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Nav: TreeNode: Added ImGuiTreeNodeFlags_NavCloseFromChild flag, allow closing a TreeNode() from any of child. The explicit flag is not great, perhaps allowing some form of inheritance would help. (#787, #1079)

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This commit is contained in:
omar 2018-02-02 17:47:05 +01:00
parent 9120938200
commit ce9d7baaba
3 changed files with 24 additions and 1 deletions
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22
imgui.cpp
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@ -5924,6 +5924,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->DC.TextWrapPosStack.resize(0);
window->DC.ColumnsSet = NULL;
window->DC.TreeDepth = 0;
window->DC.TreeDepthMayCloseOnPop = 0x00;
window->DC.StateStorage = &window->StateStorage;
window->DC.GroupStack.resize(0);
window->MenuColumns.Update(3, style.ItemSpacing.x, window_just_activated_by_user);
@ -7883,6 +7884,13 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
// (Ideally we'd want to add a flag for the user to specify if we want the hit test to be done up to the right side of the content or not)
const ImRect interact_bb = display_frame ? bb : ImRect(bb.Min.x, bb.Min.y, bb.Min.x + text_width + style.ItemSpacing.x*2, bb.Max.y);
bool is_open = TreeNodeBehaviorIsOpen(id, flags);
// Store a flag for the current depth to tell if we will allow closing this node when navigating one of its child.
// For this purpose we essentially compare if g.NavIdIsAlive went from 0 to 1 between TreeNode() and TreePop().
// This is currently only support 32 level deep and we are fine with (1 << Depth) overflowing into a zero.
if (is_open && !g.NavIdIsAlive && (flags & ImGuiTreeNodeFlags_NavCloseFromChild) && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
window->DC.TreeDepthMayCloseOnPop |= (1 << window->DC.TreeDepth);
if (!ItemAdd(interact_bb, id))
{
if (is_open && !(flags & ImGuiTreeNodeFlags_NoTreePushOnOpen))
@ -12529,9 +12537,21 @@ void ImGui::TreePushRawID(ImGuiID id)
void ImGui::TreePop()
{
ImGuiWindow* window = GetCurrentWindow();
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
Unindent();
window->DC.TreeDepth--;
if (g.NavMoveDir == ImGuiDir_Left && g.NavWindow == window && NavMoveRequestButNoResultYet())
if (g.NavIdIsAlive && (window->DC.TreeDepthMayCloseOnPop & (1 << window->DC.TreeDepth)))
{
ImGuiID id = window->IDStack.back();
window->DC.StateStorage->SetBool(id, false);
SetNavID(id, g.NavLayer);
NavMoveRequestCancel();
}
window->DC.TreeDepthMayCloseOnPop &= (1 << window->DC.TreeDepth) - 1;
PopID();
}

1
imgui.h
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@ -602,6 +602,7 @@ enum ImGuiTreeNodeFlags_
ImGuiTreeNodeFlags_FramePadding = 1 << 10, // Use FramePadding (even for an unframed text node) to vertically align text baseline to regular widget height. Equivalent to calling AlignTextToFramePadding().
//ImGuITreeNodeFlags_SpanAllAvailWidth = 1 << 11, // FIXME: TODO: Extend hit box horizontally even if not framed
//ImGuiTreeNodeFlags_NoScrollOnOpen = 1 << 12, // FIXME: TODO: Disable automatic scroll on TreePop() if node got just open and contents is not visible
ImGuiTreeNodeFlags_NavCloseFromChild = 1 << 13, // (WIP) Nav: left direction may close this TreeNode() when focusing on any child (items submitted between TreeNode and TreePop)
ImGuiTreeNodeFlags_CollapsingHeader = ImGuiTreeNodeFlags_Framed | ImGuiTreeNodeFlags_NoAutoOpenOnLog
// Obsolete names (will be removed)

2
imgui_internal.h
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@ -817,6 +817,7 @@ struct IMGUI_API ImGuiDrawContext
float PrevLineTextBaseOffset;
float LogLinePosY;
int TreeDepth;
ImU32 TreeDepthMayCloseOnPop; // Store a copy of !g.NavIdIsAlive for TreeDepth 0..31
ImGuiID LastItemId;
ImRect LastItemRect;
bool LastItemRectHoveredRect;
@ -855,6 +856,7 @@ struct IMGUI_API ImGuiDrawContext
CurrentLineTextBaseOffset = PrevLineTextBaseOffset = 0.0f;
LogLinePosY = -1.0f;
TreeDepth = 0;
TreeDepthMayCloseOnPop = 0x00;
LastItemId = 0;
LastItemRect = ImRect();
LastItemRectHoveredRect = false;