public Rectangle buildHighlightRectangle(
TreeItem item,
boolean includeChildren,
GC gc,
boolean includeHeaderHeight,
boolean adjustHeight) {
TreeItem parentItem = item.getParentItem();
Rectangle bounds = item.getBounds();
if (parentItem != null) {
bounds = parentItem.getBounds(0);
}
Rectangle itemBounds = item.getBounds();
int x = bounds.x;
int width = itemBounds.width + itemBounds.x - bounds.x;
if (parentItem == null) {
x = 0;
width = bounds.width + bounds.x;
}
Rectangle highlight = new Rectangle(x, itemBounds.y, width, getTree().getItemHeight());
// expand for column text
String columnText = ((ITableLabelProvider) getLabelProvider()).getColumnText(item.getData(), 1);
if (columnText != null) {
Point textExtent = gc.textExtent(columnText);
int textWidth = textExtent.x;
Rectangle columnBounds = item.getBounds(1);
highlight.width = (columnBounds.x + textWidth) - highlight.x;
// increase width to account for space where icon would be
// later we will need to account for the icons directly (currently
// there are no icons for the second column)
highlight.width = highlight.width + 16;
}
// expand for children if necessary
if (includeChildren) {
TreeItem[] children = item.getItems();
if (children.length != 0) {
expandHighlightRectangleForChildren(highlight, children, gc);
}
}
// shrink the rectangle by one pixel so that back to back
// highlights do not overlap
if (adjustHeight) {
int itemSpace = item.getBounds().height - getTree().getItemHeight();
itemSpace = Math.abs(itemSpace);
highlight.height = highlight.height - itemSpace;
}
if (SWT.getPlatform().equals("gtk") && item.getParentItem() != null) { // $NON-NLS-1$
// GTK puts expansion handles directly
// at the location of the parent bounds
// we use that location to start the box
// to allow better looking highlights
// increase the size a bit for linux
highlight.x = highlight.x - 5;
highlight.width = highlight.width + 5;
}
if (includeHeaderHeight) {
highlight.y = highlight.y + getTree().getHeaderHeight();
}
return highlight;
}
TreeItem getItemForDifference(TreeDifference difference) {
for (int i = difference.getPath().getSegmentCount() - 1; i >= 0; i--) {
Object segment = difference.getPath().getSegment(i);
TreeItem item = (TreeItem) findItem(ComparableProvider.getComparableTreeObject(segment));
// if item is null, check for a matching difference with
// element type of EmptyElement
if (item == null) {
if (difference.getMatchingDifference().getElement() instanceof EmptyElement) {
// if not found then locate the item for the empty element
item = (TreeItem) findItem(difference.getMatchingDifference().getElement());
}
}
if (item != null && !item.isDisposed()) {
TreeItem[] topItems = getTree().getItems();
for (TreeItem top : topItems) {
if (top == item) {
return item;
}
}
// else check for expanded state
if (item.getParentItem().getExpanded() && !item.getBounds().isEmpty()) {
return item;
}
}
}
return null;
}
private boolean clickOccurredInIconArea(MouseEvent event, TreeItem item) {
Integer columnNumber = xViewer.getColumnNumberUnderMouseClick(new Point(event.x, event.y));
if (columnNumber == null) {
return false;
}
Rectangle rect = item.getBounds(columnNumber);
return (event.x <= (rect.x + 18));
}
/**
* Calculates the index of the TreeItem at given point.
*
* @param pt the Point in the Viewer
* @return the index of the TreeItem
*/
protected final int findIndexOfTreeItemAt(org.eclipse.draw2d.geometry.Point pt) {
int index = -1;
TreeItem item = findTreeItemAt(pt);
if (item != null) {
index = getHost().getChildren().indexOf(item.getData());
if (index >= 0 && !isInUpperHalf(item.getBounds(), pt)) index++;
}
return index;
}
public static int getColumnAtPos(TreeItem item, int x, int y) {
int columnCount = item.getParent().getColumnCount();
for (int i = 0; i < columnCount; i++) {
Rectangle rect = item.getBounds(i);
if (rect.contains(x, y)) {
return i;
}
}
return -1;
}
/** Repaints the connections on the canvas. */
public void repaint() {
// clear the parent figure
parentFigure.removeAll();
// for each connection create a connection figure and add it to the parent figure
for (Connection c : description.getConnections()) {
TreeItem outputItem =
sourceTreeViewer.findEndpoint(c.getSourceNode(), c.getOutput().getName());
TreeItem inputItem = targetTreeViewer.findEndpoint(c.getTargetNode(), c.getInput().getName());
// calculate the coordinates of the connection figure (the line) on the canvas
if (inputItem != null && outputItem != null) {
int outputY = outputItem.getBounds().y + outputItem.getBounds().height / 2;
int outputX = 0;
int inputY = inputItem.getBounds().y + inputItem.getBounds().height / 2;
int inputX = parentFigure.getBounds().width;
// create the connection figure (the connection line)
ConnectionFigure line =
new ConnectionFigure(c, new Point(outputX, outputY), new Point(inputX, inputY));
// add the connection figure to the parent figure
line.setAntialias(SWT.ON);
parentFigure.add(line);
}
}
}
private Rectangle expandHighlightRectangleForChildren(
Rectangle highlight, TreeItem[] children, GC gc) {
// gather and add all heights, also store the widest width
for (TreeItem child : children) {
if (child.getData() == null
|| child.getBounds().isEmpty()
|| !child.getParentItem().getExpanded()) {
continue;
}
Rectangle childBounds = buildHighlightRectangle(child, true, gc, false, false);
highlight.width = Math.max(highlight.width, childBounds.width + childBounds.x - highlight.x);
highlight.height = highlight.height + childBounds.height;
}
return highlight;
}
/**
* This returns the location of the mouse in the vertical direction, relative to the item widget,
* from 0 (top) to 1 (bottom). NOTE : Copied from DragAndDropCommand.
*
* @param event the {@link DropTargetEvent}
* @return the float representing the vertical direction
*/
protected float getLocation(DropTargetEvent event) {
float result = 0.0F;
if (event.item instanceof TreeItem) {
TreeItem treeItem = (TreeItem) event.item;
Control control = treeItem.getParent();
Point point = control.toControl(new Point(event.x, event.y));
Rectangle bounds = treeItem.getBounds();
result = (float) (point.y - bounds.y) / (float) bounds.height;
} else if (event.item instanceof TableItem) {
TableItem tableItem = (TableItem) event.item;
Control control = tableItem.getParent();
Point point = control.toControl(new Point(event.x, event.y));
Rectangle bounds = tableItem.getBounds(0);
result = (float) (point.y - bounds.y) / (float) bounds.height;
}
return result;
}
public void setErrorMessage(String errorMessage) {
if (tip == null) {
tip = new ErrorToolTip(getTree().getShell());
}
if (errorMessage != "") {
tip.setVisible(false);
TreeItem treeItem = getTree().getSelection()[0];
TreeColumn column = getTree().getColumn(0);
tip.setText(errorMessage);
Point location = new Point(column.getWidth(), treeItem.getBounds().y);
Point controlPoint = getTree().toDisplay(location);
tip.autoSize();
tip.setLocation(controlPoint.x, controlPoint.y - tip.getHeight() - 5);
tip.setVisible(true);
} else {
tip.setVisible(false);
}
}
private void showDropFeedback(DropRequest request) {
Widget hostWidget = ((TreeEditPart) getHost()).getWidget();
Tree tree = getTree();
org.eclipse.draw2d.geometry.Point pt = request.getLocation();
TreeItem item = findTreeItemAt(pt);
if (item == null) {
if (hostWidget == tree) {
insertMarkAfterLastChild(tree.getItems());
}
} else if (item == hostWidget) {
// UNSUPPORTED - api not implemented in RAP
// tree.setInsertMark(null, true);
} else {
boolean before = isInUpperHalf(item.getBounds(), pt);
// UNSUPPORTED - api not implemented in RAP
// tree.setInsertMark(item, before);
}
}
/**
* Returns the host EditPart when appropriate. Targeting is done by checking if the mouse is
* clearly over the host's TreeItem.
*
* @see org.eclipse.gef.EditPolicy#getTargetEditPart(Request)
*/
public EditPart getTargetEditPart(Request req) {
if (req.getType().equals(REQ_ADD)
|| req.getType().equals(REQ_MOVE)
|| req.getType().equals(REQ_CREATE)) {
DropRequest drop = (DropRequest) req;
Point where = new Point(drop.getLocation().x, drop.getLocation().y);
Widget widget = ((TreeEditPart) getHost()).getWidget();
if (widget instanceof Tree) return getHost();
TreeItem treeitem = (TreeItem) widget;
Rectangle bounds = treeitem.getBounds();
int fudge = bounds.height / 5;
Rectangle inner =
new Rectangle(
bounds.x,
bounds.y + fudge,
bounds.width,
bounds.height - (treeitem.getExpanded() ? 0 : fudge * 2));
// Point is either outside the Treeitem, or inside the inner Rect.
if (!bounds.contains(where) || inner.contains(where)) return getHost();
}
return null;
}
/**
* Calculates the needed Y adjustment for the specified control for decorations inside the
* control.
*
* <p>Needed for {@link Tree} under Windows.
*
* @param control the control to calculate the adjustment for
* @return the adjustment in pixels
*/
public static int calculateYAdjustment(final Control control) {
int adjustY = 0;
if (isWindows() && control instanceof Tree) {
/*
* BUG under Windows?
*
* Tree.getClientArea does not return the visible area of the tree, but rather the
* complete area of the tree if there was "room" enough.
*
* The fix is to calculate the y of the top-index and correct with this when saving
* locations inside a Tree.
*
* This code finds the bounds of the first root element. When this is not the top
* element in the view of the tree, the bounds still returned with a negative y...
*/
final Tree t = (Tree) control;
if (t.getItemCount() == 0) return 0;
final TreeItem rootItem = t.getItem(0);
adjustY = -rootItem.getBounds().y;
// LogUtils.debug(control, "Adjust y " + adjustY + " for " + rootItem.getData());
}
return adjustY;
}
