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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > chart/canvasview.cpp Example File< / h1 >
< pre > #include "canvasview.h"
#include "chartform.h"
#include < < a href = "qcursor-h.html" > ntqcursor.h< / a > >
#include < < a href = "qpoint-h.html" > ntqpoint.h< / a > >
#include < < a href = "qpopupmenu-h.html" > ntqpopupmenu.h< / a > >
#include < < a href = "qstatusbar-h.html" > ntqstatusbar.h< / a > >
void CanvasView::< a href = "ntqscrollview.html#contentsContextMenuEvent" > contentsContextMenuEvent< / a > ( < a href = "qcontextmenuevent.html" > TQContextMenuEvent< / a > * )
{
((ChartForm*)< a href = "tqobject.html#parent" > parent< / a > ())-> optionsMenu-> exec( TQCursor::< a href = "ntqcursor.html#pos" > pos< / a > () );
}
void CanvasView::< a href = "ntqscrollview.html#viewportResizeEvent" > viewportResizeEvent< / a > ( < a href = "qresizeevent.html" > TQResizeEvent< / a > *e )
{
< a href = "tqcanvasview.html#canvas" > canvas< / a > ()-> resize( e-> < a href = "qresizeevent.html#size" > size< / a > ().width(), e-> < a href = "qresizeevent.html#size" > size< / a > ().height() );
((ChartForm*)< a href = "tqobject.html#parent" > parent< / a > ())-> drawElements();
}
void CanvasView::< a href = "ntqscrollview.html#contentsMousePressEvent" > contentsMousePressEvent< / a > ( < a href = "qmouseevent.html" > TQMouseEvent< / a > *e )
{
< a href = "tqcanvasitemlist.html" > TQCanvasItemList< / a > list = < a href = "tqcanvasview.html#canvas" > canvas< / a > ()-> collisions( e-> < a href = "qmouseevent.html#pos" > pos< / a > () );
for ( TQCanvasItemList::iterator it = list.< a href = "tqvaluelist.html#begin" > begin< / a > (); it != list.< a href = "tqvaluelist.html#end" > end< / a > (); ++it )
if ( (*it)-> rtti() == CanvasText::CANVAS_TEXT ) {
m_movingItem = *it;
m_pos = e-> < a href = "qmouseevent.html#pos" > pos< / a > ();
return;
}
m_movingItem = 0;
}
void CanvasView::< a href = "ntqscrollview.html#contentsMouseMoveEvent" > contentsMouseMoveEvent< / a > ( < a href = "qmouseevent.html" > TQMouseEvent< / a > *e )
{
if ( m_movingItem ) {
< a href = "ntqpoint.html" > TQPoint< / a > offset = e-> < a href = "qmouseevent.html#pos" > pos< / a > () - m_pos;
m_movingItem-> moveBy( offset.< a href = "ntqpoint.html#x" > x< / a > (), offset.< a href = "ntqpoint.html#y" > y< / a > () );
m_pos = e-> < a href = "qmouseevent.html#pos" > pos< / a > ();
ChartForm *form = (ChartForm*)< a href = "tqobject.html#parent" > parent< / a > ();
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() );
< a href = "tqcanvasview.html#canvas" > canvas< / a > ()-> update();
}
}
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