ZoomableView (NetEditor Android Panel 17.0 API)

java.lang.Object
- android.view.View
- - org.arakhne.afc.ui.android.zoom.ZoomableView

All Implemented Interfaces:: android.graphics.drawable.Drawable.Callback, android.view.accessibility.AccessibilityEventSource, android.view.KeyEvent.Callback, ZoomableContext

Direct Known Subclasses:: FigureView

public abstract class ZoomableView
extends android.view.View
implements ZoomableContext

This abstract view provides the tools to move and scale the view. It is abstract because it does not draw anything.

The implementation of the ZoomableView handles the pointer and key events as following:

Event	Status	Callback	Note
POINTER_PRESSED	supported	`onPointerPressed(PointerEvent)`	Allways called
POINTER_DRAGGED	supported	`onPointerDragged(PointerEvent)`	Called only when the scale and move gestures are not in progress
POINTER_RELEASED	supported	`onPointerReleased(PointerEvent)`	Called only when the scale and move gestures are not in progress
POINTER_MOVED	not supported		Pointer move on a touch screen cannot be detected?
POINTER_CLICK	not supported		See `View.setOnClickListener(OnClickListener)`
POINTER_LONG_CLICK	not supported		See `View.setOnLongClickListener(OnLongClickListener)`
KEY_PRESSED	not supported		See `View.onKeyDown(int, android.view.KeyEvent)`
KEY_RELEASED	not supported		See `View.onKeyUp(int, android.view.KeyEvent)`
KEY_TYPED	not supported		See `View.onKeyUp(int, android.view.KeyEvent)`

The function onDrawView(Canvas, float, CenteringTransform)} may use an instance of the graphical context DroidZoomableGraphics2D to draw the elements according to the zooming attributes.

Version:: $Name$ $Revision$ $Date$
Author:: $Author: galland$
See Also:: DroidZoomableGraphics2D
Maven Group Id:: $GroupId$
Maven Artifact Id:: $ArtifactId$

Nested Class Summary
- Nested classes/interfaces inherited from class android.view.View
  android.view.View.AccessibilityDelegate, android.view.View.BaseSavedState, android.view.View.DragShadowBuilder, android.view.View.MeasureSpec, android.view.View.OnAttachStateChangeListener, android.view.View.OnClickListener, android.view.View.OnCreateContextMenuListener, android.view.View.OnDragListener, android.view.View.OnFocusChangeListener, android.view.View.OnGenericMotionListener, android.view.View.OnHoverListener, android.view.View.OnKeyListener, android.view.View.OnLayoutChangeListener, android.view.View.OnLongClickListener, android.view.View.OnSystemUiVisibilityChangeListener, android.view.View.OnTouchListener

Field Summary
- Fields inherited from class android.view.View
  ALPHA, DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_LOW, EMPTY_STATE_SET, ENABLED_FOCUSED_SELECTED_STATE_SET, ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_FOCUSED_STATE_SET, ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, ENABLED_SELECTED_STATE_SET, ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_STATE_SET, ENABLED_WINDOW_FOCUSED_STATE_SET, FIND_VIEWS_WITH_CONTENT_DESCRIPTION, FIND_VIEWS_WITH_TEXT, FOCUS_BACKWARD, FOCUS_DOWN, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_UP, FOCUSABLES_ALL, FOCUSABLES_TOUCH_MODE, FOCUSED_SELECTED_STATE_SET, FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, FOCUSED_STATE_SET, FOCUSED_WINDOW_FOCUSED_STATE_SET, GONE, HAPTIC_FEEDBACK_ENABLED, IMPORTANT_FOR_ACCESSIBILITY_AUTO, IMPORTANT_FOR_ACCESSIBILITY_NO, IMPORTANT_FOR_ACCESSIBILITY_YES, INVISIBLE, KEEP_SCREEN_ON, LAYER_TYPE_HARDWARE, LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE, MEASURED_HEIGHT_STATE_SHIFT, MEASURED_SIZE_MASK, MEASURED_STATE_MASK, MEASURED_STATE_TOO_SMALL, NO_ID, OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS, OVER_SCROLL_NEVER, PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_SELECTED_STATE_SET, PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_STATE_SET, PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_SELECTED_STATE_SET, PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_STATE_SET, PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_SELECTED_STATE_SET, PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_WINDOW_FOCUSED_STATE_SET, ROTATION, ROTATION_X, ROTATION_Y, SCALE_X, SCALE_Y, SCREEN_STATE_OFF, SCREEN_STATE_ON, SCROLLBAR_POSITION_DEFAULT, SCROLLBAR_POSITION_LEFT, SCROLLBAR_POSITION_RIGHT, SCROLLBARS_INSIDE_INSET, SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_OUTSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, SELECTED_STATE_SET, SELECTED_WINDOW_FOCUSED_STATE_SET, SOUND_EFFECTS_ENABLED, STATUS_BAR_HIDDEN, STATUS_BAR_VISIBLE, SYSTEM_UI_FLAG_FULLSCREEN, SYSTEM_UI_FLAG_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN, SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_STABLE, SYSTEM_UI_FLAG_LOW_PROFILE, SYSTEM_UI_FLAG_VISIBLE, SYSTEM_UI_LAYOUT_FLAGS, TEXT_ALIGNMENT_INHERIT, TEXT_ALIGNMENT_RESOLVED_DEFAULT, TRANSLATION_X, TRANSLATION_Y, VIEW_LOG_TAG, VISIBLE, WINDOW_FOCUSED_STATE_SET, X, Y

Constructor Summary

Constructors
Constructor and Description
`ZoomableView(android.content.Context context)`
`ZoomableView(android.content.Context context, android.util.AttributeSet attrs)`
`ZoomableView(android.content.Context context, android.util.AttributeSet attrs, int defStyle)`

Method Summary

Methods
Modifier and Type	Method and Description
`protected abstract DocumentWrapper`	`createDocumentWrapper()` Invoked by the constructor to create a wrapper to the data of the viewed document.
`boolean`	`fitView()` Reset the view so that the document is fitting the drawing area.
`float`	`getFocusX()`
`float`	`getFocusY()`
`float`	`getMaxScalingFactor()`
`float`	`getMinScalingFactor()`
`protected abstract float`	`getPreferredFocusX()` Replies the preferred position of the focus point.
`protected abstract float`	`getPreferredFocusY()` Replies the preferred position of the focus point.
`float`	`getScalingFactor()`
`float`	`getScalingFactorToFit()` Replies the scaling factor that may be used to fit the content of the document to the drawing area.
`float`	`getScalingSensitivity()`
`float`	`getViewportCenterX()` Replies the X coordinate of the center of the viewport (in screen coordinate).
`float`	`getViewportCenterY()` Replies the Y coordinate of the center of the viewport (in screen coordinate).
`boolean`	`isIgnoreRepaint()` Replies if the repaint requests are ignored or not.
`boolean`	`isMoveDirectionInverted()` Replies if the direction of moving is inverted.
`boolean`	`isXAxisInverted()`
`boolean`	`isYAxisInverted()`
`float`	`logical2pixel_size(float l)`
`float`	`logical2pixel_x(float l)`
`float`	`logical2pixel_y(float l)`
`void`	`logical2pixel(Circle2f r)`
`void`	`logical2pixel(Ellipse2f e)`
`PathIterator2f`	`logical2pixel(PathIterator2f p)`
`void`	`logical2pixel(Point2f p)`
`void`	`logical2pixel(Rectangle2f r)`
`void`	`logical2pixel(RoundRectangle2f r)`
`void`	`logical2pixel(Segment2f s)`
`Shape2f`	`logical2pixel(Shape2f s)`
`protected void`	`onClick(PointerEvent e)` Invoked when a short-click is detected.
`void`	`onDraw(android.graphics.Canvas canvas)`
`protected abstract void`	`onDrawView(android.graphics.Canvas canvas, float scaleFactor, CenteringTransform centeringTransform)` Invoked to paint the view after it is translated and scaled.
`protected void`	`onLongClick(PointerEvent e)` Invoked when a long-click is detected.
`protected void`	`onPointerDragged(PointerEvent e)` Invoked when the pointer is moved with a button down.
`protected void`	`onPointerPressed(PointerEvent e)` Invoked when the a touch-down event is detected.
`protected void`	`onPointerReleased(PointerEvent e)` Invoked when the a touch-up event is detected.
`boolean`	`onScale(float focusX, float focusY, float requestedScaleFactor)` Invoked when the view must be scaled.
`protected void`	`onSizeChanged(int w, int h, int oldw, int oldh)`
`boolean`	`onTouchEvent(android.view.MotionEvent ev)`
`protected void`	`onUpdateViewParameters()` Update any viewing parameter according to the current value of the focus point and the scaling factor.
`float`	`pixel2logical_size(float l)`
`float`	`pixel2logical_x(float l)`
`float`	`pixel2logical_y(float l)`
`void`	`pixel2logical(Circle2f r)`
`void`	`pixel2logical(Ellipse2f e)`
`PathIterator2f`	`pixel2logical(PathIterator2f p)`
`void`	`pixel2logical(Point2f p)`
`void`	`pixel2logical(Rectangle2f r)`
`void`	`pixel2logical(RoundRectangle2f r)`
`void`	`pixel2logical(Segment2f s)`
`Shape2f`	`pixel2logical(Shape2f s)`
`void`	`repaint()` Invalidate this view wherever this function is invoked.
`void`	`repaint(float x, float y, float width, float height)` Invalidate this view wherever this function is invoked.
`void`	`repaint(android.graphics.Rect r)` Invalidate this view wherever this function is invoked.
`void`	`repaint(Rectangle2f r)` Invalidate this view wherever this function is invoked.
`void`	`repaint(android.graphics.RectF r)` Invalidate this view wherever this function is invoked.
`boolean`	`resetView()` Reset the view to the default configuration.
`void`	`setFocusPoint(float x, float y)` Set the position of the focus point.
`void`	`setIgnoreRepaint(boolean ignore)` Set if the repaint requests are ignored or not.
`void`	`setMaxScalingFactor(float factor)` Set the maximal scaling factor allowing in the view
`void`	`setMinScalingFactor(float factor)` Set the minimal scaling factor allowing in the view
`void`	`setMoveDirectionInverted(boolean invert)` Set if the direction of moving is inverted.
`void`	`setOnClickListener(android.view.View.OnClickListener l)`
`void`	`setOnLongClickListener(android.view.View.OnLongClickListener l)`
`boolean`	`setScalingFactor(float factor)` Set the scaling factor.
`protected boolean`	`setScalingFactorAndFocus(float scalingX, float scalingY, float factor)` Set the scaling factor.
`void`	`setScalingFactorForPixelRatio(float ratio)` Change the scaling factor to have the specified ratio between 1 pixel and 1 unit in the document.
`void`	`setScalingSensitivity(float sensivility)` Replies the sensivility of the `zoomIn()` and `zoomOut()` actions.
`void`	`setXAxisInverted(boolean invert)` Invert or not the X axis.
`void`	`setYAxisInverted(boolean invert)` Invert or not the Y axis.
`void`	`toast(int message, boolean isLong)` Show a toast message.
`void`	`toast(String message, boolean isLong)` Show a toast message.
`void`	`translateFocusPoint(float dx, float dy)` Translate the position of the focus point.
`void`	`zoomIn()` Zoom the view in.
`void`	`zoomOut()` Zoom the view out.

Methods inherited from class android.view.View
addChildrenForAccessibility, addFocusables, addFocusables, addOnAttachStateChangeListener, addOnLayoutChangeListener, addTouchables, animate, announceForAccessibility, awakenScrollBars, awakenScrollBars, awakenScrollBars, bringToFront, buildDrawingCache, buildDrawingCache, buildLayer, callOnClick, cancelLongPress, canScrollHorizontally, canScrollVertically, checkInputConnectionProxy, clearAnimation, clearFocus, combineMeasuredStates, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeScroll, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createAccessibilityNodeInfo, createContextMenu, destroyDrawingCache, dispatchConfigurationChanged, dispatchDisplayHint, dispatchDragEvent, dispatchDraw, dispatchGenericFocusedEvent, dispatchGenericMotionEvent, dispatchGenericPointerEvent, dispatchHoverEvent, dispatchKeyEvent, dispatchKeyEventPreIme, dispatchKeyShortcutEvent, dispatchPopulateAccessibilityEvent, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchSetActivated, dispatchSetPressed, dispatchSetSelected, dispatchSystemUiVisibilityChanged, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchVisibilityChanged, dispatchWindowFocusChanged, dispatchWindowSystemUiVisiblityChanged, dispatchWindowVisibilityChanged, draw, drawableStateChanged, findFocus, findViewById, findViewsWithText, findViewWithTag, fitSystemWindows, focusSearch, forceLayout, getAccessibilityNodeProvider, getAlpha, getAnimation, getApplicationWindowToken, getBackground, getBaseline, getBottom, getBottomFadingEdgeStrength, getBottomPaddingOffset, getCameraDistance, getContentDescription, getContext, getContextMenuInfo, getDefaultSize, getDrawableState, getDrawingCache, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getFilterTouchesWhenObscured, getFitsSystemWindows, getFocusables, getFocusedRect, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHeight, getHitRect, getHorizontalFadingEdgeLength, getHorizontalScrollbarHeight, getId, getImportantForAccessibility, getKeepScreenOn, getKeyDispatcherState, getLayerType, getLayoutParams, getLeft, getLeftFadingEdgeStrength, getLeftPaddingOffset, getLocalVisibleRect, getLocationInWindow, getLocationOnScreen, getMatrix, getMeasuredHeight, getMeasuredHeightAndState, getMeasuredState, getMeasuredWidth, getMeasuredWidthAndState, getMinimumHeight, getMinimumWidth, getNextFocusDownId, getNextFocusForwardId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getOverScrollMode, getPaddingBottom, getPaddingLeft, getPaddingRight, getPaddingTop, getParent, getParentForAccessibility, getPivotX, getPivotY, getResources, getRight, getRightFadingEdgeStrength, getRightPaddingOffset, getRootView, getRotation, getRotationX, getRotationY, getScaleX, getScaleY, getScrollBarDefaultDelayBeforeFade, getScrollBarFadeDuration, getScrollBarSize, getScrollBarStyle, getScrollX, getScrollY, getSolidColor, getSuggestedMinimumHeight, getSuggestedMinimumWidth, getSystemUiVisibility, getTag, getTag, getTop, getTopFadingEdgeStrength, getTopPaddingOffset, getTouchables, getTouchDelegate, getTranslationX, getTranslationY, getVerticalFadingEdgeLength, getVerticalScrollbarPosition, getVerticalScrollbarWidth, getViewTreeObserver, getVisibility, getWidth, getWindowAttachCount, getWindowSystemUiVisibility, getWindowToken, getWindowVisibility, getWindowVisibleDisplayFrame, getX, getY, hasFocus, hasFocusable, hasOnClickListeners, hasOverlappingRendering, hasTransientState, hasWindowFocus, inflate, initializeFadingEdge, initializeScrollbars, invalidate, invalidate, invalidate, invalidateDrawable, isActivated, isClickable, isDirty, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isHapticFeedbackEnabled, isHardwareAccelerated, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isHovered, isInEditMode, isInTouchMode, isLayoutRequested, isLongClickable, isOpaque, isPaddingOffsetRequired, isPressed, isSaveEnabled, isSaveFromParentEnabled, isScrollbarFadingEnabled, isScrollContainer, isSelected, isShown, isSoundEffectsEnabled, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, jumpDrawablesToCurrentState, layout, measure, mergeDrawableStates, offsetLeftAndRight, offsetTopAndBottom, onAnimationEnd, onAnimationStart, onAttachedToWindow, onCheckIsTextEditor, onConfigurationChanged, onCreateContextMenu, onCreateDrawableState, onCreateInputConnection, onDetachedFromWindow, onDisplayHint, onDragEvent, onDrawScrollBars, onFilterTouchEventForSecurity, onFinishInflate, onFinishTemporaryDetach, onFocusChanged, onGenericMotionEvent, onHoverChanged, onHoverEvent, onInitializeAccessibilityEvent, onInitializeAccessibilityNodeInfo, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyPreIme, onKeyShortcut, onKeyUp, onLayout, onMeasure, onOverScrolled, onPopulateAccessibilityEvent, onRestoreInstanceState, onSaveInstanceState, onScreenStateChanged, onScrollChanged, onSetAlpha, onStartTemporaryDetach, onTrackballEvent, onVisibilityChanged, onWindowFocusChanged, onWindowSystemUiVisibilityChanged, onWindowVisibilityChanged, overScrollBy, performAccessibilityAction, performClick, performHapticFeedback, performHapticFeedback, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, postInvalidateOnAnimation, postInvalidateOnAnimation, postOnAnimation, postOnAnimationDelayed, refreshDrawableState, removeCallbacks, removeOnAttachStateChangeListener, removeOnLayoutChangeListener, requestFitSystemWindows, requestFocus, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestRectangleOnScreen, requestRectangleOnScreen, resolveSize, resolveSizeAndState, restoreHierarchyState, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, sendAccessibilityEvent, sendAccessibilityEventUnchecked, setAccessibilityDelegate, setActivated, setAlpha, setAnimation, setBackground, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setBottom, setCameraDistance, setClickable, setContentDescription, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setEnabled, setFadingEdgeLength, setFilterTouchesWhenObscured, setFitsSystemWindows, setFocusable, setFocusableInTouchMode, setHapticFeedbackEnabled, setHasTransientState, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setHovered, setId, setImportantForAccessibility, setKeepScreenOn, setLayerType, setLayoutParams, setLeft, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNextFocusDownId, setNextFocusForwardId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnCreateContextMenuListener, setOnDragListener, setOnFocusChangeListener, setOnGenericMotionListener, setOnHoverListener, setOnKeyListener, setOnSystemUiVisibilityChangeListener, setOnTouchListener, setOverScrollMode, setPadding, setPivotX, setPivotY, setPressed, setRight, setRotation, setRotationX, setRotationY, setSaveEnabled, setSaveFromParentEnabled, setScaleX, setScaleY, setScrollBarDefaultDelayBeforeFade, setScrollBarFadeDuration, setScrollbarFadingEnabled, setScrollBarSize, setScrollBarStyle, setScrollContainer, setScrollX, setScrollY, setSelected, setSoundEffectsEnabled, setSystemUiVisibility, setTag, setTag, setTop, setTouchDelegate, setTranslationX, setTranslationY, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVerticalScrollbarPosition, setVisibility, setWillNotCacheDrawing, setWillNotDraw, setX, setY, showContextMenu, startActionMode, startAnimation, startDrag, unscheduleDrawable, unscheduleDrawable, verifyDrawable, willNotCacheDrawing, willNotDraw

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

- Constructor Detail
  - ZoomableView
```
public ZoomableView(android.content.Context context)
```
    Parameters:
    context - is the droid context of the view.
  - ZoomableView
```
public ZoomableView(android.content.Context context,
            android.util.AttributeSet attrs)
```
    Parameters:
    context - is the droid context of the view.
    attrs - are the attributes of the view.
  - ZoomableView
```
public ZoomableView(android.content.Context context,
            android.util.AttributeSet attrs,
            int defStyle)
```
    Parameters:
    context - is the droid context of the view.
    attrs - are the attributes of the view.
    defStyle - is the style of the view.
- Method Detail
  - createDocumentWrapper
```
protected abstract DocumentWrapper createDocumentWrapper()
```
    Invoked by the constructor to create a wrapper to the data of the viewed document. If there is no wrapper, several functions of ZoomableView will not work.
    
    Returns:
    the wrapper or null.
  - isXAxisInverted
```
public final boolean isXAxisInverted()
```
    Specified by:
    
    isXAxisInverted in interface ZoomableContext
  - isYAxisInverted
```
public final boolean isYAxisInverted()
```
    Specified by:
    
    isYAxisInverted in interface ZoomableContext
  - setXAxisInverted
```
public final void setXAxisInverted(boolean invert)
```
    Invert or not the X axis.
    If the X axis is inverted, the positives are to the left; otherwise they are to the right (default UI standard).
    
    Parameters:
    invert -
  - setYAxisInverted
```
public final void setYAxisInverted(boolean invert)
```
    Invert or not the Y axis.
    If the Y axis is inverted, the positives are to the left; otherwise they are to the right (default UI standard).
    
    Parameters:
    invert -
  - setOnLongClickListener
```
public final void setOnLongClickListener(android.view.View.OnLongClickListener l)
```
    Overrides:
    
    setOnLongClickListener in class android.view.View
  - setOnClickListener
```
public final void setOnClickListener(android.view.View.OnClickListener l)
```
    Overrides:
    
    setOnClickListener in class android.view.View
  - setIgnoreRepaint
```
public final void setIgnoreRepaint(boolean ignore)
```
    Set if the repaint requests are ignored or not.
    
    Parameters:
    ignore -
  - isIgnoreRepaint
```
public final boolean isIgnoreRepaint()
```
    Replies if the repaint requests are ignored or not.
    
    Returns:
    true if the repaint requests are ignored; false if not.
  - repaint
```
public final void repaint()
```
    Invalidate this view wherever this function is invoked. If the current thread is the UI-thread, View.invalidate() is invoked. If not, View.postInvalidate() is invoked.
    If isIgnoreRepaint() replies false, this function does nothing.
    
    See Also:
    isIgnoreRepaint()
  - repaint
```
public final void repaint(float x,
           float y,
           float width,
           float height)
```
    Invalidate this view wherever this function is invoked. If the current thread is the UI-thread, View.invalidate() is invoked. If not, View.postInvalidate() is invoked.
    If isIgnoreRepaint() replies false, this function does nothing.
    
    Parameters:
    x -
    y -
    width -
    height -
    See Also:
    isIgnoreRepaint()
  - repaint
```
public final void repaint(Rectangle2f r)
```
    Invalidate this view wherever this function is invoked. If the current thread is the UI-thread, View.invalidate() is invoked. If not, View.postInvalidate() is invoked.
    If isIgnoreRepaint() replies false, this function does nothing.
    
    Parameters:
    r -
    See Also:
    isIgnoreRepaint()
  - repaint
```
public final void repaint(android.graphics.Rect r)
```
    Invalidate this view wherever this function is invoked. If the current thread is the UI-thread, View.invalidate() is invoked. If not, View.postInvalidate() is invoked.
    If isIgnoreRepaint() replies false, this function does nothing.
    
    Parameters:
    r -
    See Also:
    isIgnoreRepaint()
  - repaint
```
public final void repaint(android.graphics.RectF r)
```
    Invalidate this view wherever this function is invoked. If the current thread is the UI-thread, View.invalidate() is invoked. If not, View.postInvalidate() is invoked.
    If isIgnoreRepaint() replies false, this function does nothing.
    
    Parameters:
    r -
    See Also:
    isIgnoreRepaint()
  - isMoveDirectionInverted
```
public final boolean isMoveDirectionInverted()
```
    Replies if the direction of moving is inverted.
    
    Returns:
    true if the direction of moving is inverted; otherwise false.
  - setMoveDirectionInverted
```
public final void setMoveDirectionInverted(boolean invert)
```
    Set if the direction of moving is inverted.
    
    Parameters:
    invert - is true if the direction of moving is inverted; otherwise false.
  - logical2pixel_size
```
public final float logical2pixel_size(float l)
```
    Specified by:
    
    logical2pixel_size in interface ZoomableContext
  - logical2pixel_x
```
public final float logical2pixel_x(float l)
```
    Specified by:
    
    logical2pixel_x in interface ZoomableContext
  - logical2pixel_y
```
public final float logical2pixel_y(float l)
```
    Specified by:
    
    logical2pixel_y in interface ZoomableContext
  - pixel2logical_size
```
public final float pixel2logical_size(float l)
```
    Specified by:
    
    pixel2logical_size in interface ZoomableContext
  - pixel2logical_x
```
public final float pixel2logical_x(float l)
```
    Specified by:
    
    pixel2logical_x in interface ZoomableContext
  - pixel2logical_y
```
public final float pixel2logical_y(float l)
```
    Specified by:
    
    pixel2logical_y in interface ZoomableContext
  - logical2pixel
```
public PathIterator2f logical2pixel(PathIterator2f p)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public PathIterator2f pixel2logical(PathIterator2f p)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(Segment2f s)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(Segment2f s)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(RoundRectangle2f r)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(RoundRectangle2f r)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(Point2f p)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(Point2f p)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(Ellipse2f e)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(Ellipse2f e)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(Circle2f r)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(Circle2f r)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public void logical2pixel(Rectangle2f r)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public void pixel2logical(Rectangle2f r)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - logical2pixel
```
public Shape2f logical2pixel(Shape2f s)
```
    Specified by:
    
    logical2pixel in interface ZoomableContext
  - pixel2logical
```
public Shape2f pixel2logical(Shape2f s)
```
    Specified by:
    
    pixel2logical in interface ZoomableContext
  - getScalingSensitivity
```
public final float getScalingSensitivity()
```
    Specified by:
    
    getScalingSensitivity in interface ZoomableContext
  - setScalingSensitivity
```
public final void setScalingSensitivity(float sensivility)
```
    Replies the sensivility of the zoomIn() and zoomOut() actions.
    
    Parameters:
    sensivility -
  - getViewportCenterX
```
public final float getViewportCenterX()
```
    Replies the X coordinate of the center of the viewport (in screen coordinate).
    
    Returns:
    the center of the viewport.
  - getViewportCenterY
```
public final float getViewportCenterY()
```
    Replies the Y coordinate of the center of the viewport (in screen coordinate).
    
    Returns:
    the center of the viewport.
  - getFocusX
```
public final float getFocusX()
```
    Specified by:
    
    getFocusX in interface ZoomableContext
  - getFocusY
```
public final float getFocusY()
```
    Specified by:
    
    getFocusY in interface ZoomableContext
  - getScalingFactor
```
public final float getScalingFactor()
```
    Specified by:
    
    getScalingFactor in interface ZoomableContext
  - setScalingFactor
```
public final boolean setScalingFactor(float factor)
```
    Set the scaling factor.
    
    Parameters:
    factor - is the scaling factor.
    
    Returns:
    true if the scaling factor has changed; otherwise false.
  - setScalingFactorForPixelRatio
```
public void setScalingFactorForPixelRatio(float ratio)
```
    Change the scaling factor to have the specified ratio between 1 pixel and 1 unit in the document.
    Each unit from the displayed document will have the same graphical size as the amount of pixels specified by the ratio.
    
    Parameters:
    ratio -
  - setScalingFactorAndFocus
```
protected final boolean setScalingFactorAndFocus(float scalingX,
                               float scalingY,
                               float factor)
```
    Set the scaling factor. This function does not repaint.
    
    Parameters:
    scalingX - is the coordinate of the point (on the screen) where the focus occurs.
    scalingY - is the coordinate of the point (on the screen) where the focus occurs.
    factor - is the scaling factor.
    
    Returns:
    true if the scaling factor or the focus point has changed; otherwise false.
  - zoomIn
```
public final void zoomIn()
```
    Zoom the view in.
  - zoomOut
```
public final void zoomOut()
```
    Zoom the view out.
  - getMaxScalingFactor
```
public final float getMaxScalingFactor()
```
    Specified by:
    
    getMaxScalingFactor in interface ZoomableContext
  - setMaxScalingFactor
```
public final void setMaxScalingFactor(float factor)
```
    Set the maximal scaling factor allowing in the view
    
    Parameters:
    factor - is the maximal scaling factor.
  - getMinScalingFactor
```
public final float getMinScalingFactor()
```
    Specified by:
    
    getMinScalingFactor in interface ZoomableContext
  - setMinScalingFactor
```
public final void setMinScalingFactor(float factor)
```
    Set the minimal scaling factor allowing in the view
    
    Parameters:
    factor - is the minimal scaling factor.
  - setFocusPoint
```
public final void setFocusPoint(float x,
                 float y)
```
    Set the position of the focus point.
    
    Parameters:
    x -
    y -
  - translateFocusPoint
```
public final void translateFocusPoint(float dx,
                       float dy)
```
    Translate the position of the focus point.
    
    Parameters:
    dx -
    dy -
  - onUpdateViewParameters
```
protected void onUpdateViewParameters()
```
    Update any viewing parameter according to the current value of the focus point and the scaling factor.
    This function is invoked when the coordinates of the focus point or the scaling factor has been changed to ensure that all the drawing attributes are properly set.
  - getPreferredFocusX
```
protected abstract float getPreferredFocusX()
```
    Replies the preferred position of the focus point.
    
    Returns:
    the preferred position of the focus point.
  - getPreferredFocusY
```
protected abstract float getPreferredFocusY()
```
    Replies the preferred position of the focus point.
    
    Returns:
    the preferred position of the focus point.
  - resetView
```
public final boolean resetView()
```
    Reset the view to the default configuration.
    
    Returns:
    true if the view has changed; false otherwise.
  - getScalingFactorToFit
```
public float getScalingFactorToFit()
```
    Replies the scaling factor that may be used to fit the content of the document to the drawing area.
    If there is no wrapper replied by createDocumentWrapper(), this function replies 1.
    
    Returns:
    the scaling factor that permits to fit the document.
  - fitView
```
public final boolean fitView()
```
    Reset the view so that the document is fitting the drawing area.
    If there is no wrapper replied by createDocumentWrapper(), this function does the same as resetView().
    
    Returns:
    true if the view has changed; false otherwise.
  - onSizeChanged
```
protected void onSizeChanged(int w,
                 int h,
                 int oldw,
                 int oldh)
```
    Overrides:
    
    onSizeChanged in class android.view.View
  - onDraw
```
public final void onDraw(android.graphics.Canvas canvas)
```
    Overrides:
    
    onDraw in class android.view.View
  - onDrawView
```
protected abstract void onDrawView(android.graphics.Canvas canvas,
              float scaleFactor,
              CenteringTransform centeringTransform)
```
    Invoked to paint the view after it is translated and scaled.
    
    Parameters:
    canvas - is the canvas in which the view must be painted.
    scaleFactor - is the scaling factor to use for drawing.
    centeringTransform - is the transform to use to put the draws at the center of the view.
  - onTouchEvent
```
public final boolean onTouchEvent(android.view.MotionEvent ev)
```
    Overrides:
    
    onTouchEvent in class android.view.View
  - onPointerPressed
```
protected void onPointerPressed(PointerEvent e)
```
    Invoked when the a touch-down event is detected.
    
    Parameters:
    e -
  - onPointerReleased
```
protected void onPointerReleased(PointerEvent e)
```
    Invoked when the a touch-up event is detected.
    
    Parameters:
    e -
  - onPointerDragged
```
protected void onPointerDragged(PointerEvent e)
```
    Invoked when the pointer is moved with a button down.
    
    Parameters:
    e -
  - onLongClick
```
protected void onLongClick(PointerEvent e)
```
    Invoked when a long-click is detected.
    
    Parameters:
    e -
  - onClick
```
protected void onClick(PointerEvent e)
```
    Invoked when a short-click is detected.
    
    Parameters:
    e -
  - onScale
```
public boolean onScale(float focusX,
              float focusY,
              float requestedScaleFactor)
```
    Invoked when the view must be scaled.
    One of the border effect if this function replies true is that the view will be repaint.
    The default implementation of this function invokes setScalingFactorAndFocus(float, float, float).
    
    Parameters:
    focusX - is the position of the focal point on the screen.
    focusY - is the position of the focal point on the screen.
    requestedScaleFactor - is the new scale factor.
    
    Returns:
    Whether or not the detector should consider this event as handled. If an event was not handled, the detector will continue to accumulate movement until an event is handled. This can be useful if an application, for example, only wants to update scaling factors if the change is greater than 0.01.
    See Also:
    setScalingFactorAndFocus(float, float, float)
  - toast
```
public final void toast(String message,
         boolean isLong)
```
    Show a toast message.
    
    Parameters:
    message - is the message to display
    isLong - indicates if it is a long-time (true) or a short-time (false) message.
  - toast
```
public final void toast(int message,
         boolean isLong)
```
    Show a toast message.
    
    Parameters:
    message - is the message to display
    isLong - indicates if it is a long-time (true) or a short-time (false) message.

Class ZoomableView

Nested Class Summary

Nested classes/interfaces inherited from class android.view.View

Field Summary

Fields inherited from class android.view.View

Constructor Summary

Method Summary

Methods inherited from class android.view.View

Methods inherited from class java.lang.Object

Constructor Detail

ZoomableView

ZoomableView

ZoomableView

Method Detail

createDocumentWrapper

isXAxisInverted

isYAxisInverted

setXAxisInverted

setYAxisInverted

setOnLongClickListener

setOnClickListener

setIgnoreRepaint

isIgnoreRepaint

repaint

repaint

repaint

repaint

repaint

isMoveDirectionInverted

setMoveDirectionInverted

logical2pixel_size

logical2pixel_x

logical2pixel_y

pixel2logical_size

pixel2logical_x

pixel2logical_y

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

logical2pixel

pixel2logical

getScalingSensitivity

setScalingSensitivity

getViewportCenterX

getViewportCenterY

getFocusX

getFocusY

getScalingFactor

setScalingFactor

setScalingFactorForPixelRatio

setScalingFactorAndFocus

zoomIn

zoomOut

getMaxScalingFactor

setMaxScalingFactor

getMinScalingFactor

setMinScalingFactor

setFocusPoint

translateFocusPoint

onUpdateViewParameters

getPreferredFocusX

getPreferredFocusY

resetView

getScalingFactorToFit

fitView

onSizeChanged

onDraw

onDrawView

onTouchEvent