kicad-developers team mailing list archive

[jean-pierre charras <jean-pierre.charras@...>]

Dick Hollenbeck a écrit :
> Jean-Pierre,
>
> I have the track's bounding box now. How do I scale it to a dirty 
> rectangle?
>
> Here is what I have now:
>
>
> // redraw the area where the track was
> EDA_Rect dirty = Track->GetBoundingBox();
>
> /* saw this going in the opposite direction from what I think I need:
> curpos.x = ScreenPos.x * GetZoom();
> curpos.y = ScreenPos.y * GetZoom();
>
> curpos.x += m_DrawOrg.x;
> curpos.y += m_DrawOrg.y;
> */
>
> // here is the reverse:
> int zoom = GetZoom();
>
> wxPoint drwOrig = GetScreen()->m_DrawOrg;
>
> dirty.m_Pos.x = (dirty.m_Pos.x - drwOrig.x) / zoom;
> dirty.m_Pos.y = (dirty.m_Pos.y - drwOrig.y) / zoom;
>
> dirty.m_Size.x = (dirty.m_Size.x - drwOrig.x) / zoom;
> dirty.m_Size.y = (dirty.m_Size.y - drwOrig.y) / zoom;
>
> // pass wxRect() via EDA_Rect::operator wxRect() overload
> // convert from EDA_Rect to wxRect, no problem here
> wxRect dirtyR = dirty;
>
> DrawPanel->Refresh( TRUE, &dirtyR );
>
>
>
> Does this look right?
For me, it looks right ( but i wrote the graphic code some years ago...)
> > I also believe ReDraw() must be called only once.
>
> Yes, I'm having a look at this too. I put a debug counter in there to 
> learn some interesting things.
>
>
> Dick


--

Jean-Pierre CHARRAS

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