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Popups: Fix popups being closed by newly appearing windows. (#4317)

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* Popups/modals now remain open when new windows are created from within popup/modal begin stack.
* Modals are not closed when new window appears behind active modal.
Tested by "window_popup_interruptions"
This commit is contained in:
Rokas Kupstys
2021-07-27 16:47:18 +03:00
committed by ocornut
parent 657073a650
commit b38af0f522
4 changed files with 119 additions and 5 deletions
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114
imgui.cpp
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@ -948,6 +948,7 @@ static void RenderWindowDecorations(ImGuiWindow* window, const ImRec
static void RenderWindowTitleBarContents(ImGuiWindow* window, const ImRect& title_bar_rect, const char* name, bool* p_open);
static void RenderDimmedBackgroundBehindWindow(ImGuiWindow* window, ImU32 col);
static void RenderDimmedBackgrounds();
static ImGuiWindow* FindBlockingModal(ImGuiWindow* window);
// Viewports
static void UpdateViewportsNewFrame();
@ -3910,7 +3911,7 @@ void ImGui::UpdateHoveredWindowAndCaptureFlags()
// Modal windows prevents mouse from hovering behind them.
ImGuiWindow* modal_window = GetTopMostPopupModal();
if (modal_window && g.HoveredWindow && !IsWindowChildOf(g.HoveredWindow->RootWindow, modal_window, true))
if (modal_window && g.HoveredWindow && !IsWindowWithinBeginStackOf(g.HoveredWindow->RootWindow, modal_window))
clear_hovered_windows = true;
// Disabled mouse?
@ -4466,6 +4467,23 @@ static void ImGui::RenderDimmedBackgroundBehindWindow(ImGuiWindow* window, ImU32
}
}
ImGuiWindow* ImGui::FindBottomMostVisibleWindowWithinBeginStack(ImGuiWindow* parent_window)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* bottom_most_visible_window = parent_window;
for (int i = FindWindowDisplayIndex(parent_window); i >= 0; i--)
{
ImGuiWindow* window = g.Windows[i];
if (window->Flags & ImGuiWindowFlags_ChildWindow)
continue;
if (!IsWindowWithinBeginStackOf(window, parent_window))
break;
if (IsWindowActiveAndVisible(window))
bottom_most_visible_window = window;
}
return bottom_most_visible_window;
}
static void ImGui::RenderDimmedBackgrounds()
{
ImGuiContext& g = *GImGui;
@ -4477,8 +4495,9 @@ static void ImGui::RenderDimmedBackgrounds()
if (dim_bg_for_modal)
{
// Draw dimming behind modal
RenderDimmedBackgroundBehindWindow(modal_window, GetColorU32(ImGuiCol_ModalWindowDimBg, g.DimBgRatio));
// Draw dimming behind modal or a begin stack child, whichever comes first in draw order.
ImGuiWindow* dim_behind_window = FindBottomMostVisibleWindowWithinBeginStack(modal_window);
RenderDimmedBackgroundBehindWindow(dim_behind_window, GetColorU32(ImGuiCol_ModalWindowDimBg, g.DimBgRatio));
}
else if (dim_bg_for_window_list)
{
@ -5859,6 +5878,36 @@ void ImGui::UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags
}
}
// When a modal popup is open, newly created windows that want focus (i.e. are not popups and do not specify ImGuiWindowFlags_NoFocusOnAppearing)
// should be positioned behind that modal window, unless the window was created inside the modal begin-stack.
// In case of multiple stacked modals newly created window honors begin stack order and does not go below its own modal parent.
// - Window // FindBlockingModal() returns Modal1
// - Window // .. returns Modal1
// - Modal1 // .. returns Modal2
// - Window // .. returns Modal2
// - Window // .. returns Modal2
// - Modal2 // .. returns Modal2
static ImGuiWindow* ImGui::FindBlockingModal(ImGuiWindow* window)
{
ImGuiContext& g = *GImGui;
if (g.OpenPopupStack.Size <= 0)
return NULL;
// Find a modal that has common parent with specified window. Specified window should be positioned behind that modal.
for (int i = g.OpenPopupStack.Size - 1; i >= 0; i--)
{
ImGuiWindow* popup_window = g.OpenPopupStack.Data[i].Window;
if (popup_window == NULL || !popup_window->WasActive || !(popup_window->Flags & ImGuiWindowFlags_Modal)) // Check WasActive, because this code may run before popup renders on current frame.
continue;
if (IsWindowWithinBeginStackOf(window, popup_window)) // Window is rendered over last modal, no render order change needed.
break;
for (ImGuiWindow* parent = popup_window->ParentWindowInBeginStack->RootWindow; parent != NULL; parent = parent->ParentWindowInBeginStack->RootWindow)
if (IsWindowWithinBeginStackOf(window, parent))
return popup_window; // Place window above its begin stack parent.
}
return NULL;
}
// Push a new Dear ImGui window to add widgets to.
// - A default window called "Debug" is automatically stacked at the beginning of every frame so you can use widgets without explicitly calling a Begin/End pair.
// - Begin/End can be called multiple times during the frame with the same window name to append content.
@ -6204,6 +6253,22 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
want_focus = true;
else if ((flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_Tooltip)) == 0)
want_focus = true;
ImGuiWindow* modal = GetTopMostPopupModal();
if (modal != NULL && !IsWindowWithinBeginStackOf(window, modal))
{
// Avoid focusing a window that is created outside of active modal. This will prevent active modal from being closed.
// Since window is not focused it would reappear at the same display position like the last time it was visible.
// In case of completely new windows it would go to the top (over current modal), but input to such window would still be blocked by modal.
// Position window behind a modal that is not a begin-parent of this window.
want_focus = false;
if (window == window->RootWindow)
{
ImGuiWindow* blocking_modal = FindBlockingModal(window);
IM_ASSERT(blocking_modal != NULL);
BringWindowToDisplayBehind(window, blocking_modal);
}
}
}
// Handle manual resize: Resize Grips, Borders, Gamepad
@ -6581,6 +6646,34 @@ void ImGui::BringWindowToDisplayBack(ImGuiWindow* window)
}
}
void ImGui::BringWindowToDisplayBehind(ImGuiWindow* window, ImGuiWindow* behind_window)
{
IM_ASSERT(window != NULL && behind_window != NULL);
ImGuiContext& g = *GImGui;
window = window->RootWindow;
behind_window = behind_window->RootWindow;
int pos_wnd = FindWindowDisplayIndex(window);
int pos_beh = FindWindowDisplayIndex(behind_window);
if (pos_wnd < pos_beh)
{
size_t copy_bytes = (pos_beh - pos_wnd - 1) * sizeof(ImGuiWindow*);
memmove(&g.Windows.Data[pos_wnd], &g.Windows.Data[pos_wnd + 1], copy_bytes);
g.Windows[pos_beh - 1] = window;
}
else
{
size_t copy_bytes = (pos_wnd - pos_beh) * sizeof(ImGuiWindow*);
memmove(&g.Windows.Data[pos_beh + 1], &g.Windows.Data[pos_beh], copy_bytes);
g.Windows[pos_beh] = window;
}
}
int ImGui::FindWindowDisplayIndex(ImGuiWindow* window)
{
ImGuiContext& g = *GImGui;
return g.Windows.index_from_ptr(g.Windows.find(window));
}
// Moving window to front of display and set focus (which happens to be back of our sorted list)
void ImGui::FocusWindow(ImGuiWindow* window)
{
@ -6810,6 +6903,19 @@ bool ImGui::IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent,
return false;
}
bool ImGui::IsWindowWithinBeginStackOf(ImGuiWindow* window, ImGuiWindow* potential_parent)
{
if (window->RootWindow == potential_parent)
return true;
while (window != NULL)
{
if (window == potential_parent)
return true;
window = window->ParentWindowInBeginStack;
}
return false;
}
bool ImGui::IsWindowAbove(ImGuiWindow* potential_above, ImGuiWindow* potential_below)
{
ImGuiContext& g = *GImGui;
@ -8492,7 +8598,7 @@ void ImGui::ClosePopupsOverWindow(ImGuiWindow* ref_window, bool restore_focus_to
bool ref_window_is_descendent_of_popup = false;
for (int n = popup_count_to_keep; n < g.OpenPopupStack.Size; n++)
if (ImGuiWindow* popup_window = g.OpenPopupStack[n].Window)
if (popup_window->RootWindow == ref_window->RootWindow)
if (IsWindowWithinBeginStackOf(ref_window, popup_window))
{
ref_window_is_descendent_of_popup = true;
break;