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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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59 if (SCROLLBAR_GTK_WIDGET (instance))
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60 {
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61 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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62 gtk_widget_destroy (SCROLLBAR_GTK_WIDGET (instance));
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63 }
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64
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65 if (instance->scrollbar_data)
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1726
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66 xfree (instance->scrollbar_data, void *);
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462
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67 }
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68
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69 /* A device method. */
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70 static void
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71 gtk_release_scrollbar_instance (struct scrollbar_instance *instance)
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72 {
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73 /* It won't hurt to hide it all the time, will it? */
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74 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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75 }
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76
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77 static gboolean
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78 scrollbar_drag_hack_cb (GtkWidget *w, GdkEventButton *ev, gpointer v)
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79 {
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80 vertical_drag_in_progress = (int) v;
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81 inhibit_slider_size_change = (int) v;
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82 return (FALSE);
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83 }
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84
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85 /* A device method. */
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86 static void
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87 gtk_create_scrollbar_instance (struct frame *f, int vertical,
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88 struct scrollbar_instance *instance)
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89 {
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90 GtkAdjustment *adj = GTK_ADJUSTMENT (gtk_adjustment_new (0,0,0,0,0,0));
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91 GtkScrollbar *sb = NULL;
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92
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93 /* initialize the X specific data section. */
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94 instance->scrollbar_data = xnew_and_zero (struct gtk_scrollbar_data);
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95
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96 SCROLLBAR_GTK_ID (instance) = new_gui_id ();
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97 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (instance) = -1;
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98 SCROLLBAR_GTK_LAST_VALUE (instance) = adj->value;
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99
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2168
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100 gtk_object_set_data (GTK_OBJECT (adj), GTK_DATA_GUI_IDENTIFIER, (void *) SCROLLBAR_GTK_ID (instance));
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101 gtk_object_set_data (GTK_OBJECT (adj), GTK_DATA_FRAME_IDENTIFIER, f);
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462
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102
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103 sb = GTK_SCROLLBAR (vertical ? gtk_vscrollbar_new (adj) : gtk_hscrollbar_new (adj));
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104 SCROLLBAR_GTK_WIDGET (instance) = GTK_WIDGET (sb);
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105
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106 gtk_signal_connect (GTK_OBJECT (adj),"value-changed",
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107 GTK_SIGNAL_FUNC (scrollbar_cb), (gpointer) vertical);
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108
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109 gtk_signal_connect (GTK_OBJECT (sb), "button-press-event",
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110 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 1);
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111 gtk_signal_connect (GTK_OBJECT (sb), "button-release-event",
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112 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 0);
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113
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114 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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115
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116 /*
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117 ** With gtk version > 1.2.8 the scrollbars in gtk-xemacs and xemacs
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118 ** from CVS are invisible. In fact they are not invisible but very
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119 ** thin (0 pixels wide). This is so, because the new gtk code does
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120 ** not call gtk_widget_request_size() on the newly created
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121 ** scrollbars anymore. this change was done to allow the theme
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122 ** engines to manipulate the scrollbar width. This patch calls
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123 ** gtk_widget_request_size with the newly created scollbars. Maybe
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124 ** it is better to postpone this call just before the
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125 ** gtk_widget_show() call is done on the scrolbar.
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126 */
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127 gtk_widget_size_request(GTK_WIDGET(sb), &(GTK_WIDGET(sb)->requisition));
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128
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462
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129 gtk_widget_hide (SCROLLBAR_GTK_WIDGET (instance));
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130 }
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131
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132 #define UPDATE_DATA_FIELD(field) \
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133 if (new_##field >= 0 && \
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134 SCROLLBAR_GTK_POS_DATA (inst).field != new_##field) { \
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135 SCROLLBAR_GTK_POS_DATA (inst).field = new_##field; \
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136 inst->scrollbar_instance_changed = 1; \
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137 }
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138
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139 /* A device method. */
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140 /* #### The -1 check is such a hack. */
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141 static void
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142 gtk_update_scrollbar_instance_values (struct window *w,
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143 struct scrollbar_instance *inst,
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144 int new_line_increment,
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145 int new_page_increment,
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146 int new_minimum, int new_maximum,
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147 int new_slider_size,
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148 int new_slider_position,
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149 int new_scrollbar_width,
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150 int new_scrollbar_height,
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151 int new_scrollbar_x, int new_scrollbar_y)
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152 {
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153 UPDATE_DATA_FIELD (line_increment);
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154 UPDATE_DATA_FIELD (page_increment);
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155 UPDATE_DATA_FIELD (minimum);
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156 UPDATE_DATA_FIELD (maximum);
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157 UPDATE_DATA_FIELD (slider_size);
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158 UPDATE_DATA_FIELD (slider_position);
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159 UPDATE_DATA_FIELD (scrollbar_width);
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160 UPDATE_DATA_FIELD (scrollbar_height);
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161 UPDATE_DATA_FIELD (scrollbar_x);
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162 UPDATE_DATA_FIELD (scrollbar_y);
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163
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164 if (w && !vertical_drag_in_progress)
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165 {
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166 int new_vov = SCROLLBAR_GTK_POS_DATA (inst).slider_position;
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167 int new_vows = marker_position (w->start[CURRENT_DISP]);
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168
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169 if (SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) != new_vov)
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170 {
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171 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) = new_vov;
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172 inst->scrollbar_instance_changed = 1;
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173 }
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174 if (SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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175 {
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176 SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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177 inst->scrollbar_instance_changed = 1;
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178 }
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179 }
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180 }
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181
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182 /* Used by gtk_update_scrollbar_instance_status. */
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183 static void
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184 update_one_widget_scrollbar_pointer (struct window *w, GtkWidget *wid)
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185 {
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186 if (!wid->window)
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187 gtk_widget_realize (wid);
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188
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189 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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190 {
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191 gdk_window_set_cursor (GET_GTK_WIDGET_WINDOW (wid),
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192 XIMAGE_INSTANCE_GTK_CURSOR (w->scrollbar_pointer));
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193 gdk_flush ();
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194 }
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195 }
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196
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197 /* A device method. */
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198 static void
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199 gtk_update_scrollbar_instance_status (struct window *w, int active, int size,
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200 struct scrollbar_instance *instance)
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201 {
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202 struct frame *f = XFRAME (w->frame);
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203 GtkWidget *wid = SCROLLBAR_GTK_WIDGET (instance);
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204 gboolean managed = GTK_WIDGET_MAPPED (wid);
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205
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206 if (active && size)
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207 {
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208 if (instance->scrollbar_instance_changed)
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209 {
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210 /* Need to set the height, width, and position of the widget */
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211 GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (wid));
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212 scrollbar_values *pos_data = & SCROLLBAR_GTK_POS_DATA (instance);
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213 int modified_p = 0;
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214
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215 /* We do not want to update the size all the time if we can
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216 help it. This cuts down on annoying flicker.
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217 */
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218 if ((wid->allocation.width != pos_data->scrollbar_width) ||
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219 (wid->allocation.height != pos_data->scrollbar_height))
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220 {
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221 gtk_widget_set_usize (wid,
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222 pos_data->scrollbar_width,
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223 pos_data->scrollbar_height);
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2195
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224
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225 /*
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226 UGLY! UGLY! UGLY! Changes to wid->allocation are queued and
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227 not performed until the GTK event loop. However, when the
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228 fontlock progress bar is run, the vertical scrollbar's height
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229 is change and then changed back before events are again
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230 processed. This means that the change back is not seen and
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231 the scrollbar is left too short. Fix this by making the
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232 change manually so the test above sees the change. This does
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233 not seem to cause problems in other cases.
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234 */
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235
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236 wid->allocation.width = pos_data->scrollbar_width;
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237 wid->allocation.height = pos_data->scrollbar_height;
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238
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462
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239 modified_p = 1;
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240 }
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241
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242 /* Ditto for the x/y position. */
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243 if ((wid->allocation.x != pos_data->scrollbar_x) ||
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244 (wid->allocation.y != pos_data->scrollbar_y))
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245 {
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246 gtk_fixed_move (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
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247 wid,
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248 pos_data->scrollbar_x,
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249 pos_data->scrollbar_y);
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2195
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250
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251 /*
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252 UGLY! UGLY! UGLY! Changes to wid->allocation are queued and
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253 not performed until the GTK event loop. However, when the
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254 fontlock progress bar is run, the horizontal scrollbar's
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255 position is change and then changed back before events are
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256 again processed. This means that the change back is not seen
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257 and the scrollbar is left in the wrong position. Fix this by
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258 making the change manually so the test above sees the change.
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259 This does not seem to cause problems in other cases.
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260 */
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261
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262 wid->allocation.x = pos_data->scrollbar_x;
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263 wid->allocation.y = pos_data->scrollbar_y;
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264
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462
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265 modified_p = 1;
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266 }
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267
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268 adj->lower = pos_data->minimum;
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269 adj->upper = pos_data->maximum;
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270 adj->page_increment = pos_data->slider_size + 1;
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271 adj->step_increment = w->max_line_len - 1;
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272 adj->page_size = pos_data->slider_size + 1;
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273 adj->value = pos_data->slider_position;
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274
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275 /* But, if we didn't resize or move the scrollbar, the
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276 widget will not get redrawn correctly when the user
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277 scrolls around in the XEmacs frame manually. So we
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278 update the slider manually here.
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279 */
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280 if (!modified_p)
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281 gtk_range_slider_update (GTK_RANGE (wid));
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282
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283 instance->scrollbar_instance_changed = 0;
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284 }
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285
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286 if (!managed)
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287 {
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288 gtk_widget_show (wid);
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289 update_one_widget_scrollbar_pointer (w, wid);
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290 }
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291 }
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292 else if (managed)
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293 {
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294 gtk_widget_hide (wid);
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295 }
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296 }
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297
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298 enum gtk_scrollbar_loop
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299 {
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300 GTK_FIND_SCROLLBAR_WINDOW_MIRROR,
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301 GTK_SET_SCROLLBAR_POINTER,
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302 GTK_WINDOW_IS_SCROLLBAR,
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303 GTK_UPDATE_FRAME_SCROLLBARS
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304 };
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305
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306 static struct window_mirror *
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307 gtk_scrollbar_loop (enum gtk_scrollbar_loop type, Lisp_Object window,
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308 struct window_mirror *mir,
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309 GUI_ID id, GdkWindow *x_win)
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310 {
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311 struct window_mirror *retval = NULL;
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312
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313 while (mir)
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314 {
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315 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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316 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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317 struct window *w = XWINDOW (window);
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318
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319 if (mir->vchild)
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320 retval = gtk_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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321 else if (mir->hchild)
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322 retval = gtk_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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323 if (retval)
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324 return retval;
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325
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326 if (hinstance || vinstance)
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327 {
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328 switch (type)
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329 {
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330 case GTK_FIND_SCROLLBAR_WINDOW_MIRROR:
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331 if ((vinstance && SCROLLBAR_GTK_ID (vinstance) == id) ||
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332 (hinstance && SCROLLBAR_GTK_ID (hinstance) == id))
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333 return mir;
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334 break;
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335 case GTK_UPDATE_FRAME_SCROLLBARS:
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336 if (!mir->vchild && !mir->hchild)
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337 update_window_scrollbars (w, mir, 1, 0);
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338 break;
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339 case GTK_SET_SCROLLBAR_POINTER:
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340 if (!mir->vchild && !mir->hchild)
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341 {
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342 GtkWidget *widget;
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343
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344 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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345 if (widget && GTK_WIDGET_MAPPED (widget))
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346 update_one_widget_scrollbar_pointer (w, widget);
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347
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348 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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349 if (widget && GTK_WIDGET_MAPPED (widget))
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350 update_one_widget_scrollbar_pointer (w, widget);
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351 }
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352 break;
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353 case GTK_WINDOW_IS_SCROLLBAR:
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354 if (!mir->vchild && !mir->hchild)
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355 {
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356 GtkWidget *widget;
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357
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358 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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359 if (widget && GTK_WIDGET_MAPPED (widget) &&
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360 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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361 return (struct window_mirror *) 1;
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362
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363 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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364 if (widget && GTK_WIDGET_MAPPED (widget) &&
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365 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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366 return (struct window_mirror *) 1;
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367 }
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368 break;
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369 default:
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370 abort ();
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371 }
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372 }
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373
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374 mir = mir->next;
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375 window = w->next;
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376 }
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377
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378 return NULL;
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379 }
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380
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381 /* Used by callbacks. */
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382 static struct window_mirror *
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383 find_scrollbar_window_mirror (struct frame *f, GUI_ID id)
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384 {
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385 if (f->mirror_dirty)
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386 update_frame_window_mirror (f);
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387 return gtk_scrollbar_loop (GTK_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
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617
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388 XWINDOW_MIRROR (f->root_mirror), id,
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389 (GdkWindow *) NULL);
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462
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390 }
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391
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392 static gboolean
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393 scrollbar_cb (GtkAdjustment *adj, gpointer user_data)
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394 {
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395 /* This function can GC */
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396 int vertical = (int) user_data;
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2168
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397 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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398 struct scrollbar_instance *instance;
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2168
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399 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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400 Lisp_Object win, frame;
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401 struct window_mirror *mirror;
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402 Lisp_Object event_type = Qnil;
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403 Lisp_Object event_data = Qnil;
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404
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405 if (!f)
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406 return(FALSE);
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407
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408 mirror = find_scrollbar_window_mirror (f, id);
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409 if (!mirror)
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410 return(FALSE);
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411
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412 win = real_window (mirror, 1);
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413
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414 if (NILP (win))
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415 return(FALSE);
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416 instance = vertical ? mirror->scrollbar_vertical_instance : mirror->scrollbar_horizontal_instance;
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417 frame = WINDOW_FRAME (XWINDOW (win));
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418
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419 inhibit_slider_size_change = 0;
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420 switch (GTK_RANGE (SCROLLBAR_GTK_WIDGET (instance))->scroll_type)
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421 {
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422 case GTK_SCROLL_PAGE_BACKWARD:
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423 event_type = vertical ? Qscrollbar_page_up : Qscrollbar_page_left;
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424 event_data = Fcons (win, Qnil);
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425 break;
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426 case GTK_SCROLL_PAGE_FORWARD:
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427 event_type = vertical ? Qscrollbar_page_down : Qscrollbar_page_right;
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428 event_data = Fcons (win, Qnil);
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429 break;
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430 case GTK_SCROLL_STEP_FORWARD:
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431 event_type = vertical ? Qscrollbar_line_down : Qscrollbar_char_right;
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432 event_data = win;
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433 break;
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434 case GTK_SCROLL_STEP_BACKWARD:
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435 event_type = vertical ? Qscrollbar_line_up : Qscrollbar_char_left;
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436 event_data = win;
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437 break;
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438 case GTK_SCROLL_NONE:
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439 case GTK_SCROLL_JUMP:
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440 inhibit_slider_size_change = 1;
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441 event_type = vertical ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag;
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442 event_data = Fcons (win, make_int ((int)adj->value));
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443 break;
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444 default:
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445 abort();
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446 }
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447
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448 signal_special_gtk_user_event (frame, event_type, event_data);
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449
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450 return (TRUE);
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451 }
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452
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453 static void
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454 gtk_scrollbar_pointer_changed_in_window (struct window *w)
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455 {
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793
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456 Lisp_Object window = wrap_window (w);
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462
|
457
|
|
617
|
458 gtk_scrollbar_loop (GTK_SET_SCROLLBAR_POINTER, window,
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459 find_window_mirror (w), 0, (GdkWindow *) NULL);
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462
|
460 }
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461
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462 /* #### BILL!!! This comment is not true for Gtk - should it be? */
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463 /* Make sure that all scrollbars on frame are up-to-date. Called
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464 directly from gtk_set_frame_properties in frame-gtk.c*/
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465 void
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|
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466 gtk_update_frame_scrollbars (struct frame *f)
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|
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467 {
|
|
617
|
468 gtk_scrollbar_loop (GTK_UPDATE_FRAME_SCROLLBARS, f->root_window,
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|
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469 XWINDOW_MIRROR (f->root_mirror),
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462
|
470 0, (GdkWindow *) NULL);
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|
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471 }
|
|
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472
|
|
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473 #ifdef MEMORY_USAGE_STATS
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474 static int
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|
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475 gtk_compute_scrollbar_instance_usage (struct device *d,
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|
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476 struct scrollbar_instance *inst,
|
|
|
477 struct overhead_stats *ovstats)
|
|
|
478 {
|
|
|
479 int total = 0;
|
|
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480
|
|
|
481 while (inst)
|
|
|
482 {
|
|
|
483 struct gtk_scrollbar_data *data =
|
|
|
484 (struct gtk_scrollbar_data *) inst->scrollbar_data;
|
|
|
485
|
|
|
486 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
487 inst = inst->next;
|
|
|
488 }
|
|
|
489
|
|
|
490 return total;
|
|
|
491 }
|
|
|
492
|
|
|
493 #endif /* MEMORY_USAGE_STATS */
|
|
|
494
|
|
|
495
|
|
|
496 /************************************************************************/
|
|
|
497 /* initialization */
|
|
|
498 /************************************************************************/
|
|
|
499
|
|
|
500 void
|
|
|
501 console_type_create_scrollbar_gtk (void)
|
|
|
502 {
|
|
|
503 CONSOLE_HAS_METHOD (gtk, inhibit_scrollbar_slider_size_change);
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|
|
504 CONSOLE_HAS_METHOD (gtk, free_scrollbar_instance);
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|
|
505 CONSOLE_HAS_METHOD (gtk, release_scrollbar_instance);
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|
|
506 CONSOLE_HAS_METHOD (gtk, create_scrollbar_instance);
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|
|
507 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_values);
|
|
|
508 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_status);
|
|
|
509 CONSOLE_HAS_METHOD (gtk, scrollbar_pointer_changed_in_window);
|
|
|
510 #ifdef MEMORY_USAGE_STATS
|
|
|
511 CONSOLE_HAS_METHOD (gtk, compute_scrollbar_instance_usage);
|
|
|
512 #endif /* MEMORY_USAGE_STATS */
|
|
|
513 }
|
|
|
514
|
|
|
515 void
|
|
|
516 vars_of_scrollbar_gtk (void)
|
|
|
517 {
|
|
|
518 Fprovide (intern ("gtk-scrollbars"));
|
|
|
519 }
|
