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:com.ruesga.timelinechart.TimelineChartView.java

private void drawEdgeEffects(Canvas c) {
    boolean needsInvalidate = false;

    if (mEdgeEffectLeft != null && !mEdgeEffectLeft.isFinished()) {
        final int restoreCount = c.save();
        c.rotate(270);/*from  ww w. j a  va2 s .  c o m*/
        c.translate(-mGraphArea.height() - mGraphArea.top, mGraphArea.left);
        mEdgeEffectLeft.setSize((int) mGraphArea.height(), (int) mGraphArea.width());
        needsInvalidate = mEdgeEffectLeft.draw(c);
        c.restoreToCount(restoreCount);
    }

    if (mEdgeEffectRight != null && !mEdgeEffectRight.isFinished()) {
        final int restoreCount = c.save();
        c.rotate(90);
        c.translate(mGraphArea.top, -getWidth() + (getWidth() - mGraphArea.right));
        mEdgeEffectRight.setSize((int) mGraphArea.height(), (int) mGraphArea.width());
        needsInvalidate |= mEdgeEffectRight.draw(c);
        c.restoreToCount(restoreCount);
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

From source file:com.shizhefei.view.largeimage.LargeImageView.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (getMeasuredWidth() == 0 || getMeasuredHeight() == 0) {
        return;/*from   www  .j  a va  2  s  . c om*/
    }
    if (!hasLoad()) {
        return;
    }
    int drawOffsetX = 0;
    int drawOffsetY = 0;
    int contentWidth = getContentWidth();
    int contentHeight = getContentHeight();
    int layoutWidth = getMeasuredWidth();
    int layoutHeight = getMeasuredHeight();
    if (layoutWidth > contentWidth) {
        drawOffsetX = (layoutWidth - contentWidth) / 2;
    }
    if (layoutHeight > contentHeight) {
        drawOffsetY = (layoutHeight - contentHeight) / 2;
    }
    if (mDrawable != null) {
        mDrawable.setBounds(drawOffsetX, drawOffsetY, drawOffsetX + contentWidth, drawOffsetY + contentHeight);
        mDrawable.draw(canvas);
    } else if (mFactory != null) {
        int mOffsetX = 0;
        int mOffsetY = 0;
        int left = getScrollX();
        int right = left + getMeasuredWidth();
        int top = getScrollY();
        int bottom = top + getMeasuredHeight();
        float width = mScale * getWidth();
        float imgWidth = imageBlockLoader.getWidth();

        float imageScale = imgWidth / width;

        // ?
        imageRect.left = (int) Math.ceil((left - mOffsetX) * imageScale);
        imageRect.top = (int) Math.ceil((top - mOffsetY) * imageScale);
        imageRect.right = (int) Math.ceil((right - mOffsetX) * imageScale);
        imageRect.bottom = (int) Math.ceil((bottom - mOffsetY) * imageScale);

        List<BlockImageLoader.DrawData> drawData = imageBlockLoader.getDrawData(imageScale, imageRect);

        int saveCount = canvas.save();
        for (BlockImageLoader.DrawData data : drawData) {
            Rect drawRect = data.imageRect;
            drawRect.left = (int) (Math.ceil(drawRect.left / imageScale) + mOffsetX) + drawOffsetX;
            drawRect.top = (int) (Math.ceil(drawRect.top / imageScale) + mOffsetY) + drawOffsetY;
            drawRect.right = (int) (Math.ceil(drawRect.right / imageScale) + mOffsetX) + drawOffsetX;
            drawRect.bottom = (int) (Math.ceil(drawRect.bottom / imageScale) + mOffsetY) + drawOffsetY;
            canvas.drawBitmap(data.bitmap, data.srcRect, drawRect, null);
        }
        canvas.restoreToCount(saveCount);
    }
}

From source file:com.hippo.widget.BothScrollView.java

@SuppressWarnings("SuspiciousNameCombination")
@Override//from  w  w  w  . java 2  s .c  o m
public void draw(Canvas canvas) {
    super.draw(canvas);
    if (mEdgeGlowLeft != null) {
        final int scrollX = getScrollX();
        final int scrollY = getScrollY();
        final int width = getWidth();
        final int height = getHeight();
        if (!mEdgeGlowLeft.isFinished()) {
            final int restoreCount = canvas.save();
            canvas.rotate(270);
            canvas.translate(-height - scrollY, Math.min(0, scrollX));
            mEdgeGlowLeft.setSize(height, width);
            if (mEdgeGlowLeft.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowRight.isFinished()) {
            final int restoreCount = canvas.save();
            canvas.rotate(90);
            canvas.translate(scrollY, -(Math.max(getHorizontalScrollRange(), scrollX) + width));
            mEdgeGlowRight.setSize(height, width);
            if (mEdgeGlowRight.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowTop.isFinished()) {
            final int restoreCount = canvas.save();
            canvas.translate(scrollX, Math.min(0, scrollY));
            mEdgeGlowTop.setSize(width, height);
            if (mEdgeGlowTop.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowBottom.isFinished()) {
            final int restoreCount = canvas.save();
            canvas.translate(-width + scrollX, Math.max(getVerticalScrollRange(), scrollY) + height);
            canvas.rotate(180, width, 0);
            mEdgeGlowBottom.setSize(width, height);
            if (mEdgeGlowBottom.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }
            canvas.restoreToCount(restoreCount);
        }
    }
}

From source file:org.immopoly.android.widget.ViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);//w w w . j  av a 2 s.c  o m
            canvas.translate(-height + getPaddingTop(), 0);
            mLeftEdge.setSize(height, getWidth());
            needsInvalidate |= mLeftEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = forcedChildWidth > 0 ? forcedChildWidth : getWidth();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();
            final int itemCount = mAdapter != null ? mAdapter.getCount() : 1;

            canvas.rotate(90);
            canvas.translate(-getPaddingTop(), -itemCount * (width + mPageMargin) + mPageMargin);
            mRightEdge.setSize(height, width);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        invalidate();
    }
}

From source file:de.uni_weimar.mheinz.androidtouchscope.display.HandleView.java

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

    if (mIsOn) {//w w w. j av  a  2s.  c om
        mShapeDrawable.getPaint().setStyle(Paint.Style.FILL_AND_STROKE);
        mShapeDrawable.getPaint().setColor(mColor);
        mShapeDrawable.getPaint().setShadowLayer(2, 2, 2, Color.GRAY);
        mShapeDrawable.draw(canvas);
    } else {
        /*mShapeDrawable.getPaint().setStyle(Paint.Style.FILL);
        mShapeDrawable.getPaint().setColor(Color.WHITE);
        mShapeDrawable.getPaint().setShadowLayer(2,2,2,Color.GRAY);
        mShapeDrawable.draw(canvas);
        mShapeDrawable.getPaint().setStyle(Paint.Style.STROKE);
        mShapeDrawable.getPaint().setColor(Color.BLACK);
        mShapeDrawable.draw(canvas);*/
        mShapeDrawable.getPaint().setStyle(Paint.Style.FILL_AND_STROKE);
        mShapeDrawable.getPaint().setColor(Color.LTGRAY);
        mShapeDrawable.getPaint().setShadowLayer(2, 2, 2, Color.GRAY);
        mShapeDrawable.draw(canvas);
    }

    PointF center = getCircleCenter();
    mMainTextPaint.getTextBounds(mMainText, 0, mMainText.length(), mTextBounds);
    if (mOrientation == HandleDirection.RIGHT)
        canvas.drawText(mMainText, center.x + 5, center.y + mTextBounds.height() / 2 - 1, mMainTextPaint);
    else if (mOrientation == HandleDirection.LEFT)
        canvas.drawText(mMainText, center.x - 5, center.y + mTextBounds.height() / 2 - 2, mMainTextPaint);
    else
        canvas.drawText(mMainText, center.x, center.y + mTextBounds.height() / 2, mMainTextPaint);

    if (mPressDrawable != null) {
        if (mOrientation == HandleDirection.RIGHT) {
            mPressDrawable.setBounds(2, (int) (center.y - HANDLE_BREADTH / 2), HANDLE_BREADTH - 3,
                    (int) center.y + HANDLE_BREADTH / 2);
            mPressDrawable.draw(canvas);
        } else if (mOrientation == HandleDirection.LEFT) {
            canvas.save();
            canvas.rotate(180, HANDLE_LENGTH / 2, mHandlePos);
            mPressDrawable.setBounds(1, (int) (center.y - HANDLE_BREADTH / 2), HANDLE_BREADTH - 5,
                    (int) center.y + HANDLE_BREADTH / 2);
            mPressDrawable.draw(canvas);
            canvas.restore();
        }
    }
}

From source file:com.huangj.huangjlibrary.widget.drawerlayout.DrawerLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final int height = getHeight();
    final boolean drawingContent = isContentView(child);
    int clipLeft = 0, clipRight = getWidth();

    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;
            }//from   www .ja v  a2  s  .com

            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 (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(clipLeft, 0, clipRight, getHeight(), mScrimPaint);
    } else if (mShadowLeftResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
        final int shadowWidth = mShadowLeftResolved.getIntrinsicWidth();
        final int childRight = child.getRight();
        final int drawerPeekDistance = mLeftDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) childRight / drawerPeekDistance, 1.f));
        mShadowLeftResolved.setBounds(childRight, child.getTop(), childRight + shadowWidth, child.getBottom());
        mShadowLeftResolved.setAlpha((int) (0xff * alpha));
        mShadowLeftResolved.draw(canvas);
    } else if (mShadowRightResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.RIGHT)) {
        final int shadowWidth = mShadowRightResolved.getIntrinsicWidth();
        final int childLeft = child.getLeft();
        final int showing = getWidth() - childLeft;
        final int drawerPeekDistance = mRightDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) showing / drawerPeekDistance, 1.f));
        mShadowRightResolved.setBounds(childLeft - shadowWidth, child.getTop(), childLeft, child.getBottom());
        mShadowRightResolved.setAlpha((int) (0xff * alpha));
        mShadowRightResolved.draw(canvas);
    }
    return result;
}

From source file:am.widget.indicatortabstrip.IndicatorTabStrip.java

/**
 * /*from   w  w  w  . j  av a  2  s .com*/
 *
 * @param canvas     
 * @param position   ???
 * @param itemWidth  ?
 * @param itemHeight ?
 */
protected void drawText(Canvas canvas, int position, int itemWidth, int itemHeight) {
    if (getItemText(position) == null)
        return;
    String text = getItemText(position).toString();
    if (text.length() <= 0)
        return;
    mTextPaint.setTextSize(mTextSize);
    if (mTextColor == null) {
        mTextPaint.setColor(DEFAULT_TEXT_COLOR);
    } else {
        final int normalColor = mTextColor.getDefaultColor();
        final int selectedColor = mTextColor.getColorForState(SELECTED_STATE_SET, normalColor);
        if (position == mNextPager) {
            mTextPaint.setColor(getColor(normalColor, selectedColor, mOffset));
        } else if (position == mCurrentPager) {
            mTextPaint.setColor(getColor(normalColor, selectedColor, 1 - mOffset));
        } else {
            mTextPaint.setColor(normalColor);
        }
    }
    final float centerX = ViewCompat.getPaddingStart(this)
            + (itemWidth + getIntervalWidth()) * ((float) position + 0.5f);
    final float centerY = getPaddingTop() + itemHeight * 0.5f;
    float scale;
    if (position == mNextPager) {
        scale = 1 + (mTextScale - 1) * mOffset;
    } else if (position == mCurrentPager) {
        scale = 1 + (mTextScale - 1) * (1 - mOffset);
    } else {
        scale = 1;
    }
    canvas.save();
    canvas.translate(centerX, centerY + mTextDesc);
    if (scale != 1) {
        canvas.scale(scale, scale, 0, -mTextDesc);
    }
    canvas.drawText(text, 0, 0, mTextPaint);
    canvas.restore();
}

From source file:org.chromium.chrome.browser.toolbar.ToolbarPhone.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    if (child == mLocationBar)
        return drawLocationBar(canvas, drawingTime);
    boolean clipped = false;

    if (mLocationBarBackground != null
            && ((mTabSwitcherState == STATIC_TAB && !mTabSwitcherModeViews.contains(child))
                    || (mTabSwitcherState != STATIC_TAB && mBrowsingModeViews.contains(child)))) {
        canvas.save();

        int translationY = (int) mLocationBar.getTranslationY();
        int clipTop = mLocationBarBackgroundBounds.top - mLocationBarBackgroundPadding.top + translationY;
        if (mUrlExpansionPercent != 0f && clipTop < child.getBottom()) {
            // For other child views, use the inverse clipping of the URL viewport.
            // Only necessary during animations.
            // Hardware mode does not support unioned clip regions, so clip using the
            // appropriate bounds based on whether the child is to the left or right of the
            // location bar.
            boolean isLeft = (child == mNewTabButton || child == mHomeButton) ^ LocalizationUtils.isLayoutRtl();

            int clipBottom = mLocationBarBackgroundBounds.bottom + mLocationBarBackgroundPadding.bottom
                    + translationY;//from   w ww.j  a  v a2s .  c o  m
            boolean verticalClip = false;
            if (translationY > 0f) {
                clipTop = child.getTop();
                clipBottom = clipTop;
                verticalClip = true;
            }

            if (isLeft) {
                int clipRight = verticalClip ? child.getMeasuredWidth()
                        : mLocationBarBackgroundBounds.left - mLocationBarBackgroundPadding.left;
                canvas.clipRect(0, clipTop, clipRight, clipBottom);
            } else {
                int clipLeft = verticalClip ? 0
                        : mLocationBarBackgroundBounds.right + mLocationBarBackgroundPadding.right;
                canvas.clipRect(clipLeft, clipTop, getMeasuredWidth(), clipBottom);
            }
        }
        clipped = true;
    }
    boolean retVal = super.drawChild(canvas, child, drawingTime);
    if (clipped)
        canvas.restore();
    return retVal;
}

From source file:beichen.douban.ui.view.LazyViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);//from  w  ww .j  a v a 2  s .  c  om
            canvas.translate(-height + getPaddingTop(), 0);
            mLeftEdge.setSize(height, getWidth());
            needsInvalidate |= mLeftEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();
            final int itemCount = mAdapter != null ? mAdapter.getCount() : 1;

            canvas.rotate(90);
            canvas.translate(-getPaddingTop(), -itemCount * (width + mPageMargin) + mPageMargin);
            mRightEdge.setSize(height, width);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        invalidate();
    }
}

From source file:com.huewu.pla.lib.internal.PLAListView.java

void drawOverscrollFooter(final Canvas canvas, final Drawable drawable, final Rect bounds) {
    final int height = drawable.getMinimumHeight();

    canvas.save();
    canvas.clipRect(bounds);/* w  w  w .j  ava2  s .c  o m*/

    final int span = bounds.bottom - bounds.top;
    if (span < height) {
        bounds.bottom = bounds.top + height;
    }

    drawable.setBounds(bounds);
    drawable.draw(canvas);

    canvas.restore();
}