Function CalcWindowAutoFitSize

Dependencies/ImGui/src/imgui.cpp:7045–7089

}

static ImVec2 CalcWindowAutoFitSize(ImGuiWindow* window, const ImVec2& size_contents, int axis_mask)
{
    ImGuiContext& g = *GImGui;
    ImGuiStyle& style = g.Style;
    const float decoration_w_without_scrollbars = window->DecoOuterSizeX1 + window->DecoOuterSizeX2 - window->ScrollbarSizes.x;
    const float decoration_h_without_scrollbars = window->DecoOuterSizeY1 + window->DecoOuterSizeY2 - window->ScrollbarSizes.y;
    ImVec2 size_pad = window->WindowPadding * 2.0f;
    ImVec2 size_desired;
    size_desired[ImGuiAxis_X] = (axis_mask & 1) ? size_contents.x + size_pad.x + decoration_w_without_scrollbars : window->Size.x;
    size_desired[ImGuiAxis_Y] = (axis_mask & 2) ? size_contents.y + size_pad.y + decoration_h_without_scrollbars : window->Size.y;

    // Determine maximum window size
    // Child windows are laid within their parent (unless they are also popups/menus) and thus have no restriction
    ImVec2 size_max = ImVec2(FLT_MAX, FLT_MAX);
    if ((window->Flags & ImGuiWindowFlags_ChildWindow) == 0 || (window->Flags & ImGuiWindowFlags_Popup) != 0)
    {
        if (!window->ViewportOwned)
            size_max = ImGui::GetMainViewport()->WorkSize - style.DisplaySafeAreaPadding * 2.0f;
        const int monitor_idx = window->ViewportAllowPlatformMonitorExtend;
        if (monitor_idx >= 0 && monitor_idx < g.PlatformIO.Monitors.Size)
            size_max = g.PlatformIO.Monitors[monitor_idx].WorkSize - style.DisplaySafeAreaPadding * 2.0f;
    }

    if (window->Flags & ImGuiWindowFlags_Tooltip)
    {
        // Tooltip always resize (up to maximum size)
        return ImMin(size_desired, size_max);
    }
    else
    {
        ImVec2 size_min = CalcWindowMinSize(window);
        ImVec2 size_auto_fit = ImClamp(size_desired, ImMin(size_min, size_max), size_max);

        // When the window cannot fit all contents (either because of constraints, either because screen is too small),
        // we are growing the size on the other axis to compensate for expected scrollbar. FIXME: Might turn bigger than ViewportSize-WindowPadding.
        ImVec2 size_auto_fit_after_constraint = CalcWindowSizeAfterConstraint(window, size_auto_fit);
        bool will_have_scrollbar_x = (size_auto_fit_after_constraint.x - size_pad.x - decoration_w_without_scrollbars < size_contents.x && !(window->Flags & ImGuiWindowFlags_NoScrollbar) && (window->Flags & ImGuiWindowFlags_HorizontalScrollbar)) || (window->Flags & ImGuiWindowFlags_AlwaysHorizontalScrollbar);
        bool will_have_scrollbar_y = (size_auto_fit_after_constraint.y - size_pad.y - decoration_h_without_scrollbars < size_contents.y && !(window->Flags & ImGuiWindowFlags_NoScrollbar)) || (window->Flags & ImGuiWindowFlags_AlwaysVerticalScrollbar);
        if (will_have_scrollbar_x)
            size_auto_fit.y += style.ScrollbarSize;
        if (will_have_scrollbar_y)
            size_auto_fit.x += style.ScrollbarSize;
        return size_auto_fit;
    }
}

ImVec2 ImGui::CalcWindowNextAutoFitSize(ImGuiWindow* window)
{