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// import QtQuick 1.0 // to target S60 5th Edition or Maemo 5
import QtQuick 2.0
// The FGauge allows to transform an input value range into an output value rang using a smooth transition
// it can be e.g. used to transfrom the speed of a vehicle into an angle of the pointer needle
// The borders of the input and output ranges are mapped to each other and a linear transformation is executed
Item {
id: theGauge
// the time required to move through the full range from e.g. min to max
property int fullSweepTime: 1000
// minimum border, the input value can reach
property double minInput: 0.0
// maximum value, the input can reach
property double maxInput: 100.0
// the current input value. Each change will trigger an animated change of the output
property double currentInput: 50.0
// minimum border, the output value can reach
property double minOutput: 0.0
// maximum value, the output can reach
property double maxOutput: 100.0
//
property double currentOutput: 50.0
// this is the targetted output. Changing this, will trigger the animation to be executed
property double targetOutput
// this is the time required to move to the target value
property int targetTime
PropertyAnimation { id: anim; target: theGauge; properties: "currentOutput"; to: theGauge.targetOutput; duration: theGauge.targetTime }
onCurrentInputChanged: {
// we need to calculate the target and the required time to reach it
var target = (currentInput - minInput) * (maxOutput - minOutput) / (maxInput - minInput) + minOutput;
if(target < minOutput) {
target = minOutput;
}
else if (target > maxOutput) {
target = maxOutput;
}
targetTime = Math.abs((target - currentOutput) / (maxOutput - minOutput)) * fullSweepTime;
if(targetTime > 0) {
targetOutput = target;
anim.restart();
}
}
}
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