Feature: improve the application exit-button process (#214)

* Improve the application exit-button behaviour

.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
@@ -11,7 +12,6 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useAutoImport" value="true" />
         <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>

src/com/sheepit/client/Client.java

@@ -135,6 +135,7 @@ public class Client {
 			Thread thread_sender = new Thread(runnable_sender);
 			thread_sender.start();
 			
+			do {
 				while (this.running == true) {
 					this.renderingJob = null;
 					synchronized (this) {
@@ -368,14 +369,20 @@ public class Client {
 					this.log.removeCheckPoint(step);
 				}
 				
-			// not running but maybe still sending frame
+				// If we reach this point is bc the main loop (the one that controls all the workflow) has exited
-			while (this.jobsToValidate.isEmpty() == false) {
+				// due to user requesting to exit the App and we are just waiting for the upload queue to empty
+				// If the user cancels the exit, then this.running will be true and the main loop will take
+				// control again
 				try {
 					Thread.sleep(2300); // wait a little bit
+					this.gui.status("Uploading rendered frames before exiting. Please wait");
 				}
 				catch (InterruptedException e3) {
 				}
-			}
+				
+				// This loop will remain valid until all the background uploads have
+				// finished (unless the stop() method has been triggered)
+			} while (this.uploadQueueSize > 0);
 		}
 		catch (Exception e1) {
 			// no exception should be raised in the actual launcher (applet or standalone)
@@ -532,7 +539,6 @@ public class Client {
 	}
 	
 	/**
-	 * 
 	 * @return the date of the next request, or null if there is not delay (null <=> now)
 	 */
 	public Calendar nextJobRequest() {
@@ -615,7 +621,8 @@ public class Client {
 		}
 
 		Observer removeSceneDirectoryOnceRenderHasStartedObserver = new Observer() {
-			@Override public void update(Observable observable, Object o) {
+			@Override
+			public void update(Observable observable, Object o) {
 				// only remove the .blend since it's most important data
 				// and it's the only file we are sure will not be needed anymore
 				scene_file.delete();

src/com/sheepit/client/standalone/swing/activity/Working.java

@@ -39,6 +39,7 @@ import javax.swing.BoxLayout;
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
 import javax.swing.JLabel;
+import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.UIManager;
 import javax.swing.Spring;
@@ -230,7 +231,7 @@ public class Working implements Activity {
 		JButton blockJob = new JButton("Block this project");
 		blockJob.addActionListener(new blockJobAction());
 		
-		exitAfterFrame = new JButton("Exit after this frame");
+		exitAfterFrame = new JButton("Exit");
 		exitAfterFrame.addActionListener(new ExitAfterAction());
 		
 		buttonsPanel.add(settingsButton);
@@ -315,6 +316,22 @@ public class Working implements Activity {
 				(queueSize > 0 ? String.format(" (%.2fMB) ", (queueVolume / 1024.0 / 1024.0)) : ""),
 				(queueSize == this.parent.getConfiguration().getMaxUploadingJob() ? "- Queue full!" : "")
 		));
+		
+		// If the user has requested to exit, then we need to update the JButton with the queue size
+		if (this.exitAfterFrame.getText().startsWith("Cancel")) {
+			Client client = parent.getClient();
+			
+			if (client != null) {
+				if (client.isRunning()) {
+					queueSize++;
+				}
+			}
+			
+			exitAfterFrame.setText(String.format("Cancel exit (%s frame%s to go)",
+					queueSize,
+					(queueSize > 1 ? "s" : ""))
+			);
+		}
 	}
 	
 	public void updateTime() {
@@ -475,11 +492,39 @@ public class Working implements Activity {
 			Client client = parent.getClient();
 			if (client != null) {
 				if (client.isRunning()) {
-					exitAfterFrame.setText("Cancel exit");
+					String[] exitJobOptions = {"Exit after current Jobs", "Exit Immediately", "Do Nothing"};
+					int jobsQueueSize = client.getUploadQueueSize() + (client.isRunning() ? 1 : 0);
+
+					int userDecision = JOptionPane.showOptionDialog(
+							null,
+							String.format("<html>You have <strong>%d frame%s</strong> being uploaded or rendered. Do you want to finish the jobs or exit now?.\n\n",
+									jobsQueueSize ,   // Add the current frame to the total count ONLY if the client is running
+									(jobsQueueSize > 1 ? "s" : ""),
+									(jobsQueueSize > 1 ? (jobsQueueSize + " ") : ""),
+									(jobsQueueSize > 1 ? "s" : "")
+							),
+							"Exit Now or Later",
+							JOptionPane.DEFAULT_OPTION,
+							JOptionPane.QUESTION_MESSAGE,
+							null,
+							exitJobOptions,
+							exitJobOptions[2]);    // Make the "Do nothing" button the default one to avoid mistakes
+					
+					if (userDecision == 0) {
+						exitAfterFrame.setText(String.format("Cancel exit (%s frame%s to go)",
+								jobsQueueSize,
+								(jobsQueueSize > 1 ? "s" : ""))
+						);
+						
 						client.askForStop();
 					}
+					else if (userDecision == 1) {
+						client.stop();
+						System.exit(0);
+					}
+				}
 				else {
-					exitAfterFrame.setText("Exit after this frame");
+					exitAfterFrame.setText("Exit");
 					client.cancelStop();
 				}
 			}
@@ -498,5 +543,4 @@ public class Working implements Activity {
 			}
 		}
 	}
-	
 }