Update examples

examples/demo.rs

@@ -4,7 +4,7 @@ use sdl2::pixels::Color;
 use sdl2::keycode::KeyCode;
 
 pub fn main() {
-    let sdl_context = sdl2::init().video().unwrap();
+    let mut sdl_context = sdl2::init().video().unwrap();
 
     let window = sdl_context.window("rust-sdl2 demo: Video", 800, 600)
         .position_centered()
@@ -20,10 +20,9 @@ pub fn main() {
     drawer.present();
 
     let mut running = true;
-    let mut event_pump = sdl_context.event_pump();
 
     while running {
-        for event in event_pump.poll_iter() {
+        for event in sdl_context.event_pump().poll_iter() {
             use sdl2::event::Event;
 
             match event {

examples/game_controller.rs

@@ -4,7 +4,7 @@ use sdl2::{joystick, controller};
 use sdl2::controller::GameController;
 
 fn main() {
-    let sdl_context = sdl2::init().game_controller().unwrap();
+    let mut sdl_context = sdl2::init().game_controller().unwrap();
 
     let available =
         match joystick::num_joysticks() {
@@ -46,9 +46,7 @@ fn main() {
 
     println!("Controller mapping: {}", controller.mapping());
 
-    let mut event_pump = sdl_context.event_pump();
-
-    for event in event_pump.wait_iter() {
+    for event in sdl_context.event_pump().wait_iter() {
         use sdl2::event::Event;
 
         match event {

examples/joystick.rs

@@ -3,7 +3,7 @@ extern crate sdl2;
 use sdl2::joystick::{Joystick, num_joysticks};
 
 fn main() {
-    let sdl_context = sdl2::init().joystick().unwrap();
+    let mut sdl_context = sdl2::init().joystick().unwrap();
 
     let available =
         match num_joysticks() {
@@ -32,9 +32,7 @@ fn main() {
         panic!("Couldn't open any joystick");
     };
 
-    let mut event_pump = sdl_context.event_pump();
-
-    for event in event_pump.wait_iter() {
+    for event in sdl_context.event_pump().wait_iter() {
         use sdl2::event::Event;
 
         match event {

examples/renderer-texture.rs

@@ -5,7 +5,7 @@ use sdl2::rect::Rect;
 use sdl2::keycode::KeyCode;
 
 pub fn main() {
-    let sdl_context = sdl2::init().video().unwrap();
+    let mut sdl_context = sdl2::init().video().unwrap();
 
     let window = sdl_context.window("rust-sdl2 demo: Video", 800, 600)
         .position_centered()
@@ -35,10 +35,9 @@ pub fn main() {
     drawer.present();
 
     let mut running = true;
-    let mut event_pump = sdl_context.event_pump();
 
     while running {
-        for event in event_pump.poll_iter() {
+        for event in sdl_context.event_pump().poll_iter() {
             use sdl2::event::Event;
 
             match event {

examples/renderer-yuv.rs

@@ -5,7 +5,7 @@ use sdl2::rect::Rect;
 use sdl2::keycode::KeyCode;
 
 pub fn main() {
-    let sdl_context = sdl2::init().video().unwrap();
+    let mut sdl_context = sdl2::init().video().unwrap();
 
     let window = sdl_context.window("rust-sdl2 demo: Video", 800, 600)
         .position_centered()
@@ -51,10 +51,9 @@ pub fn main() {
     drawer.present();
 
     let mut running = true;
-    let mut event_pump = sdl_context.event_pump();
 
     while running {
-        for event in event_pump.poll_iter() {
+        for event in sdl_context.event_pump().poll_iter() {
             use sdl2::event::Event;
 
             match event {

examples/window-properties.rs

@@ -0,0 +1,52 @@
+extern crate sdl2;
+
+use sdl2::pixels::Color;
+
+pub fn main() {
+    let mut sdl_context = sdl2::init().video().unwrap();
+
+    let window = sdl_context.window("rust-sdl2 demo: Window", 800, 600)
+        .resizable()
+        .build()
+        .unwrap();
+
+    let mut renderer = window.renderer().present_vsync().build().unwrap();
+
+    let mut running = true;
+    let mut tick = 0;
+
+    while running {
+        for event in sdl_context.event_pump().poll_iter() {
+            use sdl2::event::Event;
+            use sdl2::keycode::KeyCode;
+
+            match event {
+                Event::Quit {..} | Event::KeyDown { keycode: KeyCode::Escape, .. } => {
+                    running = false
+                },
+                _ => {}
+            }
+        }
+
+        {
+            // Update the window title.
+            // &sdl_context is needed to safely access the Window and to ensure that the event loop
+            // isn't running (which could mutate the Window).
+
+            // Note: if you don't use renderer: window.properties(&sdl_context);
+            let mut props = renderer.window_properties(&sdl_context).unwrap();
+
+            let position = props.get_position();
+            let size = props.get_size();
+            let title = format!("Window - pos({}x{}), size({}x{}): {}", position.0, position.1, size.0, size.1, tick);
+            props.set_title(&title).unwrap();
+
+            tick += 1;
+        }
+
+        let mut drawer = renderer.drawer();
+        drawer.set_draw_color(Color::RGB(0, 0, 0));
+        drawer.clear();
+        drawer.present();
+    }
+}