Example usage for android.graphics Canvas save

List of usage examples for android.graphics Canvas save

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Introduction

In this page you can find the example usage for android.graphics Canvas save.

Prototype

public int save()

Source Link

Document

Saves the current matrix and clip onto a private stack.

Usage

From source file:android.car.ui.provider.CarDrawerLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final int height = getHeight();
    final boolean drawingContent = isContentView(child);
    int clipLeft = findContentView().getLeft();
    int clipRight = findContentView().getRight();
    final int baseAlpha = (mScrimColor & 0xff000000) >>> 24;

    final int restoreCount = canvas.save();
    if (drawingContent) {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View v = getChildAt(i);
            if (v == child || v.getVisibility() != VISIBLE || !hasOpaqueBackground(v) || !isDrawerView(v)
                    || v.getHeight() < height) {
                continue;
            }//  www  .java  2 s. co m

            if (checkDrawerViewAbsoluteGravity(v, Gravity.LEFT)) {
                final int vright = v.getRight();
                if (vright > clipLeft) {
                    clipLeft = vright;
                }
            } else {
                final int vleft = v.getLeft();
                if (vleft < clipRight) {
                    clipRight = vleft;
                }
            }
        }
        canvas.clipRect(clipLeft, 0, clipRight, getHeight());
    }
    final boolean result = super.drawChild(canvas, child, drawingTime);
    canvas.restoreToCount(restoreCount);

    if (drawingContent) {
        int scrimAlpha = SCRIM_ENABLED
                ? (int) (baseAlpha * Math.max(0, Math.min(1, onScreen())) * MAX_SCRIM_ALPHA)
                : 0;

        if (scrimAlpha > 0) {
            int color = scrimAlpha << 24 | (mScrimColor & 0xffffff);
            mScrimPaint.setColor(color);

            canvas.drawRect(clipLeft, 0, clipRight, getHeight(), mScrimPaint);

            canvas.drawRect(clipLeft - 1, 0, clipLeft, getHeight(), mEdgeHighlightPaint);
        }

        LayoutParams drawerLp = (LayoutParams) findDrawerView().getLayoutParams();
        if (mShadow != null && checkDrawerViewAbsoluteGravity(findDrawerView(), Gravity.LEFT)) {
            final int offScreen = (int) ((1 - drawerLp.onScreen) * findDrawerView().getWidth());
            final int drawerRight = getWidth() - drawerLp.getMarginEnd() - offScreen;
            final int shadowWidth = mShadow.getIntrinsicWidth();
            final float alpha = Math.max(0, Math.min((float) drawerRight / mDragger.getEdgeSize(), 1.f));
            mShadow.setBounds(drawerRight, child.getTop(), drawerRight + shadowWidth, child.getBottom());
            mShadow.setAlpha((int) (255 * alpha * alpha * alpha));
            mShadow.draw(canvas);
        } else if (mShadow != null && checkDrawerViewAbsoluteGravity(findDrawerView(), Gravity.RIGHT)) {
            final int onScreen = (int) (findDrawerView().getWidth() * drawerLp.onScreen);
            final int drawerLeft = drawerLp.getMarginStart() + getWidth() - onScreen;
            final int shadowWidth = mShadow.getIntrinsicWidth();
            final float alpha = Math.max(0, Math.min((float) onScreen / mDragger.getEdgeSize(), 1.f));
            canvas.save();
            canvas.translate(2 * drawerLeft - shadowWidth, 0);
            canvas.scale(-1.0f, 1.0f);
            mShadow.setBounds(drawerLeft - shadowWidth, child.getTop(), drawerLeft, child.getBottom());
            mShadow.setAlpha((int) (255 * alpha * alpha * alpha * alpha));
            mShadow.draw(canvas);
            canvas.restore();
        }
    }
    return result;
}

From source file:com.aidy.bottomdrawerlayout.BottomDrawerLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    Log.i(TAG, "drawChild()");
    final int width = getWidth();
    final boolean drawingContent = isContentView(child);
    int clipTop = 0;
    int clipBottom = getHeight();

    final int restoreCount = canvas.save();
    if (drawingContent) {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View v = getChildAt(i);
            if (v == child || v.getVisibility() != VISIBLE || !hasOpaqueBackground(v) || !isDrawerView(v)
                    || v.getWidth() < width) {
                Log.i(TAG, "drawChild() -- 0");
                continue;
            }/*from  w  w w . j av  a  2 s .  c  o m*/
            if (checkDrawerViewAbsoluteGravity(v, Gravity.TOP)) {
                final int vbottom = v.getBottom();
                if (vbottom > clipTop)
                    clipTop = vbottom;
            } else {
                final int vtop = v.getTop();
                if (vtop < clipBottom) {
                    clipBottom = vtop;
                }
            }
        }
        canvas.clipRect(0, clipTop, getWidth(), clipBottom);
    }
    final boolean result = super.drawChild(canvas, child, drawingTime);
    canvas.restoreToCount(restoreCount);

    if (mScrimOpacity > 0 && drawingContent) {
        Log.i(TAG, "drawChild() -- drawingContent");
        final int baseAlpha = (mScrimColor & 0xff000000) >>> 24;
        final int imag = (int) (baseAlpha * mScrimOpacity);
        final int color = imag << 24 | (mScrimColor & 0xffffff);
        mScrimPaint.setColor(color);
        canvas.drawRect(0, clipTop, getWidth(), clipBottom, mScrimPaint);
    } else if (mShadowBottom != null && checkDrawerViewAbsoluteGravity(child, Gravity.BOTTOM)) {
        Log.i(TAG, "drawChild() -- Gravity.BOTTOM");
        final int shadowHeight = mShadowBottom.getIntrinsicWidth();
        final int childTop = child.getTop();
        final int showing = getHeight() - childTop;
        final int drawerPeekDistance = mBottomDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) showing / drawerPeekDistance, 1.f));
        mShadowBottom.setBounds(child.getLeft(), childTop - shadowHeight, child.getRight(), childTop);
        mShadowBottom.setAlpha((int) (0xff * alpha));
        mShadowBottom.draw(canvas);
    }
    return result;
}

From source file:com.jude.easyrecyclerview.decoration.StickyHeaderDecoration.java

/**
 * {@inheritDoc}/*w  w  w  .j  a  v  a  2 s.  com*/
 */
@Override
public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
    if (parent.getAdapter() == null) {
        return;
    }

    final int count = parent.getChildCount();
    long previousHeaderId = -1;

    for (int layoutPos = 0; layoutPos < count; layoutPos++) {
        final View child = parent.getChildAt(layoutPos);
        int adapterPos = parent.getChildAdapterPosition(child);

        if (!mIncludeHeader) {
            if (parent.getAdapter() instanceof RecyclerArrayAdapter) {
                int headerCount = ((RecyclerArrayAdapter) parent.getAdapter()).getHeaderCount();
                int footerCount = ((RecyclerArrayAdapter) parent.getAdapter()).getFooterCount();
                int dataCount = ((RecyclerArrayAdapter) parent.getAdapter()).getCount();
                if (adapterPos < headerCount) {
                    continue;
                }
                if (adapterPos >= headerCount + dataCount) {
                    continue;
                }
                if (adapterPos >= headerCount) {
                    adapterPos -= headerCount;
                }

            }
        }

        if (adapterPos != RecyclerView.NO_POSITION && hasHeader(adapterPos)) {
            long headerId = mAdapter.getHeaderId(adapterPos);

            if (headerId != previousHeaderId) {
                previousHeaderId = headerId;
                View header = getHeader(parent, adapterPos).itemView;
                canvas.save();

                final int left = child.getLeft();
                final int top = getHeaderTop(parent, child, header, adapterPos, layoutPos);
                canvas.translate(left, top);

                header.setTranslationX(left);
                header.setTranslationY(top);
                header.draw(canvas);
                canvas.restore();
            }
        }
    }
}

From source file:com.youth.xframe.adapter.decoration.StickyHeaderDecoration.java

/**
 * {@inheritDoc}// ww  w.  j a v a 2 s. c  o m
 */
@Override
public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
    if (parent.getAdapter() == null) {
        return;
    }

    final int count = parent.getChildCount();
    long previousHeaderId = -1;

    for (int layoutPos = 0; layoutPos < count; layoutPos++) {
        final View child = parent.getChildAt(layoutPos);
        int adapterPos = parent.getChildAdapterPosition(child);

        if (!mIncludeHeader) {
            if (parent.getAdapter() instanceof XRecyclerViewAdapter) {
                int headerCount = ((XRecyclerViewAdapter) parent.getAdapter()).getHeaderCount();
                int footerCount = ((XRecyclerViewAdapter) parent.getAdapter()).getFooterCount();
                int dataCount = ((XRecyclerViewAdapter) parent.getAdapter()).getDataCount();
                if (adapterPos < headerCount) {
                    continue;
                }
                if (adapterPos >= headerCount + dataCount) {
                    continue;
                }
                if (adapterPos >= headerCount) {
                    adapterPos -= headerCount;
                }

            }
        }

        if (adapterPos != RecyclerView.NO_POSITION && hasHeader(adapterPos)) {
            long headerId = mAdapter.getHeaderId(adapterPos);

            if (headerId != previousHeaderId) {
                previousHeaderId = headerId;
                View header = getHeader(parent, adapterPos).itemView;
                canvas.save();

                final int left = child.getLeft();
                final int top = getHeaderTop(parent, child, header, adapterPos, layoutPos);
                canvas.translate(left, top);

                header.setTranslationX(left);
                header.setTranslationY(top);
                header.draw(canvas);
                canvas.restore();
            }
        }
    }
}

From source file:com.sanjie.zy.adpter.decoration.StickyHeaderDecoration.java

/**
 * {@inheritDoc}/*from   ww w .  j  a v  a 2  s  .co  m*/
 */
@Override
public void onDrawOver(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
    if (parent.getAdapter() == null) {
        return;
    }

    final int count = parent.getChildCount();
    long previousHeaderId = -1;

    for (int layoutPos = 0; layoutPos < count; layoutPos++) {
        final View child = parent.getChildAt(layoutPos);
        int adapterPos = parent.getChildAdapterPosition(child);

        if (!mIncludeHeader) {
            if (parent.getAdapter() instanceof ZYRecyclerViewAdapter) {
                int headerCount = ((ZYRecyclerViewAdapter) parent.getAdapter()).getHeaderCount();
                int footerCount = ((ZYRecyclerViewAdapter) parent.getAdapter()).getFooterCount();
                int dataCount = ((ZYRecyclerViewAdapter) parent.getAdapter()).getDataCount();
                if (adapterPos < headerCount) {
                    continue;
                }
                if (adapterPos >= headerCount + dataCount) {
                    continue;
                }
                if (adapterPos >= headerCount) {
                    adapterPos -= headerCount;
                }

            }
        }

        if (adapterPos != RecyclerView.NO_POSITION && hasHeader(adapterPos)) {
            long headerId = mAdapter.getHeaderId(adapterPos);

            if (headerId != previousHeaderId) {
                previousHeaderId = headerId;
                View header = getHeader(parent, adapterPos).itemView;
                canvas.save();

                final int left = child.getLeft();
                final int top = getHeaderTop(parent, child, header, adapterPos, layoutPos);
                canvas.translate(left, top);

                header.setTranslationX(left);
                header.setTranslationY(top);
                header.draw(canvas);
                canvas.restore();
            }
        }
    }
}

From source file:com.xiaosu.lib.base.widget.drawerLayout.DrawerLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final boolean drawingContent = child == mContentView;
    int clipBottom = mDrawerView.getTop();

    final int restoreCount = canvas.save();
    if (drawingContent) {
        canvas.clipRect(0, 0, getWidth(), clipBottom);
    }//from w  w w  .  ja va  2s  .  co  m
    final boolean result = super.drawChild(canvas, child, drawingTime);
    canvas.restoreToCount(restoreCount);

    if (mScrimOpacity > 0 && drawingContent) {
        final int baseAlpha = (mScrimColor & 0xff000000) >>> 24;
        final int imag = (int) (baseAlpha * mScrimOpacity);
        final int color = imag << 24 | (mScrimColor & 0xffffff);
        mScrimPaint.setColor(color);

        canvas.drawRect(0, 0, getWidth(), clipBottom, mScrimPaint);
    }
    return result;
}

From source file:org.androfarsh.widget.DragGridLayout.java

private void drawHighlight(final View child, final Canvas canvas) {
    if ((mHighlightDrawable != null)) {
        requestFreeCellRegion(mDragNode.view);
        if (!requestHoverRect(mTmpRect)) {
            return;
        }//from ww  w  .  j a  v a 2s  .c o m
        canvas.save();
        canvas.clipRect(mTmpRect);
        mHighlightDrawable.setBounds(mTmpRect);

        mTmpRegion.set(mFreeCellsRegion);
        mTmpRegion.op(mTmpRect, Op.INTERSECT);
        mTmpRegion.getBounds(mTmpRect);

        final boolean allowed = mTmpRegion.isRect() && (child.getWidth() <= mTmpRect.width())
                && (child.getHeight() <= mTmpRect.height());
        final int[] stateSet = new int[] { (allowed ? 1 : -1) * R.attr.state_drop_allow };

        mHighlightDrawable.setState(stateSet);
        mHighlightDrawable.draw(canvas);
        canvas.restore();
    }
}

From source file:com.jjoe64.graphview.GridLabelRenderer.java

/**
 * draws the vertical axis title if//from www  .  ja v a2 s . co  m
 * it is set
 * @param canvas canvas
 */
protected void drawVerticalAxisTitle(Canvas canvas) {
    if (mVerticalAxisTitle != null && mVerticalAxisTitle.length() > 0) {
        mPaintAxisTitle.setColor(getVerticalAxisTitleColor());
        mPaintAxisTitle.setTextSize(getVerticalAxisTitleTextSize());
        float x = getVerticalAxisTitleWidth();
        float y = canvas.getHeight() / 2;
        canvas.save();
        canvas.rotate(-90, x, y);
        canvas.drawText(mVerticalAxisTitle, x, y, mPaintAxisTitle);
        canvas.restore();
    }
}

From source file:com.mukesh.OtpView.java

private void drawOtpView(Canvas canvas) {
    int nextItemToFill;
    if (rtlTextDirection) {
        nextItemToFill = otpViewItemCount - 1;
    } else {//from   ww  w . ja  v a 2  s. com
        if (getText() != null) {
            nextItemToFill = getText().length();
        } else {
            nextItemToFill = 0;
        }
    }
    for (int i = 0; i < otpViewItemCount; i++) {
        boolean itemSelected = isFocused() && nextItemToFill == i;
        boolean itemFilled = i < nextItemToFill;
        int[] itemState = null;
        if (itemFilled) {
            itemState = FILLED_STATE;
        } else if (itemSelected) {
            itemState = SELECTED_STATE;
        }
        paint.setColor(itemState != null ? getLineColorForState(itemState) : cursorLineColor);
        updateItemRectF(i);
        updateCenterPoint();
        canvas.save();
        if (viewType == VIEW_TYPE_RECTANGLE) {
            updateOtpViewBoxPath(i);
            canvas.clipPath(path);
        }
        drawItemBackground(canvas, itemState);
        canvas.restore();
        if (itemSelected) {
            drawCursor(canvas);
        }
        if (viewType == VIEW_TYPE_RECTANGLE) {
            drawOtpBox(canvas, i);
        } else if (viewType == VIEW_TYPE_LINE) {
            drawOtpLine(canvas, i);
        }
        if (DBG) {
            drawAnchorLine(canvas);
        }
        if (rtlTextDirection) {
            int reversedPosition = otpViewItemCount - i;
            if (getText().length() >= reversedPosition) {
                drawInput(canvas, i);
            } else if (!TextUtils.isEmpty(getHint()) && getHint().length() == otpViewItemCount) {
                drawHint(canvas, i);
            }
        } else {
            if (getText().length() > i) {
                drawInput(canvas, i);
            } else if (!TextUtils.isEmpty(getHint()) && getHint().length() == otpViewItemCount) {
                drawHint(canvas, i);
            }
        }
    }
    if (isFocused() && getText() != null && getText().length() != otpViewItemCount
            && viewType == VIEW_TYPE_RECTANGLE) {
        int index = getText().length();
        updateItemRectF(index);
        updateCenterPoint();
        updateOtpViewBoxPath(index);
        paint.setColor(getLineColorForState(SELECTED_STATE));
        drawOtpBox(canvas, index);
    }
}

From source file:org.akop.crosswords.view.CrosswordView.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mPuzzleBitmap != null) {
        canvas.save();
        canvas.clipRect(mContentRect);/*from   w  ww  .  j a v  a2s. co m*/
        canvas.translate(mBitmapOffset.x, mBitmapOffset.y);
        canvas.scale(mBitmapScale, mBitmapScale);
        canvas.drawBitmap(mPuzzleBitmap, 0, 0, mBitmapPaint);

        canvas.restore();
    }
}