public void actionPerformed(ActionEvent e) {
JGrid grid = (JGrid) e.getSource();
if (toLimit) {
if (vertically) {
int rowCount = grid.getRowCount();
this.dx = 0;
this.dy = forwards ? rowCount : -rowCount;
} else {
int colCount = grid.getColumnCount();
this.dx = forwards ? colCount : -colCount;
this.dy = 0;
}
} else {
if (!(grid.getParent().getParent() instanceof JScrollPane)) {
return;
}
Dimension delta = grid.getParent().getSize();
SelectionModel sm = grid.getSelectionModel();
int start = 0;
if (vertically) {
start = (extend) ? sm.getLeadRow() : sm.getAnchorRow();
} else {
start = (extend) ? sm.getLeadColumn() : sm.getAnchorColumn();
}
if (vertically) {
Rectangle r = grid.getCellBounds(start, 0);
r.y += forwards ? delta.height : -delta.height;
this.dx = 0;
int newRow = grid.rowAtPoint(r.getLocation());
if (newRow == -1 && forwards) {
newRow = grid.getRowCount();
}
this.dy = newRow - start;
} else {
Rectangle r = grid.getCellBounds(0, start);
r.x += forwards ? delta.width : -delta.width;
int newColumn = grid.columnAtPoint(r.getLocation());
if (newColumn == -1 && forwards) {
newColumn = grid.getColumnCount();
}
this.dx = newColumn - start;
this.dy = 0;
}
}
super.actionPerformed(e);
}
public void paint(Graphics g, JComponent c) {
if (grid.getRowCount() <= 0 || grid.getColumnCount() <= 0) {
return; // nothing to paint
}
Rectangle clip = g.getClipBounds();
Point minLocation = clip.getLocation();
Point maxLocation = new Point(clip.x + clip.width - 1, clip.y + clip.height - 1);
int rowMin = grid.rowAtPoint(minLocation);
int rowMax = grid.rowAtPoint(maxLocation);
// This should never happen.
if (rowMin == -1) {
rowMin = 0;
}
// If the spread does not have enough rows to fill the view we'll get -1.
// Replace this with the index of the last row.
if (rowMax == -1) {
rowMax = grid.getRowCount() - 1;
}
int colMin = grid.columnAtPoint(minLocation);
int colMax = grid.columnAtPoint(maxLocation);
// This should never happen.
if (colMin == -1) {
colMin = 0;
}
// If the spread does not have enough columns to fill the view we'll get -1.
// Replace this with the index of the last column.
if (colMax == -1) {
colMax = grid.getColumnCount() - 1;
}
// Paint cells
paintCells(g, rowMin, rowMax, colMin, colMax);
// Paint grid
paintGrid(g, rowMin, rowMax, colMin, colMax);
// Paint spans
paintSpans(g, rowMin, rowMax, colMin, colMax);
// Paint borders
paintBorders(g, rowMin, rowMax, colMin, colMax);
// Paint editor
paintEditor(g);
}
