private void UnbindFromDiagram(Diagram diagram)
{
if (diagram == null)
{
return;
}
DiagramPanel dpanel = diagram.Panel;
if (dpanel == null)
{
return;
}
dpanel.ViewportBoundsChanged -= this.ObservedPanel_ViewportBoundsChanged;
dpanel.DiagramBoundsChanged -= this.ObservedPanel_DiagramBoundsChanged;
dpanel.PartBoundsChanged -= this.ObservedPanel_PartBoundsChanged;
dpanel.PartVisibleChanged -= this.ObservedPanel_PartVisibleChanged;
diagram.TemplatesChanged -= this.ObservedDiagram_TemplatesChanged;
diagram.ModelReplaced -= this.ObservedDiagram_ModelReplaced;
if (this.Panel != null)
{
this.Panel.ViewportBoundsChanged += this.OverviewPanel_ViewportBoundsChanged;
}
this.BoundEventHandlers = false;
}
/// <summary>
/// Double click or Single click at node
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Border_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Node node = Part.FindAncestor <Node>(sender as UIElement);
if (node == null)
{
return;
}
NodeData nodeData = node.Data as NodeData;
if (nodeData == null)
{
return;
}
if (nodeData.obj is Bus)
{
Bus bus = nodeData.obj as Bus;
if (bus == null)
{
return;
}
if (DiagramPanel.IsDoubleClick(e))
{
e.Handled = true;
MessageBoxResult rs = MessageBox.Show(string.Format("Go to bus:\nID: {0}\nName: '{1}'?", bus.Key, bus.Name),
"Confirm", MessageBoxButton.YesNo);
if (rs != MessageBoxResult.Yes)
{
return;
}
selectedBusID = bus.Key;
Update();
}
else
{
TxtInfo.Text = string.Format("Bus:\nID: {0} Name: '{1}'", bus.Key, bus.Name);
}
}
else if (nodeData.obj is Generator)
{
Generator generator = nodeData.obj as Generator;
if (generator == null)
{
return;
}
TxtInfo.Text = string.Format("Generator:\nKey: {0} Name: '{1}'", generator.Key, generator.Name);
}
else if (nodeData.obj is Load)
{
Load load = nodeData.obj as Load;
if (load == null)
{
return;
}
TxtInfo.Text = string.Format("PSSE Load:\nBusID: {0} LoadID: '{1}'", load.BusID, load.LoadID);
}
}
private void UpdateBox()
{
Node box = this.Box;
if (box == null)
{
return;
}
Diagram observed = this.Observed;
if (observed == null)
{
return;
}
DiagramPanel dpanel = observed.Panel;
if (dpanel == null)
{
return;
}
FrameworkElement orect = box.VisualElement;
if (orect == null)
{
return;
}
Rect viewportbounds = dpanel.ViewportBounds;
orect.Width = viewportbounds.Width;
orect.Height = viewportbounds.Height;
box.Position = new Point(viewportbounds.X, viewportbounds.Y);
// try to keep the box visible in the overview
this.Panel.MakeVisible(box, Rect.Empty);
}
private void QueueBackgroundGridUpdate(DiagramPanel panel)
{
this.UpdateBackgroundGridNeeded = false;
if (ShouldCacheBitmap(panel))
{
// stop any current timer
if (this.Timer != null)
{
this.Timer.Stop();
}
// start a new timer
this.Timer = new System.Windows.Threading.DispatcherTimer();
this.Timer.Tick += (s, e) => {
var tim = s as System.Windows.Threading.DispatcherTimer;
if (tim != null)
{
tim.Stop(); // don't repeat
}
this.Timer = null;
Rect viewrect = panel.ViewportBounds;
double scale = panel.Scale;
DoUpdateBackgroundGrid(panel, viewrect, scale, true);
};
// wait half second before calling DoUpdateBackgroundGrid
this.Timer.Interval = new TimeSpan(0, 0, 0, 0, 500);
this.Timer.Start();
}
else // just call DoUpdateBackgroundGrid right now
{
Rect viewrect = panel.ViewportBounds;
double scale = panel.Scale;
DoUpdateBackgroundGrid(panel, viewrect, scale, true);
}
}
/// <summary>
/// Show a print dialog and start printing.
/// </summary>
public void Print()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
IDiagramModel model = diagram.Model;
if (model == null)
{
return;
}
this._wasVirtualizing = panel.IsVirtualizing;
panel.UpdateAllVisuals();
panel.IsVirtualizing = false;
PrintDocument pdoc = new PrintDocument();
pdoc.BeginPrint += pdoc_BeginPrint;
pdoc.EndPrint += pdoc_EndPrint;
pdoc.PrintPage += pdoc_PrintPage;
String modelname = (model.Name != null ? model.Name : "Diagram");
pdoc.Print(modelname);
}
private void FinishedLayout() // no animation
{
this.SkipsInvalidate = false;
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
//Diagram.Debug(diagram.Name + ".IsEnabled finished " + diagram.IsEnabled.ToString() + " no animation");
Diagram.InvokeLater(this, ClearSizeChangedByLayoutFlags);
diagram.Cursor = null;
IDiagramModel model = diagram.Model;
if (model != null)
{
model.SkipsUndoManager = this.WasSkippingUndoManager;
}
DiagramPanel panel = diagram.Panel;
if (panel != null)
{
panel.InvokeUpdateDiagramBounds("Layout");
}
}
private void Node_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Only executes logic if you have double-clicked.
if (DiagramPanel.IsDoubleClick(e))
{
e.Handled = true;
Node clicked = Part.FindAncestor <Node>(sender as UIElement);
if (clicked != null)
{
Employee thisemp = (Employee)clicked.Data;
myDiagram.StartTransaction("New Employee");
Employee newemp = new Employee()
{
Key = 1, // can't use zero, because zero means "no boss"
Name = "(new person)",
ParentKey = thisemp.Key, // the clicked employee is the new boss
Location = Spot.BottomLeft.PointInRect(clicked.Bounds) // start underneath
};
myDiagram.Model.AddNode(newemp);
myDiagram.CommitTransaction("New Employee");
}
}
}
private void Node_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Only creates a new employee if you have double-clicked a non-assistant.
if (DiagramPanel.IsDoubleClick(e))
{
e.Handled = true;
Node clicked = Part.FindAncestor <Node>(sender as UIElement);
if (clicked != null && clicked.Category != "Comment")
{
Employee thisemp = (Employee)clicked.Data;
myDiagram.StartTransaction("New Employee");
Employee newemp = new Employee()
{
Key = 1, // can't use zero, because zero means "no boss"
Name = "(new person)",
ParentKey = thisemp.Key, // the clicked employee is the new boss
};
if (Keyboard.Modifiers != ModifierKeys.Shift) // if shift is not held, add an Employee
{
newemp.Category = "";
newemp.Location = Spot.BottomLeft.PointInRect(clicked.Bounds); // start underneath
}
else // if shift is held, add an Assistant
{
newemp.Category = "Comment";
newemp.Location = Spot.TopRight.PointInRect(clicked.Bounds); // start on right side
}
myDiagram.Model.AddNode(newemp);
myDiagram.CommitTransaction("New Employee");
}
}
}
private void pdoc_EndPrint(object sender, EndPrintEventArgs e)
{
this.PartsToPrint = null;
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
panel.ReleasePrintingPanel();
panel.IsVirtualizing = this._wasVirtualizing;
// Silverlight adornments might have wrong offsets afterwards -- fix up:
foreach (Part p in diagram.SelectedParts)
{
p.RefreshAdornments();
}
panel.UpdateScrollTransform();
diagram.Cursor = null;
}
/// <summary>
/// Show a print dialog and start printing.
/// </summary>
public void Print()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
IDiagramModel model = diagram.Model;
if (model == null)
{
return;
}
String modelname = (model.Name != null ? model.Name : "Diagram");
this.EffectivePageCount = 0; // uninitialized
this.PageIndex = 0;
PrintDocument pdoc = new PrintDocument();
pdoc.BeginPrint += pdoc_BeginPrint;
pdoc.EndPrint += pdoc_EndPrint;
pdoc.PrintPage += pdoc_PrintPage;
pdoc.Print(modelname);
}
internal void DoUpdateBackgroundGrid(DiagramPanel panel, Rect bounds, double scale, bool delayed)
{
Diagram diagram = panel.Diagram;
if (diagram == null)
{
return;
}
if (!diagram.GridVisible || diagram.GridPattern != this)
{
return;
}
if (this.RenderedViewport == bounds && this.RenderedScale == scale)
{
return;
}
// pretend to scroll the grid appropriately
Point origin = diagram.GridSnapOrigin;
this.Origin = new Point(origin.X - bounds.X, origin.Y - bounds.Y);
// remember to avoid duplicate renderings
this.RenderedViewport = bounds;
this.RenderedScale = scale; // also used by GetDefiningGeometry
// size it to fill the viewport
Size gridsize = new Size(bounds.Width, bounds.Height);
this.Width = gridsize.Width;
this.Height = gridsize.Height;
//Diagram.Debug("Grid: " + Diagram.Str(bounds) + scale.ToString() + " " + Diagram.Str(gridsize));
// scale this GridPattern
this.RenderTransformOrigin = new Point(0, 0);
this.RenderTransform = new ScaleTransform()
{
CenterX = 0, CenterY = 0, ScaleX = scale, ScaleY = scale
};
// get it to update
InvalidateMeasure();
//panel.InvalidateMeasure();
if (!delayed || !panel.CachesBitmap)
{
panel.ClearBackground();
// before rendering, make sure the grid lines have been updated
Measure(gridsize);
Arrange(new Rect(0, 0, gridsize.Width, gridsize.Height));
//Diagram.Debug("Grid arranged: " + Diagram.Str(bounds) + scale.ToString() + " " + Diagram.Str(gridsize) + "actual: " + Diagram.Str(this.ActualWidth) + "x" + Diagram.Str(this.ActualHeight));
}
else
{
//Diagram.Debug("Grid invalidated measure");
}
}
private void BindToDiagram(Diagram diagram)
{
if (diagram == null)
{
this.Model = null;
return;
}
if (diagram.Model is PartsModel)
{
Diagram.Error("cannot show an Overview of a Diagram with a PartsModel");
return;
}
// Overview's Template not yet applied?
// Wait for OnApplyTemplate to call BindToDiagram.
DiagramPanel vpanel = this.Panel;
if (vpanel == null)
{
return;
}
//vpanel.IsVirtualizing = false;
// Observed diagram's Template not yet applied?
// When its template has been applied, call DelayBindingForObserved.
DiagramPanel dpanel = diagram.Panel;
if (dpanel == null)
{
diagram.TemplateApplied += DelayBindingForObserved;
return;
}
if (!this.BoundEventHandlers)
{
// try to avoid executing this twice
this.BoundEventHandlers = true;
dpanel.ViewportBoundsChanged += this.ObservedPanel_ViewportBoundsChanged;
dpanel.DiagramBoundsChanged += this.ObservedPanel_DiagramBoundsChanged;
dpanel.PartBoundsChanged += this.ObservedPanel_PartBoundsChanged;
dpanel.PartVisibleChanged += this.ObservedPanel_PartVisibleChanged;
dpanel.AnimatingChanged += this.ObservedPanel_AnimatingChanged;
diagram.TemplatesChanged += this.ObservedDiagram_TemplatesChanged;
diagram.ModelReplaced += this.ObservedDiagram_ModelReplaced;
}
UpdateModel();
UpdateTemplates();
UpdateNodesAndLinks();
BindBox();
}
public override void DoMouseWheel()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
int delta = GetWheelDelta();
if (delta == 0)
{
return;
}
bool shift = IsShiftKeyDown();
bool control = IsControlKeyDown();
var pm = diagram.PrintManager as PreviewingPrintManager;
if (pm != null && pm.IsPreviewEnabled && shift && control)
{
double scale = pm.Scale;
if (Double.IsNaN(scale) || scale <= 0 || Double.IsInfinity(scale))
{
scale = 1;
}
else if (delta > 0)
{
scale *= 1.05;
}
else
{
scale /= 1.05;
}
pm.Scale = scale;
pm.UpdatePrintGrid();
MouseWheelEventArgs e = diagram.LastMouseEventArgs as MouseWheelEventArgs;
if (e != null)
{
e.Handled = true;
}
}
else
{
base.DoMouseWheel();
}
}
// when used as the Diagram's GridPattern background
internal void InvokeBackgroundGridUpdate(DiagramPanel panel)
{
if (this.Timer != null)
{
this.Timer.Stop();
this.Timer = null;
}
if (!this.UpdateBackgroundGridNeeded)
{
this.UpdateBackgroundGridNeeded = true;
Diagram.InvokeLater(this, () => QueueBackgroundGridUpdate(panel));
}
}
private void FinishedLayoutAnimation()
{
this.SkipsInvalidate = false;
if (!this.IsAnimating)
{
return;
}
this.IsAnimating = false;
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
//Diagram.Debug("Finished animation: " + diagram.Name);
if (this.WasEnabled)
{
this.WasEnabled = false;
diagram.ClearValue(System.Windows.Controls.Control.IsEnabledProperty);
}
if (this.HadFocus)
{
diagram.Focus();
}
diagram.Cursor = null;
IDiagramModel model = diagram.Model;
if (model != null)
{
model.SkipsUndoManager = false;
}
// combine layout edits into previous transaction
if (model != null)
{
UndoManager undomgr = model.UndoManager;
if (undomgr != null)
{
undomgr.CoalesceLastTransaction("Layout");
}
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
panel.InvokeUpdateDiagramBounds("Layout");
}
private void BindToDiagram(Diagram diagram)
{
if (diagram == null)
{
this.Model = null;
return;
}
if (diagram.Model is PartsModel)
{
Diagram.Error("cannot show an Overview of a Diagram with a PartsModel");
return;
}
ApplyTemplate();
DiagramPanel vpanel = this.Panel;
if (vpanel == null)
{
return;
}
//vpanel.IsVirtualizing = false;
diagram.ApplyTemplate();
DiagramPanel dpanel = diagram.Panel;
if (dpanel == null)
{
return;
}
if (!this.BoundEventHandlers)
{
// try to avoid executing this twice
this.BoundEventHandlers = true;
dpanel.ViewportBoundsChanged += this.ObservedPanel_ViewportBoundsChanged;
dpanel.DiagramBoundsChanged += this.ObservedPanel_DiagramBoundsChanged;
dpanel.PartBoundsChanged += this.ObservedPanel_PartBoundsChanged;
dpanel.PartVisibleChanged += this.ObservedPanel_PartVisibleChanged;
diagram.TemplatesChanged += this.ObservedDiagram_TemplatesChanged;
diagram.ModelReplaced += this.ObservedDiagram_ModelReplaced;
vpanel.ViewportBoundsChanged += this.OverviewPanel_ViewportBoundsChanged;
}
UpdateModel();
UpdateTemplates();
BindBox();
}
/// <summary>
/// This calls <c>UIElement.ReleaseMouseCapture</c> on the <see cref="Diagram"/>'s <see cref="Northwoods.GoXam.Diagram.Panel"/>.
/// </summary>
protected virtual void ReleaseMouse()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
panel.ReleaseMouse();
}
/// <summary>
/// This override establishes an event handler that notices when the <see cref="Palette"/>'s
/// <see cref="DiagramPanel"/>'s <see cref="DiagramPanel.ViewportBounds"/> changes,
/// which then causes the layout to be performed again.
/// </summary>
public override void OnApplyTemplate()
{
// use a different default Layout than what Diagram.OnApplyTemplate might set
if (this.Layout == null)
{
this.Layout = new Northwoods.GoXam.Layout.GridLayout();
}
base.OnApplyTemplate();
DiagramPanel panel = this.Panel;
if (panel != null && !this.EventHandlerEstablished)
{
panel.ViewportBoundsChanged += Panel_ViewportBoundsChanged;
this.EventHandlerEstablished = true;
}
}
/// <summary>
/// Return true when the last mouse down event occurred very close to and very soon after the previous mouse down event.
/// </summary>
/// <returns></returns>
protected virtual bool IsDoubleClick()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return(false);
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return(false);
}
return(panel.IsDoubleClick());
}
/// <summary>
/// Return true when the alt key modifier is pressed.
/// </summary>
/// <returns></returns>
protected virtual bool IsAltKeyDown()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return(false);
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return(false);
}
return(panel.IsAltKeyDown());
}
/// <summary>
/// Return how much the wheel has turned.
/// </summary>
/// <returns>
/// If the last mouse event was the mouse wheel turning forward, this returns a positive integer.
/// If the last mouse event was the mouse wheel turning backward, this returns a negative integer.
/// Otherwise this returns zero.
/// </returns>
protected virtual int GetWheelDelta()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return(0);
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return(0);
}
return(panel.GetWheelDelta());
}
private IStudioControl OpenControl(StrategyInfo info)
{
IStudioControl ctrl = null;
switch (StrategyInfo.Type)
{
case StrategyInfoTypes.SourceCode:
case StrategyInfoTypes.Analytics:
ctrl = OpenControl(info.Id.To <string>(), typeof(StrategyInfoCodeContent), info, () =>
{
var c = new StrategyInfoCodeContent {
StrategyInfo = info
};
ConfigManager
.GetService <IStudioCommandService>()
.Bind(info.GetKey(), c);
return(c);
});
break;
case StrategyInfoTypes.Diagram:
ctrl = OpenControl(info.Id.To <string>(), typeof(DiagramPanel), info, () =>
{
var c = new DiagramPanel {
StrategyInfo = info
};
ConfigManager
.GetService <IStudioCommandService>()
.Bind(info.GetKey(), c);
return(c);
});
break;
case StrategyInfoTypes.Assembly:
case StrategyInfoTypes.Terminal:
break;
default:
throw new ArgumentOutOfRangeException();
}
return(ctrl);
}
private void pdoc_EndPrint(object sender, EndPrintEventArgs e)
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return;
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return;
}
panel.ReleasePrintingPanel();
panel.UpdateScrollTransform();
diagram.Cursor = null;
}
public override void DoMouseMove()
{
if (this.Active)
{
Overview ov = this.Diagram as Overview;
if (ov != null && ov.Observed != null)
{
Diagram diag = ov.Observed;
DiagramPanel obpanel = diag.Panel;
if (obpanel != null)
{
Rect viewport = obpanel.ViewportBounds;
Point pt = ov.LastMousePointInModel;
obpanel.Position = new Point(pt.X - viewport.Width / 2, pt.Y - viewport.Height / 2);
}
}
}
}
// handle a mouse-down on an input node: toggle its Value if it's a double-click
private void StartNodeDoubleClick(object sender, MouseButtonEventArgs e)
{
// Only executes logic if you have double-clicked.
if (DiagramPanel.IsDoubleClick(e))
{
myDiagram.StartTransaction("Toggle");
// When you double-click, toggles value of Input node
Node input = Part.FindAncestor <Node>(sender as UIElement);
if (input != null)
{
GateData d = input.Data as GateData;
if (d != null && d.GateType == "Input")
{
d.Value = !d.Value;
}
}
myDiagram.CommitTransaction("Toggle");
}
}
/// <summary>
/// Return true when the last mouse point is far enough away from the first mouse down point
/// to constitute a drag operation instead of just a potential click.
/// </summary>
/// <returns>true if the first and last mouse points are more than two pixels apart in either axis</returns>
protected virtual bool IsBeyondDragSize()
{
Diagram diagram = this.Diagram;
if (diagram == null)
{
return(false);
}
DiagramPanel panel = diagram.Panel;
if (panel == null)
{
return(false);
}
// Get all of the points in screen/view coordinates
Point first = panel.TransformModelToView(diagram.FirstMousePointInModel);
Point last = panel.TransformModelToView(diagram.LastMousePointInModel);
return(DiagramPanel.IsBeyondDragSize(last, first));
}
public BitmapSource MakeBitmap(DiagramPanel diagramPanel)
{
Rect bounds = diagramPanel.DiagramBounds;
double width = bounds.Width;
double height = bounds.Height;
double scale = 1.0;
if (width > 2000)
{
scale = 2000 / width;
}
if (height > 2000)
{
scale = Math.Min(scale, 2000 / height);
}
width = Math.Ceiling(width * scale);
height = Math.Ceiling(height * scale);
return(diagramPanel.MakeBitmap(new Size(width, height), 96, new Point(bounds.X, bounds.Y), scale));
}
private void ObservedPanel_DiagramBoundsChanged(object sender, EventArgs e)
{
Diagram observed = this.Observed;
if (observed == null)
{
return;
}
DiagramPanel dpanel = observed.Panel;
if (dpanel == null)
{
return;
}
Rect r = dpanel.DiagramBounds;
if (this.Box != null)
{
Rect b = this.Box.Bounds;
Geo.Inflate(ref b, 10, 10);
r.Union(b);
}
this.Panel.FixedBounds = r;
}
internal void TransformBrush(DiagramPanel panel) {
}
internal void FinishedPrinting(DiagramPanel panel)
{
this.Visibility = Visibility.Collapsed;
}
internal void PrepareForPrinting(DiagramPanel panel, Rect viewb, double scale)
{
this.Visibility = Visibility.Visible;
DoUpdateBackgroundGrid(panel, viewb, scale, false); // false: no bitmap cache update needed
}
// when used as the Diagram's GridPattern background
internal void InvokeBackgroundGridUpdate(DiagramPanel panel) {
if (this.Timer != null) {
this.Timer.Stop();
this.Timer = null;
}
if (!this.UpdateBackgroundGridNeeded) {
this.UpdateBackgroundGridNeeded = true;
Diagram.InvokeLater(this, () => QueueBackgroundGridUpdate(panel));
}
}
private void QueueBackgroundGridUpdate(DiagramPanel panel) {
this.UpdateBackgroundGridNeeded = false;
if (ShouldCacheBitmap(panel)) {
// stop any current timer
if (this.Timer != null) this.Timer.Stop();
// start a new timer
this.Timer = new System.Windows.Threading.DispatcherTimer();
this.Timer.Tick += (s, e) => {
var tim = s as System.Windows.Threading.DispatcherTimer;
if (tim != null) tim.Stop(); // don't repeat
this.Timer = null;
Rect viewrect = panel.ViewportBounds;
double scale = panel.Scale;
DoUpdateBackgroundGrid(panel, viewrect, scale, true);
};
// wait half second before calling DoUpdateBackgroundGrid
this.Timer.Interval = new TimeSpan(0, 0, 0, 0, 500);
this.Timer.Start();
} else { // just call DoUpdateBackgroundGrid right now
Rect viewrect = panel.ViewportBounds;
double scale = panel.Scale;
DoUpdateBackgroundGrid(panel, viewrect, scale, true);
}
}
internal void FinishedPrinting(DiagramPanel panel) {
this.Visibility = Visibility.Collapsed;
}
/// <summary>
/// Recreates the line.
/// </summary>
/// <param name="panel">The panel.</param>
/// <param name="left">The left.</param>
/// <param name="top">The top.</param>
private void RecreateLine(DiagramPanel panel, double left, double top)
{
lock (panel)
{
panel.Children.Remove(_line);
_line = CreateRubberBandLine();
_line.X1 = _lineStartPosition.X;
_line.Y1 = _lineStartPosition.Y;
_line.X2 = left;
_line.Y2 = top;
panel.Children.Add(_line);
}
}
internal void DoUpdateBackgroundGrid(DiagramPanel panel, Rect bounds, double scale, bool delayed) {
Diagram diagram = panel.Diagram;
if (diagram == null) return;
if (!diagram.GridVisible || diagram.GridPattern != this) return;
if (this.RenderedViewport == bounds && this.RenderedScale == scale) return;
// pretend to scroll the grid appropriately
Point origin = diagram.GridSnapOrigin;
this.Origin = new Point(origin.X-bounds.X, origin.Y-bounds.Y);
// remember to avoid duplicate renderings
this.RenderedViewport = bounds;
this.RenderedScale = scale; // also used by GetDefiningGeometry
// size it to fill the viewport
Size gridsize = new Size(bounds.Width, bounds.Height);
this.Width = gridsize.Width;
this.Height = gridsize.Height;
//Diagram.Debug("Grid: " + Diagram.Str(bounds) + scale.ToString() + " " + Diagram.Str(gridsize));
// scale this GridPattern
this.RenderTransformOrigin = new Point(0, 0);
this.RenderTransform = new ScaleTransform() { CenterX=0, CenterY=0, ScaleX=scale, ScaleY=scale };
// get it to update
InvalidateMeasure();
//panel.InvalidateMeasure();
if (!delayed || !panel.CachesBitmap) {
panel.ClearBackground();
// before rendering, make sure the grid lines have been updated
Measure(gridsize);
Arrange(new Rect(0, 0, gridsize.Width, gridsize.Height));
}
}
//?? ought to decide based on complexity of drawing the grid, not the size
// currently just checks for > 1 megapixel
private bool ShouldCacheBitmap(DiagramPanel panel) {
return panel.CachesBitmap && panel.ViewportWidth*panel.ViewportHeight > 1000*1000;
}
internal void PrepareForPrinting(DiagramPanel panel, Rect viewb, double scale) {
this.Visibility = Visibility.Visible;
DoUpdateBackgroundGrid(panel, viewb, scale, false); // false: no bitmap cache update needed
}
/// <summary>
/// Removes temporary line object from the design canvas
/// </summary>
/// <param name="mapPanel">The map panel.</param>
private void CancelLink(DiagramPanel mapPanel)
{
if (_line == null)
{
return;
}
mapPanel.Children.Remove(_line);
_line = null;
}