我想連接幾個獨立運行但相關的類。連接器設計模式?
可以說我正在寫一個應用程序,您可以在其中滑動繪製圖表。應用程序中有很多類是相關的,應該連接。
例如三個類別是:
組隊,探索 - 負責解釋用戶的手勢
點 - 負責處理圖表上的點
ChartDrawer - 負責繪製在屏幕上的圖表
我想知道是否有任何設計模式,如可以處理這些類的關係和通信的連接器?任何方式,我可以重新設計一個更好的方式,或讓更多的面向對象的頭腦?
這是一種延伸的觀點我ChartDraw類:
public class ChartDraw extends View implements GestureReceiver {
int chartYPosition;
private int circleColor;
private int circleRadius;
int height;
private float lastPointOnChart;
private int lineColor;
private int lineWidth;
private Paint paint;
private float tempPoint;
int width;
public ChartDraw(Context context) {
super(context);
init();
}
public ChartDraw(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public ChartDraw(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
this.lineWidth = 15;
this.circleRadius = 20;
this.lineColor = Color.parseColor("#1976D2");
this.circleColor = Color.parseColor("#536DFE");
this.lastPointOnChart = 0.0f;
this.tempPoint = 0.0f;
this.paint = new Paint();
this.height = getHeight();
this.width = getWidth();
this.chartYPosition = this.height/2;
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
this.chartYPosition = canvas.getHeight()/2;
this.paint.setStrokeWidth((float) this.lineWidth);
this.paint.setColor(this.lineColor);
canvas.drawLine(0.0f, (float) this.chartYPosition, this.tempPoint, (float) this.chartYPosition, this.paint);
if (this.tempPoint > 20.0f) {
this.paint.setColor(this.circleColor);
canvas.drawCircle(20.0f, (float) this.chartYPosition, 20.0f, this.paint);
drawTriangle(canvas, this.paint, this.tempPoint, this.chartYPosition);
}
}
private void drawTriangle(Canvas canvas, Paint paint, float startX, int startY) {
Path path = new Path();
path.moveTo(startX, (float) (startY - 20));
path.lineTo(startX, (float) (startY + 20));
path.lineTo(30.0f + startX, (float) startY);
path.lineTo(startX, (float) (startY - 20));
path.close();
canvas.drawPath(path, paint);
}
public void onMoveHorizontal(float dx) {
this.tempPoint = this.lastPointOnChart + dx;
invalidate();
}
public void onMoveVertical(float dy) {
}
public void onMovementStop() {
this.lastPointOnChart = this.tempPoint;
}
}
,這是我SwipeManager正在處理用戶的手勢:
public class SwipeManager implements View.OnTouchListener {
GestureReceiver receiver;
private int activePointer;
private float initX,
initY;
private long startTime,
stopTime;
private boolean resolving = false;
private boolean resolved = false;
private Direction direction;
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (receiver == null) throw new AssertionError("You must register a receiver");
switch (motionEvent.getActionMasked()) {
case ACTION_DOWN:
activePointer = motionEvent.getPointerId(0);
initX = motionEvent.getX(activePointer);
initY = motionEvent.getY(activePointer);
startTime = new Date().getTime();
break;
case ACTION_MOVE:
if (!resolving && !resolved) {
resolving = true;
float x = motionEvent.getX(activePointer);
float y = motionEvent.getY(activePointer);
direction = resolveDirection(x, y);
if (direction != Direction.STILL) {
resolved = true;
resolving = false;
} else {
resolving = false;
resolved = false;
}
break;
}
if (resolved) {
if (direction == Direction.HORIZONTAL)
receiver.onMoveHorizontal(motionEvent.getX(activePointer) - initX);
else receiver.onMoveVertical(motionEvent.getX(activePointer) - initY);
}
break;
case ACTION_UP:
resolved = false;
receiver.onMovementStop();
break;
}
return true;
}
private Direction resolveDirection(float x, float y) {
float dx = x - initX;
float dy = y - initY;
float absDx = Math.abs(dx);
float absDy = Math.abs(dy);
if (absDx > absDy + 10) {
return Direction.HORIZONTAL;
} else if (absDy > absDx + 10) {
return Direction.VERTICAL;
}
return Direction.STILL;
}
public void setReceiver(GestureReceiver receiver) {
this.receiver = receiver;
}
private enum Direction {HORIZONTAL, VERTICAL, STILL;}
}
,我並沒有啓動點類,因爲我對架構並不確定。
我想讓這個連接器爲這些類註冊所有的監聽器,然後等待一個改變並通知相應的改變類,比如新增的點或者刷卡開始和結束或者應用中的其他事件。
不要道歉,只是編輯問題,這樣可以回答 – AdamSkywalker
@AdamSkywalker我該如何編輯?我想我很清楚... –
從這個連接器寫一些代碼和您的期望 – AdamSkywalker