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Nav: Added experiment ImGuiWindowFlags_NavFlattened flag to cross over between parent and non-scrolling child windows (#323)

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This commit is contained in:
ocornut
2016-07-31 12:55:23 +02:00
parent 769a1dd748
commit b3cba62b80
4 changed files with 28 additions and 20 deletions
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38
imgui.cpp
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@ -1755,9 +1755,10 @@ ImGuiWindow::ImGuiWindow(const char* name)
DrawList = (ImDrawList*)ImGui::MemAlloc(sizeof(ImDrawList));
IM_PLACEMENT_NEW(DrawList) ImDrawList();
DrawList->_OwnerName = Name;
ParentWindow = NULL;
RootWindow = NULL;
RootNonPopupWindow = NULL;
ParentWindow = NULL;
RootNavWindow = NULL;
FocusIdxAllCounter = FocusIdxTabCounter = -1;
FocusIdxAllRequestCurrent = FocusIdxTabRequestCurrent = INT_MAX;
@ -1917,7 +1918,7 @@ static float NavScoreItemDistInterval(float a0, float a1, float b0, float b1)
static bool NavScoreItem(ImRect cand)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImGuiWindow* window = g.NavWindow;
if (g.NavLayer != window->DC.NavLayerCurrent)
return false;
@ -2059,10 +2060,10 @@ bool ImGui::ItemAdd(const ImRect& bb, const ImGuiID* id, const ImRect* nav_bb_ar
// We could early out with `if (is_clipped && !g.NavInitDefaultRequest) return false;` but when we wouldn't be able to reach unclipped widgets. This would work if user had explicit scrolling control (e.g. mapped on a stick)
// A more pragmatic solution for handling last lists is relying on the fact that they are likely evenly spread items (so that clipper can work) and we could nav at higher-level (apply index, etc.)
// So eventually we would like to provide the user will the primitives to be able to implement that sort of customized/efficient navigation handling whenever necessary.
if (id != NULL && g.NavWindow == window && g.IO.NavUsable)
if (id != NULL && g.NavWindow == window->RootNavWindow && g.IO.NavUsable)
{
const ImRect& nav_bb = nav_bb_arg ? *nav_bb_arg : bb;
const ImRect nav_bb_rel(nav_bb.Min - window->Pos, nav_bb.Max - window->Pos);
const ImRect nav_bb_rel(nav_bb.Min - g.NavWindow->Pos, nav_bb.Max - g.NavWindow->Pos);
if (g.NavInitDefaultRequest && g.NavLayer == window->DC.NavLayerCurrent && window->DC.AllowNavDefaultFocus)
{
g.NavInitDefaultRequest = g.NavInitDefaultResultExplicit = false; // Clear flag immediately, first item gets default, also simplify the if() in ItemAdd()
@ -2070,8 +2071,8 @@ bool ImGui::ItemAdd(const ImRect& bb, const ImGuiID* id, const ImRect* nav_bb_ar
g.NavInitDefaultResultRectRel = nav_bb_rel;
}
const bool DEBUG_NAV = false; // [DEBUG] Enable to test scoring on all items.
if ((g.NavMoveRequest || DEBUG_NAV) && g.NavId != *id)
//const bool DEBUG_NAV = false; // [DEBUG] Enable to test scoring on all items.
if ((g.NavMoveRequest /*|| DEBUG_NAV*/) && g.NavId != *id)
{
//if (DEBUG_NAV && !g.NavMoveRequest) g.NavMoveDir = ImGuiNavDir_N;
if (NavScoreItem(nav_bb)) //if (!DEBUG || g.NavMoveRequest)
@ -2389,7 +2390,7 @@ static void NavUpdate()
}
}
// Apply result from previous navigation directional move request
// Apply result from previous frame navigation directional move request
ImGui::SetActiveID(0);
SetNavIdMoveMouse(g.NavMoveResultId, g.NavMoveResultRectRel);
g.NavMoveFromClampedRefRect = false;
@ -3864,7 +3865,7 @@ void ImGui::SetItemAllowOverlap()
void ImGui::SetItemDefaultFocus()
{
ImGuiContext& g = *GImGui;
if (g.NavWindow == g.CurrentWindow && (g.NavInitDefaultRequest || g.NavInitDefaultResultId != 0))
if (g.NavWindow == g.CurrentWindow->RootNavWindow && (g.NavInitDefaultRequest || g.NavInitDefaultResultId != 0))
{
g.NavInitDefaultRequest = false;
g.NavInitDefaultResultExplicit = true;
@ -4186,7 +4187,7 @@ bool ImGui::BeginChild(const char* str_id, const ImVec2& size_arg, bool border,
// Process navigation-in immediately so NavInit can run on first frame
const ImGuiID id = parent_window->GetChildID(child_window);
if ((child_window->DC.NavLayerActiveFlags != 0 || child_window->DC.NavHasScroll) && GImGui->NavActivateId == id)
if (!(flags & ImGuiWindowFlags_NavFlattened) && (child_window->DC.NavLayerActiveFlags != 0 || child_window->DC.NavHasScroll) && GImGui->NavActivateId == id)
{
FocusWindow(child_window);
NavInitWindow(child_window, false);
@ -4227,16 +4228,15 @@ void ImGui::EndChild()
ImGuiID id = parent_window->GetChildID(window);
ImRect bb(parent_window->DC.CursorPos, parent_window->DC.CursorPos + sz);
ItemSize(sz);
ItemAdd(bb, (window->DC.NavLayerActiveFlags != 0 || window->DC.NavHasScroll) ? &id : NULL);
if (window->DC.NavLayerActiveFlags != 0 || window->DC.NavHasScroll)
if (!(window->Flags & ImGuiWindowFlags_NavFlattened) && (window->DC.NavLayerActiveFlags != 0 || window->DC.NavHasScroll))
{
//if (!window->DC.NavHasItems && window->DC.NavHasScroll && g.NavWindow == window) // As a special case, we render nav highlight of child when inside when only scrolling is possible
//{
// bb.Expand(-1.0f);
// id = g.NavId;
//}
ItemAdd(bb, &id);
RenderNavHighlight(id, bb);
}
else
{
ItemAdd(bb, NULL);
}
}
}
@ -4428,6 +4428,9 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
if (flags & ImGuiWindowFlags_NoInputs)
flags |= ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize;
if (flags & ImGuiWindowFlags_NavFlattened)
IM_ASSERT(flags & ImGuiWindowFlags_ChildWindow);
// Find or create
bool window_is_new = false;
ImGuiWindow* window = FindWindowByName(name);
@ -4524,6 +4527,9 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
window->ParentWindow = parent_window;
window->RootWindow = g.CurrentWindowStack[root_idx];
window->RootNonPopupWindow = g.CurrentWindowStack[root_non_popup_idx]; // Used to display TitleBgActive color and for selecting which window to use for NavWindowing
window->RootNavWindow = window;
while (window->RootNavWindow->Flags & ImGuiWindowFlags_NavFlattened)
window->RootNavWindow = window->RootNavWindow->ParentWindow;
// When reusing window again multiple times a frame, just append content (don't need to setup again)
if (first_begin_of_the_frame)