wgui: use dark mode

uidev/assets/gui/various_widgets.xml

@@ -1,7 +1,7 @@
 <layout>
   <elements>
     <rectangle
-      color="#AAAAAA"
+      color="#888888"
       width="1000" height="500" min_width="1000" min_height="500"
       gap="4" flex_direction="column"
       overflow_y="scroll">
@@ -24,7 +24,7 @@
           <CheckBox text="i'm checked by default" checked="1" />
         </div>
 
-        <label text="custom attrib test, you should see size rectangles below, each of them in R, G and B (if TESTBED is generic)" />
+        <label text="custom attrib test, you should see size rectangles below, each of them in R, G and B (if TESTBED is not set)" />
         <div flex_direction="row" gap="8">
           <label text="lighter:" />
 

uidev/src/testbed/testbed_any.rs

@@ -21,7 +21,13 @@ impl TestbedAny {
 	pub fn new(name: &str, listeners: &mut EventListenerCollection<(), ()>) -> anyhow::Result<Self> {
 		let path = format!("gui/{name}.xml");
 
-		let globals = WguiGlobals::new(Box::new(assets::Asset {}), Default::default())?;
+		let globals = WguiGlobals::new(
+			Box::new(assets::Asset {}),
+			wgui::globals::Defaults {
+				dark_mode: true,
+				text_color: wgui::drawing::Color::new(1.0, 1.0, 1.0, 1.0),
+			},
+		)?;
 
 		let (layout, state) = wgui::parser::new_layout_from_assets(
 			listeners,

uidev/src/testbed/testbed_generic.rs

@@ -59,7 +59,13 @@ impl TestbedGeneric {
 	pub fn new(listeners: &mut EventListenerCollection<(), ()>) -> anyhow::Result<Self> {
 		const XML_PATH: &str = "gui/various_widgets.xml";
 
-		let globals = WguiGlobals::new(Box::new(assets::Asset {}), Default::default())?;
+		let globals = WguiGlobals::new(
+			Box::new(assets::Asset {}),
+			wgui::globals::Defaults {
+				text_color: wgui::drawing::Color::new(1.0, 1.0, 1.0, 1.0),
+				dark_mode: true,
+			},
+		)?;
 
 		let extra = ParseDocumentExtra {
 			on_custom_attribs: Some(Box::new(move |par| {