QGrid |
Using the plug-in |
In order to speed up cell redrawing when scrolling up and down the plug-in area, QGrid stores copies of grid cells in a cache in memory. Beside speeding up display, using the cache decreases the number of datafile accesses, which is highly desirable in client/server configurations.
To experience image caching, scroll down a grid that contains several hundreds of cells: the first time you display a new part of the grid you will notice a delay while images are being transferred from the database, combined with captions and background pictures and added to the image cache. If you will scroll up again, the grid will be displayed instantaneously because the cells will be retrieved ready to display from the cache.
Keep in mind the following:
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If you have maximized grids displaying lots of pictures simultaneously, QGrid's image cache will be filled sooner. The larger the viewable grid surface, the shorter the caching effect will last. |