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Docking: Fixed crash issues using DockBuilderRemoveNode() in some situations. (#3111, #3179, #3203, #4295)

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If the deleted root node isn't part of a dockspace with a central node, it won't be "protected" but removed when last window gets removed.
This commit is contained in:
ocornut
2021-07-07 16:18:11 +02:00
parent 9e8e5ac363
commit cd4cc9ff0d
2 changed files with 10 additions and 3 deletions
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1
docs/CHANGELOG.txt
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@@ -144,6 +144,7 @@ Docking+Viewports Branch:
- Docking: Clicking on the right-most close button of a docking node closes all windows. (#4186)
- Docking: Fix IsWindowAppearing() and ImGuiCond_Appearing on docked windows. (#4177, #3982, #1497, #1061)
- Docking: Fix crash issues using DockBuilderRemoveNode() in some situations. (#3111, #3179, #3203, #4295) [@hsimyu]
- Docking: Reworked node flags saving/inheritance so that flags enforced by docked windows via the
DockNodeFlagsOverrideSet mechanism are are not left in empty dockspace nodes once the windows gets undocked.
(#4292, #3834, #3633, #3521, #3492, #3335, #2999, #2648)

12
imgui.cpp
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@@ -12617,7 +12617,8 @@ static ImGuiDockNode* ImGui::DockContextFindNodeByID(ImGuiContext* ctx, ImGuiID
ImGuiID ImGui::DockContextGenNodeID(ImGuiContext* ctx)
{
// Generate an ID for new node (the exact ID value doesn't matter as long as it is not already used)
// FIXME-OPT FIXME-DOCK: This is suboptimal, even if the node count is small enough not to be a worry. We should poke in ctx->Nodes to find a suitable ID faster.
// FIXME-OPT FIXME-DOCK: This is suboptimal, even if the node count is small enough not to be a worry.0
// We should poke in ctx->Nodes to find a suitable ID faster. Even more so trivial that ctx->Nodes lookup is already sorted.
ImGuiID id = 0x0001;
while (DockContextFindNodeByID(ctx, id) != NULL)
id++;
@@ -15125,11 +15126,11 @@ void ImGui::DockBuilderSetNodeSize(ImGuiID node_id, ImVec2 size)
ImGuiID ImGui::DockBuilderAddNode(ImGuiID id, ImGuiDockNodeFlags flags)
{
ImGuiContext* ctx = GImGui;
ImGuiDockNode* node = NULL;
if (id != 0)
DockBuilderRemoveNode(id);
ImGuiDockNode* node = NULL;
if (flags & ImGuiDockNodeFlags_DockSpace)
{
DockSpace(id, ImVec2(0, 0), (flags & ~ImGuiDockNodeFlags_DockSpace) | ImGuiDockNodeFlags_KeepAliveOnly);
@@ -15152,6 +15153,10 @@ void ImGui::DockBuilderRemoveNode(ImGuiID node_id)
return;
DockBuilderRemoveNodeDockedWindows(node_id, true);
DockBuilderRemoveNodeChildNodes(node_id);
// Node may have moved or deleted if e.g. any merge happened
node = DockContextFindNodeByID(ctx, node_id);
if (node == NULL)
return;
if (node->IsCentralNode() && node->ParentNode)
node->ParentNode->SetLocalFlags(node->ParentNode->LocalFlags | ImGuiDockNodeFlags_CentralNode);
DockContextRemoveNode(ctx, node, true);
@@ -15334,11 +15339,12 @@ void ImGui::DockBuilderCopyNode(ImGuiID src_node_id, ImGuiID dst_node_id, ImVect
IM_ASSERT(dst_node_id != 0);
IM_ASSERT(out_node_remap_pairs != NULL);
DockBuilderRemoveNode(dst_node_id);
ImGuiDockNode* src_node = DockContextFindNodeByID(ctx, src_node_id);
IM_ASSERT(src_node != NULL);
out_node_remap_pairs->clear();
DockBuilderRemoveNode(dst_node_id);
DockBuilderCopyNodeRec(src_node, dst_node_id, out_node_remap_pairs);
IM_ASSERT((out_node_remap_pairs->Size % 2) == 0);