private void moveWithinGridRange(JGrid grid, int dx, int dy, boolean changeLead) {
if (changeLead) {
leadRow = clipToRange(leadRow + dy, 0, grid.getRowCount());
leadColumn = clipToRange(leadColumn + dx, 0, grid.getColumnCount());
} else {
anchorRow = clipToRange(anchorRow + dy, 0, grid.getRowCount());
anchorColumn = clipToRange(anchorColumn + dx, 0, grid.getColumnCount());
}
}
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);
}
private boolean moveWithinSelectedRange(JGrid grid, int dx, int dy, boolean ignoreCarry) {
SelectionModel sm = grid.getSelectionModel();
int newAnchorRow = anchorRow + dy;
int newAnchorColumn = anchorColumn + dx;
int rowSgn;
int colSgn;
int rowCount = selectionSpan(sm, SwingConstants.VERTICAL);
int columnCount = selectionSpan(sm, SwingConstants.HORIZONTAL);
boolean canStayInSelection = (rowCount * columnCount > 1);
if (canStayInSelection) {
rowSgn = compare(newAnchorRow, sm, SwingConstants.VERTICAL);
colSgn = compare(newAnchorColumn, sm, SwingConstants.HORIZONTAL);
} else {
// If there is only one selected cell, there is no point
// in trying to stay within the selected area. Move outside
// the selection, wrapping at the table boundaries.
rowCount = grid.getRowCount();
columnCount = grid.getColumnCount();
rowSgn = compare(newAnchorRow, 0, rowCount);
colSgn = compare(newAnchorColumn, 0, columnCount);
}
anchorRow = newAnchorRow - rowCount * rowSgn;
anchorColumn = newAnchorColumn - columnCount * colSgn;
if (!ignoreCarry) {
return moveWithinSelectedRange(grid, rowSgn, colSgn, true);
}
return canStayInSelection;
}
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);
}
public Dimension getMaximumSize(JComponent c) {
int lastRow = grid.getRowCount() - 1;
int lastCol = grid.getColumnCount() - 1;
Rectangle cellBounds = grid.getCellBounds(lastRow, lastCol);
int width = cellBounds.x + cellBounds.width;
int height = cellBounds.y + cellBounds.height;
return new Dimension(width, height);
}
/*
* Borders are handled by the UI since they are shared between cells
* and therefore must overlay after the painting of the cells
*/
private void paintBorders(Graphics g, int rowMin, int rowMax, int colMin, int colMax) {
// Include borders from adjacent rows/columns of the clip region
rowMin = Math.max(0, rowMin - 1);
rowMax = Math.min(grid.getRowCount() - 1, rowMax + 1);
colMin = Math.max(0, colMin - 1);
colMax = Math.min(grid.getColumnCount() - 1, colMax + 1);
for (int row = rowMin; row <= rowMax; row++) {
for (int column = colMin; column <= colMax; column++) {
Rectangle cellRect = grid.getCellBounds(row, column);
paintBorder(g, cellRect, row, column);
}
}
}