isModifierPressed method Null safety
- ModifierKey key,
- {KeyboardSide side = KeyboardSide.any}
override
Returns true if the given ModifierKey was pressed at the time of this event.
If side
is specified, then this restricts its check to the specified
side of the keyboard. Defaults to checking for the key being down on
either side of the keyboard. If there is only one instance of the key on
the keyboard, then side
is ignored.
Implementation
@override
bool isModifierPressed(ModifierKey key, { KeyboardSide side = KeyboardSide.any }) {
assert(side != null);
switch (key) {
case ModifierKey.controlModifier:
return _isLeftRightModifierPressed(side, modifierControl, modifierLeftControl, modifierRightControl);
case ModifierKey.shiftModifier:
return _isLeftRightModifierPressed(side, modifierShift, modifierLeftShift, modifierRightShift);
case ModifierKey.altModifier:
return _isLeftRightModifierPressed(side, modifierAlt, modifierLeftAlt, modifierRightAlt);
case ModifierKey.metaModifier:
return _isLeftRightModifierPressed(side, modifierMeta, modifierLeftMeta, modifierRightMeta);
case ModifierKey.capsLockModifier:
return metaState & modifierCapsLock != 0;
case ModifierKey.numLockModifier:
return metaState & modifierNumLock != 0;
case ModifierKey.scrollLockModifier:
return metaState & modifierScrollLock != 0;
case ModifierKey.functionModifier:
return metaState & modifierFunction != 0;
case ModifierKey.symbolModifier:
return metaState & modifierSym != 0;
}
}