favorites.cpp

linux下的一款播放器

{
    GtkTreeModel* model;
    GtkTreePath* path = gtk_tree_path_new_from_string (path_string);
    GtkTreeIter iter;
    gint column;
    HXFavorite* favorite = NULL;
    
    column = (gint)g_object_get_data (G_OBJECT (cell), "column");
    model = (GtkTreeModel*)g_object_get_data (G_OBJECT (cell), "model");

    g_return_if_fail(model != NULL);
    
    gtk_tree_model_get_iter(model, &iter, path);
    
    gtk_tree_model_get(GTK_TREE_MODEL(model), &iter,
                       COLUMN_FAVORITE, &favorite,
                       -1);

    g_return_if_fail(favorite != NULL);
    
    switch(column)
    {
        case COLUMN_TITLE:
            g_free(favorite->title);
            favorite->title = g_strdup(new_text);
            gtk_list_store_set(GTK_LIST_STORE(model), &iter,
                               COLUMN_TITLE, favorite->title,
                               -1);
            break;

        case COLUMN_URL:
            g_free(favorite->url);
            favorite->url = g_strdup(new_text);
            gtk_list_store_set(GTK_LIST_STORE(model), &iter,
                               COLUMN_URL, favorite->url,
                               -1);
            break;
    }

    gtk_tree_path_free(path);
}

static void
count_selections(GtkTreeModel* /* model */,
                 GtkTreePath*  /* path */,
                 GtkTreeIter*  /* iter */,
                 gpointer data)
{
    gint* count = (gint*)data;

    (*count)++;
}

void 
hfd_selection_changed(GtkTreeSelection* selection,
                      GtkWidget* delete_button)
{
    gint count = 0;
        
    gtk_tree_selection_selected_foreach(selection, count_selections, &count);

    if(count > 0)
    {
        /* Enable delete button */
        gtk_widget_set_sensitive(GTK_WIDGET(delete_button), TRUE);
    }
    else
    {
        /* Disable delete button */
        gtk_widget_set_sensitive(GTK_WIDGET(delete_button), FALSE);
    }
}

typedef struct
{
    GladeXML* xml;
} HXManageFavoritesDialog;

static void
hxplay_manage_favorites_dialog_destroy (GtkWidget* /* widget */,
                                        HXManageFavoritesDialog* info)
{
    glade_xml_destroy (info->xml);

    g_free(info);
}

GtkDialog*
hxplay_manage_favorites_dialog_new(GList** favorites_list_ptr)
{
    GladeXML* xml;
    GtkWidget* dialog;
    gchar* filename;
    GList* favorites_list = *favorites_list_ptr;
    GList* favorites_list_iter;
    GtkWidget* tree_view;
    GtkWidget* delete_button;
    GtkListStore *store;
    GtkCellRenderer *renderer;
    GtkTreeViewColumn *column;
    GtkTreeIter tree_iter;
    GtkTreeSelection* selection;
    HXManageFavoritesDialog* info;
    
    filename = hxcommon_locate_file("favorites.glade");
    xml = glade_xml_new (filename, NULL, NULL);
    g_free(filename);
    g_return_val_if_fail(xml != NULL, NULL);

    dialog = glade_xml_get_widget(xml, "hxplayer_favorites_dialog");    
    g_return_val_if_fail(dialog != NULL, NULL);

    delete_button = glade_xml_get_widget(xml, "hfd_delete_button");    
    g_return_val_if_fail(delete_button != NULL, NULL);
    
    tree_view = glade_xml_get_widget (xml, "hfd_tree_view");
    g_return_val_if_fail(tree_view != NULL, NULL);

    selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));

    gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);
    
    g_signal_connect(G_OBJECT(selection), "changed",
                     G_CALLBACK(hfd_selection_changed), delete_button);

    /* Populate the store */
    store = gtk_list_store_new(NUM_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_BOOLEAN, G_TYPE_POINTER);
    
    favorites_list_iter = favorites_list;
    while(favorites_list_iter)
    {
        HXFavorite* favorite = (HXFavorite*)favorites_list_iter->data;
        
        gtk_list_store_append(store, &tree_iter);
	gtk_list_store_set (store, &tree_iter,
			    COLUMN_TITLE, favorite->title,
                            COLUMN_URL, favorite->url,
                            COLUMN_EDITABLE, TRUE,
                            COLUMN_FAVORITE, favorite,
			    -1);

        favorites_list_iter = g_list_next(favorites_list_iter);
    }
    
    /* Configure the tree view */
    gtk_tree_view_set_model(GTK_TREE_VIEW(tree_view),
			    GTK_TREE_MODEL(store));

    /* Title column */
    renderer = gtk_cell_renderer_text_new();
    
    g_signal_connect(G_OBJECT(renderer), "edited",
                     G_CALLBACK(hfd_cell_edited), NULL);

    g_object_set_data(G_OBJECT(renderer), "model", store);
    g_object_set_data(G_OBJECT(renderer), "column", (gint *)COLUMN_TITLE);
    
    column = gtk_tree_view_column_new_with_attributes(_("Title"),
                                                      renderer,
                                                      "text", COLUMN_TITLE,
                                                      "editable", COLUMN_EDITABLE,
                                                      NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree_view), column);

    // XXXRGG: How do I set the default (vs minimum) width of a column?
    gtk_tree_view_column_set_min_width (column, 80);
    
    /* Url column */
    renderer = gtk_cell_renderer_text_new();

    g_signal_connect (G_OBJECT (renderer), "edited",
                      G_CALLBACK (hfd_cell_edited), NULL);
    g_object_set_data(G_OBJECT(renderer), "model", store);
    g_object_set_data(G_OBJECT(renderer), "column", (gint *)COLUMN_URL);
    
    column = gtk_tree_view_column_new_with_attributes(_("URI"),
                                                      renderer,
                                                      "text", COLUMN_URL,
                                                      "editable", COLUMN_EDITABLE,
                                                      NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree_view), column);
    
    /* Set data for new/delete button handlers */
    g_object_set_data(G_OBJECT(dialog), "favorites_list_ptr", (gpointer)favorites_list_ptr);
    g_object_set_data(G_OBJECT(dialog), "model",              (gpointer)store);
    g_object_set_data(G_OBJECT(dialog), "tree_view",          (gpointer)tree_view);

    info = g_new0(HXManageFavoritesDialog, 1);
    info->xml = xml;
    
    g_signal_connect (G_OBJECT (dialog), "destroy",
                      G_CALLBACK (hxplay_manage_favorites_dialog_destroy),
                      info);

    return GTK_DIALOG(dialog);
}


void hfd_new_favorite(GtkWidget* widget)
{
    GList* favorites_list;
    GList** favorites_list_ptr;
    GtkListStore* list_store;
    gpointer model_data;
    HXFavorite* favorite;
    GtkTreeIter tree_iter;
    GtkWidget* tree_view;
    GtkTreePath* path;
    
    GtkWidget* dialog = gtk_widget_get_toplevel(widget);
    
    favorites_list_ptr = (GList**)g_object_get_data(G_OBJECT(dialog), "favorites_list_ptr");
    favorites_list = *favorites_list_ptr;
    model_data = g_object_get_data(G_OBJECT(dialog), "model");
    list_store = GTK_LIST_STORE(model_data);
    tree_view = (GtkWidget*)g_object_get_data(G_OBJECT(dialog), "tree_view");

    favorite = hx_favorite_new();

    favorite->title = g_strdup(_("Untitled"));
    favorite->url = g_strdup("http://");

    favorites_list = g_list_append(favorites_list, favorite);
    
    gtk_list_store_append(list_store, &tree_iter);
    gtk_list_store_set (list_store, &tree_iter,
                        COLUMN_TITLE, favorite->title,
                        COLUMN_URL, favorite->url,
                        COLUMN_EDITABLE, TRUE,
                        COLUMN_FAVORITE, favorite,
                        -1);
    
    path = gtk_tree_model_get_path(GTK_TREE_MODEL(list_store),
                                   &tree_iter);
    
    gtk_tree_view_set_cursor(GTK_TREE_VIEW(tree_view), path, NULL, FALSE);
    gtk_tree_path_free(path);
    
    *favorites_list_ptr = favorites_list;
}

void hfd_delete_favorite(GtkWidget* widget)
{
    GList* favorites_list;
    GList** favorites_list_ptr;

    GList* favorites_link;
    GtkListStore* list_store;
    gpointer model_data;
    HXFavorite* favorite;
    GtkTreeIter tree_iter;
    GtkTreeIter* select_iter = NULL;
    GtkTreeIter* last_iter = NULL;
    GtkTreeSelection* selection;
    GtkWidget* tree_view;
    gboolean got_row;
    gboolean deleted_row = FALSE;    
    
    GtkWidget* dialog = gtk_widget_get_toplevel(widget);
    
    favorites_list_ptr = (GList**)g_object_get_data(G_OBJECT(dialog), "favorites_list_ptr");
    favorites_list = *favorites_list_ptr;
    tree_view = (GtkWidget*)g_object_get_data(G_OBJECT(dialog), "tree_view");
    model_data = g_object_get_data(G_OBJECT(dialog), "model");
    list_store = GTK_LIST_STORE(model_data);

    g_return_if_fail(list_store != NULL &&
                     favorites_list != NULL &&
                     model_data != NULL);
    
    selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));
    
    got_row = gtk_tree_model_get_iter_first(GTK_TREE_MODEL(list_store), &tree_iter);
    while(got_row)
    {
        if(gtk_tree_selection_iter_is_selected(selection, &tree_iter))
        {
            gtk_tree_model_get(GTK_TREE_MODEL(list_store), &tree_iter,
                               COLUMN_FAVORITE, &favorite,
                               -1);
            favorites_link = g_list_find(favorites_list, favorite);
            favorites_list = g_list_remove_link(favorites_list, favorites_link);

            hx_favorite_free(favorite);

            // Gtk 2.2:
            // got_row = gtk_list_store_remove(list_store, &tree_iter);

            gtk_list_store_remove(list_store, &tree_iter);
            got_row = tree_iter.stamp != 0;

            if(select_iter)
            {
                gtk_tree_iter_free(select_iter);
                select_iter = NULL;
            }

            if(got_row)
            {
                select_iter = gtk_tree_iter_copy(&tree_iter);
            }

            deleted_row = TRUE;
        }
        else
        {
            if(last_iter)
            {
                gtk_tree_iter_free(last_iter);
            }

            last_iter = gtk_tree_iter_copy(&tree_iter);

            got_row = gtk_tree_model_iter_next(GTK_TREE_MODEL(list_store), &tree_iter);
        }
    }

    if(deleted_row)
    {
        GtkTreePath* path;

        if(!select_iter)
        {
            select_iter = last_iter;
        }
        else
        {
            gtk_tree_iter_free(last_iter);            
        }
        
        if(select_iter)
        {
            path = gtk_tree_model_get_path(GTK_TREE_MODEL(list_store),
                                           select_iter);
    
            gtk_tree_view_set_cursor(GTK_TREE_VIEW(tree_view), path, NULL, FALSE);
            gtk_tree_path_free(path);
            gtk_tree_iter_free(select_iter);
            select_iter = NULL;
        }
    }

    *favorites_list_ptr = favorites_list;
}