WinCE操作系统下分层显示的设计与实现

Design and Implementation of Layer Display in WinCE

当测量仪器的某个界面同时含有迹线刷新和静态文本或位图时,随着迹线、静态文本的刷新或者位图的切换,可能会出现静态文本、位图或迹线覆盖的问题,同时由于频繁的切换,还可能出现刷新比较缓慢的情况。在WinCE下分层显示的方法,把变化很少或一直不变的显示元素和频繁变化的显示元素分别置于不同的显示层中。当界面更新时,只需要刷新发生变化的显示层,然后合并没有变化的显示层然后显示到一起界面上,这样就解决了界面刷新过程中,可能出现的迹线、位图或静态文本被覆盖的问题和刷新速度较慢的问题。详细介绍了界面中各个显示层的创建、释放等操作。简化了复杂的显示,实现界面的准确而快速的刷新。

When there are refurbishment of track ,static text and bitmap in Electronic Measuring Equipments, track ,static, text and bitmap may be covered as a result of refurbishment of track ,static text and swlth of bitmep and refresh slowly oct account of swith frequently.So the separating layer designing is applied in WinCE.the elements that do not always change or chang infrequently and the elements that frequently changes are extracted to different layer. When the interface need to be updated,the layer with often change elements is refreshed only and then mergering the Other layers to the real screen.The problem that the track, static text or bitmap may be covered and refresh slowly in the process of animation refreshing is resolved. The details how to create, release the layer are discussed in the paper. The precise display of achieved, when refresh dynamically and the precise operations of control are realized.