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IsWindowHovered: Added support for ImGuiHoveredFlags_Stationary.

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This commit is contained in:
ocornut
2023-06-19 13:41:52 +02:00
parent b60acfa87d
commit e7a4327eb8
5 changed files with 36 additions and 14 deletions
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32
imgui.cpp
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@ -3933,6 +3933,16 @@ bool ImGui::IsWindowContentHoverable(ImGuiWindow* window, ImGuiHoveredFlags flag
return true;
}
static inline float CalcDelayFromHoveredFlags(ImGuiHoveredFlags flags)
{
ImGuiContext& g = *GImGui;
if (flags & ImGuiHoveredFlags_DelayShort)
return g.Style.HoverDelayShort;
if (flags & ImGuiHoveredFlags_DelayNormal)
return g.Style.HoverDelayNormal;
return 0.0f;
}
// This is roughly matching the behavior of internal-facing ItemHoverable()
// - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered()
// - this should work even for non-interactive items that have no ID, so we cannot use LastItemId
@ -3995,13 +4005,7 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
// Handle hover delay
// (some ideas: https://www.nngroup.com/articles/timing-exposing-content)
float delay;
if (flags & ImGuiHoveredFlags_DelayShort)
delay = g.Style.HoverDelayShort;
else if (flags & ImGuiHoveredFlags_DelayNormal)
delay = g.Style.HoverDelayNormal;
else
delay = 0.0f;
const float delay = CalcDelayFromHoveredFlags(flags);
if (delay > 0.0f || (flags & ImGuiHoveredFlags_Stationary))
{
ImGuiID hover_delay_id = (g.LastItemData.ID != 0) ? g.LastItemData.ID : window->GetIDFromRectangle(g.LastItemData.Rect);
@ -4567,6 +4571,10 @@ void ImGui::NewFrame()
g.HoverItemUnlockedStationaryId = g.HoverItemDelayId;
else if (g.HoverItemDelayId == 0)
g.HoverItemUnlockedStationaryId = 0;
if (g.HoveredWindow != NULL && g.MouseStationaryTimer >= g.Style.HoverStationaryDelay)
g.HoverWindowUnlockedStationaryId = g.HoveredWindow->ID;
else if (g.HoveredWindow == NULL)
g.HoverWindowUnlockedStationaryId = 0;
// Update hover delay for IsItemHovered() with delays and tooltips
g.HoverItemDelayIdPreviousFrame = g.HoverItemDelayId;
@ -7274,6 +7282,16 @@ bool ImGui::IsWindowHovered(ImGuiHoveredFlags flags)
if (g.ActiveId != 0 && !g.ActiveIdAllowOverlap && g.ActiveId != ref_window->MoveId)
return false;
// When changing hovered window we requires a bit of stationary delay before activating hover timer.
// FIXME: We don't support delay other than stationary one for now, other delay would need a way
// to fullfill the possibility that multiple IsWindowHovered() with varying flag could return true
// for different windows of the hierarchy. Possibly need a Hash(Current+Flags) ==> (Timer) cache.
// We can implement this for _Stationary because the data is linked to HoveredWindow rather than CurrentWindow.
if (flags & ImGuiHoveredFlags_ForTooltip)
flags |= g.Style.HoverFlagsForTooltipMouse;
if ((flags & ImGuiHoveredFlags_Stationary) != 0 && g.HoverWindowUnlockedStationaryId != ref_window->ID)
return false;
return true;
}