package com.mm.android.deviceaddmodule.mobilecommon.widget.linechart.touch;
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import android.graphics.RectF;
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import android.view.GestureDetector;
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import android.view.MotionEvent;
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import android.view.ScaleGestureDetector;
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import android.view.View;
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import android.view.ViewParent;
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import com.mm.android.deviceaddmodule.mobilecommon.widget.linechart.charts.LineChart;
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import com.mm.android.deviceaddmodule.mobilecommon.widget.linechart.manager.MappingManager;
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import com.mm.android.deviceaddmodule.mobilecommon.widget.linechart.utils.RectD;
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public class GodTouchListener implements View.OnTouchListener {
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GestureDetector _GestureDetector;
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ScaleGestureDetector _ScaleGestureDetector;
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LineChart _LineChart;
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public GodTouchListener(LineChart lineChart) {
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_LineChart = lineChart;
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_GestureDetector = new GestureDetector(lineChart.getContext(), new GestureListener());
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_ScaleGestureDetector = new ScaleGestureDetector(lineChart.getContext(), new ScaleListener());
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}
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@Override
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public boolean onTouch(View v, MotionEvent event) {
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ViewParent parent = v.getParent();
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if (parent != null) {
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parent.requestDisallowInterceptTouchEvent(true);
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}
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boolean hit = _GestureDetector.onTouchEvent(event);
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hit |= _ScaleGestureDetector.onTouchEvent(event);
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if (hit) {
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_LineChart.invalidate();
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return true;
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}
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return false;
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}
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class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
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float _lastSpanX, _lastSpanY;
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public ScaleListener() {
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super();
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}
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@Override
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public boolean onScale(ScaleGestureDetector detector) {
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float spanX = detector.getCurrentSpanX();
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float kx = spanX / _lastSpanX;
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float spanY = detector.getCurrentSpanY();
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float ky = spanY / _lastSpanY;
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RectF godRect = _LineChart.get_GodRect();
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RectF mainRect = _LineChart.get_MainPlotRect();
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godRect.right = godRect.left + godRect.width() * kx;
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godRect.bottom = godRect.top + godRect.height() * ky;
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constrainRect(godRect, mainRect);
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nofityViewPortChanged(godRect);
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_lastSpanX = spanX;
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_lastSpanY = spanY;
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return true;
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}
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@Override
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public boolean onScaleBegin(ScaleGestureDetector detector) {
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_lastSpanX = detector.getCurrentSpanX();
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_lastSpanY = detector.getCurrentSpanY();
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return true;
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}
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@Override
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public void onScaleEnd(ScaleGestureDetector detector) {
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super.onScaleEnd(detector);
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}
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}
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RectD _rectD_ob = new RectD();
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class GestureListener extends GestureDetector.SimpleOnGestureListener {
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@Override
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public boolean onDoubleTap(MotionEvent e) {
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return super.onDoubleTap(e);
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}
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@Override
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public boolean onDown(MotionEvent e) {
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return true;
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}
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@Override
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public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
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return super.onFling(e1, e2, velocityX, velocityY);
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}
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@Override
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public void onLongPress(MotionEvent e) {
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super.onLongPress(e);
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}
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@Override
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public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
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RectF godRect = _LineChart.get_GodRect();
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RectF mainRect = _LineChart.get_MainPlotRect();
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float w = godRect.width();
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float h = godRect.height();
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godRect.left += -distanceX;
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godRect.right = godRect.left + w;
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godRect.top += -distanceY;
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godRect.bottom = godRect.top + h;
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constrainRect(godRect, mainRect);
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nofityViewPortChanged(godRect);
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return true;
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}
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@Override
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public boolean onSingleTapConfirmed(MotionEvent e) {
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return super.onSingleTapConfirmed(e);
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}
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}
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private void nofityViewPortChanged(RectF godRect) {
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// 计算出godRect对应的viewport
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MappingManager mappingManager = _LineChart.get_MappingManager();
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double left = mappingManager.p2v_x(godRect.left);
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double right = mappingManager.p2v_x(godRect.right);
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double bottom = mappingManager.p2v_y(godRect.bottom);
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double top = mappingManager.p2v_y(godRect.top);
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_rectD_ob.left = left;
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_rectD_ob.top = top;
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_rectD_ob.right = right;
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_rectD_ob.bottom = bottom;
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_LineChart.notifyOB_ViewportChanged(_rectD_ob);
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}
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private void constrainRect(RectF godRect, RectF maxRect) {
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float w = godRect.width();
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float h = godRect.height();
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// 1. 保持比例
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if (godRect.left < maxRect.left) {
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godRect.left = maxRect.left;
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godRect.right = godRect.left + w;
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}
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if (godRect.top < maxRect.top) {
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godRect.top = maxRect.top;
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godRect.bottom = godRect.top + h;
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}
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if (godRect.right > maxRect.right) {
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godRect.right = maxRect.right;
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godRect.left = godRect.right - w;
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}
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if (godRect.bottom > maxRect.bottom) {
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godRect.bottom = maxRect.bottom;
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godRect.top = godRect.bottom - h;
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}
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// 2. 限定值的范围
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if (godRect.left < maxRect.left) {
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godRect.left = maxRect.left;
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}
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if (godRect.top < maxRect.top) {
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godRect.top = maxRect.top;
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}
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if (godRect.right > maxRect.right) {
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godRect.right = maxRect.right;
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}
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if (godRect.bottom > maxRect.bottom) {
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godRect.bottom = maxRect.bottom;
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}
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}
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}
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