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myderivedmap.cpp
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myderivedmap.cpp
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#include "myderivedmap.h"
using namespace std;
myDerivedMap::myDerivedMap(QWidget* parent):cacaMap(parent)
{
cout<<"derived constructor"<<endl;
timer = new QTimer(this);
mindistance = 0.025;
animrate = 0.5;
hlayout = new QHBoxLayout;
slider = new QSlider(Qt::Vertical,this);
slider->setTickPosition(QSlider::TicksBothSides);
slider->setMaximum(maxZoom);
slider->setMinimum(minZoom);
slider->setSliderPosition(zoom);
connect(slider, SIGNAL(valueChanged(int)),this, SLOT(updateZoom(int)));
hlayout->addWidget(slider);
hlayout->addStretch();
setLayout(hlayout);
}
myDerivedMap::~myDerivedMap()
{
delete slider;
delete hlayout;
}
/**
Saves the screen coordinates of the last click
This is used for scrolling the map
@see myDerived::mouseMoveEvent()
*/
void myDerivedMap::mousePressEvent(QMouseEvent* e)
{
mouseAnchor = e->pos();
}
/**
Calculates the length of the mouse drag and
translates it into a new coordinate, map is rerendered
*/
void myDerivedMap::mouseMoveEvent(QMouseEvent* e)
{
QPoint delta = e->pos()- mouseAnchor;
mouseAnchor = e->pos();
longPoint p = myMercator::geoCoordToPixel(geocoords,zoom,tileSize);
p.x-= delta.x();
p.y-= delta.y();
geocoords = myMercator::pixelToGeoCoord(p,zoom,tileSize);
updateContent();
update();
}
void myDerivedMap::mouseDoubleClickEvent(QMouseEvent* e)
{
//do the zoom-in animation magic
if (e->button() == Qt::LeftButton)
{
QPoint deltapx = e->pos() - QPoint(width()/2,height()/2);
longPoint currpospx = myMercator::geoCoordToPixel(geocoords,zoom,tileSize);
longPoint newpospx;
newpospx.x = currpospx.x + deltapx.x();
newpospx.y = currpospx.y + deltapx.y();
destination = myMercator::pixelToGeoCoord(newpospx,zoom,tileSize);
connect(timer,SIGNAL(timeout()),this,SLOT(zoomAnim()));
timer->start(40);
}
//do a simple zoom out for now
else if (e->button() == Qt::RightButton)
{
zoomOut();
slider->setSliderPosition(zoom);
update();
}
}
void myDerivedMap::zoomAnim()
{
float delta = buffzoomrate - 0.5;
if (delta > mindistance)
{
QPointF deltaSpace = destination - geocoords;
geocoords+=animrate*deltaSpace;
buffzoomrate-= delta*animrate;
updateContent();
}
//you are already there
else
{
timer->stop();
disconnect(timer,SIGNAL(timeout()),this,SLOT(zoomAnim()));
geocoords = destination;
buffzoomrate = 1.0;
zoomIn();
slider->setSliderPosition(zoom);
}
update();
}
void myDerivedMap::updateZoom(int newZoom)
{
setZoom(newZoom);
update();
}
void myDerivedMap::paintEvent(QPaintEvent *e)
{
cacaMap::paintEvent(e);
}