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Internals: TabBar: minor tweaks and renaming.

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This commit is contained in:
ocornut 2021-02-24 16:05:47 +01:00
parent 6f4b9c65ae
commit 3776ba565f
2 changed files with 20 additions and 17 deletions
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2
imgui_internal.h
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@ -1897,7 +1897,7 @@ struct ImGuiTabBar
ImGuiTabBarFlags Flags; ImGuiTabBarFlags Flags;
ImGuiID ID; // Zero for tab-bars used by docking ImGuiID ID; // Zero for tab-bars used by docking
ImGuiID SelectedTabId; // Selected tab/window ImGuiID SelectedTabId; // Selected tab/window
ImGuiID NextSelectedTabId; ImGuiID NextSelectedTabId; // Next selected tab/window. Will also trigger a scrolling animation
ImGuiID VisibleTabId; // Can occasionally be != SelectedTabId (e.g. when previewing contents for CTRL+TAB preview) ImGuiID VisibleTabId; // Can occasionally be != SelectedTabId (e.g. when previewing contents for CTRL+TAB preview)
int CurrFrameVisible; int CurrFrameVisible;
int PrevFrameVisible; int PrevFrameVisible;

35
imgui_widgets.cpp
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@ -6906,7 +6906,7 @@ namespace ImGui
static ImU32 TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label); static ImU32 TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label);
static float TabBarCalcMaxTabWidth(); static float TabBarCalcMaxTabWidth();
static float TabBarScrollClamp(ImGuiTabBar* tab_bar, float scrolling); static float TabBarScrollClamp(ImGuiTabBar* tab_bar, float scrolling);
static void TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab, ImGuiTabBarSection* sections); static void TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiID tab_id, ImGuiTabBarSection* sections);
static ImGuiTabItem* TabBarScrollingButtons(ImGuiTabBar* tab_bar); static ImGuiTabItem* TabBarScrollingButtons(ImGuiTabBar* tab_bar);
static ImGuiTabItem* TabBarTabListPopupButton(ImGuiTabBar* tab_bar); static ImGuiTabItem* TabBarTabListPopupButton(ImGuiTabBar* tab_bar);
} }
@ -7117,12 +7117,12 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
sections[1].Spacing = sections[1].TabCount > 0 && sections[2].TabCount > 0 ? g.Style.ItemInnerSpacing.x : 0.0f; sections[1].Spacing = sections[1].TabCount > 0 && sections[2].TabCount > 0 ? g.Style.ItemInnerSpacing.x : 0.0f;
// Setup next selected tab // Setup next selected tab
ImGuiID scroll_track_selected_tab_id = 0; ImGuiID scroll_to_tab_id = 0;
if (tab_bar->NextSelectedTabId) if (tab_bar->NextSelectedTabId)
{ {
tab_bar->SelectedTabId = tab_bar->NextSelectedTabId; tab_bar->SelectedTabId = tab_bar->NextSelectedTabId;
tab_bar->NextSelectedTabId = 0; tab_bar->NextSelectedTabId = 0;
scroll_track_selected_tab_id = tab_bar->SelectedTabId; scroll_to_tab_id = tab_bar->SelectedTabId;
} }
// Process order change request (we could probably process it when requested but it's just saner to do it in a single spot). // Process order change request (we could probably process it when requested but it's just saner to do it in a single spot).
@ -7130,7 +7130,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
{ {
if (TabBarProcessReorder(tab_bar)) if (TabBarProcessReorder(tab_bar))
if (tab_bar->ReorderRequestTabId == tab_bar->SelectedTabId) if (tab_bar->ReorderRequestTabId == tab_bar->SelectedTabId)
scroll_track_selected_tab_id = tab_bar->ReorderRequestTabId; scroll_to_tab_id = tab_bar->ReorderRequestTabId;
tab_bar->ReorderRequestTabId = 0; tab_bar->ReorderRequestTabId = 0;
} }
@ -7138,7 +7138,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
const bool tab_list_popup_button = (tab_bar->Flags & ImGuiTabBarFlags_TabListPopupButton) != 0; const bool tab_list_popup_button = (tab_bar->Flags & ImGuiTabBarFlags_TabListPopupButton) != 0;
if (tab_list_popup_button) if (tab_list_popup_button)
if (ImGuiTabItem* tab_to_select = TabBarTabListPopupButton(tab_bar)) // NB: Will alter BarRect.Min.x! if (ImGuiTabItem* tab_to_select = TabBarTabListPopupButton(tab_bar)) // NB: Will alter BarRect.Min.x!
scroll_track_selected_tab_id = tab_bar->SelectedTabId = tab_to_select->ID; scroll_to_tab_id = tab_bar->SelectedTabId = tab_to_select->ID;
// Leading/Trailing tabs will be shrink only if central one aren't visible anymore, so layout the shrink data as: leading, trailing, central // Leading/Trailing tabs will be shrink only if central one aren't visible anymore, so layout the shrink data as: leading, trailing, central
// (whereas our tabs are stored as: leading, central, trailing) // (whereas our tabs are stored as: leading, central, trailing)
@ -7158,8 +7158,8 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
most_recently_selected_tab = tab; most_recently_selected_tab = tab;
if (tab->ID == tab_bar->SelectedTabId) if (tab->ID == tab_bar->SelectedTabId)
found_selected_tab_id = true; found_selected_tab_id = true;
if (scroll_track_selected_tab_id == 0 && g.NavJustMovedToId == tab->ID) if (scroll_to_tab_id == 0 && g.NavJustMovedToId == tab->ID)
scroll_track_selected_tab_id = tab->ID; scroll_to_tab_id = tab->ID;
// Refresh tab width immediately, otherwise changes of style e.g. style.FramePadding.x would noticeably lag in the tab bar. // Refresh tab width immediately, otherwise changes of style e.g. style.FramePadding.x would noticeably lag in the tab bar.
// Additionally, when using TabBarAddTab() to manipulate tab bar order we occasionally insert new tabs that don't have a width yet, // Additionally, when using TabBarAddTab() to manipulate tab bar order we occasionally insert new tabs that don't have a width yet,
@ -7190,11 +7190,11 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
// Horizontal scrolling buttons // Horizontal scrolling buttons
// (note that TabBarScrollButtons() will alter BarRect.Max.x) // (note that TabBarScrollButtons() will alter BarRect.Max.x)
if ((tab_bar->WidthAllTabsIdeal > tab_bar->BarRect.GetWidth() && tab_bar->Tabs.Size > 1) && !(tab_bar->Flags & ImGuiTabBarFlags_NoTabListScrollingButtons) && (tab_bar->Flags & ImGuiTabBarFlags_FittingPolicyScroll)) if ((tab_bar->WidthAllTabsIdeal > tab_bar->BarRect.GetWidth() && tab_bar->Tabs.Size > 1) && !(tab_bar->Flags & ImGuiTabBarFlags_NoTabListScrollingButtons) && (tab_bar->Flags & ImGuiTabBarFlags_FittingPolicyScroll))
if (ImGuiTabItem* scroll_track_selected_tab = TabBarScrollingButtons(tab_bar)) if (ImGuiTabItem* scroll_and_select_tab = TabBarScrollingButtons(tab_bar))
{ {
scroll_track_selected_tab_id = scroll_track_selected_tab->ID; scroll_to_tab_id = scroll_and_select_tab->ID;
if (!(scroll_track_selected_tab->Flags & ImGuiTabItemFlags_Button)) if ((scroll_and_select_tab->Flags & ImGuiTabItemFlags_Button) == 0)
tab_bar->SelectedTabId = scroll_track_selected_tab_id; tab_bar->SelectedTabId = scroll_to_tab_id;
} }
// Shrink widths if full tabs don't fit in their allocated space // Shrink widths if full tabs don't fit in their allocated space
@ -7254,16 +7254,15 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
if (found_selected_tab_id == false) if (found_selected_tab_id == false)
tab_bar->SelectedTabId = 0; tab_bar->SelectedTabId = 0;
if (tab_bar->SelectedTabId == 0 && tab_bar->NextSelectedTabId == 0 && most_recently_selected_tab != NULL) if (tab_bar->SelectedTabId == 0 && tab_bar->NextSelectedTabId == 0 && most_recently_selected_tab != NULL)
scroll_track_selected_tab_id = tab_bar->SelectedTabId = most_recently_selected_tab->ID; scroll_to_tab_id = tab_bar->SelectedTabId = most_recently_selected_tab->ID;
// Lock in visible tab // Lock in visible tab
tab_bar->VisibleTabId = tab_bar->SelectedTabId; tab_bar->VisibleTabId = tab_bar->SelectedTabId;
tab_bar->VisibleTabWasSubmitted = false; tab_bar->VisibleTabWasSubmitted = false;
// Update scrolling // Update scrolling
if (scroll_track_selected_tab_id) if (scroll_to_tab_id != 0)
if (ImGuiTabItem* scroll_track_selected_tab = TabBarFindTabByID(tab_bar, scroll_track_selected_tab_id)) TabBarScrollToTab(tab_bar, scroll_to_tab_id, sections);
TabBarScrollToTab(tab_bar, scroll_track_selected_tab, sections);
tab_bar->ScrollingAnim = TabBarScrollClamp(tab_bar, tab_bar->ScrollingAnim); tab_bar->ScrollingAnim = TabBarScrollClamp(tab_bar, tab_bar->ScrollingAnim);
tab_bar->ScrollingTarget = TabBarScrollClamp(tab_bar, tab_bar->ScrollingTarget); tab_bar->ScrollingTarget = TabBarScrollClamp(tab_bar, tab_bar->ScrollingTarget);
if (tab_bar->ScrollingAnim != tab_bar->ScrollingTarget) if (tab_bar->ScrollingAnim != tab_bar->ScrollingTarget)
@ -7363,8 +7362,12 @@ static float ImGui::TabBarScrollClamp(ImGuiTabBar* tab_bar, float scrolling)
return ImMax(scrolling, 0.0f); return ImMax(scrolling, 0.0f);
} }
static void ImGui::TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab, ImGuiTabBarSection* sections) // Note: we may scroll to tab that are not selected! e.g. using keyboard arrow keys
static void ImGui::TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiID tab_id, ImGuiTabBarSection* sections)
{ {
ImGuiTabItem* tab = TabBarFindTabByID(tab_bar, tab_id);
if (tab == NULL)
return;
if (tab->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing)) if (tab->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing))
return; return;