BoundarySlider Class Reference

#include <BoundarySlider.h>

Inherits Slider.

Public Member Functions
	BoundarySlider ()
	BoundarySlider (QGraphicsItem *parent, unsigned initIdx)
Direction	leftRight (BoundarySlider *otherMarker)
Public Member Functions inherited from Slider
	Slider ()
	Slider (QGraphicsItem *parent, unsigned initIdx)
unsigned	getInitIdx ()
unsigned	getLastIndex ()
void	setLastIndex (unsigned index)
QPointF	boundarySnapPos (QPointF eventPos, qreal clickPosOffsetX, qreal leftBoundary, qreal rightBoundary)
qreal	getClickPosOffsetX (QGraphicsSceneMouseEvent *event)
virtual int	height () const
virtual int	width () const

Protected Member Functions
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)
Protected Member Functions inherited from Slider
void	mousePressEvent (QGraphicsSceneMouseEvent *event)
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)
void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event)

Additional Inherited Members
Signals inherited from Slider
void	sliderMoved (Slider *slider, int idx)
void	sliderClicked (Slider *slider)
void	sliderReleased (Slider *slider, int idx)
Protected Attributes inherited from Slider
unsigned	initIdx
unsigned	lastIndex

Detailed Description

Definition at line 11 of file BoundarySlider.h.

Constructor & Destructor Documentation

BoundarySlider::BoundarySlider

(

)

Definition at line 8 of file BoundarySlider.cc.

                               : Slider() {

}

BoundarySlider::BoundarySlider	(	QGraphicsItem *	parent,
		unsigned	initIdx
	)

Definition at line 12 of file BoundarySlider.cc.

                                                                      : Slider(parent, initIdx) {
    setPixmap(QPixmap(":/timeline/triangle_slider"));
    
    /* Set item coordinate origin to the x_center and let the slider tip overlap the slidebar a little.
     * So the origin is a little above the y_center. */
    setOffset( -0.5 * width() - 1, 0.2 * height() );
}

Member Function Documentation

Direction BoundarySlider::leftRight

(

BoundarySlider *

otherMarker

)

Definition at line 20 of file BoundarySlider.cc.

                                                               {
    if(this->getInitIdx() > otherMarker->getInitIdx()) {
        return RIGHT;
    }
    else {
        return LEFT;
    }
}

void BoundarySlider::mouseMoveEvent ( QGraphicsSceneMouseEvent *  event )

protected

Definition at line 29 of file BoundarySlider.cc.

                                                                   {
    /* Sliding bounds in parent's coords */
    qreal leftBoundary = parentItem()->boundingRect().left();
    qreal rightBoundary = parentItem()->boundingRect().right();

    QPointF newPos = boundarySnapPos(event->pos(), getClickPosOffsetX(event), leftBoundary, rightBoundary);

    // Check for marker overlap with new position
    setPos(newPos);
    if( BoundarySlider *overlappingMarker = ((SlideBarItem*) parentItem())->markerOverlap(this) ) {
        /* Collision detected! Do not move further in this direction! */

        LOG_DEBUG_S << "Overlapping time markers!";

        qreal overlapLeftBoundary;
        qreal overlapRightBoundary;
        switch(leftRight(overlappingMarker)) {
        case LEFT:
            // the overlapping marker is right hand side
            overlapLeftBoundary = leftBoundary;
            overlapRightBoundary = overlappingMarker->pos().x();
            break;
        case RIGHT:
            // the overlapping marker is left hand side
            overlapLeftBoundary = overlappingMarker->pos().x();
            overlapRightBoundary = rightBoundary;
            break;
        default :
            std::cerr << "Unknown direction!" << std::endl;
            exit(EXIT_FAILURE);
        }
        
        /* Update position */
        setPos(boundarySnapPos(event->pos(), getClickPosOffsetX(event), overlapLeftBoundary, overlapRightBoundary));

    } else {
        // No overlap, new position is safe to use.
    }
    unsigned index = ((SlideBarItem*)parentItem())->markerIndex(this);
    setLastIndex(index);
    
//    std::cout << "Logical marker position: " << index << std::endl;
    //std::cout << "Computed real position for that index: " << ((SlideBarItem*)parentItem())->markerPositionForIndex(index) << std::endl;
//    std::cout << "boundary slider pos.x: " << pos().x() << std::endl;
    parentItem()->update(); // updates index slider as well    
}

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The documentation for this class was generated from the following files:

• /build/rock-master-18.09-gui-rock-widget-collection-0.20180124/src/timeline/BoundarySlider.h
• /build/rock-master-18.09-gui-rock-widget-collection-0.20180124/src/timeline/BoundarySlider.cc