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Nav: small refactor of forwarding, clarified that MoveDir only set when RequestActive, removed one indent level in NavUpdatePageUpPageDown().

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ocornut
2021-08-27 20:48:01 +02:00
parent 4351febe9f
commit ccfb20095e
3 changed files with 77 additions and 83 deletions
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134
imgui.cpp
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@ -8943,12 +8943,12 @@ void ImGui::NavMoveRequestCancel()
void ImGui::NavMoveRequestForward(ImGuiDir move_dir, ImGuiDir clip_dir, ImGuiNavMoveFlags move_flags)
{
ImGuiContext& g = *GImGui;
IM_ASSERT(g.NavMoveRequestForward == ImGuiNavForward_None);
IM_ASSERT(g.NavMoveRequestForwardToNextFrame == false);
NavMoveRequestCancel();
g.NavMoveRequestForwardToNextFrame = true;
g.NavMoveDir = move_dir;
g.NavMoveClipDir = clip_dir;
g.NavMoveRequestForward = ImGuiNavForward_ForwardQueued;
g.NavMoveRequestFlags = move_flags;
g.NavMoveRequestFlags = move_flags | ImGuiNavMoveFlags_Forwarded;
}
// Navigation wrap-around logic is delayed to the end of the frame because this operation is only valid after entire
@ -9151,6 +9151,7 @@ static void ImGui::NavUpdate()
// Process navigation move request
if (g.NavMoveRequest)
NavMoveRequestApplyResult();
g.NavMoveRequest = false;
// Apply application mouse position movement, after we had a chance to process move request result.
if (g.NavMousePosDirty && g.NavIdIsAlive)
@ -9203,16 +9204,24 @@ static void ImGui::NavUpdate()
g.NavDisableHighlight = true;
if (g.NavActivateId != 0)
IM_ASSERT(g.NavActivateDownId == g.NavActivateId);
g.NavMoveRequest = false;
// Process programmatic activation request
if (g.NavNextActivateId != 0)
g.NavActivateId = g.NavActivateDownId = g.NavActivatePressedId = g.NavInputId = g.NavNextActivateId;
g.NavNextActivateId = 0;
// Initiate directional inputs request
if (g.NavMoveRequestForward == ImGuiNavForward_None)
if (g.NavMoveRequestForwardToNextFrame)
{
// Forwarding previous request (which has been modified, e.g. wrap around menus rewrite the requests with a starting rectangle at the other side of the window)
// (Preserve g.NavMoveRequestFlags, g.NavMoveClipDir which were set by the NavMoveRequestForward() function)
IM_ASSERT(g.NavMoveDir != ImGuiDir_None && g.NavMoveClipDir != ImGuiDir_None);
IM_ASSERT(g.NavMoveRequestFlags & ImGuiNavMoveFlags_Forwarded);
IMGUI_DEBUG_LOG_NAV("[nav] NavMoveRequestForward %d\n", g.NavMoveDir);
g.NavMoveRequestForwardToNextFrame = false;
}
else
{
// Initiate directional inputs request
g.NavMoveDir = ImGuiDir_None;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_None;
if (g.NavWindow && !g.NavWindowingTarget && !(g.NavWindow->Flags & ImGuiWindowFlags_NoNavInputs))
@ -9225,14 +9234,6 @@ static void ImGui::NavUpdate()
}
g.NavMoveClipDir = g.NavMoveDir;
}
else if (g.NavMoveRequestForward == ImGuiNavForward_ForwardQueued)
{
// Forwarding previous request (which has been modified, e.g. wrap around menus rewrite the requests with a starting rectangle at the other side of the window)
// (Preserve g.NavMoveRequestFlags, g.NavMoveClipDir which were set by the NavMoveRequestForward() function)
IM_ASSERT(g.NavMoveDir != ImGuiDir_None && g.NavMoveClipDir != ImGuiDir_None);
IMGUI_DEBUG_LOG_NAV("[nav] NavMoveRequestForward %d\n", g.NavMoveDir);
g.NavMoveRequestForward = ImGuiNavForward_ForwardActive;
}
// Update PageUp/PageDown/Home/End scroll
// FIXME-NAV: Consider enabling those keys even without the master ImGuiConfigFlags_NavEnableKeyboard flag?
@ -9256,6 +9257,8 @@ static void ImGui::NavUpdate()
g.NavDisableHighlight = false;
}
NavUpdateAnyRequestFlag();
if (g.NavMoveDir != ImGuiDir_None)
IM_ASSERT(g.NavMoveRequest);
// Scrolling
if (g.NavWindow && !(g.NavWindow->Flags & ImGuiWindowFlags_NoNavInputs) && !g.NavWindowingTarget)
@ -9344,9 +9347,6 @@ void ImGui::NavMoveRequestApplyResult()
{
ImGuiContext& g = *GImGui;
if (g.NavMoveRequestForward == ImGuiNavForward_ForwardActive)
g.NavMoveRequestForward = ImGuiNavForward_None;
if (g.NavMoveResultLocal.ID == 0 && g.NavMoveResultOther.ID == 0)
{
// In a situation when there is no results but NavId != 0, re-enable the Navigation highlight (because g.NavId is not considered as a possible result)
@ -9471,60 +9471,60 @@ static float ImGui::NavUpdatePageUpPageDown()
const bool page_down_held = IsKeyDown(io.KeyMap[ImGuiKey_PageDown]) && !IsActiveIdUsingKey(ImGuiKey_PageDown);
const bool home_pressed = IsKeyPressed(io.KeyMap[ImGuiKey_Home]) && !IsActiveIdUsingKey(ImGuiKey_Home);
const bool end_pressed = IsKeyPressed(io.KeyMap[ImGuiKey_End]) && !IsActiveIdUsingKey(ImGuiKey_End);
if (page_up_held != page_down_held || home_pressed != end_pressed) // If either (not both) are pressed
if (page_up_held == page_down_held && home_pressed == end_pressed) // Proceed if either (not both) are pressed, otherwise early out
return 0.0f;
if (window->DC.NavLayersActiveMask == 0x00 && window->DC.NavHasScroll)
{
if (window->DC.NavLayersActiveMask == 0x00 && window->DC.NavHasScroll)
// Fallback manual-scroll when window has no navigable item
if (IsKeyPressed(io.KeyMap[ImGuiKey_PageUp], true))
SetScrollY(window, window->Scroll.y - window->InnerRect.GetHeight());
else if (IsKeyPressed(io.KeyMap[ImGuiKey_PageDown], true))
SetScrollY(window, window->Scroll.y + window->InnerRect.GetHeight());
else if (home_pressed)
SetScrollY(window, 0.0f);
else if (end_pressed)
SetScrollY(window, window->ScrollMax.y);
}
else
{
ImRect& nav_rect_rel = window->NavRectRel[g.NavLayer];
const float page_offset_y = ImMax(0.0f, window->InnerRect.GetHeight() - window->CalcFontSize() * 1.0f + nav_rect_rel.GetHeight());
float nav_scoring_rect_offset_y = 0.0f;
if (IsKeyPressed(io.KeyMap[ImGuiKey_PageUp], true))
{
// Fallback manual-scroll when window has no navigable item
if (IsKeyPressed(io.KeyMap[ImGuiKey_PageUp], true))
SetScrollY(window, window->Scroll.y - window->InnerRect.GetHeight());
else if (IsKeyPressed(io.KeyMap[ImGuiKey_PageDown], true))
SetScrollY(window, window->Scroll.y + window->InnerRect.GetHeight());
else if (home_pressed)
SetScrollY(window, 0.0f);
else if (end_pressed)
SetScrollY(window, window->ScrollMax.y);
nav_scoring_rect_offset_y = -page_offset_y;
g.NavMoveDir = ImGuiDir_Down; // Because our scoring rect is offset up, we request the down direction (so we can always land on the last item)
g.NavMoveClipDir = ImGuiDir_Up;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_AlsoScoreVisibleSet;
}
else
else if (IsKeyPressed(io.KeyMap[ImGuiKey_PageDown], true))
{
ImRect& nav_rect_rel = window->NavRectRel[g.NavLayer];
const float page_offset_y = ImMax(0.0f, window->InnerRect.GetHeight() - window->CalcFontSize() * 1.0f + nav_rect_rel.GetHeight());
float nav_scoring_rect_offset_y = 0.0f;
if (IsKeyPressed(io.KeyMap[ImGuiKey_PageUp], true))
{
nav_scoring_rect_offset_y = -page_offset_y;
g.NavMoveDir = ImGuiDir_Down; // Because our scoring rect is offset up, we request the down direction (so we can always land on the last item)
g.NavMoveClipDir = ImGuiDir_Up;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_AlsoScoreVisibleSet;
}
else if (IsKeyPressed(io.KeyMap[ImGuiKey_PageDown], true))
{
nav_scoring_rect_offset_y = +page_offset_y;
g.NavMoveDir = ImGuiDir_Up; // Because our scoring rect is offset down, we request the up direction (so we can always land on the last item)
g.NavMoveClipDir = ImGuiDir_Down;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_AlsoScoreVisibleSet;
}
else if (home_pressed)
{
// FIXME-NAV: handling of Home/End is assuming that the top/bottom most item will be visible with Scroll.y == 0/ScrollMax.y
// Scrolling will be handled via the ImGuiNavMoveFlags_ScrollToEdge flag, we don't scroll immediately to avoid scrolling happening before nav result.
// Preserve current horizontal position if we have any.
nav_rect_rel.Min.y = nav_rect_rel.Max.y = -window->Scroll.y;
if (nav_rect_rel.IsInverted())
nav_rect_rel.Min.x = nav_rect_rel.Max.x = 0.0f;
g.NavMoveDir = ImGuiDir_Down;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_ScrollToEdge;
}
else if (end_pressed)
{
nav_rect_rel.Min.y = nav_rect_rel.Max.y = window->ScrollMax.y + window->SizeFull.y - window->Scroll.y;
if (nav_rect_rel.IsInverted())
nav_rect_rel.Min.x = nav_rect_rel.Max.x = 0.0f;
g.NavMoveDir = ImGuiDir_Up;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_ScrollToEdge;
}
return nav_scoring_rect_offset_y;
nav_scoring_rect_offset_y = +page_offset_y;
g.NavMoveDir = ImGuiDir_Up; // Because our scoring rect is offset down, we request the up direction (so we can always land on the last item)
g.NavMoveClipDir = ImGuiDir_Down;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_AlsoScoreVisibleSet;
}
else if (home_pressed)
{
// FIXME-NAV: handling of Home/End is assuming that the top/bottom most item will be visible with Scroll.y == 0/ScrollMax.y
// Scrolling will be handled via the ImGuiNavMoveFlags_ScrollToEdge flag, we don't scroll immediately to avoid scrolling happening before nav result.
// Preserve current horizontal position if we have any.
nav_rect_rel.Min.y = nav_rect_rel.Max.y = -window->Scroll.y;
if (nav_rect_rel.IsInverted())
nav_rect_rel.Min.x = nav_rect_rel.Max.x = 0.0f;
g.NavMoveDir = ImGuiDir_Down;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_ScrollToEdge;
}
else if (end_pressed)
{
nav_rect_rel.Min.y = nav_rect_rel.Max.y = window->ScrollMax.y + window->SizeFull.y - window->Scroll.y;
if (nav_rect_rel.IsInverted())
nav_rect_rel.Min.x = nav_rect_rel.Max.x = 0.0f;
g.NavMoveDir = ImGuiDir_Up;
g.NavMoveRequestFlags = ImGuiNavMoveFlags_AllowCurrentNavId | ImGuiNavMoveFlags_ScrollToEdge;
}
return nav_scoring_rect_offset_y;
}
return 0.0f;
}
@ -9542,7 +9542,7 @@ static void ImGui::NavEndFrame()
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)
if (window && NavMoveRequestButNoResultYet() && (g.NavMoveRequestFlags & wanted_flags) && (g.NavMoveRequestFlags & ImGuiNavMoveFlags_Forwarded) == 0)
{
bool do_forward = false;
ImRect bb_rel = window->NavRectRel[g.NavLayer];