From a87d15c980a1ede652c0c21fbeaa1feb626c0830 Mon Sep 17 00:00:00 2001
From: Harald Wolff <haraldwolff@hwo-devel.drbender.lupus>
Date: Thu, 15 Sep 2016 10:30:09 +0200
Subject: [PATCH] WindowStateManager

---
 src/org/hwo/ui/states/IWindowState.java       |  10 ++
 src/org/hwo/ui/states/WindowStateManager.java | 163 ++++++++++++++++++
 2 files changed, 173 insertions(+)
 create mode 100644 src/org/hwo/ui/states/IWindowState.java
 create mode 100644 src/org/hwo/ui/states/WindowStateManager.java

diff --git a/src/org/hwo/ui/states/IWindowState.java b/src/org/hwo/ui/states/IWindowState.java
new file mode 100644
index 0000000..da4bbee
--- /dev/null
+++ b/src/org/hwo/ui/states/IWindowState.java
@@ -0,0 +1,10 @@
+package org.hwo.ui.states;
+
+import java.util.Properties;
+
+public interface IWindowState {
+
+	void		getWindowState(Properties properties);
+	void		setWindowState(Properties properties);
+	
+}
diff --git a/src/org/hwo/ui/states/WindowStateManager.java b/src/org/hwo/ui/states/WindowStateManager.java
new file mode 100644
index 0000000..122e301
--- /dev/null
+++ b/src/org/hwo/ui/states/WindowStateManager.java
@@ -0,0 +1,163 @@
+package org.hwo.ui.states;
+
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Point;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+
+public class WindowStateManager {
+	
+	
+	public String saveState(Component component){
+		WindowState ws = createWindowState(component);
+		ByteArrayOutputStream os = new ByteArrayOutputStream();
+		
+		try {
+			ws.properties.storeToXML(os, "WindowState");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		
+		return new String(os.toByteArray());
+	}
+	
+	public void applyState(Component c,String state){
+		WindowState ws = createWindowState(state);
+		applyState(c,ws);
+	}
+	
+	private void applyState(Component c,WindowState ws){
+		
+		if (ws.dimension != null){
+			c.setSize(ws.dimension);
+		}
+		if (ws.location != null){
+			c.setLocation(ws.location);
+		}
+		
+		if (IWindowState.class.isInstance(c)){
+			IWindowState iws = (IWindowState)c;
+			iws.setWindowState(ws.properties);
+		}
+	}
+	
+	public Component createComponent(String state){
+		return createComponent( createWindowState(state));
+	}
+	
+	private WindowState createWindowState(String state){
+		ByteArrayInputStream is = new ByteArrayInputStream(state.getBytes());
+		Properties properties = new Properties();
+
+		try {
+			properties.loadFromXML(is);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		
+		return new WindowState(properties);
+	}
+	
+	private WindowState createWindowState(Component c){
+		WindowState ws = new WindowState();
+		
+		ws.setClazz(c.getClass());
+		ws.setLocation(c.getLocation());
+		ws.setDimension(c.getSize());
+		
+		if (IWindowState.class.isInstance(c)){
+			IWindowState iws = (IWindowState)c;
+			iws.getWindowState(ws.properties);
+		}
+		
+		return ws;
+	}
+	
+	private WindowState createWindowState(Properties properties){
+		return new WindowState(properties);
+	}
+	
+	private Component createComponent(WindowState ws){
+		Component c = null;
+		
+		try {
+			c = (Component) ws.clazz.newInstance();
+			
+		} catch (InstantiationException e) {
+			e.printStackTrace();
+		} catch (IllegalAccessException e) {
+			e.printStackTrace();
+		}
+		
+		return c;
+	}
+	
+	
+	
+	class WindowState {
+
+		Class<?>	clazz;
+		Point		location;
+		Dimension 	dimension;
+		
+		Properties	properties;
+		
+		
+		public WindowState(){
+			this.properties = new Properties();
+		}
+		public WindowState(Properties properties){
+			this.properties = properties;
+			
+			if (properties.containsKey("WindowState.clazz")){
+				try {
+					this.clazz = this.getClass().getClassLoader().loadClass(properties.getProperty("WindowState.clazz"));
+				} catch (ClassNotFoundException e) {
+					e.printStackTrace();
+				}
+			}
+			
+			if (properties.containsKey("WindowState.dimension.width") && properties.containsKey("WindowState.dimension.height")){
+				this.dimension = new Dimension();
+				this.dimension.setSize( Double.parseDouble( this.properties.getProperty("WindowState.dimension.width") ), Double.parseDouble( this.properties.getProperty("WindowState.dimension.height") ));
+			}
+
+			if (properties.containsKey("WindowState.location.x") && properties.containsKey("WindowState.location.y")){
+				this.location = new Point();
+				this.location.setLocation( Double.parseDouble( this.properties.getProperty("WindowState.location.x") ), Double.parseDouble( this.properties.getProperty("WindowState.location.y") ));
+			}
+		}
+		
+		public Class<?> getClazz() {
+			return clazz;
+		}
+		public void setClazz(Class<?> clazz) {
+			this.clazz = clazz;
+			
+			this.properties.setProperty("WindowState.clazz", clazz.getCanonicalName());
+		}
+		public Dimension getDimension() {
+			return dimension;
+		}
+		public void setDimension(Dimension dimension) {
+			this.dimension = dimension;
+
+			this.properties.setProperty("WindowState.dimension.width", Double.toString(dimension.getWidth()) );
+			this.properties.setProperty("WindowState.dimension.height", Double.toString(dimension.getHeight()) );
+		}
+		public Point getLocation() {
+			return location;
+		}
+		public void setLocation(Point location) {
+			this.location = location;
+			this.properties.setProperty("WindowState.location.x", Double.toString(location.getX()) );
+			this.properties.setProperty("WindowState.location.y", Double.toString(location.getY()) );
+		}
+		
+		
+	}
+	
+}