ViewPortHandler class

Implementers

Constructors

ViewPortHandler()
Constructor - don't forget calling setChartDimens(...)

Properties

contentRect Rect
read-only
hashCode int
The hash code for this object. [...]
read-only, inherited
matrixBuffer List<double>
read / write
matrixTouch Matrix4
read-only
mCenterViewPortMatrixBuffer Matrix4
read / write
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
valsBufferForFitScreen List<double>
read / write

Methods

canZoomInMoreX() bool
Returns true if the chart is not yet fully zoomed in on the x-axis [...]
canZoomInMoreY() bool
Returns true if the chart is not yet fully zoomed in on the y-axis [...]
canZoomOutMoreX() bool
Returns true if the chart is not yet fully zoomed out on the x-axis [...]
canZoomOutMoreY() bool
Returns true if the chart is not yet fully zoomed out on the y-axis [...]
centerViewPort(List<double> transformedPts) → void
Centers the viewport around the specified position (x-index and y-value) in the chart. Centering the viewport outside the bounds of the chart is not possible. Makes most sense in combination with the setScaleMinima(...) method. [...]
chartHeight() double
chartWidth() double
contentBottom() double
contentHeight() double
contentLeft() double
contentRight() double
contentTop() double
contentWidth() double
fitScreen1() Matrix4
Resets all zooming and dragging and makes the chart fit exactly it's bounds.
fitScreen2(Matrix4 outputMatrix) → void
Resets all zooming and dragging and makes the chart fit exactly it's bounds. Output Matrix is available for those who wish to cache the object.
getChartHeight() double
getChartWidth() double
getContentCenter() MPPointF
getContentRect() Rect
getMatrixTouch() Matrix4
Returns the charts-touch matrix used for translation and scale on touch. [...]
getMaxScaleX() double
getMaxScaleY() double
getMinScaleX() double
getMinScaleY() double
getScaleX() double
returns the current x-scale factor
getScaleY() double
returns the current y-scale factor
getSmallestContentExtension() double
Returns the smallest extension of the content rect (width or height). [...]
getTransX() double
Returns the translation (drag / pan) distance on the x-axis [...]
getTransY() double
Returns the translation (drag / pan) distance on the y-axis [...]
hasChartDimens() bool
hasNoDragOffset() bool
Returns true if both drag offsets (x and y) are zero or smaller. [...]
isFullyZoomedOut() bool
if the chart is fully zoomed out, return true [...]
isFullyZoomedOutX() bool
Returns true if the chart is fully zoomed out on it's x-axis (horizontal). [...]
isFullyZoomedOutY() bool
Returns true if the chart is fully zoomed out on it's y-axis (vertical). [...]
isInBounds(double x, double y) bool
isInBoundsBottom(double y) bool
isInBoundsLeft(double x) bool
isInBoundsRight(double x) bool
isInBoundsTop(double y) bool
isInBoundsX(double x) bool
BELOW METHODS FOR BOUNDS CHECK
isInBoundsY(double y) bool
limitTransAndScale(Matrix4 matrix, Rect content) → void
limits the maximum scale and X translation of the given matrix [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
offsetBottom() double
offsetLeft() double
offsetRight() double
offsetTop() double
refresh(Matrix4 newMatrix) Matrix4
call this method to refresh the graph with a given matrix [...]
resetZoom(Matrix4 outputMatrix) → void
Zooms out to original size. @param outputMatrix
restrainViewPort(double offsetLeft, double offsetTop, double offsetRight, double offsetBottom) → void
setChartDimens(double width, double height) → void
Sets the width and height of the chart. [...]
setDragOffsetX(double offset) → void
Set an offset in dp that allows the user to drag the chart over it's bounds on the x-axis. [...]
setDragOffsetY(double offset) → void
Set an offset in dp that allows the user to drag the chart over it's bounds on the y-axis. [...]
setMaximumScaleX(double xScale) → void
Sets the maximum scale factor for the x-axis [...]
setMaximumScaleY(double yScale) → void
Sets the maximum scale factor for the y-axis [...]
setMinimumScaleX(double xScale) → void
Sets the minimum scale factor for the x-axis [...]
setMinimumScaleY(double yScale) → void
Sets the minimum scale factor for the y-axis [...]
setMinMaxScaleX(double minScaleX, double maxScaleX) → void
Sets the minimum and maximum scale factors for the x-axis [...]
setMinMaxScaleY(double minScaleY, double maxScaleY) → void
setZoom1(double scaleX, double scaleY) Matrix4
Sets the scale factor to the specified values. [...]
setZoom2(double scaleX, double scaleY, Matrix4 outputMatrix) → void
setZoom3(double scaleX, double scaleY, double x, double y) Matrix4
Sets the scale factor to the specified values. x and y is pivot. [...]
toString() String
Returns a string representation of this object.
inherited
translate1(List<double> transformedPts) Matrix4
Post-translates to the specified points. Less Performant. [...]
translate2(List<double> transformedPts, Matrix4 outputMatrix) → void
Post-translates to the specified points. Output matrix allows for caching objects. [...]
zoom1(double scaleX, double scaleY) Matrix4
Post-scales by the specified scale factors. [...]
zoom2(double scaleX, double scaleY, Matrix4 outputMatrix) → void
zoom3(double scaleX, double scaleY, double x, double y) Matrix4
Post-scales by the specified scale factors. x and y is pivot. [...]
zoom4(double scaleX, double scaleY, double x, double y, Matrix4 outputMatrix) → void
zoomIn1(double x, double y) Matrix4
Zooms in by 1.4f, x and y are the coordinates (in pixels) of the zoom center. [...]
zoomIn2(double x, double y, Matrix4 outputMatrix) → void
zoomOut1(double x, double y) Matrix4
Zooms out by 0.7f, x and y are the coordinates (in pixels) of the zoom center.
zoomOut2(double x, double y, Matrix4 outputMatrix) → void

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited