Bug 36672 call hierarchy: Should show a progress bar
The Call Hierarchy view should show a progress bar when searching for callers/callees, allowing the user to abort the search.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java
setImplementorsMode(implementorsMode.intValue());
        }
        Integer ratio = memento.getInteger(TAG_RATIO);
        if (ratio != null) {
            fHierarchyLocationSplitter.setWeights(new int[] {
                    ratio.intValue(), 1000 - ratio.intValue()
                });
        }
        
        fSearchScopeActions.restoreState(memento);
    }
    private void initCallMode() {
        int mode;
        try {
            mode = fDialogSettings.getInt(DIALOGSTORE_CALL_MODE);
            if ((mode < 0) || (mode > 1)) {
                mode = CALL_MODE_CALLERS;
            }
        } catch (NumberFormatException e) {
            mode = CALL_MODE_CALLERS;
        }
        
        fCurrentCallMode = -1;
        
        setCallMode(mode);
    }
    private void initImplementorsMode() {
        int mode;
        
        mode= CallHierarchy.getDefault().isSearchUsingImplementorsEnabled() ? IMPLEMENTORS_ENABLED : IMPLEMENTORS_DISABLED;