Qt Toolkit - mainlyXt/editor.cpp example file

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# Editor Example

This example shows two simple text editors, with most of the program written in Xt. One editor is a Qt QMultiLineEdit, the other is an Athena Widgets text widget. They are bound together in an Xt form widget.

    #include "qxt.h"
    #include <qmultilinedit.h>
    #include <qpainter.h>
    #include <qmessagebox.h>
    #include <X11/Shell.h>
    #include <X11/StringDefs.h>
    #include <X11/Xaw/Form.h>
    #include <X11/Xaw/AsciiText.h>

    static const char* QTEDMSG =
        "This is a Qt widget.\nIt is a QMultiLineEdit.";

    static const char* XTEDMSG =
        "This is an Xt widget.\nIt is an asciiTextWidgetClass.";

    class EncapsulatedQtWidget : public QXtWidget {
    public:
        QMultiLineEdit* mle;
        EncapsulatedQtWidget(Widget parent) :
            QXtWidget("editor", parent, TRUE)
        {
            mle = new QMultiLineEdit(this);
            mle->setText(QTEDMSG);
        }

        void resizeEvent(QResizeEvent* e )
        {
            QXtWidget::resizeEvent( e );
            mle->resize(width(),height());
        }
    };

    main(int argc, char** argv)
    {
        XtAppContext app;

        Widget toplevel = XtAppInitialize(
            &app, "Editors",
            0, 0, &argc, argv, 0, 0, 0);
        QXtApplication qapp(XtDisplay(toplevel));

        Widget form = XtVaCreateManagedWidget("form", formWidgetClass, toplevel, 0);

        EncapsulatedQtWidget qtchild(form);

        Arg args[20];
        Cardinal nargs=0;
        XtSetArg(args[nargs], XtNwidth, 200);                    nargs++;
        XtSetArg(args[nargs], XtNheight, 200);                   nargs++;
        XtSetValues(qtchild.xtWidget(), args, nargs);
        nargs=0;
        XtSetArg(args[nargs], XtNeditType, XawtextEdit);         nargs++;
        XtSetArg(args[nargs], XtNstring, XTEDMSG);               nargs++;
        XtSetArg(args[nargs], XtNwidth, 200);                    nargs++;
        XtSetArg(args[nargs], XtNheight, 200);                   nargs++;
        XtSetArg(args[nargs], XtNfromHoriz, qtchild.xtWidget()); nargs++;
        Widget xtchild = XtCreateManagedWidget("editor", asciiTextWidgetClass,
            form, args, nargs);

        XtRealizeWidget(toplevel);

    //     XSetInputFocus( qt_xdisplay(), qtchild.mle->winId(), RevertToParent, CurrentTime );

        //XtAppMainLoop(app);

        // or the equivalent:

        XEvent xe;
        while (1)
        {
            XtAppNextEvent(app, &xe);
            XtDispatchEvent(&xe);
        }
    }