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Merge "Fix bounding rectangle of gesture preview trail"

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This commit is contained in:
Tadashi G. Takaoka 2013-01-16 02:58:50 -08:00 committed by Android (Google) Code Review
commit 5e45fbf0be
3 changed files with 29 additions and 38 deletions
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22
java/src/com/android/inputmethod/keyboard/internal/GesturePreviewTrail.java
View File

@ -138,6 +138,7 @@ final class GesturePreviewTrail {
}
private final RoundedLine mRoundedLine = new RoundedLine();
private final Rect mRoundedLineBounds = new Rect();
/**
* Draw gesture preview trail
@ -149,6 +150,8 @@ final class GesturePreviewTrail {
*/
public boolean drawGestureTrail(final Canvas canvas, final Paint paint,
final Rect outBoundsRect, final Params params) {
// Initialize bounds rectangle.
outBoundsRect.setEmpty();
final int trailSize = mEventTimes.getLength();
if (trailSize == 0) {
return false;
@ -171,39 +174,32 @@ final class GesturePreviewTrail {
if (startIndex < trailSize) {
paint.setColor(params.mTrailColor);
paint.setStyle(Paint.Style.FILL);
final RoundedLine line = mRoundedLine;
final RoundedLine roundedLine = mRoundedLine;
int p1x = getXCoordValue(xCoords[startIndex]);
int p1y = yCoords[startIndex];
final int lastTime = sinceDown - eventTimes[startIndex];
float maxWidth = getWidth(lastTime, params);
float r1 = maxWidth / 2.0f;
// Initialize bounds rectangle.
outBoundsRect.set(p1x, p1y, p1x, p1y);
float r1 = getWidth(lastTime, params) / 2.0f;
for (int i = startIndex + 1; i < trailSize; i++) {
final int elapsedTime = sinceDown - eventTimes[i];
final int p2x = getXCoordValue(xCoords[i]);
final int p2y = yCoords[i];
final float width = getWidth(elapsedTime, params);
final float r2 = width / 2.0f;
final float r2 = getWidth(elapsedTime, params) / 2.0f;
// Draw trail line only when the current point isn't a down point.
if (!isDownEventXCoord(xCoords[i])) {
final Path path = line.makePath(p1x, p1y, r1, p2x, p2y, r2);
final Path path = roundedLine.makePath(p1x, p1y, r1, p2x, p2y, r2);
if (path != null) {
final int alpha = getAlpha(elapsedTime, params);
paint.setAlpha(alpha);
canvas.drawPath(path, paint);
// Take union for the bounds.
outBoundsRect.union(p2x, p2y);
maxWidth = Math.max(maxWidth, width);
roundedLine.getBounds(mRoundedLineBounds);
outBoundsRect.union(mRoundedLineBounds);
}
}
p1x = p2x;
p1y = p2y;
r1 = r2;
}
// Take care of trail line width.
final int inset = -((int)maxWidth + 1);
outBoundsRect.inset(inset, inset);
}
final int newSize = trailSize - startIndex;

38
java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java
View File

@ -52,7 +52,8 @@ public final class PreviewPlacerView extends RelativeLayout {
private int mOffscreenOffsetY;
private Bitmap mOffscreenBuffer;
private final Canvas mOffscreenCanvas = new Canvas();
private final Rect mOffscreenDirtyRect = new Rect();
private final Rect mOffscreenSrcRect = new Rect();
private final Rect mDirtyRect = new Rect();
private final Rect mGesturePreviewTrailBoundsRect = new Rect(); // per trail
private final GestureFloatingPreviewText mGestureFloatingPreviewText;
private boolean mShowSlidingKeyInputPreview;
@ -193,6 +194,7 @@ public final class PreviewPlacerView extends RelativeLayout {
mOffscreenBuffer = Bitmap.createBitmap(
mOffscreenWidth, mOffscreenHeight, Bitmap.Config.ARGB_8888);
mOffscreenCanvas.setBitmap(mOffscreenBuffer);
mOffscreenCanvas.translate(0, mOffscreenOffsetY);
}
@Override
@ -205,19 +207,18 @@ public final class PreviewPlacerView extends RelativeLayout {
mayAllocateOffscreenBuffer();
// Draw gesture trails to offscreen buffer.
final boolean needsUpdatingGesturePreviewTrail = drawGestureTrails(
mOffscreenCanvas, mGesturePaint, mOffscreenDirtyRect);
// Transfer offscreen buffer to screen.
if (!mOffscreenDirtyRect.isEmpty()) {
canvas.translate(0, - mOffscreenOffsetY);
canvas.drawBitmap(mOffscreenBuffer, mOffscreenDirtyRect, mOffscreenDirtyRect,
mGesturePaint);
canvas.translate(0, mOffscreenOffsetY);
// Note: Defer clearing the dirty rectangle here because we will get cleared
// rectangle on the canvas.
}
mOffscreenCanvas, mGesturePaint, mDirtyRect);
if (needsUpdatingGesturePreviewTrail) {
mDrawingHandler.postUpdateGestureTrailPreview();
}
// Transfer offscreen buffer to screen.
if (!mDirtyRect.isEmpty()) {
mOffscreenSrcRect.set(mDirtyRect);
mOffscreenSrcRect.offset(0, mOffscreenOffsetY);
canvas.drawBitmap(mOffscreenBuffer, mOffscreenSrcRect, mDirtyRect, null);
// Note: Defer clearing the dirty rectangle here because we will get cleared
// rectangle on the canvas.
}
}
mGestureFloatingPreviewText.onDraw(canvas);
if (mShowSlidingKeyInputPreview) {
@ -235,10 +236,8 @@ public final class PreviewPlacerView extends RelativeLayout {
offscreenCanvas.drawRect(dirtyRect, paint);
}
dirtyRect.setEmpty();
// Draw gesture trails to offscreen buffer.
offscreenCanvas.translate(0, mOffscreenOffsetY);
boolean needsUpdatingGesturePreviewTrail = false;
// Draw gesture trails to offscreen buffer.
synchronized (mGesturePreviewTrails) {
// Trails count == fingers count that have ever been active.
final int trailsCount = mGesturePreviewTrails.size();
@ -251,20 +250,9 @@ public final class PreviewPlacerView extends RelativeLayout {
dirtyRect.union(mGesturePreviewTrailBoundsRect);
}
}
offscreenCanvas.translate(0, -mOffscreenOffsetY);
// Clip dirty rectangle with offscreen buffer width/height.
dirtyRect.offset(0, mOffscreenOffsetY);
clipRect(dirtyRect, 0, 0, mOffscreenWidth, mOffscreenHeight);
return needsUpdatingGesturePreviewTrail;
}
private static void clipRect(final Rect out, final int left, final int top, final int right,
final int bottom) {
out.set(Math.max(out.left, left), Math.max(out.top, top), Math.min(out.right, right),
Math.min(out.bottom, bottom));
}
public void setGestureFloatingPreviewText(final SuggestedWords suggestedWords) {
if (!mGestureFloatingPreviewText.isPreviewEnabled()) return;
mGestureFloatingPreviewText.setSuggetedWords(suggestedWords);

7
java/src/com/android/inputmethod/keyboard/internal/RoundedLine.java
View File

@ -15,6 +15,7 @@
package com.android.inputmethod.keyboard.internal;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
public final class RoundedLine {
@ -100,4 +101,10 @@ public final class RoundedLine {
mPath.close();
return mPath;
}
public void getBounds(final Rect outBounds) {
// Reuse mArc1 as working variable
mPath.computeBounds(mArc1, true /* unused */);
mArc1.roundOut(outBounds);
}
}