API changes + additions

examples/support/mod.rs

@@ -1,55 +1,80 @@
 use glium::{DisplayBuild, Surface};
+use glium::backend::glutin_backend::GlutinFacade;
 use glium::glutin;
 use glium::glutin::{ElementState, Event, MouseButton, VirtualKeyCode};
 use imgui::{ImGui, Frame};
 use imgui::glium_renderer::Renderer;
 use time::SteadyTime;
 
-pub fn main_with_frame<'a, F: Fn(&Frame<'a>)>(f: F) {
-    let display = glutin::WindowBuilder::new()
-        .build_glium()
-        .unwrap();
+pub struct Support {
+    display: GlutinFacade,
+    imgui: ImGui,
+    renderer: Renderer,
+    last_frame: SteadyTime,
+    mouse_pos: (i32, i32),
+    mouse_pressed: (bool, bool, bool)
+}
 
-    let mut imgui = ImGui::init();
-    let mut renderer = Renderer::init(&mut imgui, &display).unwrap();
+impl Support {
+    pub fn init() -> Support {
+        let display = glutin::WindowBuilder::new()
+            .build_glium()
+            .unwrap();
 
-    let mut last_frame = SteadyTime::now();
-    let mut mouse_pos = (0, 0);
-    let mut mouse_pressed = (false, false, false);
+        let mut imgui = ImGui::init();
+        let renderer = Renderer::init(&mut imgui, &display).unwrap();
 
-    'main: loop {
+        Support {
+            display: display,
+            imgui: imgui,
+            renderer: renderer,
+            last_frame: SteadyTime::now(),
+            mouse_pos: (0, 0),
+            mouse_pressed: (false, false, false)
+        }
+    }
+
+    pub fn update_mouse(&mut self) {
+        self.imgui.set_mouse_pos(self.mouse_pos.0 as f32, self.mouse_pos.1 as f32);
+        self.imgui.set_mouse_down(&[self.mouse_pressed.0, self.mouse_pressed.1, self.mouse_pressed.2, false, false]);
+    }
+
+    pub fn render<'fr, 'a: 'fr , F: FnMut(&Frame<'fr>) -> bool>(
+            &'a mut self, clear_color: (f32, f32, f32, f32), mut f: F) -> bool {
+        let mut result;
         let now = SteadyTime::now();
-        let delta = now - last_frame;
+        let delta = now - self.last_frame;
         let delta_f = delta.num_nanoseconds().unwrap() as f32 / 1_000_000_000.0;
-        last_frame = now;
+        self.last_frame = now;
 
-        imgui.set_mouse_pos(mouse_pos.0 as f32, mouse_pos.1 as f32);
-        imgui.set_mouse_down(&[mouse_pressed.0, mouse_pressed.1, mouse_pressed.2, false, false]);
+        self.update_mouse();
 
-        let mut target = display.draw();
-        target.clear_color(1.0, 1.0, 1.0, 1.0);
+        let mut target = self.display.draw();
+        target.clear_color(clear_color.0, clear_color.1,
+                           clear_color.2, clear_color.3);
 
         let (width, height) = target.get_dimensions();
-        let frame = imgui.frame(width, height, delta_f);
-        f(&frame);
-        renderer.render(&mut target, frame).unwrap();
+        let frame = self.imgui.frame(width, height, delta_f);
+        result = f(&frame);
+        self.renderer.render(&mut target, frame).unwrap();
 
         target.finish().unwrap();
 
-        for event in display.poll_events() {
+        for event in self.display.poll_events() {
             match event {
                 Event::Closed |
                     Event::KeyboardInput(ElementState::Pressed, _, Some(VirtualKeyCode::Escape))
-                        => break 'main,
-                Event::MouseMoved(pos) => mouse_pos = pos,
-                Event::MouseInput(state, MouseButton::Left) =>
-                    mouse_pressed.0 = state == ElementState::Pressed,
-                Event::MouseInput(state, MouseButton::Right) =>
-                    mouse_pressed.1 = state == ElementState::Pressed,
-                Event::MouseInput(state, MouseButton::Middle) =>
-                    mouse_pressed.2 = state == ElementState::Pressed,
-                _ => ()
+                    => result = false,
+                    Event::MouseMoved(pos) => self.mouse_pos = pos,
+                    Event::MouseInput(state, MouseButton::Left) =>
+                        self.mouse_pressed.0 = state == ElementState::Pressed,
+                    Event::MouseInput(state, MouseButton::Right) =>
+                        self.mouse_pressed.1 = state == ElementState::Pressed,
+                    Event::MouseInput(state, MouseButton::Middle) =>
+                        self.mouse_pressed.2 = state == ElementState::Pressed,
+                    _ => ()
             }
         }
+        result
     }
 }

examples/test_window.rs

@@ -4,24 +4,166 @@ extern crate glium;
 extern crate imgui;
 extern crate time;
 
-use imgui::Frame;
+use imgui::*;
+
+use self::support::Support;
 
 mod support;
 
-fn main() {
-    // let mut show_app_metrics = false;
-    let show_app_main_menu_bar = true;
-
-    support::main_with_frame(|frame| {
-        // if show_app_metrics { show_metrics_window(&mut show_app_metrics) }
-        if show_app_main_menu_bar { show_example_app_main_menu_bar(frame) }
-    });
+struct State {
+    clear_color: (f32, f32, f32, f32),
+    show_app_metrics: bool,
+    show_app_main_menu_bar: bool,
+    show_app_console: bool,
+    show_app_layout: bool,
+    show_app_long_text: bool,
+    show_app_auto_resize: bool,
+    show_app_fixed_overlay: bool,
+    show_app_custom_rendering: bool,
+    show_app_manipulating_window_title: bool,
+    show_app_about: bool,
+    no_titlebar: bool,
+    no_border: bool,
+    no_resize: bool,
+    no_move: bool,
+    no_scrollbar: bool,
+    no_collapse: bool,
+    no_menu: bool,
+    bg_alpha: f32,
+    file_menu: FileMenuState
 }
 
-fn show_example_app_main_menu_bar<'a>(frame: &Frame<'a>) {
+impl Default for State {
+    fn default() -> Self {
+        State {
+            clear_color: (114.0 / 255.0, 144.0 / 255.0, 154.0 / 255.0, 1.0),
+            show_app_metrics: false,
+            show_app_main_menu_bar: false,
+            show_app_console: false,
+            show_app_layout: false,
+            show_app_long_text: false,
+            show_app_auto_resize: false,
+            show_app_fixed_overlay: false,
+            show_app_custom_rendering: false,
+            show_app_manipulating_window_title: false,
+            show_app_about: false,
+            no_titlebar: false,
+            no_border: false,
+            no_resize: false,
+            no_move: false,
+            no_scrollbar: false,
+            no_collapse: false,
+            no_menu: false,
+            bg_alpha: 0.65,
+            file_menu: Default::default()
+        }
+    }
+}
+
+struct FileMenuState {
+    enabled: bool
+}
+
+impl Default for FileMenuState {
+    fn default() -> Self {
+        FileMenuState {
+            enabled: true
+        }
+    }
+}
+
+fn main() {
+    let mut state = State {
+        .. Default::default()
+    };
+    let mut support = Support::init();
+
+    loop {
+        let active = support.render(state.clear_color, |frame| {
+            show_test_window(frame, &mut state)
+        });
+        if !active { break }
+    }
+}
+
+fn show_test_window<'a>(frame: &Frame<'a>, state: &mut State) -> bool {
+    if state.show_app_main_menu_bar { show_example_app_main_menu_bar(frame, state) }
+    if state.show_app_fixed_overlay {
+        state.show_app_fixed_overlay = show_example_app_fixed_overlay(frame);
+    }
+    if state.show_app_about {
+        state.show_app_about = frame.window()
+            .name(im_str!("About ImGui"))
+            .always_auto_resize(true)
+            .closable(true)
+            .build(|| {
+                frame.text(ImStr::from_str(&format!("ImGui {}", imgui::get_version())));
+                frame.separator();
+                frame.text(im_str!("By Omar Cornut and all github contributors."));
+                frame.text(im_str!("ImGui is licensed under the MIT License, see LICENSE for more information."));
+            })
+    }
+
+    frame.window().name(im_str!("ImGui Demo"))
+        .title_bar(!state.no_titlebar)
+        .show_borders(!state.no_border)
+        .resizable(!state.no_resize)
+        .movable(!state.no_move)
+        .scroll_bar(!state.no_scrollbar)
+        .collapsible(!state.no_collapse)
+        .menu_bar(!state.no_menu)
+        .bg_alpha(state.bg_alpha)
+        .size((550.0, 680.0), ImGuiSetCond_FirstUseEver)
+        .closable(true)
+        .build(|| {
+            frame.text(im_str!("ImGui says hello."));
+            frame.menu_bar(|| {
+                frame.menu(im_str!("Menu")).build(|| {
+                    show_example_menu_file(frame, &mut state.file_menu);
+                });
+                frame.menu(im_str!("Examples")).build(|| {
+                    if frame.menu_item(im_str!("Main menu bar")).build() {
+                        state.show_app_main_menu_bar = !state.show_app_main_menu_bar;
+                    }
+                    if frame.menu_item(im_str!("Console")).build() {
+                        state.show_app_console = !state.show_app_console;
+                    }
+                    if frame.menu_item(im_str!("Simple layout")).build() {
+                        state.show_app_layout = !state.show_app_layout;
+                    }
+                    if frame.menu_item(im_str!("Long text display")).build() {
+                        state.show_app_long_text = !state.show_app_long_text;
+                    }
+                    if frame.menu_item(im_str!("Auto-resizing window")).build() {
+                        state.show_app_auto_resize = !state.show_app_auto_resize;
+                    }
+                    if frame.menu_item(im_str!("Simple overlay")).build() {
+                        state.show_app_fixed_overlay = !state.show_app_fixed_overlay;
+                    }
+                    if frame.menu_item(im_str!("Manipulating window title")).build() {
+                        state.show_app_manipulating_window_title =
+                            !state.show_app_manipulating_window_title;
+                    }
+                    if frame.menu_item(im_str!("Custom rendering")).build() {
+                        state.show_app_custom_rendering = !state.show_app_custom_rendering;
+                    }
+                });
+                frame.menu(im_str!("Help")).build(|| {
+                    if frame.menu_item(im_str!("Metrics")).build() {
+                        state.show_app_metrics = !state.show_app_metrics;
+                    }
+                    if frame.menu_item(im_str!("About ImGui")).build() {
+                        state.show_app_about = !state.show_app_about;
+                    }
+                });
+            });
+        })
+}
+
+fn show_example_app_main_menu_bar<'a>(frame: &Frame<'a>, state: &mut State) {
     frame.main_menu_bar(|| {
         frame.menu(im_str!("File")).build(|| {
-            show_example_menu_file(frame);
+            show_example_menu_file(frame, &mut state.file_menu);
         });
         frame.menu(im_str!("Edit")).build(|| {
             if frame.menu_item(im_str!("Undo")).shortcut(im_str!("CTRL+Z")).build() { }
@@ -35,7 +177,7 @@ fn show_example_app_main_menu_bar<'a>(frame: &Frame<'a>) {
     });
 }
 
-fn show_example_menu_file<'a>(frame: &Frame<'a>) {
+fn show_example_menu_file<'a>(frame: &Frame<'a>, state: &mut FileMenuState) {
     frame.menu_item(im_str!("(dummy menu)")).enabled(false).build();
     if frame.menu_item(im_str!("New")).build() { }
     if frame.menu_item(im_str!("Open")).shortcut(im_str!("Ctrl+O")).build() { }
@@ -47,7 +189,7 @@ fn show_example_menu_file<'a>(frame: &Frame<'a>) {
             frame.menu_item(im_str!("Hello"));
             frame.menu_item(im_str!("Sailor"));
             frame.menu(im_str!("Recurse..")).build(|| {
-                show_example_menu_file(frame);
+                show_example_menu_file(frame, state);
             });
         });
     });
@@ -55,6 +197,9 @@ fn show_example_menu_file<'a>(frame: &Frame<'a>) {
     if frame.menu_item(im_str!("Save As..")).build() { }
     frame.separator();
     frame.menu(im_str!("Options")).build(|| {
+        if frame.menu_item(im_str!("Enabled")).selected(state.enabled).build() {
+            state.enabled = !state.enabled;
+        }
         // TODO
     });
     frame.menu(im_str!("Colors")).build(|| {
@@ -66,3 +211,20 @@ fn show_example_menu_file<'a>(frame: &Frame<'a>) {
     if frame.menu_item(im_str!("Checked")).selected(true).build() { }
     if frame.menu_item(im_str!("Quit")).shortcut(im_str!("Alt+F4")).build() { }
 }
+
+fn show_example_app_fixed_overlay<'a>(frame: &Frame<'a>) -> bool {
+    frame.window()
+        .name(im_str!("Example: Fixed Overlay"))
+        .closable(true)
+        .bg_alpha(0.3)
+        .title_bar(false)
+        .resizable(false)
+        .movable(false)
+        .save_settings(false)
+        .build(|| {
+            frame.text(im_str!("Simple overlay\non the top-left side of the screen."));
+            frame.separator();
+            let mouse_pos = frame.imgui().mouse_pos();
+            frame.text(im_str!("Mouse Position: ({:.1},{:.1})", mouse_pos.0, mouse_pos.1));
+        })
+}

src/ffi.rs

@@ -161,6 +161,13 @@ bitflags!(
    }
 );
 
+impl ImGuiWindowFlags {
+   #[inline]
+   pub fn with(self, mask: ImGuiWindowFlags, value: bool) -> ImGuiWindowFlags {
+      if value { self | mask } else { self - mask }
+   }
+}
+
 bitflags!(
    #[repr(C)]
    flags ImGuiSetCond: c_int {

src/lib.rs

@@ -11,16 +11,31 @@ extern crate libc;
 extern crate sdl2;
 
 use libc::{c_char, c_float, c_int, c_uchar};
-use std::marker::PhantomData;
+use std::borrow::Cow;
+use std::ffi::CStr;
 use std::mem;
 use std::ptr;
 use std::slice;
+use std::str;
 
-pub use ffi::{ImDrawIdx, ImDrawVert, ImGuiWindowFlags, ImVec2, ImVec4};
+pub use ffi::{
+   ImDrawIdx, ImDrawVert,
+   ImGuiSetCond,
+   ImGuiSetCond_Always, ImGuiSetCond_Once,
+   ImGuiSetCond_FirstUseEver, ImGuiSetCond_Appearing,
+   ImGuiWindowFlags,
+   ImGuiWindowFlags_NoTitleBar, ImGuiWindowFlags_NoResize, ImGuiWindowFlags_NoMove,
+   ImGuiWindowFlags_NoScrollbar, ImGuiWindowFlags_NoScrollWithMouse, ImGuiWindowFlags_NoCollapse,
+   ImGuiWindowFlags_AlwaysAutoResize, ImGuiWindowFlags_ShowBorders,
+   ImGuiWindowFlags_NoSavedSettings, ImGuiWindowFlags_NoInputs, ImGuiWindowFlags_MenuBar,
+   ImVec2, ImVec4
+};
 pub use menus::{Menu, MenuItem};
+pub use window::{Window};
 
 pub mod ffi;
 mod menus;
+mod window;
 
 #[cfg(feature = "glium")]
 pub mod glium_renderer;
@@ -29,20 +44,30 @@ pub struct ImGui;
 
 #[macro_export]
 macro_rules! im_str {
-   ($e:expr) => ({
+   ($e:tt) => ({
       let value = concat!($e, "\0");
       unsafe { ::imgui::ImStr::from_bytes(value.as_bytes()) }
    });
+   ($e:tt, $($arg:tt)*) => ({
+      ::imgui::ImStr::from_str(&format!($e, $($arg)*))
+   })
 }
 
 pub struct ImStr<'a> {
-   bytes: &'a [u8]
+   bytes: Cow<'a, [u8]>
 }
 
 impl<'a> ImStr<'a> {
    pub unsafe fn from_bytes(bytes: &'a [u8]) -> ImStr<'a> {
       ImStr {
-         bytes: bytes
+         bytes: Cow::Borrowed(bytes)
+      }
+   }
+   pub fn from_str(value: &str) -> ImStr<'a> {
+      let mut bytes: Vec<u8> = value.bytes().collect();
+      bytes.push(0);
+      ImStr {
+         bytes: Cow::Owned(bytes)
       }
    }
    fn as_ptr(&self) -> *const c_char { self.bytes.as_ptr() as *const c_char }
@@ -54,6 +79,13 @@ pub struct TextureHandle<'a> {
    pub pixels: &'a [c_uchar]
 }
 
+pub fn get_version() -> &'static str {
+   unsafe {
+      let bytes = CStr::from_ptr(ffi::igGetVersion()).to_bytes();
+      str::from_utf8_unchecked(bytes)
+   }
+}
+
 impl ImGui {
    pub fn init() -> ImGui {
       let io: &mut ffi::ImGuiIO = unsafe { mem::transmute(ffi::igGetIO()) };
@@ -80,6 +112,10 @@ impl ImGui {
       let io: &mut ffi::ImGuiIO = unsafe { mem::transmute(ffi::igGetIO()) };
       io.mouse_draw_cursor = value;
    }
+   pub fn mouse_pos(&self) -> (f32, f32) {
+      let io: &mut ffi::ImGuiIO = unsafe { mem::transmute(ffi::igGetIO()) };
+      (io.mouse_pos.x as f32, io.mouse_pos.y as f32)
+   }
    pub fn set_mouse_pos(&mut self, x: f32, y: f32) {
       let io: &mut ffi::ImGuiIO = unsafe { mem::transmute(ffi::igGetIO()) };
       io.mouse_pos.x = x;
@@ -89,7 +125,7 @@ impl ImGui {
       let io: &mut ffi::ImGuiIO = unsafe { mem::transmute(ffi::igGetIO()) };
       io.mouse_down = *states;
    }
-   pub fn frame<'a>(&mut self, width: u32, height: u32, delta_time: f32) -> Frame<'a> {
+   pub fn frame<'fr, 'a: 'fr>(&'a mut self, width: u32, height: u32, delta_time: f32) -> Frame<'fr> {
       unsafe {
          let io: &mut ffi::ImGuiIO = mem::transmute(ffi::igGetIO());
          io.display_size.x = width as c_float;
@@ -99,7 +135,7 @@ impl ImGui {
          ffi::igNewFrame();
       }
       Frame {
-         _phantom: PhantomData
+         imgui: self
       }
    }
 }
@@ -136,7 +172,7 @@ pub struct DrawList<'a> {
 }
 
 pub struct Frame<'fr> {
-   _phantom: PhantomData<&'fr ImGui>
+   imgui: &'fr ImGui
 }
 
 static FMT: &'static [u8] = b"%s\0";
@@ -144,6 +180,7 @@ static FMT: &'static [u8] = b"%s\0";
 fn fmt_ptr() -> *const c_char { FMT.as_ptr() as *const c_char }
 
 impl<'fr> Frame<'fr> {
+   pub fn imgui(&self) -> &ImGui { self.imgui }
    pub fn render<F, E>(self, mut f: F) -> Result<(), E>
          where F: FnMut(DrawList<'fr>) -> Result<(), E> {
       unsafe {
@@ -173,6 +210,11 @@ impl<'fr> Frame<'fr> {
    }
 }
 
+// Window
+impl<'fr> Frame<'fr> {
+   pub fn window<'p>(&self) -> Window<'fr, 'p> { Window::new() }
+}
+
 // Widgets
 impl<'fr> Frame<'fr> {
    pub fn text<'b>(&self, text: ImStr<'b>) {

src/menus.rs

@@ -18,6 +18,7 @@ impl<'fr, 'p> Menu<'fr, 'p> {
          _phantom: PhantomData
       }
    }
+   #[inline]
    pub fn enabled(self, enabled: bool) -> Self {
       Menu {
          enabled: enabled,
@@ -51,18 +52,21 @@ impl<'fr, 'p> MenuItem<'fr, 'p> {
          _phantom: PhantomData
       }
    }
+   #[inline]
    pub fn shortcut(self, shortcut: ImStr<'p>) -> Self {
       MenuItem {
          shortcut: Some(shortcut),
          .. self
       }
    }
+   #[inline]
    pub fn selected(self, selected: bool) -> Self {
       MenuItem {
          selected: selected,
          .. self
       }
    }
+   #[inline]
    pub fn enabled(self, enabled: bool) -> Self {
       MenuItem {
          enabled: enabled,

src/window.rs

@@ -0,0 +1,183 @@
+use libc::c_float;
+use std::marker::PhantomData;
+use std::ptr;
+
+use super::ffi;
+use super::{
+   Frame,
+   ImGuiSetCond,
+   ImGuiWindowFlags,
+   ImGuiWindowFlags_NoTitleBar, ImGuiWindowFlags_NoResize, ImGuiWindowFlags_NoMove,
+   ImGuiWindowFlags_NoScrollbar, ImGuiWindowFlags_NoScrollWithMouse, ImGuiWindowFlags_NoCollapse,
+   ImGuiWindowFlags_AlwaysAutoResize, ImGuiWindowFlags_ShowBorders,
+   ImGuiWindowFlags_NoSavedSettings, ImGuiWindowFlags_NoInputs, ImGuiWindowFlags_MenuBar,
+   ImStr, ImVec2
+};
+
+pub struct Window<'fr, 'p> {
+   pos: (f32, f32),
+   pos_cond: ImGuiSetCond,
+   size: (f32, f32),
+   size_cond: ImGuiSetCond,
+   name: ImStr<'p>,
+   closable: bool,
+   bg_alpha: f32,
+   flags: ImGuiWindowFlags,
+   _phantom: PhantomData<&'fr Frame<'fr>>
+}
+
+impl<'fr, 'p> Window<'fr, 'p> {
+   pub fn new() -> Window<'fr, 'p> {
+      Window {
+         pos: (0.0, 0.0),
+         pos_cond: ImGuiSetCond::empty(),
+         size: (0.0, 0.0),
+         size_cond: ImGuiSetCond::empty(),
+         name: unsafe { ImStr::from_bytes(b"Debug\0") },
+         closable: false,
+         bg_alpha: -1.0,
+         flags: ImGuiWindowFlags::empty(),
+         _phantom: PhantomData
+      }
+   }
+   #[inline]
+   pub fn position(self, pos: (f32, f32), cond: ImGuiSetCond) -> Self {
+      Window {
+         pos: pos,
+         pos_cond: cond,
+         .. self
+      }
+   }
+   #[inline]
+   pub fn size(self, size: (f32, f32), cond: ImGuiSetCond) -> Self {
+      Window {
+         size: size,
+         size_cond: cond,
+         .. self
+      }
+   }
+   #[inline]
+   pub fn name(self, name: ImStr<'p>) -> Self {
+      Window {
+         name: name,
+         .. self
+      }
+   }
+   #[inline]
+   pub fn closable(self, closable: bool) -> Self {
+      Window {
+         closable: closable,
+         .. self
+      }
+   }
+   #[inline]
+   pub fn bg_alpha(self, bg_alpha: f32) -> Self {
+      Window {
+         bg_alpha: bg_alpha,
+         .. self
+      }
+   }
+   pub fn flags(self, flags: ImGuiWindowFlags) -> Self {
+      Window {
+         flags: flags,
+         .. self
+      }
+   }
+   #[inline]
+   pub fn title_bar(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoTitleBar, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn resizable(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoResize, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn movable(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoMove, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn scroll_bar(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoScrollbar, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn scrollable(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoScrollWithMouse, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn collapsible(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoCollapse, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn always_auto_resize(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_AlwaysAutoResize, value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn show_borders(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_ShowBorders, value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn save_settings(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoSavedSettings, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn inputs(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_NoInputs, !value),
+         .. self
+      }
+   }
+   #[inline]
+   pub fn menu_bar(self, value: bool) -> Self {
+      Window {
+         flags: self.flags.with(ImGuiWindowFlags_MenuBar, value),
+         .. self
+      }
+   }
+   pub fn build<F: FnOnce()>(self, f: F) -> bool {
+      let mut opened = true;
+      let render = unsafe {
+         if !self.pos_cond.is_empty() {
+            ffi::igSetNextWindowPos(ImVec2::new(self.pos.0, self.pos.1), self.pos_cond);
+         }
+         if !self.size_cond.is_empty() {
+            ffi::igSetNextWindowSize(ImVec2::new(self.size.0, self.size.1), self.size_cond);
+         }
+         ffi::igBegin2(self.name.as_ptr(),
+            if self.closable { &mut opened } else { ptr::null_mut() },
+            ImVec2::new(0.0, 0.0), self.bg_alpha as c_float, self.flags
+         )
+      };
+      if render {
+         f();
+      }
+      unsafe { ffi::igEnd() };
+      opened
+   }
+}