/*
* ManipulatorControlSlider.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.studio.client.workbench.views.plots.ui.manipulator;
import org.rstudio.core.client.StringUtil;
import org.rstudio.studio.client.workbench.views.plots.model.Manipulator;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.widgetideas.client.SliderBar;
@SuppressWarnings("deprecation")
public class ManipulatorControlSlider extends ManipulatorControl
implements SliderBar.LabelFormatter
{
public ManipulatorControlSlider(String variable,
double value,
Manipulator.Slider slider,
ManipulatorChangedHandler changedHandler)
{
super(variable, slider, changedHandler);
// get manipulator styles
ManipulatorStyles styles = ManipulatorResources.INSTANCE.manipulatorStyles();
// containing panel
VerticalPanel panel = new VerticalPanel();
// setup caption panel and add it
HorizontalPanel captionPanel = new HorizontalPanel();
Label captionLabel = new Label();
captionLabel.setStyleName(styles.captionLabel());
captionLabel.setText(getLabel() + ":");
captionPanel.add(captionLabel);
final Label valueLabel = new Label();
valueLabel.setStyleName(styles.sliderValueLabel());
captionPanel.add(valueLabel);
panel.add(captionPanel);
// create with range and custom formatter
final double min = slider.getMin();
final double max = slider.getMax();
final double range = max - min;
sliderBar_ = new SliderBar(min, max, this);
// show labels only at the beginning and end
sliderBar_.setNumLabels(1);
// set step size (default to 1 or continuous decimal as appropriate)
double step = slider.getStep();
if (step == -1)
{
// short range or decimals means continous decimal
if (range < 2 || hasDecimals(max) || hasDecimals(min) )
step = range / 250; // ~ one step per pixel
else
step = 1;
}
sliderBar_.setStepSize(step);
// optional tick marks
if (slider.getTicks())
{
double numTicks = range / step;
if (numTicks <= 25) // no more than 25 ticks
sliderBar_.setNumTicks(new Double(numTicks).intValue());
else
sliderBar_.setNumTicks(1);
}
else
{
// always at beginning and end
sliderBar_.setNumTicks(1);
}
// update label on change
sliderBar_.addChangeListener(new ChangeListener() {
@Override
public void onChange(Widget sender)
{
valueLabel.setText(formatLabel(sliderBar_,
sliderBar_.getCurrentValue()));
}
});
sliderBar_.setCurrentValue(value);
// fire changed even on slide completed
sliderBar_.addSlideCompletedListener(new ChangeListener() {
@Override
public void onChange(Widget sender)
{
ManipulatorControlSlider.this.onValueChanged(
new JSONNumber(sliderBar_.getCurrentValue()));
}
});
// add slider bar and fully initialize widget
panel.add(sliderBar_);
initWidget(panel);
addControlStyle(styles.slider());
}
@Override
public void focus()
{
sliderBar_.setFocus(true);
}
@Override
public String formatLabel(SliderBar slider, double value)
{
return StringUtil.prettyFormatNumber(value);
}
private static boolean hasDecimals(double value)
{
double truncatedValue = (double)(Math.round(value));
return value != truncatedValue;
}
private SliderBar sliderBar_ ;
}