@Override
public void onDraw(final Canvas c) {
// Draw the alpha pattern
mAlphaPattern.draw(c);
// Draw the shader that shows how transparent a colors looks at a given alpha on top of the
// alpha pattern
shaderPaint.setShader(
new LinearGradient(
borderSize, 0, this.getWidth() - borderSize, 0, 0, color, TileMode.CLAMP));
c.drawRect(
borderSize,
borderSize,
this.getWidth() - borderSize,
this.getHeight() - borderSize,
shaderPaint);
// Draw the transparency label on top of that stuff
c.drawText(
"Transparency",
this.getWidth() / 2,
this.getHeight() / 2 + labelPaint.getTextSize() / 2.0f,
labelPaint);
// Draw the alpha tracker on top of everything else
final float xPos = alphaToXPos(alpha);
final float rectWidth = 2 * mDensity;
final RectF r = new RectF();
r.left = xPos - rectWidth;
r.right = xPos + rectWidth;
r.top = 0;
r.bottom = this.getHeight();
c.drawRoundRect(r, rectWidth, rectWidth, trackerPaint);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mAlphaPattern = new AlphaPatternDrawable((int) (5 * mDensity));
mAlphaPattern.setBounds(
borderSize, borderSize, this.getWidth() - borderSize, this.getHeight() - borderSize);
}
@Override
protected void onDraw(Canvas canvas) {
final RectF rect = mColorRect;
if (BORDER_WIDTH_PX > 0) {
mBorderPaint.setColor(mBorderColor);
canvas.drawRect(mDrawingRect, mBorderPaint);
}
if (mAlphaPattern != null) {
mAlphaPattern.draw(canvas);
}
mColorPaint.setColor(mColor);
canvas.drawRect(rect, mColorPaint);
}
private void setUpColorRect() {
final RectF dRect = mDrawingRect;
float left = dRect.left + BORDER_WIDTH_PX;
float top = dRect.top + BORDER_WIDTH_PX;
float bottom = dRect.bottom - BORDER_WIDTH_PX;
float right = dRect.right - BORDER_WIDTH_PX;
mColorRect = new RectF(left, top, right, bottom);
mAlphaPattern = new AlphaPatternDrawable((int) (5 * mDensity));
mAlphaPattern.setBounds(
Math.round(mColorRect.left),
Math.round(mColorRect.top),
Math.round(mColorRect.right),
Math.round(mColorRect.bottom));
}
