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Added shadow layer to emulate FAB behavior. #13

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Added shadow layer to emulate FAB behavior. #13

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3b55d0c
Addeded shadowing.
srdubya Jan 3, 2015
b31cb4d
Fixed indentations back to tabs.
srdubya Jan 3, 2015
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26 changes: 26 additions & 0 deletions library/src/main/java/at/markushi/ui/CircleButton.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@ public class CircleButton extends ImageView {
private static final int PRESSED_COLOR_LIGHTUP = 255 / 25;
private static final int PRESSED_RING_ALPHA = 75;
private static final int DEFAULT_PRESSED_RING_WIDTH_DIP = 4;
private static final int DEFAULT_SHADOW_X_OFFSET_DIP = 1;
private static final int DEFAULT_SHADOW_Y_OFFSET_DIP = 2;
private static final int ANIMATION_TIME_ID = android.R.integer.config_shortAnimTime;

private int centerY;
Expand All @@ -29,6 +31,15 @@ public class CircleButton extends ImageView {

private float animationProgress;

private float density = 3.0f;
private int shadowColor = Color.GRAY;
private int shadowXOffset = (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, DEFAULT_SHADOW_X_OFFSET_DIP,
getResources().getDisplayMetrics());
private int shadowYOffset = (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, DEFAULT_SHADOW_Y_OFFSET_DIP,
getResources().getDisplayMetrics());

private int pressedRingWidth;
private int defaultColor = Color.BLACK;
private int pressedColor;
Expand Down Expand Up @@ -66,6 +77,8 @@ public void setPressed(boolean pressed) {

@Override
protected void onDraw(Canvas canvas) {
circlePaint.setShadowLayer(getShadowRadius(), shadowXOffset, shadowYOffset, shadowColor);

canvas.drawCircle(centerX, centerY, pressedRingRadius + animationProgress, focusPaint);
canvas.drawCircle(centerX, centerY, outerRadius - pressedRingWidth, circlePaint);
super.onDraw(canvas);
Expand Down Expand Up @@ -117,6 +130,7 @@ private void init(Context context, AttributeSet attrs) {

circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
circlePaint.setStyle(Paint.Style.FILL);
setLayerType(LAYER_TYPE_SOFTWARE, circlePaint);

focusPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
focusPaint.setStyle(Paint.Style.STROKE);
Expand All @@ -129,6 +143,9 @@ private void init(Context context, AttributeSet attrs) {
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleButton);
color = a.getColor(R.styleable.CircleButton_cb_color, color);
pressedRingWidth = (int) a.getDimension(R.styleable.CircleButton_cb_pressedRingWidth, pressedRingWidth);
shadowColor = a.getColor(R.styleable.CircleButton_cb_shadowColor, shadowColor);
shadowXOffset = (int) a.getDimension(R.styleable.CircleButton_cb_shadowXOffset, shadowXOffset);
shadowYOffset = (int) a.getDimension(R.styleable.CircleButton_cb_shadowYOffset, shadowYOffset);
a.recycle();
}

Expand All @@ -138,6 +155,15 @@ private void init(Context context, AttributeSet attrs) {
final int pressedAnimationTime = getResources().getInteger(ANIMATION_TIME_ID);
pressedAnimator = ObjectAnimator.ofFloat(this, "animationProgress", 0f, 0f);
pressedAnimator.setDuration(pressedAnimationTime);

density = getResources().getDisplayMetrics().density;
}

private float getShadowRadius() {
if(isPressed()){
return 0.0f;
}
return density * 2.0f;
}

private int getHighlightColor(int color, int amount) {
Expand Down
3 changes: 3 additions & 0 deletions library/src/main/res/values/attrs.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -3,5 +3,8 @@
<declare-styleable name="CircleButton">
<attr name="cb_color" format="color" />
<attr name="cb_pressedRingWidth" format="dimension" />
<attr name="cb_shadowColor" format="color" />
<attr name="cb_shadowXOffset" format="dimension" />
<attr name="cb_shadowYOffset" format="dimension" />
</declare-styleable>
</resources>