/**
* Retrieve the Integer value from the given Attribute of the range element
*
* @param attribute The name of the attribute on the range element
* @return The Integer vaulue read from the given attribute or null
*/
private Integer getIntFromRangeElement(String attribute) {
Element ele = getRangeElement();
if (ele != null) {
return ele.getPropertyInt(attribute);
}
return null;
}
@Override
public void setValue(Double value) {
if (value < min) {
value = min;
} else if (value > max) {
value = max;
}
// Update handle position
final String styleAttribute = isVertical() ? "marginTop" : "marginLeft";
final String domProperty = isVertical() ? "offsetHeight" : "offsetWidth";
final int handleSize = handle.getPropertyInt(domProperty);
final int baseSize = base.getPropertyInt(domProperty) - 2 * BASE_BORDER_WIDTH;
final int range = baseSize - handleSize;
double v = value.doubleValue();
// Round value to resolution
if (resolution > 0) {
v = Math.round(v * Math.pow(10, resolution));
v = v / Math.pow(10, resolution);
} else {
v = Math.round(v);
}
final double valueRange = max - min;
double p = 0;
if (valueRange > 0) {
p = range * ((v - min) / valueRange);
}
if (p < 0) {
p = 0;
}
if (isVertical()) {
p = range - p;
}
final double pos = p;
handle.getStyle().setPropertyPx(styleAttribute, (int) Math.round(pos));
// Update value
this.value = new Double(v);
setFeedbackValue(v);
}
/**
* Returns the offsetWidth element property.
*
* @param elem the element
* @return the offsetWidth property
*/
static final int getOffsetWidth(Element elem) {
return elem.getPropertyInt("offsetWidth");
}
/**
* Returns the offsetHeight element property.
*
* @param elem the element
* @return the offsetHeight property
*/
static final int getOffsetHeight(Element elem) {
return elem.getPropertyInt("offsetHeight");
}
/** For internal use only. May be removed or replaced in the future. */
public void buildBase() {
final String styleAttribute = isVertical() ? "height" : "width";
final String oppositeStyleAttribute = isVertical() ? "width" : "height";
final String domProperty = isVertical() ? "offsetHeight" : "offsetWidth";
// clear unnecessary opposite style attribute
base.getStyle().clearProperty(oppositeStyleAttribute);
/*
* To resolve defect #13681 we should not return from method buildBase()
* if slider has no parentElement, because such operations as
* buildHandle() and setValues(), which are needed for Slider, are
* called at the end of method buildBase(). And these methods will not
* be called if there is no parentElement. So, instead of returning from
* method buildBase() if there is no parentElement "if condition" is
* applied to call code for parentElement only in case it exists.
*/
if (getElement().hasParentElement()) {
final Element p = getElement();
if (p.getPropertyInt(domProperty) > MIN_SIZE) {
if (isVertical()) {
setHeight();
} else {
base.getStyle().clearProperty(styleAttribute);
}
} else {
// Set minimum size and adjust after all components have
// (supposedly) been drawn completely.
base.getStyle().setPropertyPx(styleAttribute, MIN_SIZE);
Scheduler.get()
.scheduleDeferred(
new Command() {
@Override
public void execute() {
final Element p = getElement();
if (p.getPropertyInt(domProperty) > MIN_SIZE + 5
|| propertyNotNullOrEmpty(styleAttribute, p)) {
if (isVertical()) {
setHeight();
} else {
base.getStyle().clearProperty(styleAttribute);
}
// Ensure correct position
setValue(value, false);
}
}
// Style has non empty property
private boolean propertyNotNullOrEmpty(
final String styleAttribute, final Element p) {
return p.getStyle().getProperty(styleAttribute) != null
&& !p.getStyle().getProperty(styleAttribute).isEmpty();
}
});
}
}
if (!isVertical()) {
// Draw handle with a delay to allow base to gain maximum width
Scheduler.get()
.scheduleDeferred(
new Command() {
@Override
public void execute() {
buildHandle();
setValue(value, false);
}
});
} else {
buildHandle();
setValue(value, false);
}
// TODO attach listeners for focusing and arrow keys
}