Source canvas PFD PointerElement.nas
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# PFD UI Element - Pointer UI Element. Displays value by moving the element on a horizontal or vertical scale.
var PointerElement =
{
new : func (pagename, svg, name, minVal, maxVal, scalePx, vertical=0, value=0, style=nil)
{
var obj = {
parents : [ PointerElement, PFD.UIElement ],
_name : pagename ~ name,
_edit : 0,
_min : minVal,
_max : maxVal,
_scale : scalePx,
_vertical : vertical,
_style : style,
};
if (style == nil) obj._style = PFD.DefaultStyle;
obj._symbol = svg.getElementById(obj._name);
assert(obj._symbol != nil, "Unable to find element " ~ obj._name);
obj._baseTranslation = obj._symbol.getTranslation();
obj.setValue(value);
# State and timer for flashing highlighting of elements
# We need a separate Enabled flag as the timers are in a separate thread.
obj._highlightEnabled = 0;
obj._highlighted = 0;
obj._flashTimer = nil;
return obj;
},
getName : func() { return me._name; },
getValue : func() { return me._value; },
setValue : func(value) {
if (value == nil) value = 0.0;
# Bound value to the minimum and maximum values.
value = math.max(me._min, value);
value = math.min(me._max, value);
# Convert to normalized value
value = (value - me._min) / (me._max - me._min);
# Simply shift the slider along.
if (me._vertical) {
# Vertical
me._symbol.setTranslation([
me._baseTranslation[0],
me._baseTranslation[1] + (value * me._scale)
]);
} else {
# Horizontal
me._symbol.setTranslation([
me._baseTranslation[0] + (value * me._scale),
me._baseTranslation[1]
]);
}
},
setVisible : func(vis) { me._symbol.setVisible(vis); },
_flashElement : func() {
if (me._highlightEnabled == 0) {
me._symbol.setVisible(0);
me._highlighted = 0;
} else {
if (me._highlighted == 0) {
me._symbol.setVisible(1);
me._highlighted = 1;
} else {
me._symbol.setVisible(0);
me._highlighted = 0;
}
}
},
highlightElement : func() {
me._highlightEnabled = 1;
me._highlighted = 0;
me._flashElement();
me._flashTimer = maketimer(me._style.CURSOR_BLINK_PERIOD, me, me._flashElement);
me._flashTimer.start();
},
unhighlightElement : func() {
if (me._flashTimer != nil) me._flashTimer.stop();
me._flashTimer = nil;
me._highlightEnabled = 0;
me._highlighted = 0;
me._flashElement();
},
isEditable : func () { return 0; },
isInEdit : func() { return 0; },
enterElement : func() { return me.getValue(); },
clearElement : func() { },
editElement : func() { },
incrSmall : func(value) { },
incrLarge : func(value) { },
};