Add sdlterm to setup.py. Simplify color description, allow missing bg.

DriverCurses: filter mousemove - generate event only when coordinates changes.

DriverSDL: add support for key modifiers.

Fix.

DriverCurses: Add support for key modifiers.

Drop Container.offset, add special layout for that - OffsetLayout. Add Widget.bring_up(): moves child to end of children list.

Rework MenuBar. Add MenuButton. Add mouse event cascading to floaters. LinearLayout: spacing now applies to all children, not just those with expand. Fix Window resize request inside layouts. UnicodeGraphics: prepare for styling/theming.

Rework layouts: Layout is now normal Container which places its children upon resize event. Drop TopWindow, top is now any subclass of Container. Add floater concept: floaters are widgets drawn over normal widgets, not clipped by parent. Add HScrollbar and Scrollbar abstract base class.

DriverSDL: Fix.

DriverSDL: Implement blink attribute.

Cleanup timeouts.

sdlterm: Cleanup exceptions.

DriverSDL: Add support for timeouts.

Drop PyGame driver, replaced by compiled SDL driver.

DriverSDL: mousewheel, key repeation.

DriverSDL: system font lookup.

DriverSDL: Implement cursor, handle window resize.

Update SDL driver: Enlarge char, attr to 32 bits, 64 bits per terminal cell. Colors and attributes are complete, only blink does not work.

Clean up: expand unwanted tabs.

DriverSDL: Implement colors.

Update sdlterm: Optimize commit() - use two cell buffers, redraw only dirty cells, not everything. Fix keypress event, filter mousemove.

Add SDL driver prototype. Update sdlterm: Handle keyboard, mouse events. Add glyph cache.

Add sdlterm prototype: extension module for SDL driver.

Minor updates. Replace super() with direct class reference. Add demo_colors.

Clean up Emitter class, simplify event handling. Fix Container.focusnext() method. Add events test (handler auto-registration, order).

Add Widget.spot property. TreeView: move spot with cursor node. ScrollView: scroll when spot moves.

Rename emitter module to events.

Make Container.layout a property.

Update Emitter: All event handlers now have exactly one argument: object inherited from Event class, which carries any data.

Add ScrollView widget. Update Emitter, rename "on_event" methods to "_handle_event". Update VScrollbar, Layout.

Fixes.

Documentation, fix names of focus methods.

Clean up and update TreeView.

Update docs.

Fix mousewheel.

Update event propagation, keypress event, focusing.

Refactoring: rename eventsource module to emitter.

Clean up, refactoring. Rename EventSource to Emitter, begin merging emit() method with handle().

Update PyGame driver.

Add setup script. Add Checkbox widget + demo. Updates.

Import only one driver from application.

DriverPygame: output to character buffer, draw whole screen at once.

DriverPygame: add colors, make window resizable.

DriverPygame: add mouse events and key press autorepeat.

Partial DriverPygame.putch() implementation. Add patch for PyGame implementing font.render_glyph(). Add test for PyGame font module. Add special key definitions to DriverPygame.

Add DriverPygame (incomplete). Move unicode graphics constants to UnicodeGraphics class. Move shared parts of drivers to Driver base class.

Rename BackendCurses to DriverCurses. Add DriverDummy - dummy driver for debugging purposes. Move clipping stack from driver to common.ClipStack class.

Update TableView: cursor movement.