Add support for hiding/showing sidebar button

Draw hide/show sidebar button in top-right corner using Game's draw
hook. This will not work in Vanilla and so it is disabled in it.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/callback/Hooks.java

@@ -296,6 +296,9 @@ public class Hooks implements Callbacks
 
 		notifier.processFlash(graphics2d);
 
+		// Draw clientUI overlays
+		clientUi.paintOverlays(graphics2d);
+
 		// Stretch the game image if the user has that enabled
 		if (client.isStretchedEnabled())
 		{

runelite-client/src/main/java/net/runelite/client/ui/ClientUI.java

@@ -34,12 +34,14 @@ import java.awt.Container;
 import java.awt.Cursor;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.GraphicsConfiguration;
 import java.awt.LayoutManager;
 import java.awt.Rectangle;
 import java.awt.TrayIcon;
 import java.awt.event.InputEvent;
 import java.awt.event.KeyEvent;
+import java.awt.event.MouseEvent;
 import java.awt.image.BufferedImage;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
@@ -64,6 +66,8 @@ import net.runelite.api.Player;
 import net.runelite.api.Point;
 import net.runelite.api.events.ConfigChanged;
 import net.runelite.api.events.GameStateChanged;
+import net.runelite.api.widgets.Widget;
+import net.runelite.api.widgets.WidgetInfo;
 import net.runelite.client.RuneLite;
 import net.runelite.client.RuneLiteProperties;
 import net.runelite.client.callback.ClientThread;
@@ -75,6 +79,9 @@ import net.runelite.client.config.WarningOnExit;
 import net.runelite.client.events.NavigationButtonAdded;
 import net.runelite.client.events.NavigationButtonRemoved;
 import net.runelite.client.input.KeyManager;
+import net.runelite.client.input.MouseAdapter;
+import net.runelite.client.input.MouseListener;
+import net.runelite.client.input.MouseManager;
 import net.runelite.client.ui.skin.SubstanceRuneLiteLookAndFeel;
 import net.runelite.client.util.HotkeyListener;
 import net.runelite.client.util.ImageUtil;
@@ -114,10 +121,12 @@ public class ClientUI
 	private final RuneLiteProperties properties;
 	private final RuneLiteConfig config;
 	private final KeyManager keyManager;
+	private final MouseManager mouseManager;
 	private final Applet client;
 	private final ConfigManager configManager;
 	private final Provider<ClientThread> clientThreadProvider;
 	private final CardLayout cardLayout = new CardLayout();
+	private final Rectangle sidebarButtonPosition = new Rectangle();
 	private ContainableFrame frame;
 	private JPanel navContainer;
 	private PluginPanel pluginPanel;
@@ -136,6 +145,7 @@ public class ClientUI
 		RuneLiteProperties properties,
 		RuneLiteConfig config,
 		KeyManager keyManager,
+		MouseManager mouseManager,
 		@Nullable Applet client,
 		ConfigManager configManager,
 		Provider<ClientThread> clientThreadProvider)
@@ -143,6 +153,7 @@ public class ClientUI
 		this.properties = properties;
 		this.config = config;
 		this.keyManager = keyManager;
+		this.mouseManager = mouseManager;
 		this.client = client;
 		this.configManager = configManager;
 		this.clientThreadProvider = clientThreadProvider;
@@ -352,6 +363,24 @@ public class ClientUI
 
 			keyManager.registerKeyListener(sidebarListener);
 
+			// Add mouse listener
+			final MouseListener mouseListener = new MouseAdapter()
+			{
+				@Override
+				public MouseEvent mousePressed(MouseEvent mouseEvent)
+				{
+					if (SwingUtilities.isLeftMouseButton(mouseEvent) && sidebarButtonPosition.contains(mouseEvent.getPoint()))
+					{
+						SwingUtilities.invokeLater(ClientUI.this::toggleSidebar);
+						mouseEvent.consume();
+					}
+
+					return mouseEvent;
+				}
+			};
+
+			mouseManager.registerMouseListener(mouseListener);
+
 			// Decorate window with custom chrome and titlebar if needed
 			final boolean withTitleBar = config.enableCustomChrome();
 			frame.setUndecorated(withTitleBar);
@@ -583,12 +612,39 @@ public class ClientUI
 		return new Point(0, 0);
 	}
 
+	/**
+	 * Paint UI related overlays to target graphics
+	 * @param graphics target graphics
+	 */
+	public void paintOverlays(final Graphics2D graphics)
+	{
+		if (!(client instanceof Client) || config.enableCustomChrome())
+		{
+			return;
+		}
+
+		final Client client = (Client)this.client;
+		final int x = client.getRealDimensions().width - SIDEBAR_OPEN.getWidth() - 5;
+
+		// Offset sidebar button if resizable mode logout is visible
+		final Widget logoutButton = client.getWidget(WidgetInfo.RESIZABLE_VIEWPORT_BOTTOM_LINE_LOGOUT_BUTTON);
+		final int y = logoutButton != null && !logoutButton.isHidden() && logoutButton.getParent() != null
+			? logoutButton.getHeight() + logoutButton.getRelativeY() + 5
+			: 5;
+
+		final BufferedImage image = sidebarOpen ? SIDEBAR_OPEN : SIDEBAR_CLOSE;
+		graphics.drawImage(image, x, y, null);
+
+		// Update button dimensions
+		sidebarButtonPosition.setBounds(x, y, image.getWidth(), image.getHeight());
+	}
+
 	public GraphicsConfiguration getGraphicsConfiguration()
 	{
 		return frame.getGraphicsConfiguration();
 	}
 
-	void toggleSidebar()
+	private void toggleSidebar()
 	{
 		// Toggle sidebar open
 		boolean isSidebarOpen = sidebarOpen;