Learning_GTK4_tree/examples/application9/exampleappwin.c

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2023-12-12 11:36:42 +01:00
#include <gtk/gtk.h>
#include "exampleapp.h"
#include "exampleappwin.h"
struct _ExampleAppWindow
{
GtkApplicationWindow parent;
GSettings *settings;
GtkWidget *stack;
GtkWidget *gears;
GtkWidget *search;
GtkWidget *searchbar;
GtkWidget *searchentry;
GtkWidget *sidebar;
GtkWidget *words;
GtkWidget *lines;
GtkWidget *lines_label;
};
G_DEFINE_TYPE (ExampleAppWindow, example_app_window, GTK_TYPE_APPLICATION_WINDOW)
static void
search_text_changed (GtkEntry *entry,
ExampleAppWindow *win)
{
const char *text;
GtkWidget *tab;
GtkWidget *view;
GtkTextBuffer *buffer;
GtkTextIter start, match_start, match_end;
text = gtk_editable_get_text (GTK_EDITABLE (entry));
if (text[0] == '\0')
return;
tab = gtk_stack_get_visible_child (GTK_STACK (win->stack));
view = gtk_scrolled_window_get_child (GTK_SCROLLED_WINDOW (tab));
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
/* Very simple-minded search implementation */
gtk_text_buffer_get_start_iter (buffer, &start);
if (gtk_text_iter_forward_search (&start, text, GTK_TEXT_SEARCH_CASE_INSENSITIVE,
&match_start, &match_end, NULL))
{
gtk_text_buffer_select_range (buffer, &match_start, &match_end);
gtk_text_view_scroll_to_iter (GTK_TEXT_VIEW (view), &match_start,
0.0, FALSE, 0.0, 0.0);
}
}
static void
find_word (GtkButton *button,
ExampleAppWindow *win)
{
const char *word;
word = gtk_button_get_label (button);
gtk_editable_set_text (GTK_EDITABLE (win->searchentry), word);
}
static void
update_words (ExampleAppWindow *win)
{
GHashTable *strings;
GHashTableIter iter;
GtkWidget *tab, *view, *row;
GtkTextBuffer *buffer;
GtkTextIter start, end;
char *word, *key;
GtkWidget *child;
tab = gtk_stack_get_visible_child (GTK_STACK (win->stack));
if (tab == NULL)
return;
view = gtk_scrolled_window_get_child (GTK_SCROLLED_WINDOW (tab));
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
strings = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
gtk_text_buffer_get_start_iter (buffer, &start);
while (!gtk_text_iter_is_end (&start))
{
while (!gtk_text_iter_starts_word (&start))
{
if (!gtk_text_iter_forward_char (&start))
goto done;
}
end = start;
if (!gtk_text_iter_forward_word_end (&end))
goto done;
word = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
g_hash_table_add (strings, g_utf8_strdown (word, -1));
g_free (word);
start = end;
}
done:
while ((child = gtk_widget_get_first_child (win->words)))
gtk_list_box_remove (GTK_LIST_BOX (win->words), child);
g_hash_table_iter_init (&iter, strings);
while (g_hash_table_iter_next (&iter, (gpointer *)&key, NULL))
{
row = gtk_button_new_with_label (key);
g_signal_connect (row, "clicked",
G_CALLBACK (find_word), win);
gtk_list_box_insert (GTK_LIST_BOX (win->words), row, -1);
}
g_hash_table_unref (strings);
}
static void
update_lines (ExampleAppWindow *win)
{
GtkWidget *tab, *view;
GtkTextBuffer *buffer;
int count;
char *lines;
tab = gtk_stack_get_visible_child (GTK_STACK (win->stack));
if (tab == NULL)
return;
view = gtk_scrolled_window_get_child (GTK_SCROLLED_WINDOW (tab));
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
count = gtk_text_buffer_get_line_count (buffer);
lines = g_strdup_printf ("%d", count);
gtk_label_set_text (GTK_LABEL (win->lines), lines);
g_free (lines);
}
static void
visible_child_changed (GObject *stack,
GParamSpec *pspec,
ExampleAppWindow *win)
{
if (gtk_widget_in_destruction (GTK_WIDGET (stack)))
return;
gtk_search_bar_set_search_mode (GTK_SEARCH_BAR (win->searchbar), FALSE);
update_words (win);
update_lines (win);
}
static void
words_changed (GObject *sidebar,
GParamSpec *pspec,
ExampleAppWindow *win)
{
update_words (win);
}
static void
example_app_window_init (ExampleAppWindow *win)
{
GtkBuilder *builder;
GMenuModel *menu;
GAction *action;
gtk_widget_init_template (GTK_WIDGET (win));
builder = gtk_builder_new_from_resource ("/org/gtk/exampleapp/gears-menu.ui");
menu = G_MENU_MODEL (gtk_builder_get_object (builder, "menu"));
gtk_menu_button_set_menu_model (GTK_MENU_BUTTON (win->gears), menu);
g_object_unref (builder);
win->settings = g_settings_new ("org.gtk.exampleapp");
g_settings_bind (win->settings, "transition",
win->stack, "transition-type",
G_SETTINGS_BIND_DEFAULT);
g_settings_bind (win->settings, "show-words",
win->sidebar, "reveal-child",
G_SETTINGS_BIND_DEFAULT);
g_object_bind_property (win->search, "active",
win->searchbar, "search-mode-enabled",
G_BINDING_BIDIRECTIONAL);
g_signal_connect (win->sidebar, "notify::reveal-child",
G_CALLBACK (words_changed), win);
action = g_settings_create_action (win->settings, "show-words");
g_action_map_add_action (G_ACTION_MAP (win), action);
g_object_unref (action);
action = (GAction*) g_property_action_new ("show-lines", win->lines, "visible");
g_action_map_add_action (G_ACTION_MAP (win), action);
g_object_unref (action);
g_object_bind_property (win->lines, "visible",
win->lines_label, "visible",
G_BINDING_DEFAULT);
}
static void
example_app_window_dispose (GObject *object)
{
ExampleAppWindow *win;
win = EXAMPLE_APP_WINDOW (object);
g_clear_object (&win->settings);
G_OBJECT_CLASS (example_app_window_parent_class)->dispose (object);
}
static void
example_app_window_class_init (ExampleAppWindowClass *class)
{
G_OBJECT_CLASS (class)->dispose = example_app_window_dispose;
gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (class),
"/org/gtk/exampleapp/window.ui");
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, stack);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, gears);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, search);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, searchbar);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, searchentry);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, words);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, sidebar);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, lines);
gtk_widget_class_bind_template_child (GTK_WIDGET_CLASS (class), ExampleAppWindow, lines_label);
gtk_widget_class_bind_template_callback (GTK_WIDGET_CLASS (class), search_text_changed);
gtk_widget_class_bind_template_callback (GTK_WIDGET_CLASS (class), visible_child_changed);
}
ExampleAppWindow *
example_app_window_new (ExampleApp *app)
{
return g_object_new (EXAMPLE_APP_WINDOW_TYPE, "application", app, NULL);
}
void
example_app_window_open (ExampleAppWindow *win,
GFile *file)
{
char *basename;
GtkWidget *scrolled, *view;
char *contents;
gsize length;
GtkTextBuffer *buffer;
GtkTextTag *tag;
GtkTextIter start_iter, end_iter;
basename = g_file_get_basename (file);
scrolled = gtk_scrolled_window_new ();
gtk_widget_set_hexpand (scrolled, TRUE);
gtk_widget_set_vexpand (scrolled, TRUE);
view = gtk_text_view_new ();
gtk_text_view_set_editable (GTK_TEXT_VIEW (view), FALSE);
gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (view), FALSE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolled), view);
gtk_stack_add_titled (GTK_STACK (win->stack), scrolled, basename, basename);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
if (g_file_load_contents (file, NULL, &contents, &length, NULL, NULL))
{
gtk_text_buffer_set_text (buffer, contents, length);
g_free (contents);
}
tag = gtk_text_buffer_create_tag (buffer, NULL, NULL);
g_settings_bind (win->settings, "font",
tag, "font",
G_SETTINGS_BIND_DEFAULT);
gtk_text_buffer_get_start_iter (buffer, &start_iter);
gtk_text_buffer_get_end_iter (buffer, &end_iter);
gtk_text_buffer_apply_tag (buffer, tag, &start_iter, &end_iter);
g_free (basename);
gtk_widget_set_sensitive (win->search, TRUE);
update_words (win);
update_lines (win);
}