Members
(static) DIGIT_KEYS :Array.<string>
- Source:
Enumerate the "digit keys"
Type:
- Array.<string>
(static) MOUSE_WHEEL_RATE_LIMIT :number
- Source:
Specify a rate limit for mouse wheel to gate repeated scrolling. This is especially important for continuous scrolling mice which emit hundreds of events per second. This designates a minimum number of milliseconds which must pass before another wheel event is handled
Type:
- number
(static) MOVEMENT_KEYS :Object
- Source:
Map keys used for movement
Type:
- Object
(static) ZOOM_KEYS :Object
- Source:
Map keys used for canvas zooming
Type:
- Object
_downKeys :Set
- Source:
The set of key codes which are currently depressed (down)
Type:
- Set
_handled :Set
- Source:
The set of key codes which have been already handled per workflow
Type:
- Set
digitKeys
- Source:
The key codes which represent a digit key
hasFocus
- Source:
Test whether an input currently has focus
moveKeys
- Source:
The key codes which represent a possible movement key
zoomKeys
- Source:
Return the key codes used for zooming the canvas
Methods
_handleCanvasPan()
- Source:
Handle panning the canvas using CTRL + directional keys
_onCompositionEnd(event)
- Source:
Input events do not fire with isComposing = false at the end of a composition event in Chrome See: https://github.com/w3c/uievents/issues/202
Parameters:
| Name | Type | Description |
|---|---|---|
event |
CompositionEvent |
getKey(event) → {string}
- Source:
Get a standardized keyboard code for a given event
Parameters:
| Name | Type | Description |
|---|---|---|
event |
KeyboardEvent | The originating keypress event |
Returns:
The standardized string code to use
- Type
- string
isCtrl(event) → {boolean}
- Source:
A helper method to test whether, given an Event, the CTRL (or CMD) keys are pressed
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Returns:
- Type
- boolean
isDown(code)
- Source:
Return whether the key code is currently in the DOWN state
Parameters:
| Name | Type | Description |
|---|---|---|
code |
string | The key code to test |