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428
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1 /* scrollbar implementation -- mswindows 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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26 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "console-msw.h"
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30 #include "events.h"
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31 #include "frame.h"
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32 #include "scrollbar-msw.h"
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33 #include "scrollbar.h"
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34 #include "specifier.h"
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35 #include "window.h"
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36
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37 /* We use a similar sort of vertical scrollbar drag hack for mswindows
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38 * scrollbars as is used for Motif or Lucid scrollbars under X.
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39 * We do character-based instead of line-based scrolling, which can mean that
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40 * without the hack it is impossible to drag to the end of a buffer. */
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41 #define VERTICAL_SCROLLBAR_DRAG_HACK
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42
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43 static int vertical_drag_in_progress = 0;
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44
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45 static void
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46 mswindows_create_scrollbar_instance (struct frame *f, int vertical,
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47 struct scrollbar_instance *sb)
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48 {
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49 int orientation;
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442
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50
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428
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51 sb->scrollbar_data = xnew_and_zero (struct mswindows_scrollbar_data);
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442
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52
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428
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53 if (vertical)
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54 orientation = SBS_VERT;
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55 else
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56 orientation = SBS_HORZ;
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442
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57
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428
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58 SCROLLBAR_MSW_HANDLE (sb) =
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546
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59 CreateWindowEx (0, "SCROLLBAR", 0, orientation|WS_CHILD,
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60 CW_USEDEFAULT, CW_USEDEFAULT,
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61 CW_USEDEFAULT, CW_USEDEFAULT,
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62 FRAME_MSWINDOWS_HANDLE (f),
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63 NULL, NULL, NULL);
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64 SCROLLBAR_MSW_INFO (sb).cbSize = sizeof (SCROLLINFO);
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428
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65 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL;
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66 GetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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67 &SCROLLBAR_MSW_INFO (sb));
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546
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68 SetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_USERDATA, (LONG) sb);
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428
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69
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70 #if 0
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71 {
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546
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72 HWND h = SCROLLBAR_MSW_HANDLE (sb);
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73 int x = SetWindowLong (SCROLLBAR_MSW_HANDLE(sb), GWL_USERDATA, (LONG)sb);
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74 int y = GetLastError();
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75 struct scrollbar_instance *z =
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76 (struct scrollbar_instance *)GetWindowLong (SCROLLBAR_MSW_HANDLE(sb),
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77 GWL_USERDATA);
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78 *z = *z;
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428
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79 }
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80 #endif
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81 }
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82
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83 static void
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84 mswindows_free_scrollbar_instance (struct scrollbar_instance *sb)
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85 {
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86 DestroyWindow (SCROLLBAR_MSW_HANDLE (sb));
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442
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87 if (sb->scrollbar_data)
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428
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88 xfree (sb->scrollbar_data);
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89 }
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90
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91 static void
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611
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92 unshow_that_mofo (void *handle)
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93 {
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94 ShowScrollBar ((HWND) handle, SB_CTL, 0);
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95 }
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96
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97 static void
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428
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98 mswindows_release_scrollbar_instance (struct scrollbar_instance *sb)
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99 {
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611
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100 if (gc_in_progress)
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101 /* #### way bogus! need to remove the offending call.
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102 see mark_redisplay(). */
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103 register_post_gc_action (unshow_that_mofo,
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104 (void *) SCROLLBAR_MSW_HANDLE (sb));
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105 else
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106 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, 0);
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428
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107 SCROLLBAR_MSW_SIZE (sb) = 0;
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108 }
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109
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110 #define UPDATE_POS_FIELD(field) \
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111 if (new_##field >= 0 && SCROLLBAR_MSW_DATA (sb)->field != new_##field) { \
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112 SCROLLBAR_MSW_DATA (sb)->field = new_##field; \
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113 pos_changed = 1; \
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114 }
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115
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116 static void
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117 mswindows_update_scrollbar_instance_values (struct window *w,
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118 struct scrollbar_instance *sb,
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119 int new_line_increment,
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120 int new_page_increment,
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121 int new_minimum, int new_maximum,
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122 int new_slider_size,
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123 int new_slider_position,
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124 int new_scrollbar_width,
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125 int new_scrollbar_height,
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126 int new_scrollbar_x,
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127 int new_scrollbar_y)
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128 {
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129 int pos_changed = 0;
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130 int vert = GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE) & SBS_VERT;
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131
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132 #if 0
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133 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
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134 new_slider_size, new_slider_position,inhibit_slider_size_change);
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135 #endif
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136
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137 /* These might be optimized, but since at least one will change at each
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138 call, it's probably not worth it. */
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139 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
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140 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
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141 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
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142 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
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143 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
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144 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
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145 ? SIF_RANGE | SIF_POS
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146 : SIF_ALL | SIF_DISABLENOSCROLL);
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147 #else
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148 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
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149
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150 /* Ignore XEmacs' requests to update the thumb position and size; they don't
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151 * bear any relation to reality because we're reporting made-up positions */
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152 if (!(vert && vertical_drag_in_progress))
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153 #endif
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154 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
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155 TRUE);
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156
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157 UPDATE_POS_FIELD (scrollbar_x);
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158 UPDATE_POS_FIELD (scrollbar_y);
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159 UPDATE_POS_FIELD (scrollbar_width);
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160 UPDATE_POS_FIELD (scrollbar_height);
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161
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442
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162 if (pos_changed)
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428
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163 {
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164 MoveWindow(SCROLLBAR_MSW_HANDLE (sb),
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165 new_scrollbar_x, new_scrollbar_y,
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166 new_scrollbar_width, new_scrollbar_height,
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167 TRUE);
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168 }
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169 }
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170
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171 static void
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172 mswindows_update_scrollbar_instance_status (struct window *w,
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173 int active, int size,
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174 struct scrollbar_instance *sb)
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175 {
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176 if (SCROLLBAR_MSW_SIZE (sb) != size)
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177 {
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178 SCROLLBAR_MSW_SIZE (sb) = size;
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179 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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180 SCROLLBAR_MSW_SIZE (sb));
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181 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
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182 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
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183 }
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184 }
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185
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186 void
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187 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
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188 {
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189 struct frame *f;
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190 Lisp_Object win, frame;
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191 struct scrollbar_instance *sb;
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192 SCROLLINFO scrollinfo;
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193 int vert = GetWindowLong (hwnd, GWL_STYLE) & SBS_VERT;
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194 int value;
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195
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546
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196 sb = (struct scrollbar_instance *) GetWindowLong (hwnd, GWL_USERDATA);
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197 if (!sb)
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198 {
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199 frame = mswindows_find_frame (hwnd);
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200 f = XFRAME (frame);
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201 win = FRAME_SELECTED_WINDOW (f);
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202 }
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203 else
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204 {
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205 win = real_window (sb->mirror, 0);
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206 frame = XWINDOW (win)->frame;
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207 f = XFRAME (frame);
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208 }
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428
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209
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210 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
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442
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211 always be - any Windows is binary compatible backward with
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428
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212 old programs */
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213
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214 switch (code)
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215 {
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216 case SB_LINEDOWN:
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217 mswindows_enqueue_misc_user_event
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218 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
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219 break;
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442
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220
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428
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221 case SB_LINEUP:
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222 mswindows_enqueue_misc_user_event
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223 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
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224 break;
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442
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225
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428
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226 case SB_PAGEDOWN:
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227 mswindows_enqueue_misc_user_event
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228 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
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229 vert ? Fcons (win, Qnil) : win);
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230 break;
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231
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232 case SB_PAGEUP:
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233 mswindows_enqueue_misc_user_event
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234 (frame,
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235 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
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236 vert ? Fcons (win, Qnil) : win);
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237 break;
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442
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238
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428
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239 case SB_BOTTOM:
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240 mswindows_enqueue_misc_user_event
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241 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
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242 break;
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243
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244 case SB_TOP:
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245 mswindows_enqueue_misc_user_event
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246 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
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247 break;
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248
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249 case SB_THUMBTRACK:
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250 case SB_THUMBPOSITION:
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251 scrollinfo.cbSize = sizeof(SCROLLINFO);
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252 scrollinfo.fMask = SIF_ALL;
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253 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
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254 vertical_drag_in_progress = vert;
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255 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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256 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
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257 /* new buffer position =
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258 * buffer position at start of drag +
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259 * ((text remaining in buffer at start of drag) *
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260 * (amount that the thumb has been moved) /
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261 * (space that remained past end of the thumb at start of drag)) */
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262 value = (int)
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263 (scrollinfo.nPos
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264 + (((double)
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265 (scrollinfo.nMax - scrollinfo.nPos)
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266 * (scrollinfo.nTrackPos - scrollinfo.nPos))
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267 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
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268 - 2; /* ensure that the last line doesn't disappear off screen */
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269 else
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270 #endif
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271 value = scrollinfo.nTrackPos;
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272 mswindows_enqueue_misc_user_event
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273 (frame,
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274 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
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275 Fcons (win, make_int (value)));
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276 break;
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277
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278 case SB_ENDSCROLL:
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279 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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546
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280 if (vertical_drag_in_progress && sb)
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428
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281 /* User has just dropped the thumb - finally update it */
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282 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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283 &SCROLLBAR_MSW_INFO (sb), TRUE);
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284 #endif
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285 vertical_drag_in_progress = 0;
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286 break;
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287 }
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288 }
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289
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290 static int
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464
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291 can_scroll (struct scrollbar_instance* scrollbar)
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428
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292 {
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293 return scrollbar != NULL
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294 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
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295 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
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296 }
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297
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298 int
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464
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299 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta,
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300 POINTS where)
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428
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301 {
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442
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302 int hasVertBar, hasHorzBar; /* Indicates presence of scroll bars */
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428
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303 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
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464
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304 Lisp_Object win;
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305 struct window_mirror *mirror;
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306 POINT donde_esta;
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428
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307
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464
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308 donde_esta.x = where.x;
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309 donde_esta.y = where.y;
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310
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311 ScreenToClient (FRAME_MSWINDOWS_HANDLE (XFRAME (frame)), &donde_esta);
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312
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313 /* Find the window to scroll */
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314 {
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315 int mene, _mene, tekel, upharsin;
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316 Bufpos mens, sana;
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317 Charcount in;
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318 Lisp_Object corpore, sano;
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319 struct window *needle_in_haystack;
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320
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321 pixel_to_glyph_translation (XFRAME (frame), donde_esta.x, donde_esta.y,
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322 &mene, &_mene, &tekel, &upharsin,
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323 &needle_in_haystack,
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324 &mens, &sana, &in, &corpore, &sano);
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325
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326 if (needle_in_haystack)
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|
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327 {
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328 XSETWINDOW (win, needle_in_haystack);
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329 }
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330 else
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331 {
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332 win = FRAME_SELECTED_WINDOW (XFRAME (frame));
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|
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333 needle_in_haystack = XWINDOW (win);
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|
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334 }
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335
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|
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336 mirror = find_window_mirror (needle_in_haystack);
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|
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337 }
|
|
428
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338
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|
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339 /* Check that there is something to scroll */
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340 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
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|
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341 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
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|
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342 if (!hasVertBar && !hasHorzBar)
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|
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343 return FALSE;
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|
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344
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|
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345 /* No support for panning and zooming, so ignore */
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|
|
346 if (keys & (MK_SHIFT | MK_CONTROL))
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|
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347 return FALSE;
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|
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348
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|
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349 /* Get the number of lines per wheel delta */
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|
|
350 SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
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|
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351
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|
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352 /* Calculate the amount to scroll */
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|
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353 if (wheelScrollLines == WHEEL_PAGESCROLL)
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|
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354 {
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355 /* Scroll by a page */
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|
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356 Lisp_Object function;
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357 if (hasVertBar)
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358 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
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|
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359 else
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360 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
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|
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361 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
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|
|
362 }
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|
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363 else /* Scroll by a number of lines */
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|
|
364 {
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|
|
365 /* Calc the number of lines to scroll */
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|
|
366 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
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|
|
367
|
|
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368 /* Do the scroll */
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|
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369 Lisp_Object function;
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370 if (hasVertBar)
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371 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
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|
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372 else
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|
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373 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
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|
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374 if (toScroll < 0)
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|
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375 toScroll = -toScroll;
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|
|
376 while (toScroll--)
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|
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377 mswindows_enqueue_misc_user_event (frame, function, win);
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|
|
378 }
|
|
|
379
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|
|
380 return TRUE;
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|
|
381 }
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|
|
382
|
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383 #ifdef MEMORY_USAGE_STATS
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384
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385 static int
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386 mswindows_compute_scrollbar_instance_usage (struct device *d,
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387 struct scrollbar_instance *inst,
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388 struct overhead_stats *ovstats)
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389 {
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390 int total = 0;
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391
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392 while (inst)
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393 {
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394 struct mswindows_scrollbar_data *data =
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395 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
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396
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397 total += malloced_storage_size (data, sizeof (*data), ovstats);
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398 inst = inst->next;
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399 }
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400
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401 return total;
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402 }
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403
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404 #endif /* MEMORY_USAGE_STATS */
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405
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406 /************************************************************************/
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407 /* Device-specific ghost specifiers initialization */
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408 /************************************************************************/
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409
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410 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics, 1, 1, 0, /*
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411 */
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412 (locale))
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413 {
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414 if (DEVICEP (locale))
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415 {
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416 add_spec_to_ghost_specifier (Vscrollbar_width,
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417 make_int (GetSystemMetrics (SM_CXVSCROLL)),
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418 locale, Qmswindows, Qnil);
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419 add_spec_to_ghost_specifier (Vscrollbar_height,
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420 make_int (GetSystemMetrics (SM_CYHSCROLL)),
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421 locale, Qmswindows, Qnil);
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422 }
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423 return Qnil;
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424 }
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425
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426
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427 /************************************************************************/
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428 /* initialization */
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429 /************************************************************************/
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430
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431 void
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432 console_type_create_scrollbar_mswindows (void)
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433 {
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434 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
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435 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
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436 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
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437 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
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438 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
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439 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
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440 #ifdef MEMORY_USAGE_STATS
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441 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
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442 #endif
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443 }
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444
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445 void
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446 syms_of_scrollbar_mswindows(void)
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447 {
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448 DEFSUBR (Fmswindows_init_scrollbar_metrics);
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449 }
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450
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451 void
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452 vars_of_scrollbar_mswindows(void)
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453 {
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454 Fprovide (intern ("mswindows-scrollbars"));
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455 }
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456
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