cannon plugin: add overlay for cannonballs left

runelite-client/src/main/java/net/runelite/client/plugins/cannon/CannonConfig.java

@@ -44,4 +44,14 @@ public interface CannonConfig extends Config
 	{
 		return true;
 	}
+
+	@ConfigItem(
+		keyName = "showOverlay",
+		name = "Show the cannonballs left overlay",
+		description = "Configures whether to show the cannonballs in an overlay"
+	)
+	default boolean showAmountOnScreen()
+	{
+		return false;
+	}
 }

runelite-client/src/main/java/net/runelite/client/plugins/cannon/CannonPlugin.java

@@ -27,6 +27,8 @@ package net.runelite.client.plugins.cannon;
 import com.google.common.eventbus.Subscribe;
 import com.google.inject.Provides;
 import java.awt.Color;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import javax.inject.Inject;
@@ -76,6 +78,9 @@ public class CannonPlugin extends Plugin
 	@Inject
 	private CannonOverlay cannonOverlay;
 
+	@Inject
+	private CannonUiOverlay cannonUiOverlay;
+
 	@Inject
 	private CannonConfig config;
 
@@ -89,9 +94,9 @@ public class CannonPlugin extends Plugin
 	}
 
 	@Override
-	public Overlay getOverlay()
+	public Collection<Overlay> getOverlays()
 	{
-		return cannonOverlay;
+		return Arrays.asList(cannonOverlay, cannonUiOverlay);
 	}
 
 	@Override

runelite-client/src/main/java/net/runelite/client/plugins/cannon/CannonUiOverlay.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2018, Adam <Adam@sigterm.info>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.client.plugins.cannon;
+
+import java.awt.Dimension;
+import java.awt.Graphics2D;
+import java.awt.Point;
+import javax.inject.Inject;
+import net.runelite.client.ui.overlay.Overlay;
+import net.runelite.client.ui.overlay.OverlayPosition;
+import net.runelite.client.ui.overlay.components.PanelComponent;
+
+class CannonUiOverlay extends Overlay
+{
+	private static final int COMPONENT_WIDTH = 40;
+	
+	private final CannonConfig config;
+	private final CannonPlugin plugin;
+	private final PanelComponent panelComponent = new PanelComponent();
+
+	@Inject
+	CannonUiOverlay(CannonConfig config, CannonPlugin plugin)
+	{
+		setPosition(OverlayPosition.ABOVE_CHATBOX_RIGHT);
+		this.config = config;
+		this.plugin = plugin;
+	}
+
+	@Override
+	public Dimension render(Graphics2D graphics, Point parent)
+	{
+		if (!plugin.isCannonPlaced() || plugin.getCannonPosition() == null)
+		{
+			return null;
+		}
+
+		if (!config.showAmountOnScreen())
+		{
+			return null;
+		}
+
+		panelComponent.setTitleColor(plugin.getStateColor());
+		panelComponent.setTitle(String.valueOf(plugin.getCballsLeft()));
+		panelComponent.setWidth(COMPONENT_WIDTH);
+
+		return panelComponent.render(graphics, parent);
+	}
+}