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fix touch to focus by rotating the matrix

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This commit is contained in:
tibbi 2016-04-18 13:33:35 +02:00
parent b319fcb8b5
commit a08e526815
1 changed files with 11 additions and 16 deletions
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27
app/src/main/java/com/simplemobiletools/camera/Preview.java
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@ -162,8 +162,7 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
return; return;
camera.cancelAutoFocus(); camera.cancelAutoFocus();
Rect focusRect = calculateFocusArea(event.getX(), event.getY()); final Rect focusRect = calculateFocusArea(event.getX(), event.getY());
final Camera.Parameters parameters = camera.getParameters(); final Camera.Parameters parameters = camera.getParameters();
if (parameters.getMaxNumFocusAreas() > 0) { if (parameters.getMaxNumFocusAreas() > 0) {
final List<Camera.Area> focusAreas = new ArrayList<>(1); final List<Camera.Area> focusAreas = new ArrayList<>(1);
@ -183,22 +182,18 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
} }
private Rect calculateFocusArea(float x, float y) { private Rect calculateFocusArea(float x, float y) {
int left = clamp(Float.valueOf((x / surfaceView.getWidth()) * 2000 - 1000).intValue()); int left = Float.valueOf((x / surfaceView.getWidth()) * 2000 - 1000).intValue();
int top = clamp(Float.valueOf((y / surfaceView.getHeight()) * 2000 - 1000).intValue()); int top = Float.valueOf((y / surfaceView.getHeight()) * 2000 - 1000).intValue();
return new Rect(left, top, Math.min(left + FOCUS_AREA_SIZE, 1000), Math.min(top + FOCUS_AREA_SIZE, 1000)); int tmp = left;
} left = top;
top = -tmp;
private int clamp(int touchCoord) { final int rectLeft = Math.max(left - FOCUS_AREA_SIZE / 2, -1000);
if (Math.abs(touchCoord) + FOCUS_AREA_SIZE / 2 > 1000) { final int rectTop = Math.max(top - FOCUS_AREA_SIZE / 2, -1000);
if (touchCoord > 0) { final int rectRight = Math.min(left + FOCUS_AREA_SIZE / 2, 1000);
return 1000 - FOCUS_AREA_SIZE / 2; final int rectBottom = Math.min(top + FOCUS_AREA_SIZE / 2, 1000);
} else { return new Rect(rectLeft, rectTop, rectRight, rectBottom);
return -1000 + FOCUS_AREA_SIZE / 2;
}
}
return touchCoord - FOCUS_AREA_SIZE / 2;
} }
public void releaseCamera() { public void releaseCamera() {