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code_samples/max_opened_projects/src/main/java/org/intellij/sdk/utils/SdkBalloonHelper.java
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| // Copyright 2000-2020 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file. | ||
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| package org.intellij.sdk.utils; | ||
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| import com.intellij.openapi.project.Project; | ||
| import com.intellij.openapi.project.ProjectManager; | ||
| import com.intellij.openapi.ui.popup.Balloon; | ||
| import com.intellij.openapi.ui.popup.JBPopupFactory; | ||
| import com.intellij.openapi.util.Disposer; | ||
| import com.intellij.openapi.wm.WindowManager; | ||
| import com.intellij.util.ui.UIUtil; | ||
| import org.jetbrains.annotations.NotNull; | ||
| import org.jetbrains.annotations.Nullable; | ||
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| import javax.swing.*; | ||
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| /** | ||
| * This is just a utility class to help communicate the state of this plugin using Popups | ||
| * | ||
| * @see <a href="https://www.jetbrains.org/intellij/sdk/docs/user_interface_components/popups.html">Popup documentation</a> | ||
| */ | ||
| public class SdkBalloonHelper { | ||
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| public static SdkBalloonHelper getSdkBalloonHelper() { | ||
| return new SdkBalloonHelper(); | ||
| } | ||
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| /** | ||
| * This method constructs a Balloon-type popup and displays it in the middle of a Project window. | ||
| * Adds the Balloon to the Project's Disposer | ||
| * | ||
| * @param project The Project to host the Balloon. | ||
| * @param title A short description of what the Balloon conveys | ||
| * @param message Detailed information | ||
| */ | ||
| public void showBalloon(@Nullable Project project, @NotNull String title, @NotNull String message) { | ||
| // Ensure the project is open. If not, use the next youngest one to show the balloon | ||
| Project displayProject = findValidProject(project); | ||
| if (displayProject == null) return; | ||
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| // Verify the place to put the balloon | ||
| JRootPane pane = getProjectRootPane(displayProject); | ||
| if (pane == null) return; | ||
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| // Construct the balloon | ||
| JLabel component = new JLabel("<html>" + message + "</html>"); | ||
| final Balloon balloon = JBPopupFactory.getInstance().createBalloonBuilder(component) | ||
| .setShadow(true) | ||
| .setHideOnClickOutside(true) | ||
| .setHideOnAction(false) | ||
| .setFillColor(UIUtil.getControlColor()) | ||
| .setTitle(title) | ||
| .setFadeoutTime(6000) | ||
| .createBalloon(); | ||
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| // Register it for disposal with the project that will display it | ||
| Disposer.register(displayProject, balloon); | ||
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| // Show the balloon in the middle of the project's window - it will disappear per the animation | ||
| balloon.showInCenterOf(pane); | ||
| } | ||
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| /** | ||
| * This function verifies that the provided Project is still open. | ||
| * If the Project is not open (closed, or in some state of disposal,) | ||
| * the function tries to find the next most-recently opened Project. | ||
| * | ||
| * @param dodgyProject The Project to be verified as open | ||
| * @return dodgyProject if it is verified as open, | ||
| * Or the last Project listed in ProjectManager's list of open Projects. | ||
| * Or null if no other Projects are open. (Edge case when IDE is closing.) | ||
| */ | ||
| @Nullable | ||
| private Project findValidProject(@Nullable Project dodgyProject) { | ||
| Project validProject = dodgyProject; | ||
| if ((validProject == null) || !validProject.isOpen()) { | ||
| // Find the next most-recently opened Project that is still open. | ||
| ProjectManager projectManager = ProjectManager.getInstance(); | ||
| Project[] allProjects = projectManager.getOpenProjects(); | ||
| validProject = allProjects.length > 0 ? allProjects[allProjects.length - 1] : null; | ||
| } | ||
| return validProject; | ||
| } | ||
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| /** | ||
| * This function gets the JRootPane for an open Project | ||
| * | ||
| * @param project The open Project | ||
| * @return A valid JRootPane for the Project | ||
| * Otherwise null | ||
| */ | ||
| @Nullable | ||
| private JRootPane getProjectRootPane(@Nullable Project project) { | ||
| JRootPane projectPane = null; | ||
| if ((project != null) && project.isOpen()) { | ||
| // Get the frame for the project, then the JRootPane | ||
| final WindowManager manager = WindowManager.getInstance(); | ||
| final JFrame frame = manager.getFrame(project); | ||
| projectPane = frame != null ? frame.getRootPane() : null; | ||
| } | ||
| return projectPane; | ||
| } | ||
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| } |