SubtitleViewpublic class SubtitleView extends android.view.View
| Fields Summary |
|---|
| private static final float | INNER_PADDING_RATIO | | private static final int | COLOR_BEVEL_DARKColor used for the shadowed edge of a bevel. | | private static final int | COLOR_BEVEL_LIGHTColor used for the illuminated edge of a bevel. | | private final float | mCornerRadius | | private final float | mOutlineWidth | | private final float | mShadowRadius | | private final float | mShadowOffsetX | | private final float | mShadowOffsetY | | private final android.graphics.RectF | mLineBoundsTemporary rectangle used for computing line bounds. | | private final StringBuilder | mTextReusable string builder used for holding text. | | private android.text.Layout.Alignment | mAlignment | | private android.text.TextPaint | mTextPaint | | private android.graphics.Paint | mPaint | | private int | mForegroundColor | | private int | mBackgroundColor | | private int | mEdgeColor | | private int | mEdgeType | | private boolean | mHasMeasurements | | private int | mLastMeasuredWidth | | private android.text.StaticLayout | mLayout | | private float | mSpacingMult | | private float | mSpacingAdd | | private int | mInnerPaddingX |
| Constructors Summary |
|---|
public SubtitleView(android.content.Context context)
this(context, null);
| public SubtitleView(android.content.Context context, android.util.AttributeSet attrs)
this(context, attrs, 0);
| public SubtitleView(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr)
this(context, attrs, defStyleAttr, 0);
| public SubtitleView(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr, int defStyleRes)
super(context, attrs);
final TypedArray a = context.obtainStyledAttributes(
attrs, android.R.styleable.TextView, defStyleAttr, defStyleRes);
CharSequence text = "";
int textSize = 15;
final int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = a.getIndex(i);
switch (attr) {
case android.R.styleable.TextView_text:
text = a.getText(attr);
break;
case android.R.styleable.TextView_lineSpacingExtra:
mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
break;
case android.R.styleable.TextView_lineSpacingMultiplier:
mSpacingMult = a.getFloat(attr, mSpacingMult);
break;
case android.R.styleable.TextAppearance_textSize:
textSize = a.getDimensionPixelSize(attr, textSize);
break;
}
}
// Set up density-dependent properties.
// TODO: Move these to a default style.
final Resources res = getContext().getResources();
mCornerRadius = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_corner_radius);
mOutlineWidth = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_outline_width);
mShadowRadius = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_shadow_radius);
mShadowOffsetX = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_shadow_offset);
mShadowOffsetY = mShadowOffsetX;
mTextPaint = new TextPaint();
mTextPaint.setAntiAlias(true);
mTextPaint.setSubpixelText(true);
mPaint = new Paint();
mPaint.setAntiAlias(true);
setText(text);
setTextSize(textSize);
|
| Methods Summary |
|---|
| private boolean | computeMeasurements(int maxWidth)
if (mHasMeasurements && maxWidth == mLastMeasuredWidth) {
return true;
}
// Account for padding.
final int paddingX = mPaddingLeft + mPaddingRight + mInnerPaddingX * 2;
maxWidth -= paddingX;
if (maxWidth <= 0) {
return false;
}
// TODO: Implement minimum-difference line wrapping. Adding the results
// of Paint.getTextWidths() seems to return different values than
// StaticLayout.getWidth(), so this is non-trivial.
mHasMeasurements = true;
mLastMeasuredWidth = maxWidth;
mLayout = new StaticLayout(
mText, mTextPaint, maxWidth, mAlignment, mSpacingMult, mSpacingAdd, true);
return true;
| | protected void | onDraw(android.graphics.Canvas c)
final StaticLayout layout = mLayout;
if (layout == null) {
return;
}
final int saveCount = c.save();
final int innerPaddingX = mInnerPaddingX;
c.translate(mPaddingLeft + innerPaddingX, mPaddingTop);
final int lineCount = layout.getLineCount();
final Paint textPaint = mTextPaint;
final Paint paint = mPaint;
final RectF bounds = mLineBounds;
if (Color.alpha(mBackgroundColor) > 0) {
final float cornerRadius = mCornerRadius;
float previousBottom = layout.getLineTop(0);
paint.setColor(mBackgroundColor);
paint.setStyle(Style.FILL);
for (int i = 0; i < lineCount; i++) {
bounds.left = layout.getLineLeft(i) -innerPaddingX;
bounds.right = layout.getLineRight(i) + innerPaddingX;
bounds.top = previousBottom;
bounds.bottom = layout.getLineBottom(i);
previousBottom = bounds.bottom;
c.drawRoundRect(bounds, cornerRadius, cornerRadius, paint);
}
}
final int edgeType = mEdgeType;
if (edgeType == CaptionStyle.EDGE_TYPE_OUTLINE) {
textPaint.setStrokeJoin(Join.ROUND);
textPaint.setStrokeWidth(mOutlineWidth);
textPaint.setColor(mEdgeColor);
textPaint.setStyle(Style.FILL_AND_STROKE);
for (int i = 0; i < lineCount; i++) {
layout.drawText(c, i, i);
}
} else if (edgeType == CaptionStyle.EDGE_TYPE_DROP_SHADOW) {
textPaint.setShadowLayer(mShadowRadius, mShadowOffsetX, mShadowOffsetY, mEdgeColor);
} else if (edgeType == CaptionStyle.EDGE_TYPE_RAISED
|| edgeType == CaptionStyle.EDGE_TYPE_DEPRESSED) {
final boolean raised = edgeType == CaptionStyle.EDGE_TYPE_RAISED;
final int colorUp = raised ? Color.WHITE : mEdgeColor;
final int colorDown = raised ? mEdgeColor : Color.WHITE;
final float offset = mShadowRadius / 2f;
textPaint.setColor(mForegroundColor);
textPaint.setStyle(Style.FILL);
textPaint.setShadowLayer(mShadowRadius, -offset, -offset, colorUp);
for (int i = 0; i < lineCount; i++) {
layout.drawText(c, i, i);
}
textPaint.setShadowLayer(mShadowRadius, offset, offset, colorDown);
}
textPaint.setColor(mForegroundColor);
textPaint.setStyle(Style.FILL);
for (int i = 0; i < lineCount; i++) {
layout.drawText(c, i, i);
}
textPaint.setShadowLayer(0, 0, 0, 0);
c.restoreToCount(saveCount);
| | public void | onLayout(boolean changed, int l, int t, int r, int b)
final int width = r - l;
computeMeasurements(width);
| | protected void | onMeasure(int widthMeasureSpec, int heightMeasureSpec)
final int widthSpec = MeasureSpec.getSize(widthMeasureSpec);
if (computeMeasurements(widthSpec)) {
final StaticLayout layout = mLayout;
// Account for padding.
final int paddingX = mPaddingLeft + mPaddingRight + mInnerPaddingX * 2;
final int width = layout.getWidth() + paddingX;
final int height = layout.getHeight() + mPaddingTop + mPaddingBottom;
setMeasuredDimension(width, height);
} else {
setMeasuredDimension(MEASURED_STATE_TOO_SMALL, MEASURED_STATE_TOO_SMALL);
}
| | public void | setAlignment(android.text.Layout.Alignment textAlignment)
if (mAlignment != textAlignment) {
mAlignment = textAlignment;
mHasMeasurements = false;
requestLayout();
invalidate();
}
| | public void | setBackgroundColor(int color)
mBackgroundColor = color;
invalidate();
| | public void | setEdgeColor(int color)
mEdgeColor = color;
invalidate();
| | public void | setEdgeType(int edgeType)
mEdgeType = edgeType;
invalidate();
| | public void | setForegroundColor(int color)
mForegroundColor = color;
invalidate();
| | public void | setStyle(int styleId)
final Context context = mContext;
final ContentResolver cr = context.getContentResolver();
final CaptionStyle style;
if (styleId == CaptionStyle.PRESET_CUSTOM) {
style = CaptionStyle.getCustomStyle(cr);
} else {
style = CaptionStyle.PRESETS[styleId];
}
final CaptionStyle defStyle = CaptionStyle.DEFAULT;
mForegroundColor = style.hasForegroundColor() ?
style.foregroundColor : defStyle.foregroundColor;
mBackgroundColor = style.hasBackgroundColor() ?
style.backgroundColor : defStyle.backgroundColor;
mEdgeType = style.hasEdgeType() ? style.edgeType : defStyle.edgeType;
mEdgeColor = style.hasEdgeColor() ? style.edgeColor : defStyle.edgeColor;
mHasMeasurements = false;
final Typeface typeface = style.getTypeface();
setTypeface(typeface);
requestLayout();
| | public void | setText(int resId)
final CharSequence text = getContext().getText(resId);
setText(text);
| | public void | setText(java.lang.CharSequence text)
mText.setLength(0);
mText.append(text);
mHasMeasurements = false;
requestLayout();
invalidate();
| | public void | setTextSize(float size)Sets the text size in pixels.
if (mTextPaint.getTextSize() != size) {
mTextPaint.setTextSize(size);
mInnerPaddingX = (int) (size * INNER_PADDING_RATIO + 0.5f);
mHasMeasurements = false;
requestLayout();
invalidate();
}
| | public void | setTypeface(android.graphics.Typeface typeface)
if (mTextPaint.getTypeface() != typeface) {
mTextPaint.setTypeface(typeface);
mHasMeasurements = false;
requestLayout();
invalidate();
}
|
|
