```
public class ViewPortHandler

                    
```
Class that contains information about the charts current viewport settings, including offsets, scale & translation levels, ... Constructor - don't forget calling setChartDimens(...)

Field Summary

Fields
Modifier and Type	Field	Description
`private final Matrix`	`matrixTouch`
`private RectF`	`contentRect`
`private Float`	`chartWidth`
`private Float`	`chartHeight`
`private Float`	`minScaleY`
`private Float`	`maxScaleY`
`private Float`	`minScaleX`
`private Float`	`maxScaleX`
`private Float`	`scaleX`
`private Float`	`scaleY`
`private Float`	`transX`
`private Float`	`transY`
`private final MPPointF`	`contentCenter`
`private final Float`	`smallestContentExtension`
`private final Boolean`	`isFullyZoomedOut`
`private final Boolean`	`isFullyZoomedOutY`
`private final Boolean`	`isFullyZoomedOutX`

Constructor Summary

Constructors
Constructor	Description
`ViewPortHandler()`

Method Summary

Modifier and Type	Method	Description
`final Matrix`	`getMatrixTouch()`	Returns the charts-touch matrix used for translation and scale on touch.
`final RectF`	`getContentRect()`	this rectangle defines the area in which graph values can be drawn
`final Unit`	`setContentRect(RectF contentRect)`
`final Float`	`getChartWidth()`
`final Unit`	`setChartWidth(Float chartWidth)`
`final Float`	`getChartHeight()`
`final Unit`	`setChartHeight(Float chartHeight)`
`final Float`	`getMinScaleY()`	minimum scale value on the y-axis
`final Unit`	`setMinScaleY(Float minScaleY)`
`final Float`	`getMaxScaleY()`	maximum scale value on the y-axis
`final Unit`	`setMaxScaleY(Float maxScaleY)`
`final Float`	`getMinScaleX()`	minimum scale value on the x-axis
`final Unit`	`setMinScaleX(Float minScaleX)`
`final Float`	`getMaxScaleX()`	maximum scale value on the x-axis
`final Unit`	`setMaxScaleX(Float maxScaleX)`
`final Float`	`getScaleX()`	contains the current scale factor of the x-axis
`final Unit`	`setScaleX(Float scaleX)`
`final Float`	`getScaleY()`	returns the current y-scale factor
`final Unit`	`setScaleY(Float scaleY)`
`final Float`	`getTransX()`	Returns the translation (drag / pan) distance on the x-axis
`final Unit`	`setTransX(Float transX)`
`final Float`	`getTransY()`	Returns the translation (drag / pan) distance on the y-axis
`final Unit`	`setTransY(Float transY)`
`final MPPointF`	`getContentCenter()`
`final Float`	`getSmallestContentExtension()`
`final Boolean`	`getIsFullyZoomedOut()`
`final Boolean`	`getIsFullyZoomedOutY()`
`final Boolean`	`getIsFullyZoomedOutX()`
`final Unit`	`setChartDimens(Float width, Float height)`	Sets the width and height of the chart.
`final Boolean`	`hasChartDimens()`
`final Unit`	`restrainViewPort(Float offsetLeft, Float offsetTop, Float offsetRight, Float offsetBottom)`
`final Float`	`offsetLeft()`
`final Float`	`offsetRight()`
`final Float`	`offsetTop()`
`final Float`	`offsetBottom()`
`final Float`	`contentTop()`
`final Float`	`contentLeft()`
`final Float`	`contentRight()`
`final Float`	`contentBottom()`
`final Float`	`contentWidth()`
`final Float`	`contentHeight()`
`final Matrix`	`zoomIn(Float x, Float y)`	Zooms in by 1.4f, x and y are the coordinates (in pixels) of the zoom center.
`final Unit`	`zoomIn(Float x, Float y, Matrix outputMatrix)`
`final Matrix`	`zoomOut(Float x, Float y)`	Zooms out by 0.7f, x and y are the coordinates (in pixels) of the zoom center.
`final Unit`	`zoomOut(Float x, Float y, Matrix outputMatrix)`
`final Unit`	`resetZoom(Matrix outputMatrix)`	Zooms out to original size.
`final Matrix`	`zoom(Float scaleX, Float scaleY)`	Post-scales by the specified scale factors.
`final Unit`	`zoom(Float scaleX, Float scaleY, Matrix outputMatrix)`
`final Matrix`	`zoom(Float scaleX, Float scaleY, Float x, Float y)`	Post-scales by the specified scale factors.
`final Unit`	`zoom(Float scaleX, Float scaleY, Float x, Float y, Matrix outputMatrix)`
`final Matrix`	`setZoom(Float scaleX, Float scaleY)`	Sets the scale factor to the specified values.
`final Unit`	`setZoom(Float scaleX, Float scaleY, Matrix outputMatrix)`
`final Matrix`	`setZoom(Float scaleX, Float scaleY, Float x, Float y)`	Sets the scale factor to the specified values.
`final Matrix`	`fitScreen()`	Resets all zooming and dragging and makes the chart fit exactly it's bounds.
`final Unit`	`fitScreen(Matrix outputMatrix)`	Resets all zooming and dragging and makes the chart fit exactly it's bounds.
`final Matrix`	`translate(FloatArray transformedPts)`	Post-translates to the specified points.
`final Unit`	`translate(FloatArray transformedPts, Matrix outputMatrix)`	Post-translates to the specified points.
`final Unit`	`centerViewPort(FloatArray transformedPts, View view)`	Centers the viewport around the specified position (x-index and y-value) in the chart.
`final Matrix`	`refresh(Matrix newMatrix, View chart, Boolean invalidate)`	call this method to refresh the graph with a given matrix
`final Unit`	`limitTransAndScale(Matrix matrix, RectF content)`	limits the maximum scale and X translation of the given matrix
`final Unit`	`setMinimumScaleX(Float xScale)`	Sets the minimum scale factor for the x-axis
`final Unit`	`setMaximumScaleX(Float xScale)`	Sets the maximum scale factor for the x-axis
`final Unit`	`setMinMaxScaleX(Float minScaleX, Float maxScaleX)`	Sets the minimum and maximum scale factors for the x-axis
`final Unit`	`setMinimumScaleY(Float yScale)`	Sets the minimum scale factor for the y-axis
`final Unit`	`setMaximumScaleY(Float yScale)`	Sets the maximum scale factor for the y-axis
`final Unit`	`setMinMaxScaleY(Float minScaleY, Float maxScaleY)`
`final Boolean`	`isInBoundsX(Float x)`	BELOW METHODS FOR BOUNDS CHECK
`final Boolean`	`isInBoundsY(Float y)`
`final Boolean`	`isInBounds(Float x, Float y)`
`final Boolean`	`isInBoundsLeft(Float x)`
`final Boolean`	`isInBoundsRight(Float x)`
`final Boolean`	`isInBoundsTop(Float y)`
`final Boolean`	`isInBoundsBottom(Float y)`
`final Unit`	`setDragOffsetX(Float offset)`	Set an offset in dp that allows the user to drag the chart over it's bounds on the x-axis.
`final Unit`	`setDragOffsetY(Float offset)`	Set an offset in dp that allows the user to drag the chart over it's bounds on the y-axis.
`final Boolean`	`hasNoDragOffset()`	Returns true if both drag offsets (x and y) are zero or smaller.
`final Boolean`	`canZoomOutMoreX()`	Returns true if the chart is not yet fully zoomed out on the x-axis
`final Boolean`	`canZoomInMoreX()`	Returns true if the chart is not yet fully zoomed in on the x-axis
`final Boolean`	`canZoomOutMoreY()`	Returns true if the chart is not yet fully zoomed out on the y-axis
`final Boolean`	`canZoomInMoreY()`	Returns true if the chart is not yet fully zoomed in on the y-axis

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- ViewPortHandler
```
ViewPortHandler()
```

Method Detail

getMatrixTouch
```
 final Matrix getMatrixTouch()
```
Returns the charts-touch matrix used for translation and scale on touch.

getContentRect
```
 final RectF getContentRect()
```
this rectangle defines the area in which graph values can be drawn

setContentRect

 final Unit setContentRect(RectF contentRect)

getChartWidth
```
 final Float getChartWidth()
```

setChartWidth

 final Unit setChartWidth(Float chartWidth)

getChartHeight
```
 final Float getChartHeight()
```

setChartHeight

 final Unit setChartHeight(Float chartHeight)

getMinScaleY
```
 final Float getMinScaleY()
```
minimum scale value on the y-axis

setMinScaleY

 final Unit setMinScaleY(Float minScaleY)

getMaxScaleY
```
 final Float getMaxScaleY()
```
maximum scale value on the y-axis

setMaxScaleY

 final Unit setMaxScaleY(Float maxScaleY)

getMinScaleX
```
 final Float getMinScaleX()
```
minimum scale value on the x-axis

setMinScaleX

 final Unit setMinScaleX(Float minScaleX)

getMaxScaleX
```
 final Float getMaxScaleX()
```
maximum scale value on the x-axis

setMaxScaleX

 final Unit setMaxScaleX(Float maxScaleX)

getScaleX
```
 final Float getScaleX()
```
contains the current scale factor of the x-axis

setScaleX
```
 final Unit setScaleX(Float scaleX)
```

getScaleY
```
 final Float getScaleY()
```
returns the current y-scale factor

setScaleY
```
 final Unit setScaleY(Float scaleY)
```

getTransX
```
 final Float getTransX()
```
Returns the translation (drag / pan) distance on the x-axis

setTransX
```
 final Unit setTransX(Float transX)
```

getTransY
```
 final Float getTransY()
```
Returns the translation (drag / pan) distance on the y-axis

setTransY
```
 final Unit setTransY(Float transY)
```

getContentCenter
```
 final MPPointF getContentCenter()
```

getSmallestContentExtension

 final Float getSmallestContentExtension()

getIsFullyZoomedOut
```
 final Boolean getIsFullyZoomedOut()
```

getIsFullyZoomedOutY
```
 final Boolean getIsFullyZoomedOutY()
```

getIsFullyZoomedOutX
```
 final Boolean getIsFullyZoomedOutX()
```

setChartDimens

 final Unit setChartDimens(Float width, Float height)

Sets the width and height of the chart.

hasChartDimens
```
 final Boolean hasChartDimens()
```

restrainViewPort

 final Unit restrainViewPort(Float offsetLeft, Float offsetTop, Float offsetRight, Float offsetBottom)

offsetLeft
```
 final Float offsetLeft()
```

offsetRight
```
 final Float offsetRight()
```

offsetTop
```
 final Float offsetTop()
```

offsetBottom
```
 final Float offsetBottom()
```

contentTop
```
 final Float contentTop()
```

contentLeft
```
 final Float contentLeft()
```

contentRight
```
 final Float contentRight()
```

contentBottom
```
 final Float contentBottom()
```

contentWidth
```
 final Float contentWidth()
```

contentHeight
```
 final Float contentHeight()
```

zoomIn
```
 final Matrix zoomIn(Float x, Float y)
```
Zooms in by 1.4f, x and y are the coordinates (in pixels) of the zoom center.

zoomIn

 final Unit zoomIn(Float x, Float y, Matrix outputMatrix)

zoomOut
```
 final Matrix zoomOut(Float x, Float y)
```
Zooms out by 0.7f, x and y are the coordinates (in pixels) of the zoom center.

zoomOut

 final Unit zoomOut(Float x, Float y, Matrix outputMatrix)

resetZoom

 final Unit resetZoom(Matrix outputMatrix)

Zooms out to original size.

zoom

 final Matrix zoom(Float scaleX, Float scaleY)

Post-scales by the specified scale factors.

zoom

 final Unit zoom(Float scaleX, Float scaleY, Matrix outputMatrix)

zoom

 final Matrix zoom(Float scaleX, Float scaleY, Float x, Float y)

Post-scales by the specified scale factors. x and y is pivot.

zoom

 final Unit zoom(Float scaleX, Float scaleY, Float x, Float y, Matrix outputMatrix)

setZoom

 final Matrix setZoom(Float scaleX, Float scaleY)

Sets the scale factor to the specified values.

setZoom

 final Unit setZoom(Float scaleX, Float scaleY, Matrix outputMatrix)

setZoom

 final Matrix setZoom(Float scaleX, Float scaleY, Float x, Float y)

Sets the scale factor to the specified values. x and y is pivot.

fitScreen
```
 final Matrix fitScreen()
```
Resets all zooming and dragging and makes the chart fit exactly it's bounds.

fitScreen
```
 final Unit fitScreen(Matrix outputMatrix)
```
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.

translate
```
 final Matrix translate(FloatArray transformedPts)
```
Post-translates to the specified points. Less Performant.

translate
```
 final Unit translate(FloatArray transformedPts, Matrix outputMatrix)
```
Post-translates to the specified points. Output matrix allows for caching objects.

centerViewPort
```
 final Unit centerViewPort(FloatArray transformedPts, View view)
```
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.

Parameters:

transformedPts - the position to center view viewport to

refresh

 final Matrix refresh(Matrix newMatrix, View chart, Boolean invalidate)

call this method to refresh the graph with a given matrix

limitTransAndScale
```
 final Unit limitTransAndScale(Matrix matrix, RectF content)
```
limits the maximum scale and X translation of the given matrix

setMinimumScaleX
```
 final Unit setMinimumScaleX(Float xScale)
```
Sets the minimum scale factor for the x-axis

setMaximumScaleX
```
 final Unit setMaximumScaleX(Float xScale)
```
Sets the maximum scale factor for the x-axis

setMinMaxScaleX
```
 final Unit setMinMaxScaleX(Float minScaleX, Float maxScaleX)
```
Sets the minimum and maximum scale factors for the x-axis

setMinimumScaleY
```
 final Unit setMinimumScaleY(Float yScale)
```
Sets the minimum scale factor for the y-axis

setMaximumScaleY
```
 final Unit setMaximumScaleY(Float yScale)
```
Sets the maximum scale factor for the y-axis

setMinMaxScaleY

 final Unit setMinMaxScaleY(Float minScaleY, Float maxScaleY)

isInBoundsX
```
 final Boolean isInBoundsX(Float x)
```
BELOW METHODS FOR BOUNDS CHECK

isInBoundsY
```
 final Boolean isInBoundsY(Float y)
```

isInBounds

 final Boolean isInBounds(Float x, Float y)

isInBoundsLeft
```
 final Boolean isInBoundsLeft(Float x)
```

isInBoundsRight

 final Boolean isInBoundsRight(Float x)

isInBoundsTop
```
 final Boolean isInBoundsTop(Float y)
```

isInBoundsBottom

 final Boolean isInBoundsBottom(Float y)

setDragOffsetX
```
 final Unit setDragOffsetX(Float offset)
```
Set an offset in dp that allows the user to drag the chart over it's bounds on the x-axis.

setDragOffsetY
```
 final Unit setDragOffsetY(Float offset)
```
Set an offset in dp that allows the user to drag the chart over it's bounds on the y-axis.

hasNoDragOffset
```
 final Boolean hasNoDragOffset()
```
Returns true if both drag offsets (x and y) are zero or smaller.

canZoomOutMoreX
```
 final Boolean canZoomOutMoreX()
```
Returns true if the chart is not yet fully zoomed out on the x-axis

canZoomInMoreX
```
 final Boolean canZoomInMoreX()
```
Returns true if the chart is not yet fully zoomed in on the x-axis

canZoomOutMoreY
```
 final Boolean canZoomOutMoreY()
```
Returns true if the chart is not yet fully zoomed out on the y-axis

canZoomInMoreY
```
 final Boolean canZoomInMoreY()
```
Returns true if the chart is not yet fully zoomed in on the y-axis

Class ViewPortHandler

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ViewPortHandler

Method Detail

getMatrixTouch

getContentRect

setContentRect

getChartWidth

setChartWidth

getChartHeight

setChartHeight

getMinScaleY

setMinScaleY

getMaxScaleY

setMaxScaleY

getMinScaleX

setMinScaleX

getMaxScaleX

setMaxScaleX

getScaleX

setScaleX

getScaleY

setScaleY

getTransX

setTransX

getTransY

setTransY

getContentCenter

getSmallestContentExtension

getIsFullyZoomedOut

getIsFullyZoomedOutY

getIsFullyZoomedOutX

setChartDimens

hasChartDimens

restrainViewPort

offsetLeft

offsetRight

offsetTop

offsetBottom

contentTop

contentLeft

contentRight

contentBottom

contentWidth

contentHeight

zoomIn

zoomIn

zoomOut

zoomOut

resetZoom

zoom

zoom

zoom

zoom

setZoom

setZoom

setZoom

fitScreen

fitScreen

translate

translate

centerViewPort

refresh

limitTransAndScale

setMinimumScaleX

setMaximumScaleX

setMinMaxScaleX

setMinimumScaleY

setMaximumScaleY

setMinMaxScaleY

isInBoundsX

isInBoundsY

isInBounds

isInBoundsLeft

isInBoundsRight

isInBoundsTop