Use GestureDetector to handle touch events
This commit is contained in:
Manuel Fuhr
parent
b8496ffe5e
commit
712bff8459
1 changed files with 108 additions and 126 deletions
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@ -1,5 +1,6 @@
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package btools.routingapp;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.res.AssetManager;
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import android.graphics.Bitmap;
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@ -9,7 +10,9 @@ import android.graphics.Color;
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import android.graphics.Matrix;
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import android.graphics.Paint;
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import android.util.AttributeSet;
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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 java.io.File;
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@ -24,25 +27,25 @@ public class BInstallerView extends View {
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public static final int MASK_DELETED_RD5 = 2;
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public static final int MASK_INSTALLED_RD5 = 4;
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public static final int MASK_CURRENT_RD5 = 8;
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private static final float SCALE_GRID_VISIBLE = 3;
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private final Bitmap bmp;
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private final float[] testVector = new float[2];
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private final int[] tileStatus;
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private final File segmentDir;
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private final Matrix mat;
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private final Bitmap bmp;
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private final int[] tileStatus;
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private final float[] testVector = new float[2];
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private final Matrix matText;
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private final GestureDetector mGestureDetector;
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private final ScaleGestureDetector mScaleGestureDetector;
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Paint pnt_1 = new Paint();
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Paint pnt_2 = new Paint();
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Paint paint = new Paint();
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int btnh = 40;
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int btnw = 160;
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float tx, ty;
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private int imgwOrig;
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private int imghOrig;
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private float scaleOrig;
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private int imgw;
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private int imgh;
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private float lastDownX;
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private float lastDownY;
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private float viewscale;
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private boolean tilesVisible = false;
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private long availableSize;
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@ -69,6 +72,21 @@ public class BInstallerView extends View {
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tileStatus = new int[72 * 36];
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matText = new Matrix();
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mat = new Matrix();
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mGestureDetector = new GestureDetector(context, new GestureListener());
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mScaleGestureDetector = new ScaleGestureDetector(context, new ScaleGestureListener());
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}
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private void setRatio(float ratio, float focusX, float focusY) {
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mat.postScale(ratio, ratio, focusX, focusY);
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fitBounds();
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tilesVisible = currentScale() >= SCALE_GRID_VISIBLE;
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invalidate();
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}
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private void setScale(float scale, float focusX, float focusY) {
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float ratio = scale / currentScale();
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setRatio(ratio, focusX, focusY);
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}
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public void setAvailableSize(long availableSize) {
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@ -142,9 +160,9 @@ public class BInstallerView extends View {
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imgh = (int) (imghOrig / scaleOrig);
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float scaleX = imgwOrig / ((float) bmp.getWidth());
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float scaley = imghOrig / ((float) bmp.getHeight());
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float scaleY = imghOrig / ((float) bmp.getHeight());
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viewscale = Math.min(scaleX, scaley);
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viewscale = Math.min(scaleX, scaleY);
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mat.postScale(viewscale, viewscale);
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tilesVisible = false;
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@ -260,120 +278,55 @@ public class BInstallerView extends View {
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}
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}
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private void fitBounds() {
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float[] srcPoints = new float[]{
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0, 0,
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bmp.getWidth(), bmp.getHeight()
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};
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float[] dstPoints = new float[srcPoints.length];
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float transX = 0;
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float transY = 0;
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mat.mapPoints(dstPoints, srcPoints);
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if (dstPoints[0] > 0) {
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transX = -dstPoints[0];
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} else if (dstPoints[2] < getWidth()) {
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transX = getWidth() - dstPoints[2];
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}
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if (dstPoints[1] > 0) {
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transY = -dstPoints[1];
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} else if (dstPoints[3] < getHeight()) {
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transY = getHeight() - dstPoints[3];
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}
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if (transX != 0 || transY != 0) {
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mat.postTranslate(transX, transY);
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}
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}
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@SuppressLint("ClickableViewAccessibility")
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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boolean retVal = mScaleGestureDetector.onTouchEvent(event);
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retVal = mGestureDetector.onTouchEvent(event) || retVal;
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return retVal || super.onTouchEvent(event);
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}
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// get masked (not specific to a pointer) action
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int maskedAction = event.getActionMasked();
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class GestureListener extends GestureDetector.SimpleOnGestureListener {
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switch (maskedAction) {
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case MotionEvent.ACTION_DOWN:
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case MotionEvent.ACTION_POINTER_DOWN: {
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lastDownX = event.getX();
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lastDownY = event.getY();
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break;
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@Override
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public boolean onSingleTapConfirmed(MotionEvent e) {
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// Download Button
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if ((delTiles > 0 || rd5Tiles >= 0) && e.getX() > imgwOrig - btnw * scaleOrig && e.getY() > imghOrig - btnh * scaleOrig) {
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if (mOnClickListener != null) {
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mOnClickListener.onClick(null);
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}
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invalidate();
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return true;
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}
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case MotionEvent.ACTION_MOVE: { // a pointer was moved
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int np = event.getPointerCount();
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int nh = event.getHistorySize();
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if (nh == 0) break;
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float x0 = event.getX(0);
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float y0 = event.getY(0);
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float hx0 = event.getHistoricalX(0, 0);
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float hy0 = event.getHistoricalY(0, 0);
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if (np > 1) // multi-touch
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{
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float x1 = event.getX(1);
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float y1 = event.getY(1);
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float hx1 = event.getHistoricalX(1, 0);
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float hy1 = event.getHistoricalY(1, 0);
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float r = (float) Math.sqrt((x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0));
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float hr = (float) Math.sqrt((hx1 - hx0) * (hx1 - hx0) + (hy1 - hy0) * (hy1 - hy0));
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if (hr > 0.) {
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float ratio = r / hr;
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float mx = (x1 + x0) / 2.f;
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float my = (y1 + y0) / 2.f;
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float scale = currentScale();
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float newscale = scale * ratio;
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if (newscale > 10.f) ratio *= (10.f / newscale);
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if (newscale < 0.5f) ratio *= (0.5f / newscale);
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mat.postScale(ratio, ratio, mx, my);
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mat.postScale(ratio, ratio, mx, my);
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boolean tilesv = currentScale() >= 3.f;
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if (tilesVisible && !tilesv) {
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clearAllTilesStatus(MASK_SELECTED_RD5 | MASK_DELETED_RD5);
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}
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tilesVisible = tilesv;
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}
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break;
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}
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mat.postTranslate(x0 - hx0, y0 - hy0);
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break;
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}
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case MotionEvent.ACTION_UP:
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long downTime = event.getEventTime() - event.getDownTime();
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if (downTime < 5 || downTime > 500) {
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break;
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}
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if (Math.abs(lastDownX - event.getX()) > 10 || Math.abs(lastDownY - event.getY()) > 10) {
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break;
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}
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// download button?
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if ((delTiles > 0 || rd5Tiles >= 0) && event.getX() > imgwOrig - btnw * scaleOrig && event.getY() > imghOrig - btnh * scaleOrig) {
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if (rd5Tiles == 0) {
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for (int ix = 0; ix < 72; ix++) {
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for (int iy = 0; iy < 36; iy++) {
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int tidx = gridPos2Tileindex(ix, iy);
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if (tidx != -1) {
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if ((tileStatus[tidx] & MASK_INSTALLED_RD5) != 0) {
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tileStatus[tidx] |= MASK_SELECTED_RD5;
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}
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}
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}
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}
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}
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if (mOnClickListener != null) {
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mOnClickListener.onClick(null);
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}
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invalidate();
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break;
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}
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if (!tilesVisible) {
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float scale = currentScale();
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if (scale > 0f && scale < 5f) {
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float ratio = 5f / scale;
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mat.postScale(ratio, ratio, event.getX(), event.getY());
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tilesVisible = true;
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}
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break;
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}
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if (tilesVisible) {
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Matrix imat = new Matrix();
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if (mat.invert(imat)) {
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float[] touchpoint = new float[2];
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touchpoint[0] = event.getX();
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touchpoint[1] = event.getY();
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float[] touchpoint = {e.getX(), e.getY()};
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imat.mapPoints(touchpoint);
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int tidx = tileIndex(touchpoint[0], touchpoint[1]);
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@ -389,23 +342,52 @@ public class BInstallerView extends View {
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tileStatus[tidx] ^= MASK_SELECTED_RD5;
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}
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}
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tx = touchpoint[0];
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ty = touchpoint[1];
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}
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break;
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case MotionEvent.ACTION_POINTER_UP:
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case MotionEvent.ACTION_CANCEL: {
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// TODO use data
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break;
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invalidate();
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}
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return true;
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}
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invalidate();
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return true;
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@Override
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public boolean onDoubleTap(MotionEvent e) {
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if (!tilesVisible) {
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setScale(5, e.getX(), e.getY());
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} else {
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setScale(1, e.getX(), e.getY());
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}
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return true;
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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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mat.postTranslate(-distanceX, -distanceY);
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fitBounds();
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invalidate();
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return true;
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}
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}
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class ScaleGestureListener implements ScaleGestureDetector.OnScaleGestureListener {
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@Override
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public boolean onScaleBegin(ScaleGestureDetector scaleGestureDetector) {
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return true;
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}
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@Override
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public boolean onScale(ScaleGestureDetector scaleGestureDetector) {
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float focusX = scaleGestureDetector.getFocusX();
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float focusY = scaleGestureDetector.getFocusY();
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float ratio = scaleGestureDetector.getScaleFactor();
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setRatio(ratio, focusX, focusY);
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return true;
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}
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@Override
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public void onScaleEnd(ScaleGestureDetector scaleGestureDetector) {
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}
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}
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}
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