Drezil/imgui
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Fixed vertical scrollbar flickering/appearing, typically when manually resizing and using a pattern of filling available height (e.g. full sized BeginChild). THIS IS A GREAT FIX, this glitch was nasty and annoying (and yet somehow nobody reported it?). Hopefully haven't broken anything else...

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This commit is contained in:
omar 2017-11-08 23:17:08 +01:00
parent a4cc3d4637
commit 2df8fa95df
1 changed files with 12 additions and 9 deletions
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21
imgui.cpp
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@ -4232,10 +4232,21 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// SIZE
// Save contents size from last frame for auto-fitting (unless explicitly specified)
// Update contents size from last frame for auto-fitting (unless explicitly specified)
window->SizeContents.x = (float)(int)((window->SizeContentsExplicit.x != 0.0f) ? window->SizeContentsExplicit.x : ((window_is_new ? 0.0f : window->DC.CursorMaxPos.x - window->Pos.x) + window->Scroll.x));
window->SizeContents.y = (float)(int)((window->SizeContentsExplicit.y != 0.0f) ? window->SizeContentsExplicit.y : ((window_is_new ? 0.0f : window->DC.CursorMaxPos.y - window->Pos.y) + window->Scroll.y));
// Update scrollbar status based on the Size that was effective during last frame (and not the upcoming Size which we are updating below), so that user code consuming exactly the available size won't trigger scrollbars when e.g. manually resizing.
if (!window->Collapsed)
{
window->ScrollbarY = (flags & ImGuiWindowFlags_AlwaysVerticalScrollbar) || ((window->SizeContents.y > window->Size.y + style.ItemSpacing.y) && !(flags & ImGuiWindowFlags_NoScrollbar));
window->ScrollbarX = (flags & ImGuiWindowFlags_AlwaysHorizontalScrollbar) || ((window->SizeContents.x > window->Size.x - (window->ScrollbarY ? style.ScrollbarSize : 0.0f) - window->WindowPadding.x) && !(flags & ImGuiWindowFlags_NoScrollbar) && (flags & ImGuiWindowFlags_HorizontalScrollbar));
if (window->ScrollbarX && !window->ScrollbarY)
window->ScrollbarY = (window->SizeContents.y > window->Size.y + style.ItemSpacing.y - style.ScrollbarSize) && !(flags & ImGuiWindowFlags_NoScrollbar);
window->ScrollbarSizes = ImVec2(window->ScrollbarY ? style.ScrollbarSize : 0.0f, window->ScrollbarX ? style.ScrollbarSize : 0.0f);
window->BorderSize = (flags & ImGuiWindowFlags_ShowBorders) ? 1.0f : 0.0f;
}
// Hide popup/tooltip window when first appearing while we measure size (because we recycle them)
if (window->HiddenFrames > 0)
window->HiddenFrames--;
@ -4416,14 +4427,6 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
title_bar_rect = window->TitleBarRect();
}
// Scrollbars
window->ScrollbarY = (flags & ImGuiWindowFlags_AlwaysVerticalScrollbar) || ((window->SizeContents.y > window->Size.y + style.ItemSpacing.y) && !(flags & ImGuiWindowFlags_NoScrollbar));
window->ScrollbarX = (flags & ImGuiWindowFlags_AlwaysHorizontalScrollbar) || ((window->SizeContents.x > window->Size.x - (window->ScrollbarY ? style.ScrollbarSize : 0.0f) - window->WindowPadding.x) && !(flags & ImGuiWindowFlags_NoScrollbar) && (flags & ImGuiWindowFlags_HorizontalScrollbar));
if (window->ScrollbarX && !window->ScrollbarY)
window->ScrollbarY = (window->SizeContents.y > window->Size.y + style.ItemSpacing.y - style.ScrollbarSize) && !(flags & ImGuiWindowFlags_NoScrollbar);
window->ScrollbarSizes = ImVec2(window->ScrollbarY ? style.ScrollbarSize : 0.0f, window->ScrollbarX ? style.ScrollbarSize : 0.0f);
window->BorderSize = (flags & ImGuiWindowFlags_ShowBorders) ? 1.0f : 0.0f;
// Window background, Default Alpha
ImU32 bg_col = GetColorU32(GetWindowBgColorIdxFromFlags(flags));
window->DrawList->AddRectFilled(window->Pos+ImVec2(0,window->TitleBarHeight()), window->Pos+window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? ImGuiCorner_All : ImGuiCorner_BotLeft|ImGuiCorner_BotRight);