Visual resizing

hi guy.

there is three step you must follow.

1.

the Container Activity Designer of the activity you want to resize must inherited from FreeformActivityDesigner and override the bool CanResizeContainedDesigner property to return true .

2. you must override bool EnableVisualResizing property of the activities you will visualresizing.

3. protected override Size OnLayoutSize(ActivityDesignerLayoutEventArgs e)
{
return base.Size;
}

Matt.

MattLin at 2007-8-30 >

hi.

the BPDesigner dose not need to be inherited from the FreeformActivityDesigner .

but the Designer of the container activity that contains WorkProcessStep Activity must Inherited from FreeformActivityDesigner.

because ,it the child activity be resize ,the parent activity's designer layout will be change. the FreeformActivityDesigner provider this funtion.

MattLin at 2007-8-30 >

hi.

yes. in the FreeformDesigner. the child Activities can be move anywhere inside the FreeformDesigner bounds.

but if you will resize the activity , this function wounld be needed.

now ,you can use dragdrop mouse action to connect activities each other.

capture a source activity's connection point and drag to a target activity's connection point.

do this , a connector will be create by RootDesigner (at this time ,it is the FreeformDesigner) . you can override the FreeformActivityDesigner's CreateConnector virtual method to provide your custom connector if you wanted. but ,you do not need to do it. it default CreateConnector implemation work charmingly.

the finally step is very important .

you can override the child Activity's Designer (BPDesigner etc) OnConnected method to listen this connected event.

OnConnected has two parameters , source and target ,both are ConnectionPoint type.

then add a Activity type property named like "NextActivity" to WorkProcessStep.

for example

protected override void OnConnected(ConnectionPoint source, ConnectionPoint target)
{
base.OnConnected(source, target);
if (this == source.AssociatedDesigner)
{
Action _action = (Action)this.Activity;
_action.NextActivity = target.AssociatedDesigner.Activity;
//_action.NextActivityName = target.AssociatedDesigner.Activity.QualifiedName;
}
}

by the way ,maybe you also need two custom activities ,"StartWorkStep" end "EndWorkStep" .like UML Activity Diagram

Matt.

MattLin at 2007-8-30 >

hi guy,

if you do above .

the workflow does not run in the order as same as the SequenceWorkflow does.

there is a little more thing you must finish.

you would override the Execute method of every CompositeActivity that can contains the WorkProcessStep.

and , there will be only one entry activity maybe named "WorkProcessStepStartActity" and some end Activity like "WorkProcessStepEnd". and ,do below step.

1. the Composite Activity must implemation IActivityEventListener<ActivityExecutionStatusChangedEventArgs> interface to listen the Statuschange Event of Child Activity help to Schedule Activity Execution.

2. override the CompositeActivity Execute method.

like sample code below

public class MyWorkFlow : CompositeActivity , IActivityEventListener<ActivityExecutionStatusChangedEventArgs>

{

protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
Activity _StartExecute = this.StartChildActivity;

StartExecute .RegisterForStatusChange(Activity.ClosedEvent,this);

executionContext.ExecuteActivity( StartExecute ); // async invoke here

return ActivityExecutionStatus.Executing;
}

public void IActivityEventListener<ActivityExecutionStatusChangedEventArgs>.OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e) { ActivityExecutionContext context1 = sender as ActivityExecutionContext; if(e.Activity is EndActivity) { this.OnSequenceComplete(context1); context1.CloseActivity(); } else { Activity _Activity = ((WorkProcessStep)e.Activity).NextActivity; _Activity.RegisterForStatusChange(Activity.ClosedEvent,this); context1.ExecuteActivity( _Activity); // async invoke here } }

}

by the way , that just be demo .maybe some more control will be added .

i hope these would give you some idea.

Matt.

MattLin at 2007-8-30 >

Hi guy.

because the WorkflowSurface has a task to Schedule child activity execution , it is not same to SequenceActivity that start by Activities[0]. as the WorkflowSurface allow child activity to be drag-drop anywhere,so it is important that the WorkflowSurface contains a special Activity that point it a workstep starter. and the workstep ender is also very necessary.

so , you maybe need to implement StartChildActivity and EndActivity

the 'OnSequenceComplete' method is a new method you need to add to WorkflowSurface class,

maybe, more suitable name can be "OnWorkflowSurfaceComplete",it 's not necessary..:) ( i am sorry for this puzzle)

protected void virtual OnWorkflowSurfaceComplete(ActivityExecutionContext executionContext)

{

/// can be override .

}

Matt./

MattLin at 2007-8-30 >

hi.

see http://wf.netfx3.com/files/folders/activity_behavior/entry840.aspx

the sample maybe give you some ideat how to let workflow run in the correct order.

Matt

MattLin at 2007-8-30 >