StateMachine Proposal

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-over/trunk@10 174cde9d-5d70-4d2a-aa98-46368bc2aaf7

1 files changed, 150 insertions, 0 deletions

diff --git a/pdf-over/pdf-gui/src/main/java/at/asit/pdfover/gui/workflow/Workflow.java b/pdf-over/pdf-gui/src/main/java/at/asit/pdfover/gui/workflow/Workflow.java
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+++ b/pdf-over/pdf-gui/src/main/java/at/asit/pdfover/gui/workflow/Workflow.java
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+package at.asit.pdfover.gui.workflow;
+
+import java.util.Properties;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+
+public class Workflow {
+	/**
+	 * @uml.property name="state"
+	 * @uml.associationEnd multiplicity="(1 1)" aggregation="shared"
+	 *                     inverse="workflow1:at.asit.pdfover.gui.workflow.WorkflowState"
+	 */
+	private WorkflowState state = new at.asit.pdfover.gui.workflow.states.PrepareConfigurationState();
+
+	/**
+	 * Getter of the property <tt>state</tt>
+	 * 
+	 * @return Returns the state.
+	 * @uml.property name="state"
+	 */
+	public WorkflowState getState() {
+		return state;
+	}
+
+	private String[] CmdArgs = new String[] {};
+
+	/**
+	 * Sets the Cmd Arguments
+	 * 
+	 * @param args
+	 */
+	public void SetCmdArgs(String[] args) {
+		this.CmdArgs = args;
+	}
+
+	/**
+	 * Gets the Cmd Arguments
+	 * 
+	 * @return
+	 */
+	public String[] GetCmdArgs() {
+		return this.CmdArgs;
+	}
+
+	private Properties persistent_state = new Properties();
+
+	/**
+	 * Gets the Persistent State
+	 * 
+	 * @return
+	 */
+	public Properties GetPersistentState() {
+		return this.persistent_state;
+	}
+
+	/**
+	 * Update Workflow logic and let state machine do its job...
+	 */
+	public void Update() {
+		WorkflowState next = null;
+		do {
+			this.state.Update(this);
+			next = this.state.NextState();
+		} while (next != null);
+	}
+
+	private Display display = null;
+	
+	private Shell shell = null;
+	
+	private Composite container = null;
+	
+	private void CreateMainWindow() {
+		//TODO: Instanciate Main Window Class
+		this.display = Display.getDefault();
+		shell = new Shell();
+		shell.setSize(608, 340);
+		shell.setText("PDFOver 4.0!! :)");
+		
+		container = new Composite(shell, SWT.NONE);
+		container.setBounds(20, 44, 572, 257);
+		
+		shell.open();
+        shell.layout();
+	}
+	
+	/**
+	 * Gets the Shell for drawing the ui
+	 * 
+	 * @return
+	 */
+	public Composite GetComposite() {
+		// TODO: implement
+		// Main window will be build on first call
+		// returns SWT Composite container for states to draw their GUI
+		
+		if(this.container == null) {
+			this.CreateMainWindow();
+		}
+		
+		if(this.container == null) {
+			// TODO throw Exception...
+		}
+		
+		return this.container;
+	}
+
+	/**
+	 * Only returns a shell if one was already created ...
+	 * 
+	 * @return
+	 */
+	private Shell NonCreatingGetShell() {
+		return this.shell;
+	}
+
+	/**
+	 * Only returns a shell if one was already created ...
+	 * 
+	 * @return
+	 */
+	private Display NonCreatingGetDisplay() {
+		return this.display;
+	}
+
+	/**
+	 * Workflow main entrance point
+	 */
+	public void Start() {
+		// Call update to start processing ...
+		this.Update();
+
+		// if a user interaction is required we have a shell ...
+		Shell shell = this.NonCreatingGetShell();
+		Display display = this.NonCreatingGetDisplay();
+
+		if (shell != null && display != null) {
+			while (!shell.isDisposed()) {
+				if (!display.readAndDispatch()) {
+					display.sleep();
+				}
+			}
+			display.dispose();
+		}		
+	}
+
+}