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Docking: Fix IsWindowAppearing() unnecessarily returning true twice in a row. (#4177, #3982, #1497, #1061) + added a zealous assert.

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ocornut 2021-06-03 16:46:01 +02:00
parent fa1f540e6c
commit f03ab2a5c5
1 changed files with 18 additions and 10 deletions
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28
imgui.cpp
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@ -6108,13 +6108,15 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window_just_activated_by_user |= (window->PopupId != popup_ref.PopupId); // We recycle popups so treat window as activated if popup id changed
window_just_activated_by_user |= (window != popup_ref.Window);
}
window->Appearing = window_just_activated_by_user;
if (window->Appearing)
SetWindowConditionAllowFlags(window, ImGuiCond_Appearing, true);
// Update Flags, LastFrameActive, BeginOrderXXX fields
const bool window_was_appearing = window->Appearing;
if (first_begin_of_the_frame)
{
window->Appearing = window_just_activated_by_user;
if (window->Appearing)
SetWindowConditionAllowFlags(window, ImGuiCond_Appearing, true);
window->FlagsPreviousFrame = window->Flags;
window->Flags = (ImGuiWindowFlags)flags;
window->LastFrameActive = current_frame;
@ -6147,18 +6149,18 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// Docking currently override constraints
g.NextWindowData.Flags &= ~ImGuiNextWindowDataFlags_HasSizeConstraint;
// Amend the Appearing flag
if (window->DockTabIsVisible && !dock_tab_was_visible && dock_node_was_visible && !window->Appearing && !window_was_appearing)
{
window->Appearing = true;
SetWindowConditionAllowFlags(window, ImGuiCond_Appearing, true);
}
}
else
{
window->DockIsActive = window->DockNodeIsVisible = window->DockTabIsVisible = false;
}
// Update the Appearing flag (again)
if (window->DockTabIsVisible && !dock_tab_was_visible && dock_node_was_visible && !window->Appearing)
{
window->Appearing = true;
SetWindowConditionAllowFlags(window, ImGuiCond_Appearing, true);
}
}
// Parent window is latched only on the first call to Begin() of the frame, so further append-calls can be done from a different window stack
@ -6940,6 +6942,12 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
if (window->AutoFitFramesX <= 0 && window->AutoFitFramesY <= 0 && window->HiddenFramesCannotSkipItems <= 0)
skip_items = true;
window->SkipItems = skip_items;
// Sanity check: there are two spots which can set Appearing = true
// - when 'window_just_activated_by_user' is set -> HiddenFramesCannotSkipItems is set -> SkipItems always false
// - in BeginDocked() path when DockNodeIsVisible == DockTabIsVisible == true -> hidden _should_ be all zero // FIXME: Not formally proven, hence the assert.
if (window->SkipItems && !window->Appearing)
IM_ASSERT(window->Appearing == false); // Please report on GitHub if this triggers: https://github.com/ocornut/imgui/issues/4177
}
return !window->SkipItems;