Nav: Made CTRL+TAB skip menus + skip the current navigation window if is has the ImGuiWindow_NoNavFocus set. (#787) ...

While it was previously possible, you won't be able to CTRL-TAB out and immediately back in a window with the ImGuiWindow_NoNavFocus flag.

Use literals in place of LLONG_MIN, LLONG_MAX ULLONG_MAX if they are not available. Amend 498c0dc. We prefer using the defines if available in limits.h because they somehow tend to work without warnings when enabling strict C++03 compilation. The 3 literals are fallbacks.. (#1926).

Internals: Minor renaming for consistency.

Metrics: Changed io.MetricsActiveWindows to reflect the number of active windows (!= from visible windows), which is useful for lazy/idle render mechanisms as new windows are typically not visible for one frame. ...

Metrics: Added io.MetricsRenderWindow to reflect the number of visible windows.

Using limits.h LLONG_MIN etc. to increase old-compiler compatibility (as ll and ull prefixes were not standard). Not tested much on old compilers, relying on Clang/GCC warnings.

Merge branch 'master' into viewport ...

# Conflicts:
#	examples/imgui_impl_dx11.cpp
#	examples/imgui_impl_glfw.cpp
#	examples/imgui_impl_sdl.cpp
#	imgui.cpp

Renamed io.OptResizeWindowsFromEdges to ConfigResizeWindowsFromEdges, io.OptCursorBlink to io.ConfigCursorBlink, io.OptMacOSXBehaviors to ConfigMacOSXBehaviors for consistency. (#1427, #1495, #822, #473, #650) ...

Demo: Exposed flags in Demo.

Fixed PushID() from keeping alive the new ID Stack top value (if a previously active widget shared the ID it would be erroneously kept alive) (drag and drop demo could soft-lock the UI until pressing Escape!)

Drag and Drop: Elapse payload as soon as delivery is made. (#153)

Viewport: Fixed an assert on loss of valid mouse position while dragging a tooltip (would happen often when using debugger breakpoint). Not totally sure about best solution, may not be important.

Drag and Drop: Added ImGuiDragDropFlags_SourceAutoExpirePayload flag to force payload to expire if the source stops being submitted. (#1725, #143).

Drag and Drop: Clear payload buffers more consistently in ClearDragAndDrop() + BeginDragDropTargetCustom() can't succeed with hidden contents. (#143)

Merge branch 'master' into viewport ...

# Conflicts:
#	examples/imgui_impl_opengl3.cpp
#	imgui.cpp

Drag and Drop: Payload stays available and under the mouse if the source stops being submitted, however the tooltip is replaced by "..." + moved FrameScopeActive = false at the bottom of EndFrame() for safety. (#1725)

InvisibleButton: Added an assert to catch common type of passing zero-sized dimensions. (#1983)

Made assertion more clear when trying to call Begin() outside of the NewFrame()..EndFrame() scope. (#1987)

Internals: Changed signature of ShadeVerts functions to remove pointers. (#1286, #1700, #1986)

Revert "Assert that fmt != NULL before calling vsnprintf (#1969)" ...

This reverts commit 84183f5.

Speculative va_copy() fix for old versions of GCC/Clang. (cannot repro) (#1085)

Visual Studio: calling into _vsnprintf. (#1085)

Internals: Fixed HoveredIdTimer so it is safe to call SetHoveredId() multiple times without altering the timer.

CollapseButton: Added hovering highlight + minor consistency tweaks.

Internals: Drag and Drop: default drop preview use a narrower clipping rectangle (no effect here, but other branches uses a narrow clipping rectangle that was too small so this is a fix for it) + Comments

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp
#	imgui_internal.h

Internals: Changed SplitterBehavior() signature to be consistent with other similar signatures. (#319).

Internals: Extracted part of Begin into UpdateWindowParentAndRootLinks(). Useful to call to keep state updated immediately (namely useful for docking) + small tidying up of imgui_internal.h

Assert that fmt != NULL before calling vsnprintf (#1969) ...

In the case of Visual Studio 15.6 + Windows SDK 10.0, vsnprintf() with NULL format string appears to corrupt the stack...

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp

Internals: Child windows that are clipped or part of a collapsed parent are not marked as collapsed anymore, but just a separate hidden marker set. We distinguish hiding for size measurement vs hiding for other reasons. Cleaned a little the end of Begin.

Nav: Tweaked CTRL+TAB to hide visual noise on fast switch + fading out screen dimming and highlight to make the experience less harsh