| // imgui_stdlib.cpp |
| // Wrappers for C++ standard library (STL) types (std::string, etc.) |
| // This is also an example of how you may wrap your own similar types. |
| |
| // Compatibility: |
| // - std::string support is only guaranteed to work from C++11. |
| // If you try to use it pre-C++11, please share your findings (w/ info about compiler/architecture) |
| |
| // Changelog: |
| // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string |
| |
| #include "imgui.h" |
| #include "imgui_stdlib.h" |
| |
| struct InputTextCallback_UserData |
| { |
| std::string* Str; |
| ImGuiInputTextCallback ChainCallback; |
| void* ChainCallbackUserData; |
| }; |
| |
| static int InputTextCallback(ImGuiInputTextCallbackData* data) |
| { |
| InputTextCallback_UserData* user_data = (InputTextCallback_UserData*)data->UserData; |
| if (data->EventFlag == ImGuiInputTextFlags_CallbackResize) |
| { |
| // Resize string callback |
| // If for some reason we refuse the new length (BufTextLen) and/or capacity (BufSize) we need to set them back to what we want. |
| std::string* str = user_data->Str; |
| IM_ASSERT(data->Buf == str->c_str()); |
| str->resize(data->BufTextLen); |
| data->Buf = (char*)str->c_str(); |
| } |
| else if (user_data->ChainCallback) |
| { |
| // Forward to user callback, if any |
| data->UserData = user_data->ChainCallbackUserData; |
| return user_data->ChainCallback(data); |
| } |
| return 0; |
| } |
| |
| bool ImGui::InputText(const char* label, std::string* str, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data) |
| { |
| IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0); |
| flags |= ImGuiInputTextFlags_CallbackResize; |
| |
| InputTextCallback_UserData cb_user_data; |
| cb_user_data.Str = str; |
| cb_user_data.ChainCallback = callback; |
| cb_user_data.ChainCallbackUserData = user_data; |
| return InputText(label, (char*)str->c_str(), str->capacity() + 1, flags, InputTextCallback, &cb_user_data); |
| } |
| |
| bool ImGui::InputTextMultiline(const char* label, std::string* str, const ImVec2& size, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data) |
| { |
| IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0); |
| flags |= ImGuiInputTextFlags_CallbackResize; |
| |
| InputTextCallback_UserData cb_user_data; |
| cb_user_data.Str = str; |
| cb_user_data.ChainCallback = callback; |
| cb_user_data.ChainCallbackUserData = user_data; |
| return InputTextMultiline(label, (char*)str->c_str(), str->capacity() + 1, size, flags, InputTextCallback, &cb_user_data); |
| } |