private void handleWidgetSelection(Event e, ToolItem item) {
boolean selection = item.getSelection();
int style = item.getStyle();
IAction action = (IAction) actionMap.get(item);
if ((style & (SWT.TOGGLE | SWT.CHECK)) != 0) {
if (action.getStyle() == IAction.AS_CHECK_BOX) {
action.setChecked(selection);
}
} else if ((style & SWT.RADIO) != 0) {
if (action.getStyle() == IAction.AS_RADIO_BUTTON) {
action.setChecked(selection);
}
} else if ((style & SWT.DROP_DOWN) != 0) {
if (e.detail == 4) { // on drop-down button
if (action.getStyle() == IAction.AS_DROP_DOWN_MENU) {
IMenuCreator mc = action.getMenuCreator();
ToolItem ti = (ToolItem) item;
if (mc != null) {
Menu m = mc.getMenu(ti.getParent());
if (m != null) {
Point point = ti.getParent().toDisplay(new Point(e.x, e.y));
m.setLocation(point.x, point.y); // waiting
m.setVisible(true);
return; // we don't fire the action
}
}
}
}
}
action.runWithEvent(e);
}
@Override
public Node item(int index) {
ToolItem item = getToolItem();
if ((item.getStyle() & SWT.SEPARATOR) == SWT.SEPARATOR) {
Object control = item.getControl();
if (control != null) {
return getElement(control);
}
}
return null;
}
boolean hasOnlySeparators(ToolBar toolbar) {
ToolItem[] children = toolbar.getItems();
for (ToolItem toolItem : children) {
if ((toolItem.getStyle() & SWT.SEPARATOR) == 0) {
return false;
} else if (toolItem.getControl() != null
&& toolItem.getControl().getData(OWNING_ME) instanceof MToolControl) {
return false;
}
}
return true;
}
boolean isTabGroup() {
ToolItem[] tabList = parent._getTabItemList();
if (tabList != null) {
for (int i = 0; i < tabList.length; i++) {
if (tabList[i] == this) return true;
}
}
if ((style & SWT.SEPARATOR) != 0) return true;
int index = parent.indexOf(this);
if (index == 0) return true;
ToolItem previous = parent.getItem(index - 1);
return (previous.getStyle() & SWT.SEPARATOR) != 0;
}
/**
* Attempts to update the existing toolbar actions, if the action list is similar to the current
* list. Returns false if this cannot be done and the contents must be replaced.
*/
private boolean updateActions(@NonNull List<RuleAction> actions) {
List<RuleAction> before = mPrevActions;
List<RuleAction> after = actions;
if (before == null) {
return false;
}
if (!before.equals(after) || after.size() > mLayoutToolBar.getItemCount()) {
return false;
}
int actionIndex = 0;
for (int i = 0, max = mLayoutToolBar.getItemCount(); i < max; i++) {
ToolItem item = mLayoutToolBar.getItem(i);
int style = item.getStyle();
Object data = item.getData();
if (data != null) {
// One action can result in multiple toolbar items (e.g. a choice action
// can result in multiple radio buttons), so we've have to replace all of
// them with the corresponding new action
RuleAction prevAction = before.get(actionIndex);
while (prevAction != data) {
actionIndex++;
if (actionIndex == before.size()) {
return false;
}
prevAction = before.get(actionIndex);
if (prevAction == data) {
break;
} else if (!(prevAction instanceof RuleAction.Separator)) {
return false;
}
}
RuleAction newAction = after.get(actionIndex);
assert newAction.equals(prevAction); // Maybe I can do this lazily instead?
// Update action binding to the new action
item.setData(newAction);
// Sync button states: the checked state is not considered part of
// RuleAction equality
if ((style & SWT.CHECK) != 0) {
assert newAction instanceof Toggle;
Toggle toggle = (Toggle) newAction;
item.setSelection(toggle.isChecked());
} else if ((style & SWT.RADIO) != 0) {
assert newAction instanceof Choices;
Choices choices = (Choices) newAction;
String current = choices.getCurrent();
String id = (String) item.getData(ATTR_ID);
boolean selected = Strings.nullToEmpty(current).equals(id);
item.setSelection(selected);
}
} else {
// Must be a separator, or a label (which we insert for nested widgets)
assert (style & SWT.SEPARATOR) != 0 || !item.getText().isEmpty() : item;
}
}
return true;
}
@Override
public int getLength() {
ToolItem item = getToolItem();
return (item.getStyle() & SWT.SEPARATOR) == SWT.SEPARATOR && item.getControl() != null ? 1 : 0;
}