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platform_packages_apps_Launcher3
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Creating AllAppsBackgroundDrawable using DrawableFactory to allow 

easier overriding using derivative projects

Change-Id: I7265d888876ea0928391f76ec1bcb7d928c0f27a
This commit is contained in:
Sunny Goyal 2017-01-08 13:13:47 -08:00
parent 2c3194e879
commit 260b07fa86
3 changed files with 76 additions and 56 deletions
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112
src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java
View File

@ -23,62 +23,10 @@ import android.graphics.ColorFilter;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import com.android.launcher3.R;
/**
* A helper class to positon and orient a drawable to be drawn.
*/
class TransformedImageDrawable {
private Drawable mImage;
private float mXPercent;
private float mYPercent;
private int mGravity;
private int mAlpha;
/**
* @param gravity If one of the Gravity center values, the x and y offset will take the width
* and height of the image into account to center the image to the offset.
*/
public TransformedImageDrawable(Resources res, int resourceId, float xPct, float yPct,
int gravity) {
mImage = res.getDrawable(resourceId);
mXPercent = xPct;
mYPercent = yPct;
mGravity = gravity;
}
public void setAlpha(int alpha) {
mImage.setAlpha(alpha);
mAlpha = alpha;
}
public int getAlpha() {
return mAlpha;
}
public void updateBounds(Rect bounds) {
int width = mImage.getIntrinsicWidth();
int height = mImage.getIntrinsicHeight();
int left = bounds.left + (int) (mXPercent * bounds.width());
int top = bounds.top + (int) (mYPercent * bounds.height());
if ((mGravity & Gravity.CENTER_HORIZONTAL) == Gravity.CENTER_HORIZONTAL) {
left -= (width / 2);
}
if ((mGravity & Gravity.CENTER_VERTICAL) == Gravity.CENTER_VERTICAL) {
top -= (height / 2);
}
mImage.setBounds(left, top, left + width, top + height);
}
public void draw(Canvas canvas) {
int c = canvas.save(Canvas.MATRIX_SAVE_FLAG);
mImage.draw(canvas);
canvas.restoreToCount(c);
}
}
/**
* This is a custom composite drawable that has a fixed virtual size and dynamically lays out its
* children images relatively within its bounds. This way, we can reduce the memory usage of a
@ -86,8 +34,62 @@ class TransformedImageDrawable {
*/
public class AllAppsBackgroundDrawable extends Drawable {
private final TransformedImageDrawable mHand;
private final TransformedImageDrawable[] mIcons;
/**
* A helper class to positon and orient a drawable to be drawn.
*/
protected static class TransformedImageDrawable {
private Drawable mImage;
private float mXPercent;
private float mYPercent;
private int mGravity;
private int mAlpha;
/**
* @param gravity If one of the Gravity center values, the x and y offset will take the width
* and height of the image into account to center the image to the offset.
*/
public TransformedImageDrawable(Resources res, int resourceId, float xPct, float yPct,
int gravity) {
mImage = res.getDrawable(resourceId);
mXPercent = xPct;
mYPercent = yPct;
mGravity = gravity;
}
public void setAlpha(int alpha) {
mImage.setAlpha(alpha);
mAlpha = alpha;
}
public int getAlpha() {
return mAlpha;
}
public void updateBounds(Rect bounds) {
int width = mImage.getIntrinsicWidth();
int height = mImage.getIntrinsicHeight();
int left = bounds.left + (int) (mXPercent * bounds.width());
int top = bounds.top + (int) (mYPercent * bounds.height());
if ((mGravity & Gravity.CENTER_HORIZONTAL) == Gravity.CENTER_HORIZONTAL) {
left -= (width / 2);
}
if ((mGravity & Gravity.CENTER_VERTICAL) == Gravity.CENTER_VERTICAL) {
top -= (height / 2);
}
mImage.setBounds(left, top, left + width, top + height);
}
public void draw(Canvas canvas) {
mImage.draw(canvas);
}
public Rect getBounds() {
return mImage.getBounds();
}
}
protected final TransformedImageDrawable mHand;
protected final TransformedImageDrawable[] mIcons;
private final int mWidth;
private final int mHeight;

15
src/com/android/launcher3/allapps/AllAppsRecyclerView.java
View File

@ -22,6 +22,7 @@ import android.graphics.drawable.Drawable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.util.SparseIntArray;
import android.view.MotionEvent;
import android.view.View;
import com.android.launcher3.BaseRecyclerView;
@ -29,6 +30,7 @@ import com.android.launcher3.BubbleTextView;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.Launcher;
import com.android.launcher3.R;
import com.android.launcher3.graphics.DrawableFactory;
import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
import java.util.List;
@ -207,7 +209,8 @@ public class AllAppsRecyclerView extends BaseRecyclerView {
if (mApps.hasNoFilteredResults()) {
if (mEmptySearchBackground == null) {
mEmptySearchBackground = new AllAppsBackgroundDrawable(getContext());
mEmptySearchBackground = DrawableFactory.get(getContext())
.getAllAppsBackground(getContext());
mEmptySearchBackground.setAlpha(0);
mEmptySearchBackground.setCallback(this);
updateEmptySearchBackgroundBounds();
@ -220,6 +223,16 @@ public class AllAppsRecyclerView extends BaseRecyclerView {
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
boolean result = super.onInterceptTouchEvent(e);
if (!result && e.getAction() == MotionEvent.ACTION_DOWN
&& mEmptySearchBackground != null && mEmptySearchBackground.getAlpha() > 0) {
mEmptySearchBackground.setHotspot(e.getX(), e.getY());
}
return result;
}
/**
* Maps the touch (from 0..1) to the adapter position that should be visible.
*/

5
src/com/android/launcher3/graphics/DrawableFactory.java
View File

@ -23,6 +23,7 @@ import com.android.launcher3.FastBitmapDrawable;
import com.android.launcher3.ItemInfo;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.allapps.AllAppsBackgroundDrawable;
/**
* Factory for creating new drawables.
@ -50,4 +51,8 @@ public class DrawableFactory {
d.setFilterBitmap(true);
return d;
}
public AllAppsBackgroundDrawable getAllAppsBackground(Context context) {
return new AllAppsBackgroundDrawable(context);
}
}