@Override
public void setDisabled(boolean isDisable) {
if (isDisable) {
handle.getElement().setTabIndex(-1);
} else {
handle.getElement().setTabIndex(getTabIndex());
}
super.setDisabled(isDisable);
}
@Override
public void setTabIndex(int tabIndex) {
this.tabIndex = tabIndex;
if (!isDisabled()) handle.getElement().setTabIndex(tabIndex);
}
@Override
public void onMouseDown(Event event) {
event.preventDefault();
if (isDisabled()) {
return;
}
handle.enable(event);
}
private void positionKnob() {
double p = 1.0 - (getMaxValue() - getValue()) / (getMaxValue() - getMinValue());
if (range != null) {
if (isVertical()) {
double y = Math.round((1.0 - p) * (getOffsetHeight() - 20.0));
handle.setPosition(y + 10.0);
double rangeValue = getOffsetHeight() - (y + 10.0);
range.getStyle().setHeight(rangeValue, Style.Unit.PX);
} else {
double x = Math.round(p * (getOffsetWidth() - 20.0));
handle.setPosition(x + 10.0);
range.getStyle().setWidth(x + 10.0, Style.Unit.PX);
}
}
}
private void calcValue(Event event) {
Point mouseDownOffset = handle.getMouseDownOffset();
double offsetx = event.getClientX() - getElement().getAbsoluteLeft() - mouseDownOffset.x,
offsety = event.getClientY() - getElement().getAbsoluteTop() - mouseDownOffset.y;
double dv;
if (isVertical()) {
dv = valueOfKnobPosition(offsety);
} else {
dv = valueOfKnobPosition(offsetx);
}
setValue(dv);
}