Added IsItemEdited() to query if the last item modified its value (or was pressed). This is equivalent to the bool returned by most widgets. It is useful in some situation e.g. using InputText() with ImGuiInputTextFlags_EnterReturnsTrue. (#2034)

Rearrange header comments to find enums easily + fixed inconsistent sorting.

Added optional misc/stl/imgui_stl.h wrapper to use with STL types (e.g. InputText with std::string). (#2035, #2006, #1443, #1008)

InputText: callback InsertChars() support resize callbacks correctly (followup to 24ff259) + fixed demo to use those functions. (#2006, #1443, #1008).

Internals: InputText: Renaming. Comments.

InputText: Renamed ImGuiTextEditCallback to ImGuiInputTextCallback, ImGuiTextEditCallbackData to ImGuiInputTextCallbackData for consistency. Kept redirection types (will obsolete).

InputText: Added support for buffer size/capacity changes via the ImGuiInputTextFlags_CallbackResize flag. (#2006, #1443, #1008).

InputText: Internal renaming of some fields + final copy uses edit_state.CurLenA+1 instead of buf_size.

InputText: (Breaking change) removed ImGuiTextEditCallbackData::ReadOnly since it is a duplication of (ImGuiTextEditCallbackData::Flags & ImGuiInputTextFlags_ReadOnly) (#211)

Added IMGUI_VERSION_NUM for easy compile-time testing. (#2025)

Metrics: Added io.MetricsActiveAllocations, moving away from the cross-context global counters than we previously used. (#1565, #1599, #586)

Selectable: Added ImGuiSelectableFlags_Disabled flag in the public API. (#211)

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.

Comments

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.

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

Fixes for pre-C++11 compilers. ...

That said, I think we can consider upgrading requirement to an early VS-friendly subset of C++11. The thing I would like the most from C++11 are forward-declared enum (from VS 2012 onward).

Added asserts to catch illegal modifications of the font atlas between NewFrame() and EndFrame()/Render(). (#1958)

Changed ImGui::GetTime() return value from float to double to avoid accumulating floating point imprecisions over time.

Ignore GCC warning (-Wclass-memaccess) in imgui.h (#1959)

ImGuiTextFilter, TextRange: removed cruft from TextRange since it's not a publicly and generic helper at the moment + marked internal stuff + changed a reference to a pointer. (#1879)

Revert part of c7016c2 incorrectly renaming ImGuiCol_NavWindowingHighlight to ImGuiCol_NavWindowListHighlight, that was wholly unnecessary (and not documented!). (also invalidate #1939)

Examples: include for intptr_t on tdm-gcc + mingw32 (#1936) + mouse buttons comments

IsItemHovered(): Added ImGuiHoveredFlags_AllowWhenDisabled flag to query hovered status on disabled items. (#1940, #211) ...

+ shallow changelog tweaks

Internals: Misc/shallow merge from Docking branch.

Nav: Added a CTRL+TAB window list and changed the highlight system accordingly. (#787)

Drag and Drop: Fixed ImGuiDragDropFlags_SourceNoDisableHover to affect hovering state prior to calling IsItemHovered() + fixed description. (#143)

Removed per-window ImGuiWindowFlags_ResizeFromAnySide beta flag in favor `io.OptResizeWindowsFromEdges=true` to enable the feature globally. (#1495) The feature is not currently enabled by default because it is not satisfying enough.

Links and thanks. Comments on using BeginCombo/EndCombo + moved the Combo() implementations closer to each others to maximize user seeing how it is implemented from any of the secondary function body.

Fixed software Hand cursor from not actually working. Fixed demo from crashing. Fixed typo and extraneous trailing space. Added Changelogs. (#1913, #1914)