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Inputs: added routing priorities. (#456, #2637, #3724)

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- and ImGuiInputFlags_RouteUnlessBgFocused
- will be useful for blind menu handlers.
This commit is contained in:
ocornut
2022-10-19 18:53:53 +02:00
parent 7ff2d3353c
commit 4d6a9ef93f
3 changed files with 51 additions and 21 deletions
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50
imgui.cpp
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@ -8052,11 +8052,24 @@ ImGuiKeyRoutingData* ImGui::GetShortcutRoutingData(ImGuiKeyChord key_chord)
bool ImGui::SetShortcutRouting(ImGuiKeyChord key_chord, ImGuiID owner_id, ImGuiInputFlags flags, ImGuiWindow* location)
{
ImGuiContext& g = *GImGui;
if ((flags & ImGuiInputFlags_RouteMask_) == 0)
flags = ImGuiInputFlags_RouteGlobalHigh; // This is the default for SetShortcutRouting() but NOT Shortcut() which doesn't touch routing by default!
else
IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiInputFlags_RouteMask_)); // Check that only 1 routing flag is used
IM_ASSERT(owner_id != ImGuiKeyOwner_None);
// Calculate our score
if (flags & ImGuiInputFlags_RouteUnlessBgFocused)
if (g.NavWindow == NULL)
return false;
// Current score encoding (lower is highest priority):
// - 0: ImGuiInputFlags_RouteGlobalHigh
// - 1: ImGuiInputFlags_RouteFocused (if item active)
// - 2: ImGuiInputFlags_RouteGlobal
// - 3+: ImGuiInputFlags_RouteFocused (if window in focus-stack)
// - 254: ImGuiInputFlags_RouteGlobalLow
// - 255: none
int score = 255;
bool always_set_next_route = false;
if (flags & ImGuiInputFlags_RouteFocused)
{
if (location == NULL)
@ -8065,44 +8078,48 @@ bool ImGui::SetShortcutRouting(ImGuiKeyChord key_chord, ImGuiID owner_id, ImGuiI
if (g.ActiveId != 0 && g.ActiveId == owner_id)
{
// ActiveID gets top priority (0)
// ActiveID gets top priority
// (we don't check g.ActiveIdUsingAllKeys here. Routing is applied but if input ownership is tested later it may discard it)
score = 0;
score = 1;
}
else if (focused != NULL && focused->RootWindow == location->RootWindow) // Early out
{
// Score based on distance to focused window (lower is better)
// Assuming both windows are submitting a routing request,
// - When WindowA...... is focused -> WindowA scores 1 (best), WindowA/ChildB scores 255 (no match)
// - When Window/ChildB is focused -> WindowA scores 2, WindowA/ChildB scores 1 (best)
// - When Window....... is focused -> Window scores 3 (best), Window/ChildB scores 255 (no match)
// - When Window/ChildB is focused -> Window scores 4, Window/ChildB scores 3 (best)
// Assuming only WindowA is submitting a routing request,
// - When Window/ChildB is focused -> WindowA scores 2 (best), WindowA/ChildB doesn't have a scoe.
for (int next_score = 1; focused != NULL; next_score++)
// - When Window/ChildB is focused -> Window scores 4 (best), Window/ChildB doesn't have a score.
for (int next_score = 3; focused != NULL; next_score++)
{
if (focused == location)
{
IM_ASSERT(next_score < 255);
score = (ImU8)next_score;
break;
}
focused = (focused->RootWindow != focused) ? focused->ParentWindow : NULL; // FIXME: This could be later abstracted as a focus path
}
}
if (score == 255)
return false;
}
else
{
score = 0;
always_set_next_route = true;
if (flags & ImGuiInputFlags_RouteGlobal)
score = 2;
else if (flags & ImGuiInputFlags_RouteGlobalLow)
score = 254;
else // ImGuiInputFlags_RouteGlobalHigh is default, so call to SetShorcutRouting() without no flags are not conditional
score = 0;
}
if (score == 255)
return false;
// Submit routing for NEXT frame (assuming score is sufficient)
// FIXME: Could expose a way to use a "serve last" policy for same score resolution (using <= instead of <).
ImGuiKeyRoutingData* routing_data = GetShortcutRoutingData(key_chord);
const ImGuiID routing_id = GetRoutingIdFromOwnerId(owner_id); // FIXME: Location
//const bool set_route = (flags & ImGuiInputFlags_ServeLast) ? (score <= routing_data->RoutingNextScore) : (score < routing_data->RoutingNextScore);
if (score < routing_data->RoutingNextScore || always_set_next_route)
if (score < routing_data->RoutingNextScore)
{
routing_data->RoutingNext = routing_id;
routing_data->RoutingNextScore = (ImU8)score;
@ -8598,8 +8615,9 @@ bool ImGui::Shortcut(ImGuiKeyChord key_chord, ImGuiID owner_id, ImGuiInputFlags
{
ImGuiContext& g = *GImGui;
if (flags & ImGuiInputFlags_RouteFocused)
if (!SetShortcutRouting(key_chord, owner_id, ImGuiInputFlags_RouteFocused, g.CurrentWindow))
// When using (owner_id == 0/Any): SetShortcutRouting() will use CurrentFocusScopeId and filter with this, so IsKeyPressed() is fine with he 0/Any.
if (flags & (ImGuiInputFlags_RouteMask_ | ImGuiInputFlags_RouteUnlessBgFocused))
if (!SetShortcutRouting(key_chord, owner_id, flags, g.CurrentWindow))
return false;
ImGuiKey key = (ImGuiKey)(key_chord & ~ImGuiMod_Mask_);