SideBarPreference + Continuing settings

srcs/juloo.common/SlideBarPreference.java

@@ -0,0 +1,127 @@
+package juloo.common;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.SeekBar;
+
+/*
+** SideBarPreference
+** -
+** Open a dialog showing a seekbar
+** -
+** xml attrs:
+**   android:defaultValue		Default value (float)
+**   min						min value (float)
+**   max						max value (float)
+** -
+** Summary field allow to show the current value using %f or %s flag
+*/
+public class SlideBarPreference extends DialogPreference
+	implements SeekBar.OnSeekBarChangeListener
+{
+	private static final int	SEEKBAR_MAX = 1000;
+
+	private LinearLayout	_layout;
+	private TextView		_textView;
+	private SeekBar			_seekBar;
+
+	private float			_min;
+	private float			_max;
+	private float			_value;
+
+	private String			_initialSummary;
+
+	public SlideBarPreference(Context context, AttributeSet attrs)
+	{
+		super(context, attrs);
+		_initialSummary = getSummary().toString();
+		_textView = new TextView(context);
+		_textView.setPadding(48, 40, 48, 40);
+		_seekBar = new SeekBar(context);
+		_seekBar.setOnSeekBarChangeListener(this);
+		_seekBar.setMax(SEEKBAR_MAX);
+		_min = float_of_string(attrs.getAttributeValue(null, "min"));
+		_value = _min;
+		_max = Math.max(1f, float_of_string(attrs.getAttributeValue(null, "max")));
+		_layout = new LinearLayout(getContext());
+		_layout.setOrientation(LinearLayout.VERTICAL);
+		_layout.addView(_textView);
+		_layout.addView(_seekBar);
+	}
+
+	@Override
+	public void				onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
+	{
+		_value = (progress * _max) / SEEKBAR_MAX + _min;
+		updateText();
+	}
+
+	@Override
+	public void				onStartTrackingTouch(SeekBar seekBar)
+	{
+	}
+
+	@Override
+	public void				onStopTrackingTouch(SeekBar seekBar)
+	{
+	}
+
+	@Override
+	protected void			onSetInitialValue(boolean restorePersistedValue, Object defaultValue)
+	{
+		if (restorePersistedValue)
+		{
+			_value = getPersistedFloat(_min);
+		}
+		else
+		{
+			_value = (Float)defaultValue;
+			persistFloat(_value);
+		}
+		_seekBar.setProgress((int)((_value - _min) * SEEKBAR_MAX / _max));
+		updateText();
+	}
+
+	@Override
+	protected Object		onGetDefaultValue(TypedArray a, int index)
+	{
+		return (a.getFloat(index, _min));
+	}
+
+	@Override
+	protected void			onDialogClosed(boolean positiveResult)
+	{
+		if (positiveResult)
+			persistFloat(_value);
+	}
+
+	protected View			onCreateDialogView()
+	{
+		ViewGroup		parent = (ViewGroup)_layout.getParent();
+
+		if (parent != null)
+			parent.removeView(_layout);
+		return (_layout);
+	}
+
+	private void			updateText()
+	{
+		String			f = String.format(_initialSummary, _value);
+
+		_textView.setText(f);
+		setSummary(f);
+	}
+
+	private static float	float_of_string(String str)
+	{
+		if (str == null)
+			return (0f);
+		return (Float.parseFloat(str));
+	}
+}