Exemple #1
0
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()