void CanvasEnvelopeChanged(object sender, EventArgs e)
{
TileIdentify[] visibleTiles;
LevelDef suitableLevel;
_tilesLocator.Compute(_canvas, out suitableLevel, out visibleTiles);
if (visibleTiles == null || visibleTiles.Length == 0)
{
return;
}
//visibleTiles的顺序需要调整
_tilesLocator.ComputeExtand(_canvas, suitableLevel, out visibleTiles);
_tileCacheManager.WaitLoading(visibleTiles);
_loadStack.Clear();
_tileCacheManager.ClearPastTiles(visibleTiles);
_currentLevel = suitableLevel;
_tilesLocator.GetRasterRowColOfViewWnd(_canvas, out _bRowAtViewWnd, out _bColAtViewWnd, out _widthAtViewWnd, out _heightAtViewWnd);
foreach (TileIdentify tile in visibleTiles)
{
if (!_tileCacheManager.IsExist(tile))
{
_loadStack.Push(tile);
ReStartLoadWorker();
}
}
}
void CanvasEnvelopeChanged(object sender, EventArgs e)
{
TileIdentify[] visibleTiles;
LevelDef suitableLevel;
_tilesLocator.Compute(_canvas, out suitableLevel, out visibleTiles);
if (visibleTiles == null)
{
return;
}
_currentLevel = suitableLevel;
_tilesLocator.GetRasterRowColOfViewWnd(_canvas, out _bRowAtViewWnd, out _bColAtViewWnd, out _widthAtViewWnd, out _heightAtViewWnd);
foreach (TileIdentify tile in visibleTiles)
{
if (!_tileCacheManager.IsExist(tile))
{
_loadStack.Push(tile);
}
}
}