v0.7.5e: added scroll wheel support

SPD-classes/src/main/java/com/watabou/input/InputHandler.java

@@ -23,12 +23,14 @@ package com.watabou.input;
 
 import com.badlogic.gdx.InputAdapter;
 import com.watabou.noosa.Game;
+import com.watabou.utils.PointF;
 
 public class InputHandler extends InputAdapter {
 	
 	public void processAllEvents(){
 		PointerEvent.processPointerEvents();
 		KeyEvent.processKeyEvents();
+		ScrollEvent.processScrollEvents();
 	}
 	
 	// *********************
@@ -59,6 +61,18 @@ public class InputHandler extends InputAdapter {
 		return true;
 	}
 	
+	//TODO tracking this should probably be in PointerEvent
+	private static PointF pointerHoverPos = new PointF();
+	
+	@Override
+	public boolean mouseMoved(int screenX, int screenY) {
+		screenX /= (Game.dispWidth / (float)Game.width);
+		screenY /= (Game.dispHeight / (float)Game.height);
+		pointerHoverPos.x = screenX;
+		pointerHoverPos.y = screenY;
+		return true;
+	}
+	
 	// *****************
 	// *** Key Input ***
 	// *****************
@@ -85,4 +99,13 @@ public class InputHandler extends InputAdapter {
 		return true;
 	}
 	
+	// ********************
+	// *** Scroll Input ***
+	// ********************
+	
+	@Override
+	public boolean scrolled(int amount) {
+		ScrollEvent.addScrollEvent( new ScrollEvent(pointerHoverPos, amount));
+		return true;
+	}
 }

SPD-classes/src/main/java/com/watabou/input/ScrollEvent.java

@@ -0,0 +1,71 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2019 Evan Debenham
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>
+ */
+
+package com.watabou.input;
+
+import com.watabou.utils.PointF;
+import com.watabou.utils.Signal;
+
+import java.util.ArrayList;
+
+public class ScrollEvent {
+	
+	public PointF pos;
+	public int amount;
+	
+	public ScrollEvent(PointF mousePos, int amount){
+		this.amount = amount;
+		this.pos = mousePos;
+	}
+	
+	// **********************
+	// *** Static members ***
+	// **********************
+	
+	private static Signal<ScrollEvent> scrollSignal = new Signal<>( true );
+	
+	public static void addScrollListener( Signal.Listener<ScrollEvent> listener ){
+		scrollSignal.add(listener);
+	}
+	
+	public static void removeScrollListener( Signal.Listener<ScrollEvent> listener ){
+		scrollSignal.remove(listener);
+	}
+	
+	public static void clearListeners(){
+		scrollSignal.removeAll();
+	}
+	
+	//Accumulated key events
+	private static ArrayList<ScrollEvent> scrollEvents = new ArrayList<>();
+	
+	public static synchronized void addScrollEvent( ScrollEvent event ){
+		scrollEvents.add( event );
+	}
+	
+	public static synchronized void processScrollEvents(){
+		for (ScrollEvent k : scrollEvents){
+			scrollSignal.dispatch(k);
+		}
+		scrollEvents.clear();
+	}
+	
+}

SPD-classes/src/main/java/com/watabou/noosa/PointerArea.java

@@ -34,14 +34,14 @@ public class PointerArea extends Visual implements Signal.Listener<PointerEvent>
 	//if true, this PointerArea will always block input, even when it is inactive
 	public boolean blockWhenInactive = false;
 	
-	public PointerArea(Visual target ) {
+	public PointerArea( Visual target ) {
 		super( 0, 0, 0, 0 );
 		this.target = target;
 		
 		PointerEvent.addPointerListener( this );
 	}
 	
-	public PointerArea(float x, float y, float width, float height ) {
+	public PointerArea( float x, float y, float width, float height ) {
 		super( x, y, width, height );
 		this.target = this;
 		
@@ -99,17 +99,13 @@ public class PointerArea extends Visual implements Signal.Listener<PointerEvent>
 		}
 	}
 	
-	protected void onPointerDown( PointerEvent event ) {
-	}
+	protected void onPointerDown( PointerEvent event ) { }
 	
-	protected void onPointerUp( PointerEvent event) {
-	}
+	protected void onPointerUp( PointerEvent event) { }
 	
-	protected void onClick( PointerEvent event ) {
-	}
+	protected void onClick( PointerEvent event ) { }
 	
-	protected void onDrag( PointerEvent event ) {
-	}
+	protected void onDrag( PointerEvent event ) { }
 	
 	public void reset() {
 		curEvent = null;

SPD-classes/src/main/java/com/watabou/noosa/ScrollArea.java

@@ -0,0 +1,58 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2019 Evan Debenham
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>
+ */
+
+package com.watabou.noosa;
+
+import com.watabou.input.ScrollEvent;
+import com.watabou.utils.Signal;
+
+//pointer area with additional support for detecting scrolling events
+public class ScrollArea extends PointerArea {
+	
+	public ScrollArea( Visual target ){
+		super( target );
+		ScrollEvent.addScrollListener( scrollListener );
+	}
+	
+	public ScrollArea(float x, float y, float width, float height ) {
+		super( x, y, width, height );
+		ScrollEvent.addScrollListener( scrollListener );
+	}
+	
+	private Signal.Listener<ScrollEvent> scrollListener = new Signal.Listener<ScrollEvent>() {
+		@Override
+		public boolean onSignal(ScrollEvent event) {
+			if (event != null && target.overlapsScreenPoint( (int)event.pos.x, (int)event.pos.y )){
+				onScroll( event );
+				return true;
+			}
+			return false;
+		}
+	};
+	
+	protected void onScroll( ScrollEvent event ){ }
+	
+	@Override
+	public void destroy() {
+		super.destroy();
+		ScrollEvent.removeScrollListener( scrollListener );
+	}
+}

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/CellSelector.java

@@ -29,12 +29,13 @@ import com.shatteredpixel.shatteredpixeldungeon.actors.mobs.Mob;
 import com.shatteredpixel.shatteredpixeldungeon.items.Heap;
 import com.shatteredpixel.shatteredpixeldungeon.tiles.DungeonTilemap;
 import com.watabou.input.PointerEvent;
+import com.watabou.input.ScrollEvent;
 import com.watabou.noosa.Camera;
-import com.watabou.noosa.PointerArea;
+import com.watabou.noosa.ScrollArea;
 import com.watabou.utils.GameMath;
 import com.watabou.utils.PointF;
 
-public class CellSelector extends PointerArea {
+public class CellSelector extends ScrollArea {
 
 	public Listener listener = null;
 	
@@ -47,6 +48,22 @@ public class CellSelector extends PointerArea {
 		camera = map.camera();
 		
 		dragThreshold = PixelScene.defaultZoom * DungeonTilemap.SIZE / 2;
+		
+		mouseZoom = camera.zoom;
+	}
+	
+	private float mouseZoom;
+	
+	@Override
+	protected void onScroll( ScrollEvent event ) {
+		float diff = event.amount/10f;
+		
+		//scale zoom difference so zooming is consistent
+		diff /= ((camera.zoom+1)/camera.zoom)-1;
+		diff = Math.min(1, diff);
+		mouseZoom = GameMath.gate( PixelScene.minZoom, mouseZoom - diff, PixelScene.maxZoom );
+		
+		zoom( (int)Math.floor(mouseZoom) );
 	}
 	
 	@Override

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ui/ScrollPane.java

@@ -23,9 +23,10 @@ package com.shatteredpixel.shatteredpixeldungeon.ui;
 
 import com.shatteredpixel.shatteredpixeldungeon.scenes.PixelScene;
 import com.watabou.input.PointerEvent;
+import com.watabou.input.ScrollEvent;
 import com.watabou.noosa.Camera;
 import com.watabou.noosa.ColorBlock;
-import com.watabou.noosa.PointerArea;
+import com.watabou.noosa.ScrollArea;
 import com.watabou.noosa.ui.Component;
 import com.watabou.utils.Point;
 import com.watabou.utils.PointF;
@@ -39,11 +40,6 @@ public class ScrollPane extends Component {
 	protected Component content;
 	protected ColorBlock thumb;
 
-	protected float minX;
-	protected float minY;
-	protected float maxX;
-	protected float maxY;
-
 	public ScrollPane( Component content ) {
 		super();
 
@@ -107,7 +103,7 @@ public class ScrollPane extends Component {
 	public void onClick( float x, float y ) {
 	}
 
-	public class PointerController extends PointerArea {
+	public class PointerController extends ScrollArea {
 
 		private float dragThreshold;
 
@@ -115,6 +111,14 @@ public class ScrollPane extends Component {
 			super( 0, 0, 0, 0 );
 			dragThreshold = PixelScene.defaultZoom * 8;
 		}
+		
+		@Override
+		protected void onScroll(ScrollEvent event) {
+			PointF newPt = new PointF(lastPos);
+			newPt.y -= event.amount * content.camera.zoom * 10;
+			scroll(newPt);
+			dragging = false;
+		}
 
 		@Override
 		protected void onPointerUp( PointerEvent event ) {
@@ -138,25 +142,7 @@ public class ScrollPane extends Component {
 		protected void onDrag( PointerEvent event ) {
 			if (dragging) {
 
-				Camera c = content.camera;
-
-				c.shift( PointF.diff( lastPos, event.current ).invScale( c.zoom ) );
-				if (c.scroll.x + width > content.width()) {
-					c.scroll.x = content.width() - width;
-				}
-				if (c.scroll.x < 0) {
-					c.scroll.x = 0;
-				}
-				if (c.scroll.y + height > content.height()) {
-					c.scroll.y = content.height() - height;
-				}
-				if (c.scroll.y < 0) {
-					c.scroll.y = 0;
-				}
-
-				thumb.y = y + height * c.scroll.y / content.height();
-
-				lastPos.set( event.current );
+				scroll(event.current);
 
 			} else if (PointF.distance( event.current, event.start ) > dragThreshold) {
 
@@ -166,5 +152,30 @@ public class ScrollPane extends Component {
 
 			}
 		}
+		
+		private void scroll( PointF current ){
+			
+			Camera c = content.camera;
+			
+			c.shift( PointF.diff( lastPos, current ).invScale( c.zoom ) );
+			if (c.scroll.x + width > content.width()) {
+				c.scroll.x = content.width() - width;
+			}
+			if (c.scroll.x < 0) {
+				c.scroll.x = 0;
+			}
+			if (c.scroll.y + height > content.height()) {
+				c.scroll.y = content.height() - height;
+			}
+			if (c.scroll.y < 0) {
+				c.scroll.y = 0;
+			}
+			
+			thumb.y = y + height * c.scroll.y / content.height();
+			
+			lastPos.set( current );
+			
+		}
+		
 	}
 }