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Docking: Made DockBuilderSplitNode/DockNodeTreeSplit work even if the node doesn't have a size yet. (#2357, #2109)

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Followup to fa0ce4b7d, at that time I came to the conclusion that programmatic split couldn't work without knowing the size ahead of it. I forgot the reason for that.  May bite us back!
This commit is contained in:
omar 2019-02-18 16:23:54 +01:00
parent 3de440fda2
commit 5412cdf2c8
1 changed files with 2 additions and 0 deletions
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2
imgui.cpp
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@ -11959,6 +11959,7 @@ static void ImGui::DockNodePreviewDockRender(ImGuiWindow* host_window, ImGuiDock
void ImGui::DockNodeTreeSplit(ImGuiContext* ctx, ImGuiDockNode* parent_node, ImGuiAxis split_axis, int split_inheritor_child_idx, float split_ratio, ImGuiDockNode* new_node)
{
ImGuiContext& g = *GImGui;
IM_ASSERT(split_axis != ImGuiAxis_None);
ImGuiDockNode* child_0 = (new_node && split_inheritor_child_idx != 0) ? new_node : DockContextAddNode(ctx, 0);
@ -11976,6 +11977,7 @@ void ImGui::DockNodeTreeSplit(ImGuiContext* ctx, ImGuiDockNode* parent_node, ImG
parent_node->VisibleWindow = NULL;
float size_avail = (parent_node->Size[split_axis] - IMGUI_DOCK_SPLITTER_SIZE);
size_avail = ImMax(size_avail, g.Style.WindowMinSize[split_axis] * 2.0f);
IM_ASSERT(size_avail > 0.0f); // If you created a node manually with DockBuilderAddNode(), you need to also call DockBuilderSetNodeSize() before splitting.
child_0->SizeRef = child_1->SizeRef = parent_node->Size;
child_0->SizeRef[split_axis] = ImFloor(size_avail * split_ratio);