A simple package for dispaying virtual keyboards on a devices like kiosks and ATMs. The library is written in Dart and has no native code dependancy.
Virtual keyboard provides a core set of functionality to display onscreen virtual keyboards. Managing the events sould be done on the project level.
Flutter widget to show virtual keyboards.
// Keyboard Type: Can be Numeric or Alphanumeric.
VirtualKeyboardType type// Callback for Key press event. Called with pressed `Key` object.
Function onKeyPress;// Virtual keyboard height. Default is 300.
double height;// Color for key texts and icons.
Color textColor;// Font size for keyboard keys.
double fontSize;;// Only Caps letters enabled.
bool alwaysCaps;;enum of Available Virtual Keyboard Types.
// Numeric only.
VirtualKeyboardType.Numeric// Alphanumeric: letters`[A-Z]` + numbers`[0-9]` + `@` + `.`.
VirtualKeyboardType.AlphanumericVirtual Keyboard key.
// The text of the key.
String text// The capitalized text of the key.
String capsText;// Action or String
VirtualKeyboardKeyType keyType;// Action of the key.
VirtualKeyboardKeyAction action;Type for virtual keyboard key.
// Can be an action key - Return, Backspace, etc.
VirtualKeyboardKeyType.Action// Keys that have text values - letters, numbers, comma ...
VirtualKeyboardKeyType.String/// Virtual keyboard actions.
enum VirtualKeyboardKeyAction { Backspace, Return, Shift, Space }// Wrap the keyboard with Container to set background color.
Container(
// Keyboard is transparent
color: Colors.deepPurple,
child: VirtualKeyboard(
// Default height is 300
height: 350,
// Default is black
textColor: Colors.white,
// Default 14
fontSize: 20,
// [A-Z, 0-9]
type: VirtualKeyboardType.Alphanumeric,
// Callback for key press event
onKeyPress: _onKeyPress),
)Container(
// Keyboard is transparent
color: Colors.red,
child: VirtualKeyboard(
// [0-9] + .
type: VirtualKeyboardType.Numeric,
// Callback for key press event
onKeyPress: (key) => print(key.text)),
) Container(
color: Colors.deepPurple,
child: VirtualKeyboard(
height: keyboardHeight,
textColor: Colors.white,
fontSize: 20,
builder: _builder,
type: VirtualKeyboardType.Numeric,
onKeyPress: _onKeyPress),
)
/// Builder for keyboard keys.
Widget _builder(BuildContext context, VirtualKeyboardKey key) {
Widget keyWidget;
switch (key.keyType) {
case VirtualKeyboardKeyType.String:
// Draw String key.
keyWidget = _keyboardDefaultKey(key);
break;
case VirtualKeyboardKeyType.Action:
// Draw action key.
keyWidget = _keyboardDefaultActionKey(key);
break;
}
return keyWidget;
} // Just local variable. Use Text widget or similar to show in UI.
String text;
/// Fired when the virtual keyboard key is pressed.
_onKeyPress(VirtualKeyboardKey key) {
if (key.keyType == VirtualKeyboardKeyType.String) {
text = text + (shiftEnabled ? key.capsText : key.text);
} else if (key.keyType == VirtualKeyboardKeyType.Action) {
switch (key.action) {
case VirtualKeyboardKeyAction.Backspace:
if (text.length == 0) return;
text = text.substring(0, text.length - 1);
break;
case VirtualKeyboardKeyAction.Return:
text = text + '\n';
break;
case VirtualKeyboardKeyAction.Space:
text = text + key.text;
break;
case VirtualKeyboardKeyAction.Shift:
shiftEnabled = !shiftEnabled;
break;
default:
}
}
// Update the screen
setState(() {});
}