com.github.ksoichiro.android.observablescrollview

クラス ScrollUtils

java.lang.Object

com.github.ksoichiro.android.observablescrollview.ScrollUtils

public final class ScrollUtils
extends java.lang.Object

Utilities for creating scrolling effects.

メソッドの概要

メソッド

修飾子とタイプ	メソッドと説明
static void	addOnGlobalLayoutListener(android.view.View view, java.lang.Runnable runnable) Add an OnGlobalLayoutListener for the view.
static float[]	cmykFromRgb(int rgbColor) Convert RGB color to CMYK color.
static int	getColorWithAlpha(float alpha, int baseColor) Create a color integer value with specified alpha.
static float	getFloat(float value, float minValue, float maxValue) Return a float value within the range.
static int	mixColors(int fromColor, int toColor, float toAlpha) Mix two colors.
static int	rgbFromCmyk(float[] cmyk) Convert CYMK color to RGB color.

クラスから継承されたメソッド java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

メソッドの詳細

getFloat

public static float getFloat(float value,
             float minValue,
             float maxValue)

Return a float value within the range. This is just a wrapper for Math.min() and Math.max(). This may be useful if you feel it confusing ("Which is min and which is max?").

パラメータ:

value - the target value

minValue - minimum value. If value is less than this, minValue will be returned

maxValue - maximum value. If value is greater than this, maxValue will be returned

戻り値:

float value limited to the range

getColorWithAlpha

public static int getColorWithAlpha(float alpha,
                    int baseColor)

Create a color integer value with specified alpha. This may be useful to change alpha value of background color.

パラメータ:

alpha - alpha value from 0.0f to 1.0f.

baseColor - base color. alpha value will be ignored.

戻り値:

a color with alpha made from base color

addOnGlobalLayoutListener

public static void addOnGlobalLayoutListener(android.view.View view,
                             java.lang.Runnable runnable)

Add an OnGlobalLayoutListener for the view. This is just a convenience method for using ViewTreeObserver.OnGlobalLayoutListener(). This also handles removing listener when onGlobalLayout is called.

パラメータ:

view - the target view to add global layout listener

runnable - runnable to be executed after the view is laid out

mixColors

public static int mixColors(int fromColor,
            int toColor,
            float toAlpha)

Mix two colors. toColor will be toAlpha/1 percent, and fromColor will be (1-toAlpha)/1 percent.

パラメータ:

fromColor - first color to be mixed

toColor - second color to be mixed

toAlpha - alpha value of toColor, 0.0f to 1.0f.

戻り値:

mixed color value in ARGB. Alpha is fixed value (255).

cmykFromRgb

public static float[] cmykFromRgb(int rgbColor)

Convert RGB color to CMYK color.

パラメータ:

rgbColor - target color

戻り値:

CMYK array

rgbFromCmyk

public static int rgbFromCmyk(float[] cmyk)

Convert CYMK color to RGB color. This method doesn't check f cmyk is not null or have 4 elements in array.

パラメータ:

cmyk - target CYMK color. Each value should be between 0.0f to 1.0f, and should be set in this order: cyan, magenta, yellow, black.

戻り値:

ARGB color. Alpha is fixed value (255).