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386b63b85d
In 99.9% of all cases, these are just NULL, NULL. So just do away with these arguments, people can use the setters for the rare cases where they want the scrolled window to use a different adjustment.
252 lines
6.9 KiB
C
252 lines
6.9 KiB
C
/* simple.c
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* Copyright (C) 2017 Red Hat, Inc
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* Author: Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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const char text[] =
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"This library is free software; you can redistribute it and/or\n"
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"modify it under the terms of the GNU Library General Public\n"
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"License as published by the Free Software Foundation; either\n"
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"version 2 of the License, or (at your option) any later version.\n"
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"\n"
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"This library is distributed in the hope that it will be useful,\n"
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"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
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"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
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"Library General Public License for more details.\n"
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"\n"
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"You should have received a copy of the GNU Library General Public\n"
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"License along with this library. If not, see <http://www.gnu.org/licenses/>.\n";
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static GtkWidget *tv;
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static GtkTextBuffer *buffer;
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static int len;
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static GtkTextMark **marks;
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static guint marks_timeout;
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static gboolean toggle_mark (gpointer data)
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{
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int pos;
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GtkTextMark *mark;
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pos = g_random_int_range (0, len);
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mark = marks[pos];
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gtk_text_mark_set_visible (mark, !gtk_text_mark_get_visible (mark));
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return G_SOURCE_CONTINUE;
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}
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static void
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toggle_marks (GtkToggleButton *button)
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{
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int i;
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gboolean enable;
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enable = gtk_toggle_button_get_active (button);
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if (!marks)
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{
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marks = g_new (GtkTextMark*, len);
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for (i = 0; i < len; i++)
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{
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marks[i] = gtk_text_mark_new (NULL, TRUE);
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gtk_text_mark_set_visible (marks[i], i % 2);
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}
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}
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if (enable)
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{
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for (i = 0; i < len; i++)
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{
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GtkTextIter iter;
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gtk_text_buffer_get_iter_at_offset (buffer, &iter, i);
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gtk_text_buffer_add_mark (buffer, marks[i], &iter);
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}
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marks_timeout = g_timeout_add (16, toggle_mark, NULL);
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}
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else
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{
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for (i = 0; i < len; i++)
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gtk_text_buffer_delete_mark (buffer, marks[i]);
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if (marks_timeout)
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g_source_remove (marks_timeout);
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marks_timeout = 0;
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}
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}
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static gboolean
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move_insert (gpointer data)
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{
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GtkTextMark *mark;
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GtkTextIter iter, start, end;
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mark = gtk_text_buffer_get_insert (buffer);
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gtk_text_buffer_get_iter_at_mark (buffer, &iter, mark);
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gtk_text_buffer_get_bounds (buffer, &start, &end);
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if (gtk_text_iter_equal (&iter, &end))
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gtk_text_iter_assign (&iter, &start);
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else
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gtk_text_iter_forward_cursor_position (&iter);
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gtk_text_buffer_place_cursor (buffer, &iter);
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return G_SOURCE_CONTINUE;
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}
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static guint cursor_timeout;
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static void
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toggle_cursor (GtkToggleButton *button)
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{
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gboolean enable;
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enable = gtk_toggle_button_get_active (button);
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if (enable)
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cursor_timeout = g_timeout_add (16, move_insert, NULL);
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else
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{
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if (cursor_timeout)
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g_source_remove (cursor_timeout);
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cursor_timeout = 0;
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}
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}
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static GtkTextMark *the_mark;
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static GtkWidget *mark_check;
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static GtkWidget *mark_visible;
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static GtkWidget *position_spin;
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static void
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update_mark_exists (void)
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{
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int pos;
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GtkTextIter iter;
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pos = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (position_spin));
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gtk_text_buffer_get_iter_at_offset (buffer, &iter, pos);
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (mark_check)))
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gtk_text_buffer_add_mark (buffer, the_mark, &iter);
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else
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gtk_text_buffer_delete_mark (buffer, the_mark);
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}
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static void
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update_mark_visible (void)
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{
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gtk_text_mark_set_visible (the_mark, gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (mark_visible)));
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}
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static void
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update_mark_position (void)
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{
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int pos;
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GtkTextIter iter;
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pos = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (position_spin));
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gtk_text_buffer_get_iter_at_offset (buffer, &iter, pos);
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gtk_text_buffer_move_mark (buffer, the_mark, &iter);
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}
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static void
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quit_cb (GtkWidget *widget,
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gpointer data)
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{
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gboolean *done = data;
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*done = TRUE;
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g_main_context_wakeup (NULL);
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *window, *sw, *box, *box2, *button;
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gboolean done = FALSE;
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gtk_init ();
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window = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
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g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
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sw = gtk_scrolled_window_new ();
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gtk_widget_set_hexpand (sw, TRUE);
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gtk_widget_set_vexpand (sw, TRUE);
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gtk_window_set_child (GTK_WINDOW (window), box);
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gtk_box_append (GTK_BOX (box), sw);
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tv = gtk_text_view_new ();
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), tv);
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buffer = gtk_text_buffer_new (NULL);
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gtk_text_view_set_buffer (GTK_TEXT_VIEW (tv), buffer);
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gtk_text_buffer_set_text (buffer, text, -1);
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len = strlen (text);
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box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
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g_object_set (box, "margin-start", 10, "margin-end", 10, NULL);
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gtk_box_append (GTK_BOX (box), box2);
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the_mark = gtk_text_mark_new ("my mark", TRUE);
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box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
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gtk_box_append (GTK_BOX (box), box2);
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mark_check = gtk_check_button_new_with_label ("Mark");
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g_signal_connect (mark_check, "notify::active", G_CALLBACK (update_mark_exists), NULL);
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gtk_box_append (GTK_BOX (box2), mark_check);
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mark_visible = gtk_check_button_new_with_label ("Visible");
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g_signal_connect (mark_visible, "notify::active", G_CALLBACK (update_mark_visible), NULL);
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gtk_box_append (GTK_BOX (box2), mark_visible);
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gtk_box_append (GTK_BOX (box2), gtk_label_new ("Position:"));
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position_spin = gtk_spin_button_new_with_range (0, len, 1);
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g_signal_connect (position_spin, "value-changed", G_CALLBACK (update_mark_position), NULL);
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gtk_box_append (GTK_BOX (box2), position_spin);
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box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
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g_object_set (box, "margin-start", 10, "margin-end", 10, NULL);
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gtk_box_append (GTK_BOX (box), box2);
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button = gtk_toggle_button_new_with_label ("Random marks");
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g_signal_connect (button, "notify::active", G_CALLBACK (toggle_marks), NULL);
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gtk_box_append (GTK_BOX (box2), button);
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button = gtk_toggle_button_new_with_label ("Wandering cursor");
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g_signal_connect (button, "notify::active", G_CALLBACK (toggle_cursor), NULL);
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gtk_box_append (GTK_BOX (box2), button);
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gtk_widget_show (window);
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while (!done)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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