffer[32];
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106
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107 /* initialize the X specific data section. */
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108 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
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109
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110 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
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111 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
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112 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
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113 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
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114 defined (LWLIB_SCROLLBARS_ATHENA3D)
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115 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
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116 #endif
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117
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118 if (vertical)
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119 {
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120 SCROLLBAR_X_WIDGET (instance) =
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121 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
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122 SCROLLBAR_X_ID (instance),
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123 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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124 x_update_vertical_scrollbar_callback, NULL, NULL);
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125 }
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126 else
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127 {
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128 SCROLLBAR_X_WIDGET (instance) =
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129 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
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130 SCROLLBAR_X_ID (instance),
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131 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
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132 x_update_horizontal_scrollbar_callback, NULL, NULL);
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133 }
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134 }
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135
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136 #define UPDATE_DATA_FIELD(field) \
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137 if (new_##field >= 0 && \
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138 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
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139 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
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140 inst->scrollbar_instance_changed = 1; \
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141 }
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142
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143 /* A device method. */
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144 /* #### The -1 check is such a hack. */
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145 static void
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146 x_update_scrollbar_instance_values (struct window *w,
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147 struct scrollbar_instance *inst,
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148 int new_line_increment,
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149 int new_page_increment,
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150 int new_minimum, int new_maximum,
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151 int new_slider_size,
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152 int new_slider_position,
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153 int new_scrollbar_width,
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154 int new_scrollbar_height,
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155 int new_scrollbar_x, int new_scrollbar_y)
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156 {
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157 UPDATE_DATA_FIELD (line_increment);
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158 UPDATE_DATA_FIELD (page_increment);
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159 UPDATE_DATA_FIELD (minimum);
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160 UPDATE_DATA_FIELD (maximum);
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161 UPDATE_DATA_FIELD (slider_size);
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162 UPDATE_DATA_FIELD (slider_position);
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163 UPDATE_DATA_FIELD (scrollbar_width);
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164 UPDATE_DATA_FIELD (scrollbar_height);
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165 UPDATE_DATA_FIELD (scrollbar_x);
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166 UPDATE_DATA_FIELD (scrollbar_y);
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167
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168 /* This doesn't work with Athena, why? */
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169 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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170 if (w && !vertical_drag_in_progress)
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171 {
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172 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
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173 int new_vows = marker_position (w->start[CURRENT_DISP]);
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174
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175 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
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176 {
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177 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
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178 inst->scrollbar_instance_changed = 1;
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179 }
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180 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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181 {
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182 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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183 inst->scrollbar_instance_changed = 1;
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184 }
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185 }
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186 #endif
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187 }
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188
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189 /* Used by x_update_scrollbar_instance_status. */
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190 static void
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191 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
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192 {
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193 Boolean use_backing_store;
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194
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195 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
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196
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197 if (use_backing_store && sb_widget)
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198 {
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199 unsigned long mask = CWBackingStore;
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200 XSetWindowAttributes attrs;
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201
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202 attrs.backing_store = Always;
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203 XChangeWindowAttributes (XtDisplay (sb_widget),
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204 XtWindow (sb_widget),
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205 mask,
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206 &attrs);
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207 }
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208 }
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209
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210 /* Create a widget value structure for passing down to lwlib so that
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211 it can update the scrollbar widgets. Used by
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212 x_update_scrollbar_instance_status. */
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213 static widget_value *
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214 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
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215 {
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216 widget_value *wv;
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217
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218 wv = xmalloc_widget_value ();
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219 /* #### maybe should add malloc_scrollbar_values to resource these? */
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220 wv->scrollbar_data = xnew (scrollbar_values);
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221
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222 wv->name = SCROLLBAR_X_NAME (instance);
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436
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223 wv->name = xstrdup (wv->name);
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428
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224 wv->value = 0;
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225 wv->key = 0;
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226 wv->enabled = instance->scrollbar_is_active;
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227 wv->selected = 0;
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228 wv->call_data = NULL;
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229
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230 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
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231
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232 wv->next = NULL;
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233
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234 return wv;
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235 }
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236
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237 /* Used by x_update_scrollbar_instance_status. */
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238 static void
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239 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
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240 {
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241 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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242 {
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243 XDefineCursor (XtDisplay (wid), XtWindow (wid),
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244 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
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245 XSync (XtDisplay (wid), False);
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246 }
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247 }
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248
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249 /* A device method. */
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250 static void
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251 x_update_scrollbar_instance_status (struct window *w, int active, int size,
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252 struct scrollbar_instance *instance)
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253 {
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254 struct frame *f = XFRAME (w->frame);
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255 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
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256
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257 if (active && size)
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258 {
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259 widget_value *wv = scrollbar_instance_to_widget_value (instance);
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260
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261 if (instance->scrollbar_instance_changed)
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262 {
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263 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
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264 instance->scrollbar_instance_changed = 0;
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265 }
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266
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267 if (!managed)
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268 {
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269 XtManageChild (SCROLLBAR_X_WIDGET (instance));
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270 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
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271 {
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272 /* Raise this window so that it's visible on top of the
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273 text window below it. */
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274 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
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275 XtWindow (SCROLLBAR_X_WIDGET (instance)));
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276 update_one_widget_scrollbar_pointer
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277 (w, SCROLLBAR_X_WIDGET (instance));
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278 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
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279 {
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280 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
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281 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
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282 }
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283 }
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|
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284 }
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285
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|
2500
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286 if (!wv->scrollbar_data) ABORT ();
|
|
436
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287 free_widget_value_tree (wv);
|
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428
|
288 }
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289 else if (managed)
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|
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290 {
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291 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
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292 /* This isn't needed with Athena Scrollbars. It might not be needed */
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293 /* with Motif scrollbars (it is apparently needed with Lesstif). */
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294 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
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295 #endif
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296 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
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|
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297 }
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|
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298 }
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|
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299
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300 enum x_scrollbar_loop
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|
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301 {
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302 X_FIND_SCROLLBAR_WINDOW_MIRROR,
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303 X_SET_SCROLLBAR_POINTER,
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304 X_WINDOW_IS_SCROLLBAR,
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305 X_UPDATE_FRAME_SCROLLBARS
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|
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306 };
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307
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|
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308 static struct window_mirror *
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309 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
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|
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310 struct window_mirror *mir,
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|
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311 LWLIB_ID id, Window x_win)
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|
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312 {
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|
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313 struct window_mirror *retval = NULL;
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314
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|
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315 while (mir)
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316 {
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|
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317 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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|
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318 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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|
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319 struct window *w = XWINDOW (window);
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320
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|
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321 if (mir->vchild)
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322 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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323 else if (mir->hchild)
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|
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324 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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|
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325 if (retval)
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326 return retval;
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327
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|
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328 if (hinstance || vinstance)
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|
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329 {
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|
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330 switch (type)
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|
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331 {
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|
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332 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
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|
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333 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
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|
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334 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
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|
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335 return mir;
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|
|
336 break;
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|
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337 case X_UPDATE_FRAME_SCROLLBARS:
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|
|
338 if (!mir->vchild && !mir->hchild)
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|
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339 update_window_scrollbars (w, mir, 1, 0);
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|
|
340 break;
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|
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341 case X_SET_SCROLLBAR_POINTER:
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|
|
342 if (!mir->vchild && !mir->hchild)
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|
|
343 {
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|
|
344 Widget widget;
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|
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345
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|
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346 widget = SCROLLBAR_X_WIDGET (hinstance);
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|
|
347 if (widget && XtIsManaged (widget))
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|
|
348 update_one_widget_scrollbar_pointer (w, widget);
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|
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349
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|
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350 widget = SCROLLBAR_X_WIDGET (vinstance);
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|
|
351 if (widget && XtIsManaged (widget))
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|
|
352 update_one_widget_scrollbar_pointer (w, widget);
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|
|
353 }
|
|
|
354 break;
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|
|
355 case X_WINDOW_IS_SCROLLBAR:
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|
|
356 if (!mir->vchild && !mir->hchild)
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|
|
357 {
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|
|
358 Widget widget;
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|
|
359
|
|
|
360 widget = SCROLLBAR_X_WIDGET (hinstance);
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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;
|
|
|
364
|
|
|
365 widget = SCROLLBAR_X_WIDGET (vinstance);
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|
|
366 if (widget && XtIsManaged (widget) &&
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|
|
367 XtWindow (widget) == x_win)
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|
|
368 return (struct window_mirror *) 1;
|
|
|
369 }
|
|
|
370 break;
|
|
|
371 default:
|
|
2500
|
372 ABORT ();
|
|
428
|
373 }
|
|
|
374 }
|
|
|
375
|
|
|
376 mir = mir->next;
|
|
|
377 window = w->next;
|
|
|
378 }
|
|
|
379
|
|
|
380 return NULL;
|
|
|
381 }
|
|
|
382
|
|
|
383 /* Used by callbacks. */
|
|
|
384 static struct window_mirror *
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|
|
385 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
|
|
|
386 {
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|
|
387 if (f->mirror_dirty)
|
|
|
388 update_frame_window_mirror (f);
|
|
|
389 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
|
617
|
390 XWINDOW_MIRROR (f->root_mirror), id, (Window) NULL);
|
|
428
|
391 }
|
|
|
392
|
|
|
393 /*
|
|
|
394 * This is the only callback provided for vertical scrollbars. It
|
|
|
395 * should be able to handle all of the scrollbar events in
|
|
|
396 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
397 * scroll_event (see lwlib.h). */
|
|
|
398 static void
|
|
|
399 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
400 XtPointer client_data)
|
|
|
401 {
|
|
|
402 /* This function can GC */
|
|
|
403 scroll_event *data = (scroll_event *) client_data;
|
|
|
404 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
405 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
406 Lisp_Object win, frame;
|
|
|
407 struct scrollbar_instance *instance;
|
|
|
408 struct window_mirror *mirror;
|
|
|
409
|
|
|
410 if (!f)
|
|
|
411 return;
|
|
|
412
|
|
|
413 mirror = find_scrollbar_window_mirror (f, id);
|
|
442
|
414 if (!mirror)
|
|
|
415 return;
|
|
|
416
|
|
428
|
417 win = real_window (mirror, 1);
|
|
|
418
|
|
|
419 if (NILP (win))
|
|
|
420 return;
|
|
|
421 instance = mirror->scrollbar_vertical_instance;
|
|
|
422 frame = WINDOW_FRAME (XWINDOW (win));
|
|
|
423
|
|
|
424 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
425 is called. #### Why??? */
|
|
|
426 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
427
|
|
|
428 switch (data->action)
|
|
|
429 {
|
|
|
430 case SCROLLBAR_LINE_UP:
|
|
|
431 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
|
|
|
432 break;
|
|
|
433
|
|
|
434 case SCROLLBAR_LINE_DOWN:
|
|
|
435 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
|
|
|
436 break;
|
|
|
437
|
|
|
438 /* The Athena scrollbar paging behavior is that of xterms.
|
|
|
439 Depending on where you click the size of the page varies.
|
|
|
440 Motif always does a standard Emacs page. */
|
|
|
441 case SCROLLBAR_PAGE_UP:
|
|
|
442 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
443 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
444 {
|
|
|
445 double tmp = ((double) data->slider_value /
|
|
|
446 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
447 double line = tmp *
|
|
|
448 (double) window_displayed_height (XWINDOW (win));
|
|
|
449
|
|
|
450 if (line > -1.0)
|
|
|
451 line = -1.0;
|
|
|
452 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
|
453 Fcons (win, make_int ((int) line)));
|
|
|
454 }
|
|
|
455 #else
|
|
|
456 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
|
457 Fcons (win, Qnil));
|
|
|
458 #endif
|
|
|
459 break;
|
|
|
460
|
|
|
461 case SCROLLBAR_PAGE_DOWN:
|
|
|
462 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
|
463 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
464 {
|
|
|
465 double tmp = ((double) data->slider_value /
|
|
|
466 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
|
467 double line = tmp *
|
|
|
468 (double) window_displayed_height (XWINDOW (win));
|
|
|
469
|
|
|
470 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
|
471 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
|
472 {
|
|
|
473 if (line < 1.0)
|
|
|
474 line = 1.0;
|
|
|
475 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
|
476 Fcons (win,
|
|
|
477 make_int ((int) line)));
|
|
|
478 }
|
|
|
479 }
|
|
|
480 #else
|
|
|
481 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
|
482 Fcons (win, Qnil));
|
|
|
483 #endif
|
|
|
484 break;
|
|
|
485
|
|
|
486 case SCROLLBAR_TOP:
|
|
|
487 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
|
|
|
488 break;
|
|
|
489
|
|
|
490 case SCROLLBAR_BOTTOM:
|
|
|
491 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
|
|
|
492 break;
|
|
|
493
|
|
|
494
|
|
|
495 case SCROLLBAR_CHANGE:
|
|
|
496 inhibit_slider_size_change = 0;
|
|
|
497 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
498 vertical_drag_in_progress = 0;
|
|
|
499 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
500 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
501 XINT (Fwindow_start (win));
|
|
|
502 #else
|
|
|
503 stupid_vertical_scrollbar_drag_hack = 0;
|
|
|
504 #endif
|
|
|
505 break;
|
|
|
506
|
|
|
507 case SCROLLBAR_DRAG:
|
|
|
508 {
|
|
|
509 int value;
|
|
|
510
|
|
|
511 inhibit_slider_size_change = 1;
|
|
|
512
|
|
|
513 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
514 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
|
515 want to avoid having the window position jump when you
|
|
|
516 first grab the scrollbar, but we also want to ensure that
|
|
|
517 you can scroll all the way to the top or bottom of the
|
|
|
518 buffer. This can all be replaced with something sane when
|
|
|
519 we get line-based scrolling. */
|
|
|
520
|
|
|
521 vertical_drag_in_progress = 1;
|
|
|
522
|
|
|
523 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
|
524 {
|
|
|
525 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
|
526 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
|
527 XINT (Fwindow_start (win));
|
|
|
528 }
|
|
|
529
|
|
|
530 /* Could replace this piecewise linear scrolling with a
|
|
|
531 quadratic through the three points, but I'm not sure that
|
|
|
532 would feel any nicer in practice. */
|
|
|
533 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
|
534 {
|
|
|
535 /* We've dragged up; slide linearly from original position to
|
|
|
536 window-start=data.minimum, slider-value=data.minimum. */
|
|
|
537
|
|
|
538 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
539 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
540 {
|
|
|
541 /* shouldn't get here, but just in case */
|
|
|
542 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
543 }
|
|
|
544 else
|
|
|
545 {
|
|
|
546 value = (int)
|
|
|
547 (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
|
548 + (((double)
|
|
|
549 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
550 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
551 * (data->slider_value -
|
|
|
552 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
|
553 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
554 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
|
555 }
|
|
|
556 }
|
|
|
557 else
|
|
|
558 {
|
|
|
559 /* We've dragged down; slide linearly from original position to
|
|
|
560 window-start=data.maximum, slider-value=data.maximum. */
|
|
|
561
|
|
|
562 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
|
563 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
|
564 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
|
565 {
|
|
|
566 /* avoid divide by zero */
|
|
|
567 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
|
568 }
|
|
|
569 else
|
|
|
570 {
|
|
|
571 value = (int)
|
|
|
572 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
|
573 + (((double)
|
|
|
574 (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
575 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
|
576 * (data->slider_value
|
|
|
577 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
|
578 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
|
579 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
|
580 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
|
581 }
|
|
|
582 }
|
|
|
583 #else
|
|
|
584 stupid_vertical_scrollbar_drag_hack = 0;
|
|
|
585 value = data->slider_value;
|
|
|
586 #endif
|
|
|
587
|
|
|
588 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
|
589 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
|
590 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
|
591 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
|
592
|
|
|
593 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
|
|
|
594 Fcons (win, make_int (value)));
|
|
|
595 }
|
|
|
596 break;
|
|
|
597
|
|
|
598 }
|
|
|
599 }
|
|
|
600
|
|
|
601 /*
|
|
|
602 * This is the only callback provided for horizontal scrollbars. It
|
|
|
603 * should be able to handle all of the scrollbar events in
|
|
|
604 * scroll_action (see lwlib.h). The client data will be of type
|
|
|
605 * scroll_event (see lwlib.h). */
|
|
|
606 static void
|
|
|
607 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
|
608 XtPointer client_data)
|
|
|
609 {
|
|
|
610 scroll_event *data = (scroll_event *) client_data;
|
|
|
611 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
|
612 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
|
613 Lisp_Object win, frame;
|
|
|
614 struct window_mirror *mirror;
|
|
|
615
|
|
|
616 if (!f)
|
|
|
617 return;
|
|
|
618
|
|
|
619 mirror = find_scrollbar_window_mirror (f, id);
|
|
442
|
620 if (!mirror)
|
|
|
621 return;
|
|
|
622
|
|
428
|
623 win = real_window (mirror, 1);
|
|
|
624
|
|
|
625 if (NILP (win))
|
|
|
626 return;
|
|
|
627 frame = WINDOW_FRAME (XWINDOW (win));
|
|
|
628
|
|
|
629 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
|
630 is called. #### Why??? */
|
|
|
631 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
|
632
|
|
|
633 switch (data->action)
|
|
|
634 {
|
|
|
635 case SCROLLBAR_LINE_UP:
|
|
|
636 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
|
|
|
637 break;
|
|
|
638 case SCROLLBAR_LINE_DOWN:
|
|
|
639 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
|
|
|
640 break;
|
|
|
641 case SCROLLBAR_PAGE_UP:
|
|
|
642 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
|
|
|
643 break;
|
|
|
644 case SCROLLBAR_PAGE_DOWN:
|
|
|
645 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
|
|
|
646 break;
|
|
|
647 case SCROLLBAR_TOP:
|
|
|
648 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
|
|
|
649 break;
|
|
|
650 case SCROLLBAR_BOTTOM:
|
|
|
651 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
|
|
|
652 break;
|
|
|
653 case SCROLLBAR_CHANGE:
|
|
|
654 inhibit_slider_size_change = 0;
|
|
|
655 break;
|
|
|
656 case SCROLLBAR_DRAG:
|
|
|
657 inhibit_slider_size_change = 1;
|
|
|
658 /* #### Fix the damn toolkit code so they all work the same way.
|
|
|
659 Lucid is the one mostly wrong.*/
|
|
|
660 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
|
661 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
|
662 (Fcons
|
|
|
663 (win, make_int (data->slider_value))));
|
|
|
664 #else
|
|
|
665 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
|
666 (Fcons
|
|
|
667 (win,
|
|
|
668 make_int (data->slider_value - 1))));
|
|
|
669 #endif
|
|
|
670 break;
|
|
|
671 default:
|
|
|
672 break;
|
|
|
673 }
|
|
|
674 }
|
|
|
675
|
|
|
676 static void
|
|
|
677 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
678 {
|
|
793
|
679 Lisp_Object window = wrap_window (w);
|
|
428
|
680
|
|
|
681 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
|
682 0, (Window) NULL);
|
|
|
683 }
|
|
|
684
|
|
|
685 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
686 directly from x_set_frame_properties in frame-x.c*/
|
|
|
687 void
|
|
|
688 x_update_frame_scrollbars (struct frame *f)
|
|
|
689 {
|
|
617
|
690 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window,
|
|
|
691 XWINDOW_MIRROR (f->root_mirror), 0, (Window) NULL);
|
|
428
|
692 }
|
|
|
693
|
|
|
694 #ifdef MEMORY_USAGE_STATS
|
|
|
695
|
|
|
696 static int
|
|
2286
|
697 x_compute_scrollbar_instance_usage (struct device *UNUSED (d),
|
|
428
|
698 struct scrollbar_instance *inst,
|
|
|
699 struct overhead_stats *ovstats)
|
|
|
700 {
|
|
|
701 int total = 0;
|
|
|
702
|
|
|
703 while (inst)
|
|
|
704 {
|
|
|
705 struct x_scrollbar_data *data =
|
|
|
706 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
|
707
|
|
3024
|
708 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
709 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
428
|
710 ovstats);
|
|
|
711 inst = inst->next;
|
|
|
712 }
|
|
|
713
|
|
|
714 return total;
|
|
|
715 }
|
|
|
716
|
|
|
717 #endif /* MEMORY_USAGE_STATS */
|
|
|
718
|
|
|
719
|
|
|
720 /************************************************************************/
|
|
|
721 /* initialization */
|
|
|
722 /************************************************************************/
|
|
|
723
|
|
|
724 void
|
|
|
725 console_type_create_scrollbar_x (void)
|
|
|
726 {
|
|
|
727 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
|
728 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
|
729 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
|
730 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
|
731 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
|
732 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
|
733 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
|
734 #ifdef MEMORY_USAGE_STATS
|
|
|
735 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
|
736 #endif /* MEMORY_USAGE_STATS */
|
|
|
737 }
|
|
|
738
|
|
|
739 void
|
|
|
740 reinit_vars_of_scrollbar_x (void)
|
|
|
741 {
|
|
|
742 stupid_vertical_scrollbar_drag_hack = 1;
|
|
|
743 }
|
|
|
744
|
|
|
745 void
|
|
|
746 vars_of_scrollbar_x (void)
|
|
|
747 {
|
|
|
748 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
|
749 Fprovide (intern ("lucid-scrollbars"));
|
|
|
750 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
|
751 Fprovide (intern ("motif-scrollbars"));
|
|
|
752 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
|
753 Fprovide (intern ("athena-scrollbars"));
|
|
|
754 #endif
|
|
|
755 }
|
