/**
* Draws the current line highlight (over top using theme colors and alpha). If the line highlight
* is fully opaque, then this method will not do anything and we'll fall back to using the
* mechanism eclipse does in CursorLinePainter with a little modification.
*/
public void paintControl(PaintEvent e) {
// if highlight current line is disabled, don't draw!
if (!fEnabled) {
return;
}
// If there's no alpha value for the line highlight, then we need to force the bg color of the
// whole line
// to the rgb value!
RGBa lineHighlight = getCurrentTheme().getLineHighlight();
if (lineHighlight.isFullyOpaque()) {
return;
}
Rectangle rect = new Rectangle(e.x, e.y, e.width, e.height);
Rectangle lineRect = getLineRectangle(getCurrentLinePosition());
if (lineRect == null || !lineRect.intersects(rect)) {
return;
}
int previousAlpha = e.gc.getAlpha();
Color previousBG = e.gc.getBackground();
e.gc.setAlpha(lineHighlight.getAlpha());
e.gc.setBackground(getColorManager().getColor(lineHighlight.toRGB()));
// Only paint the part of lineRect that is contained in rect!
e.gc.fillRectangle(lineRect.intersection(rect));
// BUGFIX: need to set alpha and background color back to what they were before or it breaks
// the painting of pair matching!
e.gc.setAlpha(previousAlpha);
e.gc.setBackground(previousBG);
}
/**
* Hook to compute the menu location if the focus widget is a tree widget.
*
* @param tree the tree widget that has the focus
* @return a widget relative position of the menu to pop up or <code>null</code> if now position
* inside the widget can be computed
*/
protected Point computeMenuLocation(Tree tree) {
TreeItem[] items = tree.getSelection();
Rectangle clientArea = tree.getClientArea();
switch (items.length) {
case 0:
return null;
case 1:
Rectangle bounds = items[0].getBounds();
Rectangle intersect = clientArea.intersection(bounds);
if (intersect != null && intersect.height == bounds.height) {
return new Point(
Math.max(0, bounds.x + getAvarageCharWith(tree) * CHAR_INDENT),
bounds.y + bounds.height);
} else {
return null;
}
default:
Rectangle[] rectangles = new Rectangle[items.length];
for (int i = 0; i < rectangles.length; i++) {
rectangles[i] = items[i].getBounds();
}
Point cursorLocation = tree.getDisplay().getCursorLocation();
Point result =
findBestLocation(
getIncludedPositions(rectangles, clientArea), tree.toControl(cursorLocation));
if (result != null) result.x = result.x + getAvarageCharWith(tree) * CHAR_INDENT;
return result;
}
}
private void refreshProposalSize() {
if (contentProposalAdapter != null) {
Rectangle maxSize =
new Rectangle(0, 0, MAX_WIDTH_PROPOSAL_STYLED_TEXT, MAX_HEIGHT_PROPOSAL_STYLED_TEXT);
Rectangle boundsStyledText = StyledTextHandler.this.getStyledText().getBounds();
Rectangle intersect = boundsStyledText.intersection(maxSize);
Point sizeProposal = new Point(intersect.width, intersect.height);
contentProposalAdapter.setPopupSize(sizeProposal);
}
}
private Point[] getIncludedPositions(Rectangle[] rectangles, Rectangle widgetBounds) {
List result = new ArrayList();
for (int i = 0; i < rectangles.length; i++) {
Rectangle rectangle = rectangles[i];
Rectangle intersect = widgetBounds.intersection(rectangle);
if (intersect != null && intersect.height == rectangle.height) {
result.add(new Point(intersect.x, intersect.y + intersect.height));
}
}
return (Point[]) result.toArray(new Point[result.size()]);
}
/** Moves the target control on top of the dummy control. */
public void layout() {
if (getTargetControl() == null) {
return;
}
// Compute the unclipped bounds of the target in display coordinates
Rectangle displayBounds = Geometry.toDisplay(control.getParent(), control.getBounds());
// Clip the bounds of the target so that it doesn't go outside the dummy control's parent
Rectangle clippingRegion = DragUtil.getDisplayBounds(control.getParent());
displayBounds = displayBounds.intersection(clippingRegion);
// Compute the bounds of the target, in the local coordinate system of its parent
Rectangle targetBounds = Geometry.toControl(getTargetControl().getParent(), displayBounds);
// Move the target
getTargetControl().setBounds(targetBounds);
}
/* Paint function */
private void paint(GC gc) {
Rectangle clientRect = getClientArea(); // Canvas' painting area
if (sourceImage != null) {
Rectangle imageRect = SWTUtil.inverseTransformRect(transform, clientRect);
int gap = 2; // find a better start point to render
imageRect.x -= gap;
imageRect.y -= gap;
imageRect.width += 2 * gap;
imageRect.height += 2 * gap;
Rectangle imageBound = sourceImage.getBounds();
imageRect = imageRect.intersection(imageBound);
Rectangle destRect = SWTUtil.transformRect(transform, imageRect);
if (screenImage != null) screenImage.dispose();
screenImage = new Image(getDisplay(), clientRect.width, clientRect.height);
GC newGC = new GC(screenImage);
newGC.setClipping(clientRect);
newGC.drawImage(
sourceImage,
imageRect.x,
imageRect.y,
imageRect.width,
imageRect.height,
destRect.x,
destRect.y,
destRect.width,
destRect.height);
newGC.dispose();
gc.drawImage(screenImage, 0, 0);
} else {
gc.setClipping(clientRect);
gc.fillRectangle(clientRect);
initScrollBars();
}
}
