diff options
Diffstat (limited to 'src/main/java/de/pixart/messenger/ui/widget')
| -rw-r--r-- | src/main/java/de/pixart/messenger/ui/widget/ScannerView.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java b/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java new file mode 100644 index 000000000..0a2a80039 --- /dev/null +++ b/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java @@ -0,0 +1,158 @@ +/* + * Copyright 2012-2015 the original author or authors. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +package de.pixart.messenger.ui.widget; + +import android.content.Context; +import android.content.res.Resources; +import android.graphics.Canvas; +import android.graphics.Matrix; +import android.graphics.Matrix.ScaleToFit; +import android.graphics.Paint; +import android.graphics.Paint.Style; +import android.graphics.Rect; +import android.graphics.RectF; +import android.util.AttributeSet; +import android.view.View; + +import com.google.zxing.ResultPoint; + +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; + +import de.pixart.messenger.R; + +/** + * @author Andreas Schildbach + */ + +public class ScannerView extends View { + private static final long LASER_ANIMATION_DELAY_MS = 100l; + private static final int DOT_OPACITY = 0xa0; + private static final int DOT_TTL_MS = 500; + + private final Paint maskPaint; + private final Paint laserPaint; + private final Paint dotPaint; + private final int maskColor, maskResultColor; + private final int laserColor; + private final int dotColor, dotResultColor; + private final Map<float[], Long> dots = new HashMap<float[], Long>(16); + private final Matrix matrix = new Matrix(); + private boolean isResult; + private Rect frame; + + public ScannerView(final Context context, final AttributeSet attrs) { + super(context, attrs); + + final Resources res = getResources(); + maskColor = res.getColor(R.color.scan_mask); + maskResultColor = res.getColor(R.color.scan_result_view); + laserColor = res.getColor(R.color.scan_laser); + dotColor = res.getColor(R.color.scan_dot); + dotResultColor = res.getColor(R.color.scan_result_dots); + + maskPaint = new Paint(); + maskPaint.setStyle(Style.FILL); + + laserPaint = new Paint(); + laserPaint.setStrokeWidth(res.getDimensionPixelSize(R.dimen.scan_laser_width)); + laserPaint.setStyle(Style.STROKE); + + dotPaint = new Paint(); + dotPaint.setAlpha(DOT_OPACITY); + dotPaint.setStyle(Style.STROKE); + dotPaint.setStrokeWidth(res.getDimension(R.dimen.scan_dot_size)); + dotPaint.setAntiAlias(true); + } + + public void setFraming(final Rect frame, final RectF framePreview, final int displayRotation, + final int cameraRotation, final boolean cameraFlip) { + this.frame = frame; + matrix.setRectToRect(framePreview, new RectF(frame), ScaleToFit.FILL); + matrix.postRotate(-displayRotation, frame.exactCenterX(), frame.exactCenterY()); + matrix.postScale(cameraFlip ? -1 : 1, 1, frame.exactCenterX(), frame.exactCenterY()); + matrix.postRotate(cameraRotation, frame.exactCenterX(), frame.exactCenterY()); + + invalidate(); + } + + public void setIsResult(final boolean isResult) { + this.isResult = isResult; + + invalidate(); + } + + public void addDot(final ResultPoint dot) { + dots.put(new float[]{dot.getX(), dot.getY()}, System.currentTimeMillis()); + + invalidate(); + } + + @Override + public void onDraw(final Canvas canvas) { + if (frame == null) + return; + + final long now = System.currentTimeMillis(); + + final int width = canvas.getWidth(); + final int height = canvas.getHeight(); + + final float[] point = new float[2]; + + // draw mask darkened + maskPaint.setColor(isResult ? maskResultColor : maskColor); + canvas.drawRect(0, 0, width, frame.top, maskPaint); + canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, maskPaint); + canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, maskPaint); + canvas.drawRect(0, frame.bottom + 1, width, height, maskPaint); + + if (isResult) { + laserPaint.setColor(dotResultColor); + laserPaint.setAlpha(160); + + dotPaint.setColor(dotResultColor); + } else { + laserPaint.setColor(laserColor); + final boolean laserPhase = (now / 600) % 2 == 0; + laserPaint.setAlpha(laserPhase ? 160 : 255); + + dotPaint.setColor(dotColor); + + // schedule redraw + postInvalidateDelayed(LASER_ANIMATION_DELAY_MS); + } + + canvas.drawRect(frame, laserPaint); + + // draw points + for (final Iterator<Map.Entry<float[], Long>> i = dots.entrySet().iterator(); i.hasNext(); ) { + final Map.Entry<float[], Long> entry = i.next(); + final long age = now - entry.getValue(); + if (age < DOT_TTL_MS) { + dotPaint.setAlpha((int) ((DOT_TTL_MS - age) * 256 / DOT_TTL_MS)); + + matrix.mapPoints(point, entry.getKey()); + canvas.drawPoint(point[0], point[1], dotPaint); + } else { + i.remove(); + } + } + } +}
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