Widget to display the maps of various spacial aspects of the model. More...

#include <MapBox.h>

Inheritance diagram for MapBox:

Collaboration diagram for MapBox:

Public Slots
void	updatePixel (QString layerName_h, int x_h, int y_h, QColor color_h)

void	updateImage (QString layerName_h, const QImage &image_h)

void	switchToLayer (QString layerName_h)
	Change the layer that currentLayer and currentLayerName points. More...

void	addLayer (QString layerName_h)

void	fitInWindow ()

void	zoom (double zoomFactor)

void	scroll (int deltaX, int deltaY)

Signals
void	queryRequestOnPx (int px_ID, int currentLayerIndex, bool newRequest)

Public Member Functions
	MapBox (QWidget *parent=0)

int	getLayerIndex (QString layerName_h="")
	Return the index of the specified layer (null to ask for the current one) More...

Private Member Functions
void	updatePixmap (const QImage &image, bool reFit=false)

void	paintEvent (QPaintEvent *event)
	Reimplementation of the standard paintEvent method. More...

void	prepareQueryEvent (QPoint click)

void	keyPressEvent (QKeyEvent *event)

void	wheelEvent (QWheelEvent *event)

void	mousePressEvent (QMouseEvent *event)

void	mouseMoveEvent (QMouseEvent *event)

Private Attributes
vector< QImage >	layersVector
	Vector of QImages. More...

vector< QString >	layersNameVector
	Vector of layer names. More...

QImage	currentLayer

QString	currentLayerName

QPoint	lastDragPos

double	sx1

double	sy1

double	sx2

double	sy2
	coordinates of corner pixels of source - pixmap - rectangle More...

double	dx1

double	dy1

double	dx2

double	dy2
	coordinates of corner pixels of destination - widget - rectangle More...

Detailed Description

Widget to display the maps of various spacial aspects of the model.

This class is based on QImage. It pick-ups from layersVector the choosed layer and display it.
It has methods to change the individual pixels or the whole image of a layer.

Definition at line 41 of file MapBox.h.

Constructor & Destructor Documentation

MapBox ( QWidget * parent = 0 )

Definition at line 35 of file MapBox.cpp.

                              :QWidget(parent) {
 
   currentLayerName = "";
   setCursor(Qt::CrossCursor);
 
   // setting source and destination init corners..
   sx1 = 0;
   sy1 = 0;
   sx2 = this->width();
   sy2 = this->height();
   dx1 = 0;
   dy1 = 0;
   dx2 = this->width();
   dy2 = this->height();
 }

Member Function Documentation

void addLayer ( QString layerName_h )

slot

Definition at line 135 of file MapBox.cpp.

                                    {
   static int counter = 0;
   QImage newlayer = QImage(this->width(), this->height(), QImage::Format_RGB32);
   newlayer.fill(qRgb(255, 255, 255));
   layersVector.push_back(newlayer);
   layersNameVector.push_back(layerName_h);
   if (counter == 0) {
     currentLayerName = layerName_h;
     currentLayer = layersVector.at(0);
   }
   counter ++;
 }

void fitInWindow ( )

slot

Definition at line 217 of file MapBox.cpp.

Referenced by updateImage().

                         {
 
   QPixmap pixmap = QPixmap::fromImage(currentLayer);
   double tempXScale = ( (double) this->width()) / ((double)pixmap.width());
   double tempYScale = ( (double) this->height())/ ((double)pixmap.height());
 
   sx1 = 0;
   sy1 = 0;
   sx2 = pixmap.width();
   sy2 = pixmap.height();
   dx1 = 0;
   dy1 = 0;
 
   if ( tempXScale >= tempYScale){
     dx2 = ((double)pixmap.width())*tempYScale;
     dy2 = this->height();
   } else {
     dx2 = this->width();
     dy2 = ((double)pixmap.height())*tempXScale;
   }
   update();
 }

Here is the caller graph for this function:

int getLayerIndex ( QString layerName_h = "" )

Return the index of the specified layer (null to ask for the current one)

Definition at line 123 of file MapBox.cpp.

Referenced by prepareQueryEvent().

                                         {
   if( layerName_h == "") layerName_h = currentLayerName;
   for (uint i=0;i<layersVector.size();i++){
     if (layersNameVector.at(i) == layerName_h){
       return i;
     }
   }
   cout << "*** ERROR in MapBox:getLayerIndex(): layerName_h "<< qPrintable(layerName_h) << " not found "<< endl;
   return -1;
 }

Here is the caller graph for this function:

void keyPressEvent ( QKeyEvent * event )

private

Definition at line 149 of file MapBox.cpp.

                                       {
   switch (event->key()) {
     case Qt::Key_Plus:
     zoom(ZoomInFactor);
     break;
   case Qt::Key_Minus:
     zoom(ZoomOutFactor);
     break;
   case Qt::Key_Left:
     scroll(+ScrollStep, 0);
     break;
   case Qt::Key_Right:
     scroll(-ScrollStep, 0);
     break;
   case Qt::Key_Down:
     scroll(0, -ScrollStep);
     break;
   case Qt::Key_Up:
     scroll(0, +ScrollStep);
     break;
   default:
     QWidget::keyPressEvent(event);
   }
 }

Here is the call graph for this function:

void mouseMoveEvent ( QMouseEvent * event )

private

Definition at line 209 of file MapBox.cpp.

                                          {
   if (event->buttons() & Qt::LeftButton) {
     scroll(event->pos().x()-lastDragPos.x(), event->pos().y()-lastDragPos.y());
     lastDragPos = event->pos();
     update();
   }
 }

Here is the call graph for this function:

void mousePressEvent ( QMouseEvent * event )

private

Definition at line 182 of file MapBox.cpp.

                                          {
   if (event->button() == Qt::LeftButton){
     lastDragPos = event->pos();
   }
   else if (event->button() == Qt::RightButton){
     prepareQueryEvent(event->pos());
   }
 }

Here is the call graph for this function:

void paintEvent ( QPaintEvent * event )

private

Reimplementation of the standard paintEvent method.

We paint the image pixel by pixel picking up the colors from the map pointed by currentLayer.

Definition at line 55 of file MapBox.cpp.

                                      {
 
   if (layersVector.size() < 1) return;
   QPainter painter(this);
   painter.fillRect(rect(), Qt::lightGray  );
   QPixmap pixmap = QPixmap::fromImage(currentLayer); // It doesn't get autmoatically refreshed if I use a separate function to update the pixmap from the image
   QRectF source     (sx1, sy1, sx2-sx1, sy2-sy1); // the second point is in coordinates origin of the firt point !!!!
   QRectF destination(dx1, dy1, dx2-dx1, dy2-dy1); // the second point is in coordinates origin of the firt point !!!!
   /*
   This is the main function of the widget... the good pointa are:
   A) It takes into account the low level details of scaling, such interpolation
   B) If the destination is outside the widgets bounds, it doesn't matter. It make its job on the widget without any error (in this sence it isnot like an array luckily...)
   */
   painter.drawPixmap(destination, pixmap, source);
 
 }

void prepareQueryEvent ( QPoint click )

private

Definition at line 192 of file MapBox.cpp.

Referenced by mousePressEvent().

                                      {
   double cx = ((double) click.x()); //clicked x, casted to double
   double cy = ((double) click.y()); //clicked y, casted to double
   int   mx, my = 0; // outputed x and y
   int   px_ID;  // pixel ID
   int   layerIndex = getLayerIndex();
   // checking it is not out of the destination border range..
   if (cx>dx2 || cx<dx1 || cy>dy2 || cy<dy1) return;
   mx = ( (int) (cx-dx1) * (sx2-sx1)/(dx2-dx1) + sx1); // casting to int, not round() !!
   my = ( (int) (cy-dy1) * (sy2-sy1)/(dy2-dy1) + sy1); // casting to int, not round() !!
   px_ID = mx+my*(sx2-sx1);
   emit queryRequestOnPx(px_ID, layerIndex, true);
 
 }

Here is the call graph for this function:

Here is the caller graph for this function:

void queryRequestOnPx	(	int	px_ID,
		int	currentLayerIndex,
		bool	newRequest
	)

signal

Referenced by prepareQueryEvent().

Here is the caller graph for this function:

void scroll	(	int	deltaX,
		int	deltaY
	)

slot

Definition at line 255 of file MapBox.cpp.

Referenced by keyPressEvent(), and mouseMoveEvent().

                                     {
   dx1 += ((double) deltaX);
   dx2 += ((double) deltaX);
   dy1 += ((double) deltaY);
   dy2 += ((double) deltaY);
   update();
 }

Here is the caller graph for this function:

void switchToLayer ( QString layerName_h )

slot

Change the layer that currentLayer and currentLayerName points.

Definition at line 108 of file MapBox.cpp.

                                         {
   if (layerName_h != currentLayerName){
     for (uint i=0;i<layersVector.size();i++){
       if (layersNameVector.at(i) == layerName_h){
         currentLayer = layersVector.at(i);
         currentLayerName = layerName_h;
         update();
         return;
       }
     }
     cout << "*** ERROR in MapBox::switchToLayer(): layerName_h "<< qPrintable(layerName_h) << " not found "<< endl;
   }
 }

void updateImage	(	QString	layerName_h,
		const QImage &	image_h
	)

slot

Definition at line 87 of file MapBox.cpp.

                                                              {
   static int counter = 0;
   for (uint i=0;i<layersVector.size();i++){
     if (layersNameVector.at(i) == layerName_h){
       layersVector.at(i) = image_h;
       if(layerName_h == currentLayerName){
         currentLayer = layersVector.at(i);
         update();
       }
       if (counter == 0) { // that's the first image we got !!
         fitInWindow();
       }
       counter ++;
       return;
     }
   }
   counter ++;
   cout << "*** ERROR in MapBox::updateImage(): layerName_h "<< qPrintable(layerName_h) << " not found "<< endl;
 }

Here is the call graph for this function:

void updatePixel	(	QString	layerName_h,
		int	x_h,
		int	y_h,
		QColor	color_h
	)

slot

Definition at line 73 of file MapBox.cpp.

                                                                         {
   for (uint i=0;i<layersVector.size();i++){
     if (layersNameVector.at(i) == layerName_h){
       layersVector.at(i).setPixel(x_h, y_h, color_h.rgb());
       if(layerName_h == currentLayerName){
         currentLayer = layersVector.at(i);
         update();
       }
       return;
     }
   }
 }

void updatePixmap	(	const QImage &	image,
		bool	reFit = `false`
	)

private

void wheelEvent ( QWheelEvent * event )

private

Definition at line 175 of file MapBox.cpp.

                                     {
   int numDegrees = event->delta() / 8;
   double numSteps = numDegrees / 15.0f;
   zoom(pow(ZoomInFactor, numSteps));
 }

Here is the call graph for this function:

void zoom ( double zoomFactor )

slot

Definition at line 241 of file MapBox.cpp.

Referenced by keyPressEvent(), and wheelEvent().

                              {
   double dx1new, dx2new, dy1new, dy2new;
   dx1new = dx2- (dx2-dx1)* ( 1+ (zoomFactor-1)/2 ); 
   dx2new = dx1+ (dx2-dx1)* ( 1+ (zoomFactor-1)/2 );
   dy1new = dy2- (dy2-dy1)* ( 1+ (zoomFactor-1)/2 ); 
   dy2new = dy1+ (dy2-dy1)* ( 1+ (zoomFactor-1)/2 );
   dx1 = dx1new;
   dy1 = dy1new;
   dx2 = dx2new;
   dy2 = dy2new;
   update();
 }