VertexToolTipTracker_ShowToolTip ( Object oSource, ToolTipTrackerEventArgs oToolTipTrackerEventArgs ) { AssertValid(); // Get the vertex that was hovered over. Debug.Assert(oToolTipTrackerEventArgs.Object is IVertex); IVertex oVertex = (IVertex)oToolTipTrackerEventArgs.Object; // Fire a VertexMouseHover event in case the application wants to take // additional action. FireVertexMouseHover(oVertex); if (!m_bShowVertexToolTips) { // Vertex tooltips aren't being shown, so no additional action is // required. return; } // Give PreviewVertexToolTipShown event handlers an opportunity to // override the default tooltip. VertexToolTipShownEventArgs oVertexToolTipShownEventArgs = new VertexToolTipShownEventArgs(oVertex); FirePreviewVertexToolTipShown(oVertexToolTipShownEventArgs); m_oVertexToolTip = oVertexToolTipShownEventArgs.VertexToolTip; if (m_oVertexToolTip == null) { // There was no default tooltip override. Does the vertex have a // tooltip string stored in its metadata? Object oVertexToolTipAsObject; if ( !oVertex.TryGetValue(ReservedMetadataKeys.PerVertexToolTip, typeof(String), out oVertexToolTipAsObject) ) { // No. Nothing needs to be done. return; } // Create a default tooltip. m_oVertexToolTip = CreateDefaultVertexToolTip( (String)oVertexToolTipAsObject); } // The tooltip shouldn't zoom. Compensate for a zoomed graph by // scaling the tooltip with the graph zoom's inverse. Double dScale = 1.0 / this.ScaleTransformForRender.ScaleX; m_oVertexToolTip.RenderTransform = new ScaleTransform(dScale, dScale); m_oGraphDrawer.AddVisualOnTopOfGraph(m_oVertexToolTip); // If this isn't called, MeasureOverride() may not be called and // m_oVertexToolTip won't get sized. this.InvalidateMeasure(); }
m_oNodeXLControl_PreviewVertexToolTipShown ( object sender, VertexToolTipShownEventArgs vertexToolTipShownEventArgs ) { AddToStatus("PreviewVertexToolTipShown"); #if false System.Windows.Controls.TextBox oTextBox = new System.Windows.Controls.TextBox(); oTextBox.MinWidth = 500; oTextBox.MinHeight = 100; vertexToolTipShownEventArgs.VertexToolTip = oTextBox; #endif }
FirePreviewVertexToolTipShown ( VertexToolTipShownEventArgs oVertexToolTipShownEventArgs ) { Debug.Assert(oVertexToolTipShownEventArgs != null); AssertValid(); VertexToolTipShownEventHandler oVertexToolTipShownEventHandler = this.PreviewVertexToolTipShown; if (oVertexToolTipShownEventHandler != null) { oVertexToolTipShownEventHandler(this, oVertexToolTipShownEventArgs); } }