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Internals: Docking, Tab Bar: Add DockNodeBeginAmendTabBar() and work toward making hybrid dock node with windows tab bars somehow work (not done).

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docking
ocornut 4 years ago
parent bae2240eda
commit b26f1530b7
3 changed files with 56 additions and 22 deletions
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46
imgui.cpp
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@ -12510,6 +12510,8 @@ bool ImGui::DockContextCalcDropPosForDocking(ImGuiWindow* target, ImGuiDockNode*
// - DockNodeStartMouseMovingWindow()
// - DockNodeUpdate()
// - DockNodeUpdateWindowMenu()
// - DockNodeBeginAmendTabBar()
// - DockNodeEndAmendTabBar()
// - DockNodeUpdateTabBar()
// - DockNodeAddTabBar()
// - DockNodeRemoveTabBar()
@ -13231,7 +13233,8 @@ static ImGuiID ImGui::DockNodeUpdateWindowMenu(ImGuiDockNode* node, ImGuiTabBar*
for (int tab_n = 0; tab_n < tab_bar->Tabs.Size; tab_n++)
{
ImGuiTabItem* tab = &tab_bar->Tabs[tab_n];
IM_ASSERT(tab->Window != NULL);
if (tab->Window == NULL)
continue;
if (Selectable(tab->Window->Name, tab->ID == tab_bar->SelectedTabId))
ret_tab_id = tab->ID;
SameLine();
@ -13243,6 +13246,26 @@ static ImGuiID ImGui::DockNodeUpdateWindowMenu(ImGuiDockNode* node, ImGuiTabBar*
return ret_tab_id;
}
// User helper to append/amend into a dock node tab bar. Most commonly used to add e.g. a "+" button.
bool ImGui::DockNodeBeginAmendTabBar(ImGuiDockNode* node)
{
if (node->TabBar == NULL || node->HostWindow == NULL)
return false;
Begin(node->HostWindow->Name);
PushOverrideID(node->ID);
bool ret = BeginTabBarEx(node->TabBar, node->TabBar->BarRect, node->TabBar->Flags, node);
IM_ASSERT(ret);
return true;
}
void ImGui::DockNodeEndAmendTabBar()
{
EndTabBar();
PopID();
End();
}
// Submit the tab bar corresponding to a dock node and various housekeeping details.
static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_window)
{
ImGuiContext& g = *GImGui;
@ -13446,7 +13469,14 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
if (g.HoveredId == 0 || g.HoveredId == title_bar_id || g.ActiveId == title_bar_id)
{
bool held;
ButtonBehavior(title_bar_rect, title_bar_id, NULL, &held);
ButtonBehavior(title_bar_rect, title_bar_id, NULL, &held, ImGuiButtonFlags_AllowItemOverlap);
if (g.HoveredId == title_bar_id)
{
// ImGuiButtonFlags_AllowItemOverlap + SetItemAllowOverlap() required for appending into dock node tab bar,
// otherwise dragging window will steal HoveredId and amended tabs cannot get them.
host_window->DC.LastItemId = title_bar_id;
SetItemAllowOverlap();
}
if (held)
{
if (IsMouseClicked(0))
@ -15847,13 +15877,13 @@ void ImGui::ShowMetricsWindow(bool* p_open)
const char* buf_end = buf + IM_ARRAYSIZE(buf);
const bool is_active = (tab_bar->PrevFrameVisible >= ImGui::GetFrameCount() - 2);
p += ImFormatString(p, buf_end - p, "Tab Bar 0x%08X (%d tabs)%s", tab_bar->ID, tab_bar->Tabs.Size, is_active ? "" : " *Inactive*");
if (tab_bar->Flags & ImGuiTabBarFlags_DockNode)
p += ImFormatString(p, buf_end - p, " { ");
for (int tab_n = 0; tab_n < ImMin(tab_bar->Tabs.Size, 3); tab_n++)
{
p += ImFormatString(p, buf_end - p, " { ");
for (int tab_n = 0; tab_n < ImMin(tab_bar->Tabs.Size, 3); tab_n++)
p += ImFormatString(p, buf_end - p, "%s'%s'", tab_n > 0 ? ", " : "", tab_bar->Tabs[tab_n].Window->Name);
p += ImFormatString(p, buf_end - p, (tab_bar->Tabs.Size > 3) ? " ... }" : " } ");
ImGuiTabItem* tab = &tab_bar->Tabs[tab_n];
p += ImFormatString(p, buf_end - p, "%s'%s'", tab_n > 0 ? ", " : "", (tab->Window || tab->NameOffset != -1) ? tab_bar->GetTabName(tab) : "???");
}
p += ImFormatString(p, buf_end - p, (tab_bar->Tabs.Size > 3) ? " ... }" : " } ");
if (!is_active) { PushStyleColor(ImGuiCol_Text, GetStyleColorVec4(ImGuiCol_TextDisabled)); }
bool open = ImGui::TreeNode(tab_bar, "%s", buf);
if (!is_active) { PopStyleColor(); }
@ -15872,7 +15902,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
ImGui::PushID(tab);
if (ImGui::SmallButton("<")) { TabBarQueueReorder(tab_bar, tab, -1); } ImGui::SameLine(0, 2);
if (ImGui::SmallButton(">")) { TabBarQueueReorder(tab_bar, tab, +1); } ImGui::SameLine();
ImGui::Text("%02d%c Tab 0x%08X '%s' Offset: %.1f, Width: %.1f/%.1f", tab_n, (tab->ID == tab_bar->SelectedTabId) ? '*' : ' ', tab->ID, (tab->Window || tab->NameOffset != -1) ? tab_bar->GetTabName(tab) : "", tab->Offset, tab->Width, tab->ContentWidth);
ImGui::Text("%02d%c Tab 0x%08X '%s' Offset: %.1f, Width: %.1f/%.1f", tab_n, (tab->ID == tab_bar->SelectedTabId) ? '*' : ' ', tab->ID, (tab->Window || tab->NameOffset != -1) ? tab_bar->GetTabName(tab) : "???", tab->Offset, tab->Width, tab->ContentWidth);
ImGui::PopID();
}
ImGui::TreePop();

2
imgui_internal.h
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@ -2170,6 +2170,8 @@ namespace ImGui
IMGUI_API void DockContextQueueUndockWindow(ImGuiContext* ctx, ImGuiWindow* window);
IMGUI_API void DockContextQueueUndockNode(ImGuiContext* ctx, ImGuiDockNode* node);
IMGUI_API bool DockContextCalcDropPosForDocking(ImGuiWindow* target, ImGuiDockNode* target_node, ImGuiWindow* payload, ImGuiDir split_dir, bool split_outer, ImVec2* out_pos);
IMGUI_API bool DockNodeBeginAmendTabBar(ImGuiDockNode* node);
IMGUI_API void DockNodeEndAmendTabBar();
inline ImGuiDockNode* DockNodeGetRootNode(ImGuiDockNode* node) { while (node->ParentNode) node = node->ParentNode; return node; }
inline int DockNodeGetDepth(const ImGuiDockNode* node) { int depth = 0; while (node->ParentNode) { node = node->ParentNode; depth++; } return depth; }
inline ImGuiDockNode* GetWindowDockNode() { ImGuiContext& g = *GImGui; return g.CurrentWindow->DockNode; }

30
imgui_widgets.cpp
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@ -6824,7 +6824,7 @@ struct ImGuiTabBarSection
namespace ImGui
{
static void TabBarLayout(ImGuiTabBar* tab_bar);
static ImU32 TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label);
static ImU32 TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label, ImGuiWindow* docked_window);
static float TabBarCalcMaxTabWidth();
static float TabBarScrollClamp(ImGuiTabBar* tab_bar, float scrolling);
static void TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab, ImGuiTabBarSection* sections);
@ -6918,7 +6918,7 @@ bool ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG
// Ensure correct ordering when toggling ImGuiTabBarFlags_Reorderable flag, or when a new tab was added while being not reorderable
if ((flags & ImGuiTabBarFlags_Reorderable) != (tab_bar->Flags & ImGuiTabBarFlags_Reorderable) || (tab_bar->TabsAddedNew && !(flags & ImGuiTabBarFlags_Reorderable)))
if (tab_bar->Tabs.Size > 1 && (flags & ImGuiTabBarFlags_DockNode) == 0)
if (tab_bar->Tabs.Size > 1 && (flags & ImGuiTabBarFlags_DockNode) == 0) // FIXME: TabBar with DockNode can now be hybrid
ImQsort(tab_bar->Tabs.Data, tab_bar->Tabs.Size, sizeof(ImGuiTabItem), TabItemComparerByBeginOrder);
tab_bar->TabsAddedNew = false;
@ -7177,6 +7177,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
{
ImGuiTabItem* tab = &tab_bar->Tabs[section_tab_index + tab_n];
tab->Offset = tab_offset;
tab->NameOffset = -1;
tab_offset += tab->Width + (tab_n < section->TabCount - 1 ? g.Style.ItemInnerSpacing.x : 0.0f);
}
tab_bar->WidthAllTabs += ImMax(section->Width + section->Spacing, 0.0f);
@ -7184,6 +7185,9 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
section_tab_index += section->TabCount;
}
// Clear name buffers
tab_bar->TabsNames.Buf.resize(0);
// If we have lost the selected tab, select the next most recently active one
if (found_selected_tab_id == false)
tab_bar->SelectedTabId = 0;
@ -7220,21 +7224,18 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
tab_bar->ScrollingRectMinX = tab_bar->BarRect.Min.x + sections[0].Width + sections[0].Spacing;
tab_bar->ScrollingRectMaxX = tab_bar->BarRect.Max.x - sections[2].Width - sections[1].Spacing;
// Clear name buffers
if ((tab_bar->Flags & ImGuiTabBarFlags_DockNode) == 0)
tab_bar->TabsNames.Buf.resize(0);
// Actual layout in host window (we don't do it in BeginTabBar() so as not to waste an extra frame)
ImGuiWindow* window = g.CurrentWindow;
window->DC.CursorPos = tab_bar->BarRect.Min;
ItemSize(ImVec2(tab_bar->WidthAllTabsIdeal, tab_bar->BarRect.GetHeight()), tab_bar->FramePadding.y);
}
// Dockables uses Name/ID in the global namespace. Non-dockable items use the ID stack.
static ImU32 ImGui::TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label)
// Dockable uses Name/ID in the global namespace. Non-dockable items use the ID stack.
static ImU32 ImGui::TabBarCalcTabID(ImGuiTabBar* tab_bar, const char* label, ImGuiWindow* docked_window)
{
if (tab_bar->Flags & ImGuiTabBarFlags_DockNode)
if (docked_window != NULL)
{
IM_ASSERT(tab_bar->Flags & ImGuiTabBarFlags_DockNode);
ImGuiID id = ImHashStr(label);
KeepAliveID(id);
return id;
@ -7581,7 +7582,7 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
return false;
const ImGuiStyle& style = g.Style;
const ImGuiID id = TabBarCalcTabID(tab_bar, label);
const ImGuiID id = TabBarCalcTabID(tab_bar, label, docked_window);
// If the user called us with *p_open == false, we early out and don't render.
// We make a call to ItemAdd() so that attempts to use a contextual popup menu with an implicit ID won't use an older ID.
@ -7631,9 +7632,10 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
tab->Window = docked_window;
// Append name with zero-terminator
if (tab_bar->Flags & ImGuiTabBarFlags_DockNode)
// (regular tabs are permitted in a DockNode tab bar, but window tabs not permitted in a non-DockNode tab bar)
if (tab->Window != NULL)
{
IM_ASSERT(tab->Window != NULL);
IM_ASSERT(tab_bar->Flags & ImGuiTabBarFlags_DockNode);
tab->NameOffset = -1;
}
else
@ -7851,7 +7853,7 @@ void ImGui::SetTabItemClosed(const char* label)
if (is_within_manual_tab_bar)
{
ImGuiTabBar* tab_bar = g.CurrentTabBar;
ImGuiID tab_id = TabBarCalcTabID(tab_bar, label);
ImGuiID tab_id = TabBarCalcTabID(tab_bar, label, NULL);
if (ImGuiTabItem* tab = TabBarFindTabByID(tab_bar, tab_id))
tab->WantClose = true; // Will be processed by next call to TabBarLayout()
}
@ -7860,7 +7862,7 @@ void ImGui::SetTabItemClosed(const char* label)
if (window->DockIsActive)
if (ImGuiDockNode* node = window->DockNode)
{
ImGuiID tab_id = TabBarCalcTabID(node->TabBar, label);
ImGuiID tab_id = TabBarCalcTabID(node->TabBar, label, window);
TabBarRemoveTab(node->TabBar, tab_id);
window->DockTabWantClose = true;
}

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