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# chart/canvasview.cpp Example File

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

    #include <ntqcursor.h>
    #include <ntqpoint.h>
    #include <ntqpopupmenu.h>
    #include <ntqstatusbar.h>

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

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

    void CanvasView::contentsMousePressEvent( TQMouseEvent *e )
    {
        TQCanvasItemList list = canvas()->collisions( e->pos() );
        for ( TQCanvasItemList::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( TQMouseEvent *e )
    {
        if ( m_movingItem ) {
            TQPoint 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();
        }
    }