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2168
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1 /* scrollbar implementation -- GTK interface.
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462
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994 Amdhal 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 /* Gtk version by William M. Perry */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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872
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30 #include "frame-impl.h"
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31 #include "window.h"
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32
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33 #include "console-gtk-impl.h"
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462
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34 #include "glyphs-gtk.h"
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35 #include "scrollbar-gtk.h"
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36
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37 static gboolean scrollbar_cb (GtkAdjustment *adj, gpointer user_data);
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38
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39 /* Used to prevent changing the size of the slider while drag
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40 scrolling, under Motif. This is necessary because the Motif
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41 scrollbar is incredibly stupid about updating the slider and causes
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42 lots of flicker if it is done too often. */
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43 static int inhibit_slider_size_change;
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44
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45 static int vertical_drag_in_progress;
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46
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47
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48 /* A device method. */
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49 static int
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50 gtk_inhibit_scrollbar_slider_size_change (void)
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51 {
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52 return inhibit_slider_size_change;
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53 }
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54
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55 /* A device method. */
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56 static void
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57 gtk_free_scrollbar_instance (struct scrollbar_instance *instance)
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58 {
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3482
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59 if (instance->scrollbar_data)
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462
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60 {
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3482
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61 if (SCROLLBAR_GTK_WIDGET (instance))
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62 {
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63 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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64 gtk_widget_destroy (SCROLLBAR_GTK_WIDGET (instance));
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65 }
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66
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67 xfree (instance->scrollbar_data, void *);
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462
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68 }
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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 gtk_release_scrollbar_instance (struct scrollbar_instance *instance)
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74 {
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75 /* It won't hurt to hide it all the time, will it? */
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76 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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77 }
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78
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79 static gboolean
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2286
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80 scrollbar_drag_hack_cb (GtkWidget *UNUSED (w), GdkEventButton *UNUSED (ev),
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81 gpointer v)
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462
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82 {
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83 vertical_drag_in_progress = (int) v;
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84 inhibit_slider_size_change = (int) v;
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85 return (FALSE);
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86 }
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87
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88 /* A device method. */
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89 static void
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90 gtk_create_scrollbar_instance (struct frame *f, int vertical,
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91 struct scrollbar_instance *instance)
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92 {
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93 GtkAdjustment *adj = GTK_ADJUSTMENT (gtk_adjustment_new (0,0,0,0,0,0));
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94 GtkScrollbar *sb = NULL;
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95
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96 /* initialize the X specific data section. */
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97 instance->scrollbar_data = xnew_and_zero (struct gtk_scrollbar_data);
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98
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99 SCROLLBAR_GTK_ID (instance) = new_gui_id ();
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100 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (instance) = -1;
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101 SCROLLBAR_GTK_LAST_VALUE (instance) = adj->value;
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102
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2168
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103 gtk_object_set_data (GTK_OBJECT (adj), GTK_DATA_GUI_IDENTIFIER, (void *) SCROLLBAR_GTK_ID (instance));
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104 gtk_object_set_data (GTK_OBJECT (adj), GTK_DATA_FRAME_IDENTIFIER, f);
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462
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105
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106 sb = GTK_SCROLLBAR (vertical ? gtk_vscrollbar_new (adj) : gtk_hscrollbar_new (adj));
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107 SCROLLBAR_GTK_WIDGET (instance) = GTK_WIDGET (sb);
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108
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109 gtk_signal_connect (GTK_OBJECT (adj),"value-changed",
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110 GTK_SIGNAL_FUNC (scrollbar_cb), (gpointer) vertical);
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111
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112 gtk_signal_connect (GTK_OBJECT (sb), "button-press-event",
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113 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 1);
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114 gtk_signal_connect (GTK_OBJECT (sb), "button-release-event",
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115 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 0);
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116
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117 gtk_fixed_put (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)), SCROLLBAR_GTK_WIDGET (instance), 0, 0);
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525
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118
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119 /*
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120 ** With gtk version > 1.2.8 the scrollbars in gtk-xemacs and xemacs
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121 ** from CVS are invisible. In fact they are not invisible but very
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122 ** thin (0 pixels wide). This is so, because the new gtk code does
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123 ** not call gtk_widget_request_size() on the newly created
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124 ** scrollbars anymore. this change was done to allow the theme
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125 ** engines to manipulate the scrollbar width. This patch calls
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126 ** gtk_widget_request_size with the newly created scollbars. Maybe
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127 ** it is better to postpone this call just before the
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128 ** gtk_widget_show() call is done on the scrolbar.
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129 */
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130 gtk_widget_size_request(GTK_WIDGET(sb), &(GTK_WIDGET(sb)->requisition));
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131
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462
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132 gtk_widget_hide (SCROLLBAR_GTK_WIDGET (instance));
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133 }
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134
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135 #define UPDATE_DATA_FIELD(field) \
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136 if (new_##field >= 0 && \
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137 SCROLLBAR_GTK_POS_DATA (inst).field != new_##field) { \
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138 SCROLLBAR_GTK_POS_DATA (inst).field = new_##field; \
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139 inst->scrollbar_instance_changed = 1; \
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140 }
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141
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142 /* A device method. */
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143 /* #### The -1 check is such a hack. */
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144 static void
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145 gtk_update_scrollbar_instance_values (struct window *w,
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146 struct scrollbar_instance *inst,
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147 int new_line_increment,
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148 int new_page_increment,
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149 int new_minimum, int new_maximum,
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150 int new_slider_size,
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151 int new_slider_position,
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152 int new_scrollbar_width,
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153 int new_scrollbar_height,
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154 int new_scrollbar_x, int new_scrollbar_y)
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155 {
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156 UPDATE_DATA_FIELD (line_increment);
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157 UPDATE_DATA_FIELD (page_increment);
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158 UPDATE_DATA_FIELD (minimum);
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159 UPDATE_DATA_FIELD (maximum);
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160 UPDATE_DATA_FIELD (slider_size);
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161 UPDATE_DATA_FIELD (slider_position);
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162 UPDATE_DATA_FIELD (scrollbar_width);
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163 UPDATE_DATA_FIELD (scrollbar_height);
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164 UPDATE_DATA_FIELD (scrollbar_x);
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165 UPDATE_DATA_FIELD (scrollbar_y);
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166
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167 if (w && !vertical_drag_in_progress)
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168 {
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169 int new_vov = SCROLLBAR_GTK_POS_DATA (inst).slider_position;
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170 int new_vows = marker_position (w->start[CURRENT_DISP]);
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171
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172 if (SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) != new_vov)
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173 {
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174 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) = new_vov;
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175 inst->scrollbar_instance_changed = 1;
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176 }
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177 if (SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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178 {
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179 SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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180 inst->scrollbar_instance_changed = 1;
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181 }
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182 }
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183 }
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184
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185 /* Used by gtk_update_scrollbar_instance_status. */
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186 static void
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187 update_one_widget_scrollbar_pointer (struct window *w, GtkWidget *wid)
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188 {
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189 if (!wid->window)
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190 gtk_widget_realize (wid);
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191
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192 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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193 {
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194 gdk_window_set_cursor (GET_GTK_WIDGET_WINDOW (wid),
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195 XIMAGE_INSTANCE_GTK_CURSOR (w->scrollbar_pointer));
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196 gdk_flush ();
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197 }
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198 }
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199
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200 /* A device method. */
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201 static void
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202 gtk_update_scrollbar_instance_status (struct window *w, int active, int size,
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203 struct scrollbar_instance *instance)
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204 {
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205 struct frame *f = XFRAME (w->frame);
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206 GtkWidget *wid = SCROLLBAR_GTK_WIDGET (instance);
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207 gboolean managed = GTK_WIDGET_MAPPED (wid);
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208
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209 if (active && size)
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210 {
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211 if (instance->scrollbar_instance_changed)
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212 {
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213 /* Need to set the height, width, and position of the widget */
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214 GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (wid));
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215 scrollbar_values *pos_data = & SCROLLBAR_GTK_POS_DATA (instance);
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216 int modified_p = 0;
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217
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218 /* We do not want to update the size all the time if we can
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219 help it. This cuts down on annoying flicker.
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220 */
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221 if ((wid->allocation.width != pos_data->scrollbar_width) ||
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222 (wid->allocation.height != pos_data->scrollbar_height))
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223 {
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224 gtk_widget_set_usize (wid,
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225 pos_data->scrollbar_width,
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226 pos_data->scrollbar_height);
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2195
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227
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228 /*
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229 UGLY! UGLY! UGLY! Changes to wid->allocation are queued and
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230 not performed until the GTK event loop. However, when the
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231 fontlock progress bar is run, the vertical scrollbar's height
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232 is change and then changed back before events are again
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233 processed. This means that the change back is not seen and
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234 the scrollbar is left too short. Fix this by making the
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235 change manually so the test above sees the change. This does
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236 not seem to cause problems in other cases.
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237 */
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238
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239 wid->allocation.width = pos_data->scrollbar_width;
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240 wid->allocation.height = pos_data->scrollbar_height;
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241
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462
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242 modified_p = 1;
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243 }
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244
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245 /* Ditto for the x/y position. */
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246 if ((wid->allocation.x != pos_data->scrollbar_x) ||
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247 (wid->allocation.y != pos_data->scrollbar_y))
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248 {
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249 gtk_fixed_move (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
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250 wid,
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251 pos_data->scrollbar_x,
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252 pos_data->scrollbar_y);
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2195
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253
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254 /*
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255 UGLY! UGLY! UGLY! Changes to wid->allocation are queued and
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256 not performed until the GTK event loop. However, when the
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257 fontlock progress bar is run, the horizontal scrollbar's
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258 position is change and then changed back before events are
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259 again processed. This means that the change back is not seen
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260 and the scrollbar is left in the wrong position. Fix this by
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261 making the change manually so the test above sees the change.
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262 This does not seem to cause problems in other cases.
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263 */
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264
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265 wid->allocation.x = pos_data->scrollbar_x;
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266 wid->allocation.y = pos_data->scrollbar_y;
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267
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462
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268 modified_p = 1;
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269 }
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270
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271 adj->lower = pos_data->minimum;
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272 adj->upper = pos_data->maximum;
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273 adj->page_increment = pos_data->slider_size + 1;
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274 adj->step_increment = w->max_line_len - 1;
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275 adj->page_size = pos_data->slider_size + 1;
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276 adj->value = pos_data->slider_position;
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277
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278 /* But, if we didn't resize or move the scrollbar, the
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279 widget will not get redrawn correctly when the user
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280 scrolls around in the XEmacs frame manually. So we
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281 update the slider manually here.
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282 */
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283 if (!modified_p)
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284 gtk_range_slider_update (GTK_RANGE (wid));
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285
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286 instance->scrollbar_instance_changed = 0;
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287 }
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288
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289 if (!managed)
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290 {
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291 gtk_widget_show (wid);
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292 update_one_widget_scrollbar_pointer (w, wid);
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293 }
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294 }
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295 else if (managed)
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296 {
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297 gtk_widget_hide (wid);
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298 }
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299 }
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300
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301 enum gtk_scrollbar_loop
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302 {
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303 GTK_FIND_SCROLLBAR_WINDOW_MIRROR,
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304 GTK_SET_SCROLLBAR_POINTER,
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305 GTK_WINDOW_IS_SCROLLBAR,
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306 GTK_UPDATE_FRAME_SCROLLBARS
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307 };
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308
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309 static struct window_mirror *
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310 gtk_scrollbar_loop (enum gtk_scrollbar_loop type, Lisp_Object window,
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311 struct window_mirror *mir,
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312 GUI_ID id, GdkWindow *x_win)
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313 {
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314 struct window_mirror *retval = NULL;
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315
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316 while (mir)
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317 {
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318 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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319 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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320 struct window *w = XWINDOW (window);
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321
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322 if (mir->vchild)
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323 retval = gtk_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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324 else if (mir->hchild)
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325 retval = gtk_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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326 if (retval)
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327 return retval;
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328
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329 if (hinstance || vinstance)
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330 {
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331 switch (type)
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332 {
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333 case GTK_FIND_SCROLLBAR_WINDOW_MIRROR:
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334 if ((vinstance && SCROLLBAR_GTK_ID (vinstance) == id) ||
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335 (hinstance && SCROLLBAR_GTK_ID (hinstance) == id))
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336 return mir;
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337 break;
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338 case GTK_UPDATE_FRAME_SCROLLBARS:
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339 if (!mir->vchild && !mir->hchild)
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340 update_window_scrollbars (w, mir, 1, 0);
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341 break;
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342 case GTK_SET_SCROLLBAR_POINTER:
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343 if (!mir->vchild && !mir->hchild)
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344 {
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345 GtkWidget *widget;
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346
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347 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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348 if (widget && GTK_WIDGET_MAPPED (widget))
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349 update_one_widget_scrollbar_pointer (w, widget);
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350
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351 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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352 if (widget && GTK_WIDGET_MAPPED (widget))
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353 update_one_widget_scrollbar_pointer (w, widget);
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354 }
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355 break;
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356 case GTK_WINDOW_IS_SCROLLBAR:
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357 if (!mir->vchild && !mir->hchild)
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358 {
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359 GtkWidget *widget;
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360
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361 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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362 if (widget && GTK_WIDGET_MAPPED (widget) &&
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363 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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364 return (struct window_mirror *) 1;
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365
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366 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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367 if (widget && GTK_WIDGET_MAPPED (widget) &&
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368 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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369 return (struct window_mirror *) 1;
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370 }
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371 break;
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372 default:
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2500
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373 ABORT ();
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462
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374 }
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375 }
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376
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377 mir = mir->next;
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378 window = w->next;
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379 }
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380
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381 return NULL;
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382 }
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383
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384 /* Used by callbacks. */
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385 static struct window_mirror *
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386 find_scrollbar_window_mirror (struct frame *f, GUI_ID id)
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|
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387 {
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|
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388 if (f->mirror_dirty)
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389 update_frame_window_mirror (f);
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|
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390 return gtk_scrollbar_loop (GTK_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
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617
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391 XWINDOW_MIRROR (f->root_mirror), id,
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392 (GdkWindow *) NULL);
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462
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393 }
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394
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395 static gboolean
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396 scrollbar_cb (GtkAdjustment *adj, gpointer user_data)
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|
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397 {
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|
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398 /* This function can GC */
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399 int vertical = (int) user_data;
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2168
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400 struct frame *f = (struct frame*) gtk_object_get_data (GTK_OBJECT (adj), GTK_DATA_FRAME_IDENTIFIER);
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617
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401 struct scrollbar_instance *instance;
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2168
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402 GUI_ID id = (GUI_ID) gtk_object_get_data (GTK_OBJECT (adj), GTK_DATA_GUI_IDENTIFIER);
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462
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403 Lisp_Object win, frame;
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404 struct window_mirror *mirror;
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405 Lisp_Object event_type = Qnil;
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406 Lisp_Object event_data = Qnil;
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407
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408 if (!f)
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409 return(FALSE);
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410
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411 mirror = find_scrollbar_window_mirror (f, id);
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|
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412 if (!mirror)
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413 return(FALSE);
|
|
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414
|
|
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415 win = real_window (mirror, 1);
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|
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416
|
|
|
417 if (NILP (win))
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|
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418 return(FALSE);
|
|
|
419 instance = vertical ? mirror->scrollbar_vertical_instance : mirror->scrollbar_horizontal_instance;
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|
|
420 frame = WINDOW_FRAME (XWINDOW (win));
|
|
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421
|
|
|
422 inhibit_slider_size_change = 0;
|
|
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423 switch (GTK_RANGE (SCROLLBAR_GTK_WIDGET (instance))->scroll_type)
|
|
|
424 {
|
|
|
425 case GTK_SCROLL_PAGE_BACKWARD:
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|
|
426 event_type = vertical ? Qscrollbar_page_up : Qscrollbar_page_left;
|
|
|
427 event_data = Fcons (win, Qnil);
|
|
|
428 break;
|
|
|
429 case GTK_SCROLL_PAGE_FORWARD:
|
|
|
430 event_type = vertical ? Qscrollbar_page_down : Qscrollbar_page_right;
|
|
|
431 event_data = Fcons (win, Qnil);
|
|
|
432 break;
|
|
|
433 case GTK_SCROLL_STEP_FORWARD:
|
|
|
434 event_type = vertical ? Qscrollbar_line_down : Qscrollbar_char_right;
|
|
|
435 event_data = win;
|
|
|
436 break;
|
|
|
437 case GTK_SCROLL_STEP_BACKWARD:
|
|
|
438 event_type = vertical ? Qscrollbar_line_up : Qscrollbar_char_left;
|
|
|
439 event_data = win;
|
|
|
440 break;
|
|
|
441 case GTK_SCROLL_NONE:
|
|
|
442 case GTK_SCROLL_JUMP:
|
|
|
443 inhibit_slider_size_change = 1;
|
|
|
444 event_type = vertical ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag;
|
|
|
445 event_data = Fcons (win, make_int ((int)adj->value));
|
|
|
446 break;
|
|
|
447 default:
|
|
2500
|
448 ABORT();
|
|
462
|
449 }
|
|
|
450
|
|
|
451 signal_special_gtk_user_event (frame, event_type, event_data);
|
|
|
452
|
|
|
453 return (TRUE);
|
|
|
454 }
|
|
|
455
|
|
|
456 static void
|
|
|
457 gtk_scrollbar_pointer_changed_in_window (struct window *w)
|
|
|
458 {
|
|
793
|
459 Lisp_Object window = wrap_window (w);
|
|
462
|
460
|
|
617
|
461 gtk_scrollbar_loop (GTK_SET_SCROLLBAR_POINTER, window,
|
|
|
462 find_window_mirror (w), 0, (GdkWindow *) NULL);
|
|
462
|
463 }
|
|
|
464
|
|
|
465 /* #### BILL!!! This comment is not true for Gtk - should it be? */
|
|
|
466 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
467 directly from gtk_set_frame_properties in frame-gtk.c*/
|
|
|
468 void
|
|
|
469 gtk_update_frame_scrollbars (struct frame *f)
|
|
|
470 {
|
|
617
|
471 gtk_scrollbar_loop (GTK_UPDATE_FRAME_SCROLLBARS, f->root_window,
|
|
|
472 XWINDOW_MIRROR (f->root_mirror),
|
|
462
|
473 0, (GdkWindow *) NULL);
|
|
|
474 }
|
|
|
475
|
|
|
476 #ifdef MEMORY_USAGE_STATS
|
|
|
477 static int
|
|
2286
|
478 gtk_compute_scrollbar_instance_usage (struct device *UNUSED (d),
|
|
462
|
479 struct scrollbar_instance *inst,
|
|
|
480 struct overhead_stats *ovstats)
|
|
|
481 {
|
|
|
482 int total = 0;
|
|
|
483
|
|
|
484 while (inst)
|
|
|
485 {
|
|
|
486 struct gtk_scrollbar_data *data =
|
|
|
487 (struct gtk_scrollbar_data *) inst->scrollbar_data;
|
|
|
488
|
|
3024
|
489 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
462
|
490 inst = inst->next;
|
|
|
491 }
|
|
|
492
|
|
|
493 return total;
|
|
|
494 }
|
|
|
495
|
|
|
496 #endif /* MEMORY_USAGE_STATS */
|
|
|
497
|
|
|
498
|
|
|
499 /************************************************************************/
|
|
|
500 /* initialization */
|
|
|
501 /************************************************************************/
|
|
|
502
|
|
|
503 void
|
|
|
504 console_type_create_scrollbar_gtk (void)
|
|
|
505 {
|
|
|
506 CONSOLE_HAS_METHOD (gtk, inhibit_scrollbar_slider_size_change);
|
|
|
507 CONSOLE_HAS_METHOD (gtk, free_scrollbar_instance);
|
|
|
508 CONSOLE_HAS_METHOD (gtk, release_scrollbar_instance);
|
|
|
509 CONSOLE_HAS_METHOD (gtk, create_scrollbar_instance);
|
|
|
510 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_values);
|
|
|
511 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_status);
|
|
|
512 CONSOLE_HAS_METHOD (gtk, scrollbar_pointer_changed_in_window);
|
|
|
513 #ifdef MEMORY_USAGE_STATS
|
|
|
514 CONSOLE_HAS_METHOD (gtk, compute_scrollbar_instance_usage);
|
|
|
515 #endif /* MEMORY_USAGE_STATS */
|
|
|
516 }
|
|
|
517
|
|
|
518 void
|
|
|
519 vars_of_scrollbar_gtk (void)
|
|
|
520 {
|
|
|
521 Fprovide (intern ("gtk-scrollbars"));
|
|
|
522 }
|
