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// Qt# tutorial 7
// Based on the Qt tutorial
// Implemented by Marcus Urban
//
// This example currently does not funtion properly because custom
// signals are not yet implemented.
using System;
using Qt;
[DeclareQtSignal ("valueChanged(int)")]
public class LCDRange : QVBox {
QSlider slider;
public LCDRange (QWidget parent, String name) : base (parent, name)
// In C++, parent and name have default values of 0 (null pointer)
{
QLCDNumber lcd = new QLCDNumber (2, this, "lcd" );
slider = new QSlider (Orientation.Horizontal, this, "slider");
slider.SetRange (0, 99);
slider.SetValue (0);
Connect ( slider, SIGNAL ("valueChanged(int)"), lcd, SLOT ("Display(int)") );
Connect ( slider, SIGNAL ("valueChanged(int)"), SIGNAL ("valueChanged(int)"));
}
public LCDRange (QWidget parent) : this (parent, "") {}
public LCDRange () : this (null, "") {}
// Note that it was necessary to use an empty string ("")
// in the above. Using null does not work at runtime.
public void SetValue (int value)
{
slider.SetValue (value);
}
}
public class MyWidget : QVBox {
MyWidget (QWidget parent, String name) : base (parent, name)
{
QPushButton quit = new QPushButton ("Quit", this, "quit");
quit.SetFont ( new QFont ("Times", 18, QFont.Weight.Bold) );
Connect ( quit, SIGNAL ("clicked()"), qApp, SLOT ("Quit()") );
QGrid grid = new QGrid (4, this);
LCDRange previous = null;
for ( int c =0; c < 4; c++ ) {
for ( int r = 0; r < 4; r++ ) {
LCDRange lr = new LCDRange (grid);
if (previous != null)
Connect (lr, SIGNAL ("valueChanged(int)"),
previous, SLOT ("SetValue(int)") );
previous = lr;
}
}
}
public MyWidget (QWidget parent) : this (parent, "") {}
public MyWidget () : this (null, "") {}
}
public class Example {
public static int Main (String[] args)
{
QApplication a = new QApplication (args);
MyWidget w = new MyWidget ();
a.SetMainWidget (w);
w.Show ();
return a.Exec ();
}
}
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