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InputText: cursor/selection/undo stack persist when using other widgets and getting back to same (#134)

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Using SetKeyboardFocusHere() in particular on last used text edit revive
the cursor/selection.
This commit is contained in:
ocornut 2015-02-21 16:30:40 +00:00
parent 242a52abba
commit 0a1e67a787
1 changed files with 23 additions and 5 deletions
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28
imgui.cpp
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@ -928,6 +928,7 @@ struct ImGuiDrawContext
// Internal state of the currently focused/edited text input box // Internal state of the currently focused/edited text input box
struct ImGuiTextEditState struct ImGuiTextEditState
{ {
ImGuiID Id; // widget id owning the text state
ImWchar Text[1024]; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer. ImWchar Text[1024]; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
char InitialText[1024*3+1]; // backup of end-user buffer at the time of focus (in UTF-8, unconverted) char InitialText[1024*3+1]; // backup of end-user buffer at the time of focus (in UTF-8, unconverted)
size_t BufSize; // end-user buffer size, <= 1024 (or increase above) size_t BufSize; // end-user buffer size, <= 1024 (or increase above)
@ -5343,6 +5344,8 @@ bool ImGui::InputText(const char* label, char* buf, size_t buf_size, ImGuiInputT
const bool is_ctrl_down = io.KeyCtrl; const bool is_ctrl_down = io.KeyCtrl;
const bool is_shift_down = io.KeyShift; const bool is_shift_down = io.KeyShift;
const bool focus_requested = window->FocusItemRegister(g.ActiveId == id, (flags & ImGuiInputTextFlags_CallbackCompletion) == 0); // Using completion callback disable keyboard tabbing const bool focus_requested = window->FocusItemRegister(g.ActiveId == id, (flags & ImGuiInputTextFlags_CallbackCompletion) == 0); // Using completion callback disable keyboard tabbing
const bool focus_requested_by_code = focus_requested && (window->FocusIdxAllCounter == window->FocusIdxAllRequestCurrent);
const bool focus_requested_by_tab = focus_requested && !focus_requested_by_code;
const bool hovered = IsHovered(frame_bb, id); const bool hovered = IsHovered(frame_bb, id);
if (hovered) if (hovered)
@ -5357,14 +5360,28 @@ bool ImGui::InputText(const char* label, char* buf, size_t buf_size, ImGuiInputT
// Start edition // Start edition
// Take a copy of the initial buffer value (both in original UTF-8 format and converted to wchar) // Take a copy of the initial buffer value (both in original UTF-8 format and converted to wchar)
ImFormatString(edit_state.InitialText, IM_ARRAYSIZE(edit_state.InitialText), "%s", buf); ImFormatString(edit_state.InitialText, IM_ARRAYSIZE(edit_state.InitialText), "%s", buf);
ImTextStrFromUtf8(edit_state.Text, IM_ARRAYSIZE(edit_state.Text), buf, NULL); size_t buf_len = ImTextStrFromUtf8(edit_state.Text, IM_ARRAYSIZE(edit_state.Text), buf, NULL);
edit_state.ScrollX = 0.0f;
edit_state.Width = w; edit_state.Width = w;
stb_textedit_initialize_state(&edit_state.StbState, true);
edit_state.CursorAnimReset();
edit_state.InputCursorScreenPos = ImVec2(-1.f,-1.f); edit_state.InputCursorScreenPos = ImVec2(-1.f,-1.f);
edit_state.CursorAnimReset();
if (focus_requested || is_ctrl_down) if (edit_state.Id != id)
{
edit_state.Id = id;
edit_state.ScrollX = 0.0f;
stb_textedit_initialize_state(&edit_state.StbState, true);
if (focus_requested_by_code)
select_all = true;
}
else
{
// Recycle existing cursor/selection/undo stack but clamp position
// Note a single mouse click will override the cursor/position immediately by calling stb_textedit_click handler.
edit_state.StbState.cursor = ImMin(edit_state.StbState.cursor, buf_len);
edit_state.StbState.select_start = ImMin(edit_state.StbState.select_start, buf_len);
edit_state.StbState.select_end = ImMin(edit_state.StbState.select_end, buf_len);
}
if (focus_requested_by_tab || (user_clicked && is_ctrl_down))
select_all = true; select_all = true;
} }
SetActiveId(id); SetActiveId(id);
@ -8797,6 +8814,7 @@ void ImGui::ShowTestWindow(bool* opened)
ImGui::Text("Item with focus: %d", has_focus); ImGui::Text("Item with focus: %d", has_focus);
else else
ImGui::Text("Item with focus: <none>"); ImGui::Text("Item with focus: <none>");
ImGui::TextWrapped("Cursor & selection are preserved when refocusing last used item in code.");
ImGui::TreePop(); ImGui::TreePop();
} }
} }