worked on rendering code

worked on code for libgui for rendering a user interface

src/system/kernel/interrupts.rs

@@ -19,7 +19,7 @@ extern "x86-interrupt" fn double_fault_handler(stack_frame: InterruptStackFrame,
 	panic!("EXCEPTION: double fault\n{:#?}", stack_frame)
 }
 
-extern "x86-interrupt" fn timer_interrupt_handler(stack_frame: InterruptStackFrame) {
+extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFrame) {
 	unsafe {
 		GLOBALTIMER.lock().inc();
 		PICS.lock().notify_end_of_interrupt(InterruptIndex::Timer.as_u8());

src/system/kernel/render.rs

@@ -186,7 +186,10 @@ impl Renderer {
 			'┐' => 191,
 			'└' => 192,
 			'┘' => 217,
-			'┌' => 218,		
+			'┌' => 218,
+			'┼' => 197,	
+			'░' => 176,
+ 			'▓' => 178,
 			_ => { return None; }
 		};
 		Some(res)

src/system/std/io.rs

@@ -52,11 +52,14 @@ pub struct Element {
     frame: Vec<Vec<char>>,
     dimensions: (u8, u8)
 }
+
 /// elements can be created using their from_str() method
 /// you can then render the element to the current frame using the render() method
 /// the position of the element by passing a tuple (x,y) to render()
 /// 
-/// nothing will appear on the screen until the frame is actually
+/// nothing will appear on the screen until the frame is actually rendered by
+/// the render_frame method on the renderer
+
 impl Element {
     pub fn from_str(elemstr: String) -> Self {
         let mut element = Element { frame: Vec::<Vec<char>>::new(), dimensions: (0, 0) }; 

src/system/std/random.rs

@@ -1,5 +1,5 @@
 
-use alloc::{boxed::Box, string::{String, ToString}, vec::Vec};
+use alloc::{string::{String, ToString}, vec::Vec};
 use rand::{Rng, SeedableRng, rngs::SmallRng, RngCore};
 use spin::Mutex;
 use lazy_static::lazy_static;