// Qt# tutorial 5 // Based on the Qt tutorial // Implemented by Marcus Urban using System; using Qt; public class MyWidget : TQVBox { public MyWidget (TQWidget parent, String name) : base (parent, name) // In C++, parent and name have default values of 0 (null pointer) { TQPushButton quit = new TQPushButton ("Quit", this, "quit"); quit.SetFont ( new TQFont ("Times", 18, TQFont.Weight.Bold) ); TQObject.Connect ( quit, TQT_SIGNAL ("clicked()"), tqApp, TQT_SLOT ("Quit()") ); TQLCDNumber lcd = new TQLCDNumber (2, this, "lcd" ); TQSlider slider = new TQSlider (Orientation.Horizontal, this, "slider"); // Note that Orientation is defined in the Qt class slider.SetRange (0, 99); slider.SetValue (0); Connect ( slider, TQT_SIGNAL ("valueChanged(int)"), lcd, TQT_SLOT ("Display(int)") ); } public MyWidget (TQWidget parent) : this (parent, "") {} public MyWidget () : this (null, "") {} // Note that it was necessary to use an empty string ("") // in the above. Using null does not work at runtime. } public class Example { public static int Main (String[] args) { TQApplication a = new TQApplication (args); MyWidget w = new MyWidget (); a.SetMainWidget (w); w.Show (); return a.Exec (); } }