+++ /dev/null
-package org.argeo.app.geo.swt;
-
-import java.util.HashMap;
-import java.util.Locale;
-import java.util.Map;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.CompletionStage;
-
-import org.argeo.api.cms.CmsConstants;
-import org.argeo.api.cms.CmsLog;
-import org.argeo.api.cms.ux.CmsView;
-import org.argeo.app.geo.ux.JsImplementation;
-import org.argeo.app.geo.ux.MapPart;
-import org.argeo.app.ux.SuiteUxEvent;
-import org.argeo.cms.swt.CmsSwtUtils;
-import org.eclipse.swt.SWT;
-import org.eclipse.swt.browser.Browser;
-import org.eclipse.swt.browser.BrowserFunction;
-import org.eclipse.swt.browser.ProgressEvent;
-import org.eclipse.swt.browser.ProgressListener;
-import org.eclipse.swt.layout.GridData;
-import org.eclipse.swt.widgets.Composite;
-
-/**
- * An SWT implementation of {@link MapPart} based on JavaScript execute in a
- * {@link Browser} control.
- */
-public class SwtJavaScriptMapPart extends Composite implements MapPart {
- static final long serialVersionUID = 2713128477504858552L;
-
- private final static CmsLog log = CmsLog.getLog(SwtJavaScriptMapPart.class);
-
- private Browser browser;
-
- private CompletableFuture<Boolean> pageLoaded = new CompletableFuture<>();
-
- private String jsImplementation = JsImplementation.OPENLAYERS_MAP_PART.getJsClass();
- private String mapVar = "globalThis.argeoMap";
-
- private final CmsView cmsView;
-
- public SwtJavaScriptMapPart(Composite parent, int style) {
- super(parent, style);
- parent.setLayout(CmsSwtUtils.noSpaceGridLayout());
- setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
- setLayout(CmsSwtUtils.noSpaceGridLayout());
-
- cmsView = CmsSwtUtils.getCmsView(parent);
-
- browser = new Browser(this, SWT.BORDER);
- browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
-
- // functions exposed to JavaScript
- new onFeatureSelect();
-
- browser.setUrl("/pkg/org.argeo.app.geo.js/index.html");
- browser.addProgressListener(new ProgressListener() {
- static final long serialVersionUID = 1L;
-
- @Override
- public void completed(ProgressEvent event) {
- try {
- // create map
- browser.execute(mapVar + " = new " + jsImplementation + "();");
- pageLoaded.complete(true);
- } catch (Exception e) {
- log.error("Cannot create map in browser", e);
- pageLoaded.complete(false);
- }
- }
-
- @Override
- public void changed(ProgressEvent event) {
- }
- });
- }
-
- @Override
- public void addPoint(double lng, double lat, String style) {
- callMethod(mapVar, "addPoint(%f, %f, %s)", lng, lat, style == null ? "'default'" : style);
- }
-
- @Override
- public void addUrlLayer(String url, GeoFormat format) {
- callMethod(mapVar, "addUrlLayer('%s', '%s')", url, format.name());
- }
-
- @Override
- public void setZoom(int zoom) {
- callMethod(mapVar, "setZoom(%d)", zoom);
- }
-
- @Override
- public void setCenter(double lng, double lat) {
- callMethod(mapVar, "setCenter(%f, %f)", lng, lat);
- }
-
- protected CompletionStage<Object> callMethod(String jsObject, String methodCall, Object... args) {
- return evaluate(jsObject + '.' + methodCall, args);
- }
-
- /**
- * Execute this JavaScript on the client side after making sure that the page
- * has been loaded and the map object has been created.
- *
- * @param js the JavaScript code, possibly formatted according to
- * {@link String#format}, with {@link Locale#ROOT} as locale (for
- * stability of decimal separator, as expected by JavaScript.
- * @param args the optional arguments of
- * {@link String#format(String, Object...)}
- */
- protected CompletionStage<Object> evaluate(String js, Object... args) {
- CompletableFuture<Object> res = pageLoaded.thenApply((ready) -> {
- if (!ready)
- throw new IllegalStateException("Map " + mapVar + " is not initialised.");
- Object result = browser.evaluate(String.format(Locale.ROOT, js, args));
- return result;
- });
- return res.minimalCompletionStage();
- }
-
- /** JavaScript function called when a feature is selected on the map. */
- private class onFeatureSelect extends BrowserFunction {
-
- onFeatureSelect() {
- super(browser, onFeatureSelect.class.getSimpleName());
- }
-
- @Override
- public Object function(Object[] arguments) {
- if (arguments.length == 0)
- return null;
- String path = arguments[0].toString();
- Map<String, Object> properties = new HashMap<>();
- properties.put(SuiteUxEvent.CONTENT_PATH, '/' + CmsConstants.SYS_WORKSPACE + path);
- cmsView.sendEvent(SuiteUxEvent.refreshPart.topic(), properties);
- return null;
- }
-
- }
-}