From 26174cba8532e6f56f54077e628b67650fcf02cf Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Wed, 21 Jan 2015 23:03:25 +0100
Subject: [PATCH] Added InvisibleButton()

---
 imgui.cpp | 23 +++++++++++++++++++++++
 imgui.h   |  1 +
 2 files changed, 24 insertions(+)

diff --git a/imgui.cpp b/imgui.cpp
index 0b46400f..522f5d28 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -3599,6 +3599,29 @@ bool ImGui::SmallButton(const char* label)
     return pressed;
 }
 
+// Tip: use ImGui::PushID()/PopID() to push indices or pointers in the ID stack.
+// Then you can keep 'str_id' empty or the same for all your buttons (instead of creating a string based on a non-string id)
+bool ImGui::InvisibleButton(const char* str_id, const ImVec2& size)
+{
+    ImGuiState& g = GImGui;
+    ImGuiWindow* window = GetCurrentWindow();
+    if (window->SkipItems)
+        return false;
+
+    const ImGuiAabb bb(window->DC.CursorPos, window->DC.CursorPos + size);
+    ItemSize(bb);
+
+    if (ClipAdvance(bb))
+        return false;
+
+    const ImGuiID id = window->GetID(str_id);
+
+	bool hovered, held;
+    bool pressed = ButtonBehaviour(bb, id, &hovered, &held, true);
+
+    return pressed;
+}
+
 // Upper-right button to close a window.
 static bool CloseWindowButton(bool* p_opened)
 {
diff --git a/imgui.h b/imgui.h
index e845c158..b77df3c4 100644
--- a/imgui.h
+++ b/imgui.h
@@ -243,6 +243,7 @@ namespace ImGui
     IMGUI_API void          BulletTextV(const char* fmt, va_list args);
     IMGUI_API bool          Button(const char* label, const ImVec2& size = ImVec2(0,0), bool repeat_when_held = false);
     IMGUI_API bool          SmallButton(const char* label);
+    IMGUI_API bool          InvisibleButton(const char* str_id, const ImVec2& size);
     IMGUI_API void          Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), ImU32 tint_col = 0xFFFFFFFF, ImU32 border_col = 0x00000000);
     IMGUI_API bool          CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
     IMGUI_API bool          SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);     // adjust display_format to decorate the value with a prefix or a suffix. Use power!=1.0 for logarithmic sliders.