public WorkflowView(IServiceProvider serviceProvider)
{
this.zoomLevel = 1f;
this.shadowDepth = WorkflowTheme.CurrentTheme.AmbientTheme.ShadowDepth;
this.stockMessageFilters = new List<WorkflowDesignerMessageFilter>();
this.customMessageFilters = new List<WorkflowDesignerMessageFilter>();
this.prePreviewZoom = 100;
this.prePreviewScroll = Point.Empty;
this.messageHitTestContexts = new Stack<System.Workflow.ComponentModel.Design.HitTestInfo>();
if (serviceProvider == null)
{
throw new ArgumentNullException("serviceProvider");
}
base.SuspendLayout();
this.AllowDrop = true;
this.AutoScroll = false;
base.HScroll = false;
base.VScroll = false;
base.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.EnableNotifyMessage | ControlStyles.AllPaintingInWmPaint | ControlStyles.Selectable | ControlStyles.Opaque | ControlStyles.UserPaint, true);
this.serviceProvider = serviceProvider;
IServiceContainer container = this.GetService(typeof(IServiceContainer)) as IServiceContainer;
if (container != null)
{
container.RemoveService(typeof(WorkflowView));
container.AddService(typeof(WorkflowView), this);
}
IUIService service = this.serviceProvider.GetService(typeof(IUIService)) as IUIService;
if (service != null)
{
WorkflowTheme.UIService = service;
}
this.EnsureScrollBars(new System.Windows.Forms.HScrollBar(), new System.Windows.Forms.VScrollBar());
this.workflowToolTip = new WorkflowToolTip(this);
WorkflowTheme.ThemeChanged += new EventHandler(this.OnThemeChange);
this.PopulateMessageFilters(true);
this.RootDesigner = ActivityDesigner.GetSafeRootDesigner(this);
this.fitAllAction = this.CreateDynamicAction();
if ((this.activeLayout == null) || (this.defaultLayout == null))
{
this.ActiveLayout = this.DefaultLayout = new WorkflowRootLayout(this.serviceProvider);
}
if (this.GetService(typeof(IMenuCommandService)) is IMenuCommandService)
{
this.commandSet = new System.Workflow.ComponentModel.Design.CommandSet(this);
this.commandSet.UpdatePanCommands(true);
}
ISelectionService service3 = this.GetService(typeof(ISelectionService)) as ISelectionService;
if (service3 != null)
{
service3.SelectionChanged += new EventHandler(this.OnSelectionChanged);
}
Application.AddMessageFilter(this);
base.ResumeLayout(true);
}
protected override void Dispose(bool disposing)
{
//Remove the proffered services
if (disposing)
{
try
{
SuspendLayout();
Application.RemoveMessageFilter(this);
if (this.layoutEventHandler != null)
{
Idle -= this.layoutEventHandler;
this.layoutEventHandler = null;
}
if (this.ensureVisibleEventHandler != null)
{
Idle -= this.ensureVisibleEventHandler;
this.ensureVisibleEventHandler = null;
}
if (this.idleEventHandler != null)
{
this.idleEventListeners = null;
Form host = TopLevelControl as Form;
if (!Application.MessageLoop || (host != null && host.Modal))
WorkflowTimer.Default.Unsubscribe(this.idleEventHandler);
else
Application.Idle -= this.idleEventHandler;
this.idleEventHandler = null;
}
ISelectionService selectionService = GetService(typeof(ISelectionService)) as ISelectionService;
if (selectionService != null)
selectionService.SelectionChanged -= new EventHandler(OnSelectionChanged);
//Unsubscribe the theme change
WorkflowTheme.ThemeChanged -= new EventHandler(OnThemeChange);
//Remove the dynamic action
if (this.fitAllAction != null)
{
this.fitAllAction.Dispose();
this.fitAllAction = null;
}
if (this.workflowToolTip != null)
{
((IDisposable)this.workflowToolTip).Dispose();
this.workflowToolTip = null;
}
DisposeMessageFilters(false);
DisposeMessageFilters(true);
//Dispose the layouts
this.activeLayout = null;
if (this.defaultLayout != null)
{
this.defaultLayout.Dispose();
this.defaultLayout = null;
}
//Destroy other resources
if (this.viewPortBitmap != null)
{
this.viewPortBitmap.Dispose();
this.viewPortBitmap = null;
}
if (this.commandSet != null)
{
this.commandSet.Dispose();
this.commandSet = null;
}
HScrollBar.ValueChanged -= new EventHandler(OnScroll);
VScrollBar.ValueChanged -= new EventHandler(OnScroll);
if (this.toolContainer != null)
{
Controls.Remove(this.toolContainer);
this.toolContainer.TabStrip.Tabs.Clear();
this.toolContainer.Dispose();
this.toolContainer = null;
}
IServiceContainer serviceContainer = GetService(typeof(IServiceContainer)) as IServiceContainer;
if (serviceContainer != null)
{
serviceContainer.RemoveService(typeof(WorkflowView));
}
}
finally
{
ResumeLayout(false);
}
}
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
try
{
base.SuspendLayout();
Application.RemoveMessageFilter(this);
if (this.layoutEventHandler != null)
{
this.Idle -= this.layoutEventHandler;
this.layoutEventHandler = null;
}
if (this.ensureVisibleEventHandler != null)
{
this.Idle -= this.ensureVisibleEventHandler;
this.ensureVisibleEventHandler = null;
}
if (this.idleEventHandler != null)
{
this.idleEventListeners = null;
Form topLevelControl = base.TopLevelControl as Form;
if (!Application.MessageLoop || ((topLevelControl != null) && topLevelControl.Modal))
{
WorkflowTimer.Default.Unsubscribe(this.idleEventHandler);
}
else
{
Application.Idle -= this.idleEventHandler;
}
this.idleEventHandler = null;
}
ISelectionService service = this.GetService(typeof(ISelectionService)) as ISelectionService;
if (service != null)
{
service.SelectionChanged -= new EventHandler(this.OnSelectionChanged);
}
WorkflowTheme.ThemeChanged -= new EventHandler(this.OnThemeChange);
if (this.fitAllAction != null)
{
this.fitAllAction.Dispose();
this.fitAllAction = null;
}
if (this.workflowToolTip != null)
{
((IDisposable) this.workflowToolTip).Dispose();
this.workflowToolTip = null;
}
this.DisposeMessageFilters(false);
this.DisposeMessageFilters(true);
this.activeLayout = null;
if (this.defaultLayout != null)
{
this.defaultLayout.Dispose();
this.defaultLayout = null;
}
if (this.viewPortBitmap != null)
{
this.viewPortBitmap.Dispose();
this.viewPortBitmap = null;
}
if (this.commandSet != null)
{
this.commandSet.Dispose();
this.commandSet = null;
}
this.HScrollBar.ValueChanged -= new EventHandler(this.OnScroll);
this.VScrollBar.ValueChanged -= new EventHandler(this.OnScroll);
if (this.toolContainer != null)
{
base.Controls.Remove(this.toolContainer);
this.toolContainer.TabStrip.Tabs.Clear();
this.toolContainer.Dispose();
this.toolContainer = null;
}
IServiceContainer container = this.GetService(typeof(IServiceContainer)) as IServiceContainer;
if (container != null)
{
container.RemoveService(typeof(WorkflowView));
}
}
finally
{
base.ResumeLayout(false);
}
}
base.Dispose(disposing);
}
public WorkflowView(IServiceProvider serviceProvider)
{
Debug.Assert(serviceProvider != null);
if (serviceProvider == null)
throw new ArgumentNullException("serviceProvider");
SuspendLayout();
AllowDrop = true;
AutoScroll = false;
HScroll = false;
VScroll = false;
SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.Opaque | ControlStyles.AllPaintingInWmPaint | ControlStyles.Selectable | ControlStyles.EnableNotifyMessage, true);
this.serviceProvider = serviceProvider;
//*****Promote the services which are accessed from other components
IServiceContainer serviceContainer = GetService(typeof(IServiceContainer)) as IServiceContainer;
if (serviceContainer != null)
{
//Remove any existing designer service if there is any
serviceContainer.RemoveService(typeof(WorkflowView));
serviceContainer.AddService(typeof(WorkflowView), this);
}
//set the UI Service to be used by themes
IUIService uiService = this.serviceProvider.GetService(typeof(IUIService)) as IUIService;
if (uiService != null)
WorkflowTheme.UIService = uiService;
//Make sure that we add scrollbars
EnsureScrollBars(new HScrollBar(), new VScrollBar());
//Initialize the tooltip shown
this.workflowToolTip = new WorkflowToolTip(this);
//[....] the global theme change event, which is fired by the theme infrastructure for theme change
WorkflowTheme.ThemeChanged += new EventHandler(OnThemeChange);
//Create the core message filters
PopulateMessageFilters(true);
//Set the root designer, note that the dynamic action is dependent on the DynamicActionMessageFilter pushed
//when the root is set.
RootDesigner = ActivityDesigner.GetSafeRootDesigner(this);
this.fitAllAction = CreateDynamicAction();
//If the active layout is still null then we will set the default layout as active layout
if (this.activeLayout == null || this.defaultLayout == null)
ActiveLayout = DefaultLayout = new WorkflowRootLayout(this.serviceProvider);
//Create the local command set and update all the commands once
IMenuCommandService menuCommandService = GetService(typeof(IMenuCommandService)) as IMenuCommandService;
if (menuCommandService != null)
{
this.commandSet = new CommandSet(this);
this.commandSet.UpdatePanCommands(true);
}
//Subscribe to selection change
ISelectionService selectionService = GetService(typeof(ISelectionService)) as ISelectionService;
if (selectionService != null)
selectionService.SelectionChanged += new EventHandler(OnSelectionChanged);
//In case of non VS case we need to pumpin the Keyboard messages, the user control sets
//focus to the child controls by default which is a problem so we need to trap the
//messages by adding application level message filter, in case of VS this is not required and
//the message filter is never called.
Application.AddMessageFilter(this);
//We make sure that during the construction we dont do perform layouts on idle event
ResumeLayout(true);
}
