From 48f1df2fd63ea7ec600a75d7ee224f887b847de4 Mon Sep 17 00:00:00 2001
From: Bruno Herbelin <bruno.herbelin@gmail.com>
Date: Sun, 29 Jan 2023 10:54:57 +0100
Subject: [PATCH] ImGuiToolkit to render a Disabled Button

---
 src/ImGuiToolkit.cpp | 27 +++++++++++++++++++++++++++
 src/ImGuiToolkit.h   |  1 +
 2 files changed, 28 insertions(+)

diff --git a/src/ImGuiToolkit.cpp b/src/ImGuiToolkit.cpp
index dedb542..77318ee 100644
--- a/src/ImGuiToolkit.cpp
+++ b/src/ImGuiToolkit.cpp
@@ -72,6 +72,33 @@ bool ImGuiToolkit::ButtonToggle( const char* label, bool* toggle, const char *to
     return action;
 }
 
+void ImGuiToolkit::ButtonDisabled(const char* label, const ImVec2 &size_arg)
+{
+    ImGuiWindow* window = ImGui::GetCurrentWindow();
+    if (window->SkipItems)
+        return;
+
+    ImGuiContext& g = *GImGui;
+    const ImGuiStyle& style = g.Style;
+    const ImGuiID id = window->GetID(label);
+    const ImVec2 label_size = ImGui::CalcTextSize(label, NULL, true);
+
+    ImVec2 pos = window->DC.CursorPos;
+    ImVec2 size = ImGui::CalcItemSize(size_arg, label_size.x + style.FramePadding.x * 2.0f, label_size.y + style.FramePadding.y * 2.0f);
+
+    const ImRect bb(pos, pos + size);
+    ImGui::ItemSize(size, style.FramePadding.y);
+    if (!ImGui::ItemAdd(bb, id))
+        return;
+
+    // Render
+    const ImU32 col = ImGui::GetColorU32(ImGuiCol_FrameBg);
+    ImGui::RenderFrame(bb.Min, bb.Max, col, true, style.FrameRounding);
+
+    ImGui::PushStyleColor(ImGuiCol_Text, ImGui::GetColorU32(ImGuiCol_TextDisabled));
+    ImGui::RenderTextClipped(bb.Min + style.FramePadding, bb.Max - style.FramePadding, label, NULL, &label_size, style.ButtonTextAlign, &bb);
+    ImGui::PopStyleColor(1);
+}
 
 bool ImGuiToolkit::ButtonSwitch(const char* label, bool* toggle, const char* shortcut)
 {
diff --git a/src/ImGuiToolkit.h b/src/ImGuiToolkit.h
index a840921..93f4546 100644
--- a/src/ImGuiToolkit.h
+++ b/src/ImGuiToolkit.h
@@ -35,6 +35,7 @@ namespace ImGuiToolkit
     bool ButtonToggle  (const char* label, bool* toggle, const char *tooltip = nullptr);
     bool ButtonSwitch  (const char* label, bool* toggle, const char *shortcut = nullptr);
     void ButtonOpenUrl (const char* label, const char* url, const ImVec2& size_arg = ImVec2(0,0));
+    void ButtonDisabled(const char* label, const ImVec2& size_arg = ImVec2(0,0));
 
     // tooltip and mouse over help
     void setToolTipsEnabled (bool on);