1 // dear imgui: wrappers for C++ standard library (STL) types (std::string, etc.)
2 // This is also an example of how you may wrap your own similar types.
3
4 // Compatibility:
5 // - std::string support is only guaranteed to work from C++11.
6 // If you try to use it pre-C++11, please share your findings (w/ info about compiler/architecture)
7
8 // Changelog:
9 // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
10
11 #include "imgui.h"
12 #include "imgui_stdlib.h"
13
14 struct InputTextCallback_UserData
15 {
16 std::string* Str;
17 ImGuiInputTextCallback ChainCallback;
18 void* ChainCallbackUserData;
19 };
20
InputTextCallback(ImGuiInputTextCallbackData * data)21 static int InputTextCallback(ImGuiInputTextCallbackData* data)
22 {
23 InputTextCallback_UserData* user_data = (InputTextCallback_UserData*)data->UserData;
24 if (data->EventFlag == ImGuiInputTextFlags_CallbackResize)
25 {
26 // Resize string callback
27 // If for some reason we refuse the new length (BufTextLen) and/or capacity (BufSize) we need to set them back to what we want.
28 std::string* str = user_data->Str;
29 IM_ASSERT(data->Buf == str->c_str());
30 str->resize(data->BufTextLen);
31 data->Buf = (char*)str->c_str();
32 }
33 else if (user_data->ChainCallback)
34 {
35 // Forward to user callback, if any
36 data->UserData = user_data->ChainCallbackUserData;
37 return user_data->ChainCallback(data);
38 }
39 return 0;
40 }
41
InputText(const char * label,std::string * str,ImGuiInputTextFlags flags,ImGuiInputTextCallback callback,void * user_data)42 bool ImGui::InputText(const char* label, std::string* str, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data)
43 {
44 IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0);
45 flags |= ImGuiInputTextFlags_CallbackResize;
46
47 InputTextCallback_UserData cb_user_data;
48 cb_user_data.Str = str;
49 cb_user_data.ChainCallback = callback;
50 cb_user_data.ChainCallbackUserData = user_data;
51 return InputText(label, (char*)str->c_str(), str->capacity() + 1, flags, InputTextCallback, &cb_user_data);
52 }
53
InputTextMultiline(const char * label,std::string * str,const ImVec2 & size,ImGuiInputTextFlags flags,ImGuiInputTextCallback callback,void * user_data)54 bool ImGui::InputTextMultiline(const char* label, std::string* str, const ImVec2& size, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data)
55 {
56 IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0);
57 flags |= ImGuiInputTextFlags_CallbackResize;
58
59 InputTextCallback_UserData cb_user_data;
60 cb_user_data.Str = str;
61 cb_user_data.ChainCallback = callback;
62 cb_user_data.ChainCallbackUserData = user_data;
63 return InputTextMultiline(label, (char*)str->c_str(), str->capacity() + 1, size, flags, InputTextCallback, &cb_user_data);
64 }
65
InputTextWithHint(const char * label,const char * hint,std::string * str,ImGuiInputTextFlags flags,ImGuiInputTextCallback callback,void * user_data)66 bool ImGui::InputTextWithHint(const char* label, const char* hint, std::string* str, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data)
67 {
68 IM_ASSERT((flags & ImGuiInputTextFlags_CallbackResize) == 0);
69 flags |= ImGuiInputTextFlags_CallbackResize;
70
71 InputTextCallback_UserData cb_user_data;
72 cb_user_data.Str = str;
73 cb_user_data.ChainCallback = callback;
74 cb_user_data.ChainCallbackUserData = user_data;
75 return InputTextWithHint(label, hint, (char*)str->c_str(), str->capacity() + 1, flags, InputTextCallback, &cb_user_data);
76 }
77