5.5.1 event-mask

Values:

• :all-events-mask
• :button-motion-mask
• :button-press-mask
• :button-release-mask
• :button1-motion-mask
• :button2-motion-mask
• :button3-motion-mask
• :enter-notify-mask
• :exposure-mask
• :focus-change-mask
• :key-press-mask
• :key-release-mask
• :leave-notify-mask
• :pointer-motion-hint-mask
• :pointer-motion-mask
• :property-change-mask
• :proximity-in-mask
• :proximity-out-mask
• :scroll-mask
• :structure-mask
• :substructure-mask
• :visibility-notify-mask