IconUtilitiespublic final class IconUtilities extends Object | Various utilities shared amongst the Launcher's classes. |
| Fields Summary |
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| private static final String | TAG | | private static final int[] | sColors | | private int | mIconWidth | | private int | mIconHeight | | private int | mIconTextureWidth | | private int | mIconTextureHeight | | private final android.graphics.Paint | mPaint | | private final android.graphics.Paint | mBlurPaint | | private final android.graphics.Paint | mGlowColorPressedPaint | | private final android.graphics.Paint | mGlowColorFocusedPaint | | private final android.graphics.Rect | mOldBounds | | private final android.graphics.Canvas | mCanvas | | private final android.util.DisplayMetrics | mDisplayMetrics | | private int | mColorIndex |
| Constructors Summary |
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public IconUtilities(android.content.Context context)
final Resources resources = context.getResources();
DisplayMetrics metrics = mDisplayMetrics = resources.getDisplayMetrics();
final float density = metrics.density;
final float blurPx = 5 * density;
mIconWidth = mIconHeight = (int) resources.getDimension(android.R.dimen.app_icon_size);
mIconTextureWidth = mIconTextureHeight = mIconWidth + (int)(blurPx*2);
mBlurPaint.setMaskFilter(new BlurMaskFilter(blurPx, BlurMaskFilter.Blur.NORMAL));
TypedValue value = new TypedValue();
mGlowColorPressedPaint.setColor(context.getTheme().resolveAttribute(
android.R.attr.colorPressedHighlight, value, true) ? value.data : 0xffffc300);
mGlowColorPressedPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
mGlowColorFocusedPaint.setColor(context.getTheme().resolveAttribute(
android.R.attr.colorFocusedHighlight, value, true) ? value.data : 0xffff8e00);
mGlowColorFocusedPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0.2f);
mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
Paint.FILTER_BITMAP_FLAG));
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| Methods Summary |
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| private android.graphics.Bitmap | createIconBitmap(android.graphics.drawable.Drawable icon)Returns a bitmap suitable for the all apps view. The bitmap will be a power
of two sized ARGB_8888 bitmap that can be used as a gl texture.
int width = mIconWidth;
int height = mIconHeight;
if (icon instanceof PaintDrawable) {
PaintDrawable painter = (PaintDrawable) icon;
painter.setIntrinsicWidth(width);
painter.setIntrinsicHeight(height);
} else if (icon instanceof BitmapDrawable) {
// Ensure the bitmap has a density.
BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
Bitmap bitmap = bitmapDrawable.getBitmap();
if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
bitmapDrawable.setTargetDensity(mDisplayMetrics);
}
}
int sourceWidth = icon.getIntrinsicWidth();
int sourceHeight = icon.getIntrinsicHeight();
if (sourceWidth > 0 && sourceHeight > 0) {
// There are intrinsic sizes.
if (width < sourceWidth || height < sourceHeight) {
// It's too big, scale it down.
final float ratio = (float) sourceWidth / sourceHeight;
if (sourceWidth > sourceHeight) {
height = (int) (width / ratio);
} else if (sourceHeight > sourceWidth) {
width = (int) (height * ratio);
}
} else if (sourceWidth < width && sourceHeight < height) {
// It's small, use the size they gave us.
width = sourceWidth;
height = sourceHeight;
}
}
// no intrinsic size --> use default size
int textureWidth = mIconTextureWidth;
int textureHeight = mIconTextureHeight;
final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight,
Bitmap.Config.ARGB_8888);
final Canvas canvas = mCanvas;
canvas.setBitmap(bitmap);
final int left = (textureWidth-width) / 2;
final int top = (textureHeight-height) / 2;
if (false) {
// draw a big box for the icon for debugging
canvas.drawColor(sColors[mColorIndex]);
if (++mColorIndex >= sColors.length) mColorIndex = 0;
Paint debugPaint = new Paint();
debugPaint.setColor(0xffcccc00);
canvas.drawRect(left, top, left+width, top+height, debugPaint);
}
mOldBounds.set(icon.getBounds());
icon.setBounds(left, top, left+width, top+height);
icon.draw(canvas);
icon.setBounds(mOldBounds);
return bitmap;
| | public android.graphics.drawable.Drawable | createIconDrawable(android.graphics.drawable.Drawable src)
Bitmap scaled = createIconBitmap(src);
StateListDrawable result = new StateListDrawable();
result.addState(new int[] { android.R.attr.state_focused },
new BitmapDrawable(createSelectedBitmap(scaled, false)));
result.addState(new int[] { android.R.attr.state_pressed },
new BitmapDrawable(createSelectedBitmap(scaled, true)));
result.addState(new int[0], new BitmapDrawable(scaled));
result.setBounds(0, 0, mIconTextureWidth, mIconTextureHeight);
return result;
| | private android.graphics.Bitmap | createSelectedBitmap(android.graphics.Bitmap src, boolean pressed)
final Bitmap result = Bitmap.createBitmap(mIconTextureWidth, mIconTextureHeight,
Bitmap.Config.ARGB_8888);
final Canvas dest = new Canvas(result);
dest.drawColor(0, PorterDuff.Mode.CLEAR);
int[] xy = new int[2];
Bitmap mask = src.extractAlpha(mBlurPaint, xy);
dest.drawBitmap(mask, xy[0], xy[1],
pressed ? mGlowColorPressedPaint : mGlowColorFocusedPaint);
mask.recycle();
dest.drawBitmap(src, 0, 0, mPaint);
dest.setBitmap(null);
return result;
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