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appinventor/appengine/src/com/google/appinventor/client/actions/ShowShortcutsAction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| // -*- mode: java; c-basic-offset: 2; -*- | ||
| // Copyright 2009-2011 Google, All Rights reserved | ||
| // Copyright 2011-2023 MIT, All rights reserved | ||
| // Released under the Apache License, Version 2.0 | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
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| package com.google.appinventor.client.actions; | ||
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| import static com.google.appinventor.client.Ode.MESSAGES; | ||
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| import com.google.appinventor.client.Ode; | ||
| import com.google.gwt.dom.client.NativeEvent; | ||
| import com.google.gwt.event.dom.client.KeyCodes; | ||
| import com.google.gwt.user.client.Command; | ||
| import com.google.gwt.user.client.Event; | ||
| import com.google.gwt.user.client.ui.Button; | ||
| import com.google.gwt.user.client.ui.DialogBox; | ||
| import com.google.gwt.user.client.ui.HTML; | ||
| import com.google.gwt.user.client.ui.VerticalPanel; | ||
|
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| public class ShowShortcutsAction implements Command { | ||
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| private DialogBox db; | ||
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| public ShowShortcutsAction() { | ||
| db = new DialogBox(true, false); | ||
| db.setText("Keyboard Shortcuts"); | ||
| db.setStyleName("ode-DialogBox"); | ||
| db.setHeight("200px"); | ||
| db.setWidth("400px"); | ||
| db.setGlassEnabled(true); | ||
| db.setAnimationEnabled(true); | ||
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| shortcutKeyHandler(); | ||
| } | ||
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| @Override | ||
| public void execute() { | ||
| VerticalPanel DialogBoxContents = new VerticalPanel(); | ||
| HTML message = new HTML(MESSAGES.KeyBoardShortcuts()); | ||
| Button button = new Button(Ode.MESSAGES.okButton()); | ||
| button.addClickHandler(event -> db.hide()); | ||
| DialogBoxContents.add(message); | ||
| DialogBoxContents.add(button); | ||
| db.setWidget(DialogBoxContents); | ||
| db.center(); | ||
| db.show(); | ||
| button.setFocus(true); | ||
| } | ||
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| private void shortcutKeyHandler() { | ||
| Event.addNativePreviewHandler(new Event.NativePreviewHandler() { | ||
| @Override | ||
| public void onPreviewNativeEvent(Event.NativePreviewEvent event) { | ||
| NativeEvent nativeEvent = event.getNativeEvent(); | ||
| if (event.getTypeInt() == Event.ONKEYDOWN) { | ||
| if (nativeEvent.getKeyCode() == 191 && nativeEvent.getAltKey()) { | ||
| shortcutPressed(); | ||
| } | ||
| if (nativeEvent.getKeyCode() == KeyCodes.KEY_ESCAPE) { | ||
| escPressed(); | ||
| } | ||
| } | ||
| } | ||
| }); | ||
| } | ||
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| private void shortcutPressed() { | ||
| if (!db.isShowing()) { | ||
| execute(); | ||
| } | ||
| } | ||
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| private void escPressed() { | ||
| if (db.isShowing()) { | ||
| db.hide(); | ||
| } | ||
| } | ||
| } |
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