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chart/canvasview.cpp Example File

#include "canvasview.h"
#include "chartform.h"

#include <qcursor.h>
#include <qpoint.h>
#include <qpopupmenu.h>
#include <qstatusbar.h>


void CanvasView::contentsContextMenuEvent( QContextMenuEvent * )
{
    ((ChartForm*)parent())->optionsMenu->exec( QCursor::pos() );
}


void CanvasView::viewportResizeEvent( QResizeEvent *e )
{
    canvas()->resize( e->size().width(), e->size().height() );
    ((ChartForm*)parent())->drawElements();
}


void CanvasView::contentsMousePressEvent( QMouseEvent *e )
{
    QCanvasItemList list = canvas()->collisions( e->pos() );
    for ( QCanvasItemList::iterator it = list.begin(); it != list.end(); ++it )
        if ( (*it)->rtti() == CanvasText::CANVAS_TEXT ) {
            m_movingItem = *it;
            m_pos = e->pos();
            return;
        }
    m_movingItem = 0;
}


void CanvasView::contentsMouseMoveEvent( QMouseEvent *e )
{
    if ( m_movingItem ) {
        QPoint offset = e->pos() - m_pos;
        m_movingItem->moveBy( offset.x(), offset.y() );
        m_pos = e->pos();
        ChartForm *form = (ChartForm*)parent();
        form->setChanged( TRUE );
        int chartType = form->chartType();
        CanvasText *item = (CanvasText*)m_movingItem;
        int i = item->index();

        (*m_elements)[i].setProX( chartType, item->x() / canvas()->width() );
        (*m_elements)[i].setProY( chartType, item->y() / canvas()->height() );

        canvas()->update();
    }
}



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Qt 3.3.7