Mercurial > MadButterfly
view dox/arch.h @ 656:38c720272dd5
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author | Thinker K.F. Li <thinker@branda.to> |
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date | Sat, 31 Jul 2010 14:11:01 +0800 |
parents | e89512d6fa0a |
children |
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/*! \page archi Internal Architecture * * \image html core.png * Above graphic is relationship among major objects of MadButterfly. * \ref redraw_man_t, redraw manager, is supposed to manage graphic elements, * shapes, and decide when and who to redraw on the output screen. * * \ref shape_t is base-type for all graphic objects. It can be a path, * a text, a ellipse, ..., or an image. When the states or attributes of * an graphic * object changed, managing redraw_man_t, the one that manages the graphic * object, will be notified. The redraw_man_t will schedule a redrawing * for every * dirty objects, changed ones, and relative objects. The relative objects * are objects effected by changed ones. For example, part of a relative * object may be hidden before changing, but it is re-explored after chaning. * The explored part of the object must be redrawed. * * The shape of shape objects are vary from type to type. To simplize * the problem, we use a rectangle to model the area occupied by an object. * \ref geo_t is the one used to model the rectangle. Shape objects should * update associated \ref geo_t objects to reflect changing of them-self. * * \ref coord_t is used to model transformation in coordinate system. * A \ref coord_t is actually an transform matrix with additional * informations. \ref coord_t * objects are organized as a tree according hierachy of group tags in * a SVG file. coord_t has a member variable, called before_pmem, that * is relative position in parent coord. \ref coord_t::before_pmem stands for * "before parent member", it is an index to the list of member shapes * of parent coord. Members of a coord is shape tags they are children of * the "g" tag of the coord corresponding. \ref coord_t::before_pmem means * "g" of the coord is before the indexed member of parent. * * \image html geom_relation.png * * It is possible to have more than one coord with the same * \ref coord_t::before_pmem value and as children of a coord. It means * all children with the same coord_t::before_pmem value are all before * nth member, after (n-1)th member, and they are in order of them-self * in the children list. * * Colors or patterns used to stroke or fill shapes are described * by \ref paint_t . Every shape object has a paint, but a paint object * can be used by multiple shape objects. Once a paint is changed, all * objects that associate with the paint are dirty. They will be scheduled * by associated \ref redraw_man_t object to update graphics on * output screen. * */