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Docking: docked windows honor ImGuiCol_WindowBg. Host window in charge of rendering seams. (#2700, #2539 + Docked windows honor display their border properly. (#2522)

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Plus: better support for transparent one in nodes
Side effects: DockContextBindNodeToWindow doesn't alter node->IsVisible.
Side effects: ImDrawList:: _ResetForNewFrame() needs to merge, sane (in case of
(Amended, force-pushed)
This commit is contained in:
ocornut
2021-12-02 22:44:49 +01:00
parent bf80204e63
commit b16f738d04
5 changed files with 88 additions and 21 deletions
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94
imgui.cpp
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@ -4528,6 +4528,8 @@ static void AddWindowToDrawData(ImGuiWindow* window, int layer)
ImGuiContext& g = *GImGui;
ImGuiViewportP* viewport = window->Viewport;
g.IO.MetricsRenderWindows++;
if (window->Flags & ImGuiWindowFlags_DockNodeHost)
window->DrawList->ChannelsMerge();
AddDrawListToDrawData(&viewport->DrawDataBuilder.Layers[layer], window->DrawList);
for (int i = 0; i < window->DC.ChildWindows.Size; i++)
{
@ -4709,6 +4711,9 @@ void ImGui::EndFrame()
// Update navigation: CTRL+Tab, wrap-around requests
NavEndFrame();
// Update docking
DockContextEndFrame(&g);
SetCurrentViewport(NULL, NULL);
// Drag and Drop: Elapse payload (if delivered, or if source stops being submitted)
@ -5653,11 +5658,11 @@ ImVec2 ImGui::CalcWindowNextAutoFitSize(ImGuiWindow* window)
return size_final;
}
static ImGuiCol GetWindowBgColorIdxFromFlags(ImGuiWindowFlags flags)
static ImGuiCol GetWindowBgColorIdx(ImGuiWindow* window)
{
if (flags & (ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_Popup))
if (window->Flags & (ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_Popup))
return ImGuiCol_PopupBg;
if (flags & ImGuiWindowFlags_ChildWindow)
if ((window->Flags & ImGuiWindowFlags_ChildWindow) && !window->DockIsActive)
return ImGuiCol_ChildBg;
return ImGuiCol_WindowBg;
}
@ -5950,7 +5955,7 @@ void ImGui::RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar
if (g.DragDropPayload.IsDataType(IMGUI_PAYLOAD_TYPE_WINDOW) && *(ImGuiWindow**)g.DragDropPayload.Data == window)
is_docking_transparent_payload = true;
ImU32 bg_col = GetColorU32(GetWindowBgColorIdxFromFlags(flags));
ImU32 bg_col = GetColorU32(GetWindowBgColorIdx(window));
if (window->ViewportOwned)
{
// No alpha
@ -5976,8 +5981,21 @@ void ImGui::RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar
if (override_alpha)
bg_col = (bg_col & ~IM_COL32_A_MASK) | (IM_F32_TO_INT8_SAT(alpha) << IM_COL32_A_SHIFT);
}
window->DrawList->AddRectFilled(window->Pos + ImVec2(0, window->TitleBarHeight()), window->Pos + window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? 0 : ImDrawFlags_RoundCornersBottom);
// Render, for docked windows and host windows we ensure bg goes before decorations
ImDrawList* bg_draw_list = window->DockIsActive ? window->DockNode->HostWindow->DrawList : window->DrawList;
if (window->DockIsActive || (flags & ImGuiWindowFlags_DockNodeHost))
bg_draw_list->ChannelsSetCurrent(0);
if (window->DockIsActive)
window->DockNode->LastBgColor = bg_col;
bg_draw_list->AddRectFilled(window->Pos + ImVec2(0, window->TitleBarHeight()), window->Pos + window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? 0 : ImDrawFlags_RoundCornersBottom);
if (window->DockIsActive || (flags & ImGuiWindowFlags_DockNodeHost))
bg_draw_list->ChannelsSetCurrent(1);
}
if (window->DockIsActive)
window->DockNode->IsBgDrawnThisFrame = true;
// Title bar
// (when docked, DockNode are drawing their own title bar. Individual windows however do NOT set the _NoTitleBar flag,
@ -6346,6 +6364,11 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->IDStack.resize(1);
window->DrawList->_ResetForNewFrame();
window->DC.CurrentTableIdx = -1;
if (flags & ImGuiWindowFlags_DockNodeHost)
{
window->DrawList->ChannelsSplit(2);
window->DrawList->ChannelsSetCurrent(1); // Render decorations on channel 1 as we will render the backgrounds manually later
}
// Restore buffer capacity when woken from a compacted state, to avoid
if (window->MemoryCompacted)
@ -12786,6 +12809,9 @@ void ImGui::DestroyPlatformWindows()
// | BeginDockableDragDropTarget()
// | - DockNodePreviewDockRender()
//-----------------------------------------------------------------------------
// - EndFrame()
// | DockContextEndFrame()
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Docking: Internal Types
@ -12940,6 +12966,7 @@ namespace ImGui
// - DockContextRebuildNodes()
// - DockContextNewFrameUpdateUndocking()
// - DockContextNewFrameUpdateDocking()
// - DockContextEndFrame()
// - DockContextFindNodeByID()
// - DockContextBindNodeToWindow()
// - DockContextGenNodeID()
@ -13075,6 +13102,22 @@ void ImGui::DockContextNewFrameUpdateDocking(ImGuiContext* ctx)
DockNodeUpdate(node);
}
void ImGui::DockContextEndFrame(ImGuiContext* ctx)
{
// Draw backgrounds of node missing their window
ImGuiContext& g = *ctx;
ImGuiDockContext* dc = &g.DockContext;
for (int n = 0; n < dc->Nodes.Data.Size; n++)
if (ImGuiDockNode* node = (ImGuiDockNode*)dc->Nodes.Data[n].val_p)
if (node->LastFrameActive == g.FrameCount && node->IsVisible && node->HostWindow && node->IsLeafNode() && !node->IsBgDrawnThisFrame)
{
ImRect bg_rect(node->Pos + ImVec2(0.0f, GetFrameHeight()), node->Pos + node->Size);
ImDrawFlags bg_rounding_flags = CalcRoundingFlagsForRectInRect(bg_rect, node->HostWindow->Rect(), DOCKING_SPLITTER_SIZE);
node->HostWindow->DrawList->ChannelsSetCurrent(0);
node->HostWindow->DrawList->AddRectFilled(bg_rect.Min, bg_rect.Max, node->LastBgColor, node->HostWindow->WindowRounding, bg_rounding_flags);
}
}
static ImGuiDockNode* ImGui::DockContextFindNodeByID(ImGuiContext* ctx, ImGuiID id)
{
return (ImGuiDockNode*)ctx->DockContext.Nodes.GetVoidPtr(id);
@ -13592,6 +13635,7 @@ ImGuiDockNode::ImGuiDockNode(ImGuiID id)
SplitAxis = ImGuiAxis_None;
State = ImGuiDockNodeState_Unknown;
LastBgColor = IM_COL32_WHITE;
HostWindow = VisibleWindow = NULL;
CentralNode = OnlyNodeWithWindows = NULL;
CountNodeWithWindows = 0;
@ -13603,6 +13647,7 @@ ImGuiDockNode::ImGuiDockNode(ImGuiID id)
AuthorityForViewport = ImGuiDataAuthority_Auto;
IsVisible = true;
IsFocused = HasCloseButton = HasWindowMenuButton = HasCentralNodeChild = false;
IsBgDrawnThisFrame = false;
WantCloseAll = WantLockSizeOnce = WantMouseMove = WantHiddenTabBarUpdate = WantHiddenTabBarToggle = false;
}
@ -14044,6 +14089,7 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
ImGuiContext& g = *GImGui;
IM_ASSERT(node->LastFrameActive != g.FrameCount);
node->LastFrameAlive = g.FrameCount;
node->IsBgDrawnThisFrame = false;
node->CentralNode = node->OnlyNodeWithWindows = NULL;
if (node->IsRootNode())
@ -14186,6 +14232,7 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
window_flags |= ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoNavFocus | ImGuiWindowFlags_NoCollapse;
window_flags |= ImGuiWindowFlags_NoTitleBar;
SetNextWindowBgAlpha(0.0f); // Don't set ImGuiWindowFlags_NoBackground because it disables borders
PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
Begin(window_label, NULL, window_flags);
PopStyleVar();
@ -14224,15 +14271,6 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
if (g.NavWindow && g.NavWindow->RootWindow->DockNode && g.NavWindow->RootWindow->ParentWindow == host_window)
node->LastFocusedNodeId = g.NavWindow->RootWindow->DockNode->ID;
// We need to draw a background at the root level if requested by ImGuiDockNodeFlags_PassthruCentralNode, but we will only know the correct pos/size
// _after_ processing the resizing splitters. So we are using the DrawList channel splitting facility to submit drawing primitives out of order!
const bool render_dockspace_bg = node->IsRootNode() && host_window && (node_flags & ImGuiDockNodeFlags_PassthruCentralNode) != 0;
if (render_dockspace_bg)
{
host_window->DrawList->ChannelsSplit(2);
host_window->DrawList->ChannelsSetCurrent(1);
}
// Register a hit-test hole in the window unless we are currently dragging a window that is compatible with our dockspace
ImGuiDockNode* central_node = node->CentralNode;
const bool central_node_hole = node->IsRootNode() && host_window && (node_flags & ImGuiDockNodeFlags_PassthruCentralNode) != 0 && central_node != NULL && central_node->IsEmpty();
@ -14265,15 +14303,25 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
// Update position/size, process and draw resizing splitters
if (node->IsRootNode() && host_window)
{
host_window->DrawList->ChannelsSetCurrent(1);
DockNodeTreeUpdatePosSize(node, host_window->Pos, host_window->Size);
DockNodeTreeUpdateSplitter(node);
}
// Draw empty node background (currently can only be the Central Node)
if (host_window && node->IsEmpty() && node->IsVisible && !(node_flags & ImGuiDockNodeFlags_PassthruCentralNode))
host_window->DrawList->AddRectFilled(node->Pos, node->Pos + node->Size, GetColorU32(ImGuiCol_DockingEmptyBg));
if (host_window && node->IsEmpty() && node->IsVisible)
{
host_window->DrawList->ChannelsSetCurrent(0);
node->LastBgColor = (node_flags & ImGuiDockNodeFlags_PassthruCentralNode) ? 0 : GetColorU32(ImGuiCol_DockingEmptyBg);
if (node->LastBgColor != 0)
host_window->DrawList->AddRectFilled(node->Pos, node->Pos + node->Size, node->LastBgColor);
node->IsBgDrawnThisFrame = true;
}
// Draw whole dockspace background if ImGuiDockNodeFlags_PassthruCentralNode if set.
// We need to draw a background at the root level if requested by ImGuiDockNodeFlags_PassthruCentralNode, but we will only know the correct pos/size
// _after_ processing the resizing splitters. So we are using the DrawList channel splitting facility to submit drawing primitives out of order!
const bool render_dockspace_bg = node->IsRootNode() && host_window && (node_flags & ImGuiDockNodeFlags_PassthruCentralNode) != 0;
if (render_dockspace_bg && node->IsVisible)
{
host_window->DrawList->ChannelsSetCurrent(0);
@ -14281,10 +14329,11 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
RenderRectFilledWithHole(host_window->DrawList, node->Rect(), central_node->Rect(), GetColorU32(ImGuiCol_WindowBg), 0.0f);
else
host_window->DrawList->AddRectFilled(node->Pos, node->Pos + node->Size, GetColorU32(ImGuiCol_WindowBg), 0.0f);
host_window->DrawList->ChannelsMerge();
}
// Draw and populate Tab Bar
if (host_window)
host_window->DrawList->ChannelsSetCurrent(1);
if (host_window && node->Windows.Size > 0)
{
DockNodeUpdateTabBar(node, host_window);
@ -14319,7 +14368,13 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
// Render outer borders last (after the tab bar)
if (node->IsRootNode())
{
host_window->DrawList->ChannelsSetCurrent(1);
RenderWindowOuterBorders(host_window);
}
// Further rendering (= hosted windows background) will be drawn on layer 0
host_window->DrawList->ChannelsSetCurrent(0);
}
// End host window
@ -15330,7 +15385,8 @@ void ImGui::DockNodeTreeUpdateSplitter(ImGuiDockNode* node)
float cur_size_1 = child_1->Size[axis];
float min_size_0 = resize_limits[0] - child_0->Pos[axis];
float min_size_1 = child_1->Pos[axis] + child_1->Size[axis] - resize_limits[1];
if (SplitterBehavior(bb, GetID("##Splitter"), axis, &cur_size_0, &cur_size_1, min_size_0, min_size_1, WINDOWS_HOVER_PADDING, WINDOWS_RESIZE_FROM_EDGES_FEEDBACK_TIMER))
ImU32 bg_col = GetColorU32(ImGuiCol_WindowBg);
if (SplitterBehavior(bb, GetID("##Splitter"), axis, &cur_size_0, &cur_size_1, min_size_0, min_size_1, WINDOWS_HOVER_PADDING, WINDOWS_RESIZE_FROM_EDGES_FEEDBACK_TIMER, bg_col))
{
if (touching_nodes[0].Size > 0 && touching_nodes[1].Size > 0)
{
@ -16061,7 +16117,9 @@ static ImGuiDockNode* ImGui::DockContextBindNodeToWindow(ImGuiContext* ctx, ImGu
}
// Add window to node
bool node_was_visible = node->IsVisible;
DockNodeAddWindow(node, window, true);
node->IsVisible = node_was_visible; // Don't mark visible right away (so DockContextEndFrame() doesn't render it, maybe other side effects? will see)
IM_ASSERT(node == window->DockNode);
return node;
}