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.

Add TableView plus demo.

Update utf8 character input to Python3. Reorganize tests.

Update demos and tests.

Eliminate relative imports.

Handle curses resize event.

Update VerticalLayout/HorizontalLayout. Add layout demo. Add Size, Borders to common. Update Coords, Rect.

Add Pager.

Add inheritance diagram to documentation.

Add more generated documentation.

Update EventSource documentation.

TreeView: Add cursor, node collapse, reworked draw.

Use isinstance instead of type.

Added ComboBox, HorizontalLayout, TreeNode, TreeModel, TreeView. Widget is now descendant of EventSource. Improved color management (color prefixes).

Update editfield - place cursor to end initially.

New color management - named colors.

Test for GridLayout. New Label widget.

New GridLayout. Change cursor behavior (hide on unfocus event). Change resize event to propagate through containers. Change container clipping - allowlayout=false children are clipped without borders. More Widget doc.

Add escape sequences for linux console.

Fixed escape sequence handling.