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Various bug fixes in the grid, implemented prefetching, workaround for performance issues regarding update, removed _lastModification

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This commit is contained in:
Andreas Stöckel
2012-03-26 15:28:02 +00:00
parent 5e9a768fb1
commit 34a43e8869
8 changed files with 200 additions and 134 deletions
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30
etemplate/js/et2_dataview_view_grid.js
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@ -135,6 +135,22 @@ var et2_dataview_grid = et2_dataview_container.extend(et2_dataview_IViewRange, {
this.setTotalCount(oldTotalCount);
},
/**
* Throws all elements away which are outside the current view range
*/
cleanup: function () {
// Update the pixel positions
this._recalculateElementPosition();
// Get the visible mapping indices and recalculate index and pixel
// position of the containers.
var mapVis = this._calculateVisibleMappingIndices();
// Delete all invisible elements -- if anything changed, we have to
// recalculate the pixel positions again
this._cleanupOutOfRangeElements(mapVis, 0);
},
/**
* The insertRow function can be called to insert the given container(s) at
* the given row index. If there currently is another container at that
@ -560,22 +576,24 @@ var et2_dataview_grid = et2_dataview_container.extend(et2_dataview_IViewRange, {
/**
* Deletes all elements which are "out of the view range". This function is
* internally used by "_doInvalidate". How many elements that are out of the
* view range get preserved fully depends on the ET2_GRID_HOLD_COUNT
* view range get preserved fully depends on the _holdCount parameter
* variable.
*
* @param _mapVis contains the _map indices of the just visible containers.
* @param _holdCount contains the number of elements that should be kept,
* if not given, this parameter defaults to ET2_GRID_HOLD_COUNT
*/
_cleanupOutOfRangeElements: function(_mapVis) {
_cleanupOutOfRangeElements: function(_mapVis, _holdCount) {
// Iterates over the map from and to the given indices and pushes all
// elements onto the given array, which are more than ET2_GRID_HOLD_COUNT
// elements onto the given array, which are more than _holdCount
// elements remote from the start.
function searchElements(_arr, _start, _stop, _dir)
{
var dist = 0;
for (var i = _start; _dir > 0 ? i <= _stop : i >= _stop; i += _dir)
{
if (dist > ET2_GRID_HOLD_COUNT)
if (dist > _holdCount)
{
_arr.push(i);
}
@ -586,6 +604,10 @@ var et2_dataview_grid = et2_dataview_container.extend(et2_dataview_IViewRange, {
}
}
// Set _holdCount to ET2_GRID_HOLD_COUNT if the parameters is not given
_holdCount = typeof _holdCount === "undefined" ? ET2_GRID_HOLD_COUNT :
_holdCount;
// Collect all elements that will be deleted at the top and at the
// bottom of the grid
var deleteTop = [];