Add a Cancel button to the Settings activity

src/main/java/com/sheepit/client/standalone/swing/activity/Settings.java

@@ -100,6 +100,7 @@ public class Settings implements Activity {
 	
 	private JCheckBox saveFile;
 	private JCheckBox autoSignIn;
+	JButton cancelButton;
 	JButton saveButton;
 	
 	private boolean haveAutoStarted;
@@ -497,7 +498,8 @@ public class Settings implements Activity {
 		// general settings
 		JPanel general_panel = new JPanel(new GridLayout(1, 2));
 		
-		saveFile = new JCheckBox("Save settings", true);
+		saveFile = new JCheckBox("Write settings to file", true);
+		saveFile.addActionListener(new SaveSettingsFileAction());
 		general_panel.add(saveFile);
 		
 		autoSignIn = new JCheckBox("Auto sign in", config.isAutoSignIn());
@@ -511,24 +513,33 @@ public class Settings implements Activity {
 		parent.getContentPanel().add(general_panel, constraints);
 		
 		currentRow++;
+		constraints.gridx = 0;
 		constraints.gridy = currentRow;
+		constraints.gridwidth = 2;
 		parent.getContentPanel().add(new JLabel(" "), constraints);    // Add a separator between last checkboxes and button
 		
-		currentRow++;
+		// Close buttons (Discard / Save)
-		String buttonText = "Start";
+		// Only show Discard button if there is a client running to close back to
-		if (parent.getClient() != null) {
+		boolean isClientRunning = parent.getClient() != null && parent.getClient().isRunning();
-			if (parent.getClient().isRunning()) {
+		int savePanelCols = isClientRunning ? 2 : 1;
-				buttonText = "Save";
+		JPanel savePanel = new JPanel(new GridLayout(1, savePanelCols));
-			}
+		
+		if (isClientRunning) {
+			cancelButton = new JButton("Discard & go back");
+			cancelButton.addActionListener(new CancelAction());
+			savePanel.add(cancelButton);
 		}
-		saveButton = new JButton(buttonText);
+		
-		checkDisplaySaveButton();
+		saveButton = new JButton("Save & go back");
+		checkDisplaySaveButton(); 	 // Sets the button text and enabled state
 		saveButton.addActionListener(new SaveAction());
+		savePanel.add(saveButton);
+		
 		currentRow++;
 		constraints.gridwidth = 2;
 		constraints.gridx = 0;
 		constraints.gridy = currentRow;
-		parent.getContentPanel().add(saveButton, constraints);
+		parent.getContentPanel().add(savePanel, constraints);
 
 		// Increase the size of the app Window to ensure it shows all the information with the Advanced Options panel opened.
 		parent.setSize(520,850);
@@ -553,6 +564,20 @@ public class Settings implements Activity {
 			selected = false;
 		}
 		
+		boolean isClientRunning = parent.getClient() != null && parent.getClient().isRunning();
+		if (isClientRunning) {
+			if (saveFile.isSelected()) {
+				saveButton.setText("Save & go back");
+			} else {
+				saveButton.setText("Apply & go back");
+			}
+		} else {
+			if (saveFile.isSelected()) {
+				saveButton.setText("Save & start");
+			} else {
+				saveButton.setText("Apply & start");
+			}
+		}
 		saveButton.setEnabled(selected);
 		return selected;
 	}
@@ -641,6 +666,24 @@ public class Settings implements Activity {
 		}
 	}
 	
+	class CancelAction implements ActionListener {
+		
+		@Override public void actionPerformed(ActionEvent e) {
+			if (parent == null) {
+				return;
+			}
+			
+			Configuration config = parent.getConfiguration();
+			if (config == null) {
+				return;
+			}
+			
+			applyTheme(config.getTheme());    // apply the proper theme (light/dark)
+			
+			parent.showActivity(GuiSwing.ActivityType.WORKING);
+		}
+	}
+	
 	class SaveAction implements ActionListener {
 		
 		@Override public void actionPerformed(ActionEvent e) {
@@ -813,6 +856,13 @@ public class Settings implements Activity {
 		}
 	}
 	
+	class SaveSettingsFileAction implements ActionListener {
+		
+		@Override public void actionPerformed(ActionEvent e) {
+			checkDisplaySaveButton();
+		}
+	}
+	
 	class JCheckBoxGPU extends JCheckBox {
 		private GPUDevice gpu;