如果您在EMS或设置%字体大小时,将立足于默认的字体大小。诀窍是根据窗口大小更改默认字体大小。连接到窗口的configure_event
,并调整窗口大小时设置新的默认字体大小。
这里有一个简单的例子:
const string WINDOW_CSS_TEMPLATE = "#mywindow { font-size: %fpx; }";
const string APPLICATION_CSS = "#mywindow .label { font-size: 5em; }";
void main(string [] args) {
Gtk.init(ref args);
var win = new Gtk.Window();
win.name = "mywindow";
win.default_width = 800;
win.default_height = 600;
var label = new Gtk.Label("Some text");
label.halign = Gtk.Align.END;
label.valign = Gtk.Align.END;
win.add(label);
win.destroy.connect(Gtk.main_quit);
var win_provider = new Gtk.CssProvider();
Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(),
win_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
var app_provider = new Gtk.CssProvider();
try {
app_provider.load_from_data(APPLICATION_CSS, -1);
} catch (Error e) {
Process.exit(1);
}
Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(),
app_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
win.configure_event.connect((event) => {
try {
// Replace this with your desired calculation of the base font size
var target_size = (double) event.height/600.0 * 12.0;
var css = WINDOW_CSS_TEMPLATE.printf(target_size);
win_provider.load_from_data(css, -1);
} catch (Error e) {
Process.exit(1);
}
return Gdk.EVENT_PROPAGATE;
});
win.show_all();
Gtk.main();
}
此只关心窗口的高度,因此,如果您调整窗口会更宽比它高,你会得到一个unreadably微小的标签,但你可以插入任何计算工作给你。
完美地工作。就我而言,我们保证永远不会改变窗口大小,所以我[在没有事件的情况下实现您的解决方案](https://github.com/andybarry/pdfpc/commit/19e279cf0a9f6f6bcc89c79185f7bf1bdf305c2b) – abarry