gtk2/examples/application7/exampleappwin.c

#include "exampleapp.h"
#include "exampleappwin.h"
#include <gtk/gtk.h>

struct ExampleAppWindow {
        GtkApplicationWindow parent;
};

struct ExampleAppWindowClass {
        GtkApplicationWindowClass parent_class;
};

typedef struct ExampleAppWindowPrivate ExampleAppWindowPrivate;

struct ExampleAppWindowPrivate {
        GSettings *settings;
        GtkWidget *stack;
        GtkWidget *search;
        GtkWidget *searchbar;
        GtkWidget *searchentry;
        gulong text_changed_handler;
        gulong tab_changed_handler;
};

G_DEFINE_TYPE_WITH_PRIVATE(ExampleAppWindow, example_app_window, GTK_TYPE_APPLICATION_WINDOW);

static void
search_text_changed (GtkEntry         *entry,
                     ExampleAppWindow *win)
{
        ExampleAppWindowPrivate *priv;
        const gchar *text;
        GtkWidget *tab;
        GtkWidget *view;
        GtkTextBuffer *buffer;
        GtkTextIter start, match_start, match_end;

        text = gtk_entry_get_text (entry);

        if (text[0] == '\0')
                return;

        priv = example_app_window_get_instance_private (win);

        tab = gtk_stack_get_visible_child (GTK_STACK (priv->stack));
        view = gtk_bin_get_child (GTK_BIN (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
visible_child_changed (GObject          *stack,
                       GParamSpec       *pspec,
                       ExampleAppWindow *win)
{
        ExampleAppWindowPrivate *priv;

        priv = example_app_window_get_instance_private (win);
        gtk_search_bar_set_search_mode (GTK_SEARCH_BAR (priv->searchbar), FALSE);
}

static void
example_app_window_init (ExampleAppWindow *win)
{
        ExampleAppWindowPrivate *priv;

        priv = example_app_window_get_instance_private (win);
        gtk_widget_init_template (GTK_WIDGET (win));
        priv->settings = g_settings_new ("org.gtk.exampleapp");

        g_settings_bind (priv->settings, "transition",
                         priv->stack, "transition-type",
                         G_SETTINGS_BIND_DEFAULT);

        g_object_bind_property (priv->search, "active",
                                priv->searchbar, "search-mode-enabled",
                                G_BINDING_BIDIRECTIONAL);

        priv->text_changed_handler = g_signal_connect (priv->searchentry, "changed",
                                                       G_CALLBACK (search_text_changed), win);
        priv->tab_changed_handler = g_signal_connect (priv->stack, "notify::visible-child",
                                                      G_CALLBACK (visible_child_changed), win);
}

static void
example_app_window_dispose (GObject *object)
{
        ExampleAppWindow *win;
        ExampleAppWindowPrivate *priv;

        win = EXAMPLE_APP_WINDOW (object);
        priv = example_app_window_get_instance_private (win);

        if (priv->text_changed_handler != 0) {
                g_signal_handler_disconnect (priv->searchentry, priv->text_changed_handler);
                priv->text_changed_handler = 0;
        }

        if (priv->tab_changed_handler != 0) {
                g_signal_handler_disconnect (priv->stack, priv->tab_changed_handler);
                priv->tab_changed_handler = 0;
        }

        g_clear_object (&priv->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_child (GTK_WIDGET_CLASS (class), ExampleAppWindowPrivate, stack);
        gtk_widget_class_bind_child (GTK_WIDGET_CLASS (class), ExampleAppWindowPrivate, search);
        gtk_widget_class_bind_child (GTK_WIDGET_CLASS (class), ExampleAppWindowPrivate, searchbar);
        gtk_widget_class_bind_child (GTK_WIDGET_CLASS (class), ExampleAppWindowPrivate, searchentry);
}

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)
{
        ExampleAppWindowPrivate *priv;
        gchar *basename;
        GtkWidget *scrolled, *view;
        gchar *contents;
        gsize length;
        GtkTextBuffer *buffer;
        GtkTextTag *tag;
        GtkTextIter start_iter, end_iter;

        priv = example_app_window_get_instance_private (win);
        basename = g_file_get_basename (file);

        scrolled = gtk_scrolled_window_new (NULL, NULL);
        gtk_widget_show (scrolled);
        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_widget_show (view);
        gtk_container_add (GTK_CONTAINER (scrolled), view);
        gtk_stack_add_titled (GTK_STACK (priv->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 (priv->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 (priv->search, TRUE);
}