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462
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1 /* scrollbar implementation -- X interface.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994 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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30 #include "console-gtk.h"
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31 #include "glyphs-gtk.h"
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32 #include "gui-gtk.h"
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33 #include "scrollbar-gtk.h"
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34
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35 #include "frame.h"
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36 #include "window.h"
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37
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38 static gboolean scrollbar_cb (GtkAdjustment *adj, gpointer user_data);
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39
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40 /* Used to prevent changing the size of the slider while drag
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41 scrolling, under Motif. This is necessary because the Motif
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42 scrollbar is incredibly stupid about updating the slider and causes
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43 lots of flicker if it is done too often. */
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44 static int inhibit_slider_size_change;
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45
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46 static int vertical_drag_in_progress;
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47
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48
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49 /* A device method. */
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50 static int
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51 gtk_inhibit_scrollbar_slider_size_change (void)
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52 {
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53 return inhibit_slider_size_change;
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54 }
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55
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56 /* A device method. */
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57 static void
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58 gtk_free_scrollbar_instance (struct scrollbar_instance *instance)
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59 {
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60 if (SCROLLBAR_GTK_WIDGET (instance))
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61 {
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62 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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63 gtk_widget_destroy (SCROLLBAR_GTK_WIDGET (instance));
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64 }
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65
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66 if (instance->scrollbar_data)
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67 xfree (instance->scrollbar_data);
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68 }
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69
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70 /* A device method. */
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71 static void
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72 gtk_release_scrollbar_instance (struct scrollbar_instance *instance)
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73 {
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74 /* It won't hurt to hide it all the time, will it? */
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75 gtk_widget_hide_all (SCROLLBAR_GTK_WIDGET (instance));
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76 }
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77
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78 static gboolean
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79 scrollbar_drag_hack_cb (GtkWidget *w, GdkEventButton *ev, gpointer v)
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80 {
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81 vertical_drag_in_progress = (int) v;
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82 inhibit_slider_size_change = (int) v;
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83 return (FALSE);
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84 }
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85
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86 /* A device method. */
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87 static void
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88 gtk_create_scrollbar_instance (struct frame *f, int vertical,
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89 struct scrollbar_instance *instance)
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90 {
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91 GtkAdjustment *adj = GTK_ADJUSTMENT (gtk_adjustment_new (0,0,0,0,0,0));
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92 GtkScrollbar *sb = NULL;
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93
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94 /* initialize the X specific data section. */
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95 instance->scrollbar_data = xnew_and_zero (struct gtk_scrollbar_data);
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96
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97 SCROLLBAR_GTK_ID (instance) = new_gui_id ();
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98 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (instance) = -1;
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99 SCROLLBAR_GTK_LAST_VALUE (instance) = adj->value;
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100
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101 gtk_object_set_data (GTK_OBJECT (adj), "xemacs::gui_id", (void *) SCROLLBAR_GTK_ID (instance));
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102 gtk_object_set_data (GTK_OBJECT (adj), "xemacs::frame", f);
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103 gtk_object_set_data (GTK_OBJECT (adj), "xemacs::sb_instance", instance);
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104
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105 sb = GTK_SCROLLBAR (vertical ? gtk_vscrollbar_new (adj) : gtk_hscrollbar_new (adj));
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106 SCROLLBAR_GTK_WIDGET (instance) = GTK_WIDGET (sb);
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107
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108 gtk_signal_connect (GTK_OBJECT (adj),"value-changed",
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109 GTK_SIGNAL_FUNC (scrollbar_cb), (gpointer) vertical);
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110
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111 gtk_signal_connect (GTK_OBJECT (sb), "button-press-event",
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112 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 1);
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113 gtk_signal_connect (GTK_OBJECT (sb), "button-release-event",
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114 GTK_SIGNAL_FUNC (scrollbar_drag_hack_cb), (gpointer) 0);
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115
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116 gtk_fixed_put (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)), SCROLLBAR_GTK_WIDGET (instance), 0, 0);
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117 gtk_widget_hide (SCROLLBAR_GTK_WIDGET (instance));
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118 }
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119
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120 #define UPDATE_DATA_FIELD(field) \
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121 if (new_##field >= 0 && \
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122 SCROLLBAR_GTK_POS_DATA (inst).field != new_##field) { \
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123 SCROLLBAR_GTK_POS_DATA (inst).field = new_##field; \
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124 inst->scrollbar_instance_changed = 1; \
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125 }
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126
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127 /* A device method. */
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128 /* #### The -1 check is such a hack. */
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129 static void
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130 gtk_update_scrollbar_instance_values (struct window *w,
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131 struct scrollbar_instance *inst,
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132 int new_line_increment,
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133 int new_page_increment,
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134 int new_minimum, int new_maximum,
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135 int new_slider_size,
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136 int new_slider_position,
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137 int new_scrollbar_width,
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138 int new_scrollbar_height,
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139 int new_scrollbar_x, int new_scrollbar_y)
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140 {
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141 UPDATE_DATA_FIELD (line_increment);
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142 UPDATE_DATA_FIELD (page_increment);
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143 UPDATE_DATA_FIELD (minimum);
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144 UPDATE_DATA_FIELD (maximum);
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145 UPDATE_DATA_FIELD (slider_size);
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146 UPDATE_DATA_FIELD (slider_position);
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147 UPDATE_DATA_FIELD (scrollbar_width);
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148 UPDATE_DATA_FIELD (scrollbar_height);
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149 UPDATE_DATA_FIELD (scrollbar_x);
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150 UPDATE_DATA_FIELD (scrollbar_y);
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151
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152 if (w && !vertical_drag_in_progress)
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153 {
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154 int new_vov = SCROLLBAR_GTK_POS_DATA (inst).slider_position;
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155 int new_vows = marker_position (w->start[CURRENT_DISP]);
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156
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157 if (SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) != new_vov)
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158 {
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159 SCROLLBAR_GTK_VDRAG_ORIG_VALUE (inst) = new_vov;
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160 inst->scrollbar_instance_changed = 1;
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161 }
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162 if (SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
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163 {
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164 SCROLLBAR_GTK_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
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165 inst->scrollbar_instance_changed = 1;
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166 }
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167 }
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168 }
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169
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170 /* Used by gtk_update_scrollbar_instance_status. */
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171 static void
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172 update_one_widget_scrollbar_pointer (struct window *w, GtkWidget *wid)
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173 {
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174 if (!wid->window)
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175 gtk_widget_realize (wid);
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176
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177 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
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178 {
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179 gdk_window_set_cursor (GET_GTK_WIDGET_WINDOW (wid),
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180 XIMAGE_INSTANCE_GTK_CURSOR (w->scrollbar_pointer));
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181 gdk_flush ();
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182 }
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183 }
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184
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185 /* A device method. */
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186 static void
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187 gtk_update_scrollbar_instance_status (struct window *w, int active, int size,
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188 struct scrollbar_instance *instance)
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189 {
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190 struct frame *f = XFRAME (w->frame);
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191 GtkWidget *wid = SCROLLBAR_GTK_WIDGET (instance);
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192 gboolean managed = GTK_WIDGET_MAPPED (wid);
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193
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194 if (active && size)
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195 {
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196 if (instance->scrollbar_instance_changed)
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197 {
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198 /* Need to set the height, width, and position of the widget */
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199 GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (wid));
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200 scrollbar_values *pos_data = & SCROLLBAR_GTK_POS_DATA (instance);
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201 int modified_p = 0;
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202
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203 /* We do not want to update the size all the time if we can
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204 help it. This cuts down on annoying flicker.
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205 */
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206 if ((wid->allocation.width != pos_data->scrollbar_width) ||
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207 (wid->allocation.height != pos_data->scrollbar_height))
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208 {
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209 gtk_widget_set_usize (wid,
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210 pos_data->scrollbar_width,
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211 pos_data->scrollbar_height);
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212 modified_p = 1;
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213 }
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214
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215 /* Ditto for the x/y position. */
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216 if ((wid->allocation.x != pos_data->scrollbar_x) ||
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217 (wid->allocation.y != pos_data->scrollbar_y))
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218 {
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219 gtk_fixed_move (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
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220 wid,
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221 pos_data->scrollbar_x,
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222 pos_data->scrollbar_y);
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223 modified_p = 1;
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224 }
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225
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226 adj->lower = pos_data->minimum;
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227 adj->upper = pos_data->maximum;
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228 adj->page_increment = pos_data->slider_size + 1;
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229 adj->step_increment = w->max_line_len - 1;
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230 adj->page_size = pos_data->slider_size + 1;
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231 adj->value = pos_data->slider_position;
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232
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233 /* But, if we didn't resize or move the scrollbar, the
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234 widget will not get redrawn correctly when the user
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235 scrolls around in the XEmacs frame manually. So we
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236 update the slider manually here.
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237 */
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238 if (!modified_p)
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239 gtk_range_slider_update (GTK_RANGE (wid));
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240
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241 instance->scrollbar_instance_changed = 0;
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242 }
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243
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244 if (!managed)
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245 {
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246 gtk_widget_show (wid);
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247 update_one_widget_scrollbar_pointer (w, wid);
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248 }
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249 }
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250 else if (managed)
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251 {
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252 gtk_widget_hide (wid);
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253 }
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254 }
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255
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256 enum gtk_scrollbar_loop
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257 {
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258 GTK_FIND_SCROLLBAR_WINDOW_MIRROR,
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259 GTK_SET_SCROLLBAR_POINTER,
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260 GTK_WINDOW_IS_SCROLLBAR,
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261 GTK_UPDATE_FRAME_SCROLLBARS
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262 };
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263
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264 static struct window_mirror *
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265 gtk_scrollbar_loop (enum gtk_scrollbar_loop type, Lisp_Object window,
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266 struct window_mirror *mir,
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267 GUI_ID id, GdkWindow *x_win)
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268 {
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269 struct window_mirror *retval = NULL;
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270
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271 while (mir)
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272 {
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273 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
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274 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
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275 struct window *w = XWINDOW (window);
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276
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277 if (mir->vchild)
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278 retval = gtk_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
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279 else if (mir->hchild)
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280 retval = gtk_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
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281 if (retval)
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282 return retval;
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283
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284 if (hinstance || vinstance)
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285 {
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286 switch (type)
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287 {
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288 case GTK_FIND_SCROLLBAR_WINDOW_MIRROR:
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289 if ((vinstance && SCROLLBAR_GTK_ID (vinstance) == id) ||
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290 (hinstance && SCROLLBAR_GTK_ID (hinstance) == id))
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291 return mir;
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292 break;
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293 case GTK_UPDATE_FRAME_SCROLLBARS:
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294 if (!mir->vchild && !mir->hchild)
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295 update_window_scrollbars (w, mir, 1, 0);
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296 break;
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297 case GTK_SET_SCROLLBAR_POINTER:
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298 if (!mir->vchild && !mir->hchild)
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299 {
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300 GtkWidget *widget;
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301
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302 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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303 if (widget && GTK_WIDGET_MAPPED (widget))
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304 update_one_widget_scrollbar_pointer (w, widget);
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305
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306 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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307 if (widget && GTK_WIDGET_MAPPED (widget))
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308 update_one_widget_scrollbar_pointer (w, widget);
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309 }
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310 break;
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311 case GTK_WINDOW_IS_SCROLLBAR:
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312 if (!mir->vchild && !mir->hchild)
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313 {
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314 GtkWidget *widget;
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315
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316 widget = SCROLLBAR_GTK_WIDGET (hinstance);
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317 if (widget && GTK_WIDGET_MAPPED (widget) &&
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318 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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319 return (struct window_mirror *) 1;
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320
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321 widget = SCROLLBAR_GTK_WIDGET (vinstance);
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322 if (widget && GTK_WIDGET_MAPPED (widget) &&
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323 GET_GTK_WIDGET_WINDOW (widget) == x_win)
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324 return (struct window_mirror *) 1;
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325 }
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326 break;
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327 default:
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328 abort ();
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329 }
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330 }
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331
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332 mir = mir->next;
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333 window = w->next;
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334 }
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335
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336 return NULL;
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337 }
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338
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339 /* Used by callbacks. */
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340 static struct window_mirror *
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341 find_scrollbar_window_mirror (struct frame *f, GUI_ID id)
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342 {
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343 if (f->mirror_dirty)
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344 update_frame_window_mirror (f);
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345 return gtk_scrollbar_loop (GTK_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
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346 f->root_mirror, id, (GdkWindow *) NULL);
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347 }
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348
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349 static gboolean
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350 scrollbar_cb (GtkAdjustment *adj, gpointer user_data)
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351 {
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352 /* This function can GC */
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353 int vertical = (int) user_data;
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354 struct frame *f = gtk_object_get_data (GTK_OBJECT (adj), "xemacs::frame");
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355 struct scrollbar_instance *instance = gtk_object_get_data (GTK_OBJECT (adj), "xemacs::sb_instance");
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356 GUI_ID id = (GUI_ID) gtk_object_get_data (GTK_OBJECT (adj), "xemacs::gui_id");
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357 Lisp_Object win, frame;
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358 struct window_mirror *mirror;
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359 Lisp_Object event_type = Qnil;
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360 Lisp_Object event_data = Qnil;
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361
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362 if (!f)
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363 return(FALSE);
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364
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365 mirror = find_scrollbar_window_mirror (f, id);
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366 if (!mirror)
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367 return(FALSE);
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368
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369 win = real_window (mirror, 1);
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370
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371 if (NILP (win))
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372 return(FALSE);
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373 instance = vertical ? mirror->scrollbar_vertical_instance : mirror->scrollbar_horizontal_instance;
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374 frame = WINDOW_FRAME (XWINDOW (win));
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375
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376 inhibit_slider_size_change = 0;
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377 switch (GTK_RANGE (SCROLLBAR_GTK_WIDGET (instance))->scroll_type)
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378 {
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379 case GTK_SCROLL_PAGE_BACKWARD:
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380 event_type = vertical ? Qscrollbar_page_up : Qscrollbar_page_left;
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381 event_data = Fcons (win, Qnil);
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382 break;
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383 case GTK_SCROLL_PAGE_FORWARD:
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384 event_type = vertical ? Qscrollbar_page_down : Qscrollbar_page_right;
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385 event_data = Fcons (win, Qnil);
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386 break;
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387 case GTK_SCROLL_STEP_FORWARD:
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388 event_type = vertical ? Qscrollbar_line_down : Qscrollbar_char_right;
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389 event_data = win;
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390 break;
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391 case GTK_SCROLL_STEP_BACKWARD:
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392 event_type = vertical ? Qscrollbar_line_up : Qscrollbar_char_left;
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393 event_data = win;
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|
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394 break;
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395 case GTK_SCROLL_NONE:
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396 case GTK_SCROLL_JUMP:
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397 inhibit_slider_size_change = 1;
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|
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398 event_type = vertical ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag;
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|
|
399 event_data = Fcons (win, make_int ((int)adj->value));
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|
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400 break;
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401 default:
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|
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402 abort();
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|
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403 }
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|
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404
|
|
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405 signal_special_gtk_user_event (frame, event_type, event_data);
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406
|
|
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407 return (TRUE);
|
|
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408 }
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409
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|
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410 static void
|
|
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411 gtk_scrollbar_pointer_changed_in_window (struct window *w)
|
|
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412 {
|
|
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413 Lisp_Object window;
|
|
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414
|
|
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415 XSETWINDOW (window, w);
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416 gtk_scrollbar_loop (GTK_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
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|
|
417 0, (GdkWindow *) NULL);
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|
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418 }
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|
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419
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|
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420 /* #### BILL!!! This comment is not true for Gtk - should it be? */
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|
421 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
|
422 directly from gtk_set_frame_properties in frame-gtk.c*/
|
|
|
423 void
|
|
|
424 gtk_update_frame_scrollbars (struct frame *f)
|
|
|
425 {
|
|
|
426 /* Consider this code to be "in_display" so that we abort() if Fsignal()
|
|
|
427 gets called. */
|
|
|
428 in_display++;
|
|
|
429 gtk_scrollbar_loop (GTK_UPDATE_FRAME_SCROLLBARS, f->root_window, f->root_mirror,
|
|
|
430 0, (GdkWindow *) NULL);
|
|
|
431 in_display--;
|
|
|
432 if (in_display < 0) abort ();
|
|
|
433 }
|
|
|
434
|
|
|
435 #ifdef MEMORY_USAGE_STATS
|
|
|
436 static int
|
|
|
437 gtk_compute_scrollbar_instance_usage (struct device *d,
|
|
|
438 struct scrollbar_instance *inst,
|
|
|
439 struct overhead_stats *ovstats)
|
|
|
440 {
|
|
|
441 int total = 0;
|
|
|
442
|
|
|
443 while (inst)
|
|
|
444 {
|
|
|
445 struct gtk_scrollbar_data *data =
|
|
|
446 (struct gtk_scrollbar_data *) inst->scrollbar_data;
|
|
|
447
|
|
|
448 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
|
449 inst = inst->next;
|
|
|
450 }
|
|
|
451
|
|
|
452 return total;
|
|
|
453 }
|
|
|
454
|
|
|
455 #endif /* MEMORY_USAGE_STATS */
|
|
|
456
|
|
|
457
|
|
|
458 /************************************************************************/
|
|
|
459 /* initialization */
|
|
|
460 /************************************************************************/
|
|
|
461
|
|
|
462 void
|
|
|
463 console_type_create_scrollbar_gtk (void)
|
|
|
464 {
|
|
|
465 CONSOLE_HAS_METHOD (gtk, inhibit_scrollbar_slider_size_change);
|
|
|
466 CONSOLE_HAS_METHOD (gtk, free_scrollbar_instance);
|
|
|
467 CONSOLE_HAS_METHOD (gtk, release_scrollbar_instance);
|
|
|
468 CONSOLE_HAS_METHOD (gtk, create_scrollbar_instance);
|
|
|
469 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_values);
|
|
|
470 CONSOLE_HAS_METHOD (gtk, update_scrollbar_instance_status);
|
|
|
471 CONSOLE_HAS_METHOD (gtk, scrollbar_pointer_changed_in_window);
|
|
|
472 #ifdef MEMORY_USAGE_STATS
|
|
|
473 CONSOLE_HAS_METHOD (gtk, compute_scrollbar_instance_usage);
|
|
|
474 #endif /* MEMORY_USAGE_STATS */
|
|
|
475 }
|
|
|
476
|
|
|
477 void
|
|
|
478 vars_of_scrollbar_gtk (void)
|
|
|
479 {
|
|
|
480 Fprovide (intern ("gtk-scrollbars"));
|
|
|
481 }
|
