Magnifier

SOURCE_BOUND_MAX_IN_SURFACE

public static final int SOURCE_BOUND_MAX_IN_SURFACE

A source bound that will extend as much as possible, while remaining within the surface the content is copied from.

Constant Value: 0 (0x00000000)

SOURCE_BOUND_MAX_VISIBLE

public static final int SOURCE_BOUND_MAX_VISIBLE

A source bound that will extend as much as possible, while remaining within the visible region of the magnified view, as determined by View#getGlobalVisibleRect(Rect).

Constant Value: 1 (0x00000001)

Magnifier

public Magnifier (View view)

This constructor is deprecated.
Please use Builder instead

Initializes a magnifier.

dismiss

public void dismiss ()

Dismisses the magnifier from the screen. Calling this on a dismissed magnifier is a no-op.

getCornerRadius

public float getCornerRadius ()

The units of this value are pixels.

getDefaultHorizontalSourceToMagnifierOffset

public int getDefaultHorizontalSourceToMagnifierOffset ()

Returns the horizontal offset, in pixels, to be applied to the source center position to obtain the magnifier center position when show(float, float) is called. The value is ignored when show(float, float, float, float) is used instead.
The units of this value are pixels.

getDefaultVerticalSourceToMagnifierOffset

public int getDefaultVerticalSourceToMagnifierOffset ()

Returns the vertical offset, in pixels, to be applied to the source center position to obtain the magnifier center position when show(float, float) is called. The value is ignored when show(float, float, float, float) is used instead.
The units of this value are pixels.

getElevation

public float getElevation ()

The units of this value are pixels.

getHeight

public int getHeight ()

The units of this value are pixels.

getOverlay

public Drawable getOverlay ()

Returns the overlay to be drawn on the top of the magnifier, or null if no overlay should be drawn.

getPosition

public Point getPosition ()

Returns the top left coordinates of the magnifier, relative to the main application window. They will be determined by the coordinates of the last show(float, float) or show(float, float, float, float) call, adjusted to take into account any potential clamping behavior. The method can be used immediately after a #show call to find out where the magnifier will be positioned. However, the position of the magnifier will not be updated visually in the same frame, due to the async nature of the content copying and of the magnifier rendering. The method will return null if #show has not yet been called, or if the last operation performed was a #dismiss.

getSourceHeight

public int getSourceHeight ()

The units of this value are pixels.

getSourcePosition

public Point getSourcePosition ()

Returns the top left coordinates of the magnifier source (i.e. the view region going to be magnified and copied to the magnifier), relative to the window or surface the content is copied from. The content will be copied: - if the magnified view is a SurfaceView, from the surface backing it - otherwise, from the surface backing the main application window, and the coordinates returned will be relative to the main application window The method will return null if #show has not yet been called, or if the last operation performed was a #dismiss.

getSourceWidth

public int getSourceWidth ()

The units of this value are pixels.

getWidth

public int getWidth ()

The units of this value are pixels.

getZoom

public float getZoom ()

Returns the zoom to be applied to the magnified view region copied to the magnifier. If the zoom is x and the magnifier window size is (width, height), the original size of the content being magnified will be (width / x, height / x).

isClippingEnabled

public boolean isClippingEnabled ()

Returns whether the magnifier position will be adjusted such that the magnifier will be fully within the bounds of the main application window, by also avoiding any overlap with system insets (such as the one corresponding to the status bar) i.e. whether the area where the magnifier can be positioned will be clipped to the main application window and the system insets.

setZoom

public void setZoom (float zoom)

Sets the zoom to be applied to the chosen content before being copied to the magnifier popup. The change will become effective at the next #show or #update call.

show

public void show (float sourceCenterX, 
                float sourceCenterY, 
                float magnifierCenterX, 
                float magnifierCenterY)

Shows the magnifier on the screen at a position that is independent from its content position. The first two arguments represent the coordinates of the center of the content source going to be magnified and copied to the magnifier. The last two arguments represent the coordinates of the center of the magnifier itself. All four coordinates are relative to the top left corner of the magnified view. If you consider using this method such that the offset between the source center and the magnifier center coordinates remains constant, you should consider using method show(float, float) instead.

show

public void show (float sourceCenterX, 
                float sourceCenterY)

Shows the magnifier on the screen. The method takes the coordinates of the center of the content source going to be magnified and copied to the magnifier. The coordinates are relative to the top left corner of the magnified view. The magnifier will be positioned such that its center will be at the default offset from the center of the source. The default offset can be specified using the method Builder#setDefaultSourceToMagnifierOffset(int, int). If the offset should be different across calls to this method, you should consider to use method show(float, float, float, float) instead.

update

public void update ()

Asks the magnifier to update its content. It uses the previous coordinates passed to show(float, float) or show(float, float, float, float). The method only has effect if the magnifier is currently showing.