From 9e78e860000a14e1609d09adf4a0c1cd1b5527a6 Mon Sep 17 00:00:00 2001
From: Cameron Hart <cam@bitshifter.net.nz>
Date: Sun, 17 Jan 2016 20:05:30 +1100
Subject: [PATCH] Add support for popups and selectable widgets.

---
 examples/test_window_impl.rs | 26 ++++++++++++++++++++++++++
 src/lib.rs                   | 23 +++++++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/examples/test_window_impl.rs b/examples/test_window_impl.rs
index 28a645c..e2bcfb9 100644
--- a/examples/test_window_impl.rs
+++ b/examples/test_window_impl.rs
@@ -44,6 +44,7 @@ struct State {
     vec3i: [i32;3],
     col1: [f32;3],
     col2: [f32;4],
+    selected_fish: Option<usize>,
     auto_resize_state: AutoResizeState,
     file_menu: FileMenuState
 }
@@ -90,6 +91,7 @@ impl Default for State {
             vec3i: [10, 20, 30],
             col1: [1.0, 0.0, 0.2],
             col2: [0.4, 0.7, 0.0, 0.5],
+            selected_fish: None,
             auto_resize_state: Default::default(),
             file_menu: Default::default()
         }
@@ -335,6 +337,30 @@ fn show_test_window<'a>(ui: &Ui<'a>, state: &mut State, opened: &mut bool) {
                     ui.spacing();
                 });
             }
+            if ui.collapsing_header(im_str!("Popups & Modal windows")).build() {
+                ui.tree_node(im_str!("Popups")).build(|| {
+                    ui.text_wrapped(im_str!("When a popup is active, it inhibits interacting with windows that are behind the popup. Clicking outside the popup closes it."));
+                    let names = [im_str!("Bream"), im_str!("Haddock"), im_str!("Mackerel"), im_str!("Pollock"), im_str!("Tilefish")];
+                    if ui.small_button(im_str!("Select..")) {
+                        ui.open_popup(im_str!("select"));
+                    }
+                    ui.same_line(0.0);
+                    ui.text(
+                        match state.selected_fish {
+                            Some(index) => names[index].clone(),
+                            None => im_str!("<None>")
+                        });
+                    ui.popup(im_str!("select"), || {
+                        ui.text(im_str!("Aquarium"));
+                        ui.separator();
+                        for (index, name) in names.iter().enumerate() {
+                            if ui.selectable(name.clone()) {
+                                state.selected_fish = Some(index);
+                            }
+                        }
+                    });
+                });
+            }
         })
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index aae068c..5341feb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,6 +24,8 @@ pub use imgui_sys::{
     ImGuiInputTextFlags_AllowTabInput, ImGuiInputTextFlags_CtrlEnterForNewLine,
     ImGuiInputTextFlags_NoHorizontalScroll, ImGuiInputTextFlags_AlwaysInsertMode,
     ImGuiInputTextFlags_ReadOnly,
+    ImGuiSelectableFlags,
+    ImGuiSelectableFlags_DontClosePopups, ImGuiSelectableFlags_SpanAllColumns,
     ImGuiSetCond,
     ImGuiSetCond_Always, ImGuiSetCond_Once,
     ImGuiSetCond_FirstUseEver, ImGuiSetCond_Appearing,
@@ -518,6 +520,13 @@ impl<'ui> Ui<'ui> {
     }
 }
 
+// Widgets: Selectable / Lists
+impl<'ui> Ui<'ui> {
+    pub fn selectable<'p>(&self, label: ImStr<'p>) -> bool {
+        unsafe { imgui_sys::igSelectable(label.as_ptr(), false, ImGuiSelectableFlags::empty(), ImVec2::new(0.0,0.0)) }
+    }
+}
+
 // Widgets: Menus
 impl<'ui> Ui<'ui> {
     pub fn main_menu_bar<F>(&self, f: F) where F: FnOnce() {
@@ -537,3 +546,17 @@ impl<'ui> Ui<'ui> {
     pub fn menu<'p>(&self, label: ImStr<'p>) -> Menu<'ui, 'p> { Menu::new(label) }
     pub fn menu_item<'p>(&self, label: ImStr<'p>) -> MenuItem<'ui, 'p> { MenuItem::new(label) }
 }
+
+// Widgets: Popups
+impl<'ui> Ui<'ui> {
+    pub fn open_popup<'p>(&self, str_id: ImStr<'p>) {
+        unsafe { imgui_sys::igOpenPopup(str_id.as_ptr()) };
+    }
+    pub fn popup<'p, F>(&self, str_id: ImStr<'p>, f: F) where F: FnOnce() {
+        let render = unsafe { imgui_sys::igBeginPopup(str_id.as_ptr()) };
+        if render {
+            f();
+            unsafe { imgui_sys::igEndPopup() };
+        }
+    }
+}