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Windows: reorganize auto-fitting code blocks in Begin(), aimed to have no side-effect, but..

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..outer ImGuiWindowFlags_AlwaysAutoResize previously took priority for both axis. New logic per-axis.
Toward #9060
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ocornut
2025-11-11 20:01:07 +01:00
parent fc262355ca
commit 52e9d94f93
1 changed files with 15 additions and 15 deletions
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30
imgui.cpp
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@@ -7578,32 +7578,32 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->ScrollbarSizes = ImVec2(0.0f, 0.0f);
// Calculate auto-fit size, handle automatic resize
// - Using SetNextWindowSize() overrides ImGuiWindowFlags_AlwaysAutoResize, so it can be used on tooltips/popups, etc.
// - We still process initial auto-fit on collapsed windows to get a window width, but otherwise don't honor ImGuiWindowFlags_AlwaysAutoResize when collapsed.
// - Auto-fit may only grow window during the first few frames.
const ImVec2 size_auto_fit = CalcWindowAutoFitSize(window, window->ContentSizeIdeal, ~0);
const ImVec2 old_size = window->SizeFull;
if ((flags & ImGuiWindowFlags_AlwaysAutoResize) && !window->Collapsed)
if (!window_size_x_set_by_api)
{
// Using SetNextWindowSize() overrides ImGuiWindowFlags_AlwaysAutoResize, so it can be used on tooltips/popups, etc.
if (!window_size_x_set_by_api)
if ((flags & ImGuiWindowFlags_AlwaysAutoResize) && !window->Collapsed)
{
window->SizeFull.x = size_auto_fit.x;
use_current_size_for_scrollbar_x = true;
}
if (!window_size_y_set_by_api)
{
window->SizeFull.y = size_auto_fit.y;
use_current_size_for_scrollbar_y = true;
}
}
else if (window->AutoFitFramesX > 0 || window->AutoFitFramesY > 0)
{
// Auto-fit may only grow window during the first few frames
// We still process initial auto-fit on collapsed windows to get a window width, but otherwise don't honor ImGuiWindowFlags_AlwaysAutoResize when collapsed.
if (!window_size_x_set_by_api && window->AutoFitFramesX > 0)
else if (window->AutoFitFramesX > 0)
{
window->SizeFull.x = window->AutoFitOnlyGrows ? ImMax(window->SizeFull.x, size_auto_fit.x) : size_auto_fit.x;
use_current_size_for_scrollbar_x = true;
}
if (!window_size_y_set_by_api && window->AutoFitFramesY > 0)
}
if (!window_size_y_set_by_api)
{
if ((flags & ImGuiWindowFlags_AlwaysAutoResize) && !window->Collapsed)
{
window->SizeFull.y = size_auto_fit.y;
use_current_size_for_scrollbar_y = true;
}
else if (window->AutoFitFramesY > 0)
{
window->SizeFull.y = window->AutoFitOnlyGrows ? ImMax(window->SizeFull.y, size_auto_fit.y) : size_auto_fit.y;
use_current_size_for_scrollbar_y = true;