As before https://stackoverflow.com/questions/41072683/gtk-menuitem-size-small,
菜单项对于我的用例来说太小了。
因此，我的问题是，“如何增加文本“保存”、“加载”和“退出”的字体大小？”
下面的代码能够更改“保存”文本的样式，只不过它是无法更改字体大小.
执行可执行文件时，出现以下警告：
Gtk-WARNING **: Theme parsing error: Styles.css:10:14: Junk at end of value
当线font-size: 25px;被删除（或注释掉），警告就会消失。
这可能看起来像font-size未在 GTK+3 中实现，但它被列为有效属性
https://developer.gnome.org/gtk3/stable/chap-css-properties.html#id-1.5.3.3.15 https://developer.gnome.org/gtk3/stable/chap-css-properties.html#id-1.5.3.3.15
所以问题仍然存在，“如何使用此方法增加字体大小？”
样式.css
/*
Valid Font Properties:
https://developer.gnome.org/gtk3/stable/chap-css-properties.html#id-1.5.3.3.15
*/
.Item_Save {
background: rgba(000, 255, 000, 1);
font-style: italic;
font-weight: 800;
font-size: 25px;
padding: 10px 10px 10px 10px;
}
C源文件
#include <gtk/gtk.h>
int main (int argc, char *argv[]) {
gtk_init(&argc, &argv);
GtkCssProvider* Provider = gtk_css_provider_new();
GdkDisplay* Display = gdk_display_get_default();
GdkScreen* Screen = gdk_display_get_default_screen(Display);
gtk_style_context_add_provider_for_screen(Screen, GTK_STYLE_PROVIDER(Provider), GTK_STYLE_PROVIDER_PRIORITY_USER);
gtk_css_provider_load_from_path(GTK_CSS_PROVIDER(Provider), "Styles.css", NULL);
GtkWidget* Window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
GtkWidget* MenuBar = gtk_menu_bar_new();
GtkWidget* MenuItem_File = gtk_menu_item_new_with_mnemonic("_File");
GtkWidget* SubMenu1 = gtk_menu_new();
GtkWidget* Item_Save = gtk_menu_item_new_with_mnemonic("_Save");
GtkWidget* Item_Load = gtk_menu_item_new_with_mnemonic("_Load");
GtkWidget* Item_Exit = gtk_menu_item_new_with_mnemonic("_Exit");
GtkStyleContext *Context;
Context = gtk_widget_get_style_context(Item_Save);
gtk_style_context_add_class(Context, "Item_Save");
gtk_menu_shell_append(GTK_MENU_SHELL(SubMenu1), Item_Save);
gtk_menu_shell_append(GTK_MENU_SHELL(SubMenu1), Item_Load);
gtk_menu_shell_append(GTK_MENU_SHELL(SubMenu1), gtk_separator_menu_item_new());
gtk_menu_shell_append(GTK_MENU_SHELL(SubMenu1), Item_Exit);
gtk_menu_item_set_submenu(GTK_MENU_ITEM(MenuItem_File), SubMenu1);
gtk_menu_shell_append(GTK_MENU_SHELL(MenuBar), MenuItem_File);
GtkWidget* VerticalBox;
VerticalBox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
gtk_box_pack_start(GTK_BOX(VerticalBox), MenuBar, false, false, 0);
gtk_container_add(GTK_CONTAINER(Window), VerticalBox);
gtk_widget_show_all(MenuBar);
gtk_widget_show(VerticalBox);
gtk_window_set_default_size(GTK_WINDOW(Window), 950, 600);
gtk_window_set_position(GTK_WINDOW(Window), GTK_WIN_POS_CENTER);
gtk_window_set_title(GTK_WINDOW(Window), "My Title");
gtk_widget_show(Window);
gtk_main();
return 0;
}
