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# Cursors

This example shows how to set a mouse cursor for a widget.

Implementation:

    /****************************************************************************
    ** $Id: qt/cursor.cpp   3.3.8   edited Jan 11 14:37 $
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <qlabel.h>
    #include <qbitmap.h>
    #include <qapplication.h>
    #include <qlayout.h>
    #include <qcursor.h>

    // cb_bits and cm_bits were generated by X bitmap program.

    #define cb_width  32
    #define cb_height 32

    static unsigned char cb_bits[] = {              // cursor bitmap
       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x0f, 0x00,
       0x00, 0x06, 0x30, 0x00, 0x80, 0x01, 0xc0, 0x00, 0x40, 0x00, 0x00, 0x01,
       0x20, 0x00, 0x00, 0x02, 0x10, 0x00, 0x00, 0x04, 0x08, 0x3e, 0x3e, 0x08,
       0x08, 0x03, 0xe0, 0x08, 0xc4, 0x00, 0x00, 0x11, 0x04, 0x1e, 0x78, 0x10,
       0x02, 0x0c, 0x30, 0x20, 0x02, 0x40, 0x00, 0x20, 0x02, 0x40, 0x00, 0x20,
       0x02, 0x40, 0x00, 0x20, 0x02, 0x20, 0x04, 0x20, 0x02, 0x20, 0x04, 0x20,
       0x02, 0x10, 0x08, 0x20, 0x02, 0x08, 0x08, 0x20, 0x02, 0xf0, 0x07, 0x20,
       0x04, 0x00, 0x00, 0x10, 0x04, 0x00, 0x00, 0x10, 0x08, 0x00, 0xc0, 0x08,
       0x08, 0x3c, 0x30, 0x08, 0x10, 0xe6, 0x19, 0x04, 0x20, 0x00, 0x0f, 0x02,
       0x40, 0x00, 0x00, 0x01, 0x80, 0x01, 0xc0, 0x00, 0x00, 0x06, 0x30, 0x00,
       0x00, 0xf8, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00};

    #define cm_width  32
    #define cm_height 32

    static unsigned char cm_bits[] = {              // cursor bitmap mask
       0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x1f, 0x00, 0x00, 0xfe, 0x3f, 0x00,
       0x80, 0x07, 0xf0, 0x00, 0xc0, 0x01, 0xc0, 0x01, 0x60, 0x00, 0x00, 0x03,
       0x30, 0x00, 0x00, 0x06, 0x18, 0x00, 0x00, 0x0c, 0x0c, 0x3e, 0x3e, 0x18,
       0x0e, 0x03, 0xe0, 0x18, 0xc6, 0x00, 0x00, 0x31, 0x07, 0x1e, 0x78, 0x30,
       0x03, 0x0c, 0x30, 0x60, 0x03, 0x40, 0x00, 0x60, 0x03, 0x40, 0x00, 0x60,
       0x03, 0x40, 0x00, 0x60, 0x03, 0x20, 0x04, 0x60, 0x03, 0x20, 0x04, 0x60,
       0x03, 0x10, 0x08, 0x60, 0x03, 0x08, 0x08, 0x60, 0x03, 0xf0, 0x07, 0x60,
       0x06, 0x00, 0x00, 0x30, 0x06, 0x00, 0x00, 0x30, 0x0c, 0x00, 0xc0, 0x18,
       0x0c, 0x3c, 0x30, 0x18, 0x18, 0xe6, 0x19, 0x0c, 0x30, 0x00, 0x0f, 0x06,
       0x60, 0x00, 0x00, 0x03, 0xc0, 0x01, 0xc0, 0x01, 0x80, 0x07, 0xf0, 0x00,
       0x00, 0xfe, 0x3f, 0x00, 0x00, 0xf8, 0x0f, 0x00};

    //
    // The CursorView contains many labels with different cursors.
    //

    class CursorView : public QWidget               // cursor view
    {
    public:
        CursorView();
    };

    //
    // Constructs a cursor view.
    //

    CursorView::CursorView()                        // construct view
    {
        struct List {
            CursorShape     shape;
            const char*     name;                   // cursor name
        };
        static List list[] = {
            { ArrowCursor,          "arrowCursor" },
            { UpArrowCursor,        "upArrowCursor" },
            { CrossCursor,          "crossCursor" },
            { WaitCursor,           "waitCursor" },
            { IbeamCursor,          "ibeamCursor" },
            { SizeVerCursor,        "sizeVerCursor" },
            { SizeHorCursor,        "sizeHorCursor" },
            { SizeBDiagCursor,      "sizeBDiagCursor" },
            { SizeFDiagCursor,      "sizeFDiagCursor" },
            { SizeAllCursor,        "sizeAllCursor" },
            { BlankCursor,          "blankCursor" },
            { SplitVCursor,         "splitVCursor" },
            { SplitHCursor,         "splitHCursor" },
            { PointingHandCursor,   "pointingHandCursor" },
            { ForbiddenCursor,      "forbiddenCursor" },
            { WhatsThisCursor,      "whatsThisCursor" },
            { BusyCursor,           "busyCursor" }
        };

        setCaption( "CursorView" );                 // set window caption

        QGridLayout* grid = new QGridLayout( this, 5, 4, 20 );
        QLabel *label;

        int i=0;
        for ( int y=0; y<4; y++ ) {                 // create the small labels
            for ( int x=0; x<4; x++ ) {
                label = new QLabel( this );
                label->setCursor( QCursor( list[i].shape ) );
                label->setText( list[i].name );
                label->setAlignment( AlignCenter );
                label->setMargin( 10 );
                label->setFrameStyle( QFrame::Box | QFrame::Raised );
                grid->addWidget( label, x, y );
                i++;
            }
        }

        label = new QLabel( this );
        label->setCursor( QCursor( list[i].shape ) );
        label->setText( list[i].name );
        label->setAlignment( AlignCenter );
        label->setMargin( 10 );
        label->setFrameStyle( QFrame::Box | QFrame::Raised );
        grid->addWidget( label, 4, 0 );

        QBitmap cb( cb_width, cb_height, cb_bits, TRUE );
        QBitmap cm( cm_width, cm_height, cm_bits, TRUE );
        QCursor custom( cb, cm );                   // create bitmap cursor

        label = new QLabel( this );                 // create the big label
        label->setCursor( custom );
        label->setText( "Custom bitmap cursor" );
        label->setAlignment( AlignCenter );
        label->setMargin( 10 );
        label->setFrameStyle( QFrame::Box | QFrame::Sunken );
        grid->addMultiCellWidget( label, 4, 4, 1, 3 );

    }

    //
    // Create and display a CursorView.
    //

    int main( int argc, char **argv )
    {
        QApplication a( argc, argv );               // application object
        CursorView   v;                             // cursor view
        a.setMainWidget( &v );
        v.setCaption("Qt Example - Cursors");
        v.show();
        return a.exec();
    }

See also Examples.