void ScaleBar::pointerButtonDown(GLMotif::Event& event)
{
Scalar newScale=currentScale;
/* Check if the event happened in the left or right corner: */
float relEventPos=(event.getWidgetPoint().getPoint()[0]-getInterior().origin[0])/getInterior().size[0];
if(relEventPos<=0.333f)
{
/* Calculate the next smaller quasi-binary scale factor: */
newScale=Scalar(getSmallerQuasiBinary(currentScale));
}
else if(relEventPos>=0.667f)
{
/* Calculate the next bigger quasi-binary scale factor: */
newScale=Scalar(getBiggerQuasiBinary(currentScale));
}
if(newScale!=currentScale&&activateNavigationTool(reinterpret_cast<const Tool*>(this)))
{
/* Adjust the navigation transformation: */
Scalar newNavScale;
const Geometry::LinearUnit& unit=getCoordinateManager()->getUnit();
if(unit.isImperial())
{
/* Calculate scale factor through imperial units: */
newNavScale=getInchFactor()*newScale/unit.getInchFactor();
}
else
{
/* Calculate scale factor through metric units: */
newNavScale=getMeterFactor()*newScale/unit.getMeterFactor();
}
/* Get the current navigation transformation and calculate the display center position in navigation coordinates: */
const NavTransform& nav=getNavigationTransformation();
Point center=nav.inverseTransform(getDisplayCenter());
/* Create the new navigation transformation: */
NavTransform newNav=NavTransform(nav.getTranslation(),nav.getRotation(),newNavScale);
newNav.leftMultiply(NavTransform::translate(getDisplayCenter()-newNav.transform(center)));
setNavigationTransformation(newNav);
deactivateNavigationTool(reinterpret_cast<const Tool*>(this));
currentScale=newScale;
/* Update the scale bar: */
calcSize(newNav);
/* Resize the widget so that the clicked point stays in the same place: */
GLMotif::Vector newSize=calcNaturalSize();
GLfloat newInteriorWidth=newSize[0]-2.0f*getBorderWidth();
GLfloat newOrigin=event.getWidgetPoint().getPoint()[0]-newInteriorWidth*relEventPos-getBorderWidth();
resize(GLMotif::Box(GLMotif::Vector(newOrigin,0.0f,0.0f),newSize));
}
}
/*
* pointerButtonDown - Pointer button down event handler. A virtual function of GLMotif::Widget base.
*
* parameter event - GLMotif::Event&
*/
void SliceWidget::pointerButtonDown(GLMotif::Event& event) {
selected = true;
double _x = event.getWidgetPoint().getPoint()[0];
double _y = event.getWidgetPoint().getPoint()[1];
} // end pointerButtonDown()
/*
* findRecipient - Determine which is the applicable widget of the event. A virtual function of GLMotif::Widget base.
*
* parameter event - GLMotif::Event&
* return - bool
*/
bool SliceWidget::findRecipient(GLMotif::Event& event) {
if (selected) {
return event.setTargetWidget(this, event.calcWidgetPoint(this));
} else
return GLMotif::Widget::findRecipient(event);
} // end findRecipient()