Adding option to collapse panels in settings

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

@@ -57,6 +57,7 @@ import com.sheepit.client.hardware.gpu.GPUDevice;
 import com.sheepit.client.network.Proxy;
 import com.sheepit.client.os.OS;
 import com.sheepit.client.standalone.GuiSwing;
+import com.sheepit.client.standalone.swing.components.CollapsibleJPanel;
 
 public class Settings implements Activity {
 	private static final String DUMMY_CACHE_DIR = "Auto detected";
@@ -115,7 +116,7 @@ public class Settings implements Activity {
 		++currentRow;
 		
 		// authentication
-		JPanel authentication_panel = new JPanel(new GridLayout(2, 2));
+		CollapsibleJPanel authentication_panel = new CollapsibleJPanel(new GridLayout(2, 2));
 		authentication_panel.setBorder(BorderFactory.createTitledBorder("Authentication"));
 		
 		JLabel loginLabel = new JLabel("Username:");
@@ -141,7 +142,7 @@ public class Settings implements Activity {
 		parent.getContentPane().add(authentication_panel, constraints);
 		
 		// directory
-		JPanel directory_panel = new JPanel(new GridLayout(1, 3));
+		CollapsibleJPanel directory_panel = new CollapsibleJPanel(new GridLayout(1, 3));
 		directory_panel.setBorder(BorderFactory.createTitledBorder("Cache"));
 		JLabel cacheLabel = new JLabel("Working directory:");
 		directory_panel.add(cacheLabel);
@@ -175,7 +176,7 @@ public class Settings implements Activity {
 		// compute devices
 		GridBagLayout gridbag = new GridBagLayout();
 		GridBagConstraints compute_devices_constraints = new GridBagConstraints();
-		JPanel compute_devices_panel = new JPanel(gridbag);
+		CollapsibleJPanel compute_devices_panel = new CollapsibleJPanel(gridbag);
 		
 		compute_devices_panel.setBorder(BorderFactory.createTitledBorder("Compute devices"));
 		
@@ -320,7 +321,7 @@ public class Settings implements Activity {
 		parent.getContentPane().add(compute_devices_panel, constraints);
 		
 		// other
-		JPanel advanced_panel = new JPanel(new GridLayout(5, 2));
+		CollapsibleJPanel advanced_panel = new CollapsibleJPanel(new GridLayout(5, 2));
 		advanced_panel.setBorder(BorderFactory.createTitledBorder("Advanced options"));
 		
 		JLabel proxyLabel = new JLabel("Proxy:");
@@ -379,6 +380,7 @@ public class Settings implements Activity {
 		constraints.gridy = currentRow;
 		constraints.gridwidth = 2;
 		parent.getContentPane().add(advanced_panel, constraints);
+		advanced_panel.setCollapsed(true);
 		
 		// general settings
 		JPanel general_panel = new JPanel(new GridLayout(1, 2));

src/com/sheepit/client/standalone/swing/components/CollapsibleJPanel.java

@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2015 Laurent CLOUET
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package com.sheepit.client.standalone.swing.components;
+
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.LayoutManager;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseEvent;
+import javax.swing.BorderFactory;
+
+import javax.swing.JPanel;
+import javax.swing.border.Border;
+import javax.swing.border.TitledBorder;
+
+public class CollapsibleJPanel extends JPanel {
+	
+	private boolean isCompnentsVisible = true;
+	private int originalHeight;
+	private String borderTitle = "";
+	private int COLLAPSED_HEIGHT = 22;
+	private boolean[] originalVisibilty;
+	
+	public CollapsibleJPanel(LayoutManager layoutManager) {
+		setLayout(layoutManager);
+		addMouseListener(new onClickHandler());
+	}
+	
+	public void setCollapsed(boolean aFlag) {
+		if (aFlag) {
+			hideComponents();
+		}
+		else {
+			showComponents();
+		}
+	}
+	
+	public void toggleCollapsed() {
+		if (isCompnentsVisible) {
+			setCollapsed(true);
+		}
+		else {
+			setCollapsed(false);
+		}
+	}
+	
+	private void hideComponents() {
+		
+		Component[] components = getComponents();
+		
+		originalVisibilty = new boolean[components.length];
+		
+		// Hide all componens on panel
+		for (int i = 0; i < components.length; i++) {
+			originalVisibilty[i] = components[i].isVisible();
+			components[i].setVisible(false);
+		}
+		
+		setHeight(COLLAPSED_HEIGHT);
+		
+		// Add '+' char to end of border title
+		//setBorder(BorderFactory.createTitledBorder(BorderFactory.createEmptyBorder(), borderTitle + " + "));
+		setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), " + " + borderTitle));
+		
+		// Update flag
+		isCompnentsVisible = false;
+	}
+	
+	private void showComponents() {
+		
+		Component[] components = getComponents();
+		
+		// Set all components in panel to visible
+		for (int i = 0; i < components.length; i++) {
+			components[i].setVisible(originalVisibilty[i]);
+		}
+		
+		setHeight(originalHeight);
+		
+		// Add '-' char to end of border title
+		setBorder(BorderFactory.createTitledBorder(" - " + borderTitle));
+		
+		// Update flag
+		isCompnentsVisible = true;
+	}
+	
+	private void setHeight(int height) {
+		setPreferredSize(new Dimension(getPreferredSize().width, height));
+		setMinimumSize(new Dimension(getMinimumSize().width, height));
+		setMaximumSize(new Dimension(getMaximumSize().width, height));
+	}
+	
+	@Override
+	public Component add(Component component) { // Need this to get the original height of panel
+		
+		Component returnComponent = super.add(component);
+		
+		originalHeight = getPreferredSize().height;
+		
+		return returnComponent;
+	}
+	
+	@Override
+	public void setBorder(Border border) { // Need this to get the border title
+		
+		if (border instanceof TitledBorder && (borderTitle == "")) {
+			borderTitle = ((TitledBorder) border).getTitle();
+			
+			((TitledBorder) border).setTitle(" - " + borderTitle);
+		}
+		
+		super.setBorder(border);
+	}
+	
+	public class onClickHandler implements MouseListener {
+		
+		@Override
+		public void mouseClicked(MouseEvent e) {
+		}
+		
+		@Override
+		public void mousePressed(MouseEvent e) {
+			if (e.getPoint().y < COLLAPSED_HEIGHT) { // Only if click is on top of panel
+				((CollapsibleJPanel) e.getComponent()).toggleCollapsed();
+			}
+		}
+		
+		@Override
+		public void mouseEntered(MouseEvent e) {
+		}
+		
+		@Override
+		public void mouseExited(MouseEvent e) {
+		}
+		
+		@Override
+		public void mouseReleased(MouseEvent e) {
+		}
+		
+	}
+}