Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Design / MessageFilters / WorkflowDesignerMessageFilter.cs / 1305376 / WorkflowDesignerMessageFilter.cs
namespace System.Workflow.ComponentModel.Design { using System; using System.Drawing; using System.Diagnostics; using System.Windows.Forms; using System.ComponentModel.Design; #region Class WorkflowDesignerMessageFilter //All Coordinates passed in physical coordinate system //Some of the functions will have coordinates in screen coordinates ie ShowContextMenu public abstract class WorkflowDesignerMessageFilter : IDisposable, IWorkflowDesignerMessageSink { #region Members and Contructor/Destruction private WorkflowView parentView; protected WorkflowDesignerMessageFilter() { } ~WorkflowDesignerMessageFilter() { Dispose(false); } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } #endregion #region Protected Properties and Methods protected virtual void Initialize(WorkflowView parentView) { this.parentView = parentView; } protected virtual void Dispose(bool disposing) { } protected virtual bool OnMouseDown(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseMove(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseUp(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseDoubleClick(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseEnter(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseHover(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseLeave() { return false; } protected virtual bool OnMouseWheel(MouseEventArgs eventArgs) { return false; } protected virtual bool OnMouseCaptureChanged() { return false; } protected virtual bool OnDragEnter(DragEventArgs eventArgs) { return false; } protected virtual bool OnDragOver(DragEventArgs eventArgs) { return false; } protected virtual bool OnDragLeave() { return false; } protected virtual bool OnDragDrop(DragEventArgs eventArgs) { return false; } protected virtual bool OnGiveFeedback(GiveFeedbackEventArgs eventArgs) { return false; } protected virtual bool OnQueryContinueDrag(QueryContinueDragEventArgs eventArgs) { return false; } protected virtual bool OnKeyDown(KeyEventArgs eventArgs) { return false; } protected virtual bool OnKeyUp(KeyEventArgs eventArgs) { return false; } protected virtual bool OnScroll(ScrollBar sender, int value) { return false; } protected virtual bool OnShowContextMenu(Point screenMenuPoint) { return false; } protected virtual bool OnPaint(PaintEventArgs eventArgs, Rectangle viewPort, AmbientTheme ambientTheme) { return false; } protected virtual bool OnPaintWorkflowAdornments(PaintEventArgs eventArgs, Rectangle viewPort, AmbientTheme ambientTheme) { return false; } protected virtual bool ProcessMessage(Message message) { return false; } protected virtual void OnLayout(LayoutEventArgs eventArgs) { } protected virtual void OnThemeChange() { } protected WorkflowView ParentView { get { return this.parentView; } } protected HitTestInfo MessageHitTestContext { get { HitTestInfo hitInfo = ParentView.MessageHitTestContext; if (hitInfo == null) hitInfo = HitTestInfo.Nowhere; return hitInfo; } } #endregion #region Private Methods internal object GetService(Type serviceType) { object service = null; if (this.parentView != null) service = ((IServiceProvider)this.parentView).GetService(serviceType); return service; } internal void SetParentView(WorkflowView parentView) { Initialize(parentView); } #endregion #region IWorkflowDesignerMessageSink Members bool IWorkflowDesignerMessageSink.OnMouseDown(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseDown(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseMove(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseMove(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseUp(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseUp(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseDoubleClick(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseDoubleClick(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseEnter(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseEnter(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseHover(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseHover(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseLeave() { bool handled = false; try { handled = OnMouseLeave(); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseWheel(MouseEventArgs eventArgs) { bool handled = false; try { handled = OnMouseWheel(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseCaptureChanged() { bool handled = false; try { handled = OnMouseCaptureChanged(); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnMouseDragBegin(Point initialPoint, MouseEventArgs eventArgs) { //This message is not used in MessageFilters return false; } bool IWorkflowDesignerMessageSink.OnMouseDragMove(MouseEventArgs eventArgs) { //This message is not used in MessageFilters return false; } bool IWorkflowDesignerMessageSink.OnMouseDragEnd() { //This message is not used in MessageFilters return false; } bool IWorkflowDesignerMessageSink.OnDragEnter(DragEventArgs eventArgs) { bool handled = false; try { handled = OnDragEnter(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnDragOver(DragEventArgs eventArgs) { bool handled = false; try { handled = OnDragOver(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnDragLeave() { bool handled = false; try { handled = OnDragLeave(); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnDragDrop(DragEventArgs eventArgs) { bool handled = false; try { handled = OnDragDrop(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnGiveFeedback(GiveFeedbackEventArgs eventArgs) { bool handled = false; try { handled = OnGiveFeedback(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnQueryContinueDrag(QueryContinueDragEventArgs eventArgs) { bool handled = false; try { handled = OnQueryContinueDrag(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnKeyDown(KeyEventArgs eventArgs) { bool handled = false; try { handled = OnKeyDown(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnKeyUp(KeyEventArgs eventArgs) { bool handled = false; try { handled = OnKeyUp(eventArgs); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnScroll(ScrollBar sender, int value) { bool handled = false; try { handled = OnScroll(sender, value); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnShowContextMenu(Point screenMenuPoint) { bool handled = false; try { handled = OnShowContextMenu(screenMenuPoint); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnPaint(PaintEventArgs eventArgs, Rectangle viewPort) { bool handled = false; try { handled = OnPaint(eventArgs, viewPort, WorkflowTheme.CurrentTheme.AmbientTheme); } catch { } return handled; } bool IWorkflowDesignerMessageSink.OnPaintWorkflowAdornments(PaintEventArgs eventArgs, Rectangle viewPort) { bool handled = false; try { handled = OnPaintWorkflowAdornments(eventArgs, viewPort, WorkflowTheme.CurrentTheme.AmbientTheme); } catch { } return handled; } bool IWorkflowDesignerMessageSink.ProcessMessage(Message message) { bool handled = false; try { handled = ProcessMessage(message); } catch { } return handled; } void IWorkflowDesignerMessageSink.OnLayout(LayoutEventArgs layoutEventArgs) { try { OnLayout(layoutEventArgs); } catch { } } void IWorkflowDesignerMessageSink.OnLayoutPosition(Graphics graphics) { //This message is not used in MessageFilters } void IWorkflowDesignerMessageSink.OnLayoutSize(Graphics graphics) { //This message is not used in MessageFilters } void IWorkflowDesignerMessageSink.OnThemeChange() { try { OnThemeChange(); } catch { } } void IWorkflowDesignerMessageSink.OnBeginResizing(DesignerEdges sizingEdge) { } void IWorkflowDesignerMessageSink.OnResizing(DesignerEdges sizingEdge, Rectangle bounds) { } void IWorkflowDesignerMessageSink.OnEndResizing() { } #endregion } #endregion } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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