/** Creates the "Example" widgets. */
void createExampleWidgets() {
/* Compute the widget style */
int style = getDefaultStyle();
if (horizontalButton.getSelection()) style |= SWT.H_SCROLL;
if (verticalButton.getSelection()) style |= SWT.V_SCROLL;
if (borderButton.getSelection()) style |= SWT.BORDER;
if (noBackgroundButton.getSelection()) style |= SWT.NO_BACKGROUND;
if (noFocusButton.getSelection()) style |= SWT.NO_FOCUS;
if (noMergePaintsButton.getSelection()) style |= SWT.NO_MERGE_PAINTS;
if (noRedrawResizeButton.getSelection()) style |= SWT.NO_REDRAW_RESIZE;
/* Create the example widgets */
paintCount = 0;
cx = 0;
cy = 0;
canvas = new Canvas(canvasGroup, style);
canvas.addPaintListener(
new PaintListener() {
public void paintControl(PaintEvent e) {
paintCount++;
GC gc = e.gc;
if (fillDamageButton.getSelection()) {
Color color = e.display.getSystemColor(colors[paintCount % colors.length]);
gc.setBackground(color);
gc.fillRectangle(e.x, e.y, e.width, e.height);
}
Point size = canvas.getSize();
gc.drawArc(cx + 1, cy + 1, size.x - 2, size.y - 2, 0, 360);
gc.drawRectangle(cx + (size.x - 10) / 2, cy + (size.y - 10) / 2, 10, 10);
}
});
canvas.addControlListener(
new ControlAdapter() {
public void controlResized(ControlEvent event) {
Point size = canvas.getSize();
maxX = size.x * 3 / 2;
maxY = size.y * 3 / 2;
resizeScrollBars();
}
});
ScrollBar bar = canvas.getHorizontalBar();
if (bar != null) {
bar.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
scrollHorizontal((ScrollBar) event.widget);
}
});
}
bar = canvas.getVerticalBar();
if (bar != null) {
bar.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
scrollVertical((ScrollBar) event.widget);
}
});
}
}
/**
* Installs this highlighter into the specified StyledText object. Client can manually call
* detach() method, then wants to destroy this object.
*/
public void attach(StyledText parent) {
detach();
text = parent;
text.addDisposeListener(ml);
text.addLineStyleListener(ml);
text.addLineBackgroundListener(ml);
text.addPaintListener(ml);
text.addVerifyListener(ml);
text.addExtendedModifyListener(ml);
text.addControlListener(ml);
text.addKeyListener(ml);
text.addTraverseListener(ml);
text.addMouseListener(ml);
text.addSelectionListener(ml);
text.getContent().addTextChangeListener(ml);
ScrollBar sb = text.getVerticalBar();
if (sb != null) sb.addSelectionListener(ml);
updateViewport();
new Thread() {
public void run() {
// setPriority(Thread.NORM_PRIORITY-1);
while (true) {
try {
sleep(300);
} catch (InterruptedException e) {
}
if (baseEditor == null || text == null) break;
if (backParserDelay) {
backParserDelay = false;
try {
sleep(1500);
} catch (InterruptedException e) {
}
continue;
}
;
Display.getDefault()
.syncExec(
new Runnable() {
public void run() {
if (baseEditor == null || text == null) return;
if (text.isDisposed()) return;
// System.out.println(System.currentTimeMillis());
baseEditor.idleJob(80);
// redrawFrom(text.getLineAtOffset(text.getCaretOffset()));
}
});
}
;
};
}.start();
}
/**
* Removes this object from the corresponding StyledText widget. Object can't be used after this
* call, until another attach. This method is called automatically, when StyledText widget is
* disposed
*/
public void detach() {
if (text == null) return;
text.removeDisposeListener(ml);
text.removeLineStyleListener(ml);
text.removeLineBackgroundListener(ml);
text.removePaintListener(ml);
text.removeVerifyListener(ml);
text.removeExtendedModifyListener(ml);
text.removeControlListener(ml);
text.removeKeyListener(ml);
text.removeTraverseListener(ml);
text.removeMouseListener(ml);
text.removeSelectionListener(ml);
ScrollBar sb = text.getVerticalBar();
if (sb != null) sb.removeSelectionListener(ml);
baseEditor = null;
}
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);
}
}
/**
* Scrolls the canvas vertically.
*
* @param scrollBar
*/
void scrollVertical(ScrollBar scrollBar) {
Rectangle bounds = canvas.getClientArea();
int y = -scrollBar.getSelection();
if (y + maxY < bounds.height) {
y = bounds.height - maxY;
}
canvas.scroll(cx, y, cx, cy, maxX, maxY, false);
cy = y;
}
/**
* Scrolls the canvas horizontally.
*
* @param scrollBar
*/
void scrollHorizontal(ScrollBar scrollBar) {
Rectangle bounds = canvas.getClientArea();
int x = -scrollBar.getSelection();
if (x + maxX < bounds.width) {
x = bounds.width - maxX;
}
canvas.scroll(x, cy, cx, cy, maxX, maxY, false);
cx = x;
}
/** Resizes the maximum and thumb of both scrollbars. */
void resizeScrollBars() {
Rectangle clientArea = canvas.getClientArea();
ScrollBar bar = canvas.getHorizontalBar();
if (bar != null) {
bar.setMaximum(maxX);
bar.setThumb(clientArea.width);
bar.setPageIncrement(clientArea.width);
}
bar = canvas.getVerticalBar();
if (bar != null) {
bar.setMaximum(maxY);
bar.setThumb(clientArea.height);
bar.setPageIncrement(clientArea.height);
}
}
/**
* 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);
}
});
}