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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Workflow.ComponentModel.Design
{
using System;
using System.Collections.Generic;
using System.Text;
using System.Workflow.ComponentModel.Design;
using System.ComponentModel.Design;
using System.Drawing;
using System.ServiceModel;
// <summary>
// Helper class for visuaulizing the highlighted activity group
// </summary>
class ActivityDesignerHighlighter : IServiceProvider
{
private IDesignerGlyphProviderService glyphProviderService;
private HighlightGlyphProvider highlightProvider = null;
private ActivityDesigner owner;
private WorkflowView workflowView;
public ActivityDesignerHighlighter(ActivityDesigner owner)
{
this.owner = owner;
}
public object GetService(Type serviceType)
{
if (serviceType == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceType");
}
if (owner.Activity != null && owner.Activity.Site != null)
{
return owner.Activity.Site.GetService(serviceType);
}
else
{
return null;
}
}
public void Highlight(List<ActivityDesigner> highlightedDesigners)
{
if (highlightedDesigners == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("hightlightedDesigners");
}
glyphProviderService = this.GetService(typeof(IDesignerGlyphProviderService)) as IDesignerGlyphProviderService;
workflowView = GetService(typeof(WorkflowView)) as WorkflowView;
RemoveCurrentHighlight();
IDesignerHost designerHost = this.GetService(typeof(IDesignerHost)) as IDesignerHost;
DesignerHighlighterMesageFilter messageFilter = new DesignerHighlighterMesageFilter();
highlightProvider = new HighlightGlyphProvider(designerHost.GetDesigner(designerHost.RootComponent) as ActivityDesigner, highlightedDesigners);
glyphProviderService.AddGlyphProvider(highlightProvider);
highlightProvider.MessageFilter = messageFilter;
messageFilter.MouseDown += new EventHandler<System.Windows.Forms.MouseEventArgs>(messageFilter_MouseDown);
messageFilter.KeyDown += new EventHandler<System.Windows.Forms.KeyEventArgs>(messageFilter_KeyDown);
workflowView.AddDesignerMessageFilter(messageFilter);
workflowView.FitToScreenSize();
}
public void RemoveCurrentHighlight()
{
HighlightGlyphProvider currentHightlightGlyhProvider = null;
foreach (IDesignerGlyphProvider glyphProvider in glyphProviderService.GlyphProviders)
{
if (glyphProvider is HighlightGlyphProvider)
{
currentHightlightGlyhProvider = (HighlightGlyphProvider) glyphProvider;
break;
}
}
if (currentHightlightGlyhProvider != null)
{
//remove associated designerMessageFilter before removing currentGlyphProvider.
workflowView.RemoveDesignerMessageFilter(currentHightlightGlyhProvider.MessageFilter);
glyphProviderService.RemoveGlyphProvider(currentHightlightGlyhProvider);
}
}
void messageFilter_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
glyphProviderService.RemoveGlyphProvider(highlightProvider);
if (workflowView != null)
{
workflowView.RemoveDesignerMessageFilter(sender as WorkflowDesignerMessageFilter);
Point scrollPosition = workflowView.ClientPointToLogical(owner.Location);
workflowView.FitToWorkflowSize();
// try to center the owner designer int the the workflowview
Size viewSize = workflowView.ClientSizeToLogical(workflowView.ViewPortSize);
if (scrollPosition.Y > viewSize.Height / 2)
{
scrollPosition.Y -= viewSize.Height / 2;
}
if (scrollPosition.X > viewSize.Width / 2)
{
scrollPosition.X -= viewSize.Width / 2;
}
workflowView.ScrollPosition = scrollPosition;
}
}
void messageFilter_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
glyphProviderService.RemoveGlyphProvider(highlightProvider);
if (workflowView != null)
{
workflowView.RemoveDesignerMessageFilter(sender as WorkflowDesignerMessageFilter);
Point scrollPosition = workflowView.ClientPointToLogical(e.Location);
workflowView.FitToWorkflowSize();
// try to center the clicked portion of the workflow in the workflowview
Size viewSize = workflowView.ClientSizeToLogical(workflowView.ViewPortSize);
if (scrollPosition.Y > viewSize.Height / 2)
{
scrollPosition.Y -= viewSize.Height / 2;
}
if (scrollPosition.X > viewSize.Width / 2)
{
scrollPosition.X -= viewSize.Width / 2;
}
workflowView.ScrollPosition = scrollPosition;
}
}
// this is the message filter inserted in the workflowview to escape back to the normal view
// from the highlighted view. since glyphs cant take mouse events, this is the only way to
// detect mouseclicks when in highlighted view.
internal sealed class DesignerHighlighterMesageFilter : WorkflowDesignerMessageFilter
{
public event EventHandler<System.Windows.Forms.KeyEventArgs> KeyDown;
public event EventHandler<System.Windows.Forms.MouseEventArgs> MouseDown;
protected override bool OnKeyDown(System.Windows.Forms.KeyEventArgs eventArgs)
{
if (KeyDown != null)
{
KeyDown(this, eventArgs);
}
// let event pass down to others. we dont want to mark it as handled
return false;
}
protected override bool OnMouseDown(System.Windows.Forms.MouseEventArgs eventArgs)
{
if (MouseDown != null)
{
MouseDown(this, eventArgs);
}
// let event pass down to others. we dont want to mark it as handled
return false;
}
}
internal sealed class HighlightGlyphProvider : IDesignerGlyphProvider
{
private List<ActivityDesigner> highlightedDesigners;
private DesignerHighlighterMesageFilter messageFilter;
private ActivityDesigner rootDesigner;
public HighlightGlyphProvider(ActivityDesigner rootDesigner, List<ActivityDesigner> highlightedDesigners)
{
this.RootDesigner = rootDesigner;
this.HighlightedDesigners = highlightedDesigners;
}
public List<ActivityDesigner> HighlightedDesigners
{
get { return highlightedDesigners; }
set { highlightedDesigners = value; }
}
public DesignerHighlighterMesageFilter MessageFilter
{
get { return messageFilter; }
set { messageFilter = value; }
}
public ActivityDesigner RootDesigner
{
get { return rootDesigner; }
set { rootDesigner = value; }
}
public ActivityDesignerGlyphCollection GetGlyphs(ActivityDesigner activityDesigner)
{
if (activityDesigner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activityDesigner");
}
if (!activityDesigner.IsRootDesigner)
{
return null;
}
ActivityDesignerGlyphCollection glyphs = new ActivityDesignerGlyphCollection();
glyphs.Add(new HighlightOverlayGlyph(activityDesigner.Bounds, HighlightedDesigners));
return glyphs;
}
}
}
}
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