diff options
| -rw-r--r-- | area.go | 25 |
1 files changed, 5 insertions, 20 deletions
@@ -60,14 +60,15 @@ type AreaHandler interface { // You are allowed to do nothing in this handler (to ignore mouse events). // See MouseEvent for details. // If repaint is true, the Area is marked as needing to be redrawn. + // After handling the mouse event, package ui will decide whether to perform platform-dependent event chain continuation based on that platform's designated action (so it is not possible to override global mouse events this way). Mouse(e MouseEvent) (repaint bool) // Key is called when the Area receives a keyboard event. - // You are allowed to do nothing except return false for handled in this handler (to ignore keyboard events). - // Do not do nothing but return true for handled; this may have unintended consequences. + // You are allowed to do nothing in this handler (to ignore keyboard events). // See KeyEvent for details. // If repaint is true, the Area is marked as needing to be redrawn. - Key(e KeyEvent) (handled bool, repaint bool) + // After handling the key event, package ui will decide whether to perform platform-dependent event chain continuation based on that platform's designated action (so it is not possible to override global key events, such as Alt-Tab this way). + Key(e KeyEvent) (repaint bool) } // MouseEvent contains all the information for a mous event sent by Area.Mouse. @@ -129,24 +130,8 @@ func (e MouseEvent) HeldBits() (h uintptr) { // names chosen for keys here are based on their names // on US English QWERTY keyboards; see Key for details. // -// When you are finished processing the incoming event, -// return whether or not you did something in response -// to the given keystroke as the handled return of your -// AreaHandler's Key() implementation. If you send false, -// you indicate that you did not handle the keypress, and that -// the system should handle it instead. (Some systems will stop -// processing the keyboard event at all if you return true -// unconditionally, which may result in unwanted behavior like -// global task-switching keystrokes not being processed.) -// -// Note that even given the above, some systems might intercept -// some keystrokes (like Alt-F4 on various Unix systems) before -// Area will ever see them (and the Area might get an incorrect -// KeyEvent in this case, but this is not guaranteed); be wary. -// // If a key is pressed that is not supported by Key, ExtKey, -// or Modifiers, no KeyEvent will be produced, and package -// ui will act as if false was returned for handled. +// or Modifiers, no KeyEvent will be produced. type KeyEvent struct { // Key is a byte representing a character pressed // in the typewriter section of the keyboard. |