public SampleView(Context context) {
super(context);
setFocusable(true);
mPath = new Path();
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mRect = new Rect(0, 0, 120, 120);
mDrawable =
new GradientDrawable(
GradientDrawable.Orientation.TL_BR, new int[] {0xFFFF0000, 0xFF00FF00, 0xFF0000FF});
mDrawable.setShape(GradientDrawable.RECTANGLE);
mDrawable.setGradientRadius((float) (Math.sqrt(2) * 60));
}
private void drawBrightnessIndicator(Canvas canvas) {
// get a representation of the height of the indicator within the bar
float brightnessHeight = mNewColor[2] * mWheel.getHeight();
// Log.d(TAG, String.format("Brightness height: %f", brightnessHeight));
// convert the height to an absolute y position based on the bar's position
float absoluteY = mWheelPosition.y + mWheel.getHeight() - brightnessHeight;
// get the y value "above" the x axis for the x coordinate calculation
// note: because of symmetry, the sign doesn't matter so we'll use the positive
float heightAboveXAxis = Math.abs(brightnessHeight - (float) mRadius);
// Log.d(TAG, String.format("Height above X: %f", heightAboveXAxis));
float leftEdgeRadius = (float) (mRadius + SPACE_BETWEEN_WHEEL_AND_BAR);
float rightEdgeRadius = leftEdgeRadius + ARC_WIDTH;
// get the x coordinate relative to the center of the wheel
float leftXInCircle =
(float) Math.sqrt(leftEdgeRadius * leftEdgeRadius - heightAboveXAxis * heightAboveXAxis);
float rightXInCircle =
(float) Math.sqrt(rightEdgeRadius * rightEdgeRadius - heightAboveXAxis * heightAboveXAxis);
// get the absolute x and y coordinates of the left edge of the bar at the bar height
float leftX = mWheelCenter.x + leftXInCircle;
float rightX = mWheelCenter.x + rightXInCircle;
float indicatorHeight = BRIGHTNESS_INDICATOR_SIZE / 2.0f;
float indicatorWidth = BRIGHTNESS_INDICATOR_SIZE;
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setStrokeWidth(1.0f);
Path leftTrianglePath = new Path();
leftTrianglePath.moveTo(leftX, absoluteY - indicatorHeight);
leftTrianglePath.lineTo(leftX + indicatorWidth, absoluteY);
leftTrianglePath.lineTo(leftX, absoluteY + indicatorHeight);
leftTrianglePath.close();
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.FILL);
canvas.drawPath(leftTrianglePath, paint);
paint.setColor(Color.WHITE);
paint.setStyle(Paint.Style.STROKE);
canvas.drawPath(leftTrianglePath, paint);
Path rightTrianglePath = new Path();
rightTrianglePath.moveTo(rightX, absoluteY - indicatorHeight);
rightTrianglePath.lineTo(rightX - indicatorWidth, absoluteY);
rightTrianglePath.lineTo(rightX, absoluteY + indicatorHeight);
rightTrianglePath.close();
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.FILL);
canvas.drawPath(rightTrianglePath, paint);
paint.setColor(Color.WHITE);
paint.setStyle(Paint.Style.STROKE);
canvas.drawPath(rightTrianglePath, paint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
super.onTouchEvent(event);
// Logger.d(TAG, "onTouchEvent: " + event);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
isTouched = true;
this.setLayoutParams(newLp);
endPoint.x = (int) downX;
endPoint.y = (int) downY;
changeViewHeight(
this, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
postInvalidate();
downX = event.getX() + location[0];
downY = event.getY() + location[1];
// Logger.d(TAG, String.format("downX: %f, downY: %f", downX, downY));
break;
case MotionEvent.ACTION_MOVE:
// 计算直角边和斜边（用于计算绘制两圆之间的填充去）
triangle.deltaX = event.getX() - downX;
triangle.deltaY = -1 * (event.getY() - downY); // y轴方向相反，所有需要取反
double distance =
Math.sqrt(triangle.deltaX * triangle.deltaX + triangle.deltaY * triangle.deltaY);
triangle.hypotenuse = distance;
// Logger.d(TAG, "triangle: " + triangle);
refreshCurRadiusByMoveDistance((int) distance);
endPoint.x = (int) event.getX();
endPoint.y = (int) event.getY();
postInvalidate();
break;
case MotionEvent.ACTION_UP:
isTouched = false;
this.setLayoutParams(originLp);
if (isArrivedMaxMoved) { // 触发事件
changeViewHeight(this, originWidth, originHeight);
postInvalidate();
if (null != onDraggableFlagViewListener) {
onDraggableFlagViewListener.onFlagDismiss(this);
}
Logger.d(TAG, "触发事件...");
resetAfterDismiss();
} else { // 还原
changeViewHeight(this, originWidth, originHeight);
startRollBackAnimation(500 /*ms*/);
}
downX = Float.MAX_VALUE;
downY = Float.MAX_VALUE;
break;
}
return true;
}
// Determines which edges are hit by touching at (x, y).
public int getHit(float x, float y) {
Rect r = computeLayout();
final float hysteresis = 20F;
int retval = GROW_NONE;
if (mCircle) {
float distX = x - r.centerX();
float distY = y - r.centerY();
int distanceFromCenter = (int) Math.sqrt(distX * distX + distY * distY);
int radius = mDrawRect.width() / 2;
int delta = distanceFromCenter - radius;
if (Math.abs(delta) <= hysteresis) {
if (Math.abs(distY) > Math.abs(distX)) {
if (distY < 0) {
retval = GROW_TOP_EDGE;
} else {
retval = GROW_BOTTOM_EDGE;
}
} else {
if (distX < 0) {
retval = GROW_LEFT_EDGE;
} else {
retval = GROW_RIGHT_EDGE;
}
}
} else if (distanceFromCenter < radius) {
retval = MOVE;
} else {
retval = GROW_NONE;
}
} else {
// verticalCheck makes sure the position is between the top and
// the bottom edge (with some tolerance). Similar for horizCheck.
boolean verticalCheck = (y >= r.top - hysteresis) && (y < r.bottom + hysteresis);
boolean horizCheck = (x >= r.left - hysteresis) && (x < r.right + hysteresis);
// Check whether the position is near some edge(s).
if ((Math.abs(r.left - x) < hysteresis) && verticalCheck) {
retval |= GROW_LEFT_EDGE;
}
if ((Math.abs(r.right - x) < hysteresis) && verticalCheck) {
retval |= GROW_RIGHT_EDGE;
}
if ((Math.abs(r.top - y) < hysteresis) && horizCheck) {
retval |= GROW_TOP_EDGE;
}
if ((Math.abs(r.bottom - y) < hysteresis) && horizCheck) {
retval |= GROW_BOTTOM_EDGE;
}
// Not near any edge but inside the rectangle: move.
if (retval == GROW_NONE && r.contains((int) x, (int) y)) {
retval = MOVE;
}
}
return retval;
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
float xDelta = Math.abs(motionEvent.getRawX() - showcaseX);
float yDelta = Math.abs(motionEvent.getRawY() - showcaseY);
double distanceFromFocus = Math.sqrt(Math.pow(xDelta, 2) + Math.pow(yDelta, 2));
if (mOptions.hideOnClickOutside && distanceFromFocus > showcaseRadius) {
this.hide();
return true;
}
return mOptions.block && distanceFromFocus > showcaseRadius;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX() - CENTER_X;
float y = event.getY() - CENTER_Y;
boolean inCenter = Math.sqrt(x * x + y * y) <= CENTER_RADIUS;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mTrackingCenter = inCenter;
if (inCenter) {
mHighlightCenter = true;
invalidate();
break;
}
case MotionEvent.ACTION_MOVE:
if (mTrackingCenter) {
if (mHighlightCenter != inCenter) {
mHighlightCenter = inCenter;
invalidate();
}
} else {
float angle = (float) Math.atan2(y, x);
// need to turn angle [-PI ... PI] into unit [0....1]
float unit = angle / (2 * PI);
if (unit < 0) {
unit += 1;
}
mCenterPaint.setColor(interpColor(mColors, unit));
invalidate();
}
break;
case MotionEvent.ACTION_UP:
if (mTrackingCenter) {
if (inCenter) {
mListener.colorChanged(mCenterPaint.getColor());
}
mTrackingCenter = false; // so we draw w/o halo
invalidate();
}
break;
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX() - mWheelCenter.x;
float y = event.getY() - mWheelCenter.y;
double distanceFromCenter = Math.sqrt(x * x + y * y);
boolean inWheel = false;
boolean inBar = false;
if (distanceFromCenter <= mRadius) {
inWheel = true;
} else if (distanceFromCenter <= (mRadius + SPACE_BETWEEN_WHEEL_AND_BAR + ARC_WIDTH)
&& event.getX() > mWheelCenter.x) {
inBar = true;
}
switch (event.getAction()) {
// always change to the new color immediately using the appropriate control
case MotionEvent.ACTION_DOWN:
isTrackingHSWheel = inWheel;
isTrackingBBar = inBar;
if (inWheel) {
setCurrentHueSaturation(x, y, distanceFromCenter);
} else if (inBar) {
setCurrentBrightness(event.getY());
}
break;
case MotionEvent.ACTION_MOVE:
if (isTrackingHSWheel) {
setCurrentHueSaturation(x, y, distanceFromCenter);
} else if (isTrackingBBar) {
setCurrentBrightness(event.getY());
}
break;
case MotionEvent.ACTION_UP:
isTrackingHSWheel = false;
isTrackingBBar = false;
break;
}
return true;
}
/**
* @param deltaFlipDistance The distance to flip.
* @return The duration for a flip, bigger deltaFlipDistance = longer duration. The increase if
* duration gets smaller for bigger values of deltaFlipDistance.
*/
private int getFlipDuration(int deltaFlipDistance) {
float distance = Math.abs(deltaFlipDistance);
return (int)
(MAX_SINGLE_PAGE_FLIP_ANIM_DURATION * Math.sqrt(distance / FLIP_DISTANCE_PER_PAGE));
}