Examples with UpdateManager org.eclipse.draw2d.UpdateManager used on opensource projects

Example 1 with UpdateManager

use of org.eclipse.draw2d.UpdateManager in project yamcs-studio by yamcs.

the class OPIRuntimeDelegate method createGUI.

public void createGUI(Composite parent) {
    viewer = new PatchedScrollingGraphicalViewer();
    if (displayModel != null) {
        displayModel.setOpiRuntime(opiRuntime);
        displayModel.setViewer(viewer);
    }
    ScalableFreeformRootEditPart root = new PatchedScalableFreeformRootEditPart() {

        // In Run mode, clicking the Display or container should de-select
        // all widgets.
        @Override
        public DragTracker getDragTracker(Request req) {
            return new DragEditPartsTracker(this);
        }

        @Override
        public boolean isSelectable() {
            return false;
        }
    };
    // set clipping strategy for connection layer of connection can be hide
    // when its source or target is not showing.
    ConnectionLayer connectionLayer = (ConnectionLayer) root.getLayer(LayerConstants.CONNECTION_LAYER);
    connectionLayer.setClippingStrategy(new PatchedConnectionLayerClippingStrategy(connectionLayer));
    viewer.createControl(parent);
    viewer.setRootEditPart(root);
    viewer.setEditPartFactory(new WidgetEditPartFactory(ExecutionMode.RUN_MODE, site));
    // viewer.addDropTargetListener(new
    // ProcessVariableNameTransferDropPVTargetListener(viewer));
    // viewer.addDropTargetListener(new
    // TextTransferDropPVTargetListener(viewer));
    // Add drag listener will make click feel stagnant.
    // viewer.addDragSourceListener(new DragPVSourceListener(viewer));
    // this will make viewer as a selection provider
    EditDomain editDomain = new EditDomain() {

        @Override
        public void loadDefaultTool() {
            setActiveTool(new RuntimePatchedSelectionTool());
        }
    };
    editDomain.addViewer(viewer);
    // connect the CSS menu
    ContextMenuProvider cmProvider = new OPIRunnerContextMenuProvider(viewer, opiRuntime);
    viewer.setContextMenu(cmProvider);
    opiRuntime.getSite().registerContextMenu(cmProvider, viewer);
    if (displayModelFilled) {
        viewer.setContents(displayModel);
        displayModel.setViewer(viewer);
        displayModel.setOpiRuntime(opiRuntime);
        updateEditorTitle();
    }
    zoomManager = root.getZoomManager();
    if (zoomManager != null) {
        List<String> zoomLevels = new ArrayList<>(3);
        zoomLevels.add(Draw2dSingletonUtil.ZoomManager_FIT_ALL);
        zoomLevels.add(Draw2dSingletonUtil.ZoomManager_FIT_WIDTH);
        zoomLevels.add(Draw2dSingletonUtil.ZoomManager_FIT_HEIGHT);
        zoomManager.setZoomLevelContributions(zoomLevels);
        zoomManager.setZoomLevels(createZoomLevels());
    // IAction zoomIn = new ZoomInAction(zoomManager);
    // IAction zoomOut = new ZoomOutAction(zoomManager);
    // getActionRegistry().registerAction(zoomIn);
    // getActionRegistry().registerAction(zoomOut);
    }
    /* scroll-wheel zoom */
    viewer.setProperty(MouseWheelHandler.KeyGenerator.getKey(SWT.MOD1), MouseWheelZoomHandler.SINGLETON);
    /*
         * When Figure instance which corresponds to RootEditPart is updated, calculate the frame rate and set the
         * measured rate to "frame_rate" property of the corresponding DisplayModel instance.
         *
         * By default, org.eclipse.draw2d.DeferredUpdateManager is used. This update manager queues update requests from
         * figures and others, and it repaints requested figures at once when GUI thread is ready to repaint.
         * notifyPainting() method of UpdateLister is called when it repaints. The frame rate is calculated based on the
         * timing of notifyPainting().
         *
         * Note that the update manager repaints only requested figures. It does not repaint all figures at once. For
         * example, if there are only two widgets in one display, these widgets might be repainted alternately. In that
         * case, the frame rate indicates the inverse of the time between the repainting of one widget and the
         * repainting of the other widget, which is different from our intuition. Thus, you have to be careful about the
         * meaning of "frame rate" calculated by the following code.
         */
    if (displayModelFilled && displayModel.isFreshRateEnabled()) {
        UpdateManager updateManager = root.getFigure().getUpdateManager();
        updateManager.addUpdateListener(new UpdateListener() {

            // in milliseconds
            private long updateCycle = -1;

            private Date previousDate = null;

            @Override
            public void notifyPainting(Rectangle damage, @SuppressWarnings("rawtypes") Map dirtyRegions) {
                Date currentDate = new Date();
                if (previousDate == null) {
                    previousDate = currentDate;
                    return;
                }
                synchronized (previousDate) {
                    updateCycle = currentDate.getTime() - previousDate.getTime();
                    displayModel.setFrameRate(1000.0 / updateCycle);
                    previousDate = currentDate;
                }
            }

            @Override
            public void notifyValidating() {
            // Do nothing
            }
        });
    }
}