From f2f326024c480e38de6404d11b5d85272bf8d9df Mon Sep 17 00:00:00 2001 From: ocornut Date: Wed, 14 Oct 2020 18:34:33 +0200 Subject: [PATCH] Tab Bar: Made it possible to append to an existing tab bar by calling BeginTabBar()/EndTabBar() again. --- docs/CHANGELOG.txt | 1 + imgui_internal.h | 6 ++++-- imgui_widgets.cpp | 26 ++++++++++++++++++-------- 3 files changed, 23 insertions(+), 10 deletions(-) diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt index 164e35541..e91267d38 100644 --- a/docs/CHANGELOG.txt +++ b/docs/CHANGELOG.txt @@ -54,6 +54,7 @@ Breaking Changes: Other Changes: +- Tab Bar: Made it possible to append to an existing tab bar by calling BeginTabBar()/EndTabBar() again. - Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them. - Docs: Consistently renamed all occurences of "binding" and "back-end" to "backend" in comments and docs. diff --git a/imgui_internal.h b/imgui_internal.h index e74d2a801..013c81396 100644 --- a/imgui_internal.h +++ b/imgui_internal.h @@ -1754,7 +1754,8 @@ struct ImGuiTabBar int CurrFrameVisible; int PrevFrameVisible; ImRect BarRect; - float LastTabContentHeight; // Record the height of contents submitted below the tab bar + float CurrTabsContentsHeight; + float PrevTabsContentsHeight; // Record the height of contents submitted below the tab bar float WidthAllTabs; // Actual width of all tabs (locked during layout) float WidthAllTabsIdeal; // Ideal width if all tabs were visible and not clipped float ScrollingAnim; @@ -1770,8 +1771,9 @@ struct ImGuiTabBar bool WantLayout; bool VisibleTabWasSubmitted; bool TabsAddedNew; // Set to true when a new tab item or button has been added to the tab bar during last frame - short LastTabItemIdx; // Index of last BeginTabItem() tab for use by EndTabItem() + short LastTabItemIdx; // Index of last BeginTabItem() tab for use by EndTabItem() ImVec2 FramePadding; // style.FramePadding locked at the time of BeginTabBar() + ImVec2 TabsContentsMin; ImGuiTextBuffer TabsNames; // For non-docking tab bar we re-append names in a contiguous buffer. ImGuiTabBar(); diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp index 2ea773e27..5da42da58 100644 --- a/imgui_widgets.cpp +++ b/imgui_widgets.cpp @@ -6805,7 +6805,7 @@ ImGuiTabBar::ImGuiTabBar() ID = 0; SelectedTabId = NextSelectedTabId = VisibleTabId = 0; CurrFrameVisible = PrevFrameVisible = -1; - LastTabContentHeight = 0.0f; + CurrTabsContentsHeight = PrevTabsContentsHeight = 0.0f; WidthAllTabs = WidthAllTabsIdeal = 0.0f; ScrollingAnim = ScrollingTarget = ScrollingTargetDistToVisibility = ScrollingSpeed = 0.0f; ScrollingRectMinX = ScrollingRectMaxX = 0.0f; @@ -6877,10 +6877,10 @@ bool ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG g.CurrentTabBarStack.push_back(GetTabBarRefFromTabBar(tab_bar)); g.CurrentTabBar = tab_bar; + // Append with multiple BeginTabBar()/EndTabBar() pairs. if (tab_bar->CurrFrameVisible == g.FrameCount) { - //IMGUI_DEBUG_LOG("BeginTabBarEx already called this frame\n", g.FrameCount); - IM_ASSERT(0); + window->DC.CursorPos = tab_bar->TabsContentsMin; return true; } @@ -6899,12 +6899,15 @@ bool ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG tab_bar->WantLayout = true; // Layout will be done on the first call to ItemTab() tab_bar->PrevFrameVisible = tab_bar->CurrFrameVisible; tab_bar->CurrFrameVisible = g.FrameCount; + tab_bar->PrevTabsContentsHeight = tab_bar->CurrTabsContentsHeight; + tab_bar->CurrTabsContentsHeight = 0.0f; tab_bar->FramePadding = g.Style.FramePadding; tab_bar->TabsActiveCount = 0; // Set cursor pos in a way which only be used in the off-chance the user erroneously submits item before BeginTabItem(): items will overlap - window->DC.CursorPos.x = tab_bar->BarRect.Min.x; - window->DC.CursorPos.y = tab_bar->BarRect.Max.y + g.Style.ItemSpacing.y; + tab_bar->TabsContentsMin.x = tab_bar->BarRect.Min.x; + tab_bar->TabsContentsMin.y = tab_bar->BarRect.Max.y + g.Style.ItemSpacing.y; + window->DC.CursorPos = tab_bar->TabsContentsMin; // Draw separator const ImU32 col = GetColorU32((flags & ImGuiTabBarFlags_IsFocused) ? ImGuiCol_TabActive : ImGuiCol_TabUnfocusedActive); @@ -6930,15 +6933,22 @@ void ImGui::EndTabBar() IM_ASSERT_USER_ERROR(tab_bar != NULL, "Mismatched BeginTabBar()/EndTabBar()!"); return; } - if (tab_bar->WantLayout) // Fallback in case no TabItem have been submitted + + // Fallback in case no TabItem have been submitted + if (tab_bar->WantLayout) TabBarLayout(tab_bar); // Restore the last visible height if no tab is visible, this reduce vertical flicker/movement when a tabs gets removed without calling SetTabItemClosed(). const bool tab_bar_appearing = (tab_bar->PrevFrameVisible + 1 < g.FrameCount); if (tab_bar->VisibleTabWasSubmitted || tab_bar->VisibleTabId == 0 || tab_bar_appearing) - tab_bar->LastTabContentHeight = ImMax(window->DC.CursorPos.y - tab_bar->BarRect.Max.y, 0.0f); + { + tab_bar->CurrTabsContentsHeight = ImMax(window->DC.CursorPos.y - tab_bar->BarRect.Max.y, tab_bar->CurrTabsContentsHeight); + window->DC.CursorPos.y = tab_bar->BarRect.Max.y + tab_bar->CurrTabsContentsHeight; + } else - window->DC.CursorPos.y = tab_bar->BarRect.Max.y + tab_bar->LastTabContentHeight; + { + window->DC.CursorPos.y = tab_bar->BarRect.Max.y + tab_bar->PrevTabsContentsHeight; + } if ((tab_bar->Flags & ImGuiTabBarFlags_DockNode) == 0) PopID();