From a908c109c09cbb54962bb5b3a5056c188fe260e7 Mon Sep 17 00:00:00 2001
From: Nikolay Zapolnov <zapolnov@gmail.com>
Date: Sun, 31 Jan 2016 22:08:35 +0100
Subject: [PATCH] Added flag for selectables to handle double clicks.

---
 imgui.cpp        |  7 ++++++-
 imgui.h          |  3 ++-
 imgui_demo.cpp   |  7 ++++++-
 imgui_internal.h | 25 +++++++++++++------------
 4 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index 8f55e6bf..22300c3e 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -5222,7 +5222,11 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
         SetHoveredID(id);
         if (!(flags & ImGuiButtonFlags_NoKeyModifiers) || (!g.IO.KeyCtrl && !g.IO.KeyShift && !g.IO.KeyAlt))
         {
-            if (g.IO.MouseClicked[0])
+            if (g.IO.MouseDoubleClicked[0] && (flags & ImGuiButtonFlags_PressedOnDoubleClick))
+            {
+                pressed = true;
+            }
+            else if (g.IO.MouseClicked[0])
             {
                 if (flags & ImGuiButtonFlags_PressedOnClick)
                 {
@@ -8135,6 +8139,7 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
     if (flags & ImGuiSelectableFlags_Menu) button_flags |= ImGuiButtonFlags_PressedOnClick;
     if (flags & ImGuiSelectableFlags_MenuItem) button_flags |= ImGuiButtonFlags_PressedOnClick|ImGuiButtonFlags_PressedOnRelease;
     if (flags & ImGuiSelectableFlags_Disabled) button_flags |= ImGuiButtonFlags_Disabled;
+    if (flags & ImGuiSelectableFlags_HandleDoubleClick) button_flags |= ImGuiButtonFlags_PressedOnDoubleClick;
     bool hovered, held;
     bool pressed = ButtonBehavior(bb_with_spacing, id, &hovered, &held, button_flags);
     if (flags & ImGuiSelectableFlags_Disabled)
diff --git a/imgui.h b/imgui.h
index a6a249d0..ba3ba9a5 100644
--- a/imgui.h
+++ b/imgui.h
@@ -504,7 +504,8 @@ enum ImGuiSelectableFlags_
 {
     // Default: 0
     ImGuiSelectableFlags_DontClosePopups    = 1 << 0,   // Clicking this don't close parent popup window
-    ImGuiSelectableFlags_SpanAllColumns     = 1 << 1    // Selectable frame can span all columns (text will still fit in current column)
+    ImGuiSelectableFlags_SpanAllColumns     = 1 << 1,   // Selectable frame can span all columns (text will still fit in current column)
+    ImGuiSelectableFlags_HandleDoubleClick  = 1 << 2    // Generate press events on double clicks too
 };
 
 // User fill ImGuiIO.KeyMap[] array with indices into the ImGuiIO.KeysDown[512] array
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index 46883706..26d33ead 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -392,11 +392,16 @@ void ImGui::ShowTestWindow(bool* p_opened)
         {
             if (ImGui::TreeNode("Basic"))
             {
-                static bool selected[3] = { false, true, false };
+                static bool selected[4] = { false, true, false, false };
                 ImGui::Selectable("1. I am selectable", &selected[0]);
                 ImGui::Selectable("2. I am selectable", &selected[1]);
                 ImGui::Text("3. I am not selectable");
                 ImGui::Selectable("4. I am selectable", &selected[2]);
+                if (ImGui::Selectable("5. I am double clickable", selected[3], ImGuiSelectableFlags_HandleDoubleClick))
+                {
+                    if (ImGui::IsMouseDoubleClicked(0))
+                        selected[3] = !selected[3];
+                }
                 ImGui::TreePop();
             }
             if (ImGui::TreeNode("Rendering more text into the same block"))
diff --git a/imgui_internal.h b/imgui_internal.h
index c8748ada..b3c84e66 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -152,14 +152,15 @@ inline void operator delete(void*, ImPlacementNewDummy, void*) {}
 
 enum ImGuiButtonFlags_
 {
-    ImGuiButtonFlags_Repeat             = 1 << 0,
-    ImGuiButtonFlags_PressedOnClick     = 1 << 1,   // return pressed on click only (default requires click+release)
-    ImGuiButtonFlags_PressedOnRelease   = 1 << 2,   // return pressed on release only (default requires click+release)
-    ImGuiButtonFlags_FlattenChilds      = 1 << 3,
-    ImGuiButtonFlags_DontClosePopups    = 1 << 4,
-    ImGuiButtonFlags_Disabled           = 1 << 5,
-    ImGuiButtonFlags_AlignTextBaseLine  = 1 << 6,
-    ImGuiButtonFlags_NoKeyModifiers     = 1 << 7
+    ImGuiButtonFlags_Repeat                 = 1 << 0,
+    ImGuiButtonFlags_PressedOnClick         = 1 << 1,   // return pressed on click only (default requires click+release)
+    ImGuiButtonFlags_PressedOnRelease       = 1 << 2,   // return pressed on release only (default requires click+release)
+    ImGuiButtonFlags_FlattenChilds          = 1 << 3,
+    ImGuiButtonFlags_DontClosePopups        = 1 << 4,
+    ImGuiButtonFlags_Disabled               = 1 << 5,
+    ImGuiButtonFlags_AlignTextBaseLine      = 1 << 6,
+    ImGuiButtonFlags_NoKeyModifiers         = 1 << 7,
+    ImGuiButtonFlags_PressedOnDoubleClick   = 1 << 8
 };
 
 enum ImGuiTreeNodeFlags_
@@ -176,10 +177,10 @@ enum ImGuiSliderFlags_
 enum ImGuiSelectableFlagsPrivate_
 {
     // NB: need to be in sync with last value of ImGuiSelectableFlags_
-    ImGuiSelectableFlags_Menu               = 1 << 2,
-    ImGuiSelectableFlags_MenuItem           = 1 << 3,
-    ImGuiSelectableFlags_Disabled           = 1 << 4,
-    ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 5
+    ImGuiSelectableFlags_Menu               = 1 << 3,
+    ImGuiSelectableFlags_MenuItem           = 1 << 4,
+    ImGuiSelectableFlags_Disabled           = 1 << 5,
+    ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 6
 };
 
 // FIXME: this is in development, not exposed/functional as a generic feature yet.