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225
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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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380
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3 Copyright (C) 1994 Amdahl Corporation.
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225
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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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398
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27 #include <limits.h>
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225
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28 #include "lisp.h"
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29
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30 #include "console-msw.h"
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276
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31 #include "events.h"
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225
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32 #include "frame.h"
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276
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33 #include "scrollbar-msw.h"
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34 #include "scrollbar.h"
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35 #include "specifier.h"
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225
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36 #include "window.h"
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37
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375
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38 /* We use a similar sort of vertical scrollbar drag hack for mswindows
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39 * scrollbars as is used for Motif or Lucid scrollbars under X.
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40 * We do character-based instead of line-based scrolling, which can mean that
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41 * without the hack it is impossible to drag to the end of a buffer. */
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42 #define VERTICAL_SCROLLBAR_DRAG_HACK
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43
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44 static int vertical_drag_in_progress = 0;
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227
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45
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225
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46 static void
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47 mswindows_create_scrollbar_instance (struct frame *f, int vertical,
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48 struct scrollbar_instance *sb)
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49 {
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50 int orientation;
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51
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52 sb->scrollbar_data = xnew_and_zero (struct mswindows_scrollbar_data);
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53
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54 if (vertical)
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55 orientation = SBS_VERT;
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56 else
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57 orientation = SBS_HORZ;
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58
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59 SCROLLBAR_MSW_HANDLE (sb) =
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60 CreateWindowEx(0, "SCROLLBAR", 0, orientation|WS_CHILD,
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61 CW_USEDEFAULT, CW_USEDEFAULT,
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62 CW_USEDEFAULT, CW_USEDEFAULT,
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63 FRAME_MSWINDOWS_HANDLE (f),
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64 NULL, NULL, NULL);
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375
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65 SCROLLBAR_MSW_INFO (sb).cbSize = sizeof(SCROLLINFO);
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225
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66 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL;
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67 GetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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68 &SCROLLBAR_MSW_INFO (sb));
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69 SetWindowLong (SCROLLBAR_MSW_HANDLE(sb), GWL_USERDATA, (LONG)sb);
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70
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71 #if 0
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72 {
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73 HWND h = SCROLLBAR_MSW_HANDLE (sb);
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74 int x = SetWindowLong (SCROLLBAR_MSW_HANDLE(sb), GWL_USERDATA, (LONG)sb);
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75 int y = GetLastError();
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76 struct scrollbar_instance *z = (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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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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87 if (sb->scrollbar_data)
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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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92 mswindows_release_scrollbar_instance (struct scrollbar_instance *sb)
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93 {
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94 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, 0);
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95 SCROLLBAR_MSW_SIZE (sb) = 0;
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96 }
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97
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98 #define UPDATE_POS_FIELD(field) \
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99 if (new_##field >= 0 && SCROLLBAR_MSW_DATA (sb)->field != new_##field) { \
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100 SCROLLBAR_MSW_DATA (sb)->field = new_##field; \
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101 pos_changed = 1; \
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102 }
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103
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104 static void
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105 mswindows_update_scrollbar_instance_values (struct window *w,
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106 struct scrollbar_instance *sb,
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107 int new_line_increment,
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108 int new_page_increment,
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109 int new_minimum, int new_maximum,
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110 int new_slider_size,
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111 int new_slider_position,
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112 int new_scrollbar_width,
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113 int new_scrollbar_height,
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114 int new_scrollbar_x,
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115 int new_scrollbar_y)
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116 {
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117 int pos_changed = 0;
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375
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118 int vert = GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE) & SBS_VERT;
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225
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119
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227
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120 #if 0
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121 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
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122 new_slider_size, new_slider_position,inhibit_slider_size_change);
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123 #endif
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124
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225
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125 /* These might be optimized, but since at least one will change at each
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126 call, it's probably not worth it. */
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227
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127 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
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128 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
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375
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129 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
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225
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130 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
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375
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131 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
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132 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
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227
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133 ? SIF_RANGE | SIF_POS
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134 : SIF_ALL | SIF_DISABLENOSCROLL);
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375
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135 #else
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136 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
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137
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138 /* Ignore XEmacs' requests to update the thumb position and size; they don't
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139 * bear any relation to reality because we're reporting made-up positions */
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140 if (!(vert && vertical_drag_in_progress))
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141 #endif
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142 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
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143 TRUE);
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225
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144
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145 UPDATE_POS_FIELD (scrollbar_x);
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146 UPDATE_POS_FIELD (scrollbar_y);
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147 UPDATE_POS_FIELD (scrollbar_width);
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148 UPDATE_POS_FIELD (scrollbar_height);
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149
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150 if (pos_changed)
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151 {
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152 MoveWindow(SCROLLBAR_MSW_HANDLE (sb),
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153 new_scrollbar_x, new_scrollbar_y,
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154 new_scrollbar_width, new_scrollbar_height,
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155 TRUE);
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156 }
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157 }
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158
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159 static void
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160 mswindows_update_scrollbar_instance_status (struct window *w,
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161 int active, int size,
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162 struct scrollbar_instance *sb)
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163 {
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269
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164 if (SCROLLBAR_MSW_SIZE (sb) != size)
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165 {
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166 SCROLLBAR_MSW_SIZE (sb) = size;
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167 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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168 SCROLLBAR_MSW_SIZE (sb));
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169 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
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170 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
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171 }
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225
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172 }
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173
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174 void
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175 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
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176 {
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177 struct frame *f;
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288
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178 Lisp_Object win, frame;
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225
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179 struct scrollbar_instance *sb;
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180 SCROLLINFO scrollinfo;
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227
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181 int vert = GetWindowLong (hwnd, GWL_STYLE) & SBS_VERT;
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375
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182 int value;
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225
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183
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184 sb = (struct scrollbar_instance *)GetWindowLong (hwnd, GWL_USERDATA);
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185 win = real_window (sb->mirror, 1);
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288
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186 frame = XWINDOW (win)->frame;
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187 f = XFRAME (frame);
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225
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188
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227
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189 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
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190 always be - any Windows is binary compatible backward with
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191 old programs */
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192
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225
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193 switch (code)
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194 {
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195 case SB_LINEDOWN:
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288
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196 mswindows_enqueue_misc_user_event
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197 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
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225
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198 break;
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199
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200 case SB_LINEUP:
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288
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201 mswindows_enqueue_misc_user_event
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202 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
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225
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203 break;
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204
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205 case SB_PAGEDOWN:
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288
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206 mswindows_enqueue_misc_user_event
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207 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
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208 vert ? Fcons (win, Qnil) : win);
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225
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209 break;
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210
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211 case SB_PAGEUP:
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288
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212 mswindows_enqueue_misc_user_event
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213 (frame,
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214 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
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215 vert ? Fcons (win, Qnil) : win);
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225
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216 break;
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217
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218 case SB_BOTTOM:
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288
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219 mswindows_enqueue_misc_user_event
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220 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
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225
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221 break;
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222
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223 case SB_TOP:
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288
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224 mswindows_enqueue_misc_user_event
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225 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
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225
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226 break;
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227
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228 case SB_THUMBTRACK:
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229 case SB_THUMBPOSITION:
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227
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230 scrollinfo.cbSize = sizeof(SCROLLINFO);
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375
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231 scrollinfo.fMask = SIF_ALL;
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227
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232 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
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375
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233 vertical_drag_in_progress = vert;
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234 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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235 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
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236 /* new buffer position =
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237 * buffer position at start of drag +
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238 * ((text remaining in buffer at start of drag) *
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239 * (amount that the thumb has been moved) /
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240 * (space that remained past end of the thumb at start of drag)) */
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241 value = (int)
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242 (scrollinfo.nPos
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243 + (((double)
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244 (scrollinfo.nMax - scrollinfo.nPos)
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245 * (scrollinfo.nTrackPos - scrollinfo.nPos))
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246 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
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247 - 2; /* ensure that the last line doesn't disappear off screen */
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248 else
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249 #endif
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250 value = scrollinfo.nTrackPos;
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288
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251 mswindows_enqueue_misc_user_event
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252 (frame,
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253 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
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375
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254 Fcons (win, make_int (value)));
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255 break;
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256
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257 case SB_ENDSCROLL:
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258 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
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259 if (vertical_drag_in_progress)
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260 /* User has just dropped the thumb - finally update it */
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261 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
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262 &SCROLLBAR_MSW_INFO (sb), TRUE);
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263 #endif
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264 vertical_drag_in_progress = 0;
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225
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265 break;
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266 }
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267 }
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268
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398
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269 static int
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270 can_scroll(struct scrollbar_instance* scrollbar)
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271 {
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272 return scrollbar != NULL
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273 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
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274 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
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275 }
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276
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277 int
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278 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta)
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279 {
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280 int hasVertBar, hasHorzBar; /* Indicates prescence of scroll bars */
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281 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
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282
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283 /* Find the currently selected window */
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284 Lisp_Object win = FRAME_SELECTED_WINDOW (XFRAME (frame));
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285 struct window* w = XWINDOW (win);
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286 struct window_mirror* mirror = find_window_mirror (w);
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287
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288 /* Check that there is something to scroll */
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289 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
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290 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
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291 if (!hasVertBar && !hasHorzBar)
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292 return FALSE;
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293
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294 /* No support for panning and zooming, so ignore */
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295 if (keys & (MK_SHIFT | MK_CONTROL))
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296 return FALSE;
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297
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298 /* Get the number of lines per wheel delta */
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299 SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
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300
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301 /* Calculate the amount to scroll */
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302 if (wheelScrollLines == WHEEL_PAGESCROLL)
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303 {
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304 /* Scroll by a page */
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305 Lisp_Object function;
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306 if (hasVertBar)
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307 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
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308 else
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309 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
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310 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
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311 }
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312 else /* Scroll by a number of lines */
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313 {
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314 /* Calc the number of lines to scroll */
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315 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
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316
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317 /* Do the scroll */
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318 Lisp_Object function;
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319 if (hasVertBar)
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320 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
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321 else
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322 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
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323 if (toScroll < 0)
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324 toScroll = -toScroll;
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325 while (toScroll--)
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326 mswindows_enqueue_misc_user_event (frame, function, win);
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327 }
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328
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329 return TRUE;
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330 }
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331
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225
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332 #ifdef MEMORY_USAGE_STATS
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333
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334 static int
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335 mswindows_compute_scrollbar_instance_usage (struct device *d,
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336 struct scrollbar_instance *inst,
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337 struct overhead_stats *ovstats)
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338 {
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339 int total = 0;
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340
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341 while (inst)
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342 {
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343 struct mswindows_scrollbar_data *data =
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344 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
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345
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346 total += malloced_storage_size (data, sizeof (*data), ovstats);
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347 inst = inst->next;
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348 }
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349
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350 return total;
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351 }
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352
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353 #endif /* MEMORY_USAGE_STATS */
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276
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354
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355 /************************************************************************/
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356 /* Device-specific ghost specifiers initialization */
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357 /************************************************************************/
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225
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358
|
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276
|
359 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics, 1, 1, 0, /*
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360 */
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361 (locale))
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362 {
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363 if (DEVICEP (locale))
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364 {
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365 add_spec_to_ghost_specifier (Vscrollbar_width,
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366 make_int (GetSystemMetrics (SM_CXVSCROLL)),
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367 locale, Qmswindows, Qnil);
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368 add_spec_to_ghost_specifier (Vscrollbar_height,
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369 make_int (GetSystemMetrics (SM_CYHSCROLL)),
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370 locale, Qmswindows, Qnil);
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|
|
371 }
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|
372 return Qnil;
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|
|
373 }
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374
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375
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225
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376 /************************************************************************/
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|
|
377 /* initialization */
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|
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378 /************************************************************************/
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379
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380 void
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381 console_type_create_scrollbar_mswindows (void)
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|
|
382 {
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383 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
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384 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
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385 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
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386 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
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387 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
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388 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
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389 #ifdef MEMORY_USAGE_STATS
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390 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
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391 #endif
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392 }
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393
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394 void
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276
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395 syms_of_scrollbar_mswindows(void)
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396 {
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397 DEFSUBR (Fmswindows_init_scrollbar_metrics);
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398 }
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399
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400 void
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225
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401 vars_of_scrollbar_mswindows(void)
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402 {
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403 Fprovide (intern ("mswindows-scrollbars"));
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404 }
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405
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