Function DragLineY

imgui/implot.cpp:3878–3928

}

bool DragLineY(int n_id, double* value, const ImVec4& col, float thickness, ImPlotDragToolFlags flags) {
    ImGui::PushID("#IMPLOT_DRAG_LINE_Y");
    ImPlotContext& gp = *GImPlot;
    IM_ASSERT_USER_ERROR(gp.CurrentPlot != NULL, "DragLineY() needs to be called between BeginPlot() and EndPlot()!");
    SetupLock();

    if (!ImHasFlag(flags,ImPlotDragToolFlags_NoFit) && FitThisFrame()) {
        FitPointY(*value);
    }

    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, thickness/2);
    float xl = gp.CurrentPlot->PlotRect.Min.x;
    float xr = gp.CurrentPlot->PlotRect.Max.x;
    float y  = IM_ROUND(PlotToPixels(0, *value,IMPLOT_AUTO,IMPLOT_AUTO).y);

    const ImGuiID id = ImGui::GetCurrentWindow()->GetID(n_id);
    ImRect rect(xl,y-grab_half_size,xr,y+grab_half_size);
    bool hovered = false, held = false;

    ImGui::KeepAliveID(id);
    if (input)
        ImGui::ButtonBehavior(rect,id,&hovered,&held);

    if ((hovered || held) && show_curs)
        ImGui::SetMouseCursor(ImGuiMouseCursor_ResizeNS);

    float len = gp.Style.MajorTickLen.y;
    ImVec4 color = IsColorAuto(col) ? ImGui::GetStyleColorVec4(ImGuiCol_Text) : col;
    ImU32 col32 = ImGui::ColorConvertFloat4ToU32(color);

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

    PushPlotClipRect();
    ImDrawList& DrawList = *GetPlotDrawList();
    if (dragging && no_delay)
        y  = IM_ROUND(PlotToPixels(0, *value,IMPLOT_AUTO,IMPLOT_AUTO).y);
    DrawList.AddLine(ImVec2(xl,y), ImVec2(xr,y),     col32,   thickness);
    DrawList.AddLine(ImVec2(xl,y), ImVec2(xl+len,y), col32, 3*thickness);
    DrawList.AddLine(ImVec2(xr,y), ImVec2(xr-len,y), col32, 3*thickness);
    PopPlotClipRect();

    ImGui::PopID();
    return dragging;
}

bool DragRect(int n_id, double* x_min, double* y_min, double* x_max, double* y_max, const ImVec4& col, ImPlotDragToolFlags flags) {
    ImGui::PushID("#IMPLOT_DRAG_RECT");