elias/imgui-rs
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Unsafe function to get the "current UI" out of thin air

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This commit is contained in:
Joonas Javanainen 2015-09-27 15:57:08 +03:00
parent 21dca8bae6
commit 91eec219f6
1 changed files with 17 additions and 2 deletions
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19
src/lib.rs
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@ -233,7 +233,12 @@ impl ImGui {
io.display_size.y = height as c_float;
io.delta_time = delta_time;
}
unsafe { imgui_sys::igNewFrame() };
unsafe {
imgui_sys::igNewFrame();
CURRENT_UI = Some(Ui {
imgui: mem::transmute(self as &'a ImGui)
});
}
Ui {
imgui: self
}
@ -243,11 +248,14 @@ impl ImGui {
impl Drop for ImGui {
fn drop(&mut self) {
unsafe {
CURRENT_UI = None;
imgui_sys::igShutdown();
}
}
}
static mut CURRENT_UI: Option<Ui<'static>> = None;
#[cfg(feature = "sdl2")]
impl ImGui {
pub fn update_mouse(&mut self, mouse: &::sdl2::mouse::MouseUtil) {
@ -315,7 +323,7 @@ impl<'ui> Ui<'ui> {
let mut im_draw_data = mem::zeroed();
RENDER_DRAW_LISTS_STATE.0 = &mut im_draw_data;
imgui_sys::igRender();
RENDER_DRAW_LISTS_STATE.0 = 0 as *mut imgui_sys::ImDrawData;
RENDER_DRAW_LISTS_STATE.0 = ptr::null_mut();
for &cmd_list in im_draw_data.cmd_lists() {
let draw_list =
@ -326,6 +334,7 @@ impl<'ui> Ui<'ui> {
};
try!(f(draw_list));
}
CURRENT_UI = None;
}
Ok(())
}
@ -350,6 +359,12 @@ impl<'ui> Ui<'ui> {
}
}
impl<'a> Ui<'a> {
pub unsafe fn current_ui() -> Option<&'a Ui<'a>> {
CURRENT_UI.as_ref()
}
}
// Window
impl<'ui> Ui<'ui> {
pub fn window<'p>(&self) -> Window<'ui, 'p> { Window::new() }