•  Fixes:
• Added vector to store hidden gadgets, reducing the complexity of maintaining gadget lists and focus.
• Removed all screen dimension magic numbers and replaced with defines.
• Tidied up a lot of the code.
• Gadget deletion queue now handles solely in the VBL events.
• Optimised TextWriter by preventing it from drawing empty glyphs.
• Changed TextWriter into a static class.
• Optimised TextViewer so that it uses much less memory.
• Text font and glyph font now sent around hierarchy instead of each gadget creating their own font.
• Improved Font class.
• Removed 8-bit code from Bitmap class.
• General refactoring and code tidying.
• Made EventHandler methods virtual instead of pure virtual.
• Split gadget events into "raiseXEvent()" and "x()" functions.
• Clicking a gadget automatically notifies its parent that it is the new clicked gadget.
• Moved dirty child redraw function into gadget class.
• Added horizontal clipping to rect splitting functions.
• Fixed SuperBitmap border.
• Relevant gadget methods are now virtual for subclassing.
• Removed all unnecessary all_gfx includes.
• New features:
• Added non-draggable screens and windows.
• Added show/hide gadget functionality.
• Added ability to hide a window instead of closing it when the close button is clicked.
• Added closed/hidden/shown events.
• Added monochrome output to Font class and definable text colour.
• Added drawText() function to SuperBitmap class.
• Added window depth button.
• Added enable/disable gadget.
• Started work on alert requester.
• Moved text data manipulation out of TextViewer into a separate class.
• Added Gadget::moveTo method.
• Added Gadget::resize method.
• Added resize event.
• Added move event.
• Added value change event.
• Added window resizing (API only).
• Added radio buttons.
• Added radio button groups.
• Added "clicked" glyphs for screen and window depth buttons.
• Most gadget action methods (click(), moveTo(), etc) return bools to indicate success or failure.
• Added enabled/disabled events.
• Added checkboxes.
• Added NDS screen flipping and support for top NDS screen.
• Added screen flipping gadget.
• Updated screens to swap to front when clicked.
• Added a variety of gadget depth manipulation functions.
• Split Woopsi library code into separate directory for ease of integration in other projects.
  

Via ant512's sourceforge page