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Nav: simplify wrap requests code (may soon be useable for tabbing)

This commit is contained in:
ocornut 2021-08-27 12:31:11 +02:00
parent 4c31c98d22
commit 84890a3074
2 changed files with 14 additions and 19 deletions
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25
imgui.cpp
View File

@ -8437,7 +8437,7 @@ void ImGui::EndPopup()
IM_ASSERT(window->Flags & ImGuiWindowFlags_Popup); // Mismatched BeginPopup()/EndPopup() calls
IM_ASSERT(g.BeginPopupStack.Size > 0);
// Make all menus and popups wrap around for now, may need to expose that policy.
// Make all menus and popups wrap around for now, may need to expose that policy (e.g. focus scope could include wrap/loop policy flags used by new move requests)
if (g.NavWindow == window)
NavMoveRequestTryWrapping(window, ImGuiNavMoveFlags_LoopY);
@ -8952,14 +8952,14 @@ void ImGui::NavMoveRequestForward(ImGuiDir move_dir, ImGuiDir clip_dir, const Im
g.NavWindow->NavRectRel[g.NavLayer] = bb_rel;
}
void ImGui::NavMoveRequestTryWrapping(ImGuiWindow* window, ImGuiNavMoveFlags move_flags)
// Navigation wrap-around logic is delayed to the end of the frame because this operation is only valid after entire
// popup is assembled and in case of appended popups it is not clear which EndPopup() call is final.
void ImGui::NavMoveRequestTryWrapping(ImGuiWindow* window, ImGuiNavMoveFlags wrap_flags)
{
ImGuiContext& g = *GImGui;
// Navigation wrap-around logic is delayed to the end of the frame because this operation is only valid after entire
// popup is assembled and in case of appended popups it is not clear which EndPopup() call is final.
g.NavWrapRequestWindow = window;
g.NavWrapRequestFlags = move_flags;
IM_ASSERT(wrap_flags != 0); // Call with _WrapX, _WrapY, _LoopX, _LoopY
if (g.NavWindow == window && g.NavMoveRequest && g.NavLayer == ImGuiNavLayer_Main)
g.NavMoveRequestFlags |= wrap_flags;
}
// FIXME: This could be replaced by updating a frame number in each window when (window == NavWindow) and (NavLayer == 0).
@ -9105,8 +9105,6 @@ static void ImGui::NavUpdate()
ImGuiIO& io = g.IO;
io.WantSetMousePos = false;
g.NavWrapRequestWindow = NULL;
g.NavWrapRequestFlags = ImGuiNavMoveFlags_None;
#if 0
if (g.NavScoringCount > 0) IMGUI_DEBUG_LOG("NavScoringCount %d for '%s' layer %d (Init:%d, Move:%d)\n", g.FrameCount, g.NavScoringCount, g.NavWindow ? g.NavWindow->Name : "NULL", g.NavLayer, g.NavInitRequest || g.NavInitResultId != 0, g.NavMoveRequest);
#endif
@ -9546,11 +9544,12 @@ static void ImGui::NavEndFrame()
NavUpdateWindowingOverlay();
// Perform wrap-around in menus
ImGuiWindow* window = g.NavWrapRequestWindow;
ImGuiNavMoveFlags move_flags = g.NavWrapRequestFlags;
if (window != NULL && g.NavWindow == window && NavMoveRequestButNoResultYet() && g.NavMoveRequestForward == ImGuiNavForward_None && g.NavLayer == ImGuiNavLayer_Main)
// FIXME-NAV: Wrap support could be moved to the scoring function and than WrapX would function without an extra frame. This is essentially same as tabbing!
ImGuiWindow* window = g.NavWindow;
const ImGuiNavMoveFlags move_flags = g.NavMoveRequestFlags;
const ImGuiNavMoveFlags wanted_flags = ImGuiNavMoveFlags_WrapX | ImGuiNavMoveFlags_LoopX | ImGuiNavMoveFlags_WrapY | ImGuiNavMoveFlags_LoopY;
if (window && NavMoveRequestButNoResultYet() && (g.NavMoveRequestFlags & wanted_flags) && g.NavMoveRequestForward == ImGuiNavForward_None)
{
IM_ASSERT(move_flags != 0); // No points calling this with no wrapping
ImRect bb_rel = window->NavRectRel[0];
ImGuiDir clip_dir = g.NavMoveDir;

8
imgui_internal.h
View File

@ -938,9 +938,9 @@ enum ImGuiNavMoveFlags_
ImGuiNavMoveFlags_LoopX = 1 << 0, // On failed request, restart from opposite side
ImGuiNavMoveFlags_LoopY = 1 << 1,
ImGuiNavMoveFlags_WrapX = 1 << 2, // On failed request, request from opposite side one line down (when NavDir==right) or one line up (when NavDir==left)
ImGuiNavMoveFlags_WrapY = 1 << 3, // This is not super useful for provided for completeness
ImGuiNavMoveFlags_WrapY = 1 << 3, // This is not super useful but provided for completeness
ImGuiNavMoveFlags_AllowCurrentNavId = 1 << 4, // Allow scoring and considering the current NavId as a move target candidate. This is used when the move source is offset (e.g. pressing PageDown actually needs to send a Up move request, if we are pressing PageDown from the bottom-most item we need to stay in place)
ImGuiNavMoveFlags_AlsoScoreVisibleSet = 1 << 5, // Store alternate result in NavMoveResultLocalVisibleSet that only comprise elements that are already fully visible.
ImGuiNavMoveFlags_AlsoScoreVisibleSet = 1 << 5, // Store alternate result in NavMoveResultLocalVisibleSet that only comprise elements that are already fully visible (used by PageUp/PageDown)
ImGuiNavMoveFlags_ScrollToEdge = 1 << 6
};
@ -1534,8 +1534,6 @@ struct ImGuiContext
ImGuiNavItemData NavMoveResultLocal; // Best move request candidate within NavWindow
ImGuiNavItemData NavMoveResultLocalVisibleSet; // Best move request candidate within NavWindow that are mostly visible (when using ImGuiNavMoveFlags_AlsoScoreVisibleSet flag)
ImGuiNavItemData NavMoveResultOther; // Best move request candidate within NavWindow's flattened hierarchy (when using ImGuiWindowFlags_NavFlattened flag)
ImGuiWindow* NavWrapRequestWindow; // Window which requested trying nav wrap-around.
ImGuiNavMoveFlags NavWrapRequestFlags; // Wrap-around operation flags.
// Navigation: Windowing (CTRL+TAB for list, or Menu button + keys or directional pads to move/resize)
ImGuiWindow* NavWindowingTarget; // Target window when doing CTRL+Tab (or Pad Menu + FocusPrev/Next), this window is temporarily displayed top-most!
@ -1734,8 +1732,6 @@ struct ImGuiContext
NavMoveRequestForward = ImGuiNavForward_None;
NavMoveRequestKeyMods = ImGuiKeyModFlags_None;
NavMoveDir = NavMoveDirLast = NavMoveClipDir = ImGuiDir_None;
NavWrapRequestWindow = NULL;
NavWrapRequestFlags = ImGuiNavMoveFlags_None;
NavWindowingTarget = NavWindowingTargetAnim = NavWindowingListWindow = NULL;
NavWindowingTimer = NavWindowingHighlightAlpha = 0.0f;