V0.1.0 Partial Commit

changed package and application names to differentiate from main PD
release

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

@@ -0,0 +1,149 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2014  Oleg Dolya
+ *
+ * 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.shatteredpixel.shatteredpixeldungeon.ui;
+
+import com.watabou.input.Touchscreen.Touch;
+import com.watabou.noosa.Camera;
+import com.watabou.noosa.TouchArea;
+import com.watabou.noosa.ui.Component;
+import com.shatteredpixel.shatteredpixeldungeon.scenes.PixelScene;
+import com.watabou.utils.Point;
+import com.watabou.utils.PointF;
+
+public class ScrollPane extends Component {
+			
+	protected TouchController controller;
+	protected Component content;
+	
+	protected float minX;
+	protected float minY;
+	protected float maxX;
+	protected float maxY;
+	
+	public ScrollPane( Component content ) {
+		super();
+		
+		this.content = content;
+		addToBack( content );
+		
+		width = content.width();
+		height = content.height();
+		
+		content.camera = new Camera( 0, 0, 1, 1, PixelScene.defaultZoom );
+		Camera.add( content.camera );
+	}
+	
+	@Override
+	public void destroy() {
+		super.destroy();
+		Camera.remove( content.camera );
+	}
+	
+	public void scrollTo( float x, float y ) {
+		content.camera.scroll.set( x, y );
+	}
+	
+	@Override
+	protected void createChildren() {
+		controller = new TouchController();
+		add( controller );
+	}
+	
+	@Override
+	protected void layout() {
+		
+		content.setPos( 0, 0 );
+		controller.x = x;
+		controller.y = y;
+		controller.width = width;
+		controller.height = height;
+		
+		Point p = camera().cameraToScreen( x, y );
+		Camera cs = content.camera;
+		cs.x = p.x;
+		cs.y = p.y;
+		cs.resize( (int)width, (int)height );
+	}
+	
+	public Component content() {
+		return content;
+	}
+	
+	public void onClick( float x, float y ) {		
+	}
+	
+	public class TouchController extends TouchArea {
+		
+		private float dragThreshold;
+		
+		public TouchController() {
+			super( 0, 0, 0, 0 );
+			dragThreshold = PixelScene.defaultZoom * 8;
+		}
+		
+		@Override
+		protected void onClick( Touch touch ) {
+			if (dragging) {
+				
+				dragging = false;
+				
+			} else {
+				
+				PointF p = content.camera.screenToCamera( (int)touch.current.x, (int)touch.current.y );
+				ScrollPane.this.onClick( p.x, p.y );
+
+			}
+		}	
+		
+		// true if dragging is in progress
+		private boolean dragging = false;
+		// last touch coords
+		private PointF lastPos = new PointF();
+		
+		@Override
+		protected void onDrag( Touch t ) {		
+			if (dragging) {
+				
+				Camera c = content.camera;
+				
+				c.scroll.offset( PointF.diff( lastPos, t.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;
+				}
+				
+				
+				lastPos.set( t.current );	
+				
+			} else if (PointF.distance( t.current, t.start ) > dragThreshold) {
+				
+				dragging = true;
+				lastPos.set( t.current );
+				
+			}
+		}	
+	}
+}