Function DragPoint

Source/3rdParty/implot/implot.cpp:3966–4013

constexpr float DRAG_GRAB_HALF_SIZE = 4.0f;

bool DragPoint(int n_id, double* x, double* y, const ImVec4& col, float radius, ImPlotDragToolFlags flags, bool* out_clicked, bool* out_hovered, bool* out_held) {
    ImGui::PushID("#IMPLOT_DRAG_POINT");
    IM_ASSERT_USER_ERROR(GImPlot->CurrentPlot != nullptr, "DragPoint() needs to be called between BeginPlot() and EndPlot()!");
    SetupLock();

    if (!ImHasFlag(flags,ImPlotDragToolFlags_NoFit) && FitThisFrame()) {
        FitPoint(ImPlotPoint(*x,*y));
    }

    const bool input = !ImHasFlag(flags, ImPlotDragToolFlags_NoInputs);
    const bool show_curs = !ImHasFlag(flags, ImPlotDragToolFlags_NoCursors);
    const bool no_delay = !ImHasFlag(flags, ImPlotDragToolFlags_Delayed);
    const float grab_half_size = ImMax(DRAG_GRAB_HALF_SIZE, radius);
    const ImVec4 color = IsColorAuto(col) ? ImGui::GetStyleColorVec4(ImGuiCol_Text) : col;
    const ImU32 col32 = ImGui::ColorConvertFloat4ToU32(color);

    ImVec2 pos = PlotToPixels(*x,*y,IMPLOT_AUTO,IMPLOT_AUTO);
    const ImGuiID id = ImGui::GetCurrentWindow()->GetID(n_id);
    ImRect rect(pos.x-grab_half_size,pos.y-grab_half_size,pos.x+grab_half_size,pos.y+grab_half_size);
    bool hovered = false, held = false;

    ImGui::KeepAliveID(id);
    if (input) {
        bool clicked = ImGui::ButtonBehavior(rect,id,&hovered,&held);
        if (out_clicked) *out_clicked = clicked;
        if (out_hovered) *out_hovered = hovered;
        if (out_held)    *out_held    = held;
    }

    bool modified = false;
    if (held && ImGui::IsMouseDragging(0)) {
        *x = ImPlot::GetPlotMousePos(IMPLOT_AUTO,IMPLOT_AUTO).x;
        *y = ImPlot::GetPlotMousePos(IMPLOT_AUTO,IMPLOT_AUTO).y;
        modified = true;
    }

    PushPlotClipRect();
    ImDrawList& DrawList = *GetPlotDrawList();
    if ((hovered || held) && show_curs)
        ImGui::SetMouseCursor(ImGuiMouseCursor_Hand);
    if (modified && no_delay)
        pos = PlotToPixels(*x,*y,IMPLOT_AUTO,IMPLOT_AUTO);
    DrawList.AddCircleFilled(pos, radius, col32);
    PopPlotClipRect();

    ImGui::PopID();
    return modified;
}

bool DragLineX(int n_id, double* value, const ImVec4& col, float thickness, ImPlotDragToolFlags flags, bool* out_clicked, bool* out_hovered, bool* out_held) {
    // ImGui::PushID("#IMPLOT_DRAG_LINE_X");