public override void draw(android.graphics.Canvas canvas)
{
if (mPicture != null)
{
android.graphics.Rect bounds = getBounds();
canvas.save();
canvas.clipRect(bounds);
canvas.translate(bounds.left, bounds.top);
canvas.drawPicture(mPicture);
canvas.restore();
}
}
public virtual void draw(android.graphics.Canvas canvas)
{
if (mDrawable == null)
{
return;
}
canvas.save(android.graphics.Canvas.MATRIX_SAVE_FLAG);
canvas.translate(mTranslationX, mTranslationY);
canvas.scale(mScaleX, mScaleY);
canvas.translate(-0.5f * getWidth(), -0.5f * getHeight());
mDrawable.setAlpha((int)Sharpen.Util.Round(mAlpha * 255f));
mDrawable.draw(canvas);
canvas.restore();
}
protected internal override void onDraw(android.graphics.Canvas canvas)
{
lock (this)
{
base.onDraw(canvas);
if (mThumb != null)
{
canvas.save();
// Translate the padding. For the x, we need to allow the thumb to
// draw in its extra space
canvas.translate(mPaddingLeft - mThumbOffset, mPaddingTop);
mThumb.draw(canvas);
canvas.restore();
}
}
}
/// <summary>Draw one child of this View Group.</summary>
/// <remarks>
/// Draw one child of this View Group. This method is responsible for getting
/// the canvas in the right state. This includes clipping, translating so
/// that the child's scrolled origin is at 0, 0, and applying any animation
/// transformations.
/// </remarks>
/// <param name="canvas">The canvas on which to draw the child</param>
/// <param name="child">Who to draw</param>
/// <param name="drawingTime">The time at which draw is occuring</param>
/// <returns>True if an invalidate() was issued</returns>
protected internal virtual bool drawChild(android.graphics.Canvas canvas, android.view.View
child, long drawingTime)
{
bool more = false;
int cl = child.mLeft;
int ct = child.mTop;
int cr = child.mRight;
int cb = child.mBottom;
bool childHasIdentityMatrix = child.hasIdentityMatrix();
int flags = mGroupFlags;
if ((flags & FLAG_CLEAR_TRANSFORMATION) == FLAG_CLEAR_TRANSFORMATION)
{
mChildTransformation.clear();
mGroupFlags &= ~FLAG_CLEAR_TRANSFORMATION;
}
android.view.animation.Transformation transformToApply = null;
android.view.animation.Transformation invalidationTransform;
android.view.animation.Animation a = child.getAnimation();
bool concatMatrix = false;
bool scalingRequired = false;
bool caching;
int layerType = mDrawLayers ? child.getLayerType() : LAYER_TYPE_NONE;
bool hardwareAccelerated = canvas.isHardwareAccelerated();
if ((flags & FLAG_CHILDREN_DRAWN_WITH_CACHE) == FLAG_CHILDREN_DRAWN_WITH_CACHE ||
(flags & FLAG_ALWAYS_DRAWN_WITH_CACHE) == FLAG_ALWAYS_DRAWN_WITH_CACHE)
{
caching = true;
if (mAttachInfo != null)
{
scalingRequired = mAttachInfo.mScalingRequired;
}
}
else
{
caching = (layerType != LAYER_TYPE_NONE) || hardwareAccelerated;
}
if (a != null)
{
bool initialized = a.isInitialized();
if (!initialized)
{
a.initialize(cr - cl, cb - ct, getWidth(), getHeight());
a.initializeInvalidateRegion(0, 0, cr - cl, cb - ct);
child.onAnimationStart();
}
more = a.getTransformation(drawingTime, mChildTransformation, scalingRequired ? mAttachInfo
.mApplicationScale : 1f);
if (scalingRequired && mAttachInfo.mApplicationScale != 1f)
{
if (mInvalidationTransformation == null)
{
mInvalidationTransformation = new android.view.animation.Transformation();
}
invalidationTransform = mInvalidationTransformation;
a.getTransformation(drawingTime, invalidationTransform, 1f);
}
else
{
invalidationTransform = mChildTransformation;
}
transformToApply = mChildTransformation;
concatMatrix = a.willChangeTransformationMatrix();
if (more)
{
if (!a.willChangeBounds())
{
if ((flags & (FLAG_OPTIMIZE_INVALIDATE | FLAG_ANIMATION_DONE)) == FLAG_OPTIMIZE_INVALIDATE)
{
mGroupFlags |= FLAG_INVALIDATE_REQUIRED;
}
else
{
if ((flags & FLAG_INVALIDATE_REQUIRED) == 0)
{
// The child need to draw an animation, potentially offscreen, so
// make sure we do not cancel invalidate requests
mPrivateFlags |= DRAW_ANIMATION;
invalidate(cl, ct, cr, cb);
}
}
}
else
{
if (mInvalidateRegion == null)
{
mInvalidateRegion = new android.graphics.RectF();
}
android.graphics.RectF region = mInvalidateRegion;
a.getInvalidateRegion(0, 0, cr - cl, cb - ct, region, invalidationTransform);
// The child need to draw an animation, potentially offscreen, so
// make sure we do not cancel invalidate requests
mPrivateFlags |= DRAW_ANIMATION;
int left = cl + (int)region.left;
int top = ct + (int)region.top;
invalidate(left, top, left + (int)(region.width() + .5f), top + (int)(region.height
() + .5f));
}
}
}
else
{
if ((flags & FLAG_SUPPORT_STATIC_TRANSFORMATIONS) == FLAG_SUPPORT_STATIC_TRANSFORMATIONS)
{
bool hasTransform = getChildStaticTransformation(child, mChildTransformation);
if (hasTransform)
{
int transformType = mChildTransformation.getTransformationType();
transformToApply = transformType != android.view.animation.Transformation.TYPE_IDENTITY
? mChildTransformation : null;
concatMatrix = (transformType & android.view.animation.Transformation.TYPE_MATRIX
) != 0;
}
}
}
concatMatrix |= !childHasIdentityMatrix;
// Sets the flag as early as possible to allow draw() implementations
// to call invalidate() successfully when doing animations
child.mPrivateFlags |= DRAWN;
if (!concatMatrix && canvas.quickReject(cl, ct, cr, cb, android.graphics.Canvas.EdgeType
.BW) && (child.mPrivateFlags & DRAW_ANIMATION) == 0)
{
return more;
}
float alpha = child.getAlpha();
// Bail out early if the view does not need to be drawn
if (alpha <= android.view.ViewConfiguration.ALPHA_THRESHOLD && (child.mPrivateFlags
& ALPHA_SET) == 0 && !(child is android.view.SurfaceView))
{
return more;
}
if (hardwareAccelerated)
{
// Clear INVALIDATED flag to allow invalidation to occur during rendering, but
// retain the flag's value temporarily in the mRecreateDisplayList flag
child.mRecreateDisplayList = (child.mPrivateFlags & INVALIDATED) == INVALIDATED;
child.mPrivateFlags &= ~INVALIDATED;
}
child.computeScroll();
int sx = child.mScrollX;
int sy = child.mScrollY;
android.view.DisplayList displayList = null;
android.graphics.Bitmap cache = null;
bool hasDisplayList = false;
if (caching)
{
if (!hardwareAccelerated)
{
if (layerType != LAYER_TYPE_NONE)
{
layerType = LAYER_TYPE_SOFTWARE;
child.buildDrawingCache(true);
}
cache = child.getDrawingCache(true);
}
else
{
switch (layerType)
{
case LAYER_TYPE_SOFTWARE:
{
child.buildDrawingCache(true);
cache = child.getDrawingCache(true);
break;
}
case LAYER_TYPE_NONE:
{
// Delay getting the display list until animation-driven alpha values are
// set up and possibly passed on to the view
hasDisplayList = child.canHaveDisplayList();
break;
}
}
}
}
bool hasNoCache = cache == null || hasDisplayList;
bool offsetForScroll = cache == null && !hasDisplayList && layerType != LAYER_TYPE_HARDWARE;
int restoreTo = canvas.save();
if (offsetForScroll)
{
canvas.translate(cl - sx, ct - sy);
}
else
{
canvas.translate(cl, ct);
if (scalingRequired)
{
// mAttachInfo cannot be null, otherwise scalingRequired == false
float scale = 1.0f / mAttachInfo.mApplicationScale;
canvas.scale(scale, scale);
}
}
if (transformToApply != null || alpha < 1.0f || !child.hasIdentityMatrix())
{
if (transformToApply != null || !childHasIdentityMatrix)
{
int transX = 0;
int transY = 0;
if (offsetForScroll)
{
transX = -sx;
transY = -sy;
}
if (transformToApply != null)
{
if (concatMatrix)
{
// Undo the scroll translation, apply the transformation matrix,
// then redo the scroll translate to get the correct result.
canvas.translate(-transX, -transY);
canvas.concat(transformToApply.getMatrix());
canvas.translate(transX, transY);
mGroupFlags |= FLAG_CLEAR_TRANSFORMATION;
}
float transformAlpha = transformToApply.getAlpha();
if (transformAlpha < 1.0f)
{
alpha *= transformToApply.getAlpha();
mGroupFlags |= FLAG_CLEAR_TRANSFORMATION;
}
}
if (!childHasIdentityMatrix)
{
canvas.translate(-transX, -transY);
canvas.concat(child.getMatrix());
canvas.translate(transX, transY);
}
}
if (alpha < 1.0f)
{
mGroupFlags |= FLAG_CLEAR_TRANSFORMATION;
if (hasNoCache)
{
int multipliedAlpha = (int)(255 * alpha);
if (!child.onSetAlpha(multipliedAlpha))
{
int layerFlags = android.graphics.Canvas.HAS_ALPHA_LAYER_SAVE_FLAG;
if ((flags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN || layerType != LAYER_TYPE_NONE)
{
layerFlags |= android.graphics.Canvas.CLIP_TO_LAYER_SAVE_FLAG;
}
if (layerType == LAYER_TYPE_NONE)
{
int scrollX = hasDisplayList ? 0 : sx;
int scrollY = hasDisplayList ? 0 : sy;
canvas.saveLayerAlpha(scrollX, scrollY, scrollX + cr - cl, scrollY + cb - ct, multipliedAlpha
, layerFlags);
}
}
else
{
// Alpha is handled by the child directly, clobber the layer's alpha
child.mPrivateFlags |= ALPHA_SET;
}
}
}
}
else
{
if ((child.mPrivateFlags & ALPHA_SET) == ALPHA_SET)
{
child.onSetAlpha(255);
child.mPrivateFlags &= ~ALPHA_SET;
}
}
if ((flags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN)
{
if (offsetForScroll)
{
canvas.clipRect(sx, sy, sx + (cr - cl), sy + (cb - ct));
}
else
{
if (!scalingRequired || cache == null)
{
canvas.clipRect(0, 0, cr - cl, cb - ct);
}
else
{
canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight());
}
}
}
if (hasDisplayList)
{
displayList = child.getDisplayList();
if (!displayList.isValid())
{
// Uncommon, but possible. If a view is removed from the hierarchy during the call
// to getDisplayList(), the display list will be marked invalid and we should not
// try to use it again.
displayList = null;
hasDisplayList = false;
}
}
if (hasNoCache)
{
bool layerRendered = false;
if (layerType == LAYER_TYPE_HARDWARE)
{
android.view.HardwareLayer layer = child.getHardwareLayer();
if (layer != null && layer.isValid())
{
child.mLayerPaint.setAlpha((int)(alpha * 255));
((android.view.HardwareCanvas)canvas).drawHardwareLayer(layer, 0, 0, child.mLayerPaint
);
layerRendered = true;
}
else
{
int scrollX = hasDisplayList ? 0 : sx;
int scrollY = hasDisplayList ? 0 : sy;
canvas.saveLayer(scrollX, scrollY, scrollX + cr - cl, scrollY + cb - ct, child.mLayerPaint
, android.graphics.Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | android.graphics.Canvas.CLIP_TO_LAYER_SAVE_FLAG
);
}
}
if (!layerRendered)
{
if (!hasDisplayList)
{
// Fast path for layouts with no backgrounds
if ((child.mPrivateFlags & SKIP_DRAW) == SKIP_DRAW)
{
child.mPrivateFlags &= ~DIRTY_MASK;
child.dispatchDraw(canvas);
}
else
{
child.draw(canvas);
}
}
else
{
child.mPrivateFlags &= ~DIRTY_MASK;
((android.view.HardwareCanvas)canvas).drawDisplayList(displayList, cr - cl, cb -
ct, null);
}
}
}
else
{
if (cache != null)
{
child.mPrivateFlags &= ~DIRTY_MASK;
android.graphics.Paint cachePaint;
if (layerType == LAYER_TYPE_NONE)
{
cachePaint = mCachePaint;
if (alpha < 1.0f)
{
cachePaint.setAlpha((int)(alpha * 255));
mGroupFlags |= FLAG_ALPHA_LOWER_THAN_ONE;
}
else
{
if ((flags & FLAG_ALPHA_LOWER_THAN_ONE) == FLAG_ALPHA_LOWER_THAN_ONE)
{
cachePaint.setAlpha(255);
mGroupFlags &= ~FLAG_ALPHA_LOWER_THAN_ONE;
}
}
}
else
{
cachePaint = child.mLayerPaint;
cachePaint.setAlpha((int)(alpha * 255));
}
canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint);
}
}
canvas.restoreToCount(restoreTo);
if (a != null && !more)
{
if (!hardwareAccelerated && !a.getFillAfter())
{
child.onSetAlpha(255);
}
finishAnimatingView(child, a);
}
if (more && hardwareAccelerated)
{
// invalidation is the trigger to recreate display lists, so if we're using
// display lists to render, force an invalidate to allow the animation to
// continue drawing another frame
invalidate(true);
if (a.hasAlpha() && (child.mPrivateFlags & ALPHA_SET) == ALPHA_SET)
{
// alpha animations should cause the child to recreate its display list
child.invalidate(true);
}
}
child.mRecreateDisplayList = false;
return more;
}
public override void draw(android.graphics.Canvas canvas)
{
android.graphics.Rect r = getBounds();
android.graphics.Paint paint = mShapeState.mPaint;
int prevAlpha = paint.getAlpha();
paint.setAlpha(modulateAlpha(prevAlpha, mShapeState.mAlpha));
if (mShapeState.mShape != null)
{
// need the save both for the translate, and for the (unknown) Shape
int count = canvas.save();
canvas.translate(r.left, r.top);
onDraw(mShapeState.mShape, canvas, paint);
canvas.restoreToCount(count);
}
else
{
canvas.drawRect(r, paint);
}
// restore
paint.setAlpha(prevAlpha);
}
/// <summary>Draw this object to the canvas using the properties defined in this class.
/// </summary>
/// <remarks>Draw this object to the canvas using the properties defined in this class.
/// </remarks>
/// <param name="canvas">canvas to draw into</param>
public virtual void draw(android.graphics.Canvas canvas)
{
float threshold = 1.0f / 256.0f;
// contribution less than 1 LSB of RGB byte
if (mAlpha <= threshold)
{
// don't bother if it won't show up
return;
}
canvas.save(android.graphics.Canvas.MATRIX_SAVE_FLAG);
canvas.translate(mX, mY);
canvas.scale(mScaleX, mScaleY);
canvas.translate(-0.5f * getWidth(), -0.5f * getHeight());
mDrawable.setAlpha((int)Sharpen.Util.Round(mAlpha * 255f));
mDrawable.draw(canvas);
canvas.restore();
}
public override void draw(android.graphics.Canvas canvas)
{
base.draw(canvas);
if (mEdgeGlowLeft != null)
{
int scrollX = mScrollX;
if (!mEdgeGlowLeft.isFinished())
{
int restoreCount = canvas.save();
int height = getHeight() - mPaddingTop - mPaddingBottom;
canvas.rotate(270);
canvas.translate(-height + mPaddingTop, System.Math.Min(0, scrollX));
mEdgeGlowLeft.setSize(height, getWidth());
if (mEdgeGlowLeft.draw(canvas))
{
invalidate();
}
canvas.restoreToCount(restoreCount);
}
if (!mEdgeGlowRight.isFinished())
{
int restoreCount = canvas.save();
int width = getWidth();
int height = getHeight() - mPaddingTop - mPaddingBottom;
canvas.rotate(90);
canvas.translate(-mPaddingTop, -(System.Math.Max(getScrollRange(), scrollX) + width
));
mEdgeGlowRight.setSize(height, width);
if (mEdgeGlowRight.draw(canvas))
{
invalidate();
}
canvas.restoreToCount(restoreCount);
}
}
}
public override void draw(android.graphics.Canvas canvas)
{
base.draw(canvas);
if (mEdgeGlowTop != null)
{
int scrollY = mScrollY;
if (!mEdgeGlowTop.isFinished())
{
int restoreCount = canvas.save();
int width = getWidth() - mPaddingLeft - mPaddingRight;
canvas.translate(mPaddingLeft, System.Math.Min(0, scrollY));
mEdgeGlowTop.setSize(width, getHeight());
if (mEdgeGlowTop.draw(canvas))
{
invalidate();
}
canvas.restoreToCount(restoreCount);
}
if (!mEdgeGlowBottom.isFinished())
{
int restoreCount = canvas.save();
int width = getWidth() - mPaddingLeft - mPaddingRight;
int height = getHeight();
canvas.translate(-width + mPaddingLeft, System.Math.Max(getScrollRange(), scrollY
) + height);
canvas.rotate(180, width, 0);
mEdgeGlowBottom.setSize(width, height);
if (mEdgeGlowBottom.draw(canvas))
{
invalidate();
}
canvas.restoreToCount(restoreCount);
}
}
}
public virtual void draw(android.graphics.Canvas canvas)
{
if (mState == STATE_NONE)
{
// No need to draw anything
return;
}
int y = mThumbY;
int viewWidth = mList.getWidth();
android.widget.FastScroller.ScrollFade scrollFade = mScrollFade;
int alpha = -1;
if (mState == STATE_EXIT)
{
alpha = scrollFade.getAlpha();
if (alpha < android.widget.FastScroller.ScrollFade.ALPHA_MAX / 2)
{
mThumbDrawable.setAlpha(alpha * 2);
}
int left = 0;
switch (mPosition)
{
case android.view.View.SCROLLBAR_POSITION_DEFAULT:
case android.view.View.SCROLLBAR_POSITION_RIGHT:
{
left = viewWidth - (mThumbW * alpha) / android.widget.FastScroller.ScrollFade.ALPHA_MAX;
break;
}
case android.view.View.SCROLLBAR_POSITION_LEFT:
{
left = -mThumbW + (mThumbW * alpha) / android.widget.FastScroller.ScrollFade.ALPHA_MAX;
break;
}
}
mThumbDrawable.setBounds(left, 0, left + mThumbW, mThumbH);
mChangedBounds = true;
}
if (mTrackDrawable != null)
{
android.graphics.Rect thumbBounds = mThumbDrawable.getBounds();
int left = thumbBounds.left;
int halfThumbHeight = (thumbBounds.bottom - thumbBounds.top) / 2;
int trackWidth = mTrackDrawable.getIntrinsicWidth();
int trackLeft = (left + mThumbW / 2) - trackWidth / 2;
mTrackDrawable.setBounds(trackLeft, halfThumbHeight, trackLeft + trackWidth, mList
.getHeight() - halfThumbHeight);
mTrackDrawable.draw(canvas);
}
canvas.translate(0, y);
mThumbDrawable.draw(canvas);
canvas.translate(0, -y);
// If user is dragging the scroll bar, draw the alphabet overlay
if (mState == STATE_DRAGGING && mDrawOverlay)
{
if (mOverlayPosition == OVERLAY_AT_THUMB)
{
int left = 0;
switch (mPosition)
{
case android.view.View.SCROLLBAR_POSITION_DEFAULT:
case android.view.View.SCROLLBAR_POSITION_RIGHT:
default:
{
left = System.Math.Max(0, mThumbDrawable.getBounds().left - mThumbW - mOverlaySize
);
break;
}
case android.view.View.SCROLLBAR_POSITION_LEFT:
{
left = System.Math.Min(mThumbDrawable.getBounds().right + mThumbW, mList.getWidth
() - mOverlaySize);
break;
}
}
int top = System.Math.Max(0, System.Math.Min(y + (mThumbH - mOverlaySize) / 2, mList
.getHeight() - mOverlaySize));
android.graphics.RectF pos = mOverlayPos;
pos.left = left;
pos.right = pos.left + mOverlaySize;
pos.top = top;
pos.bottom = pos.top + mOverlaySize;
if (mOverlayDrawable != null)
{
mOverlayDrawable.setBounds((int)pos.left, (int)pos.top, (int)pos.right, (int)pos.
bottom);
}
}
mOverlayDrawable.draw(canvas);
android.graphics.Paint paint = mPaint;
float descent = paint.descent();
android.graphics.RectF rectF = mOverlayPos;
android.graphics.Rect tmpRect = mTmpRect;
mOverlayDrawable.getPadding(tmpRect);
int hOff = (tmpRect.right - tmpRect.left) / 2;
int vOff = (tmpRect.bottom - tmpRect.top) / 2;
canvas.drawText(mSectionText, (int)(rectF.left + rectF.right) / 2 - hOff, (int)(rectF
.bottom + rectF.top) / 2 + mOverlaySize / 4 - descent - vOff, paint);
}
else
{
if (mState == STATE_EXIT)
{
if (alpha == 0)
{
// Done with exit
setState(STATE_NONE);
}
else
{
if (mTrackDrawable != null)
{
mList.invalidate(viewWidth - mThumbW, 0, viewWidth, mList.getHeight());
}
else
{
mList.invalidate(viewWidth - mThumbW, y, viewWidth, y + mThumbH);
}
}
}
}
}
protected internal override void onDraw(android.graphics.Canvas canvas)
{
base.onDraw(canvas);
if (mDrawable == null)
{
return;
}
// couldn't resolve the URI
if (mDrawableWidth == 0 || mDrawableHeight == 0)
{
return;
}
// nothing to draw (empty bounds)
if (mDrawMatrix == null && mPaddingTop == 0 && mPaddingLeft == 0)
{
mDrawable.draw(canvas);
}
else
{
int saveCount = canvas.getSaveCount();
canvas.save();
if (mCropToPadding)
{
int scrollX = mScrollX;
int scrollY = mScrollY;
canvas.clipRect(scrollX + mPaddingLeft, scrollY + mPaddingTop, scrollX + mRight -
mLeft - mPaddingRight, scrollY + mBottom - mTop - mPaddingBottom);
}
canvas.translate(mPaddingLeft, mPaddingTop);
if (mDrawMatrix != null)
{
canvas.concat(mDrawMatrix);
}
mDrawable.draw(canvas);
canvas.restoreToCount(saveCount);
}
}