Adjuster.qml Example File
demos/mobile/guitartuner/src/mycomponents/Adjuster.qml
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import QtQuick 1.0
import "adjustbars.js" as AdjustBars
/* A barchart-like adjuster component. */
Rectangle {
id: adjuster
property real max: 100
property real value: 0
property bool created: false
signal valueChanged(real value)
signal focusChangedByClick()
signal arrowPressedWhenValueOverLimits()
function setValue(pValue) {
value = pValue;
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
valueChanged(value);
}
height: 60; width: 300
color: "transparent"
Keys.onRightPressed: {
var val = value+max/AdjustBars.maxBars;
if (val <= max) {
value = val;
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
valueChanged(value);
}
else {
arrowPressedWhenValueOverLimits()
}
}
Keys.onLeftPressed: {
var val = value-max/AdjustBars.maxBars;
if (0 <= val) {
value = val;
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
valueChanged(value);
}
else {
arrowPressedWhenValueOverLimits()
}
}
Component.onCompleted: {
AdjustBars.createBars();
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
created = true;
}
Component.onDestruction: {
AdjustBars.destroyBars;
}
//Dynamic objects have to be recreated when the window size changes.
onWidthChanged: {
if (created) {
AdjustBars.destroyBars();
AdjustBars.createBars();
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
}
}
onHeightChanged: {
if (created) {
AdjustBars.destroyBars();
AdjustBars.createBars();
AdjustBars.fillBars(value/max*AdjustBars.maxBars);
}
}
MouseArea {
anchors.fill: parent
onPositionChanged: {
focusChangedByClick();
var val = mouse.x/parent.width*parent.max;
if (0 < val && val < max) {
parent.value = val;
AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars);
valueChanged(parent.value);
}
}
onClicked: {
focusChangedByClick();
var val = mouse.x/parent.width*parent.max;
if (0 < val && val < max) {
parent.value = val;
AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars);
valueChanged(parent.value);
}
}
}
}