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TypingSelect: Added first version of GetTypingSelectRequest() API.

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# Conflicts:
#	imgui_internal.h
#	imgui_widgets.cpp
This commit is contained in:
ocornut
2023-09-08 17:16:19 +02:00
parent 7812039402
commit 0962c9fb72
2 changed files with 139 additions and 0 deletions
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98
imgui_widgets.cpp
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@ -18,6 +18,7 @@ Index of this file:
// [SECTION] Widgets: ColorEdit, ColorPicker, ColorButton, etc.
// [SECTION] Widgets: TreeNode, CollapsingHeader, etc.
// [SECTION] Widgets: Selectable
// [SECTION] Widgets: Typing-Select support
// [SECTION] Widgets: ListBox
// [SECTION] Widgets: PlotLines, PlotHistogram
// [SECTION] Widgets: Value helpers
@ -6597,6 +6598,103 @@ bool ImGui::Selectable(const char* label, bool* p_selected, ImGuiSelectableFlags
return false;
}
//-------------------------------------------------------------------------
// [SECTION] Widgets: Typing-Select support
//-------------------------------------------------------------------------
// [Experimental] Currently not exposed in public API.
// Consume character inputs and return search request, if any.
// This would typically only be called on the focused window or location you want to grab inputs for, e.g.
// if (ImGui::IsWindowFocused(...))
// if (const ImGuiTypingSelectRequest* req = ImGui::GetTypingSelectRequest())
// if (req->SearchRequest)
// // perform search
// However the code is written in a way where calling it from multiple locations is safe (e.g. to obtain buffer).
const ImGuiTypingSelectRequest* ImGui::GetTypingSelectRequest(ImGuiTypingSelectFlags flags)
{
ImGuiContext& g = *GImGui;
ImGuiTypingSelectData* data = &g.TypingSelectData;
ImGuiTypingSelectRequest* out_request = &data->Request;
// Clear buffer
if (data->SearchBuffer[0] != 0)
{
const float TYPING_SELECT_RESET_TIMER = 1.70f; // FIXME: Potentially move to IO config.
bool clear_buffer = false;
clear_buffer |= (g.NavFocusScopeId != data->FocusScope);
clear_buffer |= (data->LastRequestTime + TYPING_SELECT_RESET_TIMER < g.Time);
clear_buffer |= g.NavAnyRequest;
clear_buffer |= g.ActiveId != 0 && g.NavActivateId == 0; // Allow temporary SPACE activation to not interfere
clear_buffer |= IsKeyPressed(ImGuiKey_Escape) || IsKeyPressed(ImGuiKey_Enter);
clear_buffer |= IsKeyPressed(ImGuiKey_Backspace) && (flags & ImGuiTypingSelectFlags_AllowBackspace) == 0;
//if (clear_buffer) { IMGUI_DEBUG_LOG("GetTypingSelectRequest(): Clear SearchBuffer.\n"); }
if (clear_buffer)
data->SearchBuffer[0] = 0;
}
// Append to buffer
const int buffer_max_len = IM_ARRAYSIZE(data->SearchBuffer) - 1;
int buffer_len = (int)strlen(data->SearchBuffer);
bool buffer_changed = false;
for (ImWchar w : g.IO.InputQueueCharacters)
{
if (w < 32 || (buffer_len == 0 && ImCharIsBlankW(w))) // Ignore leading blanks
continue;
int utf8_len = ImTextCountUtf8BytesFromStr(&w, &w + 1);
if (buffer_len + utf8_len > buffer_max_len)
break;
ImTextCharToUtf8(data->SearchBuffer + buffer_len, (unsigned int)w);
buffer_len += utf8_len;
buffer_changed = true;
}
g.IO.InputQueueCharacters.resize(0);
if ((flags & ImGuiTypingSelectFlags_AllowBackspace) && IsKeyPressed(ImGuiKey_Backspace, 0, ImGuiInputFlags_Repeat))
{
char* p = (char*)(void*)ImTextFindPreviousUtf8Codepoint(data->SearchBuffer, data->SearchBuffer + buffer_len);
*p = 0;
buffer_len = (int)(p - data->SearchBuffer);
}
if (buffer_len == 0)
return NULL;
// Return request if any
if (buffer_changed)
{
data->FocusScope = g.NavFocusScopeId;
data->LastRequestFrame = g.FrameCount;
data->LastRequestTime = (float)g.Time;
}
out_request->SearchBuffer = data->SearchBuffer;
out_request->SearchBufferLen = buffer_len;
out_request->SelectRequest = (data->LastRequestFrame == g.FrameCount);
out_request->RepeatCharMode = false;
out_request->RepeatCharSize = 0;
// Calculate if buffer contains the same character repeated.
// - This can be used to implement a special search mode on first character.
// - Performed on UTF-8 codepoint for correctness.
// - RepeatCharMode is always set for first input character, because it usually leads to a "next".
const char* buf_begin = out_request->SearchBuffer;
const char* buf_end = out_request->SearchBuffer + out_request->SearchBufferLen;
const int c0_len = ImTextCountUtf8BytesFromChar(buf_begin, buf_end);
const char* p = buf_begin + c0_len;
for (; p < buf_end; p += c0_len)
if (memcmp(buf_begin, p, (size_t)c0_len) != 0)
break;
out_request->RepeatCharMode = (p == buf_end);
out_request->RepeatCharSize = out_request->RepeatCharMode ? (ImS8)c0_len : 0;
return out_request;
}
//-------------------------------------------------------------------------
// [SECTION] Widgets: Multi-Select support
//-------------------------------------------------------------------------
//
//-------------------------------------------------------------------------
// [SECTION] Widgets: ListBox
//-------------------------------------------------------------------------