Converter
Converts metric units and U.S. units (meters / feets etc..)
Description
This example is inspired by Swing tutorial.
Result
main.cpp
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
// http://www.ictp.trieste.it/~manuals/programming/Java/tutorial/uiswing/overview/anatomy.html
#define LAYOUTFILE <Converter/converter.lay>
#include <CtrlCore/lay.h>
struct ConverterPane : WithConverterPaneLayout<StaticRect> {
ConverterPane *slave;
void AdjustSlave()
{
slave->slider <<= slave->value <<=
IsNull(value) ? 0.0 : (double)~unit * (double)~value / (double)~slave->unit;
}
void ValueChanged()
{
slider <<= ~value;
AdjustSlave();
}
void SliderChanged()
{
value <<= ~slider;
AdjustSlave();
}
typedef ConverterPane CLASSNAME;
ConverterPane()
{
CtrlLayout(*this);
slider.Range(10000);
slider <<= value <<= 0;
value <<= THISBACK(ValueChanged);
slider <<= THISBACK(SliderChanged);
unit <<= THISBACK(AdjustSlave);
}
};
struct Converter : TopWindow
{
ConverterPane metric, us;
typedef Converter CLASSNAME;
Converter()
{
Title("Converter");
Size sz = metric.GetLayoutSize();
SetRect(0, 0, metric.GetSize().cx, metric.GetSize().cy * 2);
Add(metric.HSizePos().TopPos(0, sz.cy));
Add(us.HSizePos().BottomPos(0, sz.cy));
metric.title = "Metric units";
metric.unit.Add(0.01, "Centimeters");
metric.unit.Add(1.0, "Meters");
metric.unit.Add(1000.0, "Kilometers");
metric.unit <<= 1.0;
us.title = "U.S. units";
us.unit.Add(0.0254, "Inches");
us.unit.Add(0.305, "Feet");
us.unit.Add(0.914, "Yards");
us.unit.Add(1613.0, "Miles");
us.unit <<= 0.305;
us.slave = &metric;
metric.slave = &us;
metric.AdjustSlave();
}
};
GUI_APP_MAIN
{
Converter().Run();
}
converter.lay
#ifdef LAYOUTFILE
LAYOUT(ConverterPaneLayout, 244, 76)
ITEM(LabelBox, title, LeftPosZ(8, 228).TopPosZ(4, 64))
ITEM(EditDoubleSpin, value, LeftPosZ(16, 144).TopPosZ(20, 19))
ITEM(SliderCtrl, slider, LeftPosZ(16, 144).TopPosZ(40, 20))
ITEM(DropList, unit, LeftPosZ(164, 64).TopPosZ(20, 19))
END_LAYOUT
#endif
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