Add panel drag resize ctrl

source/Model/Layout.ts

@@ -10,12 +10,58 @@ class ILayout {
 	panles?: string[];
 	layout?: LayoutDirection;
 	scale?: number;
+	id?: number;
 }
 
-class Layout extends Emitter<{}> {
+interface ILayoutEvent {
+	layoutChange: Layout;
+	scaleChange: Layout;
+}
+
+class Layout extends Emitter<ILayoutEvent> {
+
+	private id: number = 0;
 
 	private data: ILayout = {};
 
+	private map(fn: (layout: ILayout) => boolean | void, layout?: ILayout) {
+		const currentLayout = layout ? layout : this.data;
+		if( fn(currentLayout) ) return;
+		if (currentLayout.items && currentLayout.items[0]) {
+			this.map(fn, currentLayout.items[0]);
+		}
+		if (currentLayout.items && currentLayout.items[1]) {
+			this.map(fn, currentLayout.items[1]);
+		}
+	}
+
+	public getData = (): ILayout => {
+		return this.data;
+	}
+
+	public setData = (data: ILayout) => {
+		this.data = data;
+		this.id = 0;
+		this.map((layout) => {
+			layout.id = this.id;
+			this.id ++;
+		});
+		this.emit("layoutChange", this);
+	}
+
+	public setScale = (id: number, scale: number) => {
+		let change = false;
+		this.map((layout) => {
+			if (layout.id === id) {
+				layout.scale = scale;
+				change = true;	
+			}
+			return change;
+		})
+		if (change) {
+			this.emit("scaleChange", this);
+		}
+	}
 };
 
 export { Layout, ILayout, LayoutDirection };