LemonEngine class abstract

Inheritance

Constructors

LemonEngine({String title = Default_Title, WidgetBuilder? buildLoadingScreen, ThemeData? themeData, Color backgroundColor = Default_Background_Color, Duration durationPerUpdate = Default_Duration_Per_Update})

Properties

app ↔ Watch<Widget>
latefinal
appBuilder ↔ WatchBuilder<Widget>
getter/setter pair
appInitialized ↔ bool
getter/setter pair
backgroundColor ↔ Color
getter/setter pair
batches1Rendered ↔ int
getter/setter pair
batches2Rendered ↔ int
getter/setter pair
batches4Rendered ↔ int
getter/setter pair
batches8Rendered ↔ int
getter/setter pair
batches16Rendered ↔ int
getter/setter pair
batches32Rendered ↔ int
getter/setter pair
batches64Rendered ↔ int
getter/setter pair
batches128Rendered ↔ int
getter/setter pair
batchesRendered ↔ int
getter/setter pair
bufferBlendMode ↔ BlendMode
getter/setter pair
bufferClr → Int32List
latefinal
bufferDst → Float32List
latefinal
bufferImage ↔ Image
getter/setter pair
bufferIndex ↔ int
getter/setter pair
bufferSrc → Float32List
latefinal
buildContext ↔ BuildContext
getter/setter pair
buildingInternal ↔ bool
getter/setter pair
cameraSmoothFollow ↔ bool
getter/setter pair
cameraX ↔ double
getter/setter pair
cameraY ↔ double
getter/setter pair
canvas ↔ Canvas
getter/setter pair
color ↔ Color
getter/setter pair
cursorType → Watch<CursorType>
final
deviceIsComputer → bool
no setter
deviceIsPhone → bool
no setter
deviceType → Watch<int>
final
drawCanvasAfterUpdate ↔ bool
getter/setter pair
durationPerUpdate → Watch<Duration>
final
fullScreen → Watch<bool>
final
fullScreenActive → bool
no setter
hashCode → int
The hash code for this object.
no setterinherited
internalBuild ↔ Widget
getter/setter pair
internalBuildCreated ↔ bool
getter/setter pair
isLocalHost → bool
no setter
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
keyboardState → Map<LogicalKeyboardKey, int>
final
keyPressedShiftLeft → bool
no setter
keyPressedSpace → bool
no setter
keyState → Map<int, bool>
final
keyStateDuration → Map<int, int>
final
lastRenderTime ↔ DateTime
getter/setter pair
lastUpdateTime ↔ DateTime
getter/setter pair
loadingScreenBuilder ↔ WidgetBuilder
override safe
getter/setter pair
minMSPerRender ↔ int
getter/setter pair
mouseLeftDownFrames ↔ int
getter/setter pair
mouseOverCanvas ↔ bool
getter/setter pair
mousePositionX ↔ double
getter/setter pair
mousePositionY ↔ double
getter/setter pair
mouseRightDown → Watch<bool>
final
mouseWorldX → double
no setter
mouseWorldY → double
no setter
msRender → Watch<int>
milliseconds elapsed since last render frame
final
msUpdate → Watch<int>
milliseconds elapsed since last update frame
final
notifierPaintForeground → ValueNotifier<int>
final
notifierPaintFrame → ValueNotifier<int>
final
onError ↔ (dynamic Function(Object error, StackTrace stack)?)
override safe
getter/setter pair
onPointerScrolled ↔ (dynamic Function(PointerScrollEvent value)?)
override safe
getter/setter pair
onPointerSignalEvent ↔ (dynamic Function(PointerSignalEvent value)?)
override safe
getter/setter pair
paint → Paint
final
paintFrame → int
no setter
previousMousePositionX ↔ double
getter/setter pair
previousMousePositionY ↔ double
getter/setter pair
renderFramesSkipped → Watch<int>
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
screen → Screen
final
Screen_Bottom ↔ double
getter/setter pair
Screen_Left ↔ double
getter/setter pair
Screen_Right ↔ double
getter/setter pair
Screen_Top ↔ double
getter/setter pair
screenArea → double
no setter
screenCenterRenderX → double
no setter
screenCenterRenderY → double
no setter
screenCenterWorldX → double
no setter
screenCenterWorldY → double
no setter
screenCenterX → double
no setter
screenCenterY → double
no setter
screenDiagonalLength → double
no setter
scrollSensitivity ↔ double
getter/setter pair
sharedPreferences ↔ dynamic
latefinal
targetZoom ↔ double
getter/setter pair
textPainter ↔ TextPainter
getter/setter pair
textSpans → Map<String, TextSpan>
final
themeData → Watch<ThemeData?>
final
title ↔ String
getter/setter pair
touchDownId ↔ int
getter/setter pair
touchHeldId ↔ int
getter/setter pair
updateFrame ↔ int
getter/setter pair
updateTimer ↔ Timer?
getter/setter pair
watchBackgroundColor → Watch<Color>
final
watchMouseLeftDown → Watch<bool>
final
watchTitle → Watch<String>
final
zoom ↔ double
getter/setter pair
zoomOnScroll ↔ bool
getter/setter pair
zoomSensitivity ↔ double
getter/setter pair

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
buildAtlasImage({required Image image, required double srcX, required double srcY, required double srcWidth, required double srcHeight, double scale = 1.0, int? color}) → Widget
buildCanvas({required PaintCanvas paint, ValueNotifier<int>? frame}) → Widget
buildDurationFramesPerSecond(int framesPerSecond) → Duration
buildUI(BuildContext context) → Widget
cameraCenter(double x, double y) → void
cameraFollow(double x, double y, [double speed = 0.00075]) → void
convertFramesPerSecondsToMilliseconds(int framesPerSecond) → int
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
disableKeyEventHandler() → void
disableRightClickContextMenu() → void
distanceFromMouse(double x, double y) → double
drawLine(double x1, double y1, double x2, double y2) → void
enableKeyEventHandler() → void
flushAll() → void
flushBuffer() → void
fullScreenEnter() → void
fullScreenExit() → void
fullscreenToggle() → void
getKeyDownDuration(int key) → int
getTextSpan(String text) → TextSpan
isOnscreen(double x, double y, {required double padding}) → bool
keyPressed(int key) → bool
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onChangedDurationPerUpdate(Duration duration) → void
onDispose() → void
onDrawCanvas(Canvas canvas, Size size) → void
override safe
onDrawForeground(Canvas canvas, Size size) → void
override safe
onInit(SharedPreferences sharedPreferences) → Future
onKeyDown(int keyCode) → void
triggered if the state of the key is down
onKeyPressed(int keyCode) → void
override safe triggered the first moment the key is pressed down
onKeyUp(int keyCode) → void
override safe triggered upon key release
onLeftClicked() → void
override safe
onLongPress() → void
override safe
onLongPressDown(LongPressDownDetails details) → void
override safe
onMouseEnterCanvas() → void
override safe
onMouseExitCanvas() → void
override safe
onMouseMoved(double x, double y) → void
override safe
onRightClicked() → void
override safe
onRightClickReleased() → void
override safe
onScaleEnd(ScaleEndDetails details) → void
override safe
onScaleStart(ScaleStartDetails details) → void
override safe
onScaleUpdate(ScaleUpdateDetails details) → void
override safe
onScreenSizeChanged(double previousWidth, double previousHeight, double newWidth, double newHeight) → void
override safe
onSecondaryTapDown(TapDownDetails details) → void
override safe
onTap() → void
override safe
onTapDown(TapDownDetails details) → void
override safe
onUpdate(double delta) → void
panCamera() → void
redrawCanvas() → void
refreshPage() → void
render({required int color, required double srcLeft, required double srcTop, required double srcRight, required double srcBottom, required double scale, required double rotation, required double dstX, required double dstY}) → void
renderCircle(double x, double y, double radius, Color color) → void
renderCircleFilled({required double radius, required double x, required double y}) → void
renderCircleOffset(Offset offset, double radius, Color color) → void
renderCircleOutline({required double radius, required double x, required double y, required Color color, int sides = 6, double width = 3}) → void
renderLine(double x1, double y1, double x2, double y2) → void
renderSprite({required Image image, required double srcX, required double srcY, required double srcWidth, required double srcHeight, required double dstX, required double dstY, double anchorX = 0.5, double anchorY = 0.5, double scale = 1.0, int color = 1}) → void
renderSpriteRotated({required Image image, required double srcX, required double srcY, required double srcWidth, required double srcHeight, required double dstX, required double dstY, required double rotation, double anchorX = 0.5, double anchorY = 0.5, double scale = 1.0, int color = 1}) → void
The anchor determines the point around which the sprite is rotated
renderText(String text, double x, double y, {Canvas? other, TextStyle? style}) → void
renderTextSpan(TextSpan textSpan, double x, double y, Canvas? other) → void
requestPointerLock() → void
screenToWorldX(double value) → double
screenToWorldY(double value) → double
setBlendModeDstATop() → void
setBlendModeModulate() → void
setCursorByName(String name) → void
setCursorCrosshair() → void
setCursorDefault() → void
setCursorPointer() → void
setCursorWait() → void
setDocumentTitle(String value) → void
setFavicon(String filename) → void
setFramesPerSecond(int framesPerSecond) → void
setPaintColor(Color value) → void
setPaintColorWhite() → void
setPaintStrokeWidth(double value) → void
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toggleDeviceType() → void
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited
worldToScreenX(double x) → double
worldToScreenY(double y) → double
writeText(String text, double x, double y) → void

Operators

operator ==(Object other) → bool
The equality operator.
inherited