66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
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// imgui_stdlib.cpp
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// Wrappers for C++ standard library (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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// Compatibility:
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// - std::string support is only guaranteed to work from C++11.
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// If you try to use it pre-C++11, please share your findings (w/ info about compiler/architecture)
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// Changelog:
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// - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
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#include "imgui.h"
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#include "imgui_stdlib.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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// If for some reason we refuse the new length (BufTextLen) and/or capacity (BufSize) we need to set them back to what we want.
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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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IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0);
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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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IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0);
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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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