private void adjustFirstCellsAndScroll() {
int values[];
// values = adjustFirstCellsAndScroll(scrollX, firstColumn, widths);
// scrollX = values[0];
// firstColumn = values[1];
// 切换应用导致重新布局时横向滚到最前端
scrollX = 0;
firstColumn = 0;
sumX = 0;
values = adjustFirstCellsAndScroll(scrollY, firstRow, heights);
scrollY = values[0];
firstRow = values[1];
if (lineView != null) {
int maxY = lineView.getBottom() - height + lineView.getTop();
// data变化后maxY发生变化，而之前存的sumY也失效了，滑动时以现在的maxY为准
if (maxY < 0) {
maxY = 0;
}
sumY = Math.min(maxY, sumY);
lineView.scrollBy(0, sumY);
}
}
@Override
public void scrollBy(int x, int y) {
scrollX += x;
scrollY += y;
if (needRelayout) {
return;
}
if (lineView != null) {
int maxX = lineView.getRight() - width + lineView.getLeft();
int maxY = lineView.getBottom() - height + lineView.getTop();
int dX = x;
int dY = y;
sumX += x;
sumY += y;
if (maxY < 0) {
maxY = 0;
}
if (sumX <= 0) {
dX = x - sumX;
sumX = 0;
} else if (sumX >= maxX) {
dX = maxX - sumX + x;
sumX = maxX;
}
if (sumY <= 0) {
dY = y - sumY;
sumY = 0;
} else if (sumY >= maxY) {
dY = maxY - sumY + y;
sumY = maxY;
}
lineView.scrollBy(dX, 0);
lineView.scrollBy(0, dY);
}
scrollBounds();
/*
* TODO Improve the algorithm. Think big diagonal movements. If we are
* in the top left corner and scrollBy to the opposite corner. We will
* have created the views from the top right corner on the X part and we
* will have eliminated to generate the right at the Y.
*/
if (scrollX == 0) {
// no op
} else if (scrollX > 0) {
while (widths[firstColumn + 1] < scrollX) {
if (!rowViewList.isEmpty()) {
removeLeft();
}
scrollX -= widths[firstColumn + 1];
firstColumn++;
}
while (getFilledWidth() < width) {
addRight();
}
} else {
while (!rowViewList.isEmpty()
&& getFilledWidth() - widths[firstColumn + rowViewList.size()] >= width) {
removeRight();
}
if (rowViewList.isEmpty()) {
while (scrollX < 0) {
firstColumn--;
scrollX += widths[firstColumn + 1];
}
while (getFilledWidth() < width) {
addRight();
}
} else {
while (0 > scrollX) {
addLeft();
firstColumn--;
scrollX += widths[firstColumn + 1];
}
}
}
if (scrollY == 0) {
// no op
} else if (scrollY > 0) {
while (heights[firstRow + 1] < scrollY) {
if (!columnViewList.isEmpty()) {
removeTop();
}
scrollY -= heights[firstRow + 1];
firstRow++;
}
while (getFilledHeight() < height) {
addBottom();
}
} else {
while (!columnViewList.isEmpty()
&& getFilledHeight() - heights[firstRow + columnViewList.size()] >= height) {
removeBottom();
}
if (columnViewList.isEmpty()) {
while (scrollY < 0) {
firstRow--;
scrollY += heights[firstRow + 1];
}
while (getFilledHeight() < height) {
addBottom();
}
} else {
while (0 > scrollY) {
addTop();
firstRow--;
scrollY += heights[firstRow + 1];
}
}
}
repositionViews();
shadowsVisibility();
if (delegateTable != null && positiveScroll) {
delegateTable.setPositiveScroll(false);
delegateTable.scrollBy(x, 0);
}
}
