Fixed calling SetNextTreeNodeOpen() on a collapsed window leaking to next frame.

Factorized some code (+ declared as static function without namespace, a pattern with the Nav branch has started to use)

Examples: GLFW+GL2/GL3: Minor tweaks, comments.

Examples: DirectX9/10/11: Added WM_SYSKEYDOWN / WM_SYSKEYUP handlers so e.g. VK_MENU can be read.

Examples: DirectX9/10/11: Renamed WndProc handler to use a generic Win32 name + returning 0 to all messages is more correct.

Merge branch 'Gargaj-patch-1'

Examples: DirectX10, DirectX11: Using SetCapture/ReleaseCapture to get correct behavior (#1375) ...

ps: DirectX 12 example (#302) may want to adopt that as well.

Examples: DirectX9: Using SetCapture/ReleaseCapture to get correct behavior (#1375)

Fixed compilation for #1375 + coding style fixes.

Merge branch 'patch-1' of https://github.com/Gargaj/imgui into Gargaj-patch-1

MenuItem(): Tweaks to mimic exact spacing of BeginMenu() when inside a menu bar, which is a little misleading imho but may be useful. (#1387)

MenuItem(): Tweak to not draw over all horizontal space when in horizontal layout mode. (#1387)

Merge branch 'inolen-atlas_build_clear_font'

Font: Renamed ImFont::Clear() to ImFont::ClearOutputData() for consistency with what ImFontAtlas does. DisplayOffset is set by constructor but not reset by ClearOutputData. (#1349)

Demo: Fixed Fonts "set as default button" not having collading id on collapsed nodes.

Merge branch 'atlas_build_clear_font' of https://github.com/inolen/imgui into inolen-atlas_build_clear_font

Comments

Popups: Fixed right-click to close popups not handling modal windows properly. (~#439)

Popups: similarly to previous commit, we fix reopening a popup within a popup stack from truncating the whole stack. This is done by properly refocusing the lower level popup. (~#439)

Popups: fixed CloseInactivePopups() so that right-clicking to close one level of popups in a popups stack won't close the whole stack. This is done by properly refocusing the lower level popup. Fixes 87ae408 (~#439)

Added OpenPopupOnItemClick(); helper which mimic BeginPopupContextItem() but doesn't do the open. ...

Made the color popups uses this standard function so they handle reopening a context menu.

BeginPopupContextItem(), BeginPopupContextWindow(): Using newly introduced IsItemHovered() flags to allow reopening another context menu (over same or not same item) with right-click. (#439) (+1 squashed commits)

IsWindowHovered(): Changed default behavior to now return false is a widget from another window is active + Added support for ImGuiHoveredFlags_AllowWhenBlockedByActiveItem. (relate to drag'n drop idoms: #143)

IsItemHovered(), IsWindowHovered(): added flags to enable various and more specific behavior. Will enable improvements for popups/context menus and drag'n drop. (relate ~#439, #1013, #143, #925) ...

The legacy confusing IsItemRectHovered(), IsWindowRectHovered() can be completely removed now.
Changed IsWindowHovered() behavior with default parameter: it now return false is the window is blocked by a popup.
Demo: Added tests for those two functions.

Moved IMGUI_DISABLE_OBSOLETE_FUNCTIONS block lower in the imgui.h file so obsolete functions can use flags. Also sane to quarantine them outside of the respectable area.

Made the ImGuiWindowFlags_NoMove flag inherited from parent to child, so in a setup with RootWindow (no flag) -> Child (NoMove flag) -> SubChild (no flag) user won't be able to move the root window by clicking on SubChild. (#1381)

Fixed a bug allowing to move a _NoMove window from a child that doesn't have the flag. (#1381) ...

broken by e56eba4 (#1337)

Popups: popups can be closed with a right-click anywhere, without altering focus under the popup.(~#439)

Popups: Fixed a bug introduced in 1a35766 which made the BeginPopupContextXXX functions create popups without border. (nb: all that border mess is going away in styling clean up)

Refactor EndFrame() code that process focusing window with left mouse button. This commit should be no-op.