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Docking: Added context menu option to hide the tab bar of single-window dock nodes, similar to Unreal. (#2109)

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This commit is contained in:
omar 2018-11-26 17:25:06 +01:00
parent 1e7b50aeae
commit d23c69d319
4 changed files with 107 additions and 40 deletions
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4
docs/TODO.txt
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@ -127,7 +127,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
- dock: B: when docking outer, perform size locking on neighbors nodes the same way we do it with splitters, so other nodes are not resized.
- dock: B~ central node resizing behavior incorrect.
- dock: B~ central node ID retrieval API?
- dock: B- full rebuild (which is a debug option) loses viewport of floating dock nodes.
- dock: B: changing title font/style per-window is not supported as dock nodes are created in NewFrame.
- dock: B- dock node inside its own viewports creates 1 temporary viewport per window on startup before ditching them (doesn't affect the user nor request platform windows to be created, but unnecessary)
- dock: B- resize sibling locking behavior may be less desirable if we merged same-axis sibling in a same node level?
- dock: B- single visible node part of a hidden split hierarchy (OnlyNodeWithWindows != NULL) should show a normal title bar (not a tab bar)
@ -143,7 +143,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
- dock: B- tab bar: make selected tab always shows its full title?
- dock: B- tab bar: the order/focus restoring code could be part of TabBar and not DockNode? (#8)
- dock: B- nav: design interactions so nav controls can dock/undock
- dock: B- dockspace: flag to lock the dock tree and/or sizes
- dock: B- dockspace: flag to lock the dock tree and/or sizes (ImGuiDockFlags_Locked?)
- dock: B- reintroduce collapsing a floating dock node. also collapsing a docked dock node!
- dock: B- allow dragging a non-floating dock node by clicking on the title-bar-looking section (not just the collapse/menu button)
- dock: B- option to remember undocked window size? (instead of keeping their docked size) (relate to #2104)

89
imgui.cpp
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@ -5396,6 +5396,20 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->DrawList->AddLine(menu_bar_rect.GetBL(), menu_bar_rect.GetBR(), GetColorU32(ImGuiCol_Border), style.FrameBorderSize);
}
// Docking: Unhide tab bar
if (window->DockNode && window->DockNode->IsHiddenTabBar)
{
float unhide_sz_draw = ImFloor(g.FontSize * 0.65f);
float unhide_sz_hit = ImFloor(g.FontSize * 0.55f);
ImVec2 p = window->DockNode->Pos;
ImRect r(p, p + ImVec2(unhide_sz_hit, unhide_sz_hit));
bool hovered, held;
if (ButtonBehavior(r, window->GetID("#UNHIDE"), &hovered, &held, ImGuiButtonFlags_FlattenChildren))
window->DockNode->WantHiddenTabBarToggle = true;
const ImU32 col = GetColorU32((held && hovered) ? ImGuiCol_ButtonActive : hovered ? ImGuiCol_ButtonHovered : ImGuiCol_Button);
window->DrawList->AddTriangleFilled(p, p + ImVec2(unhide_sz_draw, 0.0f), p + ImVec2(0.0f, unhide_sz_draw), col);
}
// Scrollbars
if (window->ScrollbarX)
Scrollbar(ImGuiLayoutType_Horizontal);
@ -9719,10 +9733,11 @@ struct ImGuiDockNodeSettings
char Depth;
char IsDockSpace;
char IsCentralNode;
char IsHiddenTabBar;
ImVec2ih Pos;
ImVec2ih Size;
ImVec2ih SizeRef;
ImGuiDockNodeSettings() { ID = ParentID = SelectedTabID = 0; SplitAxis = ImGuiAxis_None; Depth = 0; IsDockSpace = IsCentralNode = 0; }
ImGuiDockNodeSettings() { ID = ParentID = SelectedTabID = 0; SplitAxis = ImGuiAxis_None; Depth = 0; IsDockSpace = IsCentralNode = IsHiddenTabBar = 0; }
};
struct ImGuiDockContext
@ -10067,6 +10082,7 @@ static void ImGui::DockContextBuildNodesFromSettings(ImGuiContext* ctx, ImGuiDoc
node->SplitAxis = node_settings->SplitAxis;
node->IsDockSpace = node_settings->IsDockSpace != 0;
node->IsCentralNode = node_settings->IsCentralNode != 0;
node->IsHiddenTabBar = node_settings->IsHiddenTabBar != 0;
// Bind host window immediately if it already exist (in case of a rebuild)
// This is useful as the RootWindowForTitleBarHighlight links necessary to highlight the currently focused node requires node->HostWindow to be set.
@ -10194,10 +10210,12 @@ void ImGui::DockContextProcessDock(ImGuiContext* ctx, ImGuiDockRequest* req)
if (target_node)
{
inheritor_node->IsCentralNode = target_node->IsCentralNode;
inheritor_node->IsHiddenTabBar = target_node->IsHiddenTabBar;
target_node->IsCentralNode = false;
}
target_node = new_node;
}
target_node->IsHiddenTabBar = false;
if (target_node != payload_node)
{
@ -10318,7 +10336,8 @@ ImGuiDockNode::ImGuiDockNode(ImGuiID id)
WantCloseTabID = 0;
InitFromFirstWindowPosSize = InitFromFirstWindowViewport = false;
IsVisible = true;
IsDockSpace = IsCentralNode = HasCloseButton = HasCollapseButton = WantCloseAll = WantLockSizeOnce = WantMouseMove = false;
IsDockSpace = IsCentralNode = IsHiddenTabBar = HasCloseButton = HasCollapseButton = false;
WantCloseAll = WantLockSizeOnce = WantMouseMove = WantHiddenTabBarToggle = false;
}
ImGuiDockNode::~ImGuiDockNode()
@ -10597,6 +10616,13 @@ static void ImGui::DockNodeUpdateVisibleFlagAndInactiveChilds(ImGuiDockNode* nod
window_n--;
}
// Apply toggles at a single point of the frame (here!)
if (node->Windows.Size > 1)
node->IsHiddenTabBar = false;
else if (node->WantHiddenTabBarToggle)
node->IsHiddenTabBar ^= 1;
node->WantHiddenTabBarToggle = false;
DockNodeUpdateVisibleFlag(node);
}
@ -10876,6 +10902,30 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
node->WantCloseAll = false;
node->WantCloseTabID = 0;
// Decide if we should use a focused title bar color
bool is_focused = false;
ImGuiDockNode* root_node = DockNodeGetRootNode(node);
if (g.NavWindowingTarget)
is_focused = (g.NavWindowingTarget->DockNode == node);
else if (g.NavWindow && g.NavWindow->RootWindowForTitleBarHighlight == host_window->RootWindow && root_node->LastFocusedNodeID == node->ID)
is_focused = true;
// Hidden tab bar will show a triangle on the upper-left (in Begin)
if (node->IsHiddenTabBar)
{
node->VisibleWindow = (node->Windows.Size > 0) ? node->Windows[0] : NULL;
// Notify root of visible window (used to display title in OS task bar)
if (node->VisibleWindow)
{
if (is_focused || root_node->VisibleWindow == NULL)
root_node->VisibleWindow = node->VisibleWindow;
if (node->TabBar)
node->TabBar->VisibleTabId = node->VisibleWindow->ID;
}
return;
}
// Move ourselves to the Menu layer (so we can be accessed by tapping Alt) + undo SkipItems flag in order to draw over the title bar even if the window is collapsed
bool backup_skip_item = host_window->SkipItems;
if (!node->IsDockSpace)
@ -10891,14 +10941,6 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
if (tab_bar == NULL)
tab_bar = node->TabBar = IM_NEW(ImGuiTabBar)();
// Decide if we should use a focused title bar color
bool is_focused = false;
ImGuiDockNode* root_node = DockNodeGetRootNode(node);
if (g.NavWindowingTarget)
is_focused = (g.NavWindowingTarget->DockNode == node);
else if (g.NavWindow && g.NavWindow->RootWindowForTitleBarHighlight == host_window->RootWindow && root_node->LastFocusedNodeID == node->ID)
is_focused = true;
// Collapse button changes shape and display a list
if (IsPopupOpen("#TabListMenu"))
{
@ -10906,6 +10948,13 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
if (BeginPopup("#TabListMenu"))
{
is_focused = true;
if (tab_bar->Tabs.Size == 1)
{
if (MenuItem("Hide tab bar", NULL, node->IsHiddenTabBar))
node->WantHiddenTabBarToggle = true;
}
else
{
for (int tab_n = 0; tab_n < tab_bar->Tabs.Size; tab_n++)
{
ImGuiTabItem* tab = &tab_bar->Tabs[tab_n];
@ -10915,6 +10964,7 @@ static void ImGui::DockNodeUpdateTabBar(ImGuiDockNode* node, ImGuiWindow* host_w
SameLine();
Text(" ");
}
}
EndPopup();
}
}
@ -11301,9 +11351,16 @@ static void ImGui::DockNodePreviewDockRender(ImGuiWindow* host_window, ImGuiDock
ImRect tab_bar_rect = DockNodeCalcTabBarRect(&data->FutureNode);
ImVec2 tab_pos = tab_bar_rect.Min;
if (host_node && host_node->TabBar)
{
if (!host_node->IsHiddenTabBar)
tab_pos.x += host_node->TabBar->OffsetMax + g.Style.ItemInnerSpacing.x; // We don't use OffsetNewTab because when using non-persistent-order tab bar it is incremented with each Tab submission.
else
tab_pos.x += g.Style.ItemInnerSpacing.x + TabItemCalcSize(host_node->Windows[0]->Name, host_node->Windows[0]->HasCloseButton).x;
}
else if (!(host_window->Flags & ImGuiWindowFlags_DockNodeHost))
{
tab_pos.x += g.Style.ItemInnerSpacing.x + TabItemCalcSize(host_window->Name, host_window->HasCloseButton).x; // Account for slight offset which will be added when changing from title bar to tab bar
}
// Draw tab shape/label preview (payload may be a loose window or a host window carrying multiple tabbed windows)
if (root_payload->DockNodeAsHost)
@ -11421,6 +11478,7 @@ void ImGui::DockNodeTreeMerge(ImGuiContext* ctx, ImGuiDockNode* parent_node, ImG
parent_node->InitFromFirstWindowPosSize = parent_node->InitFromFirstWindowViewport = false;
parent_node->VisibleWindow = merge_lead_child->VisibleWindow;
parent_node->IsCentralNode = (child_0 && child_0->IsCentralNode) || (child_1 && child_1->IsCentralNode);
parent_node->IsHiddenTabBar = merge_lead_child->IsHiddenTabBar;
parent_node->SizeRef = backup_last_explicit_size;
if (child_0)
@ -12215,6 +12273,9 @@ void ImGui::BeginDocked(ImGuiWindow* window, bool* p_open)
// Update window flag
IM_ASSERT((window->Flags & ImGuiWindowFlags_ChildWindow) == 0);
window->Flags |= ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_AlwaysUseWindowPadding | ImGuiWindowFlags_NoResize;
if (dock_node->IsHiddenTabBar)
window->Flags |= ImGuiWindowFlags_NoTitleBar;
else
window->Flags &= ~ImGuiWindowFlags_NoTitleBar; // Clear the NoTitleBar flag in case the user set it: confusingly enough we need a title bar height so we are correctly offset, but it won't be displayed!
// Save new dock order only if the tab bar is active
@ -12391,6 +12452,7 @@ static void ImGui::DockSettingsHandler_ReadLine(ImGuiContext* ctx, ImGuiSettings
}
if (sscanf(line, " Split=%c%n", &c, &r) == 1) { line += r; if (c == 'X') node.SplitAxis = ImGuiAxis_X; else if (c == 'Y') node.SplitAxis = ImGuiAxis_Y; }
if (sscanf(line, " CentralNode=%d%n", &x, &r) == 1) { line += r; node.IsCentralNode = (x != 0); }
if (sscanf(line, " HiddenTabBar=%d%n", &x, &r) == 1) { line += r; node.IsHiddenTabBar = (x != 0); }
if (sscanf(line, " SelectedTab=0x%08X%n", &node.SelectedTabID,&r) == 1) { line += r; }
ImGuiDockContext* dc = ctx->DockContext;
if (node.ParentID != 0)
@ -12410,6 +12472,7 @@ static void DockSettingsHandler_DockNodeToSettings(ImGuiDockContext* dc, ImGuiDo
node_settings.Depth = (char)depth;
node_settings.IsDockSpace = (char)node->IsDockSpace;
node_settings.IsCentralNode = (char)node->IsCentralNode;
node_settings.IsHiddenTabBar = (char)node->IsHiddenTabBar;
node_settings.Pos = ImVec2ih((short)node->Pos.x, (short)node->Pos.y);
node_settings.Size = ImVec2ih((short)node->Size.x, (short)node->Size.y);
node_settings.SizeRef = ImVec2ih((short)node->SizeRef.x, (short)node->SizeRef.y);
@ -12457,7 +12520,9 @@ static void ImGui::DockSettingsHandler_WriteAll(ImGuiContext* ctx, ImGuiSettings
if (node_settings->SplitAxis != ImGuiAxis_None)
buf->appendf(" Split=%c", (node_settings->SplitAxis == ImGuiAxis_X) ? 'X' : 'Y');
if (node_settings->IsCentralNode)
buf->appendf(" CentralNode=%d", node_settings->IsCentralNode);
buf->appendf(" CentralNode=1");
if (node_settings->IsHiddenTabBar)
buf->appendf(" HiddenTabBar=1");
if (node_settings->SelectedTabID)
buf->appendf(" SelectedTab=0x%08X", node_settings->SelectedTabID);
@ -13317,7 +13382,7 @@ void ImGui::ShowDockingDebug()
IM_ASSERT(node->ChildNodes[1] == NULL || node->ChildNodes[1]->ParentNode == node);
ImGui::BulletText("Pos (%.0f,%.0f), Size (%.0f, %.0f) Ref (%.0f, %.0f)",
node->Pos.x, node->Pos.y, node->Size.x, node->Size.y, node->SizeRef.x, node->SizeRef.y);
ImGui::BulletText("Flags %02X%s%s%s%s",
ImGui::BulletText("Flags 0x%02X%s%s%s%s",
node->Flags, node->IsDockSpace ? ", IsDockSpace" : "", node->IsCentralNode ? ", IsCentralNode" : "",
(GImGui->FrameCount - node->LastFrameAlive < 2) ? ", IsAlive" : "", (GImGui->FrameCount - node->LastFrameActive < 2) ? ", IsActive" : "");
if (node->ChildNodes[0])

6
imgui_draw.cpp
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@ -211,7 +211,7 @@ void ImGui::StyleColorsDark(ImGuiStyle* dst)
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_DockingPreview] = colors[ImGuiCol_HeaderActive] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);;
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
colors[ImGuiCol_PlotLines] = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
@ -268,7 +268,7 @@ void ImGui::StyleColorsClassic(ImGuiStyle* dst)
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_DockingPreview] = colors[ImGuiCol_Header] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);;
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
@ -326,7 +326,7 @@ void ImGui::StyleColorsLight(ImGuiStyle* dst)
colors[ImGuiCol_TabUnfocusedActive] = ImLerp(colors[ImGuiCol_TabActive], colors[ImGuiCol_TitleBg], 0.40f);
colors[ImGuiCol_TabHovered] = colors[ImGuiCol_HeaderHovered];
colors[ImGuiCol_DockingPreview] = colors[ImGuiCol_Header] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);;
colors[ImGuiCol_DockingEmptyBg] = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
colors[ImGuiCol_PlotLines] = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);
colors[ImGuiCol_PlotLinesHovered] = ImVec4(1.00f, 0.43f, 0.35f, 1.00f);
colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);

2
imgui_internal.h
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@ -780,11 +780,13 @@ struct ImGuiDockNode
bool IsVisible :1; // Set to false when the node is hidden (usually disabled as it has no active window)
bool IsDockSpace :1; // Root node was created by a DockSpace() call.
bool IsCentralNode :1;
bool IsHiddenTabBar :1;
bool HasCloseButton :1;
bool HasCollapseButton :1;
bool WantCloseAll :1; // Set when closing all tabs at once.
bool WantLockSizeOnce :1;
bool WantMouseMove :1; // After a node extraction we need to transition toward moving the newly created host window
bool WantHiddenTabBarToggle :1;
ImGuiDockNode(ImGuiID id);
~ImGuiDockNode();