linking of combox with lineEdit.

**nish** · 28th July 2009, 04:08

you have to pass the parent to lineedit

new QLineEdit(this);

**Devoraz** · 28th July 2009, 04:24

Originally Posted by MrDeath

you have to pass the parent to lineedit

new QLineEdit(this);

eh.. i got this error..

QLineEdit::QLineEdit(QWidget *)' : cannot convert parameter 1 from 'Node *const ' to 'QWidget *'

all the node is drawn using painter. i cant do this.

nameLine = new QLineEdit(painter);

argh.

**nish** · 28th July 2009, 04:28

you have to make the lineEdit the child of the widget you want to show it on..
so pass the parent as the pointer of that widget..
and you havent fully read the tutorial yet.

**Devoraz** · 28th July 2009, 06:05

i really dont know how man. below is the void i wanan add the lineedit into.

the lineedit command is at the end of this void.

Qt Code:

Switch view

void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
	QPixmap pixmap2(200,100);
	pixmap2.fill(Qt::white);
	QPixmap pix;
	QPainter painter1(&pixmap);
	QPainter painter2(&pixmap2);
	QString id;
	Q_UNUSED(option);
 
	QSettings settings;
	nodeAlertTemp = settings.value("NodeAlertTemp", 10).toDouble();
 
	if (nodeData.addr!=0){
		if(nodeData.fadeNumber>5&&nodeData.deletedNode!=0)
		{
			nodeData.fadeNumber-=fade_speed;
			if (nodeData.fadeNumber<=5){
 
				nodeData.fadeNumber=0;
				nodeData.deletedNode=1;
				index_number=0;
			}
		}
 
		if(nodeData.fadeNumber<255&&nodeData.newNode!=0)
		{
			nodeData.fadeNumber+=fade_speed;
			if (nodeData.fadeNumber>=255)
			{	
				nodeData.fadeNumber=255;
				nodeData.newNode=0;
				//current_updateData(index_number);
				index_number=0;
			}
		}
	}
    // Draw the grey shadow for a 3d effect.
    painter->setPen(Qt::NoPen);
    painter->setBrush (QColor(0x80, 0x80, 0x80,(nodeData.fadeNumber)));
    painter->drawEllipse(-45, -45, 100, 100);		
 
    // Set gradient and color of the node
    QRadialGradient gradient(0, 0, 50, -20, -20);// access points
 
    if (nodeData.addr==0&&updated == true) 
    {
        // Mouse click on node or an update of node data~
        gradient.setCenter(3, 3);
        gradient.setFocalPoint(3, 3);
        gradient.setColorAt(1, nodeColor.light(120));
		gradient.setColorAt(.5, nodeColorDark.light(120));
        gradient.setColorAt(0, nodeColorDark.light(120));
        updated = false;
		painter->setBrush(gradient);
    } 
	else if (nodeData.addr==0&&updated == false)
	{
		gradient.setColorAt(0, nodeColor.light(150));
        gradient.setColorAt(1, nodeColorDark);
		painter->setBrush(gradient);
    }		
	// end devices
	if (nodeData.addr!=0&&updated == true) 
	{
		// Mouse click on node or an update of node data~
		gradient.setCenter(3, 3);
		gradient.setFocalPoint(3, 3);
		gradient.setColorAt(1, nodeColor);
		gradient.setColorAt(.5, nodeColor);
		gradient.setColorAt(0, nodeColor);
		updated = false;
		painter->setBrush(gradient);
	} 
	else if (nodeData.addr!=0&&updated == false)
	{
		gradient.setColorAt(0, nodeColor);
		gradient.setColorAt(.95, nodeColorDark);
		gradient.setColorAt(1, nodeColor);
		painter->setBrush(gradient);	
	 }
 
 
	 // painter->setBrush(gradient);
	 // Draw black circle around the node
	 painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
	 // Draw the node
	 painter->drawEllipse(-50, -50, 100, 100);
 
	 //x new text
     // White pen for text
	 if (nodeData.addr==0)
	 {
		 painter->setPen(QPen(Qt::white, 1));
	 }
	 else
	 {
		 if(nodeData.re<100)
		 {
			 painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
		 }
		 else
		 {
			 painter->setPen(QColor(0xff, 0xff, 0xff,(nodeData.fadeNumber)));
		 }
	 }
	 QString qsTemp;
	 QString qsTemp2;
	 // Write RE
	if (nodeData.re>100)
	{
		rebyte=nodeData.re-100;
	}
	else
	{
		rebyte=nodeData.re;
	}
 
	if (rebyte>4&&nodeData.addr>0)
	{
		qsTemp.sprintf("%d Sec", rebyte);//rebyte
		painter->setFont(timeFont);
		painter->drawText(-50,+8,100,20,Qt::AlignCenter , qsTemp,0);
	}
	else if (nodeData.addr>0)
	{
		qsTemp.sprintf("%d Min", rebyte);
		painter->setFont(timeFont);
		painter->drawText(-50,+8,100,20,Qt::AlignCenter , qsTemp,0);
	}
	else if (nodeData.addr==0)
	{
		//qsTemp = timeStamp.toString("hh:mm:ss");
		qsTemp = timeStamp.toString(Qt::LocalDate);
 
		//qsTemp.sprintf("TxCt: %d", cnt_rf);// for Jeff battery test only
		painter->setFont(timeFont);
		painter->drawText(-50,+5,100,20,Qt::AlignCenter , qsTemp,0);
	}
	// Write the battery voltage
	qsTemp.sprintf("%.1fV", nodeData.voltage);
	painter->setFont(battFont);
	painter->drawText(-50,+25,100,20,Qt::AlignCenter , qsTemp,0);
 
	 // Set text in the node
	 // Write the temperature
	if(celsius)
	{
		qsTemp.sprintf("%.1fÂ°C", ((nodeData.temp-32.0)/1.8));
	}
	else 
	{
        qsTemp.sprintf("%.1fÂ°F", nodeData.temp);	
	}
	 if (nodeData.addr==0)					//node 0 
	{
	//xpainter->setFont(tempFont);
		painter->setFont(addrFont);
		painter->drawText(-50,-45,100,40,Qt::AlignCenter , qsTemp,0);
	}
	 else 
	 {
		 painter->setFont(timeFont);
		 painter->drawText(-50,-48,100,40,Qt::AlignCenter , qsTemp,0);
	 }
	if (nodeData.addr==0)					//node 0 
	{
		// Write node number
		//qsTemp.sprintf("Node: %d", nodeData.addr);
		qsTemp.sprintf("Access Point");
		//xpainter->setFont(addrFont);
		painter->setFont(timeFont);
		painter->drawText(-50,-15,100,20,Qt::AlignCenter , qsTemp,0);
	}
	 else
	 {
		// Write node number
		// end device details
 
		qsTemp.sprintf("End Device %d", nodeData.addr);
		//xpainter->setFont(addrFont);
		painter->setFont(timeFont);
		painter->drawText(-50,-22,100,20,Qt::AlignCenter , qsTemp,0);
 
		//Write signal strength in ED node
		if (nodeData.strength > 21)
		{
		qsTemp.sprintf("Strong", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		else if (nodeData.strength > 15)
		{
		qsTemp.sprintf("Medium", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		else 
		{
		qsTemp.sprintf("Weak", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		//temperture alert, 
		if(nodeData.temp > (nodeAlertTemp*9)/5+32.0)
		{	
		painter->setPen(Qt::NoPen);
		painter->setBrush (QColor(0x80, 0x80, 0x80,(nodeData.fadeNumber)));	
		painter->drawEllipse(-45, -45, 100, 100);	
		gradient.setCenter(3, 3);
		gradient.setFocalPoint(3, 3);
		QRadialGradient gradient(0, 0, 50, -20, -20);
		gradient.setColorAt(1, nodeAlertColor);		
		gradient.setColorAt(.5, nodeAlertColorDark);	
		gradient.setColorAt(0, nodeAlertColorDark);
		painter->setBrush(gradient);
		painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
		painter->drawEllipse(-50, -50, 100, 100);
			if(celsius) 
			{
			qsTemp.sprintf("ALERT!\n\ End Device %d\n\ %.1fÂ°C\n\ ", nodeData.addr, ((nodeData.temp-32.0)/1.8));		
			painter->setPen(QPen(Qt::black, 0));			
			painter->setFont(timeFont);
			painter->drawText(-50,-50,100,100,Qt::AlignCenter , qsTemp,0);
			}
			else 
			{
			qsTemp.sprintf("ALERT!\n\ End Device %d\n\ %.1fÂ°F\n\ ", nodeData.addr, nodeData.temp);
			painter->setPen(QPen(Qt::black, 0));			
			painter->setFont(timeFont);
			painter->drawText(-50,-50,100,100,Qt::AlignCenter , qsTemp,0);
			}
		}
		painter->drawRect(-43,-20,85,15);
		[COLOR="blue"]nameLine = new QLineEdit();
		nameLine->setGeometry(QRect(-43,-20,85,15));[/COLOR]	}

void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
	QPixmap pixmap2(200,100);
	pixmap2.fill(Qt::white);
	QPixmap pix;
	QPainter painter1(&pixmap);
	QPainter painter2(&pixmap2);
	QString id;
	Q_UNUSED(option);

	QSettings settings;
	nodeAlertTemp = settings.value("NodeAlertTemp", 10).toDouble();

	if (nodeData.addr!=0){
		if(nodeData.fadeNumber>5&&nodeData.deletedNode!=0)
		{
			nodeData.fadeNumber-=fade_speed;
			if (nodeData.fadeNumber<=5){
			
				nodeData.fadeNumber=0;
				nodeData.deletedNode=1;
				index_number=0;
			}
		}

		if(nodeData.fadeNumber<255&&nodeData.newNode!=0)
		{
			nodeData.fadeNumber+=fade_speed;
			if (nodeData.fadeNumber>=255)
			{	
				nodeData.fadeNumber=255;
				nodeData.newNode=0;
				//current_updateData(index_number);
				index_number=0;
			}
		}
	}
    // Draw the grey shadow for a 3d effect.
    painter->setPen(Qt::NoPen);
    painter->setBrush (QColor(0x80, 0x80, 0x80,(nodeData.fadeNumber)));
    painter->drawEllipse(-45, -45, 100, 100);		

    // Set gradient and color of the node
    QRadialGradient gradient(0, 0, 50, -20, -20);// access points

    if (nodeData.addr==0&&updated == true) 
    {
        // Mouse click on node or an update of node data~
        gradient.setCenter(3, 3);
        gradient.setFocalPoint(3, 3);
        gradient.setColorAt(1, nodeColor.light(120));
		gradient.setColorAt(.5, nodeColorDark.light(120));
        gradient.setColorAt(0, nodeColorDark.light(120));
        updated = false;
		painter->setBrush(gradient);
    } 
	else if (nodeData.addr==0&&updated == false)
	{
		gradient.setColorAt(0, nodeColor.light(150));
        gradient.setColorAt(1, nodeColorDark);
		painter->setBrush(gradient);
    }		
	// end devices
	if (nodeData.addr!=0&&updated == true) 
	{
		// Mouse click on node or an update of node data~
		gradient.setCenter(3, 3);
		gradient.setFocalPoint(3, 3);
		gradient.setColorAt(1, nodeColor);
		gradient.setColorAt(.5, nodeColor);
		gradient.setColorAt(0, nodeColor);
		updated = false;
		painter->setBrush(gradient);
	} 
	else if (nodeData.addr!=0&&updated == false)
	{
		gradient.setColorAt(0, nodeColor);
		gradient.setColorAt(.95, nodeColorDark);
		gradient.setColorAt(1, nodeColor);
		painter->setBrush(gradient);	
	 }

	 
	 // painter->setBrush(gradient);
	 // Draw black circle around the node
	 painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
	 // Draw the node
	 painter->drawEllipse(-50, -50, 100, 100);
	 
	 //x new text
     // White pen for text
	 if (nodeData.addr==0)
	 {
		 painter->setPen(QPen(Qt::white, 1));
	 }
	 else
	 {
		 if(nodeData.re<100)
		 {
			 painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
		 }
		 else
		 {
			 painter->setPen(QColor(0xff, 0xff, 0xff,(nodeData.fadeNumber)));
		 }
	 }
	 QString qsTemp;
	 QString qsTemp2;
	 // Write RE
	if (nodeData.re>100)
	{
		rebyte=nodeData.re-100;
	}
	else
	{
		rebyte=nodeData.re;
	}

	if (rebyte>4&&nodeData.addr>0)
	{
		qsTemp.sprintf("%d Sec", rebyte);//rebyte
		painter->setFont(timeFont);
		painter->drawText(-50,+8,100,20,Qt::AlignCenter , qsTemp,0);
	}
	else if (nodeData.addr>0)
	{
		qsTemp.sprintf("%d Min", rebyte);
		painter->setFont(timeFont);
		painter->drawText(-50,+8,100,20,Qt::AlignCenter , qsTemp,0);
	}
	else if (nodeData.addr==0)
	{
		//qsTemp = timeStamp.toString("hh:mm:ss");
		qsTemp = timeStamp.toString(Qt::LocalDate);
		
		//qsTemp.sprintf("TxCt: %d", cnt_rf);// for Jeff battery test only
		painter->setFont(timeFont);
		painter->drawText(-50,+5,100,20,Qt::AlignCenter , qsTemp,0);
	}
	// Write the battery voltage
	qsTemp.sprintf("%.1fV", nodeData.voltage);
	painter->setFont(battFont);
	painter->drawText(-50,+25,100,20,Qt::AlignCenter , qsTemp,0);
	 
	 // Set text in the node
	 // Write the temperature
	if(celsius)
	{
		qsTemp.sprintf("%.1fÂ°C", ((nodeData.temp-32.0)/1.8));
	}
	else 
	{
        qsTemp.sprintf("%.1fÂ°F", nodeData.temp);	
	}
	 if (nodeData.addr==0)					//node 0 
	{
	//xpainter->setFont(tempFont);
		painter->setFont(addrFont);
		painter->drawText(-50,-45,100,40,Qt::AlignCenter , qsTemp,0);
	}
	 else 
	 {
		 painter->setFont(timeFont);
		 painter->drawText(-50,-48,100,40,Qt::AlignCenter , qsTemp,0);
	 }
	if (nodeData.addr==0)					//node 0 
	{
		// Write node number
		//qsTemp.sprintf("Node: %d", nodeData.addr);
		qsTemp.sprintf("Access Point");
		//xpainter->setFont(addrFont);
		painter->setFont(timeFont);
		painter->drawText(-50,-15,100,20,Qt::AlignCenter , qsTemp,0);
	}
	 else
	 {
		// Write node number
		// end device details

		qsTemp.sprintf("End Device %d", nodeData.addr);
		//xpainter->setFont(addrFont);
		painter->setFont(timeFont);
		painter->drawText(-50,-22,100,20,Qt::AlignCenter , qsTemp,0);
		
		//Write signal strength in ED node
		if (nodeData.strength > 21)
		{
		qsTemp.sprintf("Strong", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		else if (nodeData.strength > 15)
		{
		qsTemp.sprintf("Medium", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		else 
		{
		qsTemp.sprintf("Weak", nodeData.strength);
		painter->setFont(strengthFont);
		painter->drawText(-50,-8,100,20,Qt::AlignCenter , qsTemp,0);
		}
		//temperture alert, 
		if(nodeData.temp > (nodeAlertTemp*9)/5+32.0)
		{	
		painter->setPen(Qt::NoPen);
		painter->setBrush (QColor(0x80, 0x80, 0x80,(nodeData.fadeNumber)));	
		painter->drawEllipse(-45, -45, 100, 100);	
		gradient.setCenter(3, 3);
		gradient.setFocalPoint(3, 3);
		QRadialGradient gradient(0, 0, 50, -20, -20);
		gradient.setColorAt(1, nodeAlertColor);		
		gradient.setColorAt(.5, nodeAlertColorDark);	
		gradient.setColorAt(0, nodeAlertColorDark);
		painter->setBrush(gradient);
		painter->setPen(QColor(0, 0, 0,(nodeData.fadeNumber)));
		painter->drawEllipse(-50, -50, 100, 100);
			if(celsius) 
			{
			qsTemp.sprintf("ALERT!\n\ End Device %d\n\ %.1fÂ°C\n\ ", nodeData.addr, ((nodeData.temp-32.0)/1.8));		
			painter->setPen(QPen(Qt::black, 0));			
			painter->setFont(timeFont);
			painter->drawText(-50,-50,100,100,Qt::AlignCenter , qsTemp,0);
			}
			else 
			{
			qsTemp.sprintf("ALERT!\n\ End Device %d\n\ %.1fÂ°F\n\ ", nodeData.addr, nodeData.temp);
			painter->setPen(QPen(Qt::black, 0));			
			painter->setFont(timeFont);
			painter->drawText(-50,-50,100,100,Qt::AlignCenter , qsTemp,0);
			}
		}
		painter->drawRect(-43,-20,85,15);
		[COLOR="blue"]nameLine = new QLineEdit();
		nameLine->setGeometry(QRect(-43,-20,85,15));[/COLOR]	}

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**nish** · 28th July 2009, 06:17

so your are creating a lineEdit inside the paint method which would be called thousands of time per second... so every time you will be creating the lineEdit and creating a memory leak. The line edit should be created once in the main widget on which the painter is painting and use the pointer to the line edit in paint()

**Devoraz** · 28th July 2009, 06:23

OMG!! argh..

i guess the main widget on which the painter pain on is here. so i write the command of the line edit here?

Qt Code:

Switch view

QRectF Node::boundingRect() const
{
    qreal adjust = 2;
    return QRectF(-50 - adjust, -50 - adjust,
                  110 + adjust, 110 + adjust);
}

QRectF Node::boundingRect() const
{
    qreal adjust = 2;
    return QRectF(-50 - adjust, -50 - adjust,
                  110 + adjust, 110 + adjust);
}

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**Devoraz** · 29th July 2009, 01:56

hello~ Mr.Death~~~

**nish** · 29th July 2009, 03:15

hello there...

make the line edit in constructor of you widget being painted.

**Devoraz** · 29th July 2009, 05:59

Originally Posted by MrDeath

hello there...

make the line edit in constructor of you widget being painted.

sorry, but i dun get what you mean by in construtor of my widget

**nish** · 29th July 2009, 06:04

you have a widget subclass on which you use the QPainter rite?
make lineedit a member of your qwidget subclass and new it in the constructor of that subclass.

take a look at the example programs that comes with Qt please please....

**Devoraz** · 29th July 2009, 06:19

Originally Posted by MrDeath

take a look at the example programs that comes with Qt please please....

argh argh argh. why i dun seem to understand. lol. which example? do i look into?

**nish** · 29th July 2009, 06:29

widget painting example..

Thread: linking of combox with lineEdit.

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