/**
* Positions the TableCursor over the cell at the given row and column in the parent table.
*
* @param row the TableItem of the row for the cell to select
* @param column the index of column for the cell to select
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public void setSelection(TableItem row, int column) {
checkWidget();
int columnCount = table.getColumnCount();
int maxColumnIndex = columnCount == 0 ? 0 : columnCount - 1;
if (row == null || row.isDisposed() || column < 0 || column > maxColumnIndex)
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
setRowColumn(table.indexOf(row), column, false);
}
/**
* Positions the TableCursor over the cell at the given row and column in the parent table.
*
* @param row the index of the row for the cell to select
* @param column the index of column for the cell to select
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public void setSelection(int row, int column) {
checkWidget();
int columnCount = table.getColumnCount();
int maxColumnIndex = columnCount == 0 ? 0 : columnCount - 1;
if (row < 0 || row >= table.getItemCount() || column < 0 || column > maxColumnIndex)
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
setRowColumn(row, column, false);
}
void onDispose(Event event) {
removeListener(SWT.Dispose, listener);
notifyListeners(SWT.Dispose, event);
event.type = SWT.None;
table.removeListener(SWT.FocusIn, tableListener);
table.removeListener(SWT.MouseDown, tableListener);
unhookRowColumnListeners();
ScrollBar hBar = table.getHorizontalBar();
if (hBar != null) {
hBar.removeListener(SWT.Selection, resizeListener);
}
ScrollBar vBar = table.getVerticalBar();
if (vBar != null) {
vBar.removeListener(SWT.Selection, resizeListener);
}
}
void _resize() {
if (row == null) {
setBounds(-200, -200, 0, 0);
} else {
int columnIndex = column == null ? 0 : table.indexOf(column);
setBounds(row.getBounds(columnIndex));
}
}
void setRowColumn(TableItem row, TableColumn column, boolean notify) {
if (this.row == row && this.column == column) {
return;
}
if (this.row != null && this.row != row) {
this.row.removeListener(SWT.Dispose, disposeItemListener);
this.row = null;
}
if (this.column != null && this.column != column) {
this.column.removeListener(SWT.Dispose, disposeColumnListener);
this.column.removeListener(SWT.Move, resizeListener);
this.column.removeListener(SWT.Resize, resizeListener);
this.column = null;
}
if (row != null) {
if (this.row != row) {
this.row = row;
row.addListener(SWT.Dispose, disposeItemListener);
table.showItem(row);
}
if (this.column != column && column != null) {
this.column = column;
column.addListener(SWT.Dispose, disposeColumnListener);
column.addListener(SWT.Move, resizeListener);
column.addListener(SWT.Resize, resizeListener);
table.showColumn(column);
}
int columnIndex = column == null ? 0 : table.indexOf(column);
setBounds(row.getBounds(columnIndex));
redraw();
if (notify) {
notifyListeners(SWT.Selection, new Event());
}
}
getAccessible().setFocus(ACC.CHILDID_SELF);
}
/**
* Constructs a new instance of this class given its parent table and a style value describing its
* behavior and appearance.
*
* <p>The style value is either one of the style constants defined in class <code>SWT</code> which
* is applicable to instances of this class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more of those <code>SWT</code> style
* constants. The class description lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
*
* @param parent a Table control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
* </ul>
*
* @see SWT#BORDER
* @see Widget#checkSubclass()
* @see Widget#getStyle()
*/
public TableCursor(Table parent, int style) {
super(parent, style);
table = parent;
setBackground(null);
setForeground(null);
listener =
event -> {
switch (event.type) {
case SWT.Dispose:
onDispose(event);
break;
case SWT.FocusIn:
case SWT.FocusOut:
redraw();
break;
case SWT.KeyDown:
keyDown(event);
break;
case SWT.Paint:
paint(event);
break;
case SWT.Traverse:
{
event.doit = true;
switch (event.detail) {
case SWT.TRAVERSE_ARROW_NEXT:
case SWT.TRAVERSE_ARROW_PREVIOUS:
case SWT.TRAVERSE_RETURN:
event.doit = false;
break;
}
break;
}
}
};
int[] events =
new int[] {SWT.Dispose, SWT.FocusIn, SWT.FocusOut, SWT.KeyDown, SWT.Paint, SWT.Traverse};
for (int i = 0; i < events.length; i++) {
addListener(events[i], listener);
}
tableListener =
event -> {
switch (event.type) {
case SWT.MouseDown:
tableMouseDown(event);
break;
case SWT.FocusIn:
tableFocusIn(event);
break;
}
};
table.addListener(SWT.FocusIn, tableListener);
table.addListener(SWT.MouseDown, tableListener);
disposeItemListener =
event -> {
unhookRowColumnListeners();
row = null;
column = null;
_resize();
};
disposeColumnListener =
event -> {
unhookRowColumnListeners();
row = null;
column = null;
_resize();
};
resizeListener = event -> _resize();
ScrollBar hBar = table.getHorizontalBar();
if (hBar != null) {
hBar.addListener(SWT.Selection, resizeListener);
}
ScrollBar vBar = table.getVerticalBar();
if (vBar != null) {
vBar.addListener(SWT.Selection, resizeListener);
}
getAccessible()
.addAccessibleControlListener(
new AccessibleControlAdapter() {
@Override
public void getRole(AccessibleControlEvent e) {
e.detail = ACC.ROLE_TABLECELL;
}
});
getAccessible()
.addAccessibleListener(
new AccessibleAdapter() {
@Override
public void getName(AccessibleEvent e) {
if (row == null) return;
int columnIndex = column == null ? 0 : table.indexOf(column);
e.result = row.getText(columnIndex);
}
});
}
/**
* Returns the index of the column over which the TableCursor is positioned.
*
* @return the column index for the current position
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public int getColumn() {
checkWidget();
return column == null ? 0 : table.indexOf(column);
}
void setRowColumn(int row, int column, boolean notify) {
TableItem item = row == -1 ? null : table.getItem(row);
TableColumn col = column == -1 || table.getColumnCount() == 0 ? null : table.getColumn(column);
setRowColumn(item, col, notify);
}
void tableMouseDown(Event event) {
if (isDisposed() || !isVisible()) return;
Point pt = new Point(event.x, event.y);
int lineWidth = table.getLinesVisible() ? table.getGridLineWidth() : 0;
TableItem item = table.getItem(pt);
if ((table.getStyle() & SWT.FULL_SELECTION) != 0) {
if (item == null) return;
} else {
int start = item != null ? table.indexOf(item) : table.getTopIndex();
int end = table.getItemCount();
Rectangle clientRect = table.getClientArea();
for (int i = start; i < end; i++) {
TableItem nextItem = table.getItem(i);
Rectangle rect = nextItem.getBounds(0);
if (pt.y >= rect.y && pt.y < rect.y + rect.height + lineWidth) {
item = nextItem;
break;
}
if (rect.y > clientRect.y + clientRect.height) return;
}
if (item == null) return;
}
TableColumn newColumn = null;
int columnCount = table.getColumnCount();
if (columnCount == 0) {
if ((table.getStyle() & SWT.FULL_SELECTION) == 0) {
Rectangle rect = item.getBounds(0);
rect.width += lineWidth;
rect.height += lineWidth;
if (!rect.contains(pt)) return;
}
} else {
for (int i = 0; i < columnCount; i++) {
Rectangle rect = item.getBounds(i);
rect.width += lineWidth;
rect.height += lineWidth;
if (rect.contains(pt)) {
newColumn = table.getColumn(i);
break;
}
}
if (newColumn == null) {
if ((table.getStyle() & SWT.FULL_SELECTION) == 0) return;
newColumn = table.getColumn(0);
}
}
setRowColumn(item, newColumn, true);
setFocus();
return;
}
void paint(Event event) {
if (row == null) return;
int columnIndex = column == null ? 0 : table.indexOf(column);
GC gc = event.gc;
gc.setBackground(getBackground());
gc.setForeground(getForeground());
gc.fillRectangle(event.x, event.y, event.width, event.height);
int x = 0;
Point size = getSize();
Image image = row.getImage(columnIndex);
if (image != null) {
Rectangle imageSize = image.getBounds();
int imageY = (size.y - imageSize.height) / 2;
gc.drawImage(image, x, imageY);
x += imageSize.width;
}
String text = row.getText(columnIndex);
if (text.length() > 0) {
Rectangle bounds = row.getBounds(columnIndex);
Point extent = gc.stringExtent(text);
// Temporary code - need a better way to determine table trim
String platform = SWT.getPlatform();
if ("win32".equals(platform)) { // $NON-NLS-1$
if (table.getColumnCount() == 0 || columnIndex == 0) {
x += 2;
} else {
int alignmnent = column.getAlignment();
switch (alignmnent) {
case SWT.LEFT:
x += 6;
break;
case SWT.RIGHT:
x = bounds.width - extent.x - 6;
break;
case SWT.CENTER:
x += (bounds.width - x - extent.x) / 2;
break;
}
}
} else {
if (table.getColumnCount() == 0) {
x += 5;
} else {
int alignmnent = column.getAlignment();
switch (alignmnent) {
case SWT.LEFT:
x += 5;
break;
case SWT.RIGHT:
x = bounds.width - extent.x - 2;
break;
case SWT.CENTER:
x += (bounds.width - x - extent.x) / 2 + 2;
break;
}
}
}
int textY = (size.y - extent.y) / 2;
gc.drawString(text, x, textY);
}
if (isFocusControl()) {
Display display = getDisplay();
gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.drawFocus(0, 0, size.x, size.y);
}
}
void keyDown(Event event) {
if (row == null) return;
switch (event.character) {
case SWT.CR:
notifyListeners(SWT.DefaultSelection, new Event());
return;
}
int rowIndex = table.indexOf(row);
int columnIndex = column == null ? 0 : table.indexOf(column);
switch (event.keyCode) {
case SWT.ARROW_UP:
setRowColumn(Math.max(0, rowIndex - 1), columnIndex, true);
break;
case SWT.ARROW_DOWN:
setRowColumn(Math.min(rowIndex + 1, table.getItemCount() - 1), columnIndex, true);
break;
case SWT.ARROW_LEFT:
case SWT.ARROW_RIGHT:
{
int columnCount = table.getColumnCount();
if (columnCount == 0) break;
int[] order = table.getColumnOrder();
int index = 0;
while (index < order.length) {
if (order[index] == columnIndex) break;
index++;
}
if (index == order.length) index = 0;
int leadKey = (getStyle() & SWT.RIGHT_TO_LEFT) != 0 ? SWT.ARROW_RIGHT : SWT.ARROW_LEFT;
if (event.keyCode == leadKey) {
setRowColumn(rowIndex, order[Math.max(0, index - 1)], true);
} else {
setRowColumn(rowIndex, order[Math.min(columnCount - 1, index + 1)], true);
}
break;
}
case SWT.HOME:
setRowColumn(0, columnIndex, true);
break;
case SWT.END:
{
int i = table.getItemCount() - 1;
setRowColumn(i, columnIndex, true);
break;
}
case SWT.PAGE_UP:
{
int index = table.getTopIndex();
if (index == rowIndex) {
Rectangle rect = table.getClientArea();
TableItem item = table.getItem(index);
Rectangle itemRect = item.getBounds(0);
rect.height -= itemRect.y;
int height = table.getItemHeight();
int page = Math.max(1, rect.height / height);
index = Math.max(0, index - page + 1);
}
setRowColumn(index, columnIndex, true);
break;
}
case SWT.PAGE_DOWN:
{
int index = table.getTopIndex();
Rectangle rect = table.getClientArea();
TableItem item = table.getItem(index);
Rectangle itemRect = item.getBounds(0);
rect.height -= itemRect.y;
int height = table.getItemHeight();
int page = Math.max(1, rect.height / height);
int end = table.getItemCount() - 1;
index = Math.min(end, index + page - 1);
if (index == rowIndex) {
index = Math.min(end, index + page - 1);
}
setRowColumn(index, columnIndex, true);
break;
}
}
}