/**
* Zoom in the graph
*
* <p>拡大表示する。
*
* <p>放大表示
*/
public void zoomIn() {
if (displayNumber > minDisplayNumber) {
// 区分缩放方向
if (zoomBaseLine == ZOOM_BASE_LINE_CENTER) {
displayNumber = displayNumber - ZOOM_STEP;
displayFrom = displayFrom + ZOOM_STEP / 2;
} else if (zoomBaseLine == ZOOM_BASE_LINE_LEFT) {
displayNumber = displayNumber - ZOOM_STEP;
} else if (zoomBaseLine == ZOOM_BASE_LINE_RIGHT) {
displayNumber = displayNumber - ZOOM_STEP;
displayFrom = displayFrom + ZOOM_STEP;
}
// 处理displayNumber越界
if (displayNumber < minDisplayNumber) {
displayNumber = minDisplayNumber;
}
// 处理displayFrom越界
if (displayFrom + displayNumber >= stickData.size()) {
displayFrom = stickData.size() - displayNumber;
}
// Listener
if (onZoomGestureListener != null) {
onZoomGestureListener.onZoom(ZOOM_IN, displayFrom, displayNumber);
}
}
}
/**
* initialize degrees on Y axis
*
* <p>Y軸の目盛を初期化
*
* <p>初始化Y轴的坐标值
*/
protected void initAxisX() {
List<String> titleX = new ArrayList<String>();
if (null != stickData && stickData.size() > 0) {
float average = displayNumber / this.getLongitudeNum();
for (int i = 0; i < this.getLongitudeNum(); i++) {
int index = (int) Math.floor(i * average);
if (index > displayNumber - 1) {
index = displayNumber - 1;
}
index = index + displayFrom;
titleX.add(formatAxisXDegree(stickData.get(index).getDate()));
}
titleX.add(formatAxisXDegree(stickData.get(displayFrom + displayNumber - 1).getDate()));
}
super.setLongitudeTitles(titleX);
}
/**
* add a new stick data to sticks
*
* <p>新しいスティックデータを追加する
*
* <p>追加一条新数据
*
* @param entity
* <p>data
* <p>データ
* <p>新数据
*/
public void addData(IStickEntity entity) {
if (null != entity) {
// add
stickData.add(entity);
if (this.maxValue < entity.getHigh()) {
this.maxValue = 100 + ((int) entity.getHigh()) / 100 * 100;
}
}
}
protected void drawSticks(Canvas canvas) {
if (null == stickData) {
return;
}
if (stickData.size() == 0) {
return;
}
Paint mPaintStick = new Paint();
mPaintStick.setColor(stickFillColor);
float stickWidth = getDataQuadrantPaddingWidth() / displayNumber - stickSpacing;
float stickX = getDataQuadrantPaddingStartX();
for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
IMeasurable stick = stickData.get(i);
float highY =
(float)
((1f - (stick.getHigh() - minValue) / (maxValue - minValue))
* (getDataQuadrantPaddingHeight())
+ getDataQuadrantPaddingStartY());
float lowY =
(float)
((1f - (stick.getLow() - minValue) / (maxValue - minValue))
* (getDataQuadrantPaddingHeight())
+ getDataQuadrantPaddingStartY());
// stick or line?
if (stickWidth >= 2f) {
canvas.drawRect(stickX, highY, stickX + stickWidth, lowY, mPaintStick);
} else {
canvas.drawLine(stickX, highY, stickX, lowY, mPaintStick);
}
// next x
stickX = stickX + stickSpacing + stickWidth;
}
}
/**
* Zoom out the grid
*
* <p>縮小表示する。
*
* <p>缩小
*/
public void zoomOut() {
if (displayNumber < stickData.size() - 1) {
if (displayNumber + ZOOM_STEP > stickData.size() - 1) {
displayNumber = stickData.size() - 1;
displayFrom = 0;
} else {
// 区分缩放方向
if (zoomBaseLine == ZOOM_BASE_LINE_CENTER) {
displayNumber = displayNumber + ZOOM_STEP;
if (displayFrom > 1) {
displayFrom = displayFrom - ZOOM_STEP / 2;
} else {
displayFrom = 0;
}
} else if (zoomBaseLine == ZOOM_BASE_LINE_LEFT) {
displayNumber = displayNumber + ZOOM_STEP;
} else if (zoomBaseLine == ZOOM_BASE_LINE_RIGHT) {
displayNumber = displayNumber + ZOOM_STEP;
if (displayFrom > ZOOM_STEP) {
displayFrom = displayFrom - ZOOM_STEP;
} else {
displayFrom = 0;
}
}
}
if (displayFrom + displayNumber >= stickData.size()) {
displayNumber = stickData.size() - displayFrom;
}
// Listener
if (onZoomGestureListener != null) {
onZoomGestureListener.onZoom(ZOOM_OUT, displayFrom, displayNumber);
}
}
}
/*
* (non-Javadoc)
*
* @param value
*
* @return
*
* @see
* cn.limc.androidcharts.view.GridChart#getAxisXGraduate(java.lang.Object)
*/
@Override
public String getAxisXGraduate(Object value) {
float graduate = Float.valueOf(super.getAxisXGraduate(value));
int index = (int) Math.floor(graduate * displayNumber);
if (index >= displayNumber) {
index = displayNumber - 1;
} else if (index < 0) {
index = 0;
}
index = index + displayFrom;
return formatAxisXDegree(stickData.get(index).getDate());
}
public void moveRight() {
int dataSize = stickData.size();
if (displayFrom + displayNumber < dataSize - SLIP_STEP) {
displayFrom = displayFrom + SLIP_STEP;
} else {
displayFrom = dataSize - displayNumber;
}
// 处理displayFrom越界
if (displayFrom + displayNumber >= dataSize) {
displayFrom = dataSize - displayNumber;
}
// Listener
if (onSlipGestureListener != null) {
onSlipGestureListener.onSlip(SLIP_DIRECTION_RIGHT, displayFrom, displayNumber);
}
}
public void moveLeft() {
int dataSize = stickData.size();
if (displayFrom <= SLIP_STEP) {
displayFrom = 0;
} else if (displayFrom > SLIP_STEP) {
displayFrom = displayFrom - SLIP_STEP;
} else {
}
// 处理displayFrom越界
if (displayFrom + displayNumber >= dataSize) {
displayFrom = dataSize - displayNumber;
}
// Listener
if (onSlipGestureListener != null) {
onSlipGestureListener.onSlip(SLIP_DIRECTION_LEFT, displayFrom, displayNumber);
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// valid
if (!isValidTouchPoint(event.getX(), event.getY())) {
return false;
}
if (null == stickData || stickData.size() == 0) {
return false;
}
final float MIN_LENGTH = (super.getWidth() / 40) < 5 ? 5 : (super.getWidth() / 50);
switch (event.getAction() & MotionEvent.ACTION_MASK) {
// 设置拖拉模式
case MotionEvent.ACTION_DOWN:
touchMode = TOUCH_MODE_SINGLE;
if (event.getPointerCount() == 1) {
touchPoint = new PointF(event.getX(), event.getY());
fixTouchPoint();
if (onTouchGestureListener != null) {
onTouchGestureListener.onTouchDown(touchPoint, getSelectedIndex());
}
super.postInvalidate();
// Notifier
super.notifyEventAll(this);
}
break;
case MotionEvent.ACTION_UP:
touchMode = TOUCH_MODE_NONE;
startPointA = null;
startPointB = null;
if (event.getPointerCount() == 1) {
touchPoint = new PointF(event.getX(), event.getY());
fixTouchPoint();
if (onTouchGestureListener != null) {
onTouchGestureListener.onTouchUp(touchPoint, getSelectedIndex());
}
super.postInvalidate();
// Notifier
super.notifyEventAll(this);
}
break;
case MotionEvent.ACTION_POINTER_UP:
touchMode = TOUCH_MODE_NONE;
startPointA = null;
startPointB = null;
return super.onTouchEvent(event);
// 设置多点触摸模式
case MotionEvent.ACTION_POINTER_DOWN:
olddistance = calcDistance(event);
if (olddistance > MIN_LENGTH) {
touchMode = TOUCH_MODE_MULTI;
startPointA = new PointF(event.getX(0), event.getY(0));
startPointB = new PointF(event.getX(1), event.getY(1));
}
break;
case MotionEvent.ACTION_MOVE:
if (touchMode == TOUCH_MODE_MULTI) {
newdistance = calcDistance(event);
if (newdistance > MIN_LENGTH) {
// if (startPointA.x >= event.getX(0)
// && startPointB.x >= event.getX(1)) {
// moveRight();
// } else if (startPointA.x <= event.getX(0)
// && startPointB.x <= event.getX(1)) {
// moveLeft();
// } else {
if (Math.abs(newdistance - olddistance) > MIN_LENGTH) {
if (newdistance > olddistance) {
zoomIn();
} else {
zoomOut();
}
// 重置距离
olddistance = newdistance;
}
// }
startPointA = new PointF(event.getX(0), event.getY(0));
startPointB = new PointF(event.getX(1), event.getY(1));
super.postInvalidate();
super.notifyEventAll(this);
}
} else {
// 单点拖动效果
if (event.getPointerCount() == 1) {
float moveXdistance = Math.abs(event.getX() - touchPoint.x);
if (moveXdistance > MIN_LENGTH) {
if (touchPoint.x - event.getX() > 0) {
int startindex = getSelectedIndex();
touchPoint = new PointF(event.getX(), event.getY());
fixTouchPoint();
if (onTouchGestureListener != null) {
onTouchGestureListener.onTouchMoved(touchPoint, TOUCH_MODE_SINGLE);
}
int gapindex = Math.abs(getSelectedIndex() - startindex);
for (int i = 0; i < gapindex; i++) {
moveRight();
}
} else if (touchPoint.x - event.getX() < 0) {
int startindex = getSelectedIndex();
touchPoint = new PointF(event.getX(), event.getY());
fixTouchPoint();
if (onTouchGestureListener != null) {
onTouchGestureListener.onTouchMoved(touchPoint, TOUCH_MODE_SINGLE);
}
int gapindex = Math.abs(getSelectedIndex() - startindex);
for (int i = 0; i < gapindex; i++) {
moveLeft();
}
}
}
super.postInvalidate();
super.notifyEventAll(this);
}
}
break;
}
return true;
}