Improve UX for saving files

ui/src/main/java/edu/wpi/grip/ui/MainWindowController.java

@@ -1,5 +1,6 @@
 package edu.wpi.grip.ui;
 
+import edu.wpi.grip.core.GripFileManager;
 import edu.wpi.grip.core.Palette;
 import edu.wpi.grip.core.Pipeline;
 import edu.wpi.grip.core.PipelineRunner;
@@ -33,7 +34,6 @@
 import java.io.IOException;
 import java.util.Optional;
 import java.util.Set;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javafx.application.Platform;
@@ -154,11 +154,7 @@ private boolean showConfirmationDialogAndWait() {
       } else if (dialog.getResult().equals(save)) {
         // If the user chose "Save", automatically show a save dialog and block until the user
         // has had a chance to save the project.
-        try {
-          return saveProject();
-        } catch (IOException e) {
-          logger.log(Level.SEVERE, e.getMessage(), e.getCause());
-        }
+        return saveProject();
       }
     }
     return true;
@@ -219,10 +215,18 @@ public void openProject() {
    * @return true if the user does not cancel the save
    */
   @FXML
-  public boolean saveProject() throws IOException {
+  public boolean saveProject() {
     if (project.getFile().isPresent()) {
       // Immediately save the project to whatever file it was loaded from or last saved to.
-      project.save(project.getFile().get());
+      try {
+        project.save(project.getFile().get());
+      } catch (IOException e) {
+        eventBus.post(new WarningEvent("Could not save project",
+            "The project could not be saved to " + project.getFile().get().getAbsolutePath()
+                + ".\n\nCause: " + e.getMessage()
+        ));
+        return false;
+      }
       return true;
     } else {
       return saveProjectAs();
@@ -237,10 +241,11 @@ public boolean saveProject() throws IOException {
    * @return true if the user does not cancel the save
    */
   @FXML
-  public boolean saveProjectAs() throws IOException {
+  public boolean saveProjectAs() {
     final FileChooser fileChooser = new FileChooser();
     fileChooser.setTitle("Save Project As");
     fileChooser.getExtensionFilters().add(new ExtensionFilter("GRIP File", "*.grip"));
+    fileChooser.setInitialDirectory(GripFileManager.GRIP_DIRECTORY);
 
     project.getFile().ifPresent(file -> fileChooser.setInitialDirectory(file.getParentFile()));
 
@@ -249,7 +254,14 @@ public boolean saveProjectAs() throws IOException {
       return false;
     }
 
-    project.save(file);
+    try {
+      project.save(file);
+    } catch (IOException e) {
+      eventBus.post(new WarningEvent("Could not save project",
+          "The project could not be saved to " + file.getAbsolutePath()
+              + ".\n\nCause: " + e.getMessage()));
+      return false;
+    }
     return true;
   }