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TreeNode: rename/rework ImGuiNavTreeNodeData system to be usable by more features. (#2920, #1131, #7553)

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Reworked to it is easier during TreeNode code to request extra data to be stored.
This commit is contained in:
ocornut
2024-07-03 18:25:01 +02:00
parent 0a73c6ec3f
commit 2d0baaabe6
4 changed files with 57 additions and 32 deletions
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56
imgui_widgets.cpp
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@@ -6310,6 +6310,21 @@ bool ImGui::TreeNodeUpdateNextOpen(ImGuiID id, ImGuiTreeNodeFlags flags)
return is_open;
}
// Store ImGuiTreeNodeStackData for just submitted node.
static void TreeNodeStoreStackData(ImGuiTreeNodeFlags flags)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
g.TreeNodeStack.resize(g.TreeNodeStack.Size + 1);
ImGuiTreeNodeStackData* tree_node_data = &g.TreeNodeStack.back();
tree_node_data->ID = g.LastItemData.ID;
tree_node_data->TreeFlags = flags;
tree_node_data->InFlags = g.LastItemData.InFlags;
tree_node_data->NavRect = g.LastItemData.NavRect;
window->DC.TreeHasStackDataDepthMask |= (1 << window->DC.TreeDepth);
}
bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* label, const char* label_end)
{
ImGuiWindow* window = GetCurrentWindow();
@@ -6379,20 +6394,19 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
// For this purpose we essentially compare if g.NavIdIsAlive went from 0 to 1 between TreeNode() and TreePop().
// It will become tempting to enable ImGuiTreeNodeFlags_NavLeftJumpsBackHere by default or move it to ImGuiStyle.
// Currently only supports 32 level deep and we are fine with (1 << Depth) overflowing into a zero, easy to increase.
if (is_open && !g.NavIdIsAlive && (flags & ImGuiTreeNodeFlags_NavLeftJumpsBackHere) && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
if (g.NavMoveDir == ImGuiDir_Left && g.NavWindow == window && NavMoveRequestButNoResultYet())
{
g.NavTreeNodeStack.resize(g.NavTreeNodeStack.Size + 1);
ImGuiNavTreeNodeData* nav_tree_node_data = &g.NavTreeNodeStack.back();
nav_tree_node_data->ID = id;
nav_tree_node_data->InFlags = g.LastItemData.InFlags;
nav_tree_node_data->NavRect = g.LastItemData.NavRect;
window->DC.TreeJumpToParentOnPopMask |= (1 << window->DC.TreeDepth);
}
bool store_tree_node_stack_data = false;
if (!(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
{
if ((flags & ImGuiTreeNodeFlags_NavLeftJumpsBackHere) && is_open && !g.NavIdIsAlive)
if (g.NavMoveDir == ImGuiDir_Left && g.NavWindow == window && NavMoveRequestButNoResultYet())
store_tree_node_stack_data = true;
}
const bool is_leaf = (flags & ImGuiTreeNodeFlags_Leaf) != 0;
if (!item_add)
{
if (store_tree_node_stack_data && is_open)
TreeNodeStoreStackData(flags); // Call before TreePushOverrideID()
if (is_open && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
TreePushOverrideID(id);
IMGUI_TEST_ENGINE_ITEM_INFO(g.LastItemData.ID, label, g.LastItemData.StatusFlags | (is_leaf ? 0 : ImGuiItemStatusFlags_Openable) | (is_open ? ImGuiItemStatusFlags_Opened : 0));
@@ -6533,8 +6547,11 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
else
RenderText(text_pos, label, label_end, false);
if (store_tree_node_stack_data && is_open)
TreeNodeStoreStackData(flags); // Call before TreePushOverrideID()
if (is_open && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
TreePushOverrideID(id);
IMGUI_TEST_ENGINE_ITEM_INFO(id, label, g.LastItemData.StatusFlags | (is_leaf ? 0 : ImGuiItemStatusFlags_Openable) | (is_open ? ImGuiItemStatusFlags_Opened : 0));
return is_open;
}
@@ -6573,16 +6590,19 @@ void ImGui::TreePop()
window->DC.TreeDepth--;
ImU32 tree_depth_mask = (1 << window->DC.TreeDepth);
// Handle Left arrow to move to parent tree node (when ImGuiTreeNodeFlags_NavLeftJumpsBackHere is enabled)
if (window->DC.TreeJumpToParentOnPopMask & tree_depth_mask) // Only set during request
if (window->DC.TreeHasStackDataDepthMask & tree_depth_mask) // Only set during request
{
ImGuiNavTreeNodeData* nav_tree_node_data = &g.NavTreeNodeStack.back();
IM_ASSERT(nav_tree_node_data->ID == window->IDStack.back());
if (g.NavIdIsAlive && g.NavMoveDir == ImGuiDir_Left && g.NavWindow == window && NavMoveRequestButNoResultYet())
NavMoveRequestResolveWithPastTreeNode(&g.NavMoveResultLocal, nav_tree_node_data);
g.NavTreeNodeStack.pop_back();
ImGuiTreeNodeStackData* data = &g.TreeNodeStack.back();
IM_ASSERT(data->ID == window->IDStack.back());
if (data->TreeFlags & ImGuiTreeNodeFlags_NavLeftJumpsBackHere)
{
// Handle Left arrow to move to parent tree node (when ImGuiTreeNodeFlags_NavLeftJumpsBackHere is enabled)
if (g.NavIdIsAlive && g.NavMoveDir == ImGuiDir_Left && g.NavWindow == window && NavMoveRequestButNoResultYet())
NavMoveRequestResolveWithPastTreeNode(&g.NavMoveResultLocal, data);
}
g.TreeNodeStack.pop_back();
window->DC.TreeHasStackDataDepthMask &= ~tree_depth_mask;
}
window->DC.TreeJumpToParentOnPopMask &= tree_depth_mask - 1;
IM_ASSERT(window->IDStack.Size > 1); // There should always be 1 element in the IDStack (pushed during window creation). If this triggers you called TreePop/PopID too much.
PopID();