v0.8.0

v0.8.0

Features:

• Add mouse event handling (Widget::on_event)
• Add Application::message to capture event messages
• Add Button widget
• Add default mouse event handling to some widgets
  • List, Table and Scrollable implement scrolling
• Add option to set custom event Message to some widgets
  • Button, ProgressBar, Scrollable, Table
• Add LayoutNode for layout caching (replaces Cache)

Changes:

• Add delta argument (time between frames) to Application::update
• Remove BgGrad layout forwarding (such as BgGrad::center,...)
• Widget trait API changes due to LayoutNode replacing Cache
  • diff and layout are added to the Widget
  • render method accepts LayoutNode instead of Cache and Rect