Added optional misc/stl/imgui_stl.h wrapper to use with STL types (e.g. InputText with std::string). (#2035, #2006, #1443, #1008)
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6 changed files with 82 additions and 6 deletions
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// imgui_stl.cpp
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// Wrappers for STL types (std::string, etc.)
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// This is also an example of how you may wrap your own similar types.
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#include "imgui.h" |
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#include "imgui_stl.h" |
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struct InputTextCallback_UserData |
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{ |
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std::string* Str; |
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ImGuiInputTextCallback ChainCallback; |
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void* ChainCallbackUserData; |
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}; |
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static int InputTextCallback(ImGuiInputTextCallbackData* data) |
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{ |
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InputTextCallback_UserData* user_data = (InputTextCallback_UserData*)data->UserData; |
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if (data->EventFlag == ImGuiInputTextFlags_CallbackResize) |
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{ |
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// Resize string callback
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std::string* str = user_data->Str; |
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IM_ASSERT(data->Buf == str->c_str()); |
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str->resize(data->BufTextLen); |
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data->Buf = (char*)str->c_str(); |
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} |
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else if (user_data->ChainCallback) |
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{ |
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// Forward to user callback, if any
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data->UserData = user_data->ChainCallbackUserData; |
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return user_data->ChainCallback(data); |
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} |
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return 0; |
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} |
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bool ImGui::InputText(const char* label, std::string* str, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data) |
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{ |
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flags |= ImGuiInputTextFlags_CallbackResize; |
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InputTextCallback_UserData cb_user_data; |
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cb_user_data.Str = str; |
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cb_user_data.ChainCallback = callback; |
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cb_user_data.ChainCallbackUserData = user_data; |
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return InputText(label, (char*)str->c_str(), str->capacity() + 1, flags, InputTextCallback, &cb_user_data); |
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} |
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bool ImGui::InputTextMultiline(const char* label, std::string* str, const ImVec2& size, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data) |
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{ |
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flags |= ImGuiInputTextFlags_CallbackResize; |
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InputTextCallback_UserData cb_user_data; |
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cb_user_data.Str = str; |
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cb_user_data.ChainCallback = callback; |
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cb_user_data.ChainCallbackUserData = user_data; |
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return InputTextMultiline(label, (char*)str->c_str(), str->capacity() + 1, size, flags, InputTextCallback, &cb_user_data); |
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} |
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// imgui_stl.h
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// Wrappers for STL types (std::string, etc.)
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// This is also an example of how you may wrap your own similar types.
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// Changelog:
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// - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
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#pragma once |
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#include <string> |
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namespace ImGui |
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{ |
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// ImGui::InputText() with std::string
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// Because text input needs dynamic resizing, we need to setup a callback to grow the capacity
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IMGUI_API bool InputText(const char* label, std::string* str, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL); |
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IMGUI_API bool InputTextMultiline(const char* label, std::string* str, const ImVec2& size = ImVec2(0, 0), ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL); |
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} |
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