screen.cpp

在ARM9和ARMLinux下利用QT编写的实时数据采集

	QRect rectDrawText( 
		rectYWindow.topLeft().x(),
		-(int)rectYText.width()/2,
		rectYText.height(), 
		rectYText.width() );
	pCordinate.rotate(-90.0);
	double dy = ( rectYWindow.width() - rectDrawText.height() ) / 2;
	dy = dy > 0 ? dy : ( -dy );
	pCordinate.translate( 0, -dy );
	pCordinate.drawText( 
		rectDrawText.topLeft().x(), 
		rectDrawText.topLeft().y(), 
		rectDrawText.width(), 
		rectDrawText.height(),
		AlignCenter, stringYTitle );
	pCordinate.restore();

	/*draw the calibration and calibration values of the x-axis*/
	pCordinate.setPen( Qt::blue );
	y0 = rectCordinate.bottomLeft().y();
	for ( int i = 0; i <= numXTicks; i ++ )
	{
		pCordinate.drawLine( x0 , y0, x0, y0 + BASELINELENGHT );
		if ( 0 == i % (2*STEP) )
		{
			pCordinate.save();
			pCordinate.setPen( QPen( blue, 1, DotLine) );
			pCordinate.drawLine( x0 , rectCordinate.bottomLeft().y(), 
								 x0 , rectCordinate.topLeft().y() );
			pCordinate.restore();
		}

		x0 += STEP;
	}
	
	/*write the title of x-axis*/
/*	QRect rectXText(width()/2+FRAMEWIDTH-10*STEP, toNewRect.bottomLeft().y(),
					20*STEP, 10*STEP);
	pCordinate.drawText(rectXText.topLeft().x(), rectXText.topLeft().y(),
						rectXText.width(), rectXText.height(),
						AlignCenter, QObject::tr("Time (hh:mm:ss)") );
 */
	pCordinate.save();
/*	QRect tempXText(
		-(int)rectXText.width() / 2, -(int)rectXText.height() / 2,
		rectXText.width(), rectXText.height() );
	dx = rectXText.topLeft().x() + rectXText.width() / 2;
	dy = rectXText.topLeft().y() + rectXText.height() / 2;
	dx = dx > 0 ? dx : ( - dx );
	dy = dy > 0 ? dy : ( - dy );
	pCordinate.translate( dx, dy );
	pCordinate.drawText(tempXText.topLeft().x(), tempXText.topLeft().y(),
						tempXText.width(), tempXText.height(),
						AlignCenter, stringXTitle );
*/

	pCordinate.drawText(rectXText.topLeft().x(), rectXText.topLeft().y(),
						rectXText.width(), rectXText.height(),
						AlignCenter, stringXTitle );
	pCordinate.restore();
		
  }
	bitBlt( this, 0, 0, &newBuffer, 0, 0, newBuffer.width(), newBuffer.height() );
	
}



void Screen::animate( double y )
{
	
	newY = y;
	if ( (int) Yval.size() <= (int) width() / 4 )
	{
		Yval.append( newY );
	} else {
		Yval.erase( Yval.begin() );
		Yval.append( newY );
	}
	
	updateCurve( drawPainter);

}

void Screen::updateCurve( QPainter &pDrawCurve)
{
/*	QRect currentWindow = pDrawCurve.window();
	QPainter pSaveBuffer( &saveBuffer );
	QPainter pMidBuffer( &midBuffer );
	pSaveBuffer.setWindow( currentWindow );
	pMidBuffer.setWindow( currentWindow );
	QRect saveBWindow = pSaveBuffer.window();
	QRect midBWindow = pMidBuffer.window();
*/
	copyBlt ( &saveBuffer, 0, 0,&newBuffer, 0, 0, newBuffer.width(), newBuffer.height() );
	copyBlt ( &midBuffer, toNewRect.topLeft().x(), toNewRect.topLeft().y(),
		      &saveBuffer, fromSaveRect.topLeft().x(), fromSaveRect.topLeft().y(), 
			  fromSaveRect.width(), fromSaveRect.height() );
	copyBlt ( &newBuffer, rectCordinate.topLeft().x()+1, rectCordinate.topLeft().y()+1,
			  &midBuffer, rectCordinate.topLeft().x()+1, rectCordinate.topLeft().y()+1, 
	//		  rectCordinate.width()-2, rectCordinate.height()-2+12*STEP );
			  rectCordinate.width()-2, fromSaveRect.height() );
	
/*	copyBlt( 
		&saveBuffer, saveBWindow.topLeft().x(), saveBWindow.topLeft().y(),
		&newBuffer, currentWindow.topLeft().x(), currentWindow.topLeft().y(),
		newBuffer.width(), newBuffer.height() );
	copyBlt( 
		&midBuffer, toNewRect.topLeft().x(), toNewRect.topLeft().y(),
		&saveBuffer, fromSaveRect.topLeft().x(), fromSaveRect.topLeft().y(), 
		fromSaveRect.width(), fromSaveRect.height() );
	copyBlt( 
		&newBuffer, rectCordinate.topLeft().x()+1, rectCordinate.topLeft().y()+1,
		&midBuffer, rectCordinate.topLeft().x()+1, rectCordinate.topLeft().y()+1, 
	//	rectCordinate.width()-2, rectCordinate.height()-2+12*STEP );
		rectCordinate.width()-2, fromSaveRect.height() );
*/
	QValueVector<double>::iterator Yit = Yval.end();
	double Ynew, Yold;
	int Xnew, Xold;
	Ynew = rectCordinate.bottomRight().y() - *(--Yit) - 1;
	Xnew = rectCordinate.bottomRight().x() -1;
	Yold = rectCordinate.bottomRight().y() - *(--Yit) - 1;
	Xold = rectCordinate.bottomRight().x() - STEP;
	
	//QPainter pDrawCurve( &newBuffer );

	
	/*绘制移劚后的暪坐标、刻床和刻床å€*/
	pDrawCurve.setPen( Qt::blue );
	pDrawCurve.drawLine( 
		toNewRect.bottomRight().x(), rectCordinate.bottomRight().y(),
		rectCordinate.bottomRight().x(), rectCordinate.bottomRight().y() );	//draw x-axis
	//static int numX = 0;
	pDrawCurve.drawLine(		//draw the short calibration
		toNewRect.bottomRight().x(), rectCordinate.bottomRight().y(),
		toNewRect.bottomRight().x(), rectCordinate.bottomRight().y() + BASELINELENGHT );
	
	/*draw the dotline in the horizontal direction*/
	int y0 = rectCordinate.bottomRight().y();
//	static bool drawDotLine = FALSE;
	pDrawCurve.save();
	if ( drawDotLine )
	{
		for (int j =0; j < (numYTicks /5 ) /* -1) */; j++)
		{
			y0 -= 5*STEP;
			pDrawCurve.setPen( QPen( blue, 1, DotLine) );
			pDrawCurve.drawLine( toNewRect.bottomRight().x() , y0, 
								 rectCordinate.bottomRight().x(), y0 );
		
		}

	}
	pDrawCurve.restore();
	drawDotLine = !drawDotLine;

	/*draw the calibration values of x-axis*/
	//static int numX = 0;
	if ( 0 == numX % (2*STEP) )
	{
		/*计算暪坐标事件以栌匏hh:mm:ss来衚ç€*/
		int low = hour % 10;
		int high = hour / 10;
		QString timeString;	
		timeString += ( QString( "%1%2:").arg(high).arg(low) );
		low = min % 10;
		high = min / 10;
		timeString += ( QString( "%1%2:").arg(high).arg(low) );
		low = sec % 10;
		high = sec / 10;
		timeString += ( QString( "%1%2").arg(high).arg(low) );		

		/*draw the long calibration */
		pDrawCurve.drawLine( 
			toNewRect.bottomRight().x(), 
			rectCordinate.bottomRight().y() + BASELINELENGHT,
			toNewRect.bottomRight().x(), 
			rectCordinate.bottomRight().y() + 2 * BASELINELENGHT );

		/*draw the dotline in the vertical direction*/
		pDrawCurve.save();
		pDrawCurve.setPen( QPen( blue, 1, DotLine) );
		pDrawCurve.drawLine( 
			toNewRect.bottomRight().x(), 
			rectCordinate.bottomRight().y(), 
			toNewRect.topRight().x(),
			rectCordinate.topRight().y() );
		pDrawCurve.restore();
	
		/*draw the calibration values of x-axis*/
		if ( 0 == numX % (4*STEP) )
		{
			pDrawCurve.drawLine( 
				toNewRect.bottomRight().x(), 
				rectCordinate.bottomRight().y() + 2*BASELINELENGHT,
				toNewRect.bottomRight().x(), 
				rectCordinate.bottomRight().y() + 3 * STEP );
			
			pDrawCurve.setPen( Qt::black );
/*			pDrawCurve.drawText( toNewRect.bottomRight().x() - 10 * STEP , 
								rectCordinate.bottomRight().y() + 3 * STEP, 55, 20,
								AlignRight | Qt::AlignHCenter, timeString );
*/
			QRect rectCValue(
				toNewRect.bottomRight().x() - 9 * STEP,
				toNewRect.bottomRight().y() - BASEFONTHEIGHT+2,
				10 * STEP, 
				BASEFONTHEIGHT);
			pDrawCurve.drawText( 
				rectCValue.topLeft().x(), 
				rectCValue.topLeft().y(), 
				rectCValue.width(), 
				rectCValue.height(),
				AlignRight | Qt::AlignHCenter, 
				timeString );
		}
		sec += 10;
		if ( 60 == sec )
		{
			sec = 0;
			min += 1;
			if ( 60 == min )
			{
				min = 0;
				hour += 1;
				if ( 60 == hour )
					hour = 0;
			}
		}
		

	}
	numX ++;
	if ( numX >= 100 )
		numX = 0;
	

	/*绘制最新采集到的数据曲çº*/
	pDrawCurve.setPen( Qt::black );
	pDrawCurve.drawLine( Xold, (int)Yold, Xnew, (int)Ynew );
	bitBlt( this, 0, 0, &newBuffer, 0, 0, newBuffer.width(), newBuffer.height() );
	
}