C++ QwtPlotCanvas::setCursor方法代码示例

CanvasPicker::CanvasPicker( QwtPlot *plot ):
    QObject( plot ),
    d_selectedCurve( NULL ),
    d_selectedPoint( -1 )
{
    QwtPlotCanvas *canvas = qobject_cast<QwtPlotCanvas *>( plot->canvas() );
    canvas->installEventFilter( this );

    // We want the focus, but no focus rect. The
    // selected point will be highlighted instead.

    canvas->setFocusPolicy( Qt::StrongFocus );
#ifndef QT_NO_CURSOR
    canvas->setCursor( Qt::PointingHandCursor );
#endif
    canvas->setFocusIndicator( QwtPlotCanvas::ItemFocusIndicator );
    canvas->setFocus();

    const char *text =
        "All points can be moved using the left mouse button "
        "or with these keys:\n\n"
        "- Up:\t\tSelect next curve\n"
        "- Down:\t\tSelect previous curve\n"
        "- Left, ´-´:\tSelect next point\n"
        "- Right, ´+´:\tSelect previous point\n"
        "- 7, 8, 9, 4, 6, 1, 2, 3:\tMove selected point";
    canvas->setWhatsThis( text );

    shiftCurveCursor( true );
}

    CanvasPicker::CanvasPicker(Plot *plot):
        QObject(plot),
        d_selectedCurve(NULL),
        d_selectedPoint(-1)
    {
        qDebug() << __FILE__ << __FUNCTION__;

        QwtPlotCanvas *canvas = (QwtPlotCanvas*) plot->canvas();

        canvas->installEventFilter(this);

        // We want the focus, but no focus rect. The
        // selected point will be highlighted instead.

        canvas->setFocusPolicy(Qt::StrongFocus);
    #ifndef QT_NO_CURSOR
        canvas->setCursor(Qt::PointingHandCursor);
    #endif
        canvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
        canvas->setFocus();

        mousePressed = false;

        accelerate = 0;

    }

PlotZoz::PlotZoz(QWidget *)
{
    // Прозрачность полотна
    QwtPlotCanvas *canvas = new QwtPlotCanvas();
    canvas->setFrameStyle(QFrame::NoFrame);
    canvas->setPaintAttribute(QwtPlotCanvas::BackingStore, false);
    canvas->setPaintAttribute(QwtPlotCanvas::Opaque, false);
    canvas->setAttribute(Qt::WA_OpaquePaintEvent, false);
    canvas->setAutoFillBackground( false );
    setCanvas(canvas);
    plotLayout()->setAlignCanvasToScales(true);

    // Отключаем щкалы деления
    for (int i=0; i<QwtPlot::axisCnt; i++) {
        axisScaleDraw(i)->enableComponent(QwtScaleDraw::Ticks, false);
        axisScaleDraw(i)->enableComponent(QwtScaleDraw::Backbone, false);
    }

    pltSpectrogram = new PlotSpectr();
    pltRasterData = new PlotRasterData();

    pltGrid = new QwtPlotGrid;
    pltGrid->enableXMin(true);       // разрешаем отображение линий сетки, соответствующих вспомогательным делениям нижней шкалы
    pltGrid->enableYMin(true);       // разрешаем отображение линий сетки, соответствующих вспомогательным делениям нижней шкалы
    pltGrid->setMajorPen(QPen(Qt::gray,0,Qt::DotLine));  // черный для основных делений
    pltGrid->setMinorPen(QPen(Qt::gray,0,Qt::DotLine));  // серый для вспомогательных
    pltGrid->attach(this);

    setAxisMaxMajor(0,20);
    setAxisMaxMinor(0,0);
    setAxisMaxMajor(1,20);
    setAxisMaxMinor(1,0);
    setAxisMaxMajor(2,20);
    setAxisMaxMinor(2,0);
    setAxisMaxMajor(3,20);
    setAxisMaxMinor(3,0);

    canvas->setCursor(Qt::ArrowCursor);
    setMouseTracking(true);
    for (int i=0; i<QwtPlot::axisCnt; i++)
        axisWidget(i)->setMouseTracking(true);
}

Plot::Plot(QWidget *parent, const char *name)
		: QwtPlot(parent)
{
marker_key = 0;
curve_key = 0;

minTickLength = 5;
majTickLength = 9;

movedGraph=FALSE;
graphToResize=FALSE;
ShiftButton=FALSE;

setGeometry(QRect(0,0,500,400));
setAxisTitle(QwtPlot::yLeft, tr("Y Axis Title"));
setAxisTitle(QwtPlot::xBottom, tr("X Axis Title"));	

// grid 
d_grid = new Grid;
d_grid->enableX(false);
d_grid->enableY(false);
d_grid->setMajPen(QPen(Qt::blue, 0, Qt::SolidLine));
d_grid->setMinPen(QPen(Qt::gray, 0 , Qt::DotLine));
d_grid->attach(this);

//custom scale
for (int i= 0; i<QwtPlot::axisCnt; i++)
	{
	QwtScaleWidget *scale = (QwtScaleWidget *) axisWidget(i);
	if (scale)
		{
		scale->setMargin(0);

		//the axis title color must be initialized
		QwtText title = scale->title();
		title.setColor(Qt::black);
		scale->setTitle(title);

		ScaleDraw *sd = new ScaleDraw();
		sd->setTickLength  	(QwtScaleDiv::MinorTick, minTickLength); 
		sd->setTickLength  	(QwtScaleDiv::MediumTick, minTickLength);
		sd->setTickLength  	(QwtScaleDiv::MajorTick, majTickLength);

		setAxisScaleDraw (i, sd);
		}
	}
	
QwtPlotLayout *pLayout=plotLayout();
pLayout->setCanvasMargin(0);

QwtPlotCanvas* plCanvas = canvas();
plCanvas->setFocusPolicy(QWidget::StrongFocus);
plCanvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
plCanvas->setFocus();
plCanvas->setFrameShadow(QwtPlot::Plain);
plCanvas->setCursor(Qt::arrowCursor);
plCanvas->setLineWidth(0);

setFocusPolicy(QWidget::StrongFocus);
setFocusProxy(plCanvas);
setFrameShape (QFrame::Box);
setLineWidth(0);
}

Plot::Plot(int width, int height, QWidget *parent, const char *)
: QwtPlot(parent)
{
	setAutoReplot (false);

	marker_key = 0;
	curve_key = 0;

	minTickLength = 5;
	majTickLength = 9;

	setGeometry(QRect(0, 0, width, height));
	setAxisTitle(QwtPlot::yLeft, tr("Y Axis Title"));
	setAxisTitle(QwtPlot::xBottom, tr("X Axis Title"));
	//due to the plot layout updates, we must always have a non empty title
	setAxisTitle(QwtPlot::yRight, tr(" "));
	setAxisTitle(QwtPlot::xTop, tr(" "));

	// grid
	d_grid = new Grid();
	d_grid->attach(this);

	//custom scale
	for (int i= 0; i<QwtPlot::axisCnt; i++) {
		QwtScaleWidget *scale = (QwtScaleWidget *) axisWidget(i);
		if (scale) {
			scale->setMargin(0);

			//the axis title color must be initialized...
			QwtText title = scale->title();
			title.setColor(Qt::black);
			scale->setTitle(title);

            //...same for axis color
            QPalette pal = scale->palette();
            pal.setColor(QPalette::Foreground, QColor(Qt::black));
            scale->setPalette(pal);

			ScaleDraw *sd = new ScaleDraw(this);
			sd->setTickLength(QwtScaleDiv::MinorTick, minTickLength);
			sd->setTickLength(QwtScaleDiv::MediumTick, minTickLength);
			sd->setTickLength(QwtScaleDiv::MajorTick, majTickLength);

			setAxisScaleDraw (i, sd);
			setAxisScaleEngine (i, new ScaleEngine());
		}
	}

	QwtPlotLayout *pLayout = plotLayout();
	pLayout->setCanvasMargin(0);
	pLayout->setAlignCanvasToScales (true);

	QwtPlotCanvas* plCanvas = canvas();
	plCanvas->setFocusPolicy(Qt::StrongFocus);
	plCanvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
	//plCanvas->setFocus();
	plCanvas->setFrameShadow(QwtPlot::Plain);
	plCanvas->setCursor(Qt::arrowCursor);
	plCanvas->setLineWidth(0);
	plCanvas->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
	plCanvas->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);

    QColor background = QColor(Qt::white);
    background.setAlpha(255);

	QPalette palette;
    palette.setColor(QPalette::Window, background);
    setPalette(palette);

	setCanvasBackground (background);
	setFocusPolicy(Qt::StrongFocus);
	//setFocusProxy(plCanvas);
	setFrameShape(QFrame::Box);
	setLineWidth(0);
}