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Fixed _ChildWindows from leaking docking hierarchy. Added ImGuiFocusedFlags_DockHierarchy and ImGuiHoveredFlags_DockHierarchy.

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This commit is contained in:
ocornut 2021-09-08 16:49:35 +02:00
parent cfb837203c
commit 6b1e094cfb
5 changed files with 32 additions and 12 deletions
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8
docs/CHANGELOG.txt
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@ -108,6 +108,10 @@ Breaking Changes:
- Removed GetWindowContentRegionWidth() function. keep inline redirection helper.
Can use 'GetWindowContentRegionMax().x - GetWindowContentRegionMin().x' instead but it's not
very useful in practice, and the only use of it in the demo was illfit.
- (Docking branch) IsWindowFocused() and IsWindowHovered() with only the _ChildWindows flag
and without the _RootWindow flag used to leak docking hierarchy, so a docked window would
return as the child of the window hosting the dockspace. This was inconsistent and incorrect
with other behaviors so we fixed it. Added a new _DockHierarchy flag to opt-in this behavior.
Other Changes:
@ -137,6 +141,10 @@ Other Changes:
Docking+Viewports Branch:
- IsWindowFocused: Fixed using ImGuiFocusedFlags_ChildWindows (without _RootWindow) from leaking the
docking hierarchy. Added ImGuiFocusedFlags_DockHierarchy flag to consider docking hierarchy in the test.
- IsWindowHovered: Fixed using ImGuiHoveredFlags_ChildWindows (without _RootWindow) from leaking the
docking hierarchy. Added ImGuiHoveredFlags_DockHierarchy flag to consider docking hierarchy in the test.
- Docking: fixed settings load issue when mouse wheeling. (#4310)
- Drag and Drop: Fixed using BeginDragDropSource() or BeginDragDropTarget() inside a Begin() that
returned false because the window is docked. (#4515)

20
imgui.cpp
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@ -4024,7 +4024,7 @@ void ImGui::UpdateHoveredWindowAndCaptureFlags()
// Modal windows prevents mouse from hovering behind them.
ImGuiWindow* modal_window = GetTopMostPopupModal();
if (modal_window && g.HoveredWindow && !IsWindowChildOf(g.HoveredWindow->RootWindowDockTree, modal_window))
if (modal_window && g.HoveredWindow && !IsWindowChildOf(g.HoveredWindow->RootWindowDockTree, modal_window, true))
clear_hovered_windows = true;
// Disabled mouse?
@ -7254,15 +7254,16 @@ void ImGui::PopTextWrapPos()
window->DC.TextWrapPosStack.pop_back();
}
// FIXME: We are exposing the docking hierarchy to end-user here (via IsWindowHovered, IsWindowFocused) which is unusual.
bool ImGui::IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent)
bool ImGui::IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent, bool dock_hierarchy)
{
if (window->RootWindowDockTree == potential_parent)
if ((dock_hierarchy ? window->RootWindowDockTree : window->RootWindow) == potential_parent)
return true;
while (window != NULL)
{
if (window == potential_parent)
return true;
if (window == (dock_hierarchy ? window->RootWindowDockTree : window->RootWindow))
return false;
window = window->ParentWindow;
}
return false;
@ -7294,13 +7295,14 @@ bool ImGui::IsWindowHovered(ImGuiHoveredFlags flags)
if ((flags & ImGuiHoveredFlags_AnyWindow) == 0)
{
IM_ASSERT(cur_window); // Not inside a Begin()/End()
const bool dock_hierarchy = (flags & ImGuiHoveredFlags_DockHierarchy) != 0;
if (flags & ImGuiHoveredFlags_RootWindow)
cur_window = cur_window->RootWindow;
cur_window = dock_hierarchy ? cur_window->RootWindowDockTree : cur_window->RootWindow;
bool result;
if (flags & ImGuiHoveredFlags_ChildWindows)
result = IsWindowChildOf(ref_window, cur_window);
result = IsWindowChildOf(ref_window, cur_window, dock_hierarchy);
else
result = (ref_window == cur_window);
if (!result)
@ -7325,13 +7327,15 @@ bool ImGui::IsWindowFocused(ImGuiFocusedFlags flags)
return false;
if (flags & ImGuiFocusedFlags_AnyWindow)
return true;
IM_ASSERT(cur_window); // Not inside a Begin()/End()
const bool dock_hierarchy = (flags & ImGuiHoveredFlags_DockHierarchy) != 0;
if (flags & ImGuiHoveredFlags_RootWindow)
cur_window = cur_window->RootWindow;
cur_window = dock_hierarchy ? cur_window->RootWindowDockTree : cur_window->RootWindow;
if (flags & ImGuiHoveredFlags_ChildWindows)
return IsWindowChildOf(ref_window, cur_window);
return IsWindowChildOf(ref_window, cur_window, dock_hierarchy);
else
return (ref_window == cur_window);
}

6
imgui.h
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@ -1312,7 +1312,7 @@ enum ImGuiFocusedFlags_
ImGuiFocusedFlags_ChildWindows = 1 << 0, // Return true if any children of the window is focused
ImGuiFocusedFlags_RootWindow = 1 << 1, // Test from root window (top most parent of the current hierarchy)
ImGuiFocusedFlags_AnyWindow = 1 << 2, // Return true if any window is focused. Important: If you are trying to tell how to dispatch your low-level inputs, do NOT use this. Use 'io.WantCaptureMouse' instead! Please read the FAQ!
//ImGuiFocusedFlags_DockHierarchy = 1 << 3, // Consider docking hierarchy (treat dockspace host as parent of docked window)
ImGuiFocusedFlags_DockHierarchy = 1 << 3, // Consider docking hierarchy (treat dockspace host as parent of docked window)
ImGuiFocusedFlags_RootAndChildWindows = ImGuiFocusedFlags_RootWindow | ImGuiFocusedFlags_ChildWindows
};
@ -1325,7 +1325,7 @@ enum ImGuiHoveredFlags_
ImGuiHoveredFlags_ChildWindows = 1 << 0, // IsWindowHovered() only: Return true if any children of the window is hovered
ImGuiHoveredFlags_RootWindow = 1 << 1, // IsWindowHovered() only: Test from root window (top most parent of the current hierarchy)
ImGuiHoveredFlags_AnyWindow = 1 << 2, // IsWindowHovered() only: Return true if any window is hovered
//ImGuiHoveredFlags_DockHierarchy = 1 << 3, // IsWindowHovered() only: Consider docking hierarchy (treat dockspace host as parent of docked window)
ImGuiHoveredFlags_DockHierarchy = 1 << 3, // IsWindowHovered() only: Consider docking hierarchy (treat dockspace host as parent of docked window)
ImGuiHoveredFlags_AllowWhenBlockedByPopup = 1 << 4, // Return true even if a popup window is normally blocking access to this item/window
//ImGuiHoveredFlags_AllowWhenBlockedByModal = 1 << 4, // Return true even if a modal popup window is normally blocking access to this item/window. FIXME-TODO: Unavailable yet.
ImGuiHoveredFlags_AllowWhenBlockedByActiveItem = 1 << 5, // Return true even if an active item is blocking access to this item/window. Useful for Drag and Drop patterns.
@ -1346,7 +1346,7 @@ enum ImGuiDockNodeFlags_
ImGuiDockNodeFlags_NoDockingInCentralNode = 1 << 2, // Shared // Disable docking inside the Central Node, which will be always kept empty.
ImGuiDockNodeFlags_PassthruCentralNode = 1 << 3, // Shared // Enable passthru dockspace: 1) DockSpace() will render a ImGuiCol_WindowBg background covering everything excepted the Central Node when empty. Meaning the host window should probably use SetNextWindowBgAlpha(0.0f) prior to Begin() when using this. 2) When Central Node is empty: let inputs pass-through + won't display a DockingEmptyBg background. See demo for details.
ImGuiDockNodeFlags_NoSplit = 1 << 4, // Shared/Local // Disable splitting the node into smaller nodes. Useful e.g. when embedding dockspaces into a main root one (the root one may have splitting disabled to reduce confusion). Note: when turned off, existing splits will be preserved.
ImGuiDockNodeFlags_NoResize = 1 << 5, // Shared/Local // Disable resizing node using the splitter/separators. Useful with programatically setup dockspaces.
ImGuiDockNodeFlags_NoResize = 1 << 5, // Shared/Local // Disable resizing node using the splitter/separators. Useful with programmatically setup dockspaces.
ImGuiDockNodeFlags_AutoHideTabBar = 1 << 6 // Shared/Local // Tab bar will automatically hide when there is a single window in the dock node.
};

8
imgui_demo.cpp
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@ -2334,11 +2334,15 @@ static void ShowDemoWindowWidgets()
"IsWindowFocused() = %d\n"
"IsWindowFocused(_ChildWindows) = %d\n"
"IsWindowFocused(_ChildWindows|_RootWindow) = %d\n"
"IsWindowFocused(_ChildWindows|_RootWindow|_DockHierarchy) = %d\n"
"IsWindowFocused(_RootWindow|_DockHierarchy) = %d\n"
"IsWindowFocused(_RootWindow) = %d\n"
"IsWindowFocused(_AnyWindow) = %d\n",
ImGui::IsWindowFocused(),
ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows),
ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows | ImGuiFocusedFlags_RootWindow),
ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows | ImGuiFocusedFlags_RootWindow | ImGuiFocusedFlags_DockHierarchy),
ImGui::IsWindowFocused(ImGuiFocusedFlags_RootWindow | ImGuiFocusedFlags_DockHierarchy),
ImGui::IsWindowFocused(ImGuiFocusedFlags_RootWindow),
ImGui::IsWindowFocused(ImGuiFocusedFlags_AnyWindow));
@ -2350,6 +2354,8 @@ static void ShowDemoWindowWidgets()
"IsWindowHovered(_AllowWhenBlockedByActiveItem) = %d\n"
"IsWindowHovered(_ChildWindows) = %d\n"
"IsWindowHovered(_ChildWindows|_RootWindow) = %d\n"
"IsWindowHovered(_ChildWindows|_RootWindow|_DockHierarchy) = %d\n"
"IsWindowHovered(_RootWindow|_DockHierarchy) = %d\n"
"IsWindowHovered(_ChildWindows|_AllowWhenBlockedByPopup) = %d\n"
"IsWindowHovered(_RootWindow) = %d\n"
"IsWindowHovered(_AnyWindow) = %d\n",
@ -2358,6 +2364,8 @@ static void ShowDemoWindowWidgets()
ImGui::IsWindowHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem),
ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows),
ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_RootWindow),
ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_DockHierarchy),
ImGui::IsWindowHovered(ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_DockHierarchy),
ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_AllowWhenBlockedByPopup),
ImGui::IsWindowHovered(ImGuiHoveredFlags_RootWindow),
ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow));

2
imgui_internal.h
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@ -2557,7 +2557,7 @@ namespace ImGui
IMGUI_API ImGuiWindow* FindWindowByName(const char* name);
IMGUI_API void UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags flags, ImGuiWindow* parent_window);
IMGUI_API ImVec2 CalcWindowNextAutoFitSize(ImGuiWindow* window);
IMGUI_API bool IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent);
IMGUI_API bool IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent, bool dock_hierarchy);
IMGUI_API bool IsWindowAbove(ImGuiWindow* potential_above, ImGuiWindow* potential_below);
IMGUI_API bool IsWindowNavFocusable(ImGuiWindow* window);
IMGUI_API void SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond = 0);