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Translate pointer event coordinates to screen coordinates. #72

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merged 2 commits into from
Sep 10, 2018
Merged

Translate pointer event coordinates to screen coordinates. #72

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8fe84f2
Translate pointer event coordinates to screen coordinates.
guillerodriguez Sep 5, 2018
c2d0e01
Fix previous commit.
guillerodriguez Sep 6, 2018
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12 changes: 8 additions & 4 deletions core/src/main/java/tripleplay/ui/util/XYFlicker.java
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@
import react.Signal;

import playn.scene.Pointer;
import playn.scene.Layer;
import playn.scene.LayerUtil;

/**
* Translates pointer input on a layer into an x, y offset. With a sufficiently large drag delta,
Expand Down Expand Up @@ -65,17 +67,18 @@ public IPoint position () {
_vel.set(0, 0);
_maxDeltaSq = 0;
_origPos.set(_position);
getPosition(iact.event, _start);
getPosition(iact, _start);
_prev.set(_start);
_cur.set(_start);
_prevStamp = 0;
_curStamp = iact.event.time;
_layer = iact.hitLayer;
}

@Override public void onDrag (Pointer.Interaction iact) {
_prev.set(_cur);
_prevStamp = _curStamp;
getPosition(iact.event, _cur);
getPosition(iact, _cur);
_curStamp = iact.event.time;
float dx = _cur.x - _start.x, dy = _cur.y - _start.y;
setPosition(_origPos.x + dx, _origPos.y + dy);
Expand Down Expand Up @@ -153,8 +156,8 @@ public void positionChanged (float x, float y) {
}

/** Translates a pointer event into a position. */
protected void getPosition (Pointer.Event event, Point dest) {
dest.set(-event.x(), -event.y());
protected void getPosition (Pointer.Interaction iact, Point dest) {
dest.set(-iact.local.x, -iact.local.y);
}

/** Sets the current position, clamping the values between min and max. */
Expand All @@ -179,4 +182,5 @@ protected static float applyAccelertion (float v, float a, float dt) {
protected final Point _start = new Point(), _cur = new Point(), _prev = new Point();
protected final Point _max = new Point(), _min = new Point();
protected double _prevStamp, _curStamp;
protected Layer _layer;
}