blob: 38b5dc121932e4e8e6f0b3e3f52ffc12dd0d78aa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
package org.libreoffice.canvas;
import android.graphics.Bitmap;
import android.graphics.PointF;
import org.libreoffice.LOKitShell;
import org.mozilla.gecko.gfx.ImmutableViewportMetrics;
/**
* Selection handle is a common class for "start", "middle" and "end" types
* of selection handles.
*/
public abstract class SelectionHandle extends BitmapHandle {
private static final long MINIMUM_HANDLE_UPDATE_TIME = 50 * 1000000;
private final PointF mDragStartPoint = new PointF();
private final PointF mDragDocumentPosition = new PointF();
private long mLastTime = 0;
public SelectionHandle(Bitmap bitmap) {
super(bitmap);
}
/**
* Start of a touch and drag action on the handle.
*/
public void dragStart(PointF point) {
mDragStartPoint.x = point.x;
mDragStartPoint.y = point.y;
mDragDocumentPosition.x = mDocumentPosition.left;
mDragDocumentPosition.y = mDocumentPosition.top;
}
/**
* End of a touch and drag action on the handle.
*/
public void dragEnd(PointF point) {
}
/**
* Handle has been dragged.
*/
public void dragging(PointF point) {
long currentTime = System.nanoTime();
if (currentTime - mLastTime > MINIMUM_HANDLE_UPDATE_TIME) {
mLastTime = currentTime;
signalHandleMove(point.x, point.y);
}
}
/**
* Signal to move the handle to a new position to LO.
*/
private void signalHandleMove(float newX, float newY) {
ImmutableViewportMetrics viewportMetrics = LOKitShell.getLayerView().getLayerClient().getViewportMetrics();
float zoom = viewportMetrics.zoomFactor;
float deltaX = (newX - mDragStartPoint.x) / zoom;
float deltaY = (newY - mDragStartPoint.y) / zoom;
PointF documentPoint = new PointF(mDragDocumentPosition.x + deltaX, mDragDocumentPosition.y + deltaY);
LOKitShell.sendChangeHandlePositionEvent(getHandleType(), documentPoint);
}
public abstract HandleType getHandleType();
public enum HandleType { START, MIDDLE, END }
}
|
