screen.cpp

在ARM9和ARMLinux下利用QT编写的实时数据采集

#include "screen.h"

//#include <qpainter.h>
#include <qevent.h>
#include <qrect.h>
#include <qsize.h>
#include <qstring.h>
//#include <qpixmap.h> 
#include <iostream>
using namespace std;
//#include <math.h>
#include <qwmatrix.h> 
#include <qfont.h>
#include <qpen.h>

Screen::Screen(  QWidget *parent, const char *name, WFlags flags )
    : QFrame( parent, name, flags | WNoAutoErase )  //圚qt3.1版本以䞋可以甚WRepaintNoErase | WResizeNoErase来代替WNoAutoErase
{
	setLineWidth( FRAMEWIDTH );	
	setFrameStyle( Panel | Sunken );
	setBackgroundMode( PaletteBase );	//QWidget的凜数讟眮窗䜓的背景颜色。
	setSizePolicy( QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding );
	firstShow = TRUE;
	
}
/*
void Screen::init()
{
	if ( firstShow )
		initNumber();
	initCordinate( drawPainter );
}
*/
/*
void Screen::paintEvent( QPaintEvent * )
{
	if ( firstShow )
		initNumber();
	initCordinate( drawPainter );
}
*/

void Screen::showEvent( QShowEvent *e )
{
	if ( firstShow )
		initNumber();
	initCordinate( drawPainter );
}

QSize Screen::minimumSize () const
{
	return QSize( 20 * 	SPACEMARGIN,  20 * 	SPACEMARGIN );
}

void Screen::hideEvent( QHideEvent *e )
{
	firstShow = FALSE;
}

void Screen::setXTitle(	QString str )
{
	stringXTitle = str;
}
void Screen::setYTitle( QString str )
{
	stringYTitle = str;
}
void Screen::initNumber( )
{
	//firstShow = FALSE;
	saveBuffer.resize( size() );		//set the size and the backcolor of 
	saveBuffer.fill( this, 0, 0 );		//those three QPixmaps as same as the Screen
	newBuffer.resize( size() );
	newBuffer.fill( this, 0, 0 ); 
	midBuffer.resize( size() );
	midBuffer.fill( this, 0, 0 );

	
	drawPainter.begin(&newBuffer);
	/*We translate the device's coordinate system*/
/*	drawPainter.setWindow( 
		-(int)width() / 2, -(int)height() / 2,
		width(), height() ); 
*/
	QRect newWindow = drawPainter.window();

	newY = 0;
	oldY =0; 

	sec = 0;
	min = 0;
	hour = 0;

	numX = 0;
	drawDotLine = FALSE;
	
	//stringYTitle = QObject::tr( "Operation Value" );
	stringXTitle = QObject::tr( "Time (hh:mm:ss)" );
	Yval.push_back( (double)oldY );

	//rectCordinate.setRect( 10 * STEP, 10 * STEP,
			     //width() - 20 * STEP, height() - 40 * STEP ); //星瀺曲线的矩圢框
	rectCordinate.setRect( 
		newWindow.topLeft().x()+FRAMEWIDTH + 2 * BASEFONTHEIGHT + 2 * BASELINELENGHT, 
		newWindow.topLeft().y()+FRAMEWIDTH + 2 * SPACEMARGIN,
		newWindow.width() - 2 * ( FRAMEWIDTH + BASEFONTHEIGHT + BASELINELENGHT + SPACEMARGIN ),
		newWindow.height() - 2 * ( FRAMEWIDTH + BASEFONTHEIGHT + BASELINELENGHT + SPACEMARGIN ) );
	/*comment 2007-8-25*/	
/*	if ( 0 != ( rectCordinate.width() % (STEP*STEP) ) )
	{
		int x = rectCordinate.width() % ( STEP * STEP );	//( (int) sqrt( (float) STEP ) );
		rectCordinate.setWidth( rectCordinate.width() - x+1 );
	}

	if ( 0 != ( rectCordinate.height() % (STEP*STEP) ) )
	{
		int y = rectCordinate.height() % (STEP*STEP);		//( (int) sqrt( (float)STEP ) );
		rectCordinate.setHeight( rectCordinate.height() - y+1 );
	}
	numXTicks = rectCordinate.width() / STEP;
	numYTicks = rectCordinate.height() / STEP;
*/
	if ( 0 != ( rectCordinate.width() % (STEP*STEP) ) )
	{
		int x = rectCordinate.width() % ( STEP * STEP );	//( (int) sqrt( (float) STEP ) );
		rectCordinate.setWidth( rectCordinate.width() - x+1 );
	}

	if ( 0 != ( rectCordinate.height() % (STEP/* *STEP */) ) )
	{
		int y = rectCordinate.height() % (STEP/* *STEP */);		//( (int) sqrt( (float)STEP ) );
		rectCordinate.setHeight( rectCordinate.height() - y+1 );
	}
	numXTicks = rectCordinate.width() / STEP;
	numYTicks = rectCordinate.height() / STEP;
	//fromSaveRect.setRect( rectCordinate.topLeft().x() + STEP, rectCordinate.topLeft().y()+1,
			//rectCordinate.width() - STEP-1, rectCordinate.height()-1+12*STEP );
	//toNewRect.setRect( rectCordinate.topLeft().x()+1, rectCordinate.topLeft().y()+1,
			//rectCordinate.width() - STEP, rectCordinate.height()+12*STEP  );
	rectYText.setRect( 
		newWindow.topLeft().x() + FRAMEWIDTH,
		newWindow.topLeft().y() + FRAMEWIDTH + 2 * SPACEMARGIN,
		BASEFONTHEIGHT, rectCordinate.height() );
//	drawPainter.drawRect(rectYText);
	rectXText.setRect(
		rectCordinate.bottomLeft().x(), 
		newWindow.bottomLeft().y() - FRAMEWIDTH - BASEFONTHEIGHT,
		rectCordinate.width(), BASEFONTHEIGHT );
//		drawPainter.drawRect(rectXText);
	fromSaveRect.setRect( 
		rectCordinate.topLeft().x() + STEP,
		rectCordinate.topLeft().y() + 1,
		rectCordinate.width() - STEP - 1,
		rectCordinate.height() + 2 * BASELINELENGHT + BASEFONTHEIGHT );
//	drawPainter.drawRect(fromSaveRect);
	toNewRect.setRect(
		rectCordinate.topLeft().x() + 1,
		rectCordinate.topLeft().y() + 1,
		rectCordinate.width() - STEP - 1,
		rectCordinate.height() + 2 * BASELINELENGHT + BASEFONTHEIGHT );
//	drawPainter.drawRect(toNewRect);
		
}

void Screen::initCordinate( QPainter &pCordinate )
{
  if ( firstShow )
  {	
//	QPainter pCordinate( &newBuffer );
//	pCordinate.setWindow( -(int)width() / 2; -(int)height() / 2,
						//	width(), height() );
	pCordinate.setPen( Qt::blue );
	pCordinate.drawRect( rectCordinate );
	
	/*draw the Calibration and Calibration values of the y-axis*/
	int y0 = rectCordinate.bottomLeft().y();
	int x0 = rectCordinate.bottomLeft().x();
	int yText = 0;
	int xText= 0;
	for (int j = 0; j <= numYTicks; j ++ )
	{
		pCordinate.drawLine( x0 - BASELINELENGHT, y0, x0, y0 );
		if (0 == j % STEP )
		{
			pCordinate.drawLine( x0 - 2 * BASELINELENGHT, y0, x0 - BASELINELENGHT, y0 );
			pCordinate.save();
			pCordinate.setPen( QPen( blue, 1, DotLine) );
			pCordinate.drawLine( x0 , y0, rectCordinate.bottomRight().x(), y0 );
			pCordinate.restore();
			pCordinate.setPen( Qt::black );

			
			pCordinate.drawText( 
				x0 - 2 * BASELINELENGHT - BASEFONTHEIGHT,
				y0 - 2 * BASEFONTHEIGHT + 3 * STEP,		//5 * STEP, 
				BASEFONTHEIGHT, BASEFONTHEIGHT + STEP, 
				//AlignBottom | Qt::AlignCenter , QString::number( yText) );
				AlignCenter , QString::number( yText) );
			
			yText ++;
			pCordinate.setPen( Qt::blue );
		}
		y0 -= STEP;
	}
	
	/*write the title of y-axis*/
	pCordinate.save();
/*	QRect rectYText( FRAMEWIDTH, rectCordinate.topLeft().y(), 
		rectCordinate.height(), rectCordinate.height() );
	pCordinate.setViewport( rectYText );
	QRect rectXViewport = pCordinate.viewport();
	pCordinate.setWindow( -(int)rectYText.width()/2, -(int)rectYText.height()/2,
							rectYText.width(), rectYText.height() );
	QRect rectXWindow = pCordinate.window();
	QRect rectText( rectXWindow.topLeft().x(),
					-(int)( rectCordinate.topLeft().x() -5 * STEP - FRAMEWIDTH ) / 2,
					rectXWindow.width(), rectCordinate.topLeft().x() -5 * STEP - FRAMEWIDTH );
	pCordinate.rotate(-90.0);
	double dy = ( rectXWindow.width() - rectText.height() ) / 2;
	pCordinate.translate( 0, -dy );
	pCordinate.drawText( rectText.topLeft().x(), rectText.topLeft().y(), 
				rectText.width(), rectText.height(),
				 AlignCenter, "Operation Value" );
 */

/*	QRect tempYText( 
		-(int)rectYText.height() / 2, -(int)rectYText.width() / 2,
		rectYText.height(), rectYText.width() );
	pCordinate.rotate(-90.0);
	double dx = rectYText.topLeft().x() + rectYText.width() / 2;
	double dy = rectYText.topLeft().y() + rectYText.height() / 2;
	dx = dx > 0 ? dx : ( - dx );
	dy = dy > 0 ? dy : ( - dy );

	pCordinate.translate( -dx, -dy );
	pCordinate.drawText( tempYText.topLeft().x(), tempYText.topLeft().y(), 
				tempYText.width(), tempYText.height(),
				 AlignCenter, stringYTitle );
*/
	QRect tempYText( 
		rectYText.topLeft().x(), rectYText.topLeft().y(),
		rectYText.height(), rectYText.height() );
	pCordinate.setViewport( tempYText );
	QRect rectYViewport = pCordinate.viewport();
	pCordinate.setWindow( -(int)rectYViewport.width()/2, -(int)rectYViewport.height()/2,
							rectYViewport.width(), rectYViewport.height() );
	QRect rectYWindow = pCordinate.window();