75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2018 Jérémie Dumas <jeremie.dumas@ens-lyon.org>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_OPENGL_GLFW_IMGUI_IMGUIHELPERS_H
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#define IGL_OPENGL_GLFW_IMGUI_IMGUIHELPERS_H
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////////////////////////////////////////////////////////////////////////////////
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#include <imgui/imgui.h>
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#include <vector>
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#include <string>
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#include <algorithm>
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#include <functional>
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////////////////////////////////////////////////////////////////////////////////
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// Extend ImGui by populating its namespace directly
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//
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// Code snippets taken from there:
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// https://eliasdaler.github.io/using-imgui-with-sfml-pt2/
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namespace ImGui
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{
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static auto vector_getter = [](void* vec, int idx, const char** out_text)
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{
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auto& vector = *static_cast<std::vector<std::string>*>(vec);
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if (idx < 0 || idx >= static_cast<int>(vector.size())) { return false; }
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*out_text = vector.at(idx).c_str();
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return true;
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};
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inline bool Combo(const char* label, int* idx, std::vector<std::string>& values)
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{
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if (values.empty()) { return false; }
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return Combo(label, idx, vector_getter,
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static_cast<void*>(&values), values.size());
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}
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inline bool Combo(const char* label, int* idx, std::function<const char *(int)> getter, int items_count)
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{
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auto func = [](void* data, int i, const char** out_text) {
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auto &getter = *reinterpret_cast<std::function<const char *(int)> *>(data);
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const char *s = getter(i);
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if (s) { *out_text = s; return true; }
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else { return false; }
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};
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return Combo(label, idx, func, reinterpret_cast<void *>(&getter), items_count);
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}
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inline bool ListBox(const char* label, int* idx, std::vector<std::string>& values)
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{
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if (values.empty()) { return false; }
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return ListBox(label, idx, vector_getter,
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static_cast<void*>(&values), values.size());
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}
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inline bool InputText(const char* label, std::string &str, ImGuiInputTextFlags flags = 0, ImGuiTextEditCallback callback = NULL, void* user_data = NULL)
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{
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char buf[1024];
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std::fill_n(buf, 1024, 0);
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std::copy_n(str.begin(), std::min(1024, (int) str.size()), buf);
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if (ImGui::InputText(label, buf, 1024, flags, callback, user_data))
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{
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str = std::string(buf);
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return true;
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}
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return false;
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}
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} // namespace ImGui
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#endif // IGL_OPENGL_GLFW_IMGUI_IMGUIHELPERS_H
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